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- W239494275 abstract "Intracellular proteoglycans (PG), putative markers of mast cell subtype, were isolated and characterized from three dog mastocytome cell lines. Mastocytoma cells were adapted to serial passage as subcutaneous tumors in BALB/c nude mice for 10 generations. Cells were disaggregated and labeled with (number/sup 5/S)SO/sub 4/ in culture. Intracellular /sup 35/S-labeled PG were isolated by sonication in 4M guanidine containing protease and glycosidase inhibitors, then chromatographed on Sepharose CL-4B. All 3 cell lines yielded a major /sup 35/S component at the Vo (Mr greater than or equal to 10/sup 6/). Excluded fractions were treated with alkaline-borohydride and the liberated glycosaminoglycans (GAG) were analyzed on Sephacryl S-200. GAG chains had an apparent Mr of 40-50,000. GAG chains were subjected to chondroitinase ABC and nitrous acid degradation and the products were analyzed on Sepharcyl S-200. In one cell line (BR), 75% of /sup 35/S-labeled GAG was resistant to chondroitinase treatment, but was degraded by nitrous acid, characteristic of heparin. The remaining 25% of /sup 35/S-labeled GAG was degraded to oligosaccharides by chondroitinase indicating chondroitin sulfate (CS). A second cell line (G) also contained both heparin and CS-PG. The remaining cell line (C2) contained 2% heparin-PG and 98% CS-PG. The results demonstrate the simultaneousmore » presence of both heparin and CS-PG in mast cells of clonal origin, and raise important questions on the role of PGs in mast cell granule storage and release mechanisms.« less" @default.
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- W239494275 date "1987-05-01" @default.
- W239494275 modified "2023-09-23" @default.
- W239494275 title "Both heparin and chondroitin sulfate proteoglycans are intracellular components of dog mastocytoma cell lines" @default.
- W239494275 hasPublicationYear "1987" @default.
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