Biomaterial Database

Differential expression of keratan sulphate proteoglycans fibromodulin, lumican and aggrecan in normal and fibrotic rat liver. 1992

N B Krull, and A M Gressner

Department of Clinical Chemistry, Philipps University, Marburg, Germany.

In this study we investigated in rat liver the expression of genes coding for the core proteins of fibromodulin, lumican and aggrecan. By means of Northern analysis and in situ hybridization we present evidence for their differential transcription during liver fibrogenesis. Whereas no fibromodulin expression could been detected, both lumican and aggrecan transcripts were found displaying different time-courses of expression during the fibrogenic process. Based on studies performed in non-hepatic tissues, these proteoglycans are considered to have keratan sulphate glycosaminoglycan side chains. The expression of the respective core protein genes in liver is unexpected since published data have shown neither keratan sulphate nor its synthesis de novo in this tissue. The results also point to a putative role of aggrecan in the modulation of the inflammatory process in the liver.

UI	MeSH Term	Description	Entries
D007632	Keratan Sulfate	A sulfated mucopolysaccharide initially isolated from bovine cornea. At least two types are known. Type I, found mostly in the cornea, contains D-galactose and D-glucosamine-6-O-sulfate as the repeating unit; type II, found in skeletal tissues, contains D-galactose and D-galactosamine-6-O-sulfate as the repeating unit.	Keratosulfate,Sulfate, Keratan
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
D008106	Liver Cirrhosis, Experimental	Experimentally induced chronic injuries to the parenchymal cells in the liver to achieve a model for LIVER CIRRHOSIS.	Hepatic Cirrhosis, Experimental,Cirrhoses, Experimental Liver,Cirrhosis, Experimental Liver,Experimental Liver Cirrhoses,Experimental Liver Cirrhosis,Liver Cirrhoses, Experimental,Experimental Hepatic Cirrhosis
D011508	Chondroitin Sulfate Proteoglycans	Proteoglycans consisting of proteins linked to one or more CHONDROITIN SULFATE-containing oligosaccharide chains.	Proteochondroitin Sulfates,Chondroitin Sulfate Proteoglycan,Proteochondroitin Sulfate,Proteoglycan, Chondroitin Sulfate,Proteoglycans, Chondroitin Sulfate,Sulfate Proteoglycan, Chondroitin,Sulfate Proteoglycans, Chondroitin
D011509	Proteoglycans	Glycoproteins which have a very high polysaccharide content.	Proteoglycan,Proteoglycan Type H
D002352	Carrier Proteins	Proteins that bind or transport specific substances in the blood, within the cell, or across cell membranes.	Binding Proteins,Carrier Protein,Transport Protein,Transport Proteins,Binding Protein,Protein, Carrier,Proteins, Carrier
D004247	DNA	A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).	DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D005260	Female		Females
D000071234	Lumican	A small leucine-rich proteoglycan that contains 10 tandem leucine repeats and four N-linked sites within the leucine repeat region that may be substituted with KERATAN SULFATE. These properties and its horseshoe shape allow it to mediate interactions among COLLAGEN molecules within fibrils. It is expressed in most mesenchymal tissues as well as the CORNEA, where it functions to maintain transparency.	Lumican Proteoglycan
D000071235	Fibromodulin	A small leucine-rich proteoglycan that contains 4 KERATAN SULFATE chains within the leucine repeat region. It interacts with COLLAGEN TYPE I and COLLAGEN TYPE II fibrils and may function to control the rate of EXTRACELLULAR MATRIX assembly. It also sequesters TRANSFORMING GROWTH FACTOR BETA in the extracellular matrix.	FMOD Protein