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- W2020784037 abstract "The role of proteoglycans (PGs) in morphogenesis was investigated. Fetal kidneys were obtained from 13-day-old mouse embryos and maintained for 7 days in culture. The biosynthesis of PGs was perturbed by addition of p-nitrophenyl-beta-D-xylopyranoside in the culture medium. The kidneys were processed for morphological and biochemical studies. The morphological studies included staining of tissues with anti-basement membrane antibodies and ruthenium red. [35S]sulfate was used as the precursor product for biosynthetic and autoradiographic studies. The kidneys treated with xyloside had loose mesenchyme, inhibition of ureteric bud branching, diminution in the population of developing nephron elements, decreased immunofluorescence with anti-proteoglycan antibodies and staining with ruthenium red, and a reduced [35S]sulfate incorporation into poorly organized extracellular matrices. The biochemical studies included characterization of PGs/glycosaminoglycans (GAGs) by Sepharose CL-4B, -6B, and DEAE-Sephacel chromatographies and cellulose acetate electrophoresis. Under the influence of xyloside, the total radioactivities decreased 2 to 4-fold in tissues and increased 18 to 42-fold in media fractions. A reduction in the size of macromolecular form of PGs, i.e., from MW approximately 2.5 X 10(6) to approximately 2.5 X 10(4), was noted. The PGs/GAGs synthesized were mainly made up of heparan sulfate and small amounts of chondroitin sulfate. They eluted at a lower salt concentration as compared to the controls. A similar diminution in the size of media PGs, i.e., from MW approximately 1.8 X 10(5) to approximately 2.8 X 10(4), was observed. Additional studies with [3H]xyloside indicated that the chains initiated on xyloside residues were similar in size and composition to GAG-chains. These findings indicate that a perturbance in the biosynthesis of PGs/GAGs leads to abnormalities in renal organogenesis." @default.
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- W2020784037 date "1988-08-01" @default.
- W2020784037 modified "2023-10-15" @default.
- W2020784037 title "Role of proteoglycans in renal development" @default.
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- W2020784037 doi "https://doi.org/10.1016/0012-1606(88)90289-8" @default.
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