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Heparan sulfate 2-O-sulfotransferase (Hs2st) and mouse development.
Valerie A Wilson1, John T Gallagher, Catherine L R Merry
1Institute for Stem Cell Research, University of Edinburgh, Edinburgh EH9 3JQ, UK.
Glycoconjugate Journal
|September 17, 2003
Summary
Heparan sulphate 2-O-sulphotransferase (Hs2st) is crucial for kidney development. Hs2st-deficient mice survive birth but exhibit kidney formation failure due to disrupted signaling, highlighting HS 2-O-sulphation
Area of Science:
- Biochemistry
- Developmental Biology
- Glycosaminoglycan Metabolism
Background:
- Heparan sulphate (HS) biosynthesis involves enzymes like Heparan sulphate 2-O-sulphotransferase (Hs2st).
- HS 2-O-sulphation is vital for HS interactions with growth factors and embryonic development.
- Hs2st plays a role in modulating growth factor signaling pathways.
Purpose of the Study:
- To investigate the role of Hs2st in kidney development.
- To analyze the HS structure and function in Hs2st-deficient mice.
- To identify signaling disruptions in Hs2st(-/-) kidneys.
Main Methods:
- Generation and analysis of Hs2st(-/-) mice.
- Phenotypic analysis of kidney development in mutant mice.
- Biochemical characterization of HS from Hs2st(-/-) embryos.
Main Results:
- Hs2st(-/-) mice survive until birth but die perinatally with failed kidney formation.
- Kidney development defects suggest disrupted signaling between ureteric bud and metanephric mesenchyme.
- HS in Hs2st(-/-) mice lacks 2-O-sulphate groups but shows increased O-sulphation at C-6 of glucosamine residues.
Conclusions:
- Hs2st-mediated 2-O-sulphation is essential for kidney organogenesis.
- Atypical HS structure in Hs2st(-/-) mice may alter growth factor signaling.
- Further research is needed to identify the specific signaling molecules involved.