首页> 外文期刊>Photodermatology, photoimmunology and photomedicine >Single administration of lesion-limited high-dose (TURBO) ultraviolet B using the excimer laser: clinical clearing in association with apoptosis of epidermal and dermal T cell subsets in psoriasis.
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Single administration of lesion-limited high-dose (TURBO) ultraviolet B using the excimer laser: clinical clearing in association with apoptosis of epidermal and dermal T cell subsets in psoriasis.

机译:使用准分子激光单次施用病灶受限的大剂量(TURBO)紫外线B:银屑病中与表皮和真皮T细胞亚群凋亡相关的临床清除。

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摘要

Development of effective therapy for psoriasis is confounded by numerous factors contributing to disease pathogenesis, including pathogenic immunocytes which appear to drive epidermal keratinocyte hyperproliferation. Our objective was to study clinical and biomarker effects of a single dose of TURBO laser UVB (308 nm) applied directly to psoriatic plaques.Eighteen patients with chronic plaque psoriasis received a single dose of 10 minimal erythema dose (MED) UVB and were followed for 8 weeks. Keratome and punch biopsies were assessed for T cell depletion and apoptosis following a single 308-nm dose of UVB.Patients demonstrated clinical improvement as indicated by decreased global Psoriasis Area and Severity Index scores and reduced numbers of pathogenic memory/effector T cells infiltrating lesional epidermis and dermis. Consistent with apoptosis induction, caspase activation increased in lesional T cells after treatment.We conclude that a single 10 MED dose of TURBO UVB is effective at reducing the severity and extent of psoriatic lesions. We hypothesize that the reason a single treatment is sufficient to clear a psoriatic plaque is that the 10 MED dose is able to deliver sufficient photons to a microanatomic area of the lesion where susceptible pathogenic T cell mechanisms are operative.
机译:牛皮癣有效治疗方法的开发受到许多导致疾病发病机理的因素的困扰,包括致使表皮角质形成细胞过度增殖的致病性免疫细胞。我们的目标是研究直接将单剂量TURBO激光UVB(308 nm)直接应用于银屑病斑块的临床和生物标志物作用.18例慢性斑块状牛皮癣患者接受单剂量10最小红斑剂量(MED)UVB的治疗,并随访8个星期。在单次308 nm剂量的UVB后评估了角膜刀和穿孔器活检的T细胞耗竭和凋亡。患者表现出临床改善,表现为全球银屑病面积和严重性指数降低,病原性记忆/效应T细胞浸润病变表皮数量减少。和真皮。与凋亡诱导一致,治疗后病灶T细胞中胱天蛋白酶激活增加。我们得出结论,单剂量10 MED剂量的TURBO UVB可有效减少银屑病病变的严重程度和程度。我们假设单一治疗足以清除牛皮癣斑块的原因是10 MED剂量能够将足够的光子传递至病变的微解剖区域,在该区域中可操作的致病性T细胞机制起作用。

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