Objoctive To investigate the effects of quercetin and X-ray on collagen synthesis of cultured human keloid-derived fibroblast and the mechanism. Methods Collagen synthesis of cultured human keloid and normal fibroblas...Objoctive To investigate the effects of quercetin and X-ray on collagen synthesis of cultured human keloid-derived fibroblast and the mechanism. Methods Collagen synthesis of cultured human keloid and normal fibroblasts were detected by hydroxyproline colorimetric analysis. Immunocytochemical staining was used to investigate collagen I and III expression, mRNA expression of collagen Ⅰ and Ⅲ, and transforming growth factor ( TGF)-β1 were assayed by reverse transcription-polymerase chain reaction (RT-PCR) and real-time PCR. Results Quercetin inhibited the collagen synthesis of both keloid and normal fibroblasts in a dose-dependent man- ner. Immunocytochemical staining indicated that collagenⅠ and Ⅲ were down-regulated by quercetin and X-ray (P 〈 0.05 ), particularly collagen I ( P 〈 0. 05 ). mRNA expression of both collagen I and III in quercetin groups significantly decreased compared with that in control group ( P 〈 0. 05 ), especially in the group treated with both quercetin and X-ray ( P 〈 0. 01 ). mRNA level of TGF-[31 gene was down-regulated by quercertin ( P 〈 0. 05 ). Conclusions Quercetin will probably be one of the new medicines which could effectively treat keloid. Quercetin combined with X-ray could reduce the dose of radiation.展开更多
文摘Objoctive To investigate the effects of quercetin and X-ray on collagen synthesis of cultured human keloid-derived fibroblast and the mechanism. Methods Collagen synthesis of cultured human keloid and normal fibroblasts were detected by hydroxyproline colorimetric analysis. Immunocytochemical staining was used to investigate collagen I and III expression, mRNA expression of collagen Ⅰ and Ⅲ, and transforming growth factor ( TGF)-β1 were assayed by reverse transcription-polymerase chain reaction (RT-PCR) and real-time PCR. Results Quercetin inhibited the collagen synthesis of both keloid and normal fibroblasts in a dose-dependent man- ner. Immunocytochemical staining indicated that collagenⅠ and Ⅲ were down-regulated by quercetin and X-ray (P 〈 0.05 ), particularly collagen I ( P 〈 0. 05 ). mRNA expression of both collagen I and III in quercetin groups significantly decreased compared with that in control group ( P 〈 0. 05 ), especially in the group treated with both quercetin and X-ray ( P 〈 0. 01 ). mRNA level of TGF-[31 gene was down-regulated by quercertin ( P 〈 0. 05 ). Conclusions Quercetin will probably be one of the new medicines which could effectively treat keloid. Quercetin combined with X-ray could reduce the dose of radiation.