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DURHAN A, KOŞMAZ K, ŞENLİKCİ A, ERGÜDER E, SÜLEYMAN M, DUYMUŞ ME, BAĞ YM, PEKCİCİ MR, ŞENEŞ M, ALKAN KUŞABBİ İ, ESER EP, HÜCÜMENOĞLU S. Does red ginseng ameliorate liver damage caused by obstructive jaundice? : an experimental study. JOURNAL OF HEALTH SCIENCES AND MEDICINE 2021. [DOI: 10.32322/jhsm.900023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Zhou YX, Ni Y, Liu YB, Liu X. Histone preconditioning protects against obstructive jaundice-induced liver injury in rats. Exp Ther Med 2014; 8:15-20. [PMID: 24944590 PMCID: PMC4061184 DOI: 10.3892/etm.2014.1697] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 03/25/2014] [Indexed: 12/26/2022] Open
Abstract
A major consequence of obstructive jaundice (OJ) in clinical practice is the development of severe liver injury, and at present, no effective treatments have been developed to protect against it. Preconditioning with damage-associated molecular pattern (DAMP) molecules has been demonstrated to protect multiple organs from injury, and histones have been recently identified as DAMP molecules. The aim of the present study was to investigate the protective effect of histone preconditioning against OJ-induced liver injury in rats and the involvement of Toll-like receptors. Rats were administered histone proteins (200 μg/kg; 1 ml) or physiological saline (1 ml) intraperitoneally 24 h prior to being subjected to bile duct ligation (BDL). The serum levels of liver enzymes and bilirubin, as well as the histopathology were analyzed. The mRNA expression of interleukin-6 (IL-6) in the liver tissue was analyzed using quantitative polymerase chain reaction. BDL in the control group caused severe OJ-induced liver injury, as indicated by the significantly elevated levels of liver enzymes and mRNA levels of IL-6, and confirmed by histopathological alterations. However, histone preconditioning significantly ameliorated the OJ-induced liver injury caused by BDL, as shown by an improvement in the levels of liver enzymes, a suppression of IL-6 production, as well as histopathological alterations. Therefore, these results suggested that histone preconditioning is able to protect against OJ-induced liver injury in rats.
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Affiliation(s)
- You-Xing Zhou
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518035, P.R. China
| | - Yong Ni
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518035, P.R. China
| | - Yi-Bing Liu
- Department of Hepatobiliary Surgery, Longgang District Central Hospital of Shenzhen, Shenzhen, Guangdong 518116, P.R. China
| | - Xiaohong Liu
- Department of Geriatric Psychiatry, Wuxi Mental Health Center, Wuxi, Jiangsu 214151, P.R. China
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Wang JB, Liu C, Yeh YC, Liu CP, Chang CJ, Chen CY, Chin T. A novel rat model simulating biliary atresia after a Kasai operation. J INVEST SURG 2014; 27:183-90. [PMID: 24476001 DOI: 10.3109/08941939.2013.856969] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
PURPOSE The mechanisms of liver fibrosis in biliary atresia (BA) after a Kasai operation deserve studying to improve the clinical outcomes. This study aimed to create a rat model simulating BA after a Kasai operation. METHODS We inserted a polyethylene tube (PE10) into the common hepatic duct (CHD) and ligated the common bile duct (CBD) in 30 newborn rats and injected 95% ethanol into IHD at postoperative week-one (POW-1). The PE10 was removed at POW-3. The rats were sacrificed at POW-5. The CBD cystojejunostomy was performed on another 10 rats at POW-5. RESULTS The IHD obliteration and CBD dilatation were noted at POW-3 cholangiography before removal of the PE tube. The gross findings at sacrifice in the rats without cystojejunostomy included biliary fibrosis, CBD cyst, and IHD obliteration. The microscopic findings of the liver were like BA. Seven of the 10 rats with CBD cystojejunostomy were jaundice-free at POW-8. The fibrosis grade at POW-8 of the rats with CBD cystojejunostomy was significantly lower in the jaundice-free rats (Ishak fibrosis score, 3.4 ± 0.9 and 1.5 ± 0.3 in the jaundiced rats and jaundice-free rats, respectively, p < .05). CONCLUSION Based on our study, CBD cystojejunostomy five weeks after CBD ligation with ethanol injection into the IHD in newborn rats can provide a model for investigating mechanisms and treatments of liver fibrosis in BA after a Kasai operation.
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Affiliation(s)
- Jen-Bin Wang
- 1Division of Pediatric Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University, School of Medicine , Taipei , Taiwan
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Chou MH, Chuang JH, Eng HL, Tsai PC, Hsieh CS, Liu HC, Wang CH, Lin CY, Lin TM. Effects of hepatocyte CD14 upregulation during cholestasis on endotoxin sensitivity. PLoS One 2012; 7:e34903. [PMID: 22511970 PMCID: PMC3325271 DOI: 10.1371/journal.pone.0034903] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Accepted: 03/07/2012] [Indexed: 02/07/2023] Open
Abstract
Cholestasis is frequently related to endotoxemia and inflammatory response. Our previous investigation revealed a significant increase in plasma endotoxin and CD14 levels during biliary atresia. We therefore propose that lipopolysacharides (LPS) may stimulate CD14 production in liver cells and promote the removal of endotoxins. The aims of this study are to test the hypothesis that CD14 is upregulated by LPS and investigate the pathophysiological role of CD14 production during cholestasis. Using Western blotting, qRT-PCR, and promoter activity assay, we demonstrated that LPS was associated with a significant increase in CD14 and MD2 protein and mRNA expression and CD14 promoter activity in C9 rat hepatocytes but not in the HSC-T6 hepatic stellate cell line in vitro. To correlate CD14 expression and endotoxin sensitivity, in vivo biliary LPS administration was performed on rats two weeks after they were subjected to bile duct ligation (BDL) or a sham operation. CD14 expression and endotoxin levels were found to significantly increase after LPS administration in BDL rats. These returned to basal levels after 24 h. In contrast, although endotoxin levels were increased in sham-operated rats given LPS, no increase in CD14 expression was observed. However, mortality within 24 h was more frequent in the BDL animals than in the sham-operated group. In conclusion, cholestasis and LPS stimulation were here found to upregulate hepatic CD14 expression, which may have led to increased endotoxin sensitivity and host proinflammatory reactions, causing organ failure and death in BDL rats.
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Affiliation(s)
- Ming-Huei Chou
- Institute of Basic Medical Sciences, National Chang Kung University, Tainan, Taiwan
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Kaohsiung, Taiwan
| | - Jiin-Haur Chuang
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Kaohsiung, Taiwan
- Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
- * E-mail: (J-HC); (T-ML)
| | - Hock-Liew Eng
- Department of Pathology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Po-Chin Tsai
- Department of Pathology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chih-Sung Hsieh
- Department of Medical Research, PingTung Christian Hospital, PingTung, Taiwan
| | - Hsiang-Chun Liu
- Institute of Basic Medical Sciences, National Chang Kung University, Tainan, Taiwan
| | - Chiou-Huey Wang
- Departmentof Laboratory Medicine, E-DA Hospital/I-SHOU University, Kaohsiung, Taiwan
| | - Chih-Yun Lin
- Division of Hepato-gastroenterology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Tsun-Mei Lin
- Institute of Basic Medical Sciences, National Chang Kung University, Tainan, Taiwan
- Departmentof Laboratory Medicine, E-DA Hospital/I-SHOU University, Kaohsiung, Taiwan
- Department of Medical Research, E-DA Hospital/I-SHOU University, Kaohsiung, Taiwan
- * E-mail: (J-HC); (T-ML)
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Watanabe K, Yokoyama Y, Kokuryo T, Kawai K, Kitagawa T, Seki T, Nakagawa A, Nagino M. 15-deoxy-delta 12,14-prostaglandin J2 prevents inflammatory response and endothelial cell damage in rats with acute obstructive cholangitis. Am J Physiol Gastrointest Liver Physiol 2010; 298:G410-8. [PMID: 20056897 DOI: 10.1152/ajpgi.00233.2009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Acute obstructive cholangitis is a common disease with a high mortality rate. Ligands for peroxisome proliferator-activated receptor-gamma (PPARgamma), such as 15-deoxy-Delta(12,14)-prostaglandin J(2) (15D-PGJ(2)), have been proposed as a new class of anti-inflammatory compounds. This study investigated the effect of 15D-PGJ(2) treatment on lipopolysaccharide (LPS)-induced acute obstructive cholangitis. The rats were randomly assigned to five groups: sham operation (Sham; simple laparotomy), sham operation with intraperitoneal saline infusion (Sham+Saline), sham operation with intraperitoneal LPS infusion (Sham+LPS), bile duct ligation (BDL) with saline infusion into the bile duct (BDL+Saline), and BDL with LPS infusion into the bile duct (BDL+LPS). Biochemical assays of blood samples, histology of the liver, portal venous pressure, hyaluronic acid clearance, and expression of inflammation-associated genes in the liver were evaluated. Furthermore, the Sham+LPS and the BDL+LPS group were divided into two groups (with and without 15D-PGJ(2) treatment), and their survival rates were compared. Biochemical assays of blood samples, portal venous pressure, hyaluronic acid clearance, and expression of inflammation-associated genes in the liver were all significantly higher in the BDL+LPS group compared with those in the BDL+Saline group, indicating the presence of increased liver damage in the first group. However, preoperative administration of 15D-PGJ(2) significantly improved these outcomes. Furthermore, the survival rate after establishment of cholangitis was significantly improved by the administration of 15D-PGJ(2) in the BDL+LPS group. These results clearly demonstrate that 15D-PGJ(2) inhibits the inflammatory response and endothelial cell damage seen in acute obstructive cholangitis and could contribute to improve the outcome of this pathology.
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Affiliation(s)
- Katsutaka Watanabe
- Dept. of Surgery, Nagoya Univ. Graduate School of Medicine, Showa-ku, Japan
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Zhang M, Wang XQ, Zhou YK, Ma YL, Shen TY, Chen HQ, Chu ZX, Qin HL. Effects of oral Lactobacillus plantarum on hepatocyte tight junction structure and function in rats with obstructive jaundice. Mol Biol Rep 2009; 37:2989-99. [PMID: 19816788 DOI: 10.1007/s11033-009-9866-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Accepted: 09/29/2009] [Indexed: 01/16/2023]
Abstract
Surgery and infection are prominent risk factors for the development of obstructive cholestasis which in turn is associated with failure of the liver barrier. We studied the effects of oral Lactobacillus plantarum (LP) supplementation on endotoxemia, oxidative stress, apoptosis, and tight junctions of hepatocytes in an experimental model of obstructive jaundice. Fifty male Wistar rats were randomly divided into five groups of 10 each: group I, sham-operated; group II, ligation and division of the common bile duct (BDL); group III, BLD followed by oral LP treatment; group IV, BDL followed by internal biliary drainage (IBD); group V, BDL followed by IBD and oral LP treatment. Hepatocyte apoptosis, plasma reduced glutathione (GSH) and oxidized glutathione (GSSG) levels, and portal blood endotoxin levels were measured and changes in tight junction-associated proteins occludin, claudin-1, claudin-4, and ZO-1 were observed. Compared to the sham-operated group I, significant increases in endotoxemia, apoptosis, and GSSG were observed in group II and significant decreases were observed in group V. Tight junctions were destroyed in group II animals but were not in animals treated with oral LP (groups III and V). An increase in occludin, claudin-1, claudin-4, and ZO-1 mRNA and protein levels were detected in livers in LP-treated animals (group V) compared with group II levels. Oral LP treatment of rats with obstructive jaundice assisted in the return of active hepatic barrier function. These results may lead to treatments to prevent the deleterious effects of obstructive jaundice.
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Affiliation(s)
- Ming Zhang
- Department of Surgery, The Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, 200233 Shanghai, China
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Kilicoglu B, Gencay C, Kismet K, Serin Kilicoglu S, Erguder I, Erel S, Sunay AE, Erdemli E, Durak I, Akkus MA. The ultrastructural research of liver in experimental obstructive jaundice and effect of honey. Am J Surg 2008; 195:249-56. [PMID: 18083132 DOI: 10.1016/j.amjsurg.2007.04.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2007] [Revised: 04/10/2007] [Accepted: 04/10/2007] [Indexed: 01/08/2023]
Abstract
BACKGROUND To examine the effects of honey on oxidative stress and apoptosis in experimental obstructive jaundice model. METHOD Thirty rats were divided into 3 groups: group I, sham-operated; group II, ligation and division of the common bile duct (BDL); group III, BDL followed by oral supplementation of honey 10 g/kg/d. Liver samples were examined under light microscope and transmission electron microscope. Hepatocyte apoptosis was quantitated using the terminal deoxy-nucleotidyl transferase-mediated deoxyuridine triphosphate nick-end labeling (TUNEL) assay. Plasma and blood malondialdehyde (MDA) and glutation activities were measured for determining the oxidative stress. RESULTS The liver levels of MDA and GSH were significantly different between the honey and BDL groups (P = .006 and .001, respectively). However, there was no significant difference between the plasma MDA and GSH levels of these groups (P > .05). In group III, significant reductions in the size of enlarged hepatocytes and the edema were demonstrated. The dilatation of the bile canaliculi dramatically turned to original dimention. By TUNEL assay, it was shown that administration of honey decreased the number of apoptotic cells. CONCLUSIONS In the present study, we found that honey diminished the negative effects of BDL on the hepatic ultrastructure. We conclude that this effect might be due to its antioxidant and anti-inflammatory activities.
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Affiliation(s)
- Bulent Kilicoglu
- Ankara Training and Research Hospital, 4th General Surgery Department, Ankara, Turkey
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Lee CW, Chuang JH, Wang PW, Chang NK, Wang HC, Huang CC, Tiao MM, Lo SK. Effect of Glucocorticoid Pretreatment on Oxidative Liver Injury and Survival in Jaundiced Rats with Endotoxin Cholangitis. World J Surg 2006; 30:2217-26. [PMID: 17102917 DOI: 10.1007/s00268-006-0143-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Biliary tract infection is associated with high mortality. This study investigated the effect of glucocorticoid pretreatment on lipopolysaccharide (LPS)-induced cholangitis. METHODS Rats undergoing either sham operation or ligation of the extrahepatic bile duct (BDL) for 2 weeks were randomly assigned to receive intravenous injections of dexamethasone (DX) or normal saline (NS) prior to infusing LPS into the biliary tract. The plasma levels of tumor necrosis factor-alpha (TNFalpha), chemokines monocyte chemoattractant protein-1 (MCP-1) and macrophage inflammatory protein-2 (MIP-2) as well as liver mRNA expression of MCP-1 and MIP-2 were determined. Infiltration of monocytes, Kupffer cells, and neutrophils in rat liver were studied with immunohistochemistry. Oxidative liver injury was measured by the malondialdehyde (MDA) content. RESULTS Dexamethasone pretreatment resulted in significantly decreased plasma levels of TNFalpha at 1 hour, MCP-1 and MIP-2 at 2 and 3 hours, and decreased liver MCP-1 mRNA expression at 3 hours following LPS infusion in BDL-DX rats than in BDL-NS rats. The number of inflammatory cells in the liver was significantly different between sham- and BDL-treated rats but was not affected by DX pretreatment. Pretreatment with DX resulted in significantly decreased liver MDA contents in the BDL-DX group than that in the BDL-NS group. Jaundiced rats pretreated with 5 mg DX prior to infusion of 1 g of LPS were 6.8 times more likely to survive than those that were not pretreated. CONCLUSIONS Pretreatment of jaundiced, LPS-treated rats with a supraphysiological dose of dexamethasone may rescue their lives by suppression of chemokine expression and alleviation of oxidative liver injury.
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Affiliation(s)
- Chi Wei Lee
- Department of Emergency Medicine, E-Da Hospital, I-Shou University, 1 E-Da Road, Jiau-shu Tsuen, Yan-chau Shiang, 824, Kaohsiung, Taiwan
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Hsieh CS, Wang PW, Lee SY, Huang CC, Chang NK, Chen CM, Wu CL, Wang HC, Chuang JH. Glucocorticoid pretreatment suppresses chemokine expression and inflammatory cell infiltration in cholestatic rats receiving biliary intervention. J Pediatr Surg 2006; 41:1669-75. [PMID: 17011266 DOI: 10.1016/j.jpedsurg.2006.05.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
AIM Biliary intervention may augment chemokine expression and inflammatory cell infiltration and aggravates liver injury in cholestatic rats. We tested the efficacy of glucocorticoid pretreatment to prevent the complications. METHODS A model of biliary intervention was established in rats without (sham) or with bile duct ligation (BDL). Before biliary intervention, rats were randomly assigned to receiving intravenous injection of dexamethasone (DX group) or normal saline (NS group). Plasma levels of monocyte chemoattractant protein-1 (MCP-1) and macrophage inflammatory protein-2 (MIP-2) were measured with enzyme-linked immunosorbent assay, and liver messenger RNA of these chemokines was quantified with real-time quantitative reverse transcriptase-polymerase chain reaction. Monocytes, Kupffer cells, and neutrophils in the rat liver were characterized with antibodies to ectodermal dysplasia 1 (ED1), ED2, and myeloperoxidase, respectively. RESULTS By 3 hours after biliary intervention, plasma MCP-1 and MIP-2 proteins in BDL-NS rats were significantly higher than in BDL-DX. At 3 hours, liver MCP-1 and MIP-2 messenger RNA levels were significantly upregulated in BDL-NS than in BDL-DX. The amount of ED1-, ED2- and myeloperoxidase-staining cells were significantly greater in BDL-NS than in BDL-DX. Most of the changes returned to baseline levels by 24 hours. CONCLUSION Glucocorticoid pretreatment suppresses chemokine expression and inflammatory cell infiltration, which may consequently alleviate liver injury in cholestatic rats receiving biliary intervention.
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Affiliation(s)
- Chih-Sung Hsieh
- Department of Surgery, Chang Gung Memorial Hospital, Chang Gung University, Kaohsiung 833, Taiwan
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Baier PK, Baumgartner U, Hempel S, Wolff-Vorbeck G, von Dobschuetz E, Hopt UT. Kupffer cells infiltrate liver tissue early after ischemia-reperfusion and partial hepatectomy. Eur Surg Res 2006; 37:290-7. [PMID: 16374011 DOI: 10.1159/000089239] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2005] [Accepted: 08/29/2005] [Indexed: 11/19/2022]
Abstract
Kupffer cells, ED2+macrophages of the liver, play an important role in liver damage and regeneration. It is proposed that Kupffer cells are stationary and regenerate after acute liver trauma by local proliferation. We analyzed their kinetics in three surgically relevant murine models of acute liver injury: partial liver resection, ischemia with reperfusion and sepsis. We found an early increase in ED2+cells after 0.5 h and a maximum after 12 h. These results suggest an infiltration of the cells early after the injury and a later local proliferation. These ED2+macrophages are localized predominantly periportally; nearly no macrophages are found pericentrally, except in the sepsis model. Therefore, a shifting of macrophages from portal to central seems to be unlikely, suggesting a hepatic zonation of homing factors.
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Affiliation(s)
- P K Baier
- Department of Surgery, University of Freiburg, Freiburg, Germany.
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Harty MW, Huddleston HM, Papa EF, Puthawala T, Tracy AP, Ramm GA, Gehring S, Gregory SH, Tracy TF. Repair after cholestatic liver injury correlates with neutrophil infiltration and matrix metalloproteinase 8 activity. Surgery 2005; 138:313-20. [PMID: 16153442 DOI: 10.1016/j.surg.2005.04.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2005] [Revised: 04/08/2005] [Accepted: 04/12/2005] [Indexed: 02/05/2023]
Abstract
BACKGROUND Although timely surgical treatment of liver disease can interrupt inflammation and reduce fibrosis, the mechanisms of repair are unknown. We questioned whether these mechanisms of repair include changes in the inflammatory infiltrate and associated biological activity of matrix metalloproteinases (MMPs) 8 and 2. METHODS Rats (n >or= 3) underwent biliary ductal suspension for 7 days followed by decompression. Livers were collected after 7 days of obstruction (d0) and after 2, 5, and 7 days of repair (d2, d5, d7, respectively), and assessed morphometrically for collagen, polymorphonuclear cells (PMNs), Kupffer cells (KCs), and inflammatory mononuclear phagocytes (MNPs). In situ zymography was performed by using fluorogenic substrates for MMP-8 and MMP-2 to spatially localize enzymatic activity. RESULTS Cholestatic injury resulted in significantly elevated (P <or= .001) collagen deposition (3-fold), and elevated numbers of MNPs (10-fold), KCs (5-fold), and PMNs (4-fold), compared with shams. PMNs remained elevated through d7, while collagen deposition, KCs, and MNPs returned to sham levels by d2. In situ zymography showed no significant changes in MMP-2 activity after cholestatic injury and repair. MMP-8 activity was significantly (P <or= .05) elevated only during repair. Activity was localized to fibrotic portal triads containing PMNs. CONCLUSIONS Cholestatic injury results in increased fibrosis, MNPs, KCs, and PMNs but no MMP-2 or MMP-8 activity. Biliary decompression results in increased MMP-8 activity co-localized to areas of portal fibrosis and PMN accumulation. We conclude that secretion of MMP-8 by neutrophils may play a critical role in resolving the fibrotic scar generated during cholestasis.
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Affiliation(s)
- Mark W Harty
- Department of Surgery, Brown Medical School, Rhode Island and Hasbro Children's Hospitals, Providence 02903, USA
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Beck B, Ciszek M, Polaniak R, Beyga Z, Król W, Drozdz M, Shani J. The activity of ornithine transcarbamoylase and arginase during mechanical jaundice in the rat model. J Surg Res 2005; 126:19-26. [PMID: 15916970 DOI: 10.1016/j.jss.2005.01.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2004] [Revised: 01/06/2005] [Accepted: 01/07/2005] [Indexed: 11/22/2022]
Abstract
BACKGROUND The pathogenesis of morbidity and mortality associated with intervention of the biliary system in patients with obstructive jaundice is unknown. Mechanical jaundice initiates the development of morphological changes in hepatocytes with concomitant disturbances in metabolism. These are followed by changes in enzyme activity in hepatocytes and peripheral blood. MATERIAL AND METHODS Wistar rats were divided into three groups: group 1, sham-operated controls; group 2, rats with permanent jaundice; and group 3, rats with temporary mechanical jaundice. The animals were examined at 2 weeks (groups A), 4 weeks (groups B) and 6 weeks (groups C) after surgery. We explored the impact of induced mechanical jaundice on the activity of selected urea cycle enzymes (arginase [E.C.3.5.3.1] and ornithine transcarbamoylase (OTC) [E.C.2.1.3.3]). RESULTS Mechanical jaundice was found to induce changes in hepatocytic metabolism, which in turn led to disturbances in the urea cycle and the process of transamination. After relief of the mechanical jaundice (recanalization of the common bile duct), the urea cycle activity in the liver was greatly increased despite the normalization of the basic biochemical indices. CONCLUSION The results of the experiment confirmed the hypothesis that long-term mechanical jaundice causes lasting disturbances in hepatocytic metabolism. We conclude that the rate of nitrogen metabolism is higher after recanalization of the bile duct.
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Affiliation(s)
- Brygida Beck
- Department of Biochemistry, Medical University of Silesia, Zabrze, Poland.
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