L-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.

<h4>Background and aims</h4>Recent studies have shown that activated pancreatic stellate cells (PSCs) play a major role in pancreatic fibrogenesis. We aimed to study the effect of L-cysteine administration on fibrosis in chronic pancreatitis (CP) induced by trinitrobenzene sulfonic acid...

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Autores principales:	LiJuan Yang, JiaQing Shen, ShanShan He, GuoYong Hu, Jie Shen, Feng Wang, Ling Xu, WeiQi Dai, Jie Xiong, JianBo Ni, ChuanYong Guo, Rong Wan, XingPeng Wang
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/31cdafd668d7411bbc5adaa652881594
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spelling	oai:doaj.org-article:31cdafd668d7411bbc5adaa6528815942021-11-18T07:27:56ZL-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.1932-620310.1371/journal.pone.0031807https://doaj.org/article/31cdafd668d7411bbc5adaa6528815942012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22359633/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background and aims</h4>Recent studies have shown that activated pancreatic stellate cells (PSCs) play a major role in pancreatic fibrogenesis. We aimed to study the effect of L-cysteine administration on fibrosis in chronic pancreatitis (CP) induced by trinitrobenzene sulfonic acid (TNBS) in rats and on the function of cultured PSCs.<h4>Methods</h4>CP was induced by TNBS infusion into rat pancreatic ducts. L-cysteine was administrated for the duration of the experiment. Histological analysis and the contents of hydroxyproline were used to evaluate pancreatic damage and fibrosis. Immunohistochemical analysis of α-SMA in the pancreas was performed to detect the activation of PSCs in vivo. The collagen deposition related proteins and cytokines were determined by western blot analysis. DNA synthesis of cultured PSCs was evaluated by BrdU incorporation. We also evaluated the effect of L-cysteine on the cell cycle and cell activation by flow cytometry and immunocytochemistry. The expression of PDGFRβ, TGFβRII, collagen 1α1 and α-SMA of PSCs treated with different concentrations of L-cysteine was determined by western blot. Parameters of oxidant stress were evaluated in vitro and in vivo. Nrf2, NQO1, HO-1, IL-1β expression were evaluated in pancreas tissues by qRT-PCR.<h4>Results</h4>The inhibition of pancreatic fibrosis by L-cysteine was confirmed by histological observation and hydroxyproline assay. α-SMA, TIMP1, IL-1β and TGF-β1 production decreased compared with the untreated group along with an increase in MMP2 production. L-cysteine suppressed the proliferation and extracellular matrix production of PSCs through down-regulating of PDGFRβ and TGFβRII. Concentrations of MDA+4-HNE were decreased by L-cysteine administration along with an increase in GSH levels both in tissues and cells. In addition, L-cysteine increased the mRNA expression of Nrf2, NQO1 and HO-1 and reduced the expression of IL-1β in L-cysteine treated group when compared with control group.<h4>Conclusion</h4>L-cysteine treatment attenuated pancreatic fibrosis in chronic pancreatitis in rats.LiJuan YangJiaQing ShenShanShan HeGuoYong HuJie ShenFeng WangLing XuWeiQi DaiJie XiongJianBo NiChuanYong GuoRong WanXingPeng WangPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 2, p e31807 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q LiJuan Yang JiaQing Shen ShanShan He GuoYong Hu Jie Shen Feng Wang Ling Xu WeiQi Dai Jie Xiong JianBo Ni ChuanYong Guo Rong Wan XingPeng Wang L-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.
description	<h4>Background and aims</h4>Recent studies have shown that activated pancreatic stellate cells (PSCs) play a major role in pancreatic fibrogenesis. We aimed to study the effect of L-cysteine administration on fibrosis in chronic pancreatitis (CP) induced by trinitrobenzene sulfonic acid (TNBS) in rats and on the function of cultured PSCs.<h4>Methods</h4>CP was induced by TNBS infusion into rat pancreatic ducts. L-cysteine was administrated for the duration of the experiment. Histological analysis and the contents of hydroxyproline were used to evaluate pancreatic damage and fibrosis. Immunohistochemical analysis of α-SMA in the pancreas was performed to detect the activation of PSCs in vivo. The collagen deposition related proteins and cytokines were determined by western blot analysis. DNA synthesis of cultured PSCs was evaluated by BrdU incorporation. We also evaluated the effect of L-cysteine on the cell cycle and cell activation by flow cytometry and immunocytochemistry. The expression of PDGFRβ, TGFβRII, collagen 1α1 and α-SMA of PSCs treated with different concentrations of L-cysteine was determined by western blot. Parameters of oxidant stress were evaluated in vitro and in vivo. Nrf2, NQO1, HO-1, IL-1β expression were evaluated in pancreas tissues by qRT-PCR.<h4>Results</h4>The inhibition of pancreatic fibrosis by L-cysteine was confirmed by histological observation and hydroxyproline assay. α-SMA, TIMP1, IL-1β and TGF-β1 production decreased compared with the untreated group along with an increase in MMP2 production. L-cysteine suppressed the proliferation and extracellular matrix production of PSCs through down-regulating of PDGFRβ and TGFβRII. Concentrations of MDA+4-HNE were decreased by L-cysteine administration along with an increase in GSH levels both in tissues and cells. In addition, L-cysteine increased the mRNA expression of Nrf2, NQO1 and HO-1 and reduced the expression of IL-1β in L-cysteine treated group when compared with control group.<h4>Conclusion</h4>L-cysteine treatment attenuated pancreatic fibrosis in chronic pancreatitis in rats.
format	article
author	LiJuan Yang JiaQing Shen ShanShan He GuoYong Hu Jie Shen Feng Wang Ling Xu WeiQi Dai Jie Xiong JianBo Ni ChuanYong Guo Rong Wan XingPeng Wang
author_facet	LiJuan Yang JiaQing Shen ShanShan He GuoYong Hu Jie Shen Feng Wang Ling Xu WeiQi Dai Jie Xiong JianBo Ni ChuanYong Guo Rong Wan XingPeng Wang
author_sort	LiJuan Yang
title	L-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.
title_short	L-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.
title_full	L-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.
title_fullStr	L-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.
title_full_unstemmed	L-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.
title_sort	l-cysteine administration attenuates pancreatic fibrosis induced by tnbs in rats by inhibiting the activation of pancreatic stellate cell.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/31cdafd668d7411bbc5adaa652881594
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L-cysteine administration attenuates pancreatic fibrosis induced by TNBS in rats by inhibiting the activation of pancreatic stellate cell.

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