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- W1929379028 endingPage "1623" @default.
- W1929379028 startingPage "1613" @default.
- W1929379028 abstract "ABSTRACT Heparan sulfate proteoglycans (HSPG) regulate multiple cellular processes and mediate the cellular uptake of numerous molecules. While heparan sulphate glycosaminoglycan chains are known to modulate receptor binding of several heparin-binding proteins, here we show that distinct extracellular matrices direct HSPG to the nucleus. We analyzed HSPG localization in primary corneal fibroblasts, cultured on fibronectin or collagen type I matrices, using confocal laser scanning microscopy and cell fractionation. Image analysis revealed that the nuclear localization of HSPG core proteins was greater when cells were cultured on fibronectin versus collagen. Matrices containing the heparin-binding domain of fibronectin, but not the integrin-activating domain, demonstrated increased nuclear staining of core proteins. Furthermore, activation of protein kinase C with phorbol 12-myristate 13-acetate inhibited nuclear targeting of HSPG in cells on fibronectin, whereas inhibition of protein kinase C with Ro-31-8220 greatly enhanced nuclear localization of HSPG in cells on both collagen and fibronectin. We propose a matrix-dependent mechanism for nuclear localization of cell surface HSPG involving protein kinase C-mediated signaling. Nuclear localization of HSPG might play important roles in regulating nuclear function." @default.
- W1929379028 created "2016-06-24" @default.
- W1929379028 creator A5011040426 @default.
- W1929379028 creator A5032119599 @default.
- W1929379028 creator A5074638151 @default.
- W1929379028 date "2001-05-01" @default.
- W1929379028 modified "2023-09-23" @default.
- W1929379028 title "Regulation of heparan sulfate proteoglycan nuclear localization by fibronectin" @default.
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- W1929379028 doi "https://doi.org/10.1242/jcs.114.9.1613" @default.
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