Identification of proteins involved in the pancreatic exocrine by exogenous ghrelin administration in Sprague-Dawley rats.
The aims of study were to investigate the effects of intraperitoneal (i.p.) infusion of ghrelin on pancreatic α-amylase outputs and the responses of pancreatic proteins to ghrelin that may relate to the pancreatic exocrine. Six male Sprague-Dawley rats (300 g) were randomly divided into two groups, a control group (C, n = 3) and a treatment group (T, 10.0μg/kg BW, n = 3). Blood samples were collected from rat caudal vein once time after one hour injection. The concentrations of plasma ghrelin, cholecystokinin (CCK) and alfa-amylase activity were evaluated by enzyme immunoassay (EIA) kit. Two-dimensional gel electrophoresis (2-DE) analysis was conducted to separate the proteins in pancreas tissue. Results showed that the i.p. infusion of ghrelin at doses of 10.0 μg/kg body weight (BW) increased the plasma ghrelin concentrations (p = 0.07) and elevated the plasma CCK level significantly (p < 0.05). Although there was no statistically significant, the α-amylase activity tended to increase. The proteomics analysis indicated that some pancreatic proteins with various functions were up- or down- regulated compared with control group. In conclusion, ghrelin may have role in the pancreatic exocrine, but the signaling pathway was still not clear. Therefore, much more functional studies focus on these found proteins are needed in the near future.
Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, 120 Neungdong-ro, Seoul, Gwangjin-gu, 143-701 South Korea.
Kyung-Hoon
KH
Lee
Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, 120 Neungdong-ro, Seoul, Gwangjin-gu, 143-701 South Korea.
Tao
T
Wang
Department of Animal Science, College of Animal Science and Veterinary Medicine, Jilin University, Changchun, 130062 P. R. China.
Yong-Cheng
YC
Jin
Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, 120 Neungdong-ro, Seoul, Gwangjin-gu, 143-701 South Korea.
Sang-Bum
SB
Lee
Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, 120 Neungdong-ro, Seoul, Gwangjin-gu, 143-701 South Korea.
Jin-Ju
JJ
Oh
Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, 120 Neungdong-ro, Seoul, Gwangjin-gu, 143-701 South Korea.
Jin-Hee
JH
Hwang
Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, 120 Neungdong-ro, Seoul, Gwangjin-gu, 143-701 South Korea.
Ji-Na
JN
Lim
Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, 120 Neungdong-ro, Seoul, Gwangjin-gu, 143-701 South Korea.
Jae-Sung
JS
Lee
Department of Animal Science and Technology, College of Animal Bioscience & Technology, Konkuk University, 120 Neungdong-ro, Seoul, Gwangjin-gu, 143-701 South Korea.
Hong-Gu
HG
Lee
Alfa-amylase activity; Cholecystokinin; Ghrelin; Pancreatic exocrine; Sprague-Dawley rats; Two-dimensional gel electrophoresis