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  • Title: Chondroitin sulfate proteoglycan and heparan sulfate proteoglycan production by cultured pigeon peritoneal macrophages.
    Author: Owens RT, Wagner WD.
    Journal: J Leukoc Biol; 1992 Jun; 51(6):626-33. PubMed ID: 1613397.
    Abstract:
    Proteoglycan production was examined in cultures of thioglycollate-elicited peritoneal macrophages obtained from White Carneau and Show Racer pigeons. Following a 24-h incubation in the presence of [35S]sulfate and [3H]serine, total production and distribution of 35S-labeled proteoglycan into media (60-65%), pericellular (21-27%), and intracellular (13-14%) compartments was similar in White Carneau and Show Racer macrophage cultures. Media proteoglycans consisted of high-molecular-weight chondroitin sulfate proteoglycan, low-molecular-weight chondroitin sulfate proteoglycan, and heparan sulfate proteoglycan. High-molecular-weight chondroitin sulfate proteoglycan was predominantly 6-sulfated (80%) and contained a core protein larger than 200 kd, whereas low-molecular-weight chondroitin sulfate proteoglycan was 4-sulfated and contained a 28-kd core protein. Pericellular proteoglycan was similar in size to low-molecular-weight proteoglycan and consisted of a predominantly 6-sulfated (75%) chondroitin sulfate proteoglycan and heparan sulfate proteoglycan. Intracellular 35S-labeled chondroitin sulfate and heparan sulfate were smaller than media and pericellular proteoglycans, suggestive of intracellular degradative processing.
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