The Effect of Glycyl-Glutamine Dipeptide Concentration on Enzyme Activity,Cell Proliferation and Apoptosis of Jejunal Tissues from Weaned Piglets

doi:10.1016/S1671-2927(11)60098-9

Journal of Integrative Agriculture ›› 2011, Vol. 10 ›› Issue (7): 1088-1095.DOI: 10.1016/S1671-2927(11)60098-9

The Effect of Glycyl-Glutamine Dipeptide Concentration on Enzyme Activity,Cell Proliferation and Apoptosis of Jejunal Tissues from Weaned Piglets

Institute of Animal Nutrition, Sichuan Agricultural University

收稿日期:2010-07-15 出版日期:2011-07-21 发布日期:2011-08-14
通讯作者: Correspondence JIA Gang, Professor, Ph D, Tel: +86-835-2885005, E-mail: jiagang700510@163.com
作者简介:WANG Hui, MSc, E-mail: fungia@163.com

The Effect of Glycyl-Glutamine Dipeptide Concentration on Enzyme Activity,Cell Proliferation and Apoptosis of Jejunal Tissues from Weaned Piglets

Institute of Animal Nutrition, Sichuan Agricultural University

Received:2010-07-15 Online:2011-07-21 Published:2011-08-14
Contact: Correspondence JIA Gang, Professor, Ph D, Tel: +86-835-2885005, E-mail: jiagang700510@163.com
About author:WANG Hui, MSc, E-mail: fungia@163.com

摘要/Abstract

摘要： An experiment was conducted in a singly factorial design to study the effect of glycyl-glutamine dipeptide on enzymeactivity, cell proliferation and apoptosis of jejunal tissues from weaned piglets at different glycyl-glutamine concentrationlevels of 2, 4, 10, 20, and 30 mmol L-1, respectively. The glutaminase activity, diamine oxidase (DAO) activity, cellpeoliferation, apoptosis, and perotein metabolism were measured by the tissue culture method in vitro using jejunaltissues. The immunohistochemical method was used to study the cell proliferation and apoptosis of jejunal tissues. Theresults showed that compared to the blank control, the percentage and MOD value of BrdU-positicve cells incubated withglycyl-glutamine dipeptide solution were significantly (P<0.05) increased. Accordingly, the percentage and MOD valueof caspase-3-positive cells from tissue incubated with glycyl-glutamine dipeptide were notably lower (P<0.05) than thatfrom the control treatment. The glycyl-glutamine dipeptide increased the glutaminase activity, DAO activity and proteincontent of jejunal tissues, as the dipeptide concentration was on the rise (P<0.05). These results indicated that glycylglutaminedipeptide affected the jejunum development and adaptation of weaned piglets, and the function might befulfilled by enhancing the glutamine-related enzyme activity, thereby increasing the consumption of glutamine, and thenimproving the jejunal cell proliferation and suppressing cell apoptosis. The effects of glycyl-glutamine dipeptide relied ina dose-dependent manner, and the maximum effect was achieved at 20-30 mmol L-1 glycyl-glutamine dipeptide.

关键词:

glycyl-glutamine dipeptide, cell proliferation, apoptosis, diamine oxidase, glutaminase

Abstract: An experiment was conducted in a singly factorial design to study the effect of glycyl-glutamine dipeptide on enzymeactivity, cell proliferation and apoptosis of jejunal tissues from weaned piglets at different glycyl-glutamine concentrationlevels of 2, 4, 10, 20, and 30 mmol L-1, respectively. The glutaminase activity, diamine oxidase (DAO) activity, cellpeoliferation, apoptosis, and perotein metabolism were measured by the tissue culture method in vitro using jejunaltissues. The immunohistochemical method was used to study the cell proliferation and apoptosis of jejunal tissues. Theresults showed that compared to the blank control, the percentage and MOD value of BrdU-positicve cells incubated withglycyl-glutamine dipeptide solution were significantly (P<0.05) increased. Accordingly, the percentage and MOD valueof caspase-3-positive cells from tissue incubated with glycyl-glutamine dipeptide were notably lower (P<0.05) than thatfrom the control treatment. The glycyl-glutamine dipeptide increased the glutaminase activity, DAO activity and proteincontent of jejunal tissues, as the dipeptide concentration was on the rise (P<0.05). These results indicated that glycylglutaminedipeptide affected the jejunum development and adaptation of weaned piglets, and the function might befulfilled by enhancing the glutamine-related enzyme activity, thereby increasing the consumption of glutamine, and thenimproving the jejunal cell proliferation and suppressing cell apoptosis. The effects of glycyl-glutamine dipeptide relied ina dose-dependent manner, and the maximum effect was achieved at 20-30 mmol L-1 glycyl-glutamine dipeptide.

Key words:

glycyl-glutamine dipeptide, cell proliferation, apoptosis, diamine oxidase, glutaminase

WANG Hui, JIA Gang, CHEN Zheng-li, HUANG Lan, WU Cai-mei, WANG Kang-ning. The Effect of Glycyl-Glutamine Dipeptide Concentration on Enzyme Activity,Cell Proliferation and Apoptosis of Jejunal Tissues from Weaned Piglets[J]. Journal of Integrative Agriculture, 2011, 10(7): 1088-1095.

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The Effect of Glycyl-Glutamine Dipeptide Concentration on Enzyme Activity,Cell Proliferation and Apoptosis of Jejunal Tissues from Weaned Piglets

The Effect of Glycyl-Glutamine Dipeptide Concentration on Enzyme Activity,Cell Proliferation and Apoptosis of Jejunal Tissues from Weaned Piglets

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