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stress induced gastritis

Yalda Khosravi, Mun Fai Loke, Khean Lee Goh, Jamuna Vadivelu
Helicobacter pylori is the dominant species of the human gastric microbiota and is present in the stomach of more than half of the human population worldwide. Colonization by H. pylori causes persistent inflammatory response and H. pylori-induced gastritis is the strongest singular risk factor for the development of gastric adenocarcinoma. However, only a small proportion of infected individuals develop malignancy. Besides H. pylori, other microbial species have also been shown to be related to gastritis. We previously reported that interspecies microbial interaction between H...
2016: Frontiers in Microbiology
Mario Rodriguez-Canales, Ruben Jimenez-Rivas, Maria Margarita Canales-Martinez, Ana Judith Garcia-Lopez, Nelly Rivera-Yañez, Oscar Nieto-Yañez, Yadira Ledesma-Soto, Luvia Enid Sanchez-Torres, Miriam Rodriguez-Sosa, Luis Ignacio Terrazas, Marco Aurelio Rodriguez-Monroy
Amphipterygium adstringens is an endemic species in Mexico commonly known as "cuachalalate." Healers to treat gastritis, gastric ulcers, and gastrointestinal cancer have traditionally used the bark. We investigated the effects of alcoholic extract of A. adstringens (AaEE) in DSS-induced colitis in mice. The protective effect of AaEE was determined at 200 mg/kg by oral gavage for 10 days. We determine the effect of AaEE on clinical features (disease activity index), antioxidants, anti-inflammatory, and immunomodulatory activities in relation to the activity of SOD, CAT, and GPx, levels of proinflammatory cytokines, and changes both macroscopic and microscopic of the colonic mucosa...
2016: Mediators of Inflammation
Mahin Khatami
Longevity and accumulation of multiple context-dependent signaling pathways of long-standing inflammation (antigen-load or oxidative stress) are the results of decreased/altered regulation of immunity and loss of control switch mechanisms that we defined as Yin and Yang of acute inflammation or immune surveillance. Chronic inflammation is initiated by immune disruptors-induced progressive changes in physiology and function of susceptible host tissues that lead to increased immune suppression and multistep disease processes including carcinogenesis...
December 2016: Clinical and Translational Medicine
Shuang-Hong Luo, Qin Guo, Guan J Liu, Chaomin Wan
BACKGROUND: Gastrointestinal bleeding refers to loss of blood from any site of the digestive tract. In paediatric clinical practice, it is usually a complaint of children attending the emergency department as a symptom of diseases such as ulcers, gastric or oesophageal varices, gastritis, Mallory-Weiss tears, anorectal fissures, allergic colitis, infectious colitis, intussusception, Henoch-Schonlein purpura, and Meckel's diverticulum; it also occurs with high incidence in critically ill children hospitalised in intensive care units and is caused by stress-induced gastropathy...
2016: Cochrane Database of Systematic Reviews
Thaise Boeing, Luisa Mota da Silva, Lincon Bordignon Somensi, Benhur Judah Cury, Ana Paula Michels Costa, Marcel Petreanu, Rivaldo Niero, Sérgio Faloni de Andrade
ETHNOPHARMACOLOGICAL RELEVANCE: The leaves from Vernonia condensata Baker are broadly used in folk medicine for the treatment of gastric ulcers and dyspepsia. The Brazilian Public Health System (SUS) describes this species as having the potential to serve as a new herbal product with therapeutic benefits. AIM OF THE STUDY: The purpose of the study was to evaluate the gastroprotective activity and gastric healing properties of a crude ethanolic extract from leaves of V...
May 26, 2016: Journal of Ethnopharmacology
Alain P Gobert, Keith T Wilson
Helicobacter pylori is a successful pathogen of the human stomach. Despite a vigorous immune response by the gastric mucosa, the bacterium survives in its ecological niche, thus favoring diseases ranging from chronic gastritis to adenocarcinoma. The current literature demonstrates that high-output of nitric oxide (NO) production by the inducible enzyme NO synthase-2 (NOS2) plays major functions in host defense against bacterial infections. However, pathogens have elaborated several strategies to counteract the deleterious effects of NO; this includes inhibition of host NO synthesis and transcriptional regulation in response to reactive nitrogen species, allowing the bacteria to face the nitrosative stress...
May 2016: Trends in Microbiology
Takamitsu Sasaki, Yuichi Yamashita, Hiroki Kuniyasu
The AKT protein is involved in the phosphatidylinositol-3 kinase signaling pathway and is a vital regulator of survival, proliferation and differentiation in various types of cells. Helicobacter pylori infection induces epithelial cell proliferation and oxidative stress in chronic gastritis. These alterations lead to telomere shortening, resulting in the activation of telomerase. AKT, in particular, is activated by H. pylori-induced inflammation. AKT then promotes the expression of human telomerase reverse transcriptase, which encodes a catalytic subunit of telomerase, and induces telomerase activity, an essential component of the process of carcinogenesis...
August 2015: Oncology Letters
Xiaolin Zhang, Anmin Jiang, Banghua Qi, Zhongyou Ma, Youyi Xiong, Jinfeng Dou, Jianfei Wang
Helicobacter pylori (H. pylori)-induced oxidative stress has been shown to play a very important role in the inflammation of the gastric mucosa and increases the risk of developing gastric cancer. Resveratrol has many biological functions and activities, including antioxidant and anti-inflammatory effect. The purpose of this study was to probe whether resveratrol inhibits H. pylori-induced gastric inflammation and to elucidate the underlying mechanisms of any effect in mice. A mouse model of H. pylori infection was established via oral inoculation with H...
2015: International Journal of Molecular Sciences
Migyeong Jeong, Jong-Min Park, Young-Min Han, Kun Young Park, Don Haeng Lee, Joon-Hwan Yoo, Joo Young Cho, Ki-Baik Hahm
To prove whether dietary intervention can prevent Helicobacter pylori-induced atrophic gastritis and gastric cancer, we developed cancer preventive kimchi (cpKimchi) through special recipe and administered to chronic H. pylori-initiated, high salt diet-promoted, gastric tumorigenesis mice model. H. pylori-infected C57BL/6 mice were administered with cpKimchi mixed in drinking water up to 36 weeks. Gross and pathological gastric lesions were evaluated after 24 and 36 weeks, respectively and explored underlying molecular changes to explain efficacies...
October 6, 2015: Oncotarget
Hanan Ramadan Hamad Mohamed
Titanium dioxide (TiO2) nanoparticles are widely used as a food additive and coloring agent in many consumer products however limited data is available on the nano-TiO2 induced genotoxicity persistence. Thus, this study investigated the persistence of nano-TiO2 induced genotoxicity and possible induction of chronic gastritis in mice. The mice were orally administered 5, 50 or 500 mg/kg body weight nano-TiO2 for five consecutive days, and then mice from each dosage group were sacrificed 24 h or one or two weeks after the last treatment...
September 2015: Food and Chemical Toxicology
Hangyong Zhao, Huanghuang Zhu, Zhou Lin, Gang Lin, Guoqiang Lv
Half of the world's population experiences Helicobacter pylori (H. pylori) infection, which is a main cause of gastritis, duodenal and gastric ulcer, and gastric cancers. In the current study, we investigated the potential role of compound 13 (C13), a novel α1-selective small molecule activator of AMP-activated protein kinase (AMPK), against H. pylori-induced cytotoxicity in cultured gastric epithelial cells (GECs). We found that C13 induced significant AMPK activation, evidenced by phosphorylation of AMPKα1 and ACC (acetyl-CoA carboxylase), in both primary and transformed GECs...
August 7, 2015: Biochemical and Biophysical Research Communications
Jae-Heung Park, Kyung-Jun Jang, Cheol-Hong Kim, Jung-Hee Kim, Young-Kyun Kim, Hyun-Min Yoon
OBJECTIVES: The stomach is a sensitive digestive organ that is susceptible to exogenous pathogens from the diet. In response to such pathogens, the stomach induces oxidative stress, which might be related to the development of both gastric organic disorders such as gastritis, gastric ulcers, and gastric cancer, and functional disorders such as functional dyspepsia. This study was accomplished to investigate the effect of Ganoderma lucidum pharmacopuncture (GLP) on chronic gastric ulcers in rats...
March 2015: Journal of Pharmacopuncture
S Fagoonee, H Li, H Zhang, F Altruda, R Pellicano
The main function of gastric stem cells is to maintain the integrity of the gastrointestinal epithelium and replenish all the mature cell lineages. In order to accomplish this, gastric stem cells proliferate and self-renew, giving rise to transient amplifying cells which replace the constantly renewing epithelium, especially after injury induced by long-term inflammation. Gastric cancer (GC) remains the fourth most common cancer and the second leading cause of death for cancer in the world. The most accepted model of gastric carcinogenesis provides a multifactorial and multistep pathogenesis, involving a number of initiators and other continuator agents...
2014: Panminerva Medica
Pedro A Villablanca, Shashvat Sukhal, Asimul Ansari, Dergham Mohammed
A 50-year-old lady presented with epigastralgia, electrocardiogram (ECG) showed T-wave inversions and the echocardiogram low ejection fraction (EF) with apical ballooning. An esophagogastroduodenoscopy (EGD) revealed gastritis. She recovered with proton pump inhibitors treatment. This is the first case that describes gastritis-induced stress cardiomyopathy. Clinicians should be aware of Takotsubo's cardiomyopathy (TCM) as a possible complication of gastritis.
December 2013: Clinical Case Reports
Eunyoung Byun, Joo Weon Lim, Jung Mogg Kim, Hyeyoung Kim
Hyperproliferation and oncogene expression are observed in the mucosa of Helicobacter pylori- (H. pylori-) infected patients with gastritis or adenocarcinoma. Expression of oncogenes such as β-catenin and c-myc is related to oxidative stress. α-Lipoic acid (α-LA), a naturally occurring thiol compound, acts as an antioxidant and has an anticancer effect. The aim of this study is to investigate the effect of α-LA on H. pylori-induced hyperproliferation and oncogene expression in gastric epithelial AGS cells by determining cell proliferation (viable cell numbers, thymidine incorporation), levels of reactive oxygen species (ROS), NADPH oxidase activation (enzyme activity, subcellular levels of NADPH oxidase subunits), activation of redox-sensitive transcription factors (NF-κB, AP-1), expression of oncogenes (β-catenin, c-myc), and nuclear localization of β-catenin...
2014: Mediators of Inflammation
R Chaturvedi, T de Sablet, M Asim, M B Piazuelo, D P Barry, T G Verriere, J C Sierra, D M Hardbower, A G Delgado, B G Schneider, D A Israel, J Romero-Gallo, T A Nagy, D R Morgan, T Murray-Stewart, L E Bravo, R M Peek, J G Fox, P M Woster, R A Casero, P Correa, K T Wilson
Helicobacter pylori infection causes gastric cancer, the third leading cause of cancer death worldwide. More than half of the world's population is infected, making universal eradication impractical. Clinical trials suggest that antibiotic treatment only reduces gastric cancer risk in patients with non-atrophic gastritis (NAG), and is ineffective once preneoplastic lesions of multifocal atrophic gastritis (MAG) and intestinal metaplasia (IM) have occurred. Therefore, additional strategies for risk stratification and chemoprevention of gastric cancer are needed...
June 2015: Oncogene
Yuan-Chuen Wang
More than 50% of the world population is infected with Helicobacter pylori (H. pylori). The bacterium highly links to peptic ulcer diseases and duodenal ulcer, which was classified as a group I carcinogen in 1994 by the WHO. The pathogenesis of H. pylori is contributed by its virulence factors including urease, flagella, vacuolating cytotoxin A (VacA), cytotoxin-associated gene antigen (Cag A), and others. Of those virulence factors, VacA and CagA play the key roles. Infection with H. pylori vacA-positive strains can lead to vacuolation and apoptosis, whereas infection with cagA-positive strains might result in severe gastric inflammation and gastric cancer...
August 14, 2014: World Journal of Gastroenterology: WJG
Apsara Wijenayake, Amarasooriya Pitawala, Ratnayake Bandara, Charmalie Abayasekara
ETHNOPHARMOCOLOGICAL RELEVANCE: Biotite mica enriched with Fe(2+) ions are widely used as a major mineral ingredient in traditional pharmaceutical science of alchemy (Rasashastra). Abhrak bhasma (mica ash), a pharmaceutical product containing treated mica, is utilized, for example, in Ayurvedic treatments for ailments such as gastritis, renal disease, skin disease and mainly in rejuvenation formulations. However, the untreated mica minerals may be harmful when used directly, as they carry considerably high amounts of trace-elements that can cause undesirable effects in the human body...
September 11, 2014: Journal of Ethnopharmacology
Dong Up Song, Mi Sun Jang, Hyun Woo Kim, Hyun Joong Yoon, Kee Oh Chay, Young Eun Joo, Young Do Jung, Sung Yeul Yang, Bong Whan Ahn
This study was designed to evaluate the efficacy of an orally administered aqueous extract of glutinous rice (GRE) to protect against acute gastric mucosal lesions induced by ethanol, indomethacin, and water immersion restraint stress in rats and to characterize the active substances responsible for the protection. GRE was shown to dose-dependently prevent the gastric lesions induced by the above ulcerogenic treatments at doses of 30 to 300 mg/kg. GRE treatment increased the gastric mucin content and partially blocked the ethanol-induced depletion of the gastric mucus layer...
April 2014: Chonnam Medical Journal
Wulin Tian, Teng Wei, Bin Li, Zhe Wang, Naisheng Zhang, Guanghong Xie
The administration of exogenous β-hydroxybutyrate (β-HB), as well as fasting and caloric restriction, is a condition associated with β-HB abundance and decreased appetite in animals. Increased β-HB and decreased appetite exist simultaneously in some diseases, such as bovine left displaced abomasums (LDA) and human chronic gastritis. However, the effects of β-HB on stomach injuries have not been explored. To elucidate the possible effects of exogenous β-HB on the stomach, mice were injected intraperitoneally with β-HB, and bovine abomasum smooth muscle cells (BSMCs) were treated with different concentrations of β-HB...
2014: PloS One
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