Abstract
Fibrotic processes in tissues are characterised by an excessive accumulation of collagen containing increased levels of pyridinoline cross-links, which has been taken as an important criterion to diagnose the fibrosis. Hypocrellin B (HB) is a natural photosensitizer with excellent photodynamic activity but very low dark-toxicity. In the current work, main purpose was to clarify if photodynamic action of HB could be applied to regulating the level of pyridinoline cross-link in collagen. To use gelatin as a model collagen, it was observed that the pyridinoline cross-link formation was effectively degraded by HB photodynamic action in the gelatin, suggesting the level of pyridinoline cross-link formation in collagen may be photodynamically regulated to a normal level. Furthermore, mechanism of the photodynamic action of HB was studied.
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Supported by the Natural Science Foundation of Yunnan Province (Grant No. 2005C0078M) and Scientific Research Startup Project Foundation of Honghe University (Grant No. XSS07012)
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Zhang, J., Liu, W., Yi, Z. et al. The molecular mechanism of photodynamic therapy to fibrosis: Regulation on the pyridinoline cross-link formation in collagen. Chin. Sci. Bull. 54, 2230–2234 (2009). https://doi.org/10.1007/s11434-009-0420-z
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DOI: https://doi.org/10.1007/s11434-009-0420-z