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Proteoglycan alterations in skin fibroblast cultures from patients affected with pseudoxanthoma elasticum. 1996

A Passi, and R Albertini, and M Baccarani Contri, and G de Luca, and A de Paepe, and G Pallavicini, and I Pasquali Ronchetti, and R Tiozzo
Department of Biochemistry A. Castellani, University of Pavia, Italy.

Proteoglycans (PGs) were investigated in fibroblast cultures from both apparently normal and involved areas of skin from two patients affected with Pseudoxanthoma elasticum (PXE) and compared to control normal cells. Biochemical analysis showed that cells from the PXE-affected patients produced a PG population with stronger polyanion properties, as well as a markedly increased amount of high hydrodynamic-size PGs. Moreover, PGs from PXE-affected cells showed abnormal hydrophobic interaction properties when examined under associative conditions and included heparan sulphate (HS)-containing populations with anomalous electrophoretic mobility. These phenomena were particularly evident in the case of PGs secreted into the growth medium. In agreement with these findings immunohistochemical study showed alterations affecting decorin and biglycan, as well as a different content and distribution of HS-PGs in PXE-affected cells. The same biochemical and morphological alterations were confirmed for both patients on different cell cultures and were present in cells from both apparently normal and affected skin areas, being more pronounced in the latter. Our results indicate that PXE-affected fibroblasts in culture exhibit an abnormal PG metabolism, which could affect the normal assembly of extracellular matrix.

UI MeSH Term Description Entries
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008903 Minerals Native, inorganic or fossilized organic substances having a definite chemical composition and formed by inorganic reactions. They may occur as individual crystals or may be disseminated in some other mineral or rock. (Grant & Hackh's Chemical Dictionary, 5th ed; McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Mineral
D011509 Proteoglycans Glycoproteins which have a very high polysaccharide content. Proteoglycan,Proteoglycan Type H
D011561 Pseudoxanthoma Elasticum An inherited disorder of connective tissue with extensive degeneration and calcification of ELASTIC TISSUE primarily in the skin, eye, and vasculature. At least two forms exist, autosomal recessive and autosomal dominant. This disorder is caused by mutations of one of the ATP-BINDING CASSETTE TRANSPORTERS. Patients are predisposed to MYOCARDIAL INFARCTION and GASTROINTESTINAL HEMORRHAGE. Gronblad-Strandberg Syndrome,Groenblad-Strandberg Syndrome,Pseudoxanthoma Elasticum, Autosomal Dominant,Pseudoxanthoma Elasticum, Forme Fruste,Pseudoxanthoma Elasticum, Incomplete,Elasticum, Incomplete Pseudoxanthoma,Elasticums, Incomplete Pseudoxanthoma,Gronblad Strandberg Syndrome,Incomplete Pseudoxanthoma Elasticum,Incomplete Pseudoxanthoma Elasticums,Pseudoxanthoma Elasticums, Incomplete,Syndrome, Gronblad-Strandberg
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D002852 Chromatography, Ion Exchange Separation technique in which the stationary phase consists of ion exchange resins. The resins contain loosely held small ions that easily exchange places with other small ions of like charge present in solutions washed over the resins. Chromatography, Ion-Exchange,Ion-Exchange Chromatography,Chromatographies, Ion Exchange,Chromatographies, Ion-Exchange,Ion Exchange Chromatographies,Ion Exchange Chromatography,Ion-Exchange Chromatographies
D003636 DEAE-Cellulose Cellulose derivative used in chromatography, as ion-exchange material, and for various industrial applications. Diethylaminoethyl Cellulose,DEAE Cellulose
D004549 Elastin alpha-Elastin,kappa-Elastin,alpha Elastin,kappa Elastin
D004591 Electrophoresis, Polyacrylamide Gel Electrophoresis in which a polyacrylamide gel is used as the diffusion medium. Polyacrylamide Gel Electrophoresis,SDS-PAGE,Sodium Dodecyl Sulfate-PAGE,Gel Electrophoresis, Polyacrylamide,SDS PAGE,Sodium Dodecyl Sulfate PAGE,Sodium Dodecyl Sulfate-PAGEs
D005109 Extracellular Matrix A meshwork-like substance found within the extracellular space and in association with the basement membrane of the cell surface. It promotes cellular proliferation and provides a supporting structure to which cells or cell lysates in culture dishes adhere. Matrix, Extracellular,Extracellular Matrices,Matrices, Extracellular

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