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. 2025 Feb 12;55(4):e70003. doi: 10.1111/eci.70003

Pharmacological treatment options for metabolic dysfunction‐associated steatotic liver disease in patients with type 2 diabetes mellitus: A systematic review

Laura A M Konings 1,2,, Lorena Miguelañez‐Matute 1, Anna M P Boeren 1, Inge A T van de Luitgaarden 3, Femme Dirksmeier 4, Rob J de Knegt 5, Maarten E Tushuizen 6, Diederick E Grobbee 3, Adriaan G Holleboom 7, Manuel Castro Cabezas 1,2,3
PMCID: PMC11891831  PMID: 39937036

Abstract

Background

Metabolic dysfunction‐associated steatotic liver disease (MASLD) is closely related to type 2 diabetes mellitus (T2DM) through a common root in insulin resistance. The more severe stage, metabolic dysfunction‐associated steatohepatitis (MASH), increases the risk for cardiovascular complications, liver cirrhosis and hepatocellular carcinoma. Several trials investigating established antidiabetic‐drugs in patients with T2DM and MASLD have yielded promising results. Therefore, we aimed to systematically review the effect of T2DM‐drug treatment on MALSD parameters.

Methods

Medical databases were searched until January 2025 for controlled trials in patients with T2DM and MASLD/MASH. Studies that evaluated the effect of T2DM‐medication on the severity of MASLD/MASH in T2DM patients were included. The quality of the studies was assessed by three independent reviewers using a set of Cochrane risk‐of‐bias tools.

Results

Of 1748 references, 117 studies fulfilled the inclusion‐criteria and were assessed for eligibility in full‐text. Fifty‐two articles were included. Data included a total of 64.708 patients and study populations ranged from 9 to 50.742. Heterogeneity in study‐design and analysis hampered the comparability of the results. Most evidence was present for GLP‐1 receptor agonists, SGLT2‐inhibitors and PPAR‐γ‐agonists for regression of liver fibrosis and MASH.

Conclusion

Studies on the value of T2DM‐drug treatment in the improvement of MASLD vary significantly in study design, size and quality. GLP‐1 receptor agonists, PPAR‐γ‐agonists, SGLT2‐inhibitors may all be preferred pharmacological interventions for patients with MASLD/MASH and T2DM. Newer agents like dual GLP‐1/GIP or triple GLP‐1/GIP/Glucagon agonists will likely play an important role in the treatment of MASLD/MASH in the near future.

Keywords: MASH, MASLD, NAFLD, NASH, pharmacotherapy, T2DM


Pharmacological treatment options for metabolic dysfunction‐associated steatotic liver disease in patients with type 2 diabetes mellitus: a systematic review. For this systematic review medical databases were searched for studies that evaluated the effect of diabetes‐medication on the severity of metabolic dysfunction‐associated steatotic liver disease in type 2 diabetes mellitus (T2DM) patients. Of 1748 references, fifty‐two articles were included. Data included a total of 64.708 patients. Included studies vary significantly in study design, size and quality. GLP‐1 receptor agonists, PPAR‐γ‐agonists, SGLT2‐inhibitors and perhaps the newer GIP/GLP‐1 receptor agonists may all be preferred pharmacological interventions for patients with MASLD and T2DM.

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1. INTRODUCTION

Metabolic dysfunction‐associated steatotic liver disease is defined as an accumulation of lipids in more than 5% of the parenchymal cells of the liver in absence of excessive alcohol consumption, drug use or other diseases that can induce steatosis. 1 Intrahepatic fat accumulation may cause inflammation, ballooning of the hepatocytes and fibrosis, which then is known as metabolic dysfunction‐associated steatohepatitis (MASH). 2 This condition may lead to liver cirrhosis followed by liver failure or hepatocellular carcinoma. 3 MASLD has been associated with obesity, metabolic syndrome and type 2 diabetes (T2DM). It may not be surprising that international studies suggest that over 60% of T2DM patients have MASLD. 4

All of these metabolic diseases are closely linked to higher cardiovascular and liver‐related mortality which is a worldwide growing problem. 5 MASLD on itself has also been associated with cardiovascular disease. 6 , 7 The prevalence of MASLD across the globe has been estimated to be close to 30%. 2 , 8 Despite these large numbers, there is a lack of awareness in diagnosing and staging MASLD in T2DM patients, even though early diagnosis and treatment could prevent or even reverse progression. 9

Insulin resistance plays a crucial role in the development of MASLD, resulting in less efficient adipose tissue inhibition of lipolysis leading to an increased release of free fatty acids (FFAs) in the circulation. 10 In addition, insulin resistance is associated with elevated concentrations of circulating triglyceride rich lipoproteins, the FFAs generated during lipolysis of these lipoproteins contribute significantly to hepatic steatosis. 11 Finally, insulin resistance upregulates hepatic de novo lipogenesis. 12 All these mechanisms closely related to insulin resistance lead to hepatic lipid accumulation. 10 The accumulation of lipids and insulin resistance may lead to oxidative stress and activation of inflammatory pathways in the liver, resulting in cellular damage and finally fibrosis. 13 , 14

Various interventions such as lifestyle modifications, pharmacological treatment and bariatric surgery are currently being investigated in relation to MASLD/MASH. 15 , 16 , 17 Weight reduction and dietary changes have shown to be effective in the treatment of MASLD, although this has not been established with internationally accepted criteria as those required for pharmacological interventions. Multiple drugs used in the treatment of T2DM such as sodium‐glucose cotransporter 2 (SGLT)‐inhibitors and glucagon‐like peptide 1 (GLP1) receptor agonists may have a beneficial effect on MASLD/MASH, while other drugs may have a negative effect due to increase in body weight like sulfonylurea derivatives (SU) and insulin. 17 Several trials including T2DM treatments in subjects with MASLD have described promising results and large phase 3 studies are underway. The aim of this paper was to systematically review existing evidence for beneficial effects on MASLD by T2DM drug treatment in order to provide clinicians up to date information on which to base their treatment choices.

2. METHODS

This systematic literature review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta‐analysis (PRISMA) guidelines and the Cochrane review handbook. 18

2.1. Search Strategy

We conducted an extensive literature search to identify all studies evaluating T2DM medication in subjects with MASLD using the MEDLINE (Pubmed) electronic database, the Cochrane Library and CINAHL database. We included articles published until January 2025 and set a restriction on English language. Our search strategy included the terms: Metabolic dysfunction‐associated steatotic liver disease, “MASH”, “Non‐alcoholic Fatty Liver Disease”, “Nonalcoholic Steatohepatitis”, “Diabetes Mellitus”, “Hypoglycemic Agents” and “Pharmacotherapy”. The full search strategy has been included in Data S1. Additionally, reference lists were manually checked to identify potentially eligible studies.

2.2. Study selection

Eligible studies were (randomized) controlled trials or non‐randomized single arm studies conducted in adult patients with MASLD and T2DM on pharmacological diabetes treatment. We excluded studies that reported inclusion of patients with a history of liver transplantation, diagnosed with other liver diseases or with secondary causes of steatosis (e.g. viral hepatitis, autoimmune hepatitis, hepatocellular carcinoma, alcoholic fatty liver disease), type 1 diabetes or other types of diabetes and pregnant individuals. The primary outcome of interest was reduction in hepatic steatosis based on either imaging or biopsy. Secondary outcomes of interest included changes in MASLD (assessed by biomarkers), hepatic fibrosis (assessed by liver biopsy, imaging or biomarkers) and change in HbA1c, weight and liver enzymes. Review papers were excluded. Studies were reviewed and included by the authors independently (LK, LM, AB) and discrepancies were resolved through discussion.

2.3. Data extraction

Data from included studies was extracted using standardized templates. We registered study characteristics, interventions, measurement method, patient population characteristics and outcomes measured by imaging, scores or histology.

2.4. Quality assessment

The included studies were assessed for quality using Cochrane's Handbook Risk of Bias Tool by the authors. The Revised Cochrane risk‐of‐bias tool for randomized trials (RoB2) was used for the included randomized clinical trials. This tool focuses on different domains of bias (outcome data, randomization process, intervention and reporting) formulating a conclusion about methodological quality of the study evaluated. 18 Single arm studies were assessed on risk of bias using the Risk of Bias in Non‐randomized studies of interventions (ROBINS‐I) assessment tools. 19

2.5. Data analysis

Reduction of MASH was defined as improvement in hepatic steatosis based on imaging or biopsy in the measuring scale used in the reported article. Improvement of secondary outcomes was defined as improvement (change) of the assessed biomarkers. Improvement of hepatic fibrosis was defined as an improvement in the ratio, score or index as used in the specific study or as non‐worsening of the fibrosis. Total primary and secondary results on MASH improvement were summarized in a narrative overview. Due to expected heterogeneity in study design and study population pooled effect estimates were not calculated.

3. RESULTS

3.1. Study selection

In total 1748 articles were screened for eligibility. After checking for duplicates, articles were screened on abstract only (Figure 1). Most articles were excluded on subject and research design. Reviews and in‐vitro experiments were excluded. 117 articles were screened full text. After detailed review, 52 full‐text papers fulfilled the inclusion criteria. One trial included both, patients with and without T2DM and reported combined outcome measurements. 20 Two trials reported on the same cohort but used two different interventions. 21 , 22 Another two trials used the same cohort, but the second trial combined the treatment of the first trial and did a follow up of another 24 weeks. 23 , 24

FIGURE 1.

FIGURE 1

Flowchart summarizing the literature search and study selection process. DM, diabetic Mellitus; NAFLD, non‐alcoholic fatty liver disease.

3.2. Methodological quality

The three reviewers agreed on 52 articles until January 2025. All 52 studies fulfilled the mandatory criteria. Median quality was moderate (as shown in Data S1). Interestingly, different studies were not designed to investigate the research question. D2 and D5 in the ROBINS‐2 assessment were therefore scored ‘some concerns.’ In the studies evaluated with ROBINS D1 and D6 were scored moderate, due to differences in trial design.

3.3. Overall study characteristics

The number of included patients per study ranged from 9 to 50.742 and most patients were male. Data was collected from 64.708 patients in total. Patients differed in previous treatments and on‐treatment medication. Mostly, Fibroscan™, HR‐MRI, CT and biopsy were used to evaluate the degree of hepatic steatosis. The duration of the treatment periods ranged from 5 to 125 weeks. Detailed baseline characteristics are reported in Table 1. Outcomes of the different treatment modalities are reported in Tables 2 and 3. An overview of the different agents and their results is reported in Table 4. Figure 2 depicts a schematic picture of the various stages of disease progression where the different agents act to mitigate progression.

TABLE 1.

Baseline characteristics of included studies.

Author, Year, Reference Study type Groups Dosage Patients (n) Study length (weeks) Female (%) Mean BMI (kg/m2) Diabetes duration (years) Previous treatment HbA1 (%) Histology diagnose NASH (%) Imaging AST (U/L) ALT (U/L)
TZD

Lee Y 2017 26

Non‐randomized, open label, single arm Lobeglitazone 0.5 mg qd 43 24 35 27.5 Drug‐free/naive/metformin 7.4

Fibroscan

31.7 43.7

Cusi K 2016 27

Single‐center, parallel‐group, randomized, placebo‐controlled study

A: pioglitazone

B: placebo

45 mg qd

50 (24 # )

51 (28 # )

72

28

31

34.3

34.5

Metformin, sulfonylureas, insulin

6.3

6.4

42

45

H‐MRS

47

43

62

57

Omer Z 2010 28

Randomized, single‐center study

A:metformin

B:rosiglitazone

C:metformin and rosiglitazone

1700 mg/d

4 mg/d

1700 mg/d, 4 mg/d

22

20

22

48

32

55

50

30.8

28.4

32.5

5.8

6.0

6.9

100

100

100

46.1

53.8

51.4

63.1

64.9

72.5

Belfort R 2006 29 Randomized, double‐blinded, placebo‐controlled study

A: pioglitazone

B: placebo

45 mg qd

26

21

24

54

67

33.5

32.9

6.2

6.2

100

100

H‐MRS

47

42

67

61

Bril F 2018 30 Prospective randomized study

A: pioglitazone

B: placebo

45 mg qd

52 72 29 34.4 6.9 100 H‐MRS 53 71

TZD/SGLT‐2 inhibitor

Hooshmand Gharabagh L

2024 32

Open label, randomized clinical trial

A: min 1500 metformin + empagliflozin

B: min 1500 mg metformin + pioglitazone

A:10 mg qd

B: 30 mg qd

32

30

24

43.3

40.0

31.23

28.48

No SLGT2‐i, thiazolidinedione, stable dose of metformin for 3 months

8.73

8.82

Ultrasound +fibroscan

22.90

20.26

27.60

24.73

Yoneda M

2021 23

Open‐label, prospective, single center, randomized clinical trial

A: tofogliflozin

B: pioglitazone

20 mg qd

15‐30 mg qd

21

19

24

38.1

57.9

29.4

30.8

No other SGLT2, thiazolidinedione, insulin, GLP‐1 agonist or Vitamin E

7.22

7.06

MRI‐PDFF

54.0

64.0

84.0

79.3

Yoneda M

2022 24

Open‐label, prospective, single center, randomized clinical trial

A: tofogliflozin

B: pioglitazone, followed by combination therapy

20 mg qd

15‐30 mg qd

20

12

48

40.0

50.0

29.6

31.5

Other SGLT2, thiazolidinedione, insulin, GLP‐1 agonist

7.24

7.33

MRI‐PDFF

53.0

70.0

82.2

82.2

Ito D 2017 31 Randomized open‐label, active‐controlled trial

A: pioglitazone

B: ipragliflozin

30 mg qd

50 mg qd

34

32

24

47

56

29.9

30.7

9.5

8.7

Metformin/DPP4‐inhibitor/sulfonylurea/insulin

8.3

8.5

CT‐scan

43.3

39.7

53.1

57.4

Cho 2021 32

Randomized, open‐label, parallel group trial

A: pioglitazone

B: dapagliflazone after pioglitazone

30 mg qd

5 mg qd

26

27

24

50

44.4

Pioglitazone, sulfonylurea, insulin, DDP4, glinide

6.9

6.8

23.6

23.0

23.7

23.1

Kinoshita T 2020 33 Prospective randomized open label study

A: dapagliflozine

B: glimepiride

C: pioglitazone

5 mg qd

0.9 mg qd $

17.3 mg qd$

32

33

33

28

53.1

54.5

54.5

29.5

28.4

28.7

6.6

7.2

7.9

Glinide, DPP4, metformin, GLP‐1

7.4

7.6

7.4

CT‐scan

38.8

32.3

34.1

50.3

45.3

46.1

Khaliq A

2024 43

Prospective, randomized, double‐blind placebo‐contolled interventional stdy

A: Ertugliflozin

B: pioglitzone

C: placebo

15 mg qd

30 mg qd

65

65

65

24

16.6

16.6

21.6

31.8

30.7

30.1

Not mentioned

7.2

7.4

7.0

Ultrasound

98.5

90.0

95.5

86.6

96

95

Aghajanpoor M

2024 42

Randomized clinical trial

A: pioglitazone

B: pioglitazone + empagliflozin

15‐30 mg qd

15‐30 mg qd + 10 mg

42

43

24

52.4

48.8

25.6

29.4

No pioglitazone, vitamin E, empagliflozin

7.75

10.05

Ultrasound

26.8

26.9

30

32

TZD/DPP‐4 inhibitor

Han E

2022 40

Double‐blinde, active‐controlled, randomized, phase IV clinical trial A: evogliptin: pioglitazone

5 mg qd

15 mg qd

25

26

24

20.0

50.0

28.76

28.46

5.08

4.12

Metformin

7.16

7.19

MRI‐PDFF

44.00

41.88

58.52

66.00

GLP‐1‐agonist

Guo W 2020 14

Open label, prospective randomized placebo‐controlled single center study

A: Llraglutide B: insulin glargine

C: placebo

1.8 mg qd

>10 IU qd

31

30

30

26

48

40

33

29.2

28.3

28.6

Metformin

7.5

7.4

7.4

H‐MRS

29.6

27.9

28.1

33.2

31.5

30.5

Liu L 2020 16 Open‐label, randomized, controlled, parallel‐group, multicentre clinical trial

A: exenatide bid

B: insulin glargine *

10 μg bid

35

36

24

46

47

28.5

27.8

8.32

8.58

H‐MRS

31.3

25.1

42.7

32.8

Newsome PN 2021 17

Double‐blind, randomized, placebo controlled

A: semaglutide

B: semaglutide

C: semaglutide

D: placebo

0.1 mg qd

0.2 mg qd

0.4 mg qd

80

78

82

80

72

64

67

57

55

36.1

35.6

35.2

36.1

7.4

7.2

7.2

7.3

100

100

100

100

Fibroscan

44

43

44

42

55

53

54

55

Feng W 2017 18

open‐label prospective randomized trial using a parallel design

A: liraglutide

B: gliclazide

C: metformin

1.8 mg qd

120 mg qd

1000 mg bid

29

29

29

24

28

31

34

28.1

27.9

26.8

≥ 3 months drug naivety

8.91

9.03

9.36

Ultrasound

31.22

28.45

34.09

49.73

44.99

51.01

Armstrong MJ 2016 15

multicenter, double‐blindrandomized, study

A: liraglutide

B: placebo

1.8 mg qd

26

26

48

31

50

34.2

37.7

metformin, sulfonylurea

5.9

6.0

26

26

51

51

77

66

Eguchi Y 2015 19 open label non‐randomized

A: liraglutide

0.9 mg qd

19

24

31.6

6.5

100

CT‐scan 46.9 59.7

Shao N 2014 20

open‐label randomized

A: exenatide and glargine insulin*

B: insulin glargine and insulin aspart *

10 μg bid

30

30

12

50

53

30.6

30.29

7.68

7.59

Ultrasound

125

122

170

164

Fan H 2013 21 Open label

A: exenatide

B: metformin

10 μg bid

2 g/d

49

68

12

43

44

28

27

8.14

8.09

Ultrasound

35.9

34.3

65.7

65.8

Kuchay 2020 22 Open label, randomized controlled trial

A: dulaglutide

B: control

1.5 mg qw

standard care

27

25

24

28

31

29.6

29.9

4.9

5.7

metformine, DDP4, sulfonylurea

8.4

8.4

MRI‐PDFF/Fibroscan

49.9

46.1

70.1

68.1

Jiang X

2024 30

Randomized, double blind, controlled trial

A: metformin

B: metformin + exenatide

2d 500 mg qd

2d 500 mg + 2d 5mcg qd

64

64

24

42.19

39.06

25.41

25.44

60.93

61.05

59.36

59.84

Volpe S

2022 71

Prospective, single‐arm, real life study Semaglutide 0.25 up to 1 mg qw 48 52 45.8 38.8 6 metformin, and no GLP‐1a, SGLT2i, insulin or pioglitazone 7.0 ultrasound 28.2 43.7

Parker V

2023 70

Two‐part, randomized phase 2a trial

A: cotadutide

B: placebo

C: liraglutide

100 – 300mcg qd

placebo

part B:

cotadutide 30–300 mcg qd

B: placebo

C: liraglutide 0.6–1.8 mg qd

9

11

10

5

33.0

18.0

40.0

31.9

30.8

30.2

8.1

7.0

9.5

6.8

7.1

6.8

MRI‐PDFF

21.0

21.0

17.5

26.9

26.9

23.4

Arai T

2024 72

Single‐arm, multicentre, preospective study A: oral semaglutide A: 3, 7 or 14 mg qw 80 48 57 29.5 No initiation of antidiabetic/ antidyslipidaemic medication 12 weeks before start trial 6.9 Biopsy proven or ultrasound proven Biopsy proven or ultrasound proven 42 62
TZD/GLP‐1
Zhang LY 2020 24 open label, prospective, dubbel‐blind, randomized

A; liraglutide

B: pioglitazone

1.2 mg qd

30 mg qd

30

30

24

57

50

27.6

27.1

metformin

8.1

7.1

H‐MRS

3.5

3.5

3.4

3.6

DDP4‐inhibitor/GLP‐1‐agonist

Yan J 2019 25 Open‐label, active‐Controlled, parallel‐group multicenter study

A: liraglutide B: sitagliptin

C: Insulin glargine

1.8 mg qd

100 mg qd

>0.2/kg/d

24

27

24

26

29

22

42

30.1

29.7

29.6

3.3

4.3

5.8

metformin

7.8

7.6

7.7

MRI‐PDFF

31.1

34.4

33.2

43.2

46.0

39.5

SGLT2‐inhibitor

Inoue M 2019 34

Pilot, prospective, non‐randomized, open‐label single‐arm study Canagliflozin 100 mg qd 20 52 45 31.5 7.4 Insulin/sulfonylurea/thiazolidine/biguanide/DPP4 inhibitors 8.7 BIA/MRI 52 80
Shimizu M 2019 35 Prospective, randomized, open‐label, blinded endpoint study

A: dapagliflozin

B: control

5 mg qd

Standard care

33

24

24

42

38

27.6

28.3

Oral antidiabetic agents 1–3/ insulin

8

7.7

BIA/FibroScan

28.0

26.0

38.0

33.0

Eriksson JW 2018 36 Randomized placebo‐controlled double‐blind double‐dummy four‐armed parallel group trial

A: dapagliflozin

B: OM‐3CA

C: dapagliflozin and OM‐3CA

D: Placebo

10 mg qd

4 g qd

10 mg, 4 g qd

19

15

20

19

12

24

45

32

19

30.5

33.0

31.1

30.3

6.7

6.3

8.5

6.5

Metformin/sulfonylurea/naïve

7.38

7.38

7.5

7.44

MRI‐PDFF

31

31

30

29

40

38

37

34

Kuchay MS 2018 23 Prospective, open‐label, randomized clinical study

A: Empagliflozin

B: control

10 mg qd standard care

22

20

20

41.1

40.0

30.0

29.4

6.6

6.8

Metformin/DPP4‐inhibitors/sulfonylureas/insulin

9.0

9.1

MRI‐PDFF

44.6

45.3

64.3

65.3

Lai LL 2020 42 Single‐arm, open‐label, pilot study A: empagliflozin 25 mg qd 9 24 65.6 29.8 17 Others drugs than SGLT2‐inhibitors/TZD/GLP1‐agonist 7.1 100 HepaFat–scan (MRI) 29 37
Sumida Y 2019 37 Prospective, single‐arm trial A: luseogliflozin 2.5 mg qd 40 24 30 27.76 8.9 Metformin/αgi/dpp/dpp4‐inhibitors/none 7.29 MRI‐HFF 40.7 54.7
Tobita H 2017 57 Single‐arm non‐randomized, open‐label study Dapagliflozin 5 mg qd 16 24 45.0 31 DPP4i, 14 SU 1 7.4 100 52.0 59.0

Hussain M

2021 59

Randomized controlled trial

A: dapagliflozin

B: placebo + life style modifications

5‐10 mg qd

placebo

75

75

12

37.0

34.5

29.5

31.5

Glimepiride

7.5

8.2

Ultrasound

74

71

69

68

Shi M

2023 31

Prospective, open‐label, randomized controlled trial

A: dapagliflozin + metformin

B: metformin + other treatment

10 mg qd

42

42

24

32.5

28.9

31.1

30.4

Metformin

8.38

8.66

MRI‐PDFF

26.4

27.8

39.6

44.4

Phrueksotsai S 2021 61 Double‐blinded, placebo‐controlled, randomized, single‐center study

A: dapagliflozin

B: placebo

10 mg qd

placebo

20

20

12

72.2

65.0

29.6

28.8

4.5

5.5

stable dose of oral medication for at least 12 weeks, no use of weight loss medication or vitamin E

8.2

7.8

Non‐contrast CT‐abdomen

25.5

22.0

35.0

27.0

Takahashi H

2022 51

Multicenter, open‐label, randomized controlled trial

A: ipragliflozin

B: lifestyle modifications and diet, antidiabetic drugs (exc. SGLT2s, pioglitazone, GLP1‐agonists or insulin)

A: 50 mg qd

27

28

72

37.5

46.2

29.9

28.8

No SGLT2‐i, pioglitazone, GLP1‐agonists or insulin

6.5

6.8

100

43.5

41.5

57.0

52.0

Borisov A

2023 60

Post‐hoc analysis of 2 large double‐blind randomized controlled trials

A: canagliflozin

B: placebo

100 or 300 mg qd

placebo

5787

4344

125 35.8 13.5 Other diabetic medication 8.2 23.0 26.0

Cusi K

2019 62

Double‐blind, parallel‐group, placebo‐controlled trial

A: canagliflozin

B: placebo

300 mg qd

placebo

26

30

24

38.0

30.0

32.2

31.0

Metformin monotherapy of metformin + DPP4‐i with a stable dose for at least 12 weeks prior to screening

7.6

7.7

H‐MRS

22.0

27.0

23.0

35.0

Kahl S

2020 58

Randomized, parallel‐group, double blind phase 4 trial

A: empagliflozin

B: placebo

25 mg qd

placebo

42

42

24

31.0

31.0

32.1

32.4

3

3.5

No diabetic treatment or washout of one month

6.8

6.7

H‐MRS

25.0

25.0

32.0

36.0

Bellanti F

2022 52

Obervational pilat study

A: SGLT2‐i + metformin

B: DPP‐4 or thiazolidinediones + metformin

26

26

26

42.3

42.3

34.8

34.5

Metformin monotherapy

9.24

8.73

48.5

54.7

49.6

65.0

Elhini S

2022 54

Randomized, double‐blinded clinical study

A: empagliflozin

B: ursodeoxycholic acid

C: placebo

A: 25 mg qd

B: 250 mg 2qd

89

87

80

26

66.25

68.75

68.75

32.57

33.52

33.90

Use of sulfonylurea for at least 6 months

8.97

8.54

7.98

MRI‐PDFF

29.5

33.39

25.85

28.75

31.60

26.05

DPP4‐inhibitor/SGT‐2 inhibitor
Hiruma S 2023 47 Randomized, controlled trial

A: Empagliflozin

B: sitagliptin

10 mg qd

100 mg qd

23

21

12

26.1

31.6

30.6

28.6

4.6

3.3

Sulphonureum, glinides, a‐glucosidase inhibitors

7.1

7.2

100 H‐MRS

37.0

37.7

59.2

60.6

Kim J 2022 46 Matched cohort

A: SGLT2i

B: DPP4i

25,371

25,371

104

46.22

55.51

27.37

27.38

5.20

5.17

other treatment not mentioned

24.10

24.10

30.93

30.99

DPP4‐inhibitor
Yilmaz Y 2012 38 Open‐label, single‐arm observational pilot study

A: sitagliptin

100 mg qd

15 52 53.3 30.7 no other DM drugs 6.7 100 46 30
Cui J 2016 39 Randomized, double‐blind, allocation‐concealed, placebo‐controlled trial

A: sitagliptin

B: placebo

100 mg qd

25

25

24

48

68

31.9

31.7

6.1

6.2

MRI‐PDFF

28.0

29.0

43.0

40.0

Komorizono 2020 40 Randomized open blinded endpoint trial

A: linalgiptine and metformine

B: metformine

5 mg qd, 750 mg qd

1500 mg bid or tid

24

25

52

58.3

64

29.7

27.9

no other DM drugs

7.0

7.2

CT‐HU/ ultrasound

35.5

33.1

50.9

41.1

Wang X

2022 29

Prospective, single‐center, open‐label comparative study

A: control

B: sitagliptin

C: metformin

D: metformin + sitagliptin

0

100 mg qd

3× 500 mg qd

100 mg + 3× 500 mg qd

14

17

17

20

24

42.8

41.2

47.1

55.0

24.06

25.41

26.46

26.07

8.08

7.93

8.60

7.83

0.0 HD‐MRI

‐21.76

19.25

22.00

26.81

24.00

25.45

GLP‐1/GIP

Gastaldelli A

2022 66

Randomized, open label, phase 3 trial

A: Tirzepatide–5 mg

‐10 mg

‐15 mg

B: Insuline degludec

5 mg qd

10 mg qd

15 mg qd

71

79

72

74

52

38

48

35

46

34.5

33.1

33.4

33.0

7.9

9.4

8.7

7.0

Metformin alone or with SGLT2‐i

8.27

8.41

8.15

8.14

MRI‐PDFF

22.8

21.8

22.5

21.1

32.3

29.5

30.0

27.4

Abbreviations: αGI, α‐glucosidase inhibitors; AST, aspartate aminotransferase; ALT, alanine aminotransferase; BIA, bioelectrical impedance analysis; BMI, body mass index; CT, computed tomography; D, day; DPP4, dipeptidyl peptidase‐4; GLP1, glucagon‐like peptide‐1; HbA1c, haemoglobin A1c; H‐MRS, proton magnetic resonance spectroscopy; MRI‐HFF, magnetic resonance imaging hepatic fat fraction; MRI‐PDFF, magnetic resonance imaging‐estimated proton density fat fraction; OM‐3CA, n‐3 carboxylic acids; SGLT‐2, sodium‐glucose co‐transporter‐2; SU, sulphonylurea derivates; TZD, thiazolidinedione.

*

Dose depends on glucose level.

#

Patients with diabetes type 2.

Baseline characteristics were given for whole study population.

On natural logaritmic scale.

$

Mean final dose.

TABLE 2.

Outcome of included studies.

Author, Year, Reference Groups Δ Weight (kg) Δ HbA1 (%) Δ AST (U/L) Δ ALT (U/L) Δ ALT (%) Δ SAT (cm2) Δ SAT (L) Δ AT (cm2) Δ VAT (L) Δ VFA (cm2) Δ IHF (%) Δ CAP (dB/m) Δ LSM (kPa) Δ HFF (%) Δ Liver PDFF (%) Δ Liver fat content (%) L/S ratio
TZD

Lee YH 2017 34

Lobeglitazone 1.4* −0.8* −4.5* 13.3** 15.6** −0.5

Cusi K 2016 35

A: pioglitazone

B: placebo ∞

0.3#

−1.2

−0.4

−0.2

−18#

−5

‐35ₓ

−13

‐12ₓ

−4

Omer Z 2010 27

A: metformin

B: rosiglitazone

C: metformin and rosiglitazone

0.0

−0.2

0.0

Belfort 2006 36

A: pioglitazone

B: placebo

2.5

−0.5

−0.7 **#

−0.1

−19**#

−9

−39**ₓ

−21

−12**ₓ

0

Bril F 2018 37

A: pioglitazone

B: placebo

2.9#

−0.6

−0.9#

−0.3

−32#

−5

−50#

−17

TZD/SGLT‐2 inhibitor
Hooshmand Gharabagh L 2024 32

A: min 1500 mg metformin + empagliflozin

B: min 1500 mg metformin + pioglitazone

−5.78**•

0.93*

−1.84**–1.79** −8.05**–4.43** −8.34*–7.33** −1.27**–1.41**
Yoneda M 2021 23

A: tofogliflozin

B: pioglitazone

−2.83*

1.39*

−0.4*–0.69** −15.8*–27.9* −23.3*–33.8** −0.14–0.34*

−4.12*

–7.54**

Yoneda M 2022 24

A: tofogliflozin

B: pioglitazone, followed by combination therapy

−3.25*

2.46*

−0.79

−0.36*

–0.73*

–0.80**

−13.8*–31.2*

–25.2**

−19.3*–34.0** 35.7**

−0.11–0.43*

–0.40**

−3.38*–5.56**–5.98**
Ito D 2017 38

A: pioglitazone

B: ipragliflozin

0.9*

−2.3*

−1.11*

−0.94*

−11.6*

−12.6*

−17.5*

−20.0*

−2.6

−26.1*●

0.21*

0.22*

Cho 2021 39

A: pioglitazone

B:dapagliflozine

0.5**

−4.2**

0.2

0.2

−0.4

−1.6

−1.4

−1.8

Kinoshita T 2020 33

A:dapagliflozine

B: glimepiride

C: pioglitazon

−2.8* ● $

1.4*

2.5*

−0.52*

−0.30

−0.48*

−8.7*

0.3∆

−7.1*

−12.8*

−1.8∆

−15.1

−19.4*●^

6.8

2.6

0.17*∆’

0.03!

0.22*

Khaliq A

2024 43

A: Ertugliflozin

B: pioglitzone

C: placebo

−11.66**

−1.1*#

−0.6

1.0

−53**

−49.5*

4.0

52.2**

−20.2*

5.2

Aghajanpoor M

2024 42

A: Pioglitazone

B: pioglitazone + empagliflozin

‐1.43

−1.54

−7.3

−6.4

−9.9

−7.8

TZD/DPP‐4 inhibitor

Han E

2022 40

A: evogliptin

B: pioglitazone

−0.30∆

2.50

−0.31

–0.48

−2.00∆–12.00

−6.0∆

–22.0

0.25∆ 14.05

4.75

1.45

−1.69

−6.02**∆

GLP‐1‐agonist

Guo W 2020 63

A:liraglutide

B: insulin glargine

C: placebo

−5.1*#∆

−0.9

−0.6

−0.7

−0.5

−0.1

−5.3*

−2.3

−1.8

−6.0*#∆

−1.8

0.0

−36*#∆

−24.5*#

−7.1

−47*#∆

−16.6*#

−3.5

−6.3*#

−3.4

−0.1

Liu L 2020 64

A: exenatide

B: insulin glargine

−5.0 **

−1.25

−2.28**

−1.82**

−12.3**

‐2.66

−21.5**

‐7.66**

−28.4**

2.59

−43.5**∆

‐8.3

−17.55**

−10.49**

Newsome PN 2021 ∞ 20

A: semaglutide

B: semaglutide

C: semaglutide

D: placebo

−3.24

−6.01

−9.11

−1.91

−0.73

−0.98

−1.05

−0.02

−14.05

−15.19

−21.4

−5.76

−20.72

−21.32

−30.95

−11.22

−2.36

−4.75

−3.82

2.14

Feng W 2017 25

A: liragutide

B: gliclazide

C: metformin

‐5.6**

−0.37

−3.58**

−3.01**

−2.56**

−3.33**

−7.2**

−4.73**

‐11.45**

−22.3**

−11.63**

−22.57**

−23.6**

−13.4**

−16.69**

Armstrong MJ 2016

69

A: liraglutide

B: placebo

−5.3#

−0.6

−0.53#

0.00

−15.8

−8.6

−26.6

−10.2

Eguchi Y 2015 69

A: liraglutide

−0.6**

‐17.4*

−25.6 *

−19.8*

0.12*

Shao N 2014 65

A: exenatide and insulin glargine

B: insulin glargine and insulin aspart

−3.3**

−7.8**

−1.42 **

−1.31**

−92.9**

−79.0*

−127**

−96.6**

Fan H 2013

27

A: exenatide

B: metformin

−4.16

−1.98

−0.91

−0.89

−7.89

−5.11

−27.3

−12.85

Kuchay 2020 21

A: dulglutide

B: control

−4.3∆

−2.0

−1.6

−1.3

−16.6

−7.3

−26.4

−13.9

−5.8

−2.3

Jiang X 2024 30

A: metformin

B: metformin + exenatide

−10.66

‐18.21•

−12.32

−19.23•

Volpe S 2022 71 Semaglutide ‐10.78* −8.9* −15.8* −1.6*

Parker V

2023 70

A: cotadutide

B: placebo

C: liraglutide

−2.5

‐2.8

−4.1# ∆

‐1.8

Arai T

2024 72

Oral semaglutide −4.0** −0.9** −15.0** −27** −18.0* −0.7*
TZD/GLP‐1
Zhang LY 2020 41

A; liraglutide

B: pioglitazone

−10.1*£

1.1

−1*

−0.6*

−0.4£

−0.2£

−0.4£

0.0£

−4.0*∆

−1.5

DDP4‐inhibitor/GLP‐1‐agonist
Yan J 2019 48

A: liraglutide

B: sitagliptin

C: Insulin glargine

−3.6*†

−1.7*

−1.2

−1.0**

−1.0*

−0.7*

−1.8

−8.7*

−2.9

−5.2

−11.2*

−0.8

−28.6*†

−9.4

18.6

−20.9*†

−13.6*

9.5

−4.0**†

−3.8*

−0.8

SGLT2‐inhibitor
Inoue M 2019 56 Canagliflozin −2.9** −1 * −9* −21* −5.5*
Shimizu M 2019 50

A: dapagliflozin

B: control

−2.9**∆

−0.6

−6.6**

−7.49

−0.5*

−2.4

−11.5**

−1.0

−11.2*

1.3

−7.3**

−5.7

−24.3*∆

5.3

−1.48

0.45

Eriksson JW 2018 53

A: dapagliflozin

B: OM‐3CA

C: dapagliflozin +OM‐3CA

D: placebo

−2.44#

−0.16

−2.16#

−0.27

−0.63#

0.13

−0.45

−0.09

−4#

5

1

−1

−8#

6

0.06

−0.2

−2.23

−3.15

−3.15#

−0.59

Kuchay MS 2018 22

A: empagliflozin

B: control

−3.3*

−1.6*

−1.8**

−2.0**

−8.4*

−0.7

−14.6*∆

−3.7

−4.9**●

−0.9

Lai LL 2020 55 A: empagliflozin −0.5 −4 −8 −7.8*
Sumida Y 2019 49 A: luseogliflozin −1.43** −0.29** −8.8** −12.3** −5.8**
Tobita H 2017 57 Dapagliflozin −3.8* −3.7* −26* −29*
Hussain M 2021 59

A: dapagliflozin

B: placebo + life style modifications

−6#

–0.5

−3#

–0.6

−27#

–6

−17#

4

Shi M 2023 31

A: dapagliflozin + metformin

B: metformin + other treatment

−5.6**•

0.3

−1.97**

–2.03**

−8.4**

–3.58

−12.09**•

–4.07

−4.18**•

0.13

Phrueksotsai S 2021 61

A: dapagliflozin

B: placebo

−2.3**ₓ

–0.1

−1.3**#

–0.2

−3.5*

0

−4.5*#

–1

Takahashi H 2022 51

A: ipragliflozin

B: lifestyle modifications, antidiabetic drugs (exc. SGLT2s, pioglitazone, GLP1‐agonists)

7.1

0.9

−0.5*

–0.2

−10

5

−13

–0.5

−21

0

10

–2

Borisov A 2023 60

A: canagliflozin

B: placebo

Cusi K 2019 62

A: canagliflozin

B: placebo

−5.5# (%)

–2.1 (%)

−0.7ₓ

0.1

−3

–1

−6.9#

–3.8

Kahl S 2019 58

A: empagliflozin

B: placebo

−2.7ₓ

–0.1

−0.06

0.13

−20

–13

−0.251

0.0 39

−1.8#

–0

Elhini S

2022 54

A: empagliflozin

B: ursodeoxycholic acid

C: placebo

−1.72**

−1.14**

−0.61**

−11.50*

−15.24*

3.40*

−13.00**

−12.1**

4.35

−8.73**∆

−5.71***

−1.99**

DPP4‐inhibitor/SGLT‐2 inhibitor
Hiruma S 2023 47

A: Empagliflozin

B: sitagliptin

−1.8*∆

–0.2

−0.6**

–0.6**

−7.3*

–2.2

−13.3*

–10.1

−5.2∆

–1.9

Kim J 2022 46

A: SGLT2i

B: DPP4i

−2.3•

–0.8

−4.7 •

–2.6

DPP4‐inhibitor
Yilmaz Y 2012 44 A: sitagliptin −0.2 −16* −25*
Cui J 2016 45

A: sitagliptin

B: placebo

0.2

−0.2

0

0.1

−1

−5

−9

−11.5

−8.4

−13.9

Komorizono 2020 28

A: linagliptine and metformine

B:metformine

−0.4

−1.6*

−0.2

−0.2

−1.1

−1.2

−0.2

−0.2

Wang X 2022 29

A: control

B: sitagliptin

C: metformin D: metformin + sitagliptin

0.08–0.98* !

0.22–0.79+

0.24!

1.95

–0.86

0.58!

–2*

–0.31

−6.73

–19.77–36.16*–23.18

GLP‐1/GIP
Gastaldelli A 2022 66

A: Tirzepatide–5 mg

–10 mg

‐15 mg

B: Insuline degludec

−1.4**

‐2.25**

−2.05**

0.63*

−1.10**

−1.53** ●

−1.65** ●

0.38*

−6.35**

−8.21** ●

−7.78** ●

−3.19**

Note: Data are mean. *p <.05 for comparison before vs. after treatment within groups. **p <.001 comparison before vs. after treatment within groups.∆p <.05 are for comparison of change between groups (A vs. B). ‘p <.05 are for comparison of change between groups (A vs. C). !p <.05 are for comparison of change between groups (B vs. C); p <.05 are for comparison of change between groups (B vs. D). + p <.05 are for comparison of change between groups (C vs. D).^p <.001 are for comparison of change between groups (A vs. C). ●p <.001 are for comparison of change between groups (A vs. B). $p <.001 are for comparison of change between groups (B vs. C). ₓ p < 0.001 for comparison before vs. after treatment between groups (A or B or C vs. placebo). † p <.05 for comparison before vs. after treatment among groups. ∞ p values only between groups, data of diabetics and non‐diabetics combined. £logaritmic scale, #p <.05 for comparison before vs. after treatment between groups (A or B or C vs. placebo).

Abbreviations: AST, aspartate aminotransferase; ALT, alanine aminotransferase; CAP, controlled attenuation parameter; DPP4, dipeptidyl peptidase‐4; GLP1, glucagon‐like peptide‐1;HbA1c, haemoglobin A1c; HHF, hepatic fat fraction; IHCL, intrahepatic content of lipid; IHF, intrahepatic fat; LS, liver stiffness measurement; L/S, liver‐to‐spleen; OM‐3CA, n‐3 carboxylic acids; SAT, subcutaneous adipose tissue; SGLT‐2, sodium‐glucose co‐transporter‐2; TZD, thiazolidinedione; VAT, visceral adipose tissue; VFA, visceral fat area.

TABLE 3.

Outcome of studies, non‐invasive and invasive measurements.

Author, Year, Reference Groups NFS FIB‐4 index NAFIC score NASH score improvement (%) Reversal rate Severity FL Histology improvement in NAS Resolution of NASH without worsening of fibrosis (%) Improvement in liver fibrosis and no worsening of NASH (%) Fibrosis improvement (%)
TZD
Cusi K 2016 35

A: pioglitazone

B: placebo

29%#∞

9%

51#

19

20

13

Omer Z 2010 27

A: metformin

B: rosiglitazoneC: metformin and rosiglitazone

0.7 score

‐2.6 score*

−3.9 score*

Belfort R 2006 36

A: pioglitazone

B: placebo

43%**#∞

0%

46*

33

Bril F 2018 37

A: pioglitazone

B: placebo

70*#

24

60*#

16

−0.5^#

0.2a

Ito D 2017 38

A: pioglitazone

B: ipragliflozin

−0.16*

−0.22*

Cho 2021 39

A: pioglitazone

B: dapagliflozin

−0.03

−0.17*#

TZD/SGLT‐2 inhibitor
Yoneda M 2021 23

A: tofogliflozin

B: pioglitazone

−0.15

‐0.38

Khaliq A

2024 43

A: Ertugliflozin

B: pioglitazone

C: placebo

−0.78*

−0.59*

0.10

Aghajanpoor M

2024 42

A: pioglitazone

B: pioglitazone + empagliflozin

−0.24

−0.32’

−0.16

−0.19*

GLP‐1‐agonist

Liu L 2020 64

A: exenatide

B: insulin glargine

−0.10*

0.13

Newsome PN 2021 20

A: semaglutide

B: semaglutide

C: semaglutide

D: placebo

40.8#

37.3#

57.1∆

18.0

40.8

31.4

40.8

26.0

Armstrong MJ 2016 68

A: liraglutide

B: placebo

74%∞

64%

39#

9

26∞

14

Eguchi Y 2015 69 A: liraglutide 0.2 80%* 70%* 60*
Shao N 2014 65

A: exenatide and insulin glargine

B: insulin glargine and insulin aspart

93.6**

66.7

Arai T

2024 72

Oral semaglutide 0.21**
DDP4‐inhibitor/GLP‐1‐agonist
Yan J 2019 48

A: liraglutide B: sitagliptin

C: Insulin glargine

0.03

−0.07

0

0

−0.12

0

SGLT2‐inhibitor
Inoue M 2019 56 Canagliflozin 0.06 −0.05
Shimizu M 2019 50

A: dapagliflozin

B: control

0.12

−0.29

−0.05

0.06

−1.0

0

Lai LL 2020 55 A: empagliflozin 44† 75†
Sumida Y 2019 49 A: luseogliflozin −0.01

−0.11

Tobita H 2017 57 Dapagliflozin −0.24

Shi M

2023 31

A: dapagliflozin + metformin

B: metformin + other treatment

−0.14*–0.06
Takahashi H 2022 51

A: ipragliflozin

B: lifestyle modifications, antidiabetic drugs (exc. SGLT2s, pioglitazone, GLP1‐agonists)

66.7

27.3

57.1∆

16

Borisov A 2023 60

A: canagliflozin

B: placebo

−0.097#

− 0.047

‐0.04

–0.06

Elhini S 2022 54

A: empagliflozin

B: ursodeoxycholic acid

C: placebo

−1.00**

−1.11**

0.29

−0.34**

−0.55*

0.06

DPP4‐inhibitor/SGT‐2 inhibitor

Hiruma S

2023 47

A: Empagliflozin

B: sitagliptin

‐0.02

0.07

DPP4‐inhibitor
Yilmaz Y 2012 44 A: sitagliptin −1.14 score* −0.01
GLP‐1/ Glucagon receptor co‐agonist

Note: aHistological score of fibrosis. #p < 0.05 for comparison before vs. after treatment between groups (A or B or C vs. placebo). †No p‐value available. ∞p values only between groups, data of diabetics and non‐diabetics combined. *p <.05 for comparison before vs. after treatment within groups. **p <.001 for comparison before vs. after treatment within groups. ≥2 point reduction in NAS without worsening fibrosis improvement.for comparison before vs. after treatment between groups (A or B). ∆p < 0.001 for comparison before vs. after treatment between groups (A or B or C vs. placebo).

Abbreviations: DPP4, dipeptidyl peptidase‐4; FIB4‐index, The Fibrosis‐4 index; FL, fatty liver; GLP1, glucagon‐like peptide‐1; NAFLD, non‐alcoholic fatty liver disease; NFS, NAFLD fibrosis score; NAS, nonalcoholic fatty liver disease activity score; NASH, non‐alcoholic steatosis hepatis; OM‐3CA, n‐3 carboxylic acids; SGLT‐2, sodium‐glucose co‐transporter‐2; TZD, thiazolidinedione. p < 0.05 p < 0.05.

TABLE 4.

Outcome per agent/group.

Agent/Group Number of studies Change in weight Change in liver enzymes Reduction hepatic fat content (MRI) Histology improvement in NAS Histology improvement in fibrosis
Metformin 8 Variable results Variable results Significant decrease in fat content in one study in one study. No significant reduction in MASLD severity in the other studies. No improvement No improvement
Sulfonylurea derivates 2 Variable results Variable results One study showed improvement No biopsy proven studies No biopsy proven studies
Thiazolidinedione derivates and PPAR agonist 13 Weight gain in five studies Variable results Five studies showed significant reduction Improvement in NAS in four studies Improvement in fibrosis in one study
DPP4‐inhibitors 8 Variable results Variable results Significant reduction in one study, no reduction in two studies One biopsy proven study that showed improvement in NAS score No improvement in fibrosis, one biopsy proven study
SGLT2 inhibitors 25 Weight reduction in nineteen studies Improvement of liver enzymes in nineteen studies Significant improvement in fourteen studies Two biopsy proven studies, both showed improvement Two biopsy proven studies, both showed improvement
Insulin 5 No reduction No reduction Two studies showed change in fat content and two studies found no change No biopsy proven studies No biopsy proven studies
GLP1 receptor agonists 15 Weight reduction in eleven studies Significant improvement in ten studies Six studies looked into fat content and showed significant reduction Three biopsy proven studies. Two studies showed improvement in NAS score Three biopsy proven studies. One study showed improvement.
Tirzepatide 1 No information No information One study showed significant reduction No biopsy proven studies No biopsy proven studies

Note: This table describes the different treatment modalities and their effect on weight, liver enzymes, hepatic fat content, NAS score and fibrosis.

Abbreviations: DPP4, dipeptidyl peptidase‐4; SGLT‐2, sodium‐glucose co‐transporter‐2; GLP1, glucagon‐like peptide‐1; NAS, Nonalcoholic Fatty Liver Disease Activity Score; PPAR, Peroxisome proliferator‐activated receptor.

FIGURE 2.

FIGURE 2

Different agents and their effects on steatosis, MASH or fibrosis. Overview of the different treatment modalities and where they exert their function on the different stages of metabolic dysfunction‐associated liver disease. The TZD derivates/ PPAR agonists, SGLT2 inhibitors, GLP‐1 agonist seem to improve liver steatosis as well as MASH and fibrosis, whereas Tirzepatide improves steatosis and DDP4‐inhibiors improve MASH. Legend; TZD, Thiazolidinedione derivates; PPAR, Peroxisome proliferator‐activated receptor, DPP4, dipeptidyl peptidase‐4; SGLT‐2, sodium‐glucose co‐transporter‐2; GLP1, glucagon‐like peptide‐1.

3.4. Reported effects per medication group

3.4.1. Metformin

Six trials incorporated a treatment arm with metformin, 25 , 26 , 27 , 28 , 29 , 30 two trials used metformin plus another treatment as treatment arm. 31 , 32 Two trials used metformin as a reference group to evaluate the effect of GLP‐1 agonists, 25 , 26 one trial evaluated the effect of rosiglitazone versus metformin in combination with rosiglitazone or metformin only 27 and one trial used metformin as a reference group to evaluate the effect of DPP4. 28 One trial used liver biopsy as a reference. 27

The study of Feng et al. showed a significant decrease in intrahepatic fat content (IHF) assessed by ultrasound in 29 patients. 25 The other studies, including one biopsy proven study, did not show a significant reduction in MASLD severity. 26 , 27 , 28 No change in fibrosis was detected. 27 Variable results were found for change in Hb1Ac and weight.

3.4.2. Sulfonylurea derivatives (SU)

SU were evaluated in two trials, which were part of a multiple arm trial. 25 , 33 The study of Kinoshita et al., which included three treatment arms of dapagliflozin, pioglitazone and glimepiride was negative concerning the effects of glimepiride on L/S and VFA ratios. In addition, no significant reduction in body weight, HbA1c or transaminases were detected. However, in the study of Feng et al. an improvement in IHF was found in all treatment arms, including the one with gliclazide.

3.4.3. Thiazolidinedione (TZD) derivatives and peroxisome proliferator‐activated receptor (PPAR) agonists

In total 15 trials evaluated the effect of different TZD derivatives or PPAR agonists. 23 , 24 , 27 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 Two trials included comparison with placebo, one trial with metformin (with or without a combination of rosiglitazone) and the others with liraglutide, ipragliflozin, dapagliflozin, empagliflozin, tofogliflozin, ertugliflozin and evogliptin. 23 , 24 , 27 , 32 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 43 Therapy was continued from 24 to 72 weeks. One single arm trial was included with a treatment arm of lobeglitazide. 34 In the study of Kinoshita et al. three treatment arms were applied including two TZD's and one with a SGLT inhibitor. 33 In four studies liver histology as a reference was used. 27 , 35 , 36 , 37 In the studies of Cusi et al. and Omer et al. also pre‐diabetic patients (or with an impaired glucose intolerance) were included. 27 , 35

The studies reporting histological endpoints showed an ≥2 reduction in non‐alcoholic fatty liver disease activity score without worsening of the fibrosis, significantly more compared to the placebo arm. 27 , 35 , 37 In addition, in the study by Cusi et al. there was a significant reduction in fibrosis score. 35 The study of Omer et al. showed a significant reduction of the histological NAFLD score in the rosiglitazone arm. No significant change was seen in fibrosis score. 27 In the study of Belfort et al. a histological improvement in steatosis and inflammation was observed. 36

In eight other studies, TZDs showed improvement of MASLD, Fibrosis‐4 index for liver fibrosis (FIB4) and controlled attenuation parameter (CAP) scores. In the study of Zhang et al. no significant difference was found in the hepatic fat content or liver enzymes. In this study pioglitazone was compared to liraglutide. 41 In addition, in the study which compared dapagliflozin to pioglitazone no significant FIB4 reduction in the pioglitazone arm was found. 39 The trial by Han et al. compared evogliptin and pioglitazone showing significant improvement in hepatic fat fraction with pioglitazone. 40 The trial of Yoneda et al.comparing tofogliflozin and pioglitazone and the follow up trial which combined both therapies, also showed significant improvement in Liver PDFF with both therapies. 23 , 24

Interestingly, in the secondary outcomes no significant reduction in weight was seen and in six trials there was a significant weight gain (Table 2) in the treatment arm. 33 , 34 , 36 , 37 , 39 , 43 Also for other outcomes, for example in levels of transaminases and Hb1Ac, variable changes were reported. Ten trials reported a significant decrease of the Hb1Ac levels and four showed no significant change. 27 , 39 , 42 , 43 In three studies 33 , 39 , 41 no change of transaminases was reported; in six studies a reduction was seen. 27 , 36 , 37 , 38 , 42 , 43

3.4.4. SixDipeptidylpeptidase‐4(DPP4)‐inhibitors

Eight studies investigated the effect of DPP4‐inhibitors compared to placebo, metformin and insulin, liraglutide (GLP‐1) or SGLT2 inhibitors. 28 , 29 , 40 , 44 , 45 , 46 , 47 (Table 2) The single arm study of Yilmaz et al. included histologically characterized steatotic liver disease. 44 They reported a significant reduction in the NAFLD score without an improvement in the fibrosis grade. The two studies by Cui et al. and Komorizono et al. showed no significant improvement in measured hepatic fat content. 28 , 45 In the study of Yan et al. a significant reduction in MRI‐PDFF measurements were reported in the sitagliptin arm, but there was no difference in the liraglutide arm. 48

3.4.5. Sodium glucose cotransporter‐2 (SGLT2) inhibitors

Twenty‐five trials evaluated the use of SGLT2 inhibitors. Seven trials compared SGLT2 inhibitors to pioglitazone, 23 , 24 , 32 , 38 , 39 , 42 , 49 seven included a control arm (diabetic medication) 22 , 31 , 46 , 47 , 50 , 51 , 52 and four studies reported a multiple arm trial with pioglitazone, glimepiride, ursodeoxycholic acid or omega‐3 (n‐3) carboxylic acids (OM‐3CA) compared to placebo. 33 , 43 , 53 , 54 One trial combined empagliflozin with pioglitazone. 42 Four single arm trials were included. 49 , 55 , 56 , 57 Five trials compared SGLT‐2 inhibitors with placebo. 58 , 59 , 60 , 61 , 62 Therapy was continued for 12 to 125 weeks. Treatment arms differed in size from 9 to 50.742 patients. Only two single arm trials used histology, with biopsies pre‐and post‐treatment. 51 , 55

The study of Lai et al. showed a resolution of steatohepatitis in 44% of the patients treated with empagliflozin and improvement of fibrosis in 75%. 55 Interestingly, this study did not show a significant reduction in the secondary outcome measurements. The study of Takahashi et al. found a significant reduction in steatohepatitis and an improvement in fibrosis in the ipragliflozin group. 51

Different non‐invasive liver tests and imaging techniques (CAP, LSM, FIB4), liver fat content measurement with MRI and MRI‐proton density fat fraction (MRI‐PDFF) were used to study the effect of these compounds compared to standard care or placebo. Sixteen studies showed an improvement in MASLD severity compared to placebo or other trial arms (effects shown in Tables 2 and 3). In the single arm trial of Inoue et al. no significant reduction of the NAFLD score was detected (MRI). 56 Three studies found no significant reduction of the Hb1Ac levels or transaminases. 39 , 55 , 58

3.4.6. Insulin

Although no placebo‐controlled trials were found evaluating the effect of insulin on MASH, five trials did use treatment arms with insulin. 48 , 63 , 64 , 65 , 66 Insulin was compared to GLP1‐agonist, tirzepatide and DDP4‐inhibitors or in combination therapy. None of these studies included histological liver improvement.

In the study of Yan et al. no significant decrease in MRI‐PDFF or FIB4 score was found. In addition, the study of Shao et al. did not show a significant reduction in fatty liver content, body weight or transaminases. 48 , 65 The study of Guo et al. reported a significant decrease in intrahepatocellular lipids, but not in visceral adipose tissue or subcutaneous adipose tissue. In addition, no significant reductions in Hb1Ac weight or transaminases were found. 63 The study of Gastaldelli et al. found improvement in liver fat content after treatment with insulin. 67

3.4.7. Glucagon like polypeptide (GLP‐1) receptor agonists

Fifteen RCTs were included which compared the use of GLP‐1 receptor agonists with insulin therapy, metformin, TZD, DPP4‐inhibitors or placebo. 20 , 21 , 25 , 26 , 30 , 41 , 48 , 63 , 64 , 65 , 68 , 69 , 70 , 71 , 72 Three single arm trials were included. 69 , 71 , 72 Therapy was continued for 5–72 weeks. Three studies used liver histology as reference standard. 20 , 68 , 69 Patients with and without T2DM were included. 20 , 68

In the paper by Newsome et al. 40%–51% of the MASH improved significantly in the semaglutide arm but compared with placebo the difference was not significant for fibrosis. 20 The study by Armstrong et al. showed improvement of MASH in 39% by liraglutide, but compared to placebo the difference was not significant. Fibrosis did not improve significantly in the liraglutide group, however, compared to placebo less patients showed worsening of fibrosis. 68 In the single‐arm study by Eguchi et al. NAFLD scores were reduced significantly in 80% of patients treated with liraglutide and liver fibrosis improved significantly in 60%. 69

Studies used different imaging endpoints to assess MASLD, but overall GLP‐1 receptor agonists had a significant effect on improved MASLD endpoints assessed by imaging. GLP‐1 receptor agonists had a significant effect on weight and HbA1c reduction. Liver enzymes improved significantly in most studies compared to the control group.

3.4.8. Tirzepatide for T2DM and MASLD/MASH

The trial of Gastaldelli et al. compared the effect of tirzepatide to insulin on liversteatosis. 66 This trial showed a significant reduction in liver steatosis, measured with MRI‐PDFF compared to insulin Degludec.

3.4.9. Other possible candidates for the treatment of MASLD and MASH related liver fibrosis

Recently Resmetirom, a thyroid hormone receptor beta agonist that showed significant effects on MASH and fibrosis improvement, was approved for the treatment of MASLD/MASH. 73 , 74 FGF21 analogues have also shown promising results in fibrosis and MASH reduction. 75 Advanced‐phase clinical trials investigate the effectiveness of FGF19 agonists, GLP/GIP dual agonists, Pan‐PPAR agonists and a triple hormone receptor agonist. 76 , 77 , 78 , 79 Table 5 offers an overview of the agents currently being investigated for MASLD/MASH.

TABLE 5.

Advanced‐phase clinical trials investigating agents for the treatment of MASH and liver fibrosis.

Drug Mode of action Study Phase
Aldafermin FGF19 agonism

NCT02443116

NCT04210245

ALPINE 2/3

2B

2B

2B

Efruxifermin FGF21 agonism

BALANCED

HARMONY

SYMMETRY

SYNCHRONY

2

2

2

3

Pegozafermin FGF21 agonism

ENLIVEN

ENLIGHTEN

2

3

Pemvidutide GLP1/glucagon dual agonist NCT05006885 2
Cotadutide GLP1/glucagon dual agonist PROXYMO‐ADV 2
Survodutide GL‐1/glucagon dual agonist

NCT04771273

NCT06309992

2

3

Retradutide Triple agonist of GLP1/glucagon/gastric inhibitor peptide NCT04881760 2
Lanifibrador Pan‐PPAR agonism NATIVE 3 (recruiting)
Firsocostat Acetyl‐CoA Carboxylase inhibition

NCT02876796

NCT02856555

2

2

Clesacostat Acetyl‐CoA Carboxylase inhibition NCT03248882 2

Note: This Table describes different agents being currently investigated as treatment options for MASLD/MASH and liver fibrosis with their study‐names and the phase of the trials.

Abbreviations: Acetyl‐CoA, Acetyl coenzyme A; FGF, Fibroblast Growth Factor; GLP1, Glucagon‐like peptide 1; PPAR, Peroxisome proliferator‐activated receptor.

3.5. Effect of treatment on liver fibrosis

Ten trials evaluated the effect of antidiabetic treatment on liver fibrosis. Four evaluated the effect with TZD derivates. 27 , 35 , 36 , 37 Three reported on the effect of GLP‐1 agonists, 20 , 68 , 69 two studies included SGLT2 inhibitors 51 , 55 and one DPP4 inhibitors. 44

In the single arm study of Eguchi et al., 60% of the patients showed improvement of fibrosis. In the studies by Newsome and Armstrong there was improvement in fibrosis in the GLP1‐receptor agonist arm, but the results were not significant compared to the placebo group. 20 , 68

In the study of Bril et al. a significant reduction in fibrosis score was seen in the pioglitazone treatment arm compared to placebo. 37 The three other trials which included an arm with TZD reported significant improvement of the NAFLD score, but no change in fibrosis or a non‐significant reduction of fibrosis. 27 , 35 , 36

The study of Lai et al., which evaluated the effect of empagliflozin (SGLT2‐inhibitor) in a single arm trial showed a fibrosis improvement in 75% of the patients. The degree of change or improvement was not reported. 55 The trial of Takahashi et al. found significantly more fibrosis improvement in the ipragliflozin group compared with the group with lifestyle modifications in combination with other antidiabetic drugs. 51 In the study of Yilmaz et al., on the effects of sitagliptin no significant reduction in fibrosis was reported. 44

4. DISCUSSION

This systematic literature review was conducted in accordance with PRISMA guidelines and provides insight in the effect of T2DM treatment on the severity of MASLD, MASH and MASH‐fibrosis. GLP‐1 receptor agonists, PPAR agonists and SGLT2 inhibitors may all be candidates for pharmacological treatment in patients with MASLD/MASH and T2DM.

We observed much heterogeneity in primary outcomes in the different trial designs. Outcomes were therefore inhomogeneous. Visceral adipose tissue, subcutaneous adipose tissue, CAP, FIB4, MRI‐PDFF and NALFD MRI scores were all used to evaluate the effect on MASLD. Ten trials evaluated the treatment effects with a histological reference, which is the golden standard for MASH. 80 However, H‐MRS technique is the second best and can be considered as an acceptable alternative for liver biopsy. Part of the trials were pilot studies, including a small number of patients. The quality was therefore average. Due to small study populations or lack of power not all effect sizes could be calculated correctly. More recent studies used a more adequate design and included a placebo arm. 20 , 35 , 36 , 37 , 45 , 50 , 68

Overall, the use of GLP‐1 receptor agonists, TZD derivates and SGLT2 inhibitors showed the strongest MASH improvements evaluated with liver biopsy or imaging techniques (CT and MRS). For the other medication groups, data was not clear. There are no placebo‐controlled trials evaluating the effect of insulin on MASLD/MASH, although some trials included insulin in the treatment‐arm. Insulin did not have a significant effect on MASLD/MASH in these studies, but different endpoints were used. Metformin, SU and DDP4‐inhibitors did not show consistent results.

To our knowledge this is one of the first systematic reviews to assess existing pharmacological T2DM drugs options for MASH/MASLD patients.

This systematic review has some limitations. A narrative design was chosen to deal with heterogeneity of the data. Due to differences in trial design, single arm trials and the lack of use of golden standard together with small sample sizes, effect sizes are small and variable. Due to this heterogeneity in studies, we deliberately chose to refrain from meta‐analysing the data quantitatively, since this might only generate spurious results. Even with the use of multiple medical search databases there were only few trials that used histological material or H‐MRS.

Another limitation of our study is that most research was done in males. MASLD is more prevalent in males, as androgens seem to promote pro‐inflammatory and cirrhotic pathways and estrogens appear to be protective. 81 Although MASLD is more prevalent in males, MASH is more common in older women, and women are more likely to develop advanced liver disease. 82 , 83 The highest MASLD prevalence is in Latin America followed by the Middle East and North Africa. 84 These differences can be partly explained by prevalence of metabolic comorbidities, genetic differences (like for example polymorphisms of the PNPLA3 gene), diet and socioeconomic factors. 83 There seems to be no significant difference in prevalence of fibrosis in patients with MASLD according to ethnicity, but the available data are limited in this respect, 85 since most studies have been done in white populations. Future research should take gender and ethnicity into account when investigating newer agents, to develop an optimal treatment strategy for each individual patient.

Various drugs used in the treatment of T2DM could be beneficial in patients with MASLD or MASH. While GLP1‐receptor agonists, SGLT2‐inhibitors and TZD‐derivatives may be most effective in this respect, the use of the latter may be hampered by potential cardiovascular safety profile issues, namely heart failure. In addition, both GLP1‐based therapy and SGLT2 inhibitors may have a more pronounced effect on the pathophysiological mechanisms involved in MASLD/MASH like the positive effects on body weight and the anti‐inflammatory effects. In addition, TZD‐derivatives increase insulin sensitivity through PPAR‐γ activity. GLP1‐receptor agonists may also have indirect effects on the liver, through reduced hepatopetal FFA‐flux from adipose tissue. 86 , 87 , 88 Both, GLP1‐receptor agonists and SGLT2‐inhibitors have shown to decrease mortality and have a positive effect on preservation of kidney function. 89 Whether part of these effects is mediated by the beneficial effects on the liver, is not yet clear.

To conclude, available evidence suggests improvements in liver enzymes and hepatic steatosis and fibrosis with GLP‐1 receptor agonists, SGLT‐2 inhibitors and TZD derivates. Therefore, these treatment options should be considered when dealing with MASLD/MASH patients, especially in the presence of T2DM. In the near future it is likely that newer agents like dual GLP‐1/GIP or even triple GLP‐1/GIP/Glucagon agonists will play a prominent role in treatment of patients with T2DM and MASLD/MASH. Given the presence of common drivers and shared pathophysiological mechanisms and since most patients with T2DM usually show a gradual increase in body weight, MASLD/MASH is a significant problem in patients with T2DM. Choosing medication with beneficial effects on both T2DM and MASLD will be of great relevance for these patients. Large placebo‐controlled clinical trials including a sufficient number of patients with an adequate follow up period are necessary to provide solid evidence for such dual efficacy.

CONFLICT OF INTEREST

Authors declare no conflicts of interests.

Supporting information

Data S1.

ECI-55-e70003-s001.docx (4.8MB, docx)

ACKNOWLEDGEMENTS

LM, LK, AB, CCM were involved in study concept. IvdL, AB, LM, LK performed data analyses. All the authors made substantial contributions to the design of the work, critically revised and approved the manuscript. Except for the authors mentioned there were no others involved. No external funding was obtained.

Konings LAM, Miguelañez‐Matute L, Boeren AMP, et al. Pharmacological treatment options for metabolic dysfunction‐associated steatotic liver disease in patients with type 2 diabetes mellitus: A systematic review. Eur J Clin Invest. 2025;55:e70003. doi: 10.1111/eci.70003

Laura AM Konings, Lorena Miguelañez‐Matute, Anna MP Boeren were authors contributed equally and should be considered first author.

DATA AVAILABILITY STATEMENT

The data underlying this article will be shared on reasonable request by the corresponding author.

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Associated Data

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Supplementary Materials

Data S1.

ECI-55-e70003-s001.docx (4.8MB, docx)

Data Availability Statement

The data underlying this article will be shared on reasonable request by the corresponding author.


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