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Heparan sulfate (HS) is a randomly sulfated polysaccharide that is present on the cell surface and in the extracellular matrix. The sulfated structures of HS were synthesized by multiple HS sulfotransferases, thereby regulating various activities such as growth factor signaling, cell differentiation, and tumor metastasis. Therefore, if the sulfated structures of HS could be artificially controlled, those manipulations would help to understand the various functions depending on HS. However, little knowledge is currently available to realize the mechanisms controlling the expression of such enzymes. In this study, we found that the ratio of 6-O-sulfated disaccharides increased at 3 h after adrenaline stimulation in mouse fibroblast cells. Furthermore, adrenaline-induced up-regulation of HS 6-O-sulfotransferase-1 (6-OST-1) was controlled by Src-ERK1/2 signaling pathway. Finally, inhibiting the signaling pathways for 6-OST-1 intentionally suppressed the adrenaline-induced structural alteration of HS. These observations provide fundamental insights into the understanding of structural alterations in HS by extracellular cues.

bioscience, biotechnology, and biochemistry

Structural alteration of cell surface heparan sulfate through the stimulation of the signaling pathway for heparan sulfate 6-<i>O</i>-sulfotransferase-1 in mouse fibroblast cells

Structural alteration of cell surface heparan sulfate through the stimulation of the signaling pathway for heparan sulfate 6-O-sulfotransferase-1 in mouse fibroblast cells