Abstract
Proteoglycans play key roles in the physiological assembly of extracellular matrices and in the modulation of growth factor activities. During liver regeneration there is a profound remodelling of the connective tissue network with a concurrent alteration in proteoglycan gene expression. In the present study we have analyzed in detail the biochemical and molecular properties of the proteoglycans associated with biliary cirrhosis. The three major proteoglycans of human liver, namely decorin, syndecan and perlecan, were markedly elevated in the cirrhotic parenchyma as compared to normal liver tissue. Particularly elevated (eight fold) was the perlecan. This proteoglycan had not only heparan sulfate but also chondroitin and der-matan sulfate. Reverse transcriptase PCR revealed a marked enhancement of decorin and syndecan expression and detectable message for perlecan was found only in the cirrhotic liver. These results indicate that significant proteoglycan alterations are associated with the development of biliary cirrhosis and provide basis for future studies aimed at the characterization of the molecular events involved in the regulation of extracellular matrix deposition in this common human disease.
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Abbreviations
- bFGF:
-
basic fibroblast growth factor
- BM:
-
basal membrane
- CS:
-
chondroitin sulfate
- CSPG:
-
chondroitin sulfate proteoglycan
- DEPC:
-
diethyl pyrocarbonate
- DS:
-
dermatan sulfate
- ECM:
-
extracellular matrix
- EDTA:
-
ethylenediaminetetraacetic acid
- EHS:
-
Engelberth-Holm-Swarm
- GAG:
-
glycosaminoglycan
- HPLC:
-
high performance liquid chromatography
- HS:
-
heparan sulfate
- HSPG:
-
heparan sulfate proteoglycan
- OD:
-
optical density
- PG:
-
proteoglycan
- RNA:
-
ribonucleic acid
- TCA:
-
trichloroacetic acid
- TFMS:
-
trifluoromethanesulfonic acid
- TGF - β:
-
transforming growth factor beta-1
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This work was supported in part by grants ETT M59 from the Hungarian Ministry of Health and T 017085 from the National Scientific Research Foundation. Dr. Iozzo was supported by NIH grants CA-39481 and CA-47282 and is the recipient of a Faculty Research Award (FRA-376) from the American Cancer Society.
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Kovalszky, I., O Nagy, J., Gallai, M. et al. Altered Proteoglycan Gene Expression in Human Biliary Cirrhosis. Pathol. Oncol. Res. 3, 51–58 (1997). https://doi.org/10.1007/BF02893354
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DOI: https://doi.org/10.1007/BF02893354