Displaying publications 61 - 80 of 81 in total

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  1. Ansari S, Yamaoka Y
    Toxins (Basel), 2019 Nov 19;11(11).
    PMID: 31752394 DOI: 10.3390/toxins11110677
    Helicobacter pylori colonizes the gastric epithelial cells of at least half of the world's population, and it is the strongest risk factor for developing gastric complications like chronic gastritis, ulcer diseases, and gastric cancer. To successfully colonize and establish a persistent infection, the bacteria must overcome harsh gastric conditions. H. pylori has a well-developed mechanism by which it can survive in a very acidic niche. Despite bacterial factors, gastric environmental factors and host genetic constituents together play a co-operative role for gastric pathogenicity. The virulence factors include bacterial colonization factors BabA, SabA, OipA, and HopQ, and the virulence factors necessary for gastric pathogenicity include the effector proteins like CagA, VacA, HtrA, and the outer membrane vesicles. Bacterial factors are considered more important. Here, we summarize the recent information to better understand several bacterial virulence factors and their role in the pathogenic mechanism.
    Matched MeSH terms: Peptic Ulcer/microbiology
  2. Alhady SM, Buttery JE
    Med J Aust, 1970 Jan 31;1(5):218-9.
    PMID: 4908222
    Matched MeSH terms: Peptic Ulcer/diagnosis*
  3. Dhiyaaldeen SM, Amin ZA, Darvish PH, Mustafa IF, Jamil MM, Rouhollahi E, et al.
    BMC Vet Res, 2014;10:961.
    PMID: 25551777 DOI: 10.1186/s12917-014-0303-7
    Non-steroidal anti-inflammatory drugs (NSAIDs) can result in peptic ulcer disease (PUD) which is a common condition worldwide. The aim of this study was to evaluate the antiulcer properties of (1-(4-hydroxy-phenyl)-3-m-tolyl-propenone) (HPTP) chalcone in rats using indomethacin as ulcerogenic agent.
    Matched MeSH terms: Peptic Ulcer/chemically induced*; Peptic Ulcer/prevention & control
  4. Goh KL
    J Gastroenterol Hepatol, 1997 Jun;12(6):S29-35.
    PMID: 9195409
    The aim of the present study was to determine the risk factors for Helicobacter pylori in a dyspeptic Malaysian population. A cross-sectional survey of 1060 consecutive patients presenting with dyspepsia at the Endoscopic Unit, University Hospital, Kuala Lumpur, Malaysia from January 1994 to July 1995 was undertaken. All patients answered a detailed questionnaire and underwent endoscopy, with two antral biopsies taken for diagnosis of H. pylori using a rapid urease test. An overall H. pylori prevalence of 49.0% was recorded. Helicobacter pylori prevalence in relation to the major endoscopic diagnoses were as follows: non-ulcer dyspepsia (NUD) 31.2%; duodenal ulcer (DU) 91.4%; and gastric ulcer (GU) 74.1%. The prevalence among the races were as follows: Malay 16.4%; Chinese 48.5%; and Indians 61.8%. Multiple logistic regression analysis identified the following as independent risk factors: > 45 years old 1.5 (1.1,2.0); male gender 1.6 (1.2,2.1); ethnic group: Chinese 2.5 (1.7,3.7); Indians 4.9 (3.2,7.5); level of education: low 2.3 (1.5,3.5); middle 1.7 (1.1,2.6); and smoking 1.6 (1.2,2.3). Analysis was also performed on DU, GU and non-UD patients separately; in both DU and GU patients, H. pylori prevalence was high regardless of age, sex, race or level of education. However, in DU patients, Indian race had an independent risk factor (Odds ratio = 7.8 (1.2,48.4)). The findings in the NUD group reflected the findings in the ¿all patients' group; > 45 years old, male gender, Indian and Chinese race, and low level of education were also significant, independent risk factors. The overall differences in H. pylori prevalence between the different subgroups were mainly due to differences in the NUD group. The increased risk of H. pylori infection in Chinese and Indians points to either an inherent ethnic genetic predisposition or to socio-cultural practices peculiar to the particular race which may be responsible for transmission of the infection.
    Matched MeSH terms: Peptic Ulcer/complications; Peptic Ulcer/epidemiology*
  5. Ansari S, Yamaoka Y
    Int J Mol Sci, 2020 Oct 08;21(19).
    PMID: 33050101 DOI: 10.3390/ijms21197430
    Helicobacter pylori causes persistent infection in the gastric epithelium of more than half of the world's population, leading to the development of severe complications such as peptic ulcer diseases, gastric cancer, and gastric mucosa-associated lymphoid tissue (MALT) lymphoma. Several virulence factors, including cytotoxin-associated gene A (CagA), which is translocated into the gastric epithelium via the type 4 secretory system (T4SS), have been indicated to play a vital role in disease development. Although infection with strains harboring the East Asian type of CagA possessing the EPIYA-A, -B, and -D sequences has been found to potentiate cell proliferation and disease pathogenicity, the exact mechanism of CagA involvement in disease severity still remains to be elucidated. Therefore, we discuss the possible role of CagA in gastric pathogenicity.
    Matched MeSH terms: Peptic Ulcer/metabolism; Peptic Ulcer/microbiology*
  6. Goh KL, Peh SC, Parasakthi N, Wong NW, Tan KK, Lo YL
    Am J Gastroenterol, 1994 Oct;89(10):1789-92.
    PMID: 7942668
    OBJECTIVES: Our objectives were to determine the effect of dual therapy with omeprazole and amoxicillin and of triple therapy with omeprazole, amoxicillin, and metronidazole in the eradication of Helicobacter pylori (HP) and to study the long-term results of eradication in these patients.
    METHODS: A prospective, randomized, controlled trial was performed. Patients who were recruited had unequivocal evidence of HP infection based on culture, histology, rapid urease test, and Gram's stain of a tissue smear. Eradication was defined as the absence of bacteria in all tests performed on both corpus and antral biopsies.
    RESULTS: The infection was eradicated in 15 of 19 (78.9%) patients randomized to receive dual therapy and in 19 of 22 (86.4%) patients who received triple therapy. We followed the course of 30 patients in whom HP had been eradicated for a prolonged term (up to 12 months). All remained clear of HP. Twenty-five of 28 patients (89.3%) with duodenal ulcers in whom HP was successfully eradicated remained healed at 12 months. Fewer side effects were reported among patients who received the dual therapy.
    CONCLUSIONS: Combination therapy with omeprazole and amoxicillin with or without metronidazole is effective in the eradication of HP. In particular, the dual therapy regimen with amoxicillin is not only effective but is also well tolerated by patients.
    Matched MeSH terms: Peptic Ulcer/drug therapy; Peptic Ulcer/microbiology
  7. Rehvathy V, Tan MH, Gunaletchumy SP, Teh X, Wang S, Baybayan P, et al.
    Genome Announc, 2013;1(5).
    PMID: 24051312 DOI: 10.1128/genomeA.00687-13
    Helicobacter pylori causes human gastroduodenal diseases, including chronic gastritis and peptic ulcer disease. It is also a major microbial risk factor for the development of gastric adenocarcinoma and mucosa-associated lymphoid tissue (MALT) lymphoma. Twenty-one strains with different ethnicity, disease, and antimicrobial susceptibility backgrounds were sequenced by use of Illumina HiSeq and PacBio RS platforms.
    Matched MeSH terms: Peptic Ulcer
  8. Leow AH, Lim YY, Liew WC, Goh KL
    Aliment Pharmacol Ther, 2016 Apr;43(7):831-7.
    PMID: 26847417 DOI: 10.1111/apt.13550
    Marked epidemiological changes in upper gastrointestinal diseases and Helicobacter pylori infection have taken place in the Asian Pacific region. In particular, differences with respect to race in the multiracial Asian population in Malaysia have been important and interesting.
    Matched MeSH terms: Peptic Ulcer/diagnosis; Peptic Ulcer/ethnology; Peptic Ulcer/microbiology
  9. Moayyedi P, Eikelboom JW, Bosch J, Connolly SJ, Dyal L, Shestakovska O, et al.
    Gastroenterology, 2019 08;157(2):403-412.e5.
    PMID: 31054846 DOI: 10.1053/j.gastro.2019.04.041
    BACKGROUND & AIMS: Antiplatelets and anticoagulants are associated with increased upper gastrointestinal bleeding. We evaluated whether proton pump inhibitor therapy could reduce this risk.

    METHODS: We performed a 3 × 2 partial factorial double-blind trial of 17,598 participants with stable cardiovascular disease and peripheral artery disease. Participants were randomly assigned to groups given pantoprazole 40 mg daily or placebo, as well as rivaroxaban 2.5 mg twice daily with aspirin 100 mg once daily, rivaroxaban 5 mg twice daily, or aspirin 100 mg alone. The primary outcome was time to first upper gastrointestinal event, defined as a composite of overt bleeding, upper gastrointestinal bleeding from a gastroduodenal lesion or of unknown origin, occult bleeding, symptomatic gastroduodenal ulcer or ≥5 erosions, upper gastrointestinal obstruction, or perforation.

    RESULTS: There was no significant difference in upper gastrointestinal events between the pantoprazole group (102 of 8791 events) and the placebo group (116 of 8807 events) (hazard ratio, 0.88; 95% confidence interval [CI], 0.67-1.15). Pantoprazole significantly reduced bleeding of gastroduodenal lesions (hazard ratio, 0.52; 95% confidence interval, 0.28-0.94; P = .03); this reduction was greater when we used a post-hoc definition of bleeding gastroduodenal lesion (hazard ratio, 0.45; 95% confidence interval, 0.27-0.74), although the number needed to treat still was high (n = 982; 95% confidence interval, 609-2528).

    CONCLUSIONS: In a randomized placebo-controlled trial, we found that routine use of proton pump inhibitors in patients receiving low-dose anticoagulation and/or aspirin for stable cardiovascular disease does not reduce upper gastrointestinal events, but may reduce bleeding from gastroduodenal lesions. ClinicalTrials.gov ID: NCT01776424.

    Matched MeSH terms: Peptic Ulcer/chemically induced; Peptic Ulcer/epidemiology; Peptic Ulcer/prevention & control*
  10. Qader AQ, Abdul Hamid H
    Radiol Case Rep, 2021 Jul;16(7):1907-1911.
    PMID: 34093935 DOI: 10.1016/j.radcr.2021.04.059
    Gastric volvulus is an uncommon disorder with an unknown incidence, unless it stays in the back of the diagnostician's mind, diagnosis of gastric volvulus, which can have significant morbidity and mortality associated with it, can be easily missed and can present either in the acute or chronic setting with variable symptoms. When it occurs in the acute scenario, patients present with severe epigastric pain and retching without vomiting. Together with inability to pass nasogastric tube, they constitute Borchardt's triad. The presence of a hiatal hernia with persistent vomiting despite initial antiemetic treatment should trigger one to think of gastric volvulus, despite the patient appearing very stable. We report a case which presented in our hospital with abdominal pain and vomiting. As Oesophagogastroduodenoscopy shows hiatal hernia and peptic ulcer. Primary gastric volvulus occurs in the absence of any defect in the diaphragm or adjacent organ pathology and may be caused by weakening of gastric supports. As conclusion; Gastric volvulus is a surgical case, requiring early diagnosis and aggressive management, as a delay results into complications like gangrene and perforation which substantially increase the morbidity and mortality in these patients, and contrast enhanced computed tomography (CECT) is the best modality for diagnosis of gastric volvulus.
    Matched MeSH terms: Peptic Ulcer
  11. Alfizah, H., Rizal, A.M., Isa, M.R., Aminuddin, A., Jasmi, A.Y., Ramelah, M.
    Medicine & Health, 2010;5(1):13-21.
    MyJurnal
    Helicobacter pylori has been implicated as an aetiologic agent for type B chronic gastritis, peptic ulcer and gastric cancer. It is considered the most common bacterial infection in the world with approximately 50% of the population being infected. The majority of infected individuals are asymptomatic, with some developing gastritis only. However, chronic infection with H. pylori without antibiotic treatment predisposes infected individuals to the development of gastric cancer. The aim of this study is to determine active H. pylori infection among patients with symptoms of dyspepsia using three combinations of diagnostic methods. In this report, we studied 1,376 consecutive patients who underwent upper gastrointestinal endoscopy at Universiti Kebangsaan Malaysia Medical Center (UKMMC) for dyspepsia from the period January 1999 to December 2002. The classification of patient’s diagnosis was assessed by endoscopic and histological examination. The H. pylori status was determined by rapid urease test, histological examination or H. pylori culture. Presence of H. pylori infection was confirmed in 30.8% of patients with dyspepsia. H. pylori infection was more prevalent in older patients and in males compared to females. Patients with severe gastroduodenal diseases were more commonly infected with H. pylori. There was a significant difference in H. pylori prevalence among the different ethnic groups. Indians had the highest infection rate (45.4%), followed by Chinese (36.8%) and the lowest were seen in Malays (18.3%). This finding on determination of active H. pylori infection among patients with dyspepsia is consistent with serological studies that showed racial differences in H. pylori prevalence. However, the pattern of H. pylori infection does not reflect the prevalence of severe gastroduodenal diseases among different ethnic groups.
    Matched MeSH terms: Peptic Ulcer
  12. Siow SL, Mahendran HA, Wong CM, Hardin M, Luk TL
    Asian J Surg, 2018 Mar;41(2):136-142.
    PMID: 27955872 DOI: 10.1016/j.asjsur.2016.11.004
    BACKGROUND/OBJECTIVE: The objective of this study was to compare the outcomes of patients who underwent laparoscopic and open repair of perforated peptic ulcers (PPUs) at our institution.

    METHODS: This is a retrospective review of a prospectively collected database of patients who underwent emergency laparoscopic or open repair for PPU between December 2010 and February 2014.

    RESULTS: A total of 131 patients underwent emergency repair for PPU (laparoscopic repair, n=63, 48.1% vs. open repair, n=68, 51.9%). There were no significant differences in baseline characteristics between both groups in terms of age (p=0.434), gender (p=0.305), body mass index (p=0.180), and presence of comorbidities (p=0.214). Both groups were also comparable in their American Society of Anesthesiologists (ASA) scores (p=0.769), Boey scores 0/1 (p=0.311), Mannheim Peritonitis Index > 27 (p=0.528), shock on admission (p<0.99), and the duration of symptoms > 24 hours (p=0.857). There was no significant difference in the operating time between the two groups (p=0.618). Overall, the laparoscopic group had fewer complications compared with the open group (14.3% vs. 36.8%, p=0.005). When reviewing specific complications, only the incidence of surgical site infection was statistically significant (laparoscopic 0.0% vs. open 13.2%, p=0.003). The other parameters were not statistically significant. The laparoscopic group did have a significantly shorter mean postoperative stay (p=0.008) and lower pain scores in the immediate postoperative period (p<0.05). Mortality was similar in both groups (open, 1.6% vs. laparoscopic, 2.9%, p < 0.99).

    CONCLUSION: Laparoscopic repair resulted in reduced wound infection rates, shorter hospitalization, and reduced postoperative pain. Our single institution series and standardized technique demonstrated lower morbidity rates in the laparoscopic group.

    Matched MeSH terms: Peptic Ulcer Perforation
  13. Fazalda A, Quraisiah A, Nur Azlina MF
    PMID: 30105063 DOI: 10.1155/2018/7515692
    Background: Peptic ulcer is a basic term for ulcers on the lower oesophagus, stomach, or jejunum. The specific term for ulcer in the stomach is gastric ulcer. The extensive use of honey around the globe helps researchers to study the usefulness of honey. Many studies had already been conducted and proved the effectiveness of honey in treating gastric ulcer.

    Methods: A systematic review of the literature was conducted to identify relevant studies on honey used as an alternative treatment of gastric ulcer cause by NSAIDs. A comprehensive search was conducted in Medline, SCOPUS, and Ebscohost. The main criteria used were articles published in English and using NSAIDs-induced gastric ulcer in rat's model and those reporting the effectiveness of honey.

    Results: Articles published between 2001 and 2014 were identified to be relevant in studies related to the inclusion criteria. The literature search found 30 potential and closely related articles in this review, but only 5 articles were taken which meet the criteria needed to be fulfilled.

    Conclusions: All studies in this review reported the efficacy of honey for gastric ulcer based on its antioxidant and cytoprotective activities. Most of the studies conducted used different types of honey at various doses on rats. Future studies should be conducted to identify the appropriate dose for humans to achieve similar gastroprotective effects.

    Matched MeSH terms: Peptic Ulcer
  14. Kalyani A, Teoh CM, Sukumar N
    Med J Malaysia, 2005 Jun;60(2):237-8.
    PMID: 16114169
    A patient with duodenal ulcer who developed iatrogenic perforation post endoscopy is presente. We present t is case that was treated successfully treated by jejunal serosal patch.
    Matched MeSH terms: Peptic Ulcer Hemorrhage/diagnosis
  15. Kang JY, Yeoh KG, Ho KY, Guan R, Lim TP, Quak SH, et al.
    J Gastroenterol Hepatol, 1997 Oct;12(9-10):655-9.
    PMID: 9407329
    The aim of this study was to determine, first, whether racial differences exist in the seroprevalence of Helicobacter pylori infection in Singapore, and second, whether these differences correlate with racial differences in peptic ulcer frequency. A commercial serological test for immunoglobulin (Ig)G antibody to H. pylori which was 90% sensitive and 83% specific in our population was used to screen 403 adult blood donors of Chinese, Malay and Indian origin, aged between 15-60 years. Serum specimens from 84 paediatric patients admitted to the Paediatrics Department, National University of Singapore, with non-gastroenterological illnesses were also tested. In all three races, seroprevalence of H. pylori increased with age. Indians have the highest prevalence of infection followed by Chinese and Malays. Peptic ulcer prevalences are known to be highest in Chinese, followed by Indians and Malays. The Malays have the lowest prevalence of H. pylori and peptic ulcer among the three races in Singapore. Indians have a higher prevalence of H. pylori antibodies but a lower frequency of peptic ulcer than the Chinese. Racial differences in peptic ulcer frequency between Chinese and Indians are not explained by the prevalence of H. pylori infection; other environmental or genetic factors may be involved.
    Matched MeSH terms: Peptic Ulcer/epidemiology*
  16. Ooi BP, Hassan MR, Kiew KK, Chin KL, Zalwani Z
    Gastrointest Endosc, 2010 Dec;72(6):1315-6.
    PMID: 20561623 DOI: 10.1016/j.gie.2010.03.1053
    Matched MeSH terms: Peptic Ulcer Hemorrhage/surgery*
  17. Choudhary S, Jain A, Amin MCIM, Mishra V, Agrawal GP, Kesharwani P
    Colloids Surf B Biointerfaces, 2016 May 01;141:268-277.
    PMID: 26859118 DOI: 10.1016/j.colsurfb.2016.01.048
    The study was intended to develop a new intra-gastric floating in situ microballoons system for controlled delivery of rabeprazole sodium and amoxicillin trihydrate for the treatment of peptic ulcer disease. Eudragit S-100 and hydroxypropyl methyl cellulose based low density microballoons systems were fabricated by employing varying concentrations of Eudragit S-100 and hydroxypropyl methyl cellulose, to which varying concentrations of drug was added, and formulated by stirring at various speed and time to optimize the process and formulation variable. The formulation variables like concentration and ratio of polymers significantly affected the in vitro drug release from the prepared floating device. The validation of the gastro-retentive potential of the prepared microballoons was carried out in rabbits by orally administration of microballoons formulation containing radio opaque material. The developed formulations showed improved buoyancy and lower ulcer index as compared to that seen with plain drugs. Ulcer protective efficacies were confirmed in ulcer-bearing mouse model. In conclusion, greater compatibility, higher gastro-retention and higher anti-ulcer activity of the presently fabricated formulations to improve potential of formulation for redefining ulcer treatment are presented here. These learning exposed a targeted and sustained drug delivery potential of prepared microballoons in gastric region for ulcer therapeutic intervention as corroborated by in vitro and in vivo findings and, thus, deserves further attention for improved ulcer treatment.
    Matched MeSH terms: Peptic Ulcer/drug therapy; Peptic Ulcer/metabolism*
  18. Gunaletchumy SP, Seevasant I, Tan MH, Croft LJ, Mitchell HM, Goh KL, et al.
    Sci Rep, 2014 Dec 11;4:7431.
    PMID: 25503415 DOI: 10.1038/srep07431
    Helicobacter pylori infection results in diverse clinical conditions ranging from chronic gastritis and ulceration to gastric adenocarcinoma. Among the multiethnic population of Malaysia, Indians consistently have a higher H. pylori prevalence as compared with Chinese and Malays. Despite the high prevalence of H. pylori, Indians have a relatively low incidence of peptic ulcer disease and gastric cancer. In contrast, gastric cancer and peptic ulcer disease incidence is high in Chinese. H. pylori strains from Chinese strains predominantly belong to the hspEAsia subpopulation while Indian/Malay strains mainly belong to the hspIndia subpopulation. By comparing the genome of 27 Asian strains from different subpopulations, we identified six genes associated with risk of H. pylori-induced peptic ulcer disease and gastric cancer. This study serves as an important foundation for future studies aiming to understand the role of bacterial factors in H. pylori-induced gastro-duodenal diseases.
    Matched MeSH terms: Peptic Ulcer/microbiology*
  19. Tan HJ, Rizal AM, Rosmadi MY, Goh KL
    J Gastroenterol Hepatol, 2005 Apr;20(4):589-94.
    PMID: 15836708
    There is a geographic variation in Helicobacter pylori (HP) genotypes and virulence factors. Cytotoxin associated genes A (cagA) and E (cagE), and certain vacuolating cytotoxin (vacA) genotypes are associated with peptic ulcer disease (PUD). There is also a different prevalence of PUD among different ethnic groups in Malaysia. The present study compared the distribution of vacA alleles and cagA and cagE status in three ethnic groups residing in Kuala Lumpur, Malaysia, and their association with clinical outcome.
    Matched MeSH terms: Peptic Ulcer/microbiology
  20. Lee YY, Noridah N, Syed Hassan SA, Menon J
    PeerJ, 2014;2:e257.
    PMID: 24688841 DOI: 10.7717/peerj.257
    Aim. Helicobacter pylori (H. pylori) infection is exceptionally rare in population from the north-eastern region of Peninsular Malaysia. This provides us an opportunity to contemplate the future without H. pylori in acute non-variceal upper gastrointestinal (GI) bleeding. Methods. All cases in the GI registry with GI bleeding between 2003 and 2006 were reviewed. Cases with confirmed non-variceal aetiology were analysed. Rockall score > 5 was considered high risk for bleeding and primary outcomes studied were in-hospital mortality, recurrent bleeding and need for surgery. Results. The incidence of non-variceal upper GI bleeding was 2.2/100,000 person-years. Peptic ulcer bleeding was the most common aetiology (1.8/100,000 person-years). In-hospital mortality (3.6%), recurrent bleeding (9.6%) and need for surgery (4.0%) were uncommon in this population with a largely low risk score (85.2% with score ≤5). Elderly were at greater risk for bleeding (mean 68.5 years, P = 0.01) especially in the presence of duodenal ulcers (P = 0.04) despite gastric ulcers being more common. NSAIDs, aspirin and co-morbidities were the main risk factors. Conclusions. The absence of H. pylori infection may not reduce the risk of peptic ulcer bleeding in the presence of risk factors especially offending drugs in the elderly.
    Matched MeSH terms: Peptic Ulcer Hemorrhage
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