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- W2047811234 abstract "Oxidative stress has been proposed to play a role in the early events of acute pancreatitis, and metallothionein (MT) can provide protection against oxidative stress. Using transgenic mice, we characterized the effects of depletion of MT-I and -II, or overexpression of MT-I, on pancreatic responses during cerulein-induced acute pancreatitis. In MT-I/-II knockout mice, repeated injections of cerulein caused (a) higher serum amylase levels at 3 and 7 h after the initiation of acute pancreatitis; (b) earlier and stronger upregulation of oxidative stress-responsive genes, including heme oxygenase (HO)-l and c-fos; and (c) exacerbated tissue damage (edema and polymorphonuclear neutrophil infiltration) compared with nontransgenic 129/SvCPJ mice. Total pancreatic glutathione (GSH + GSSG) content was similar between the knockout and nontransgenic 129/SvCPJ mice. Interestingly, during acute pancreatitis, CD-1 mice pretreated with L-buthionine-[S,R]-sulfoximine (BSO), which dramatically depleted pancreatic GSH, also had more severe pancreatitis, based on the same three criteria listed above, relative to untreated controls. No effects were observed with BSO treatment alone. Finally, during cerulein-induced acute pancreatitis, MT-I overexpressing transgenic mice (>20-fold increase in pancreatic MT-I content) had lower serum a-amylase levels between 7 and 24 h and delayed upregulation of HO-I mRNA levels, but no difference in c-fos mRNA induction relative to the appropriate strain of nontransgenic mice. Diminished tissue damage (particularly cellular necrosis) was noted in these MT-I overexpressing transgenic mice. Total pancreatic GSH content was similar in these transgenic and nontransgenic mice during cerulein-induced acute pancreatitis. These studies suggest that pancreatic MT can function as an intracellular antioxidant as does GSH and that these intracellular antioxidants play a protective role during cerulein-induced acute pancreatitis." @default.
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- W2047811234 title "Metallothionein Protects Against Cerulein-Induced Acute Pancreatitis" @default.
- W2047811234 doi "https://doi.org/10.1097/00006676-199810000-00003" @default.
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