Expression of Tissue Inhibitors of Metalloproteinases (TIMPs) in Hepatocellular Carcinoma.
- Author:
Young Eun JOO
1
;
Young Ho SEO
;
Wan Sik LEE
;
Hyun Soo KIM
;
Sung Kyu CHOI
;
Jong Sun REW
;
Chang Soo PARK
;
Sei Jong KIM
Author Information
1. Department of Internal Medicine, Chonnam National University Medical School, Kwangju, Korea.
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Tissue inhibitor of metalloproteinases;
Carcinoma, Hepatocellular;
Insitu hybridization;
Immunohistochemistry
- MeSH:
Adult;
Aged;
Carcinoma, Hepatocellular/pathology;
Carcinoma, Hepatocellular/metabolism*;
Female;
Human;
Immunohistochemistry;
Liver Neoplasms/pathology;
Liver Neoplasms/metabolism*;
Male;
Middle Age;
RNA, Messenger/analysis;
Tissue Inhibitor-of Metalloproteinase-2/physiology;
Tissue Inhibitor-of Metalloproteinase-2/genetics*;
Tissue Inhibitor-of Metalloproteinase-2/analysis;
Tissue-Inhibitor of Metalloproteinase-1/physiology;
Tissue-Inhibitor of Metalloproteinase-1/genetics*;
Tissue-Inhibitor of Metalloproteinase-1/analysis
- From:The Korean Journal of Internal Medicine
2000;15(3):171-178
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: Matrix metalloproteinases (MMPs) have been implicated in the remodelling of extracellular matrix (ECM), including basement membrane. ECM remodelling is associated with pathological processes, including hepatic fibrosis, tumor invasion and metastasis. Tissue inhibitors of metalloproteinase (TIMP)-1 and TIMP-2 were known to inhibit MMP-9 and MMP-2, respectively. In the present study, we examined the expression of TIMP-1 and TIMP-2 in surgical specimen pairs of hepatocellular carcinoma and nontumoral liver and the correlation between their expression and clinicopathological characteristics. METHODS: The localization of both transcripts and protein of TIMP-1 and TIMP-2 was studied by using in situ hybridization and immunohistochemistry. RESULTS: TIMP-1 and TIMP-2 mRNA transcripts were found in tumor cells, hepatocyte, sinusoidal cells, endothelial cells and stromal cells. Signal intensity of TIMP-1 was stronger than that of TIMP-2. The results of immunohistochemical stainings were concordant with those obtained by in situ hybridization. Expression of TIMP-1 and TIMP-2 was observed in tumorous tissue, in nontumorous tissue and in the portions of the tumors adjacent to the capsules. However, a clear difference in TIMP-1 and TIMP-2 mRNA expression was not observed among the three tissue types. The intensity of TIMP-2 expression was generally weaker than that of TIMP-1, and the intensity of TIMP-1 and TIMP-2 mRNA expression did not correlate with variable clinicopathological characteristics. CONCLUSION: TIMPs was expressed in tumor cells and many cell types of the nontumoral liver. Further investigations for TIMPs' unknown functional role are needed.
