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1.
目的探讨308 nm准分子光治疗掌跖脓疱病(palmoplantar pustulosis, PPP)的有效性及安全性。方法采用前瞻性随机单盲临床试验的方法,收集2019年10月—2020年10月就诊于上海市皮肤病医院的PPP患者共73例,随机分为3组: 低剂量组以2倍最小红斑量(minimal erythema dose, MED)为起始剂量、中剂量组(以4倍MED为起始剂量)和高剂量组(以6倍MED为起始剂量)。各组均接受每周3次308 nm准分子光治疗,持续12周。分别评估治疗第0、2、4、6、8、12周时掌跖银屑病面积和严重程度指数(palmoplantar pustular psoriasis area and severity index, pp-PASI)和皮肤病学生活质量指数(dermatology life quality index, DLQI)评分,并记录不良事件和不良反应的发生情况。结果3组治疗结束时均获得良好疗效。高剂量组pp-PASI降低(26.92±4.90)较中、低剂量组pp-PASI降低更为显著(21.05±4.48,17.31±5.38),差异有统计学意义(P均<0.01)。各组患者DLQI评分均有改善,高、中剂量组DLQI评分改善快于低剂量组。高剂量组不良反应发生率较高(12/24,50%)。结论308 nm准分子光治疗掌跖脓疱病可获得较好的疗效,其中以6倍MED为起始剂量,每次治疗较前一次递增20%可较快达到满意疗效,减轻病情严重程度,提高患者生活质量。同时,应注意可能发生的不良反应,在选择剂量前对皮肤厚度及皮肤类型进行评估。  相似文献   
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碳点是一种具有优异荧光性质的新兴纳米材料。相比于传统的有机染料和半导体量子点,碳点具有毒性低和生物相容性好等优点。目前,碳点在分析检测、荧光成像、药物运载等诸多领域有着广泛的应用。鹿茸是一味具有多种药效的传统名贵中药,也是罕见的具备再生能力的哺乳动物器官。鹿茸的生物学特性和药效与其化学成分有着密切联系。简要综述了碳点在荧光检测、荧光成像以及光诊疗方面的应用进展,对碳点应用于鹿茸生物学特性及其化学成分分析研究的可行性进行了探讨。  相似文献   
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Phototherapy is the most commonly used modality for repigmenting vitiligo. Currently, UVB emitting devices, including narrow-band UVB (NBUVB) and excimer laser/light, are considered as the treatment of choice. While emitting wavelengths at close proximity, excimer lights emit higher irradiance (HI; W/m2) compared to NBUVB. Clinical reports have shown that excimer light is more efficacious in treating vitiligo compared to NBUVB, and we demonstrated that irradiance plays a critical role in promoting melanoblasts differentiation. UVB radiation from the sun is closely associated with photocarcinogenesis of the skin. Sunscreens were used to protect the skin by reducing UVB irradiance (low irradiance (LI) UVB). Sunscreen use was associated with skin cancer reduction in clinical trials. Paradoxically, sunscreen use was associated with increased sunburn episodes in the real-world settings. It was shown that UVB-induced sunburn depends on fluence (J/m2) but not irradiance of UVB radiation. We investigated the significance of irradiance in the context of UVB-induced carcinogenesis of the skin. For mice receiving equivalent fluence of UVB exposure, the LIUVB-treated mice showed earlier tumor development, larger tumor burden, and more epidermal keratinocytes harboring mutant p53 as compared to their HIUVB-treated counterparts. These results suggested that at equivalent fluence, LIUVB radiation has more photocarcinogenic potential on the skin compared to its HI counterpart. Since development of sunburn with or without sunscreen use indicates that certain threshold of UVB fluence has been received by the skin at LI and HI, respectively, sunburn episodes with sunscreen use (LIUVB) are more damaging to the skin compared to that without sunscreen (HIUVB) application. In summary, since irradiance plays an important role determining the biological effects of UVB radiation on the skin, future related studies should take this critical parameter into consideration.  相似文献   
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Vitiligo is quite a common hypopigmentary disorder, which may affect both children and adults with important psychological effects due to the well‐known leopard skin‐like appearance. The authors summarize in the present study the published evidence on vitiligo with particular interest on the controversial aspects of the disease, such as its definition and the available treatments.  相似文献   
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Localized phototherapy including topical psoralen plus ultraviolet A (PUVA) and targeted ultraviolet B (UVB), and photodynamic therapy (PDT) have been increasingly used in the treatment of localized psoriasis. Yet, there are no systematic reviews or meta‐analyses that scientifically evaluated the pooled efficacy of these treatments in psoriasis. We searched Medline, Embase, and Cochrane databases during the period of January 1980 to June 2012. Our systematic search resulted in 765 studies, 23 of them were included in the review. The primary outcome was 75% reduction in severity score from baseline. A meta‐analysis using random effect model found topical PUVA to be more effective than non‐laser targeted UVB [odds ratio: 3.48 (95% confidence interval 0.56–21.84), P = 0.183]. The pooled effect estimate of the efficacy (75% reduction in severity score) of topical PUVA, targeted UVB, and PDT were as follows: 77% (topical PUVA), 61% (targeted UVB), and 22% (PDT). Topical PUVA and targeted UVB phototherapy are very effective in the treatment of localized psoriasis. Topical PUVA seems more effective than non‐laser targeted UVB phototherapy. On the other hand, PDT has low efficacy and high percentage of side effects in treating localized psoriasis.  相似文献   
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