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. Author manuscript; available in PMC: 2025 Jul 27.
Published in final edited form as: Gastroenterology. 2024 Apr 29;167(4):689–703. doi: 10.1053/j.gastro.2024.04.029

Association of GLP-1 Receptor Agonists and Hepatocellular Carcinoma Incidence and Hepatic Decompensation in Patients With Type 2 Diabetes

Lindsey Wang 1, Nathan A Berger 1,2, David C Kaelber 3, Rong Xu 2,4
PMCID: PMC12294230  NIHMSID: NIHMS2098590  PMID: 38692395

Abstract

BACKGROUND & AIMS:

Hepatocellular carcinoma (HCC) is a leading cause of cancer death. HCC is preventable with about 70% of HCC attributable to modifiable risk factors. Glucagon-like peptide-1 receptor agonists (GLP-1RAs), Food and Drug Administration–approved medications for treating type 2 diabetes mellitus (T2DM), have pleiotropic effects on counteracting risk factors for HCC. Here we evaluate the association of GLP-1RAs with incident HCC risk in a real-world population.

METHODS:

This retrospective cohort included 1,890,020 patients with a diagnosis of T2DM who were prescribed GLP-1RAs or other non-GLP-1RA anti-diabetes medications and had no prior diagnosis of HCC. Incident (first-time) diagnosis of HCC and hepatic decompensating events during a 5-year follow-up was compared between cohorts of patients prescribed GLP-1 RAs vs other anti-diabetes medications. Time-to-first-event analysis was performed using Kaplan-Meier survival analysis with hazard ratio and 95% confidence interval calculated.

RESULTS:

GLP-1RAs were associated with a lower risk of incident HCC with hazard ratio of 0.20 [0.14–0.31], 0.39 [0.21–0.69], 0.63 [0.26–1.50] compared with insulin, sulfonylureas, and metformin, respectively. GLP-1RAs were associated with a significantly lower risk of hepatic decompensation compared with 6 other anti-diabetes medications. Reduced risks were observed in patients without and with different stages of fatty liver diseases, with more profound effects in patients without liver diseases. Similar findings were observed in patients with and without obesity and alcohol or tobacco use disorders. GLP-1RA combination therapies were associated with decreased risk for HCC and hepatic decompensations compared with monotherapies.

CONCLUSIONS:

GLP-1RAs were associated with a reduced risk of incident HCC and hepatic decompensation compared with other anti-diabetes medications in patients with T2DM. These findings provide supporting evidence for future studies to investigate the underlying mechanisms and their clinical use.

Keywords: Hepatocellular Carcinoma, Glucagon-Like Peptide-1 Receptor Agonists, Type 2 Diabetes Mellitus, Cancer Prevention, Real-World Evidence


Liver cancer, among which 72% is hepatocellular carcinoma (HCC), is the sixth most common cancer and the third leading cause of cancer deaths worldwide.1 In the United States, the incidence of liver cancer has tripled over the past 4 decades.2 Each year in the United States, about 25,000 men and 11,000 women get liver cancer, and about 19,000 men and 9000 women die from the disease.3 About 70% of HCC in the United States is attributable to modifiable risk factors including type 2 diabetes (T2DM), obesity, alcohol or tobacco use disorders, metabolic dysfunction-associated steatotic liver disease (MASLD), and metabolic dysfunction-associated steatohepatitis (MASH).46 Glucagon-like peptide-1 receptor agonists (GLP-1RAs) are medications approved by the Food and Drug Administration for treating T2DM. GLP-1RAs have pleiotropic effects on lowering plasma glucose, inducing weight loss, reducing desire for alcohol drinking and tobacco smoking, and modulating immune functions.79 GLP-1 receptors are present in human hepatocytes and have direct roles in decreasing nonalcoholic fatty liver disease.1013 However, there are no clinical studies to investigate the potential benefits of GLP-1RAs in reducing HCC risk. Because GLPRAs reduce major modifiable risk factors for HCC, we hypothesized that GLP-1RAs are associated with reduced HCC incidence and hepatic decompensation. Here we used an electronic health record (EHR) analytic platform to conduct a nationwide multicenter retrospective cohort study in patients with T2DM who were prescribed GLP-1RAs vs non-GLP-1 RA anti-diabetes medications to determine whether GLP-1RAs were associated with changes in HCC incidence and hepatic decompensation. Separate analyses were performed in patients with and without obesity, with different stages of liver diseases (MASLD, MASH, or liver fibrosis/cirrhosis), and in patients with and without alcohol or tobacco use disorders. We further examined whether combination therapies with GLP-1RAs provided additional benefits compared with monotherapies.

Methods

Database

We used the TriNetX platform to access de-identified EHRs of 111.7 million patients from 63 health care organizations across 50 states, covering diverse age, race/ethnic, income, and insurance groups and clinical settings.14 TriNetX built-in analytic functions allow patient-level analyses, while only reporting population-level data. The MetroHealth System institutional review board determined that the research as described in this study was not human subject research and institutional review board approval was not required. TriNetX platform has been used for retrospective cohort studies1526 including cancer cohort studies.19,26 Similar to this study, we have examined the association of GLP-1RAs with colorectal cancer incidence in patients with T2DM27 and the associations of GLP-1RA (semaglutide) with suicidal ideations28 and with cannabis use in patients with obesity and patients with T2DM.29

Study Population

The study population comprised 1,890,020 patients with a diagnosis of T2DM who were prescribed GLP-1RAs or other non-GLP-1RA anti-diabetes medications (insulin, metformin, dipeptidyl-peptidase-4 (DPP-4) inhibitors, sodium-glucose cotransporter-2 (SGLT2) inhibitors, sulfonylureas, thiazolidinediones) from January 2013 to February 2019 and had no HCC diagnosis before the medication prescription. The study population was divided into exposure and comparison cohorts for each comparison. For comparing GLP-1RAs with insulins, the study population was divided into the following: GLP-1RA(+)Insulin(−) cohort: 47,578 patients prescribed GLP-1RA but not insulins from January 2010 to February 2019, and Insulin(+)GLP-1RA(–) cohort: 1,148,166 patients prescribed insulin from January 2010 to February 2019 and never prescribed GLP-1RAs. Similar designs were used for comparing GLP-1RAs with metformin, DPP-4 inhibitors, SGLT2 inhibitors, sulfonylureas, and thiazolidinediones. Other non-GLP-1RA anti-diabetes medication classes were not examined because of limited sample sizes.

Cohorts were propensity score matched (1:1 using nearest neighbor greedy matching) for risk factors for HCC1,5,6 including demographics (age, gender, race, ethnicity), adverse socioeconomic determinants of health (housing and economic circumstances, upbringing, education, physical environment, social environment), lifestyle factors (exercise, diet, smoking, alcohol drinking), family history of cancers, genetic susceptibility to cancer, obesity (3 International Classification of Diseases, 10th Revision [ICD-10] diagnosis codes and 15 body mass index [BMI] categories ranging from BMI 30 to BMI 70 or greater), T2DM complications (10 different categories), hypertension, alcohol use disorders, benign neoplasm of liver, chronic hepatitis, MASLD, MASH, liver fibrosis, and cirrhosis; and procedures including cancer screening, bariatric surgery, atherosclerotic cardiovascular diseases including disorders of lipoprotein metabolism and other lipidemias, heart diseases, cerebrovascular diseases, and peripheral artery disease; and prior prescription of anti-diabetes medications, aspirin, statins, and nonsteroidal anti-inflammatory analgesics (details in Table 1 and Supplementary Table 1). Two outcomes were examined: first-time diagnosis of HCC (ICD-10 code C22.0 “liver cell carcinoma”)30 and hepatic decompensation events (ascites, spontaneous bacterial peritonitis, hepatic encephalopathy, esophageal varices).31 Patients were followed for 5 years after the index event or time zero (the prescription of GLP-1RA for the exposure cohort vs the prescription of other non-GLP-1RA anti-diabetes medications for the comparison cohorts that occurred in January 2010 to February 2019). The outcomes were compared between the propensity score matched GLP-1RAs and non-GLP-1RA anti-obesity medications cohorts. Kaplan-Meier analysis was used to estimate the probability of outcome at daily time intervals with censoring applied. When the last fact (the outcome of interests, death, or other medical encounters) in the patient’s record is in the time window for analysis, the patient was censored on the day after the last fact in the record. Hazard ratios (HRs) and 95% confidence intervals (95% Cis) were used to describe the relative hazard of the outcomes based on a comparison of time to event rates.

Table 1.

Characteristics of the GLP-1RA(+)Insulin(−) and Insulin(+)GLP-1RA(−) Cohorts Before and After Propensity Score Matching

Before propensity score matching
After propensity score matching
GLP-1RA(+) insulin(−) Insulin(+) GLP-1RA(−) SMD GLP-1RA(+) Insulin(−) Insulin(+) GLP-1RA(−) SMD
Total number 47,578 1,148,166 46,470 46,470

Age at index event, y, mean ± SD 56.0 ± 11.9 62.1 ± 15.8 0.44a 56.1 ± 11.9 56.3 ± 14.7 0.01

Sex (%)
 Female 54.7 46.5 0.16a 54.6 56.2 0.03
 Male 41.5 50.7 0.19a 41.8 40.3 0.03
 Unknown  3.8  2.8 0.06  3.7  3.5 0.008

Ethnicity, %
 Hispanic/Latinx  9.1  8.9 0.008  9.0  9.0 0.001
 Not Hispanic/Latinx 66.0 64.6 0.03 66.1 66.4 0.007

Unknown 24.8 26.5 0.04 24.9 24.6 0.006

Race, %
 American Indian or Alaska Native  0.5  0.5 0.004  0.5  0.5 0.004
 Asian  2.5  3.7 0.07  2.5  2.4 0.006
 Black 13.4 17.4 0.11a 13.5 12.7 0.02

Native Hawaiian or other Pacific Islander  0.4  0.9 0.06  0.4  0.4 0.01
 White 66.4 61.8 0.09 66.3 67.4 0.02
 Unknown 13.9 12.6 0.04 13.9 13.8 0.001

Adverse socioeconomic determinants of health, %  1.7  1.3 0.03  1.7  1.6 0.005

Problems related to lifestyle, %  3.4  2.1 0.08  3.2  3.2 0.001

Family history of cancer  5.1  2.6 0.13a  4.9  4.8 0.005

Genetic susceptibility to cancer  0.1  0.1 0.02  0.1  0.1 0.001

Obesity categories, %
 Morbid (severe) obesity due to excess calories 18.3  7.1 0.34a 17.7 17.4 0.008
 Obesity, unspecified 30.3 12.7 0.44a 29.5 29.1 0.007
 Other obesity due to excess calories  2.9  0.5 0.19a  2.5  2.4 0.01
 BMI 30.0–30.9  1.4  0.7 0.06  1.3  1.1 0.02
 BMI 31.0–31.9  1.5  0.7 0.07  1.3  1.2 0.009
 BMI 32.0–32.9  1.6  0.7 0.08  1.5  1.3 0.01
 BMI 33.0–33.9  1.6  0.7 0.08  1.5  1.5 0.002
 BMI 34.0–34.9  1.8  0.7 0.09  1.7  1.6 0.007
 BMI 35.0–35.9  2.1  0.7 0.12a  1.9  1.8 0.007
 BMI 36.0–36.9  1.9  0.7 0.11a  1.8  1.7 0.005
 BMI 37.0–37.9  1.8  0.6 0.11a  1.7  1.6 0.003
 BMI 38.0–38.9  1.8  0.6 0.11a  1.6  1.6 0.004
 BMI 39.0–39.9  1.3  0.5 0.09  1.2  1.2 0.009
 BMI 40.0–44.9  5.3  1.8 0.19a  4.9  4.5 0.02
 BMI 45.0–49.9  3.1  1.0 0.15a  2.9  2.8 0.005
 BMI 50.0–59.9  2.2  0.8 0.12a  2.0  1.9 0.008
 BMI 60.0–69.9  0.6  0.2 0.06  0.6  0.6 0.002
 BMI ≥70  0.2  0.1 0.03  0.2  0.2 0.01

T2DM categories, %
 Type 2 diabetes mellitus without complications 75.1 58.1 0.37a 74.6 74.4 0.005
 Type 2 diabetes mellitus with hyperglycemia 29.8 17.9 0.28a 29.0 28.6 0.01
 Type 2 diabetes mellitus with hyperosmolarity  0.9  0.5 0.04  0.9  0.8 0.01
 Type 2 diabetes mellitus with ketoacidosis  0.2  0.5 0.05  0.2  0.1 0.02
 Type 2 diabetes mellitus with kidney complications  6.6  8.7 0.08  6.6  6.0 0.02
 Type 2 diabetes mellitus with ophthalmic complications  4.9  5.6 0.03  4.9  4.6 0.02
 Type 2 diabetes mellitus with neurological complications 10.4  9.6 0.03 10.3  9.8 0.02
 Type 2 diabetes mellitus with circulatory complications  2.9  2.9 0.001  2.9  2.7 0.01
 Type 2 diabetes mellitus with other specified complications 32.4 20.4 0.28a 31.7 30.9 0.02
 Type 2 diabetes mellitus with unspecified complications  7.3  4.0 0.14a  7.0  6.8 0.008

Pre-existing medical conditions, procedures, medications, %
 Alcohol-related disorders  1.4  2.9 0.11a  1.4  1.3 0.007
 Tobacco use disorder  8.2 10.1 0.07  8.2  7.8 0.02
 Benign neoplasm of liver  0.1  0.1 0.008  0.1  0.1 0.002
 Chronic viral hepatitis  0.6  1.3 0.07  0.6  0.5 0.02
 Unspecified viral hepatitis  0.7  1.5 0.08  0.7  0.6 0.009
 Chronic hepatitis, not elsewhere classified  0.1  0.2 0.02  0.1  0.1 0.005
 Alcoholic liver disease  0.2  0.7 0.09  0.2  0.2 0.002
 Fatty (change of) liver, not elsewhere classified (MASLD)  7.0  2.5 0.21a  6.7  6.4 0.009
 Metabolic dysfunction-associated steatohepatitis (MASH)  1.1  0.4 0.09  1.0  1.0 0.002
 Fibrosis and cirrhosis of liver  1.1  2.0 0.07  1.0  1.0 0.006
 Hepatic fibrosis  0.7  1.0 0.04  0.6  0.6 0.002
 Liver cirrhosis  0.9  1.9 0.09  0.9  0.8 0.003
 Hepatic encephalopathy  0.0  0.1 0.04  0.0  0.0 0.006
 Esophageal varices  0.2  0.6 0.06  0.2  0.2 <.001
 Spontaneous bacterial peritonitis  0.0  0.1 0.03  0.0  0.0 <.001
 Ascites  0.4  1.6 0.12a  0.4  0.3 0.01
 Hypertension 61.5 54.7 0.14a 61.5 61.5 0.02
 Disorders of lipoprotein metabolism and other lipidemias 59.0 40.6 0.37a 58.2 58.1 0.003
 Ischemic heart diseases 13.1 22.4 0.25a 13.3 12.1 0.03
 Other forms of heart disease 16.5 28.0 0.28a 16.7 15.2 0.04
 Cerebrovascular diseases  4.8 10.9 0.23a  4.9  4.4 0.03
 Diseases of arteries, arterioles and capillaries  6.7 11.2 0.16a  6.7  6.2 0.02
 Bariatric surgery  1.7  0.6 0.11a  1.6  1.6 0.005
 Encounter for screening for malignant neoplasms 26.2 11.9 0.37a 25.6 25.4 0.004
 Insulins 19.0  6.7 0.38a 18.2 17.0 0.03
 Metformin 58.4 22.0 0.80a 57.5 57.6 0.001
 DPP-4 inhibitors 20.0  4.9 0.47a 19.0 18.9 0.003
 SGLT2 inhibitors  9.8  0.7 0.42a  8.3  7.7 0.02
 Sulfonylureas 29.6 13.6 0.40a 29.1 29.1 0.001
 Thiazolidinediones  8.7  3.9 0.20a  8.6  8.6 <.001
 Aspirin 24.9 22.4 0.06 24.9 24.0 0.02
 Nonsteroidal anti-inflammatory analgesics 15.9  9.2 0.20a 15.6 15.0 0.02
 Atorvastatin 27.6 15.0 0.31a 27.0 26.3 0.02
 Lovastatin  2.1  1.6 0.04  2.1  2.0 0.004
 Pravastatin  7.7  4.5 0.13a  7.5  7.5 0.004
 Rosuvastatin  8.4  3.6 0.20a  8.1  8.2 0.003
 Simvastatin 16.0 11.5 0.13a 16.0 15.7 0.008

NOTE. Shown are cohorts before and after propensity score matching for the listed variables. The status of variables was based on the presence of related clinical codes anytime to 1 day before the index event (prescription of GLP-1RAs or insulins in 1/2010–2/2019).

SD, standard deviation; SMD, standardized mean differences.

a

SMD greater than 0.1, a threshold indicating cohort imbalance. Adverse socioeconomic determinants of health include housing and economic circumstances, upbringing, education, physical environment, and social environment. Problems with lifestyle included tobacco use, lack of physical exercise, inappropriate diet and eating habits and others.

Insulin is known to be associated with increased risk for HCC.3234 Because patients with T2DM were often prescribed both insulins and GLP-1RAs or other anti-diabetes medications, insulins could mask the potential beneficial effects of GLP-1RAs. We further compared GLP-1RAs with the other 5 anti-diabetes medications in patients with patients who were not prescribed any insulins after the index event (prescriptions of GLP-1RAs or other anti-diabetes medications).

GLP-1RAs were compared with each of the 6 non-GLP-1RA anti-diabetes medications in separate analyses in patients with T2DM with and without a prior history of obesity. The status of obesity was based on the presence or absence of ICD-10 codes for obesity and related BMI codes (details in Supplementary Table 1) before the index event.

Separate analyses were performed in 3 T2DM patient populations without and with different stages of fatty liver diseases: (1) patients without MASLD, MASH, or liver fibrosis and cirrhosis; (2) patients with MASLD or MASH; and (3) patients with liver fibrosis and cirrhosis. The status of these liver diseases was based on the presence or absence of related ICD-10 codes (details in Supplementary Table 1) before the index event. Because of sample limitations, we did not further examine the outcomes in patients with MASLD and with MASH separately.

Separate analyses were performed in patients with T2DM with and without a prior history of alcohol or tobacco use disorders. The status of alcohol or tobacco use disorders was based on the presence or absence of related ICD-10 codes (details in the Supplementary Table 1) before the index event. Because of sample limitations, we did not further examine the outcomes in patients with alcohol use disorder and tobacco use disorder separately.

We compared the risk of HCC incidence and hepatic decompensation between combination therapies with GLP-1RAs with monotherapies without GLP-1RAs for all 6 medication classes. In addition, combination therapies with GLP-1RAs were also compared with monotherapy of GLP-1RAs.

The data were collected and analyzed on March 4, 2024, within the TriNetX Analytics Platform. Details of clinical codes for defining study populations, outcomes, and confounding variables are in Supplementary Table 1.

Results

Risks of HCC Incidence and Hepatic Decompensating Events in Patients With T2DM: GLP-1 RAs vs Non-GLP-1RA Anti-diabetes Medications

GLP-1RAs were separately compared with each of the 6 non-GLP-1RA anti-diabetes medications (insulins, metformin, DPP-4 inhibitors, SGLT2 inhibitors, sulfonylureas, thiazolidinediones). For comparing GLP-1RAs with insulins, the study population included 1,195,744 patients with T2DM who were prescribed GLP-1RAs or insulins but not from January 2010 to February 2019. The GLP-1RA(+) Insulin(−) cohort compared with the Insulin(+)GLP-1RA(−) cohort was younger, included more women, more White and fewer Black people, had a higher prevalence of obesity, diabetes with hyperglycemia, MAFLD, and prior prescriptions of non-GLP-1RA, statins, and nonsteroidal anti-inflammatory analgesics and anti-diabetes medications. After propensity score matching, the 2 cohorts (46,470 in each, mean age 56.2 years, 55.4% women, 13.1% Black, 66.9% White, 9.0% Hispanic) were balanced (Table 1). The characteristics for comparing GLP-1RA to the other 5 non-GLP-1RA anti-diabetes medication classes were in Supplementary Tables 26.

GLP-1RAs were associated with a significantly lower risk for HCC incidence compared with insulin (HR, 0.20; 95% CI, 0.14–0.31) and sulfonylureas (HR, 0.78; 95% CI, 0.65–0.93). No significant difference was observed when comparing GLP-1RAs with metformin, DPP-4 inhibitors, SGLT2 inhibitors, or thiazolidinediones (Figure 1A). However, among patients who were not prescribed insulin after the prescriptions of GLP-1RA or other anti-diabetes medications, GLP-1RAs were associated with a more profound lower risk for HCC compared with sulfonylureas (HR, 0.39; 95% CI, 0.21–0.69). GLP-1RAs were associated with a lower risk of HCC compared with metformin or DPP-4 inhibitors (Figure 1A). However, the difference was not statistically significant, which may be due to the small sample sizes because most patients were prescribed insulins.

Figure 1.

Figure 1.

Risk of incident (first-time diagnosis) HCC and hepatic decompensating events in patients with T2DM. (A) Comparison of the risk of incident HCC between propensity score–matched cohorts. (B) Comparison of the risk of hepatic decompensating events between propensity score–matched cohorts. Outcomes were followed for 5 years after the index event (prescription of GLP-1RA vs specific non-GLP-1RA anti-diabetes medication classes [but not both] in 1/2010–2/2019). Hazard rates were calculated using Kaplan-Meier analysis to estimate the probability of outcome at daily time intervals with censoring applied. Overall risk = number of patients with outcomes during the follow-up time window/number of patients in the cohort at the beginning of the time window. A plus sign (+) indicates that a patient was prescribed GLP-1RA or non-GLP-1RA anti-diabetes medication, while a minus sign (−) indicates that they were not. SU, sulfonylureas, TZD, thiazolidinediones.

GLP-1RAs were associated with a significantly lower risk for hepatic decompensating events compared with all 6 non-GLP-1RA anti-diabetes medication classes (Figure 1B). A similar lower risk was observed in patients without insulin prescriptions, although some of the differences were not statistically significant due to limited sample sizes.

In summary, GLP-1RAs were associated with a decreased risk of HCC compared with insulin and sulfonylureas. In patients without insulin prescriptions, GLP-1RAs were associated with a decreased risk of HCC compared with metformin, DPP-4 inhibitors, and sulfonylureas, with more profound effects than in the overall population. GLP-1RAs were associated with a decreased risk of hepatic decompensating events compared with all 6 other anti-diabetes medication classes, with more profound effects in patients who were not prescribed insulins.

Risks of HCC Incidence and Hepatic Decompensating Events in Patients With T2DM, With and Without Obesity: GLP-1 RAs vs Non-GLP-1RA Anti-diabetes Medications

Obesity has been independently associated with increased risk for HCC.35 Obesity and T2DM often co-occur in patients. As shown in Table 1, the prevalence of obesity including severe obesity in the GLP-1RA(+)Insulin(−) and Insulin(+)GLP-1RA(−) cohorts ranged from 20% to 50%. Here we further examined the associations of GLP-1RAs with HCC and hepatic decompensation compared with other anti-obesity medications in patients with and without obesity.

Among patients with T2DM and obesity, GLP-1RAs were associated with a significantly lower risk for HCC incidence compared with insulin (HR, 0.20; 95% CI, 0.14–0.31), lower but not significant compared with sulfonylureas and metformin. A similar trend was found for patients without obesity (Figure 2A). GLP-1RAs were associated with a lower risk for hepatic decompensating events compared with all 6 non-GLP-1RA anti-diabetes medication classes, similar in patients with and without obesity (Figure 2B).

Figure 2.

Figure 2.

Risk of incident (first-time diagnosis) HCC and hepatic decompensating events in patients with T2DM, with and without obesity. (A) Comparison of the risk of incident HCC between propensity score–matched cohorts. (B) Comparison of the risk of hepatic decompensating events between propensity score–matched cohorts. Outcomes were followed for 5 years after the index event.

In summary, the associations of GLP-1RAs with HCC and hepatic decompensating event were similar in patients with and without obesity, suggesting its effects are independent of weight loss.

Risks of HCC Incidence and Hepatic Decompensating Events in Patients With T2DM, Without and With Different Stages of Fatty Liver Diseases: GLP-1 RAs vs Non-GLP-1RA Anti-diabetes Medications

We then examined the associations of GLP-RAs with HCC and hepatic decompensating events in patients with T2DM, without and with different stages of fatty liver diseases. Among patients with no MASLD, MASH, or liver fibrosis and cirrhosis, GLP-1RAs were associated with a significantly lower risk for HCC incidence compared with insulin (HR, 0.18; 95% CI, 0.11–0.31), lower but not significant risk compared with metformin, DPP-4 inhibitors, SGLT2 inhibitors, and sulfonylureas. Among patients with a prior diagnosis of MASLD or MASH, GLP-1RAs were associated with a significantly lower risk for HCC incidence compared with insulin (HR, 0.34; 95% CI, 0.17–0.70) but not with other anti-diabetes medications. Among patients with a prior diagnosis of liver fibrosis and cirrhosis, GLP-1RAs were associated with a significantly lower risk for HCC incidence compared with insulin (HR, 0.27; 95% CI, 0.12–0.63) but not with other anti-diabetes medications (Figure 3A).

Figure 3.

Figure 3.

Risk of the incident (first-time diagnosis) HCC and hepatic decompensating events in patients with T2DM, with and without MASLD, MASH, and liver fibrosis and cirrhosis. (A) Comparison of the risk of incident HCC between propensity score–matched cohorts. (B) Comparison of the risk of hepatic decompensating events between propensity score–matched cohorts. Outcomes were followed for 5 years after the index event.

For the outcome of hepatic decompensating events, GLP-1RAs were associated with decreased risk in patients without MASLD, MASH, or liver fibrosis and cirrhosis compared with all 6 non-GLP-1RA anti-diabetes medications. Among patients with a prior diagnosis of MASLD or MASH, GLP-1RAs were associated with a significantly lower risk for hepatic decompensating events compared with other anti-diabetes medications except for thiazolidinediones. Among patients with a prior diagnosis of liver fibrosis and cirrhosis, GLP-1RAs were associated with a significantly lower risk for HCC incidence compared with other anti-diabetes medications except for SGLT2 inhibitors and thiazolidinediones (Figure 3B).

In summary, GLP-1RAs were associated with reduced risks of HCC and hepatic decompensating events in patients without and with fatty liver diseases. The effects were more profound effects in those without than those with fatty liver diseases.

Risk of HCC Incidence and Hepatic Decompensating Events in Patients With T2DM, With and Without Alcohol or Tobacco Use Disorders: GLP-1 RAs vs Non-GLP-1RA Anti-diabetes Medications

We then examined the associations of GLP-RAs with HCC and hepatic decompensating events in patients with and without alcohol or tobacco use disorders. Among patients with no prior diagnosis of alcohol or tobacco use disorders, GLP-1RAs were associated with a significantly lower risk for HCC incidence compared with insulin (HR, 0.22; 95% CI, 0.14–0.35), lower but not significant risk compared with metformin, DPP-4 inhibitors, and sulfonylureas. Among patients with a prior diagnosis of alcohol or tobacco use disorders, GLP-1RAs were associated with a lower, but not significant, risk for HCC incidence compared with insulin due to small sample sizes (Figure 4A).

Figure 4.

Figure 4.

Risk of the incident (first-time diagnosis) HCC and hepatic decompensating events in patients with T2DM, with and without alcohol or tobacco use disorders. (A) Comparison of the risk of incident HCC between propensity score–matched cohorts. (B) Comparison of the risk of hepatic decompensating events between propensity score–matched cohorts. Outcomes were followed for 5 years after the index event.

For the outcome of hepatic decompensating events, GLP-1RAs were associated with a decreased risk in patients without alcohol or tobacco use disorders compared with all 6 non-GLP-1RA anti-diabetes medications. Among patients with alcohol or tobacco use disorders, GLP-1RAs were associated with a significantly lower risk for hepatic decompensating events compared with other anti-diabetes medications except for metformin and SGLT2 inhibitors (Figure 4B).

Risk of HCC Incidence and Hepatic Decompensating Events in Patients With T2DM: GLP-1RA Combinations vs Monotherapies

GLP-1RA combination therapies were associated with decreased risk for HCC compared with monotherapies without GLP-1RAs for all 6 medication classes. The reduction was similar across 6 medication classes, significant for insulin and metformin, but not for other medications, which might be because of their smaller sample sizes. These consistent reductions compared with all 6 monotherapies suggest that GLP-1RAs had protective effects on HCC, which was independent of the types of combining medications. In addition, GLP-1RA combinations have additional beneficial effects compared with monotherapies of non-GLP-1RA anti-diabetes medications such as metformin (Figure 5A, top panel).

Figure 5.

Figure 5.

Comparing GLP-1RA combination therapies with monotherapies for the risk of the incident (first-time diagnosis) HCC and hepatic decompensating events in patients with T2DM. (A) Comparison of the risk of incident HCC between propensity score–matched cohorts. (B) Comparison of the risk of hepatic decompensating events between propensity score–matched cohorts. Outcomes were followed for 5 years after the index event (prescription of GLP-1RA for the GLP-RA combination therapies vs specific anti-diabetes medication classes for monotherapies from January 2010 to February 2019).

Compared with GLP-1RA monotherapy, GLP-1RA combination therapies with insulin were associated with a higher risk for HCC, suggesting the harmful effects of insulin on HCC could not be reversed by GLP-1RAs. GLP-1RAs combined with SGLT2 inhibitors or thiazolidinediones compared with GLP-1RA monotherapy were associated with decreased risk for HCC, suggesting that potential preventive effects of SGLT2 inhibitors or thiazolidinediones on HCC prevention and that GLP-1RA combinations with these medications were better in preventing HCC than GLP-1RAs alone (Figure 5A, bottom panel).

Similar findings were observed for hepatic decompensating events. GLP-1RA combination therapies were consistently associated with decreased risk for hepatic decompensating events compared with all 6 different monotherapies of non-GLP-1RA anti-diabetes medications, suggesting GLP-1RA’s beneficial effects on hepatic decompensating events (Figure 5B, top panel). The results comparing GLP-1RA combination therapies with GLP-1RA monotherapy indicate that insulins are harmful and GLP-1RAs could not reverse the harmful effects. These results also revealed that metformin, SGLT2 inhibitors, sulfonylureas, and thiazolidinediones are beneficial for hepatic decompensating events and GLP-1RA combinations with these medications were better at improving liver functions than GLP-1RA monotherapy (Figure 5B, bottom panel).

In summary, the data comparing GLP-1RA combination therapies with monotherapies suggest that GLP-1RAs are beneficial in preventing HCC and reducing hepatic decompensation and GLP-1RA combinational therapies conferred additional benefits compared with monotherapies.

Discussion

Here we document a potential benefit of GLP-1RAs, alone and in combination with other anti-diabetes medications, in preventing HCC and reducing hepatic decompensation in a real-world population of 1.89 million patients with T2DM. Our results show that GLP-1RAs were effective in patients with different stages of fatty liver diseases (MASLD, MASH), or liver fibrosis and cirrhosis, but most effective in patients without prior liver diseases. Our results also show that GLP-1RAs were associated with reduced risk for HCC and hepatic decompensation events in patients with and without obesity and in patients with and without alcohol or tobacco use disorders. These results extend preclinical and clinical studies that GLP-1RAs reduced obesity, T2DM, MASLD, MASH, and alcohol or tobacco use disorders,8,9,13,36,37 all of which are major risk factors for HCC5 However, to the best of our knowledge, no studies have examined GLP-1RAs in HCC prevention. Thus, the potential beneficial effects of GLP-1RA on HCC prevention deserve attention in that HCC remains one of the leading causes of cancer death.1

GLP-1RAs were associated with a significantly decreased risk for HCC compared with insulins and sulfonylureas. Previous studies suggest that treatment of T2DM with insulins may increase the incidence of certain malignancies, including HCC.3234 Sulfonylureas lower blood glucose by stimulating insulin secretion and increasing insulin blood level.38 Studies have shown that sulfonylureas were associated with an increased risk of HCC incidence.34,39,40 Epidemiological, clinical, and preclinical studies have shown that insulin and insulin-like growth factor signaling promote cancer risk and prognosis.32 Therefore it is important to separate the potential beneficial effects of GLP-1RAs from the harmful effects of insulins and sulfonylureas. In comparing GLP-1RA combination therapies with monotherapies, we showed that GLP-1RA combination therapies were associated with decreased risk for HCC and hepatic decompensation events compared with corresponding monotherapy of non-GLP-1RA anti-diabetes medications, consistent across all 6 medications including insulins and sulfonylureas. These results strongly support beneficial effects of GLP-1RAs independent of the comparison medications.

A meta-analysis of 10 observational studies of 334,307 patients with T2DM showed a 50% and 46% reduction in HCC incidence with metformin and thiazolidinediones, respectively.34 DPP-4 is a membrane-associated peptidase and plays crucial roles in the development of various chronic liver diseases including nonalcoholic fatty liver disease, and HCC through its peptidase activity, immune modulation, degradation of extracellular matrix, and lipid accumulation.41 SGLT2 inhibitors have multiple pleiotropic effects including glucose lowering, weight loss, blood pressure reduction, improvement in liver enzymes, and steatosis.42,43 These previous studies supported the potential beneficial effects of metformin, DPP-4 inhibitors, SGLT2 inhibitors, and thiazolidinediones on HCC. By comparing GLP-1RAs with these medications, we showed no significant differences in HCC incidence though significant reductions in hepatic decompensation events, suggesting that GLP-1RAs have similar beneficial effects in HCC prevention. However, in patients without insulins, GLP-1RAs were associated with decreased risk for HCC compared with metformin and DPP-4 inhibitors, although the difference was not statistically significant because of small sample sizes. These results indicate that GLP-1RAs may have stronger protective effects on HCC than metformin and DPP-4 inhibitors.

In comparing GLP-1RA combination therapies with monotherapies, we showed that GLP-1RA combination therapies were associated with decreased risk for HCC and hepatic decompensation events compared with corresponding monotherapy of metformin, DPP-4 inhibitors, SGLT2 inhibitors, or thiazolidinediones. These results strongly support the beneficial effects of GLP-1RAs independent of these medications and that GLP-1RA combination therapies offer additional benefits to these beneficial comparison medications.

Obesity is a risk factor for multiple cancers, including the colon, rectum, gastric cardia, liver, gallbladder, pancreas, and kidney and esophagus cancer, with a relative risk of 1.8 for HCC.44 GLP-1RAs promote weight loss by reducing the appetite and feelings of hunger, slowing the release of food from the stomach, and increasing feelings of fullness after eating.45 We compared GLP-1RAs with other anti-diabetes medications in T2DM patients with and without obesity. We showed that GLP-1RAs were associated with a decreased risk for HCC incidence and hepatic decompensation events compared with other medications (insulins, metformin, DPP-4 inhibitors, SGLT2 inhibitors, and sulfonylureas) in patients without obesity. These results indicate the potential effects of GLP-1RAs on HCC and liver functions in addition to those associated with weight loss.

Excess alcohol consumption and tobacco use are established risk factors for HCC.4648 Preclinical and clinical studies have shown that GLP-1RAs reduced drinking and relapse8,49,50 and nicotine intake and smoking cessation.51,52 We examined the associations of GLP-RAs with HCC and hepatic decompensating events in patients with and without alcohol or tobacco use disorders. Among patients with no prior diagnosis of alcohol or tobacco use disorders, GLP-1RAs were associated with a decreased risk for HCC compared with insulin, metformin, DPP-4 inhibitors, and sulfonylureas and reduced risk for hepatic decompensation compared with all 6 non-GLP-1RA anti-diabetes medications. These results suggest the potential effects of GLP-1RAs on preventing HCC and improving liver functions in addition to their functions in curbing the desire for alcohol drinking and tobacco smoking.

MASLD is characterized by hepatic steatosis in the absence of heavy alcohol consumption and may progress to MASH and hepatic fibrosis and cirrhosis.53 MASLD, particularly MASH and MASH-associated hepatic fibrosis and cirrhosis, contributes to the development of HCC.54,55 MASLD is the fastest-growing cause of HCC in the United States.56 GLP-1RAs were shown to have beneficial effects on MASH resolution but not MASH-related liver fibrosis.13,57 We show that in patients without MASLD, MASH, or liver fibrosis and cirrhosis, GLP-1RAs were associated with a decreased risk for HCC incidence compared with insulin, metformin, DPP-4 inhibitors, SGLT2 inhibitors, and sulfonylureas. Among patients with MASLD, MASH, or liver fibrosis and cirrhosis, GLP-1RAs were associated with a lower risk for HCC incidence compared with insulin but not with other anti-diabetes medications. In addition, GLP-1RAs were associated with lower risks for hepatic decompensations compared with all 6 non-GLP-1RA anti-diabetic medications in patients without and with these fatty liver diseases and the effects were more profound in patients without these diseases.

MASLD is the most common cause of liver diseases, with an estimated prevalence of 20% to 30% in general population,58 40% to 70% among patients with T2DM, and 50% to 90% among patients with obesity.56,5860 However, liver diseases including MASLD are often underdiagnosed and underrecorded in patient EHRs. In a large primary-care record study of 17,669,973 adults, 176,114 or 1% had a recorded diagnosis of MASLD.61 In our study, the prevalence of MASLD was 2.5% to 7.0% in patients with T2DM, which is significantly lower than the actual 40% to 70%. This underdiagnosis suggests that the study population without documented fatty liver diseases might include patients with MASLD, MASH, or liver fibrosis, which could have underestimated the beneficial effects of GLP-1RAs in preventing HCC and improving liver functions in this study population. In summary, these observations suggest the need for clinical trials to test the early use of GLP-1RAs as an intervention to prevent the development of irreversible progression to HCC in patients with T2DM.

We showed that combination therapies with GLP-1RAs were associated with consistently reduced risk for HCC and hepatic decompensation compared with all 6 corresponding monotherapies. These consistent reductions indicate that GLP-1RAs had protective effects on HCC independent of the specific types of combining medications and that combinations with GLP-1RA have additional beneficial effects compared with monotherapies. Although GLP-1RA plus insulin was better than insulin monotherapy in preventing HCC, GLP-1RAs did not reverse the harmful effects of insulins on HCC risk because patients prescribed GLP-1RAs plus insulin still had an increased risk for HCC or hepatic decompensation compared with those prescribed GLP-1RAs alone.

HCC was mainly driven by chronic liver inflammation.62 Deregulation of the liver’s central role in immunoregulation is a hallmark of MASLD, MASH, liver fibrosis, and HCC. Inflammatory pathways, including cytokine signaling, innate immune signaling, and adaptive immunity contribute to inflammation-mediated HCC development.62 GLP-1RAs have been shown to significantly reduce chronic and systematic inflammation and reduce serum levels of C-reactive protein, interleukin-6 and tumor necrosis factor-α.6264 Studies show that GLP-1RAs also modulate innate immune response in innate immune cells,65 and can reverse the negative effects of MASLD by modulating M2 Kupffer cells.66 Although our study is observational and could not elucidate mechanisms underlying the observed beneficial effects of GLP-1RA on HCC and liver functions, the consistent findings from various populations stratified by their insulin use, the status of obesity, status of fatty liver diseases, and alcohol and tobacco use suggest that GLP-1RA may reduce HCC in addition to their effects on weight loss, improving on liver diseases or curbing alcohol use or smoking. These additional beneficial effects of GLP-1RAs on HCC may be mediated through immune modulation on liver function, which may represent an effective immunomodulating approach for HCC and liver diseases. However, further studies in elucidating these mechanisms are needed.

Our study has its limitations. First, as a retrospective observational study, no causal inferences can be drawn. In addition, we could not directly examine the underlying mechanism of how GLP-1RAs may have effects on HCC, largely because of the limitations of data and analytics tools. To probe potential mechanisms, we designed several sub-analyses in patients stratified by the status of obesity, alcohol or tobacco use disorders, and fatty liver diseases. Second, patients in our study were drawn from the TriNetX platform. Results need to be validated in other populations and platforms. Third, retrospective observational studies have inherent limitations, including unmeasured or uncontrolled confounders and biases. Although we controlled for an extensive list of more than 80 variables, these could not be fully eliminated. Fourth our follow-up time was 5 years. HCC often takes years to develop and its age of onset in the United States is 60 to 70.5 For our study, the mean age was 56.2 years, and the study population was high-risk because all patients had T2DM. Although our study observed a statistically lower risk for GLP-1RAs compared with non-GLP-1RA anti-diabetes medications, future longer-term studies are necessary. Fifth, the study period was 2010 to 2019 to allow for a 5-year follow-up for all patients at the time of data collection and analysis in March 2024. Semaglutide was approved for treating T2DM in December 2017 and gained popularity after its approval in 2021 for weight loss. Preclinical and clinical studies showed that it reduces alcohol intake, tobacco smoking, MASLD, and MASH.8,13,36,37 Ongoing clinical trials are evaluating the beneficial effects of semaglutide on heavy drinking, tobacco cessation, MASLD, and MASH. Although the GLP-1RAs in our study included semaglutide, the sample size was limited for separate analyses for semaglutide. Therefore, future work is warranted to examine long-term associations of semaglutide with HCC incidence in patients with T2DM and with obesity. Sixth, patient EHRs had limited information about medication duration and adherence, therefore these variables could not be controlled in our study. Although we controlled demographics, adverse socioeconomic status, and medical encounters for cancer screening, and all the patients in the study population had medical encounters for their T2DM diagnosis and were subsequently prescribed anti-diabetes medications, we could not explicitly control for resource access and health care utilization.

In summary, findings from this study show that GLP-1RA was associated with a lower risk for HCC incidence and hepatic decompensation compared with non-GLP-1 RA anti-diabetes medications in a real-world population of patients with T2DM, a high-risk population for HCC. However, the effect of GLP-1 RAs on HCC risk compared with other anti-diabetes medications should be interpreted with caution owing to the inherent and heterogeneous cancer-modifying effect of the comparator group and different underlying molecular mechanisms. Given the alarming increase in HCC and its poor prognosis, as well as a significantly increased risk for HCC in patients with T2DM, further preclinical and clinical studies are warranted to investigate the underlying mechanisms and to support its use clinically for HCC prevention.

Supplementary Material

supplement

Note: To access the supplementary material accompanying this article, visit the online version of Gastroenterology at www.gastrojournal.org, and at https://doi.org/10.1053/j.gastro.2024.04.029.

WHAT YOU NEED TO KNOW.

BACKGROUND AND CONTEXT

About 70% of hepatocellular carcinoma is attributable to modifiable risk factors. Medications targeting these modifiable risk factors are beneficial for hepatocellular carcinoma prevention.

NEW FINDINGS

Based on a cohort study of 1,890,020 patients with type 2 diabetes, glucagon-like peptide-1 receptor agonists were associated with a lower risk of hepatocellular carcinoma compared with other anti-diabetes medications.

LIMITATIONS

This is a retrospective observational study with inherent limitations including unmeasured or uncontrolled confounders and biases.

CLINICAL RESEARCH RELEVANCE

These findings provide preliminary evidence of the potential benefit of glucagon-like peptide-1 receptor agonists for hepatocellular carcinoma prevention and hepatic function improvement in a real-world high-risk population of patients with type 2 diabetes, supporting future clinical studies to investigate its clinical use for hepatocellular carcinoma prevention and liver function improvement.

BASIC RESEARCH RELEVANCE

Findings from this study call for preclinical studies of the underlying mechanism.

Funding

We acknowledge support from National Cancer Institute Case Comprehensive Cancer Center (CA221718, CA043703), American Cancer Society (RSG-16–049–01 – MPC), The Landon Foundation-AACR (15–20–27-XU), NIH Director’s New Innovator Award Program (DP2HD084068), National Institute on Aging (AG057557, AG061388, AG062272, AG07664), National Institute on Alcohol Abuse and Alcoholism (AA029831). The funding source had no role in this study including design, execution, analyses, interpretation of the data, or decision to submit results.

Abbreviations used in this paper:

BMI

body mass index

CI

confidence interval

DPP-4 inhibitors

dipeptidyl-peptidase-4 inhibitors

EHRs

electronic health records

GLP-1RAs

Glucagon-like peptide-1 receptor agonists

HCC

hepatocellular carcinoma

HR

hazard ratio

ICD-10

International Classification of Diseases, 10th Revision

MASH

metabolic dysfunction-associated steatohepatitis

MASLD

metabolic dysfunction-associated steatotic liver disease

SGLT2 inhibitors

sodium-glucose cotransporter-2 inhibitors

T2DM

type 2 diabetes mellitus

Footnotes

CRediT Authorship Contributions

Lindsey Wang (Formal analysis: Lead; Investigation: Lead; Methodology: Lead; Validation: Lead; Visualization: Lead; Writing – original draft: Supporting; Writing review & editing: Supporting)

Nathan A. Berger, MD (Conceptualization: Equal; Funding acquisition: Lead; Investigation: Equal; Methodology: Equal; Supervision: Lead; Validation: Equal; Writing– original draft: Equal; Writing – review & editing: Equal)

David C. Kaelber, MD, PhD, MPH (Investigation: Supporting; Methodology: Supporting; Project administration: Supporting; Resources: Supporting; Software: Supporting)

Rong Xu, PhD (Conceptualization: Equal; Formal analysis: Supporting; Funding acquisition: Supporting; Investigation: Equal; Methodology: Supporting; Project administration: Equal; Resources: Equal; Supervision: Equal; Validation: Supporting; Visualization: Supporting; Writing – original draft: Equal; Writing – review & editing: Equal)

Conflicts of interest

The authors disclose no conflicts.

Data Availability

This study used population-level aggregate and de-identified data collected by the TriNetX platform and are available from TriNetX, LLC (https://trinetx.com/) but third-party restrictions apply to the availability of these data. The data were used under license for this study with restrictions that do not allow for the data to be redistributed or made publicly available. To gain access to the data, a request can be made to TriNetX (join@trinetx.com), but costs might be incurred, and a data-sharing agreement would be necessary. Data specific to this study including diagnosis codes and cohort characteristics in aggregated format are included in the manuscript as tables, figures, and supplementary files. All the statistical analyses in this study including propensity score matching and Kaplan-Meier Survival analyses were conducted within the TriNetX platform by using its built-in functions. Data and code to reproduce the analyses can be accessed at https://github.com/liwang0904/GLP-HCC

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Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Supplementary Materials

supplement

Data Availability Statement

This study used population-level aggregate and de-identified data collected by the TriNetX platform and are available from TriNetX, LLC (https://trinetx.com/) but third-party restrictions apply to the availability of these data. The data were used under license for this study with restrictions that do not allow for the data to be redistributed or made publicly available. To gain access to the data, a request can be made to TriNetX (join@trinetx.com), but costs might be incurred, and a data-sharing agreement would be necessary. Data specific to this study including diagnosis codes and cohort characteristics in aggregated format are included in the manuscript as tables, figures, and supplementary files. All the statistical analyses in this study including propensity score matching and Kaplan-Meier Survival analyses were conducted within the TriNetX platform by using its built-in functions. Data and code to reproduce the analyses can be accessed at https://github.com/liwang0904/GLP-HCC

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