title: Gallic acid prevents nonsteroidal anti-inflammatory drug-induced gastropathy in rat by blocking oxidative stress and apoptosis.
abstract: Nonsteroidal anti-inflammatory drug (NSAID)-induced oxidative stress plays a critical role in gastric mucosal cell apoptosis and gastropathy. NSAIDs induce the generation of hydroxyl radical ((*)OH) through the release of free iron, which plays an important role in developing gastropathy. Thus, molecules having both iron-chelating and antiapoptotic properties will be beneficial in preventing NSAID-induced gastropathy. Gallic acid (GA), a polyphenolic natural product, has the capacity to chelate free iron. Here, we report that GA significantly prevents, as well as heals, NSAID-induced gastropathy. In vivo, GA blocks NSAID-mediated mitochondrial oxidative stress by preventing mitochondrial protein carbonyl formation, lipid peroxidation, and thiol depletion. In vitro, GA scavenges free radicals and blocks (*)OH-mediated oxidative damage. GA also attenuates gastric mucosal cell apoptosis in vivo as well as in vitro in cultured gastric mucosal cells as evident from the TUNEL assay. GA prevents NSAID-induced activation of caspase-9, a marker for the mitochondrial pathway of apoptosis, and restores NSAID-mediated collapse of the mitochondrial transmembrane potential and dehydrogenase activity. Thus, the inhibition of mitochondrial oxidative stress by GA is associated with the inhibition of NSAID-induced mitochondrial dysfunction and activation of apoptosis in gastric mucosal cells, which are responsible for gastric injury or gastropathy.
authors.affiliation: Department of Infectious Diseases and Immunology, Indian Institute of Chemical Biology, Kolkata 700032, West Bengal, India.
authors.forename: Chinmay
authors.initials: C
authors.lastname: Pal
authors.forename: Samik
authors.initials: S
authors.lastname: Bindu
authors.forename: Sumanta
authors.initials: S
authors.lastname: Dey
authors.forename: Athar
authors.initials: A
authors.lastname: Alam
authors.forename: Manish
authors.initials: M
authors.lastname: Goyal
authors.forename: Mohd Shameel
authors.initials: MS
authors.lastname: Iqbal
authors.forename: Pallab
authors.initials: P
authors.lastname: Maity
authors.forename: Susanta S
authors.initials: SS
authors.lastname: Adhikari
authors.forename: Uday
authors.initials: U
authors.lastname: Bandyopadhyay
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage* / Q000009:adverse effects; D017209:Apoptosis / Q000187:drug effects; D053453:Caspase 9 / Q000235:genetics / Q000378:metabolism; D002478:Cells, Cultured; D004789:Enzyme Activation / Q000187:drug effects; D005707:Gallic Acid / Q000008:administration & dosage / Q000494:pharmacology*; D005753:Gastric Mucosa / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D007502:Iron Chelating Agents / Q000008:administration & dosage / Q000494:pharmacology*; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D008928:Mitochondria / Q000187:drug effects* / Q000378:metabolism; D050050:Protein Carbonylation / Q000187:drug effects; D051381:Rats; D017207:Rats, Sprague-Dawley; D013272:Stomach Diseases / Q000139:chemically induced / Q000188:drug therapy* / Q000473:pathology / Q000503:physiopathology
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D007502:Iron Chelating Agents; D005707:Gallic Acid; D053453:Caspase 9