Basement membrane and interstitial proteoglycans produced by MDCK cells correspond to those expressed in the kidney cortex.

Research output: Contribution to journalJournal articleResearchpeer-review

A C Erickson, J R Couchman

Multiple proteoglycans (PGs) are present in all basement membranes (BM) and may contribute to their structure and function, but their effects on cell behavior are not well understood. Their postulated functions include: a structural role in maintaining tissue histoarchitecture, or aid in selective filtration processes; sequestration of growth factors; and regulation of cellular differentiation. Furthermore, expression PGs has been found to vary in several disease states. In order to elucidate the role of PGs in the BM, a well-characterized model of polarized epithelium, Madin-Darby canine kidney (MDCK) cells has been utilized. Proteoglycans were prepared from conditioned medium by DEAE anion exchange chromatography. The eluted PGs were treated with heparitinase or chondroitinase ABC (cABC), separately or combined, followed by SDS-PAGE. Western blot analysis, using antibodies specific for various PG core proteins or CS stubs generated by cABC treatment, revealed that both basement membrane and interstitial PGs are secreted by MDCK cells. HSPGs expressed by MDCK cells are perlecan, agrin, and collagen XVIII. Various CSPG core proteins are made by MDCK cells and have been identified as biglycan, bamacan, and versican (PG-M). These PGs are also associated with mammalian kidney tubules in vivo.
Original languageEnglish
JournalMatrix Biology
Volume19
Issue number8
Pages (from-to)769-78
Number of pages9
ISSN0945-053X
Publication statusPublished - 2001

Bibliographical note

Keywords: Amino Acid Sequence; Animals; Basement Membrane; Cell Line; Chondroitin ABC Lyase; Chondroitin Sulfates; Collagen; Dermatan Sulfate; Dogs; Extracellular Space; Heparan Sulfate Proteoglycans; Heparitin Sulfate; Humans; Kidney Cortex; Mice; Molecular Sequence Data; Polysaccharide-Lyases; Proteoglycans; Rats

ID: 5163258