Abstract
To investigate the effect of polypeptide fromChlamys farreri (PCF) on NHDFin vitro, we modeled oxidative damage on normal human dermal fibroblasts (NHDF) exposed to ultraviolet B (UVB). In this study, 3-[4,5-Dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) were tested to measure cell viability. Enzymes including superoxide dismutase (SOD), glutathione peroxidase (GSH-PX), catalase (CAT) and xanthine oxidase (XOD) were determined biochemically. Total antioxidative capacity (T-AOC) and anti-superoxide anion capacity (A-SAC) were also determined. Ultrastructure of fibroblasts was observed under transmission electron microscope. The results showed that: UVB (1.176×10−4 J/cm2) suppressed the growth of fibroblasts and the introduction of PCF (0.25%–1%) before UVB reduced the suppression in a concentration-dependent manner. PCF could enhance the activities of SOD, GSH-PX and T-AOC as well as A-SAC. Also PCF could inhibit XOD activity, while it did not affect CAT activity. Ultrastructure of fibroblasts were damaged after UVB irradiation, concentration-dependent PCF reduced the destructive effect of UVB on cells. These results indicated that PCF can protect human dermal fibroblasts from being harmed by UVB irradiation via its antioxidant proerty.
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This work was supported by the National Natural Science Foundation of China (No. 39970638) and the Science and Technology Bureau of Qingdao (No. 2001-28-50).
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Yujiang, Z., Songmei, Z., Pengli, C. et al. The polypeptide inChlamys farreri can protect human dermal fibroblasts from ultraviolet B damage. Chin. J. Ocean. Limnol. 23, 357–362 (2005). https://doi.org/10.1007/BF02847161
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DOI: https://doi.org/10.1007/BF02847161