A Double-Blind, Placebo Controlled Clinical Trial Evaluating the Efficacy and Safety of a New Skin Whitening Combination in Patients with Chloasma

Melasma (or chloasma) is a hyperpigmentation disorder predominantly affecting sun-exposed skin in women, and is often refractory to treatment. The objective was to evaluate the efficacy and safety of a new whitening formula for the treatment of chloasma. This?single centre, double-blind, placebo controlled, bilateral (split-face) comparison, was conducted on 44 Chinese subjects with chloasma during the winter season. The test formula was applied twice a day, for 12 weeks on left side of the face and a placebo formula on the right side of the face. Assessments included the use of the hemi-MASI (split-face Melasma Area Severity Index), both ultraviolet and standard photography, together with clinical evaluations of efficacy and safety at T0, T6 and T12 weeks. A significant difference between the 2-hemi-MASI was noticed after 6 and 12 weeks of treatment. This result was confirmed by the clinical evaluation of the dermatologists who recorded a significant improvement in the half-face treated with the new whitening formula compared with that treated with placebo (p = 0.003). The tolerance of the new formula was recorded as excellent by 82% of subjects and found to be cosmetically appealing. In this study, the new whitening formula containing ferulic acid, Ginkgo Biloba, lipohydroxyacid (LHA), niacinamide and thermal spring water was safe and significantly improved chloasma after a 3-month-treatment period compared with placebo.

A study on the treatment of chloasma with moxibustion based on the theory of“Yang transforming Qi,and Yin shaping”

Background:“Yang Transforming Qi and Yin shaping”comes from“Plain Question Yin and Yang should be like the theory”.Chinese medicine believes that the imbalance of yin and yang is the cause of human diseases.One of the strengths of TCM in treating diseases is holistic regulation.The theory of“Yang transforming Qi,and Yin shaping”implies a strong holistic view.Chloasma,one of the common skin diseases,seriously affects the physical and mental health of patients due to its unclear etiology,difficult treatment and easy recurrence.The occurrence and development of chloasma are closely related to internal organs.This paper is based on the theory of internal meridian,“Yang transforming Qi,and Yin shaping”which attaches importance to the concept of“Yang Qi”,from a new understanding of the pathogenesis etiology of chloasma.Methods:The author believes that the incidence of the disease is the deficiency of Yang Qi,which can’t promote the movement of Qi and blood to nourish the face,resulting in tangible material condensation,so proposes that this disease needs to be promoted by Yang transforming Qi and warm to dissipate.Moxibustion belongs to the fire,and its warming effect can dissipate the tangible evil.Results:Combined with clinical practice and the theory of internal meridian,the author elaborated that moxibustion is one of the effective methods for treating chloasma,which provides a new way of thinking for the treatment of chloasma.Conclusion:“Yang Transforming Qi and Yin shaping”can be used to guide the treatment of chloasma.

MicroRNA-370-5p inhibits pigmentation and cell proliferation by downregulating mitogen-activated protein kinase kinase kinase 8 expression in sheep melanocytes

In mammals,microRNAs(miRNAs)play key roles in multiple biological processes by regulating the expression of target genes.Studies have found that the levels of miR-370-5p expression differ significantly in the skins of sheep with different hair colors;however,its function remains unclear.In this study,we investigated the roles of miR-370-5p in sheep melanocytes and found that the overexpression of miR-370-5p significantly inhibited cell proliferation(P<0.01),tyrosinase activity(P=0.001)and significantly reduced(P<0.001)melanin production.Functional prediction revealed that the 3′-untranslated region(UTR)of MAP3K8 has a putative miR-370-5p binding site,and the interaction between these two molecules was confirmed using luciferase reporter assays.In situ hybridization assays revealed that MAP3K8 is expressed in the cytoplasm of melanocytes.The results of quantitative RT-PCR and Western blotting analyses revealed that overexpression of miR-370-5p in melanocytes significantly inhibits(P<0.01)MAP3K8 expression via direct targeting of its 3′UTR.Inhibition of MAP3K8 expression by siRNA-MAP3K8 transfection induced a significant inhibition(P<0.01)of melanocyte proliferation and significant reduction(P<0.001)in melanin production,which is consistent with our observations for miR-370-5p.Target gene rescue experiments indicated that the expression of MAP3K8 in melanocytes co-transfected with miR-370-5p and MAP3K8-cDNA(containing sites for the targeted binding to miR-370-5p)was significantly rescued(P≤0.001),which subsequently promoted significant increases in cell proliferation(P<0.001)and melanin production(P<0.01).Collectively,these findings indicate that miR-370-5p plays a functional role in inhibiting sheep melanocyte proliferation and melanogenesis by downregulating the expression of MAP3K8.

Treatment of Gray Hair in Vitiligo Patients by Direct Melanocytes Transplant Using Needling Micrografting and Dermabrasion Techniques

Background: Melanocytes transplant for treatment of vitiligo is a common therapy using different surgical procedures. But there was no interest in repigmentation of grayness of hair in the treated vitiliginous area. Objective: To do melanocytes transplant from donor area into the recipient vitiliginous area with associated gray hair. Patient and Methods: This is a case interventional study was done in Department of Dermatology/Baghdad Teaching Hospital from February 2011-March 2012. Eleven patients were enrolled in this study, six males and five females with vitiligo in association of gray hair. Their ages ranged from 8 - 35 years with a mean ±SD of 20.90 ± 7.006. Melanocytes transplant in patients with vitiligo using needling micrografting technique for twelve patches and direct melanocytes transplant from normal donor area into vitiliginous recipient area by dermabrasion technique for eleven patches. Dressing was applied and patients were seen every two weeks for the first month and monthly for one year. Results: Repigmentation of the vitiliginous area was started after two weeks and was obvious at one month that progressed over time. The repigmentation of hair appeared usually after few months and was obvious after four months and the repigmentation of gray hair was quicker in patients with micrografting technique than those with dermabrasion technique. The mean rate of repigmentation was 18.3% at six months and 37.5% at twelve months in micrografting technique while the mean rate of repigmentation was 9.15% at six months and 18.55 at twelve months in dermabrasion technique. Conclusions: Direct transplant of melanocytes from normal donor area into recipient vitiliginous area with associated white hair is an effective procedure to induce repigmentation of gray hair.

人恶性黑色素瘤A375细胞黑素刺激素受体(MC1R)的检测

目的检测人恶性黑色素瘤A375细胞膜上MC1R蛋白及其cDNA,为研究黑色素瘤细胞表面受体及靶向配体奠定基础。方法利用放射配体分析法检测人恶性黑色素瘤A375细胞膜上的MC1R蛋白;用RTPCR方法扩增人恶性黑色素瘤A375细胞MC1R的cDNA,并克隆至pMD18T质粒,进行酶切分析鉴定及扩增片段DNA序列测定。结果放射配体分析结果表明,125IαMSH可与人恶性黑色素瘤A375细胞膜特异结合。RTPCR结果显示,扩增产物的大小与MC1R的cDNA相符。测序结果证实扩增片段为MC1R基因的特异片段。结论证实人恶性黑色素瘤A375细胞膜上表达MC1R蛋白。MC1R基因的成功克隆为其进一步研究提供了必要条件。

Direct Transplant of Melanocytes from Normal Donor Area into Vitiligenous Recipient Area by Intralesional Injection of Melanocytes Using Spade Like Needle Technique

Background: Vitiligo is a common autoimmune inflammatory skin disease, where there are different surgical techniques for treatment of stable patches of vitiligo .Objective: To find non-costly, minimally invasive, simple technique by direct melanocytes transplant by spade needle technique in treatment of vitiligo. Patients and Methods: This interventional, therapeutic, comparative study was done in Department of Dermatology, Baghdad Teaching Hospital, Baghdad, Iraq from April 2014-March 2015. Twenty patients with localized, generalized and segmental vitiligo were included. Full history and examination for each patient was done with 4 (20%) males and 16 (80%) females and their ages ranged from 9 - 40 (23.15 ± 11.44) years. Forty one patches in 20 patients treated by spade grafting technique and the donor and recipient sites were demarcated and anesthesia done by xylocaine 2% with adrenalin 1:100,000. Transplantation was started by using disposable needle gauge 18 (the sharp end of needle was cut by a scissor to make it a spade like) with medical syringe 5 ml supplied with normal saline. The micro-pieces were taken from donor site and transplanted directly, easily and rapidly into dermis of recipient site and followed by pushing normal saline and the procedure was repeated to cover all recipient sites with 5 mm distance between injection points. The surface area of the lesions was calculated and the reduction rate was estimated every month till the end of the 4th month period of the treatment. Results: Including 41 patches in 20 patients with the surface area of the patches ranged from 1.5 - 90 cm2 (13.78 ± 17.57) cm2. The mean ±SD of surface area of lesions was decreased from 13.78 ± 17.57 cm2 at baseline visit to 13.61 ± 17.48 cm2 at the second visit (after 2 weeks ) which was statistically significant (p value ≤ 0.001). The mean surface area continued to be reduced till reaching 12.20 ± 15.68 cm2 at the third visit and 12.01 ± 15.55 cm2 at the fourth visit. All were statistically significant when compared to baseline visit. There was reduction in surface area 1.1% at two weeks, 9.93%, and 12.5% at the 2nd, 4th months respectively. Conclusions: Intradermal injection of melanocytes in patients with vitiligo by spade like needle was very quick and simple non-costly technique, and gave 12.5% reduction which could be repeated at different times until satisfactory re-pigmentation of vitiligenous skin is achieved.

CHLOASMA TREATED MAINLY WITH FACIAL ACUPUNCTURE

63 cases of chloasma were divided into two groups, observation group facial acupuncture combined with auricular-plaster therapy of 43 cases and control group auricular-plaster therapy only of 23 cases. The resuls show that marked effective rate in observation group is higher than in control group (P<0. 005). In observation group, there is no distinct relationship between the course of disease and curative effect (P>0. 5), while there is marked difference between the course of treatment and curative effect, the longer the course of treatment, the better the curative effect(P<0. 05).

Depigmentory Effects of Keishibukuryogankayokuinin in Human Epidermal Melanocytes

Keishibukuryogankayokuinin (KBY) is a traditional Japanese herbal medicine widely used to treat skin pigmentation. The scientific basis for its use is, however, unclear, and studies evaluating its mechanism and effectiveness are sparse. In this study, we compared the tyrosinase inhibitory effects of KBY and Keishibukuryogan (KB, which has the same composition of KBY, except Coix Seed [CS]) and CS under exposure to UV radiation as well as under non-exposure conditions. Neonatal human epidermal melanocytes obtained from a darkly pigmented donor were used. These cells were cultured in a final concentration of 500 μg/ml or 1000 μg/ml, to which KBY, KB, and CS were added. After incubation for 72 h, cells were stained with Fontana-Masson stain and counted. Tyrosinase activity was measured by its dopa oxidase activity, and tyrosinase expression was estimated using real-time PCR. For UV radiation, cells were exposed to UVB radiation for 90 s per day for 3 days. Under non-exposure conditions, tyrosinase activity significantly increased with both KBY and KB but significantly decreased with CS, regardless of the concentration. In addition, tyrosinase expression significantly decreased but only with KBY at both concentrations. Under UV radiation exposure, tyrosinase activity significantly increased with KBY and KB at both concentrations while tyrosinase expression significantly decreased with KBY and KB;a significant increase was, however, observed with CS at both concentrations. These results suggest that taking KBY after sunburn is effective against skin pigmentation, and the combination of KB and CS is useful for skin depigmentation.

Direct Melanocytes Transplant from Normal Donor Area into Vitiliginous Recipient Area by Dermabrasion Technique

Background: Vitiligo is an autoimmune pigmentory disorder, that affects all age group that is treated by many medical treatments but some of them might need surgical therapy. Objective: To evaluate the dermabrasion technique in the treatment of vitiligo by direct transfer of melanocytes from the dermabraded normal donor area to the vitiliginous recipient area. Patients and Methods: This is a case interventional study was done in Department of Dermatology/Baghdad Teaching Hospital from February 2011-March 2012. Nine Patients with vitiligo were enrolled in this study with different clinical types of vitiligo including 5 segmental, 2 generalized and 2 localized. The donor and recipient areas were anesthetized at the same time with xylocain alone. Dermabrasion of recipient area was done first by manual abrader and left for few minutes until the oozing was stopped. Then the donor area was similarly dermabraded and the dermabraded tissue including the epidermis and superficial epidermis was immediately transferred into the recipient area and dressing was applied. Removal of the dressing was done after 10 - 14 days from the operative time. Follow up was done every 2 weeks in the first month then monthly for six months to record the result of implantation and repigmentation. Results: The re-pigmentation started one month after the operation as small macules and this increased gradually over time: the mean rate of re-pigmentation was 13% at 2 months, 27.8% at 4 months and 36.78% at 6 months. In addition, sun light exposure was applied to enhance re-pigmentation. The pigmentation was diffuse and not follicular in shape. Conclusion: Direct transfer of melanocytes from normal donor area into vitiliginous recipient area by dermabrasion technique was easy, rapid and non-costly and gave 36.78% mean rate of pigmentation at 6 months follow up and without complications.

Etiological analysis of chloasma from view of Western and Chinese traditional medicine

Chloasma is a common and refractory skin disease,which is a discosmetic dermatosis in which pigment is deposited on the face,cheeks,forehead and other parts due to the pigment metabolism disorder.It is manifested as facial yellow-brown patches,with different shades,different shapes,and often symmetrically distributed.The prevalence rate of chloasma is still increasing year by year,which reflects the physical and mental health of women.Because the cause of disease is unknown,and at present there is no uniform treatment.This paper discusses the etiology of chloasma from modern medicine and traditional Chinese medicine to provide reference for clinical therapy.

激光美容相关常见疾病诊疗指南(2024版)

激光美容是指通过对人体皮肤或皮下组织实施合适剂量的激光/强脉冲光、射频、超声等治疗,以达到去除皮肤病灶,改善外观及状况的目的。近30年来,随着光、电、声等物理技术的发展,激光美容领域研究成果很大程度上解决了临床疾病的治疗问题和美容的基本需求,但至今尚缺乏完整而系统的、基于较高等级证据的临床指南,以指导临床从业人员规范化的诊疗实践。该指南结合国内外相关的高证据等级文献和激光治疗专家共识/指南,组织国内激光美容各疾病领域专家共同参与制定,旨在为相关常见疾病的进一步规范诊疗提供参考。指南涵盖了以下常见皮肤病变:黄褐斑、颧部褐青色痣、太田痣、雀斑、雀斑样痣、咖啡牛奶斑、贝克尔痣、黑眼圈、文身、炎症后色素沉着、色素脱失与减退、黑色素痣、汗管瘤、睑黄瘤、疣状表皮痣、增生性瘢痕、瘢痕疙瘩、痤疮瘢痕、膨胀纹、毛孔粗大、毛细血管扩张、葡萄酒色斑、面部静态细纹、面部松弛、非侵入性减脂、脱毛。指南主要内容包括疾病病因和临床表现、治疗可选光电技术、推荐光电设备和参数以及激光优选方案。

Fifty Cases of Chloasma Treated by Acupuncture plus Intensive Pulse Light Irradiation

Objective: To observe the clinical therapeutic effect of acupuncture plus intensive pulse light irradiation on chloasma. Methods: Ninety-six cases of chloasma were randomly divided into two groups, the control group of 46 cases treated by simple acupuncture and the treatment group of 50 cases treated by acupuncture and intensive pulse light irradiation. Results: The total effective rate was 89.1% and 98.0% in the control group and treatment group respectively, with a significant difference between the two groups (P<0.05). Conclusion: For chloasma, the effect of treatment with acupuncture plus intensive pulse light irradiation is superior to that with simple acupuncture.

Effect of Xiaobailing Decoction on Melanocytes in Vitro

To observe the effect of Xiaobailing Decoction （消白灵汤） on murine melanocytes in vitro and to explore the mechanism of Xiaobailing Decoction in the treatment of vitiligo. Methods： B-16F10 murine melanoma cells were cultured in 1640 medium and treated respectively with different concentrations （lmg/ml, 2mg/ml, 3mg/ml） of the Chinese drug Xiaobailing Decoction and its main components, the drugs for replenishing the lddney-yang, and the drugs for nourishing blood and activating blood circulation, etc. for 7 days. MMT assay was used to determine the proliferation of B-16F10 murine melanoma cells. NaOH cleavage assay was adopted to measure the melanogenesis of melanocytes. Results：Xiaobailing Decoction, the drugs for replenishing the kidney-yang and the drugs for nourishing blood and activating blood circulation at different concentrations significantly improved the proliferation of B-16F10 murine melanoma cells from the 3rd day to the 5th day （P〈0.05）, with Xiaobailing Decoction at the concentrations of lmg/ml having the most distinct action on promoting the proliferation of melanocytes on the 3rd day （P〈0.001）; And the drugs for replenishing the lodney-yang at the concentrations of 2mg/ml and 3mg/ml and the drugs for nourishing blood and activating blood circulation at 3mg/ml significantly increased melanogenesis of melanocytes （P〈0.05）. Conclusion： Xiaobailing Decoction can promote melanocytic proliferation and melanogenesis in vitro, and it is indicated that the drugs for replenishing the kidney-yang and the drugs for nourishing blood and activating blood circulation play an important role in treating vitiligo.

基于网络药理学和实验验证分析逍遥散治疗黄褐斑作用机制研究

目的基于网络药理学技术及实验验证分析逍遥散治疗黄褐斑的作用机制。方法应用TCMSP等数据库和相关的文献资料,检索逍遥散的生物活性成分及相关作用靶点,构建逍遥散的药物-有效成分-作用靶点网络。基于Drugbank和Genecards等数据库建立与黄褐斑相关的疾病靶点,与逍遥散的有效成分靶点匹配获得潜在治疗靶点。根据Metascape数据库和DAVID数据库对潜在的治疗靶点进行GO生物过程、KEGG信号通路和蛋白质-蛋白质相互作用(PPI)分析,PPI网络的拓扑分析用Cytoscape软件进行。并用实验验证上述结果。结果逍遥散中有效化学成分有928种,包括白芍85种,白术55种,柴胡349种,当归125种,茯苓34种,甘草280种,有效成分作用靶点基因155个。在药物-有效成分-靶点网络内重要性前10的有效成分中,来源自柴胡4种,白芍3种,白术1种,甘草2种。共收集到49个黄褐斑相关疾病靶点,其中有24个是逍遥散治疗黄褐斑的潜在靶点基因。KEGG富集分析表明,在全部的20调信号通路中得到10条较为靠前的信号通路。GO功能富集分析显示,前10个生物过程包括分子调节功能、磷酸化等;前10个分子功能包括细胞传递部分、生物膜等;前10个细胞定位包括核苷酸、嘌呤核苷酸等。PPI网络经提取后获得了包含36个节点的核心网络,其中HSP90AA1、HSP90AB1、NTRK1、CUL3、APP、EGFR、TP53、UBC、MCM2、PRKACA基因是核心靶点。实验验证表明,逍遥散可显著改善大鼠黄褐斑情况;能升高血清SOD水平,降低血清Tyr和MDA含量;改善黄褐斑处皮肤组织结构和皮肤HMB45表达情况。结论逍遥散可通过多成分、多靶点和多通路治疗黄褐斑,起治疗作用的有效成分主要来源自柴胡、白芍、白术和甘草,而核心靶点主要有HSP90AA1等基因。

THE EFFECT OF Ge-132 ON ULTRASTRUCTURE OF CULTURED MELANOCYTES

Objective To elucidate the effect of Ge 132 on the growth of melanocytes.Methods Melanocyes from epidermis were cultured and purified;the second generation of the cell was used for study;the cells were divided into two groups randomly,to group A, Ge 132 was added to the media at 0.04mg/L;to group B,common culturing method was used without Ge 132.After 5d, the cells were seperated by digestion for study by transmission electronic microscope.Results Compared to group B, the vaculoes of the cells were increased,mitochondria distended, endoplasmic reticulum dilated and the number of melanosome declined in the group A.Conclusion Ge 132 can inhibit the melanocytes growth at a certain concentration and might be used for treating pigmented diseases.

Ultrastructure of Amelanotic Melanocytes from Human Hair Follicles

To investigate the ultra structure of amelanotic melanocytes （AMMC）. Methods： The hair follicles obtained from normal human scalp by 0.50% collagenase type V treatment were washed with 0.1 mol/L phosphate buffer salt （PBS）. Hair-follicle cell suspensions were prepared by trypsin treatment and cultured in melanocyte medium. Remaining keratinocytes were removed by differential trypsinization. 100μg/ml geneticin was used to eliminate the contaminating fibroblasts. At third passage, the cells were trypsinized, and then washed in phosphate-buffered saline and processed for transmission electron microscopy. Results： Under transmission electron microscope, the cultured cells showed round or oval shape, with single large nuclear and the karyotheca were double deck. There were obvious euchromosome within the nucleus, and sparse heterochromosome. There were various organelles in the cytoplasm, including plentiful melanosomes with nearly similar size, mitochondria, rough endoplasmic reticule （RER） and ribosome. The electron density granules in most of the melanosomes disposed along concentric circularities. Golgi apparatus in the cells was inconspicuous. Conclusion： The ultra structure of AMMC from human hair follicles is different from that of epidermal melanocytes, and these characteristics determine the functional immature of AMMC.

氨甲环酸非止血功效的研究进展

为氨甲环酸临床应用的拓宽和创新提供参考。检索中国知网、Web of Science、PubMed等数据库中近5年来与氨甲环酸非止血用途相关的文献,对氨甲环酸的功效、作用机制进行综述,并对其创新应用进行了讨论和展望。氨甲环酸由于其分子结构和抗纤溶作用,衍生出诸多功效,除了止血之外,还具有保护线粒体、抗菌、抗病毒、抗癌、延缓衰老、美白,治疗痤疮、玫瑰痤疮、黄褐斑、银屑病、炎症后色素沉着等功效。氨甲环酸在衰老、感染、癌症、皮肤等疾病的预防和治疗,以及医美项目中的应用具有巨大潜力,创新制剂和氨甲环酸衍生物的研发更有利于氨甲环酸功效的发挥。

山羊AGRP基因克隆及在黑色素细胞中的表达研究

为了研究刺鼠相关蛋白(agouti-related protein,AGRP)基因在动物皮肤黑色素沉积中的作用,试验以酉州乌羊为研究对象,利用TRIzol法提取皮肤组织RNA,通过RT-PCR扩增AGRP基因编码区(coding region,CDS)序列,采用生物信息学软件预测AGRP蛋白质结构和功能,构建系统进化树分析山羊与其他哺乳动物AGRP基因的保守性;体外培养黑色素细胞,利用实时荧光定量PCR检测AGRP基因在细胞增殖和分化阶段不同时间点的相对表达量。结果表明:酉州乌羊AGRP基因CDS序列长度为405 bp,编码135个氨基酸,编码蛋白质分子量为14871.36 u,理论等电点为5.70;AGRP蛋白二级结构由3个α-螺旋和1个β-折叠以αααβ的顺序组成;AGRP蛋白的氨基酸序列在不同物种间高度相似;在构建的系统进化树中,酉州乌羊与绵羊和山羊的亲缘关系最近,与小鼠和人的亲缘关系最远。AGRP基因在黑色素细胞增殖和分化阶段的不同时间点均有表达,随着细胞培养时间的延长,AGRP基因的相对表达量在增殖阶段先逐渐降低再升高,在分化阶段逐渐升高,与0小时比较均差异极显著(P<0.01)。说明AGRP基因在黑色素细胞中具有时空特异性,在黑色素沉积过程中发挥重要作用。

自体细胞移植治疗稳定期白癜风疗效的Meta分析

目的 系统评价培养与非培养自体黑色素细胞移植及联合其他方法治疗稳定期白癜风的疗效。方法检索PubMed、Embase、Web of Science、The Cochrane Library、中国期刊全文数据库(CNKI)、维普中文科技期刊全文数据库(VIP)、万方数据库,纳入研究为自体细胞移植治疗稳定期白癜风的临床研究。计数资料以合并后相对危险度(RR)值为效应指标,用Revman5.4软件对符合分析的研究进行Meta分析。结果 最终纳入文献14篇,Meta分析显示:自体培养黑色素细胞移植(CMT)与黑色素细胞+角质细胞、CMT与自体非培养混悬液移植(NCES)治疗稳定期白癜风疗效差异无统计学意义(P>0.05);CMT与CMT+光疗治疗稳定期白癜风疗效差异有统计学意义(P<0.01);NCES与NCES+其他成分、NCES与NCES+其他疗法、NCES与NCES+光疗治疗稳定期白癜风疗效差异无统计学意义(P>0.05);细胞移植与细胞移植+其他疗法、细胞移植与细胞移植+光疗、细胞移植与细胞移植+窄谱中波紫外线(NBUVB)治疗稳定期白癜风疗效差异有统计学意义(P<0.01)。结论 NCES和CMT移植治疗稳定期白癜风都有较好的疗效,与混悬液中所含成分无直接关系。黑色素细胞移植联合其他治疗方式治疗白癜风疗效要优于单一用黑色素细胞移植治疗白癜风。受纳入研究数量和质量限制,上述结论有待更多设计合理的随机对照临床研究证实。

白芍总苷对H_(2)O_(2)诱导下黑色素细胞的保护及作用机制

为了探究白芍总苷治疗白癜风的潜在作用机理,对人正常黑色素细胞PIG1进行体外培养,用不同浓度的白芍总苷对细胞进行预处理并施加H_(2)O_(2)刺激,用CCK-8法检测细胞活力,用流式细胞术检测细胞凋亡和活性氧的产生,用蛋白免疫印迹法检测细胞色素c、cleaved caspase-3、cleaved caspase-9含量以及MAPK家族成员p38及其磷酸化的表达.结果显示:①白芍总苷可有效抑制H_(2)O_(2)诱导的PIG1细胞毒性,且呈剂量依赖性;②白芍总苷减少了H_(2)O_(2)诱导的细胞活性氧的产生和细胞色素c的释放,下调了cleaved caspase-3和cleaved caspase-9的激活;③白芍总苷有效阻碍了H_(2)O_(2)诱导的p38 MAPK磷酸化.上述结果表明,白芍总苷可作为一种有效的抗氧化剂,保护黑色素细胞免受H_(2)O_(2)诱导的氧化应激损伤.