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Matrix Biol. 2003 Nov;22(6):511-7.

Molecular cloning, genomic organization and developmental expression of the Xenopus laevis hyaluronan synthase 3.

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Dipartimento di Biologia Strutturale e Funzionale, Via J.H. Dunant 3, Varese, Italy.


The content of hyaluronan (HA), a polymer of the extracellular matrix involved in a variety of physiological and pathological processes, depends on the activity of synthetic (HAS) and degrading enzymes. Since HA is also involved in embryogenesis, we have used Xenopus as a model organism because information is available for HAS1 and HAS2, but not for HAS3. We report the sequence of xlHAS3 mRNA, its genomic organization and its expression in adult tissues as well as during embryonic development. Interestingly, evidence from in situ hybridization indicates that xlHAS3 expression is restricted to the developing inner ear and cement gland. In addition, we have correlated the expression pattern of the enzymes involved in HA metabolism with the HA content during development.

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