scholarly journals Extra-Gastric Manifestations of Helicobacter pylori Infection

2020 ◽  
Vol 9 (12) ◽  
pp. 3887
Author(s):  
Antonietta G. Gravina ◽  
Kateryna Priadko ◽  
Paola Ciamarra ◽  
Lucia Granata ◽  
Angela Facchiano ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Metabolic Diseases ◽  
Causative Factor ◽  
Deficiency Anemia ◽  
Gastric Diseases ◽  
Neurologic Diseases ◽  
Bowel Diseases ◽  
Inflammatory Bowel ◽  
H Pylori

Helicobacter Pylori (H. pylori) is a Gram-negative flagellated microorganism that has been extensively studied since its first isolation due to its widespread diffusion and association with numerous diseases. While the bacterium is proved to be a causative factor for a number of gastric diseases such as gastritis, gastric adenocarcinoma, and MALT-lymphoma, its role at other gastrointestinal levels and in other systems is being thoroughly studied. In this article, we reviewed the latest published clinical and laboratory studies that investigated associations of H. pylori with hematologic diseases such as Vitamin B12- and iron-deficiency anemia, primary immune thrombocytopenia, and with a number of dermatologic and ophthalmic diseases. In addition, the putative role of the bacterium in inflammatory bowel diseases, esophageal disorders, metabolic, diseases, neurologic diseases and allergy were outlined.

scholarly journals Helicobacter pylori infection and inflammatory bowel diseases

2021 ◽  
Vol 11 (1) ◽  
pp. 68-78
Author(s):  
Yu. P. Uspenskiy ◽  
N. V. Baryshnikova ◽  
A. N. Suvorov ◽  
A. V. Svarval
Keyword(s):  
Helicobacter Pylori ◽  
Gastric Mucosa ◽  
Inflammatory Bowel Diseases ◽  
Pathogenic Bacteria ◽  
T Cell Response ◽  
Aminosalicylic Acid ◽  
Bowel Diseases ◽  
Inflammatory Bowel ◽  
H Pylori

Helicobacter pylori is detected in the human intestine on average in 35% of clinical cases, but the question about its etiopathogenetic role in intestinal diseases has not been fully investigated. Many scientists study a relationship between the H. pylori persistence and development of various bowel diseases. Diverse viewpoints have been proposed regarding a potential link between H. pylori and inflammatory bowel diseases (IBD). Here we review the data from domestic and foreign studies aimed at examining potential role of H. pylori both as a trigger and protector resulting in the pathogenetic alterations leading to developing Crohn‘s disease and ulcerative colitis. The former is favored by the hypothesis wherein H. pylori may trigger IBD due to potential connection between extragastric infection and its direct damaging action as well as indirect effects contributing to the initiation of oxidative stress, autoimmune aggression and development of intestinal dysbiosis. In addition, the effects of enterohepatic Helicobacter spp. promoting IBD pathogenesis are discussed. The mechanisms underlying the protective role of H. pylori infection may be driven via differentially expressed acute and/or chronic local inflammatory mucosal response able to downmodulate systemic immune responses and suppress autoimmune reactions, as well as skewing host immune response from a pro-inflammatory Th1/Th17 cell-mediated towards regulatory T-cell response. Moreover, it was found that H. pylori may induce production of antibacterial peptides counteracting potentially pathogenic bacteria involved in IBD pathogenesis. In particular, it was found that IBD patients are dominated with moderate active antral gastritis coupled to atrophy, with the peak intensity observed in patients under 30 years of age. Intensity of intestinal metaplasia in the gastric mucosa of IBD patients accounted for by the duration of the disease course. Basal IBD therapy with 5-aminosalicylic acid lowers severity and activity of gastritis, degree of atrophy as well as magnitude H. pylori invasion in the gastric mucosa. There is evidence that 5-aminosalicylic acid-containing drugs may result in a so-called “spontaneous eradication” of H. pylori infection. Extended investigations are required to examine a role of H. pylori in IBD pathogenesis.

scholarly journals Dietary Composition Influences Incidence of Helicobacter pylori-Induced Iron Deficiency Anemia and Gastric Ulceration

2016 ◽  
Vol 84 (12) ◽  
pp. 3338-3349 ◽  
Author(s):  
Amber C. Beckett ◽  
M. Blanca Piazuelo ◽  
Jennifer M. Noto ◽  
Richard M. Peek ◽  
M. Kay Washington ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Iron Deficiency ◽  
Iron Deficiency Anemia ◽  
Gastric Ulceration ◽  
High Salt ◽  
Gastric Ulcers ◽  
Deficiency Anemia ◽  
Content Type ◽  
H Pylori

Epidemiologic studies have provided conflicting data regarding an association betweenHelicobacter pyloriinfection and iron deficiency anemia (IDA) in humans. Here, a Mongolian gerbil model was used to investigate a potential role ofH. pyloriinfection, as well as a possible role of diet, inH. pylori-associated IDA. Mongolian gerbils (eitherH. pyloriinfected or uninfected) received a normal diet or one of three diets associated with increasedH. pylorivirulence: high-salt, low-iron, or a combination of a high-salt and low-iron diet. In an analysis of all infected animals compared to uninfected animals (independent of diet),H. pylori-infected gerbils had significantly lower hemoglobin values than their uninfected counterparts at 16 weeks postinfection (P< 0.0001). The mean corpuscular volume (MCV) and serum ferritin values were significantly lower inH. pylori-infected gerbils than in uninfected gerbils, consistent with IDA. Leukocytosis and thrombocytosis were also detected in infected gerbils, indicating the presence of a systemic inflammatory response. In comparison to uninfected gerbils,H. pylori-infected gerbils had a higher gastric pH, a higher incidence of gastric ulcers, and a higher incidence of fecal occult blood loss. Anemia was associated with the presence of gastric ulceration but not gastric cancer. Infected gerbils consuming diets with a high salt content developed gastric ulcers significantly more frequently than gerbils consuming a normal-salt diet, and the lowest hemoglobin levels were in infected gerbils consuming a high-salt/low-iron diet. These data indicate thatH. pyloriinfection can cause IDA and that the composition of the diet influences the incidence and severity ofH. pylori-induced IDA.

scholarly journals Helicobacter pylori and Respiratory Diseases: 2021 Update

2021 ◽  
Vol 9 (10) ◽  
pp. 2033
Author(s):  
Marilena Durazzo ◽  
Alessandro Adriani ◽  
Sharmila Fagoonee ◽  
Giorgio Maria Saracco ◽  
Rinaldo Pellicano
Keyword(s):  
Helicobacter Pylori ◽  
Respiratory Diseases ◽  
Small Sample Size ◽  
Small Sample ◽  
Deficiency Anemia ◽  
Chronic Obstructive ◽  
Case Control Studies ◽  
Gastric Diseases ◽  
Medline Search ◽  
H Pylori

Helicobacter pylori (H. pylori) is a Gram-negative bacterium involved in the development of gastritis, peptic ulcer disease, gastric adenocarcinoma, and gastric mucosa-associated lymphoid tissue. Unexplained iron deficiency anemia, idiopathic thrombocytopenic purpura and vitamin B12 deficiency have also been related to H. pylori infection, whereas for other extra-gastric diseases, the debate is still open. In this review, we evaluate and discuss the potential involvement of H. pylori infection in the pathogenesis of several respiratory diseases. A MEDLINE search of all studies published in English from 1965 to 2021 was carried out. Controversial findings have been reported in patients with bronchial asthma, chronic obstructive pulmonary disease, bronchiectasis, lung cancer, tuberculosis, cystic fibrosis, and sarcoidosis. Most of the available literature is concerned with case-control studies based on seroprevalence, with a small sample size and low consideration of confounders, which represents a potential issue. So far, there is no clear evidence of a causal association between H. pylori infection and respiratory diseases, and larger studies with appropriate epidemiological design are required.

The Role of E-cadherin in Helicobacter pylori-Related Gastric Diseases

2019 ◽  
Vol 20 (1) ◽  
pp. 23-28
Author(s):  
Yunzhan Zhang ◽  
Danyan Li ◽  
Yunkai Dai ◽  
Ruliu Li ◽  
Yong Gao ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Gastric Mucosa ◽  
Precancerous Lesions ◽  
Research Literature ◽  
Gastric Diseases ◽  
H Pylori ◽  
The Relationship ◽  
E Cadherin

Background: Helicobacter pylori (H. pylori)-related gastric diseases are a series of gastric mucosal disorders associated with H. pylori infection. Gastric cancer (GC) is widely believed to evolve from gastritis and gastric ulcer. As an important adhesion molecule of epithelial cells, E-cadherin plays a key role in the development of gastric diseases. In this review, we aim to seek the characteristic of E-cadherin expression at different stages of gastric diseases. Methods: We searched plenty of databases for research literature about E-cadherin expression in H. pylori-related gastric diseases, and reviewed the relationship of E-cadherin and H. pylori, and the role of E-cadherin at different stages of gastric diseases. Results: H. pylori was shown to decrease E-cadherin expression by various ways in vitro, while most of clinical studies have not found the relationship between H. pylori and E-cadherin expression. It is defined that poor outcome of GC is related to loss expression of E-cadherin, but it is still unclear when qualitative change of E-cadherin expression in gastric mucosa emerges. Conclusion: Expression level of E-cadherin in gastric cells may be a consequence of injury factors and body’s selfrepairing ability. More studies on E-cadherin expression in gastric mucosa with precancerous lesions need to be performed, which may be potential and useful for early detection, prevention and treatment of GC.

scholarly journals Helicobacter pylori and Immune-mediated Disorders

2020 ◽  
Vol 20 (1) ◽  
pp. 29-37
Author(s):  
Jae Yong Park
Keyword(s):  
Helicobacter Pylori ◽  
Autoimmune Diseases ◽  
Allergic Diseases ◽  
Causative Factor ◽  
Autoimmune Disorders ◽  
Skin Disorders ◽  
Cross Sectional ◽  
Immune Mediated ◽  
H Pylori

Recently, many studies have reported the potential association of <i>Helicobacter pylori</i> (<i>H. pylori</i>) with various extragastric diseases. <i>H. pylori</i>, a major component of the gastric microbiota, is in symbiosis with humans. It is, therefore, assumed to potentially influence immune homeostasis in humans to some extent. There are several reports highlighting the possible association of <i>H. pylori</i> with allergic diseases. However, these were mainly based on cross-sectional or epidemiological studies. With a greater emphasis on the effects of human microbiota on host immunity and disease development, studies have attempted to explain the association between <i>H. pylori</i> infection and allergic diseases. Nevertheless, no concrete evidence for a causal relationship has been clearly demonstrated yet. The association of <i>H. pylori</i> infection with autoimmune disorders has also been reported in the literature. It has been hypothesized that environmental triggers act on genetically vulnerable hosts, leading to autoimmune disorders. The role of <i>H. pylori</i> infection as one of the triggers in autoimmune diseases has been explored previously. However, the results were conflicting and indistinct with respect to most autoimmune diseases. Similar findings were also detected in skin disorders where <i>H. pylori</i> infection was deemed to be a causative factor. The role of <i>H. pylori</i> in majority of the immune-mediated disorders or skin disorders remains controversial. In this review, the association of <i>H. pylori</i> with various immune-mediated disorders and skin disorders is discussed. The epidemiological, serological, and experimental evidences relevant to the aforementioned association are also addressed.

scholarly journals The role of Helicobacter pylori in preeclampsia and in gastric diseases in pregnant women

2020 ◽  
Vol 7 (7) ◽  
pp. 2097
Author(s):  
Jehan Sabah Hasan ◽  
Mohammed Ahmed Alshami
Keyword(s):  
Helicobacter Pylori ◽  
Pregnant Women ◽  
Epigastric Pain ◽  
Peptic Ulcers ◽  
Gastric Diseases ◽  
Number Of Patients ◽  
Mild Preeclampsia ◽  
Laboratory Investigations ◽  
H Pylori

Background: Helicobacter pylori is a gastric organism was first observed more than 100 years ago. It may cause chronic gastritis, peptic ulcers and gastric adenocarcinoma and lymphoma. It can produce some extragastric disorders including preeclampsia. This study aimed to focus on the importance of H. pylori and its relationship with preeclampsia and gastric illnesses in pregnant patients.Methods: This study includeed 100 pregnant women, half of them were healthy and the other half with preeclampsia. Patients with chronic medical illnesses were excluded. Data was collected and laboratory investigations were done including that for H. pylori. Oesophagogastroduodenoscopy then was done 6 weeks post-delivery or termination of pregnancy for symptomatic H. pylori positive women.Results: 50% of the total number were healthy, 17% had mild preeclampsia, 33% suffering from severe preeclampsia. Seropositivity for H. pylori is significantly higher in preeclampsia and significantly related to severity of preeclampsia and complications of pregnancy. Positive H. pylori test in stool was seen in (45%) of total number of patients. Epigastric pain persist in 41 (91%) of patients with positive H. pylori test in stool. Gastritis, duodenal ulcer, and gastric ulcer were found in 85.3%, 12.1% and 2.4% of symptomatic patients respectively.Conclusions: Significant correlation between Helicobacter pylori seropositivity and preeclampsia may indicate the benefit of using this parameter in the prediction and management of preeclampsia and its severity. H. pylori infection plays an important role in gastric pathologies in pregnant women that can be dealt with or may be prevented more efficiently in future. 

Gut Mycobiota and Fungal Metabolites in Human Homeostasis

2018 ◽  
Vol 20 (2) ◽  
pp. 232-240 ◽  
Author(s):  
Izabella Mogilnicka ◽  
Marcin Ufnal
Keyword(s):  
Wide Spectrum ◽  
Biological Effects ◽  
Fungal Species ◽  
Fungal Metabolites ◽  
Human Gut ◽  
Fecal Transplantation ◽  
Bacterial Microbiota ◽  
Bowel Diseases ◽  
Inflammatory Bowel

Background:Accumulating evidence suggests that microbiota play an important role in host’s homeostasis. Thus far, researchers have mostly focused on the role of bacterial microbiota. However, human gut is a habitat for several fungal species, which produce numerous metabolites. Furthermore, various types of food and beverages are rich in a wide spectrum of fungi and their metabolites.Methods:We searched PUBMED and Google Scholar databases to identify clinical and pre-clinical studies on fungal metabolites, composition of human mycobiota and fungal dysbiosis.Results:Fungal metabolites may serve as signaling molecules and exert significant biological effects including trophic, anti-inflammatory or antibacterial actions. Finally, research suggests an association between shifts in gut fungi composition and human health. Changes in mycobiota composition have been found in obesity, hepatitis and inflammatory bowel diseases.Conclusion:The influence of mycobiota and dietary fungi on homeostasis in mammals suggests a pharmacotherapeutic potential of modulating the mycobiota which may include treatment with probiotics and fecal transplantation. Furthermore, antibacterial action of fungi-derived molecules may be considered as a substitution for currently used antibacterial agents and preservatives in food industry.

Analysis of babA, cagE and cagA Genes in Helicobacter pylori from Upper Gastric Patients in the North of Iran

2019 ◽  
Vol 19 (3) ◽  
pp. 274-278 ◽  
Author(s):  
Saba Fakhrieh Asl ◽  
Mehrnaz Pourvahedi ◽  
Ali Mojtahedi ◽  
Mohammad Shenagari
Keyword(s):  
Helicobacter Pylori ◽  
Gastric Diseases ◽  
Specific Primers ◽  
The North ◽  
Different Types ◽  
North Of Iran ◽  
Gastric Biopsies ◽  
Pcr Method ◽  
Non Ulcer Dyspepsia ◽  
H Pylori

Objective:Helicobacter pylori is a Gram-negative bacterium which has a serious effect on up to half of the world’s population and has been related to different gastric diseases. The goal of this study was to assess the frequency of babA, cagE and cagA genotypes among H. pylori strains isolated from gastric biopsies of endoscopic patients in the north of Iran.Methods:The present study was performed on 90 strains of H. pylori isolated from patients with gastric diseases (Gastric ulcer (GU), Duodenal ulcer (DU), Gastritis (G), Non-ulcer dyspepsia (NUD) and Gastric adenocarcinoma (GC)). DNA was extracted from all isolated strains and PCR method was performed to detect the prevalence of babA2, cagE and cagA genes using specific primers.Results:Among 90 samples of H. pylori, babA2, cagE, and cagA genes were detected in 42.2%, 30% and 82.2% of strains respectively. The statistical analysis showed that the prevalence of cagA gene in GU, G, DU, and NUD was significantly higher than other genes. Moreover, cagA, and babA2 genes were significantly more prevalent in GC patients compared to cagE gene. Our isolates exhibited 8 distinct arrangements of virulence patterns. The occurrence of cagA (35.6%) was the most prevalent pattern followed by cagA/babA2 (20%) and cagA/babA2/cagE (14.4%).Conclusion:In summary, as first report from Guilan province in the north of Iran, we showed significant association between the presence of babA2, cagE, and cagA genes in different types of gastric disorders.

Role of MicroRNAs in Colon Cancer Progression and Metastasis

2020 ◽  
Vol 20 ◽  
Author(s):  
Shruthi Sanjitha Sampath ◽  
Sivaramakrishnan Venkatabalsubramanian ◽  
Satish Ramalingam
Keyword(s):  
Colon Cancer ◽  
Cancer Progression ◽  
Target Genes ◽  
Tumour Progression ◽  
Intestinal Barrier ◽  
Colon Cancer Progression ◽  
Bowel Diseases ◽  
Inflammatory Bowel ◽  
Novel Therapeutic Strategies

: MicroRNAs regulate gene expression at the posttranscriptional level by binding to the mRNA of their target genes. The dysfunction of miRNAs is strongly associated with the inflammation of the colon. Besides, some microRNAs are shown to suppress tumours while others promote tumour progression and metastasis. Inflammatory bowel diseases include Crohn’s disease and Ulcerative colitis which increase the risk factor for inflammation-associated colon cancer. MicroRNAs are shown to be involved in gastrointestinal pathologies, by targeting the transcripts encoding proteins of the intestinal barrier and their regulators that are associated with inflammation and colon cancer. Detection of these microRNAs in the blood, serum, tissues, faecal matter, etc will enable us to use these microRNAs as biomarkers for early detection of the associated malignancies and design novel therapeutic strategies to overcome the same. Information on MicroRNAs can be applied for the development of targeted therapies against inflammation-mediated colon cancer.

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