Elevation of HO-1 Expression Mitigates Intestinal Ischemia-Reperfusion Injury and Restores Tight Junction Function in a Rat Liver Transplantation Model

Aims. This study was aimed at investigating whether elevation of heme oxygenase-1 (HO-1) expression could lead to restoring intestinal tight junction (TJ) function in a rat liver transplantation model. Methods. Intestinal mucosa injury was induced by orthotopic autologous liver transplantation (OALT...

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Veröffentlicht in:Oxidative medicine and cellular longevity 2015-01, Vol.2015 (2015), p.1-12
Hauptverfasser: Hei, Ziqing, Li, Xi, Jin, Yi, Xia, Hua, Yao, Weifeng, Chi, Xinjin, Cai, Jun
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container_issue 2015
container_start_page 1
container_title Oxidative medicine and cellular longevity
container_volume 2015
creator Hei, Ziqing
Li, Xi
Jin, Yi
Xia, Hua
Yao, Weifeng
Chi, Xinjin
Cai, Jun
description Aims. This study was aimed at investigating whether elevation of heme oxygenase-1 (HO-1) expression could lead to restoring intestinal tight junction (TJ) function in a rat liver transplantation model. Methods. Intestinal mucosa injury was induced by orthotopic autologous liver transplantation (OALT) on male Sprague-Dawley rats. Hemin (a potent HO-1 activator) and zinc-protoporphyrin (ZnPP, a HO-1 competitive inhibitor), were separately administered in selected groups before OALT. The serum and intestinal mucosa samples were collected at 8 hours after the operation for analysis. Results. Hemin pretreatment significantly reduced the inflammation and oxidative stress in the mucosal tissue after OALT by elevating HO-1 protein expression, while ZnPP pretreatment aggravated the OALT mucosa injury. Meanwhile, the restriction on the expression of tight junction proteins zonula occludens-1 and occludin was removed after hemin pretreatment. These molecular events led to significant improvement on intestinal barrier function, which was proved to be through increasing nuclear translocation of nuclear factor-E2-related factor 2 (Nrf2) and reducing nuclear translocation of nuclear factor kappa-B (NF-κB) in intestinal injured mucosa. Summary. Our study demonstrated that elevation of HO-1 expression reduced the OALT-induced intestinal mucosa injury and TJ dysfunction. The HO-1 protective function was likely mediated through its effects of anti-inflammation and antioxidative stress.
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This study was aimed at investigating whether elevation of heme oxygenase-1 (HO-1) expression could lead to restoring intestinal tight junction (TJ) function in a rat liver transplantation model. Methods. Intestinal mucosa injury was induced by orthotopic autologous liver transplantation (OALT) on male Sprague-Dawley rats. Hemin (a potent HO-1 activator) and zinc-protoporphyrin (ZnPP, a HO-1 competitive inhibitor), were separately administered in selected groups before OALT. The serum and intestinal mucosa samples were collected at 8 hours after the operation for analysis. Results. Hemin pretreatment significantly reduced the inflammation and oxidative stress in the mucosal tissue after OALT by elevating HO-1 protein expression, while ZnPP pretreatment aggravated the OALT mucosa injury. Meanwhile, the restriction on the expression of tight junction proteins zonula occludens-1 and occludin was removed after hemin pretreatment. These molecular events led to significant improvement on intestinal barrier function, which was proved to be through increasing nuclear translocation of nuclear factor-E2-related factor 2 (Nrf2) and reducing nuclear translocation of nuclear factor kappa-B (NF-κB) in intestinal injured mucosa. Summary. Our study demonstrated that elevation of HO-1 expression reduced the OALT-induced intestinal mucosa injury and TJ dysfunction. The HO-1 protective function was likely mediated through its effects of anti-inflammation and antioxidative stress.</description><identifier>ISSN: 1942-0900</identifier><identifier>EISSN: 1942-0994</identifier><identifier>DOI: 10.1155/2015/986075</identifier><identifier>PMID: 26064429</identifier><language>eng</language><publisher>Cairo, Egypt: Hindawi Publishing Corporation</publisher><subject>Animals ; Apoptosis - drug effects ; Caspase 3 - metabolism ; Disease Models, Animal ; Heme Oxygenase-1 - chemistry ; Heme Oxygenase-1 - genetics ; Heme Oxygenase-1 - metabolism ; Hemin - pharmacology ; Inflammation - prevention &amp; control ; Intestinal Mucosa - drug effects ; Intestinal Mucosa - metabolism ; Intestines ; Liver ; Liver Transplantation - adverse effects ; Male ; Malondialdehyde - metabolism ; Mortality ; NF-E2-Related Factor 2 - metabolism ; Occludin - metabolism ; Oxidases ; Oxidative Stress - drug effects ; Physiological aspects ; Protoporphyrins - pharmacology ; Rats ; Rats, Sprague-Dawley ; Reperfusion Injury - etiology ; Reperfusion Injury - metabolism ; Rodents ; Small intestine ; Studies ; Superoxide Dismutase - metabolism ; Tight Junctions - metabolism ; Transplantation ; Transplants &amp; implants ; Zonula Occludens-1 Protein - metabolism</subject><ispartof>Oxidative medicine and cellular longevity, 2015-01, Vol.2015 (2015), p.1-12</ispartof><rights>Copyright © 2015 Xinjin Chi et al.</rights><rights>COPYRIGHT 2015 John Wiley &amp; Sons, Inc.</rights><rights>Copyright © 2015 Xinjin Chi et al. 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This study was aimed at investigating whether elevation of heme oxygenase-1 (HO-1) expression could lead to restoring intestinal tight junction (TJ) function in a rat liver transplantation model. Methods. Intestinal mucosa injury was induced by orthotopic autologous liver transplantation (OALT) on male Sprague-Dawley rats. Hemin (a potent HO-1 activator) and zinc-protoporphyrin (ZnPP, a HO-1 competitive inhibitor), were separately administered in selected groups before OALT. The serum and intestinal mucosa samples were collected at 8 hours after the operation for analysis. Results. Hemin pretreatment significantly reduced the inflammation and oxidative stress in the mucosal tissue after OALT by elevating HO-1 protein expression, while ZnPP pretreatment aggravated the OALT mucosa injury. Meanwhile, the restriction on the expression of tight junction proteins zonula occludens-1 and occludin was removed after hemin pretreatment. 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This study was aimed at investigating whether elevation of heme oxygenase-1 (HO-1) expression could lead to restoring intestinal tight junction (TJ) function in a rat liver transplantation model. Methods. Intestinal mucosa injury was induced by orthotopic autologous liver transplantation (OALT) on male Sprague-Dawley rats. Hemin (a potent HO-1 activator) and zinc-protoporphyrin (ZnPP, a HO-1 competitive inhibitor), were separately administered in selected groups before OALT. The serum and intestinal mucosa samples were collected at 8 hours after the operation for analysis. Results. Hemin pretreatment significantly reduced the inflammation and oxidative stress in the mucosal tissue after OALT by elevating HO-1 protein expression, while ZnPP pretreatment aggravated the OALT mucosa injury. Meanwhile, the restriction on the expression of tight junction proteins zonula occludens-1 and occludin was removed after hemin pretreatment. These molecular events led to significant improvement on intestinal barrier function, which was proved to be through increasing nuclear translocation of nuclear factor-E2-related factor 2 (Nrf2) and reducing nuclear translocation of nuclear factor kappa-B (NF-κB) in intestinal injured mucosa. Summary. Our study demonstrated that elevation of HO-1 expression reduced the OALT-induced intestinal mucosa injury and TJ dysfunction. The HO-1 protective function was likely mediated through its effects of anti-inflammation and antioxidative stress.</abstract><cop>Cairo, Egypt</cop><pub>Hindawi Publishing Corporation</pub><pmid>26064429</pmid><doi>10.1155/2015/986075</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record>
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subjects Animals
Apoptosis - drug effects
Caspase 3 - metabolism
Disease Models, Animal
Heme Oxygenase-1 - chemistry
Heme Oxygenase-1 - genetics
Heme Oxygenase-1 - metabolism
Hemin - pharmacology
Inflammation - prevention & control
Intestinal Mucosa - drug effects
Intestinal Mucosa - metabolism
Intestines
Liver
Liver Transplantation - adverse effects
Male
Malondialdehyde - metabolism
Mortality
NF-E2-Related Factor 2 - metabolism
Occludin - metabolism
Oxidases
Oxidative Stress - drug effects
Physiological aspects
Protoporphyrins - pharmacology
Rats
Rats, Sprague-Dawley
Reperfusion Injury - etiology
Reperfusion Injury - metabolism
Rodents
Small intestine
Studies
Superoxide Dismutase - metabolism
Tight Junctions - metabolism
Transplantation
Transplants & implants
Zonula Occludens-1 Protein - metabolism
title Elevation of HO-1 Expression Mitigates Intestinal Ischemia-Reperfusion Injury and Restores Tight Junction Function in a Rat Liver Transplantation Model
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