We investigated effect of hydrogen sulfide (H(2)S) on oxidative stress-caused cell death in gastric mucosal epithelial cells. In rat normal gastric epithelial RGM1 cells, NaHS, a H(2)S donor, at 1.5mM strongly suppressed hydrogen peroxide (H(2)O(2))-caused cell death, while it slightly augmented the H(2)O(2) toxicity at 0.5-1mM. The protective effect of NaHS was abolished by inhibitors of MEK or JNK, but not of p38 MAP kinase. NaHS at 1.5mM actually phosphorylated ERK and JNK in RGM1 cells. Glibenclamide, an ATP-sensitive K(+) (K(ATP)(+)) channel inhibitor, did not affect the protective effect of NaHS, although mRNAs for K(ATP)(+) channel subunits, Kir6.1 and SUR1, were detected in RGM1 cells. In anesthetized rats, oral administration of NaHS protected against gastric mucosal lesion caused by ischemia-reperfusion. These results suggest that NaHS/H(2)S may protect gastric mucosal epithelial cells against oxidative stress through stimulation of MAP kinase pathways, a therapeutic dose range being very narrow.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.tox.2007.07.020 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Hyperbaric oxygen therapy in the treatment of severe gastric laceration with active bleeding: A case report.
World J Gastrointest Endosc
January 2025
Department of Gastroenterology, Shenzhen People's Hospital (Jinan University of Second Clinical Medical Sciences), Shenzhen 518020, Guangdong Province, China.
Background: Endoscopic therapy is the primary approach for treating Mallory-Weiss syndrome, particularly under conditions of mucosal protection and gastric acid suppression. However, for a subset of patients who cannot undergo endoscopic intervention or for whom such treatment proves ineffective, alternative measures like arterial embolization or surgical intervention may be required. While hyperbaric oxygen therapy (HBOT) has been applied across a range of medical conditions, its application in managing hemorrhage due to gastric tears remains undocumented.
View Article and Find Full Text PDFGastroprotective effect of fucoidan from Sargassum siliquastrum against ethanol-induced gastric mucosal injury.
Food Res Int
February 2025
SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National & Local Joint Engineering Laboratory for Marine Bioactive Polysaccharide Development and Application, Dalian Polytechnic University, Dalian 116034, PR China. Electronic address:
The ethanol-induced BALB/c mice and human gastric epithelial cell (Ges-1 cell) models were used to investigate the Sargassum siliquastrum fucoidan (SFuc) gastroprotective capability. The injury score and histopathological sections of the stomach were used to evaluate the gastroprotective capability. The western blotting and RT-PCR methods determined the signaling mechanism of mice's gastric injury.
View Article and Find Full Text PDFDevelopment of Digestive Tract in Larval and Juvenile Red Spotted Grouper, .
Dev Reprod
December 2024
Kidang Marine Science Institute, Jeju National University, Jeju 63333, Korea.
This study investigated the progressive morphological alterations and digestive tract development in larval and juvenile red spotted grouper, across growth stages. External shape observations were made using an optical microscope, and the development of the digestive tract was investigated using histological methods. At 1 day after hatching (DAH), the digestive tract appeared as a straight tube extending between the ventral side and yolk-sac.
View Article and Find Full Text PDFLentinan's effect on gut microbiota and inflammatory cytokines in 5-FU-induced mucositis mice.
AMB Express
January 2025
Department of Biotechnology, College of Basic Medical Science, Dalian Medical University, Dalian, 116044, China.
Chemotherapeutic therapies for cancer are frequently associated with cytotoxic side effects that can be harmful to human health, including the development of intestinal mucositis (IM). It mostly affects the gastrointestinal tract, causing ulceration, inflammation, and the formation of lesions in the colon. Surprisingly, despite the frequency of IM, therapeutic choices remain restricted.
View Article and Find Full Text PDFBreast milk delivery of an engineered dimeric IgA protects neonates against rotavirus.
Mucosal Immunol
January 2025
Weill Cornell Medicine Department of Pediatrics, Division of Infectious Disease, New York, NY, USA. Electronic address:
Dimeric IgA (dIgA) is the dominant antibody in many mucosal tissues. It is actively transported onto mucosal surfaces as secretory IgA (sIgA) which plays an integral role in protection against enteric pathogens, particularly in young children. Therapeutic strategies that deliver engineered, potently neutralizing antibodies directly into the infant intestine through breast milk could provide enhanced antimicrobial protection for neonates.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!