Biomaterial Database

Expression of immunoreactive matrix metalloproteinases and tissue inhibitors of matrix metalloproteinases in human normal livers and primary liver tumors. 1996

T Terada, and Y Okada, and Y Nakanuma

Second Department of Pathology, Kanazawa University School of Medicine, Japan.

Matrix metalloproteinases (MMPs) play an important role in cancer cell invasion by degrading extracellular matrix proteins. However, little is known about the in situ expression of MMP in human normal livers and primary liver tumors. In this study, we therefore examined the in situ expression of immunoreactive MMP and tissue inhibitors of MMP (TIMP) in 10 normal livers, 11 surgically resected intrahepatic cholangiocarcinomas (CCs), and 6 surgically resected hepatocellular carcinomas (HCCs). In normal livers, MMP and TIMP were infrequently and faintly expressed in bile ducts, but were not expressed in hepatocytes. In the 11 CCs, MMP-1, MMP-2, MMP3, MMP-9, TIMP-1, and TIMP-2 were expressed in tumor cells and/or tumor stroma in 11 (100%), 5 (45%), 8 (73%), 3 (27%), 9 (82%), and 9 (82%), respectively. The expression of MMP and TIMP in tumor cells was located in the cytoplasm with a diffuse or granular pattern; that in the tumor stroma was situated in fibroblasts, leukocytes, and extracellular matrix. Their expression was stronger in CC cases with severe invasion than in CC cases with mild invasion. In contrast, MMP and TIMP were not expressed in any cases of HCC. These results show that intrahepatic bile duct cells may neoexpress or overexpress MMP and TIMP after malignant transformation but that hepatocytes do not, and suggest that MMP and TIMP play an important role in CC cell invasion by degrading extracellular matrix proteins.

UI	MeSH Term	Description	Entries
D007150	Immunohistochemistry	Histochemical localization of immunoreactive substances using labeled antibodies as reagents.	Immunocytochemistry,Immunogold Techniques,Immunogold-Silver Techniques,Immunohistocytochemistry,Immunolabeling Techniques,Immunogold Technics,Immunogold-Silver Technics,Immunolabeling Technics,Immunogold Silver Technics,Immunogold Silver Techniques,Immunogold Technic,Immunogold Technique,Immunogold-Silver Technic,Immunogold-Silver Technique,Immunolabeling Technic,Immunolabeling Technique,Technic, Immunogold,Technic, Immunogold-Silver,Technic, Immunolabeling,Technics, Immunogold,Technics, Immunogold-Silver,Technics, Immunolabeling,Technique, Immunogold,Technique, Immunogold-Silver,Technique, Immunolabeling,Techniques, Immunogold,Techniques, Immunogold-Silver,Techniques, Immunolabeling
D008099	Liver	A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances.	Livers
D008113	Liver Neoplasms	Tumors or cancer of the LIVER.	Cancer of Liver,Hepatic Cancer,Liver Cancer,Cancer of the Liver,Cancer, Hepatocellular,Hepatic Neoplasms,Hepatocellular Cancer,Neoplasms, Hepatic,Neoplasms, Liver,Cancer, Hepatic,Cancer, Liver,Cancers, Hepatic,Cancers, Hepatocellular,Cancers, Liver,Hepatic Cancers,Hepatic Neoplasm,Hepatocellular Cancers,Liver Cancers,Liver Neoplasm,Neoplasm, Hepatic,Neoplasm, Liver
D008297	Male		Males
D008666	Metalloendopeptidases	ENDOPEPTIDASES which use a metal such as ZINC in the catalytic mechanism.	Metallo-Endoproteinases,Metalloendopeptidase
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D011480	Protease Inhibitors	Compounds which inhibit or antagonize biosynthesis or actions of proteases (ENDOPEPTIDASES).	Antiprotease,Endopeptidase Inhibitor,Endopeptidase Inhibitors,Peptidase Inhibitor,Peptidase Inhibitors,Peptide Hydrolase Inhibitor,Peptide Hydrolase Inhibitors,Peptide Peptidohydrolase Inhibitor,Peptide Peptidohydrolase Inhibitors,Protease Antagonist,Protease Antagonists,Antiproteases,Protease Inhibitor,Antagonist, Protease,Antagonists, Protease,Hydrolase Inhibitor, Peptide,Hydrolase Inhibitors, Peptide,Inhibitor, Endopeptidase,Inhibitor, Peptidase,Inhibitor, Peptide Hydrolase,Inhibitor, Peptide Peptidohydrolase,Inhibitor, Protease,Inhibitors, Endopeptidase,Inhibitors, Peptidase,Inhibitors, Peptide Hydrolase,Inhibitors, Peptide Peptidohydrolase,Inhibitors, Protease,Peptidohydrolase Inhibitor, Peptide,Peptidohydrolase Inhibitors, Peptide
D011506	Proteins	Linear POLYPEPTIDES that are synthesized on RIBOSOMES and may be further modified, crosslinked, cleaved, or assembled into complex proteins with several subunits. The specific sequence of AMINO ACIDS determines the shape the polypeptide will take, during PROTEIN FOLDING, and the function of the protein.	Gene Products, Protein,Gene Proteins,Protein,Protein Gene Products,Proteins, Gene
D005260	Female		Females
D006023	Glycoproteins	Conjugated protein-carbohydrate compounds including MUCINS; mucoid, and AMYLOID glycoproteins.	C-Glycosylated Proteins,Glycosylated Protein,Glycosylated Proteins,N-Glycosylated Proteins,O-Glycosylated Proteins,Glycoprotein,Neoglycoproteins,Protein, Glycosylated,Proteins, C-Glycosylated,Proteins, Glycosylated,Proteins, N-Glycosylated,Proteins, O-Glycosylated