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. 2016 Apr;8(2):85–92. doi: 10.15171/mejdd.2016.12

Pathological and Clinical Correlation between Celiac Disease and Helicobacter Pylori Infection; a Review of Controversial Reports

Mohammad Rostami-Nejad 1, Mohammad Javad Ehsani-Ardakani 1, Hamid Assadzadeh 2, Bijan Shahbazkhani 3, Enzo Ierardi 4, Giuseppe Losurdo 4, Homayon Zojaji 1, Amirhoshang Mohammad Alizadeh 1, Nosratollah Naderi 1, Amir Sadeghi 1, Mohammad Reza Zali 1,*
PMCID: PMC4885617  PMID: 27252814

Abstract

There are overwhelming reports and descriptions about celiac associated disorders. Although there is a clear genetic association between celiac disease (CD) and some gastrointestinal disorders, there are controversial reports claiming an association between CD and Helicobacter pylori (H. pylori) infection. Different studies indicated the possible association between lymphocytic gastritis and both CD and H. pylori infection, although this evidence is not consistently accepted. Also it was shown that an increase in intraepithelial lymphocytes count is associated with both H. pylori infection and celiac disease. Therefore the following questions may raise: how far is this infection actually related to CD?, which are the underlying patho-mechanisms for these associations? what are the clinical implications? what is the management? and what would be the role of gluten free diet in treating these conditions? PubMed (PubMed Central), Ovid, ISI of web knowledge, and Google scholar were searched for full text articles published between 1985 and 2015. The associated keywords were used, and papers described particularly the impact of pathological and clinical correlation between CD and H. pylori infection were identified. In this review we tried to answer the above questions and discussed some of the recent developments in the pathological and clinical aspects of CD and H. pylori infection.

Keywords: Celiac disease, Helicobacter pylori, Pathological feature

INTRODUCTION

Celiac disease (CD) is a T-cell-mediated disorder, which is induced by gluten ingestion in genetically predisposed individuals.1 Different studies showed that the prevalence of CD is approximately 1% in many populations worldwide.2 New diagnostic tools increased the consciousness and improved the diagnosis of the disease, thus causing an apparent real increase in the incidence of CD.

CD is diagnosed by abnormal histology of duodenal biopsy specimens as well as with diagnostic tools, including serologic tests for antibodies against tissue transglutaminase (anti-tTG Ab) and deamidated gliadin peptide (DGP).3 In suspicious cases for example in first degree relatives of patients with CD and in patients with autoimmune disorders, evaluation of HLA-DQ2 and HLA-DQ8 haplotypes are useful tools.4 According to recent guidelines by Paediatric Gastroenterology Hepatology and Nutrition (ESPGHAN), clinical symptoms of CD and other gluten related disorders can be relieved by adherence to a gluten-free diet and a diagnosis can be made without biopsy taking in certain circumstances, especially in those cases with an increase value of anti-tTG antibodies (IgA) more than 10 time than upper limit.5

Helicobacter pylori (H. pylori), the causative agent in more than 90% of patients with gastroduodenal disorder, is responsible for many disorders ranging from asymptomatic histological chronic gastritis to some histologically important disorders such as peptic ulcer, upper gastrointestinal bleeding, primary gastric mucosa-associated lymphoid tissue (MALT) lymphoma, chronic gastritis with atrophy, intestinal metaplasia, and adenocarcinoma.6-9 To date there is no known pathogenic mechanism to explain these diverse abnormalities.

Although native immune inflammatory response is identified in both H. pylori infection and CD, systemic humoral immune reaction is also involved.10 Increased numbers of intestinal intraepithelial lymphocytes (IELs) and subsequently villous atrophy, are not specific histological findings in H. pylori infection or CD. They may be found in a large number of other disorders, such as Giardia infection, IgA deficiency, and Crohn’s disease.11,12 Patients with increased IELs without serology confirmation do not have CD, but those with positive serological tests and suggestive symptoms are considered as potential cases of CD.13,14

Various studies reported a high prevalence of H. pylori infection in patients with CD and vice versa.15-18 But others have failed to find any correlation to support this statement.19-25 Some studies reported that a clinical presentation like atrophic gastritis is common in patients with CD26, but others have found poor evidence to support this presentation.19

Different studies reported that number of intraepithelial lymphocytes in the duodenal mucosa are more likely to be increased in patients with H. pylori gastritis, and this can be controlled by the eradication of H. pylori, although epidemiological investigations have failed to show the association between gastritis and CD.20,21,24,27 Other reports have focused on H. pylori-related lymphocytic gastritis and anemia in patients with CD.18

The following keywords were selected and searched alone or in combination in PubMed (PMC central), Medline, and Google scholar for articles published in English, from January 1985 to October 2015: “celiac disease”, “pathogenesis”, “Helicobacter pylori”, “lymphocytic gastritis”, “lymphocytic duodenitis”, “intraepithelial lymphocytes”, “clinical presentation”, and “epidemiology.” Using the mentioned keywords, only those articles, which reported controversial issues on pathological and clinical aspects of CD and H. pylori infection were assessed.

Based on the above-reported controversial point of views, in this article we describe an updated review about pathological and clinical correlation between CD and H. pylori infection.

Lymphocytic gastritis

Lymphocytic gastritis (LG) is defined by the presence of 25-30 IELs per 100 epithelial cells, without accounting the mononuclear inflammatory cell infiltration of the lamina propria. Studies showed that LG may be associated with both CD and H. pylori infection even if this evidence is not unanimously recognized.10 LG was reported in 36-45% of children with CD, but H. pylori infection was reported only in 13% of patients.28-30 About 38% and 13% of LG cases were associated with CD and H. pylori gastritis respectively. A diagnosis of LG should stimulate the exploration for these two disorders.

Previous studies confirmed that LG was more common in H. pylori positive children than in H. pylori negative ones, both without CD.31 They reported that duodenal intraepithelial lymphocytosis persisted but LG counts decreased after treatment of H. pylori infection. In a study by Broide and colleagues on 40 patients who were candidate for endoscopy, only IELs positive for peculiar CD3 and CD8+ intraepithelial T-lymphocyte population increased significantly in CD patients with or without H. pylori infection.10 Drut and co-workers concluded that LG was associated with CD in children with IELs positive for CD8, but was not associated with substantial damage to the epithelial cells.32 Nenna and others suggested that exposure to gluten for long time was a possible trigger of LG.33 They evaluated gastric and duodenal mucosa of 226 patients with CD and 154 controls. LG was reported in 7% of the patients with CD and no control subjects, while H. pylori infection was found in 6 (2.7%) children with CD (16.7% had LG). In other two studies on children and adults, the prevalence of LG was reported 42% and 84%, respectively.34,35 Similar to Nenna and colleagues, Prasad and co-workers reported that the prevalence of H. pylori in patients with CD and LG was 6%.34 In contrast to previous studies, in 1999 Wu and colleagues showed that out of 103 patients with LG, 33% had concomitant CD compared with only 4.1% with H. pylori and therefore declined any association.36

Nielsen and co-workers recently supported these data and demonstrated that lymphocytic gastritis was not associated with active H. pylori infection.37 These inconsistent outcomes could also be attributable to different variability of H. pylori virulence genes. So, as demonstrated by Genta and colleagues, a particular attention must be paid to other causes of gastric inflammation, and CD must be taken into account when H. pylori-negative gastritis is confirmed.38-40

Lymphocytic duodenitis

In the duodenum, the increased number of IELs, lymphocytic duodenitis, can be a primary presentation of CD as well as the epiphenomenon of H. pylori infection itself.41,42 In accordance with the interpretations of Goldstein43, Memeo and colleagues, determined that the patterns of distribution of duodenal IELs in patients with H. pylori gastritis overlap to a significant range with the patterns described for CD.21 Remarkably Goldstein reported the non-gluten-sensitive groups with increased IELs, included patients with H. pylori gastritis.

Guz-Mark et al. proposed that in children with negative CD, lymphocytic duodenitis is common and is not expressively affected by H. pylori infection.44 However, this explanation is somehow doubtful as they have evaluated the children with functional recurrent abdominal pain as normal control group. Recent study by Simondi and others, showed that H. pylori infection is associated with an increase in IELs count in both patients with CD and in subjects with duodenal intraepithelial lymphocytosis.23 Losurdo and colleagues demonstrated that, during a 2-year follow-up of 81 patients affected by non-specific duodenal lymphocytosis, 5 (6.1%) were exclusively related to H. pylori infection.45 In contrast Ilus and co-workers reported that co-morbidities such as H. pylori gastritis did not contribute to the persistent intraepithelial lymphocytosis among patients with normal villous structure who adhere to a long-term strict gluten-free diet.46

Clinical presentation

Several reports have rejected any correlation between severe abnormal histology and severe clinical and typical presentation like diarrhea, abdominal pain, and malabsorption in patients with CD.23

In the study by Nielsen and colleagues, the most common presenting symptoms were GERD/reflux (35%), followed by abdominal pain (31%), and anemia (22%).37 Spee and co-workers undertook a meta-analysis of 38 studies to examine the relationship between H. pylori, functional recurrent abdominal pain, and other gastrointestinal symptoms in children.47 They concluded that H. pylori was not associated with functional recurrent abdominal pain.

In our previous study, out of 450 dyspeptic patients, 91.3% had histology-based evidence of H. pylori infection, and the most prevalent symptoms were abdominal discomfort (78%), bloating (71.1%), and heartburn (58%).18 Our recent study also confirmed the previous one and showed that among the 250 studied patients, 232 (93%) were H. pylori positive and high prevalent symptoms including abdominal discomfort (80%), and bloating (73%) were reported in the infected patients.25 In other study, on 226 children with CD, Nenna and colleagues, demonstrated that the most frequent symptoms were abdominal pain, diarrhea, abdominal distension, and poor weight gain.33

Aydogdu and colleagues, showed that bloating was more common at the time of admission of patients with CD and H. pylori gastritis and a gluten-free diet recovers the symptoms in all patients regardless of the presence of H. pylori infection.17 On the other hand, it has been shown that an increased number of IELs can be associated with a variety of other gastrointestinal disorders such as syphilis, hypertrophic gastropathy, Ménétrier’s disease, and Crohn’s disease.48-50

Epidemiology

Evidence suggests a controversial relationship between H. pylori infection and CD (Table 1). Few studies support their association and most of them decline any correlation. Lebwohl and colleagues, have recently proposed the hypothesis of decreased risk of CD in patients with H. pylori infection.22 In their cross-sectional study, gastric and duodenal biopsy samples were collected from 136,179 patients who underwent endoscopy. The authors found contrariwise association and showed that H. pylori was significantly prevalent in controls compared with patients with CD (8.8% vs 4.4% respectively, p<0.0001). Other recent study by Simondi et al.,23 did not show a significant difference in H. pylori infection between patients with CD (36%) and controls (41%).

Table 1 . Prevalence of celiac disease and H. pylori in different parts the world .

Country H.pylori (%) Celiac disease
Argentina 36-40 1:67-1:681
Australia 32 1:82-1:125
Brazil 63-66.5 1.66:1000
Bulgaria 52.6 2.65% (in IDDM patients)
Canada 23.1 0.9%
Colombia 60.1 1:67-1:681
Croatia 60.4-68 1:519
Czech Republic 33-48 1:218
Chile 43-92 1:67-1:681
Denmark 25.6 6.9:100000
Estonia 73.87 0.34%
France 16.7 1:940
Germany 9-75 0.3%
Hungary 59 1:166
India 12.76.2 0.3-1.04%
Iran 83-97 1:100
Ireland 43 1:300
Italy 13-67.9 1:106
Japan 29 1:20.000
Kazakhstan 79 NA
Korea 75 NA
Latvia 19 0.35-0.49%
Malaysia 26-55 NA
Mexico 41-90 1:67-1:681
Netherlands 16 1:198
Poland 34.5-78.5 1:404 (in children)
Portugal 52.5-80 1:134
Republic of
Belarus 		10-76 NA
Romania 69 3.9% (IDDM)
Russia 25-92 NA
Saudi Arabia 51 12:100
Singapore 27.9-48.1 NA
Spain 52-69 1:118
Tunisia 80-85 1:18-1:335
Turkey 42-100 1:87
UK 26-27.6 1:100
Ukraine 43 NA
USA 9-32 1:100-1:200
Yemen 82.2 1:18 (chronic diarrhea)
Zambia 61 1:18-1:335
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NA: not available; IDDM: insulin-dependent diabetes mellitus

Eighty-one children with CD and 81 matched children without CD were studied by Luzza and co-workers.51 The result of this study indicated that 18.5% of patients with CD and 17.3% of controls had H. pylori infection and therefore the prevalence and clinical presentation of H. pylori infection is not increased in children with CD. Similar prevalence have been reported by Diamanti et al.(89% vs. 97%) and Rostami-Nejad et al.(82% vs. 86%). Despite a high prevalence of H. pylori infection found in these two studies, the researchers did not find any relationship between H. pylori infection and CD in their study population.18,19 Crabtree and other specified that although H. pylori positivity in patients with CD increased with age, the percentage of H. pylori seropositivity was not different from similarly blood donors of the same geographic area.52 Also Nenna, Jozefczuk and their colleagues, recently confirmed that H. pylori infection was more prevalent in controls than in pediatric patients with CD.33,53 Lasa and co-workers, showed that out of 312 patients who underwent endoscopy, 12.5% of patients with CD compared with 30% of patients without CD were infected with H. pylori infection. They established that H. pylori infection was less frequent in patients with CD.54

On the other hand Konturek and colleagues reported a higher frequency of H. pylori in patients with CD than in controls (26% vs. 20%)16, while Ciacci and co-workers found that 21% of patients with CD and normal diet, 32% with gluten-free diet, and 55% of controls were infected by H. pylori.20 Similar findings were reported by Aydogdu and colleagues.17 Data of 96 children with CD and 235 control children who underwent endoscopy showed that 21.8% of patients with CD and 23.8% of controls were infected by H. pylor infection. They concluded that CD might be associated with H. pylori gastritis, and it affected only bloating as associated presentation.

CONCLUSION

H. pylori is a frequent etiological agent of upper gastrointestinal disorders such as gastritis and peptic ulcer.55 Even CD is a possible cause of gastric inflammatory conditions.38 Examinations of the correlation between H. pylori infection and CD have yielded discordant outcomes, undoubtedly because of the diverse frequency of H. pylori prevalence in different studies.15-20

Intraepithelial lymphocytosis may remain unchanged for a long time despite a strict gluten-free diet and normalization of the small intestinal villous structure.56 For this reason, a careful clinical and laboratory examination of cases of intraepithelial lymphocytosis must be performed to distinguish between gluten-related disorders (CD, gluten sensitivity or seronegative CD) and non-gluten-related conditions.57,58 Indeed, H. pylori gastritis, drugs such as non-steroidal anti-inflammatory drugs, olmesartan, proton pump inhibitors, and viral gastroenteritis are often associated with increasing intraepithelial lymphocytosis.59-61 It was illustrated that H. pylori infection may be the cause of pathogenesis of LG in patients with CD, and its treatment may reduce the number of IELs, and inflammation of the intestine, thus leading to an improvement of dyspeptic symptoms.31-36

In conclusion, different studies demonstrate the prevalence of H. pylori infection in CD population is similar to control subjects. Various investigations suggested that histological abnormalities including villous atrophy and endoscopic markers are similar in patients with and without H. pylori infection. Although some evidence show a potential preventive role of H. pylori in the pathogenesis of CD, further studies are needed to clarify some controversial points about this topic.

CONFLICT OF INTEREST:

The authors declare no conflict of interest related to this work.

Please cite this paper as:

Rostami-Nejad M, Ehsani-Ardakani MJ, Assadzadeh H, Shahbazkhani B, Ierardi E, Losurdo G, Zojaji H, Mohammad Alizadeh AH, Naderi N, Sadeghi M, Zali MR. Pathological and Clinical Correlation between Celiac Disease and Helicobacter Pylori Infection; a Review of Controversial Reports. Middle East J Dig Dis 2016;8:85-92. DOI: 10.151/1/ mejdd.2016.12

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