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A seminal perspective on the role of chondroitin sulfate in biomineralization

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CARBOHYDRATE POLYMERS
卷 310, 期 -, 页码 -

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ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2023.120738

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Amorphous calcium phosphate; Chondroitin sulfate; Heterotopic ossification; Intrafibrillar mineralization; Proteoglycans

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Chondroitin sulfate (CS) is found to induce mineralization of the collagen matrix, suggesting its potential role in bone tissue repair and biomineralization. The mineralization outcome depends on whether CS is in a free state or bound to core proteins, and it is enhanced with higher CS concentration. These findings shed light on the therapeutic target for diseases associated with heterotopic calcification and the applications of CS in tissue engineering.
Chondroitin sulfate (CS) is an important extracellular matrix component of mineralized tissues. It participates in biomineralization, osteoblast differentiation and promotes bone tissue repair in vitro. However, the mechanism in which CS functions is unclear. Accordingly, an in-depth investigation of how CS participates in mineralization was conducted in the present study. Chondroitin sulfate was found to directly induce intrafibrillar mineralization of the collagen matrix. The mineralization outcome was dependent on whether CS remained free in the extracellular matrix or bound to core proteins; mineralization only occurred when CS existed in a free state. The efficacy of mineralization appeared to increase with ascending CS concentration. This discovery spurred the authors to identify the cause of heterotopic ossification in the Achilles tendon. Chondroitin sulfate appeared to be a therapeutic target for the management of diseases associated with heterotopic calcification. A broader perspective was presented on the applications of CS in tissue engineering.

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