Abstract
1. A simple method is described for the determination of small amounts of [(35)S]sulphated polysaccharide with 95-100% recovery in the range from 0.3 to 150mug of polysaccharide. 2. The method is based on precipitation with cetylpyridinium chloride of polysaccharide samples applied to filter paper. It is not significantly disturbed by the presence in the sample of a large excess of inorganic (35)SO(4) (2-). 3. Sulphated glucosamino- and galactosaminoglycans may be determined separately by treatment of the sample with chondroitinase ABC. 4. The method is applicable to the assay of [(35)S]sulphated polysaccharide biosynthesis in cell cultures. A stimulation of sulphate incorporation obeying a linear dose-response curve, was demonstrated in somatomedin-incubated fibroblast and glia cell cultures. 5. The described system provides a new assay method for somatomedin. 6. The stimulatory effect of somatomedin on the synthesis of [(35)S]sulphated polysaccharide appeared to be general, rather than specific, for a particular type of polysaccharide.
MeSH Terms
Cells, Cultured/drug effects
Cetylpyridinium
Chemical Precipitation
Chondroitin
Dose-Response Relationship, Drug
Fibroblasts/metabolism
Galactosamine/analysis
Glucosamine/analysis
Humans
Lyases/pharmacology
Methods
Neuroglia/metabolism
Polysaccharides/analysis,biosynthesis
Somatomedins/pharmacology
Sulfates/biosynthesis
Sulfur Radioisotopes
Chemicals
Polysaccharides
Somatomedins
Sulfates
Sulfur Radioisotopes
Galactosamine
Chondroitin
Cetylpyridinium
Lyases
Glucosamine
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Wasteson A
Uthne K
Westermark B
References (21)
21 references, click to expand
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