| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Research Abstract |
Pancreatitis was induced by intraperitoneal injection of L-arginine (500mg/100g body weight) in male Wistar rats weighing 150-160g. Rats were sacrificed at 24,36,48,60h, and 3,5, and 7 days after the injection. Total RNA was extracted from the pancreas using acid-guanidium thiocyanate-phenol-chloroform method. Expressions of extracellular collagen matrix messenger RNA (mRNA) were determined by Northern transfer analysis and that of TGF-beta mRNA was examined by reverse transcriptase polymelase chain reaction (RT-PCR). TGF-beta mRNA expression was reached the peak value at 48h, thereafter, it gradually decreased, but remained elevated until 7 days. Fibronectin mRNA expression was detectable at 24 h after the arginine injection, reaching the peak value at 48 h. Type-I collagen mRNA expression was increased at 48 h and peaked on day 5. An increase of type-III collagen mRNA expression was detected at 48 h, reaching the peak value at 72 h. Furthermore, an expression of type-IV collagen mRNA was delayd ; detectable at 60 h and peaked at 5 day, but lasted until 7 days. Since TGF-beta appeared at the earliest stage of pancreatitis, it is likely that TGF-beta is related to the production of extracellular matrix. TGF-beta and some extracellular matrix might be involved in the fibrosis of pancreatitis.
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