Objective:Hypertrophic scars(HS)are a variety of skin tissue fibrosis disease that occurs in human skin,the effective therapeutic method of which is still inaccessible up to now.As a bioactive constituent of a well-kn...Objective:Hypertrophic scars(HS)are a variety of skin tissue fibrosis disease that occurs in human skin,the effective therapeutic method of which is still inaccessible up to now.As a bioactive constituent of a well-known medical plant,Salvia miltiorrhiza(Danshen in Chinese),tanshinone Ⅱ_(A)(TSA)is reported to inhibit cell proliferation in HS.Therefore,the aim of this study was to prepare TSA self-soluble microneedles to strengthen its dermal retention and break through the difficulty of significantly thickening epidermal connective tissue and stratum corneum at the HS site.The possible mechanism of action in suppressing HS was studied using human skin fibroblasts(HSF).Methods:Tanshinone Ⅱ_(A) self-dissolving microneedles(TSA-MN)was prepared using a negative mold casting method.The prescription process of microneedle was optimized by Box-Behnken effect surface method.Different media were selected to investigate the ability of transdermal absorption and in vitro release.Furthermore,according to Cell Counting Kit-8(CCK8)method as well as the Western blot method,the effect of TSA-MN on the biological characteristics of HSF was investigated.Results:With remarkable slow release effect and dermal retention,the release and transdermal properties of TSA-MN in vitro were better than both TSA and ordinary dosage forms.Its effect of HSF confirmed the essential decrease in cell motility during cell proliferation and cell migration in vitro,which plays a significant role in down-regulating the secretion of transforming growth factor-β1(TGF-β1)in HSF and increasing the expression level of Smad7.Conclusion:The prepared TSA self-soluble microneedles is helpful in solving the problem of hypertrophic scars,with a stable dermal retention effect after process optimization.展开更多
目的研究补骨脂素对人皮肤成纤维细胞(ESF-1)衰老相关基因的影响。方法以雌二醇为阳性对照,采用MTT法检测补骨脂素高、中、低剂量组(100,10,1μmol·L-1)对细胞增殖的影响,用RT-PCR技术检测补骨脂素作用于ESF-1细胞后对衰老相关基...目的研究补骨脂素对人皮肤成纤维细胞(ESF-1)衰老相关基因的影响。方法以雌二醇为阳性对照,采用MTT法检测补骨脂素高、中、低剂量组(100,10,1μmol·L-1)对细胞增殖的影响,用RT-PCR技术检测补骨脂素作用于ESF-1细胞后对衰老相关基因Ⅰ型胶原蛋白(ColⅠ)、Ⅲ型胶原蛋白(ColⅢ)、基质金属蛋白酶1(MMP-1)、基质金属蛋白酶抑制剂1(TIMP-1)及基质金属蛋白酶抑制剂2(TIMP-2)mRNA表达水平的影响。结果补骨脂素中剂量组的作用与雌二醇相似,能使ESF-1细胞的增殖明显提高,同时使ColⅠ、ColⅢ、T I M P-1、TIMP-2 mRNA的表达水平显著增强,MMP-1 mRNA的表达水平显著降低。结论补骨脂素具有促E S F-1细胞增殖的作用,可促进胶原蛋白合成,提示其具有潜在的抗皮肤衰老作用。展开更多
基金supported by the National Natural Science Foundation of China(No.82173982,2021)the Guangdong Natural Science Project(No.2018A0303130234)Excellent Young Teachers Training Project in Higher Education of Guangdong(No.YQ2015099).
文摘Objective:Hypertrophic scars(HS)are a variety of skin tissue fibrosis disease that occurs in human skin,the effective therapeutic method of which is still inaccessible up to now.As a bioactive constituent of a well-known medical plant,Salvia miltiorrhiza(Danshen in Chinese),tanshinone Ⅱ_(A)(TSA)is reported to inhibit cell proliferation in HS.Therefore,the aim of this study was to prepare TSA self-soluble microneedles to strengthen its dermal retention and break through the difficulty of significantly thickening epidermal connective tissue and stratum corneum at the HS site.The possible mechanism of action in suppressing HS was studied using human skin fibroblasts(HSF).Methods:Tanshinone Ⅱ_(A) self-dissolving microneedles(TSA-MN)was prepared using a negative mold casting method.The prescription process of microneedle was optimized by Box-Behnken effect surface method.Different media were selected to investigate the ability of transdermal absorption and in vitro release.Furthermore,according to Cell Counting Kit-8(CCK8)method as well as the Western blot method,the effect of TSA-MN on the biological characteristics of HSF was investigated.Results:With remarkable slow release effect and dermal retention,the release and transdermal properties of TSA-MN in vitro were better than both TSA and ordinary dosage forms.Its effect of HSF confirmed the essential decrease in cell motility during cell proliferation and cell migration in vitro,which plays a significant role in down-regulating the secretion of transforming growth factor-β1(TGF-β1)in HSF and increasing the expression level of Smad7.Conclusion:The prepared TSA self-soluble microneedles is helpful in solving the problem of hypertrophic scars,with a stable dermal retention effect after process optimization.
文摘目的研究补骨脂素对人皮肤成纤维细胞(ESF-1)衰老相关基因的影响。方法以雌二醇为阳性对照,采用MTT法检测补骨脂素高、中、低剂量组(100,10,1μmol·L-1)对细胞增殖的影响,用RT-PCR技术检测补骨脂素作用于ESF-1细胞后对衰老相关基因Ⅰ型胶原蛋白(ColⅠ)、Ⅲ型胶原蛋白(ColⅢ)、基质金属蛋白酶1(MMP-1)、基质金属蛋白酶抑制剂1(TIMP-1)及基质金属蛋白酶抑制剂2(TIMP-2)mRNA表达水平的影响。结果补骨脂素中剂量组的作用与雌二醇相似,能使ESF-1细胞的增殖明显提高,同时使ColⅠ、ColⅢ、T I M P-1、TIMP-2 mRNA的表达水平显著增强,MMP-1 mRNA的表达水平显著降低。结论补骨脂素具有促E S F-1细胞增殖的作用,可促进胶原蛋白合成,提示其具有潜在的抗皮肤衰老作用。
