Abstract
Syndecan-1 is a cell-surface heparan-sulphate proteoglycan that is involved in growth factor regulation, cell adhesion, proliferation, differentiation, blood coagulation, lipid metabolism, as well as tumour formation. In this study, investigation of discrete LCM captured dermal cells by semi-quantitative RT-PCR revealed Syndecan-1 mRNA transcripts were expressed only in the dermal condensation (DC) within this skin compartment during murine pelage hair follicle (HF) morphogenesis. Further immunofluorescence studies showed that, during early skin development, Syndecan-1 was expressed in the epidermis while being absent from the mesenchyme. As HF morphogenesis began (∼E14.5) Syndecan-1 expression was lost from the epithelial compartment of the HF and activated in HF mesenchymal cells. This Syndecan-1 expression profile was consistent between different hair follicle types including primary and secondary pelage, vibrissa, and tail hair follicles. Furthermore we show by using gene targeted mice lacking Syndecan-1 expression that Syndecan-1 is not required for follicle initiation and development.
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