Immune Responses to Differentiated Forms of Helicobacter pylori in Children with Epigastric Pain

ABSTRACT Helicobacter pylori infection affects human populations of all ages. This gastric bacterium exists in spiral form and the reported viable but nonculturable coccoid form. The present study aims to examine the probable role of the coccoid form in H. pylori infection by comparing the seroprevalences of the spiral and the coccoid forms in children with epigastric pain. Four hundred eighty-nine children (mean age, 8.5 years) with epigastric pain formed the basis of this study. Five hundred ninety-nine schoolchildren of comparable ages and with no record of dyspepsia served as controls. The seroprevalence of antigens prepared from both morphological forms was examined by enzyme-linked immunosorbent assay. The results showed that 65 (13.3%) and 273 (55.8%) of 489 symptomatic children were seropositive for antigens of the H. pylori spiral and coccoid forms, respectively. In contrast, only 7.0% of the control group had elevated levels of immunoglobulin G antibodies against the spiral form, while 26.5% were positive for antibodies against the coccoid form. There were no significant differences between genders or among ethnic groups. The study showed a rise in seroprevalence corresponding with age: 7.1% for those ≤5 years to 21.4% for those ≥11 years. The seroprevalence of antigens of the H. pylori spiral and coccoid forms in children with epigastric pain was twofold higher than that in the control subjects. Interestingly, there was a fourfold increase in seropositivity for coccoid-form antigen compared to that for the spiral-form antigen among the symptomatic pediatric patients as well as the control group, indicating a possible infective role of the coccoid form of H. pylori in the pediatric patients with epigastric pain.

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Helicobacter pylori Recombinant CagA Regulates Th1/Th2 Balance in a BALB/c Murine Model

Advanced Pharmaceutical Bulletin ◽

10.34172/apb.2020.031 ◽

2020 ◽

Vol 10 (2) ◽

pp. 264-270

Author(s):

Nafiseh Paydarnia ◽

Behzad Mansoori ◽

Davoud Esmaeili ◽

Tohid Kazemi ◽

Mahyar Aghapour ◽

...

Keyword(s):

Helicobacter Pylori ◽

Enzyme Linked Immunosorbent Assay ◽

Control Group ◽

Chain Reaction ◽

Protein Levels ◽

Cytotoxin Associated Gene A ◽

Polymerase Chain ◽

H Pylori ◽

Antibody Levels

Purpose: Helicobacter pylori is recognized as one of the prevalent causes of human gastricinfection. In the present study, the role of mixed immunization with H. pylori lipopolysaccharide(LPS) and recombinant cytotoxin-associated gene A (rCagA) as a stimulator of host immuneresponses was determined. Methods: BALB/c mice were immunized with different formulations by the systemic administrationat 14-day intervals. The effects of the formulations plus CpG adjuvants were assessed before andpost-immunization in separated studies. Moreover, the expression of Th1/Th2 cytokines wasquantified in sera of immunized mice using reverse transcription polymerase chain reaction (RTPCR)test and the protein levels confirmed with enzyme linked immunosorbent assay (ELISA).Finally, the specific antibody levels in sera were studied by ELISA and the tendency of cellularresponse was examined by IgG1/IgG2a ratio. Results: Data of Western blotting verified the presence of constructed protein. Analysisof lymphocyte proliferation showed that CpG-conjugated rCagA increases lymphocytesproliferation compared to the control group. Also, it was shown that formulations containing LPSand rCagA promote a Th1 response indicated by interferon-gamma expression and induced Th1/Th2 balance. Additionally, the specific IgG1, total IgG and IgG2a levels elevated in response toall treatments. Ultimately, the IgG2a/IgG1 ratio in the mice immunized with rCagA-containingformulations increased. Conclusion: These results indicated that rCagA protein carried with CpG adjuvant not onlymaintained its antigenicity throughout the experiment but also induced robust Th1-biasedimmune responses. Therefore, it holds promise for the production of an efficient vaccine againstH. pylori infection. <br />

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The rod-to-coccoid body transformation in cultures of Helicobacter pylori

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100160686 ◽

1990 ◽

Vol 48 (3) ◽

pp. 626-627

Author(s):

A. R. Crooker ◽

W. G. Kraft ◽

T. L. Beard ◽

M. C. Myers

Keyword(s):

Helicobacter Pylori ◽

Growth Cycle ◽

Negative Bacterium ◽

Body Formation ◽

Coccoid Form ◽

Spiral Form ◽

Prolonged Culture ◽

H Pylori ◽

Upper Gastrointestinal

Helicobacter pylori is a microaerophilic, gram-negative bacterium found in the upper gastrointestinal tract of humans. There is strong evidence that H. pylori is important in the etiology of gastritis; the bacterium may also be a major predisposing cause of peptic ulceration. On the gastric mucosa, the organism exists as a spiral form with one to seven sheathed flagella at one (usually) or both poles. Short spirals were seen in the first successful culture of the organism in 1983. In 1984, Marshall and Warren reported a coccoid form in older cultures. Since that time, other workers have observed rod and coccal forms in vitro; coccoid forms predominate in cultures 3-7 days old. We sought to examine the growth cycle of H. pylori in prolonged culture and the mode of coccoid body formation.

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Serological evidence of association between Helicobacter pylori infection and coronary artery disease

African Journal of Clinical and Experimental Microbiology ◽

10.4314/ajcem.v21i2.2 ◽

2020 ◽

Vol 21 (2) ◽

pp. 88-96

Author(s):

S.M. EL-Ageery ◽

N.S. Gouda ◽

I.M. Fawzy ◽

A. Bahy-Eldeen ◽

R. Mahmoud

Keyword(s):

Coronary Artery Disease ◽

Helicobacter Pylori ◽

Coronary Artery ◽

Density Lipoprotein ◽

Enzyme Linked Immunosorbent Assay ◽

Control Group ◽

Serological Evidence ◽

Autoimmune Reaction ◽

Artery Disease ◽

H Pylori

Background: Studies have reported relationship between chronic Helicobacter pylori infection and coronary artery disease (CAD). The cytotoxin-associated gene A product (CagA) is an immunodominant protein which indicates infection with virulent H. pylori strains. Significant associations of CagA-positive H. pylori strains with coronary artery disorders have been widely reported. H. pylori is also known to produce different heat shock proteins (HSPs) which can stimulate the production of specific antibody against microbial proteins and capable of eliciting autoimmune reaction against human tissue expressing HSPs such as vascular endothelial cells. The objectives of this study are to investigate the association between H. pylori and CagA with coronary atherosclerosis and CAD, and to determine the possible role of H. pylori HSP60 protein in increasing the risk of CAD development. Methods: This study included 70 patients with stable angina and 70 age and gender-matched controls. Each group was evaluated by clinical history, physical examination, cardiac echocardiography (ECHO) and electrocardiography (ECG) with and without exercise. Fasting blood glucose, total cholesterol (TC), low density lipoprotein (LDL), high density lipoprotein (HDL) and triglycerides (TG) were estimated by automated enzymatic methods. H. pylori IgG, CagA IgG and HSP60 IgG were measured by enzyme-linked immunosorbent assay (ELISA) for both groups. Results: The seroprevalence of H. pylori infection was high in both groups; 75.7% in case and 68.6% in control (p=0.346). Serum IgG levels were significantly higher for CagA (p=0.028) and HSP60 (p<0.001) in cases than in controls. There was significant association between H. pylori and CagA IgGs in cases (p=0.007) but no association in controls (p=0.700). Higher HSP60 IgG level was significantly associated with both positive H. pylori IgG (p<0.001) and CagA IgG (p<0.001) in cases but no significant association was found with H. pylori (p=0.815) or CagA (p=0.332) IgG levels in the control group. Serum values were significantly higher for TC (p<0.001), TG (p<0.001) and LDL (p=0.004) while value for HDL was significantly lower (p<0.001) in H. pylori IgG-positive subjects (case and control). Conclusion: There is serological evidence that H. pylori infection may pose a significant risk factor for CAD. Since H. pylori can be eliminated by specific treatment, this may be a good preventive approach for CAD.Key words: H. pylori, coronary artery disease, CagA, HSP60, serology.

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Seroprevalence of Helicobacter pylori infection in patients with chronic nonspecific pharyngitis: preliminary study

The Journal of Laryngology & Otology ◽

10.1017/s0022215107006743 ◽

2007 ◽

Vol 122 (1) ◽

pp. 61-64 ◽

Cited By ~ 6

Author(s):

İ Aladag ◽

Y Bulut ◽

M Guven ◽

A Eyibilen ◽

K Yelken

Keyword(s):

Helicobacter Pylori ◽

Treatment Strategies ◽

Enzyme Linked Immunosorbent Assay ◽

Control Group ◽

Control Groups ◽

Chi Square ◽

Control Subjects ◽

The Difference ◽

H Pylori ◽

And Control

AbstractBackground and objectives:Chronic nonspecific pharyngitis is a chronic inflammation of the pharynx. It is found worldwide, and treatment is difficult. The underlying aetiopathogenesis is still controversial. The aim of this study was to investigate Helicobacter pylori seroprevalence in chronic nonspecific pharyngitis patients without other possible causative factors for chronic pharyngeal irritation and without H pylori gastric mucosal infection.Materials and methods:Forty-one patients with symptoms of chronic nonspecific pharyngitis and 30 healthy control subjects were enrolled in this prospective, controlled, clinical study. In both study and control groups, selected patients were shown to have gastric mucosa uninfected by H pylori, as demonstrated by the 14C-urea breath test. Comprehensive otorhinolaryngological examination did not elicit any factor contributing to the chronic pharyngeal complaint. Serum H pylori immunoglobulin G antibody titres were assayed using serum enzyme-linked immunosorbent assay. The difference between the study and control groups was analysed by the chi-square test (the likelihood ratio was used).Results:Thirty-two of the 41 patients (78 per cent) and 14 of the 30 control subjects (46.7 per cent) were found to be H pylori positive. Patients with chronic nonspecific pharyngitis were found to have a significantly higher rate of H pylori seropositivity than the control group (p = 0.016).Conclusion:These data may be important in developing future treatment strategies for chronic nonspecific pharyngitis.

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Effects of cinnamon extract on complications of treatment and eradication of Helicobacter pylori in infected people

Journal of Herbmed Pharmacology ◽

10.15171/jhp.2020.08 ◽

2020 ◽

Vol 9 (1) ◽

pp. 55-60

Author(s):

Ghazal Imani ◽

Alireza khalilian ◽

Dara Dastan ◽

Behzad Imani ◽

Maryam Mehrpoya

Keyword(s):

Helicobacter Pylori ◽

Drug Treatment ◽

Clinical Symptoms ◽

Epigastric Pain ◽

Control Group ◽

Blurred Vision ◽

Infected People ◽

Cinnamon Extract ◽

H Pylori ◽

Metallic Flavor

Introduction: Treatment of Helicobacter pylori has various side effects like antibiotic resistance. The purpose of this study was to evaluate the effects of cinnamon extract on complications of treatment and eradication of H. pylori in infected people. Methods: In this randomized clinical trial, a total of 98 eligible healthy and H. pylori-infected patients approved by esophageal endoscopy were selected. The cinnamon group received multi-drug treatment including clarithromycin, amoxicillin and pantoprazole as well as a cinnamon extract capsule. The control group received multi-drug treatment and a 40 mg starch capsule. In order to analyze the cinnamon extract efficacy, the urea breath test (UBT) was performed 3 months after the start of treatment. Clinical symptoms were evaluated by a questionnaire at the beginning (day of 0), 7 days and 14 days after starting treatment. Results: The clinical symptoms such as nausea, vomiting, diarrhea, constipation, blurred vision, headache, metallic flavor, epigastric pain, burp, and appetite were significantly reduced in the cinnamon group (P < 0.05). The odds ratio exhibited a higher eradication rate of H. pylori in the cinnamon group (73.47% in the cinnamon group compared to 53.06% in the control group) (P = 0.036). Conclusion: Cinnamon as assisted therapy is able to alleviate the disease and reduce the complications of H. pylori treatment.

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ON THE POSSIBLE PARTICULARITY OF HELICOBACTER PYLORI INFECTION TO GALLSTONE DISEASE

Hygiene and Sanitation ◽

10.18821/0016-9900-2018-97-11-1076-79 ◽

2018 ◽

Vol 97 (11) ◽

pp. 1076-1079

Author(s):

Serafima V. German ◽

A. V. Modestova ◽

I. E. Zykova ◽

I. P. Bobrovnitsky ◽

M. Yu. Yakovlev

Keyword(s):

Helicobacter Pylori ◽

Virulent Strain ◽

Gallstone Disease ◽

Cumulative Risk ◽

Bacterial Pathogen ◽

Enzyme Linked Immunosorbent Assay ◽

Positive Strain ◽

Working People ◽

H Pylori

Introduction. Up to now, it has not been established whether Helicobacter pylori, the most common bacterial pathogen of human, is involved in cholelithiasis. Material and Methods. Based on the analysis of prophylactic medical examination of working people in the Moscow region, the determination the pyloric Helicobacter infection and assessment of the virulence of bacteria there were studied the associations of H. pylori infection and gallstones. The infection was detected by the presence of serum specific antibodies of IgG class, the virulence of the strain H. pylori - by the presence of total antibodies to the protein associated with the cytotoxic gene CagA. There was used enzyme-linked immunosorbent assay. The study included 1,487 people, 931 men and 556 women aged 21-77 years. Results. The H. pylori infection was detected in 1348 (90,6%), CagA protein in - 392 (56.2 %) cases. Gallstones were diagnosed in 72 patients, 21 men (2.3%) and 51 women (9.2%), 67 were seropositive (5% of all infected) and 5 - seronegative (3.6% uninfected). In cholelithiasis cases, the presence of CagA positive strain of H. pylori was investigated in 35 patients. A virulent strain of bacteria was detected in 26 cases (74%), much more often than in the rest examined persons. Conclusion. There were no statistically significant differences in the incidence of cholelithiasis in infected H. pylori and non-infected individuals. A significantly higher prevalence of infection with pathogenic strains of H. pylori in patients with gallstones was found in comparison with the whole group of examined patients, that indicates to the favor of possible involvement of H. pylori infection in this pathology. Confirmation of the role of H. pylori infection as a cumulative risk factor for the gallstones cholecystitis, as well as for other extragastral pathologies, may have an epidemiological, prophylactic, clinical application, due to its widespread prevalence. Further research is needed.

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The role of T helper 17 cells in Helicobacter pylori associated chronic gastritis

10.51429/ejmm30316 ◽

2021 ◽

Vol 30 (3) ◽

pp. 119-126

Author(s):

Hanan E. Alrashidi ◽

Safaa M. EL-Ageery ◽

Iman M. Fawzy ◽

Ahmad Bahy-Eldeen ◽

Rasha Mahmoud ◽

...

Keyword(s):

Helicobacter Pylori ◽

Chronic Gastritis ◽

Enzyme Linked Immunosorbent Assay ◽

Control Group ◽

Case Group ◽

T Helper ◽

T Helper 17 ◽

Th 17 ◽

Tnf Α ◽

H Pylori

Background: T helper 17 (Th-17) cell, a proinflammatory subset of CD4 T cells, have an essential role in immunity against Helicobacter pylori (H. pylori) infection. Objectives: This study aimed to evaluate expression of selected Th-17 cells associated cytokines (IL17, IL-21, IL-22, IL-23, IL-26 and TNF-α) in H. pylori-infected patients and to recognize their responsibility in H. pylori associated chronic gastritis with different severity. Methodology: This study is a case control study. The case group included 25 H. pyloripositive patients suffering from chronic gastritis. The control group included 25 age and sex-matched healthy individuals without any dyspeptic symptoms and negative for H. pylori. Infection with H. pylori in all participants was determined by detection of H. pylori stool antigen by enzyme-linked immunosorbent assay (ELISA) kit. Certain cytokines expression (IL-17, IL-21, IL-22, IL-23, IL-26 and TNF-α) in serum samples from all participants were tested using ELISA. Results: Comparing the serum cytokines expression in cases and controls, IL-17, IL-21 IL-23 and TNF-α were significantly higher in cases while IL-22 and IL-26 were higher in cases but not statistically significant. Both serum IL-17 and TNF-α expressions were statistically significant higher in cases with moderate or severe forms of chronic gastritis than in cases with mild form of chronic gastritis. However, the levels of IL-21, IL-22, IL-23 and IL-26 showed insignificant variation regarding chronic gastritis severity. Conclusion: Th-17 cells are responsible for the pathogenesis of H. pylori infection and the severity of gastritis. So, down regulation of Th-17 cells associated cytokines offers a promising therapy to diminish H. pylori associated gastritis.

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Helicobacter pylori Infection: Clinical, Endoscopic, and Histological Findings in Lebanese Pediatric Patients

International Journal of Pediatrics ◽

10.1155/2020/4648167 ◽

2020 ◽

Vol 2020 ◽

pp. 1-5

Author(s):

F. AL Kirdy ◽

M. Rajab ◽

N. El-Rifai

Keyword(s):

Helicobacter Pylori ◽

Gastrointestinal Endoscopy ◽

Pediatric Patients ◽

Epigastric Pain ◽

Demographic Data ◽

Upper Gastrointestinal Endoscopy ◽

Histopathological Findings ◽

Increased Risk ◽

H Pylori ◽

Upper Gastrointestinal

Background. Helicobacter pylori (H. pylori) is a common and universally distributed bacterial infection. However, in children, active gastritis and ulcer are rarely seen. Objectives. The aims of this study were to establish the prevalence of H. pylori infection and to compare the clinical, endoscopic, and histopathological findings between infected and noninfected pediatric patients at Makassed General Hospital. Methods. Patients aged between 1 month and 17 years who underwent upper gastrointestinal endoscopy from January 2011 to January 2017 were included. The diagnosis of H. pylori was confirmed by a CLO test and/or its presence on biopsy specimens. Demographic data, clinical characteristics, endoscopic and histopathological findings, and gastritis score were recorded retrospectively. Results. During the study period, 651 children underwent upper gastrointestinal endoscopy. The main indication was abdominal pain (61%). The prevalence of H. pylori infection was 16.5%. The infection was most commonly seen among children aged between 6 and 10 years (43%). A large number of family members were associated with increased risk of infection (4.8±1.5 versus 5.2±1.8; p<0.05). Epigastric pain was more associated with H. pylori (61.3% versus 14.6% in noninfected patients; p<0.05). Nodular gastritis was commonly seen in infected patients (41.5% vs. 7.9%; p<0.05). Mild and moderate gastritis was seen more in infected versus noninfected patients (mild: 53.8% vs. 14%; moderate: 27.4% vs. 2.4%, respectively). Conclusion. Although epigastric pain was associated with H. pylori, other diagnoses should be considered since the infection are rarely symptomatic in children. Antral nodularity was associated with H. pylori infection; however, its absence does not preclude the diagnosis.

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Chemokines in the gastric mucosa in Helicobacter pylori infection

Gut ◽

10.1136/gut.42.5.609 ◽

1998 ◽

Vol 42 (5) ◽

pp. 609-617 ◽

Cited By ~ 138

Author(s):

Y Yamaoka ◽

M Kita ◽

T Kodama ◽

N Sawai ◽

T Tanahashi ◽

...

Keyword(s):

Helicobacter Pylori ◽

Gastric Mucosa ◽

Expression Patterns ◽

Enzyme Linked Immunosorbent Assay ◽

Biopsy Specimens ◽

Inflammatory Protein ◽

Polymerase Chain ◽

H Pylori ◽

Macrophage Inflammatory Protein

Background—Although chemokines have been suggested to play an important role in Helicobacter pyloriassociated gastritis, few studies have investigated the role of chemokines other than interleukin 8 (IL-8) in gastric mucosa.Aims—To investigate the expression and production patterns of various chemokines using gastric biopsy specimens.Methods—In 192 patients, expression patterns of C-X-C chemokines (IL-8 and growth regulated α (GROα)) and C-C chemokines (regulated on activation, normal T cell expressed and presumably secreted (RANTES), monocyte chemotactic and activating factor (MCAF), macrophage inflammatory protein 1α (MIP-1α), and MIP-1β) were examined using reverse transcription polymerase chain reaction (RT-PCR) and enzyme linked immunosorbent assay (ELISA).cagA gene was identified using PCR.Results—H pylori infection was associated with increased rates of expression of mRNA for IL-8, GROα, RANTES, and MIP-1α and with increased levels of mucosal IL-8 and GROα. IL-8 and GROα levels correlated with the density of H pylori in both the antrum and corpus. The levels of these chemokines correlated with cellular infiltration in the antrum but not the corpus. cagA gene positive H pyloriinfection was associated with increased rates of expression of mRNA for IL-8 and GROα and with increased levels of these chemokines.Conclusion—H pylori infection is associated with increased expression rates and production of C-X-C chemokines (IL-8 and GROα), but not with increased production of C-C chemokines. Although H pylori infection is associated with increased C-X-C chemokines in the antrum and corpus, there is a difference in the inflammatory response between these two areas of the stomach.

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Helicobacter pylori and rosacea

Eastern Mediterranean Health Journal ◽

10.26719/2003.9.1-2.167 ◽

2003 ◽

Vol 9 (1-2) ◽

pp. 167-171

Author(s):

S. Zandi ◽

S. Shamsaddini ◽

M. J. Zahedi ◽

M. Hyatbaksh

Keyword(s):

Helicobacter Pylori ◽

Method Comparison ◽

Test Group ◽

Enzyme Linked Immunosorbent Assay ◽

Control Group ◽

Igg Antibody ◽

Serological Tests ◽

Serological Examination ◽

Antibody Titres ◽

H Pylori

Recent reports have suggested an increased prevalence of Helicobacter pylori infection in patients with rosacea, with some evidence of dermatological improvement in patients treated with antibiotics for this infection. Our study investigates the prevalence of H. pylori infection in rosacea patients in Kerman. Serological examination was done for 29 patients with classical identification of rosacea using the enzyme-linked immunosorbent assay IgG antibody method. Comparison of antibody titres with those of a control group revealed that the prevalence of positive serological tests for H. pylori was significantly higher in the test group. This supports the suggestion of some form of relationship between rosacea and H. pylori infection, though further investigations with larger sample sizes are required for a definite conclusion

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