红景天对慢性应激导致的抑郁大鼠体质量和摄取糖、水量的影响

目的：探讨红景天对慢性应激（chronic mild stress，CMS）导致的抑郁模型大鼠体质量和摄取糖、水量的影响。方法：70只雄性SD大鼠分为正常对照组（予0．5％羧甲基纤维素钠）、模型对照组、阴性对照模型组（予0．5％羧甲基纤维素钠）、阳性对照模型组（予氟西汀）和红景天低剂量、中剂量、高剂量模型组[分别予1．5、3、6g／（kg·d）红景天]。除正常对照组大鼠外，其余6组大鼠给予4周的慢性刺激制备抑郁模型。模型建立成功后，予相直的药物灌胃治疗．每周检测大鼠体质量、1％糖水摄取量和自来水摄取量。结果：经过4周慢性中等强度剌激后，与正常对照组大鼠相比，抑郁模型组大鼠的体质量以及1％糖水摄取量明显降低。灌服药物后．低剂量红景天组大鼠的体质量以及1％糖水摄取量恢复至正常对照组水平。结论：低剂量红景天能够促使抑郁大鼠恢复体质量和糖摄取量。     

Transition of pityriasis lichenoides et varioliformis acuta to febrile ulceronecrotic Mucha-Habermann disease is associated with elevated serum tumour necrosis factor-alpha

Febrile ulceronecrotic Mucha-Habermann disease (FUMHD) represents a fulminant and potentially lethal variant of pityriasis lichenoides. Only 24 cases have been described so far. We report a 9-year-old boy who initially presented with classical pityriasis lichenoides et varioliformis acuta (PLEVA) following a mild enteritis. Three weeks later, his skin lesions started to ulcerate progressively, involving > 90% of his body surface, accompanied by high fever, normal C-reactive protein, but highly elevated serum levels of tumour necrosis factor (TNF)-alpha. Methotrexate 10 mg m(-2) weekly was required to halt disease progression, while oral steroids (initial dose 2.8 mg kg(-1) daily) alone proved insufficient. Sequential histology revealed progressively dense perivascular and intramural lymphocytic inflammation as well as keratinocyte necrosis. Our case demonstrates the clinical and histological continuum between 'classical' PLEVA and FUMHD and points to the potentially pathogenic significance of TNF-alpha. We hypothesize that in future cases, treatment with TNF-alpha antagonists might represent a reasonable alternative to high-dose immunosuppressive therapy.     

Paraneoplastic pityriasis lichenoides in cutaneous lymphoma: case report and review of the literature on paraneoplastic reactions of the skin in lymphoma and leukaemia

Paraneoplastic dermatoses are non-neoplastic skin disorders which occur in the context of an underlying malignant neoplasm. The classic paraneoplastic dermatoses are mostly associated with solid internal malignancies. They only rarely occur in the context of nodal or primary cutaneous lymphomas. Apart from these classic paraneoplastic dermatoses, there are additional skin disorders reported to occur in close association with haematological and lymphoproliferative disorders which can thus be regarded as paraneoplastic manifestations. We report for the first time two patients with pityriasis lichenoides et varioliformis acuta in association with mycosis fungoides. In addition, we review the literature on paraneoplastic dermatoses of the skin which have been described in patients with leukaemias and primary cutaneous lymphomas.     

红景天对慢性应激导致的抑郁大鼠大脑海马5-羟色胺水平及其细胞增殖、分化和神经元数量的影响

目的：探讨中药红景天Rhodiola rosea对慢性应激导致的抑郁大鼠大脑海马5-羟色胺(5-HT)水平及其细胞增殖、分化和神经元数量的影响。方法：50只大鼠被分为正常对照组、模型组、阴性对照组、阳性对照组及红景天治疗组，每组各10只动物。除正常对照组外，给予其余4组大鼠为期4周的慢性应激，以建立抑郁症模型。在模型建立后，除模型组正常饲养外，其余4组大鼠分别灌服5%羧甲基纤维素钠、氟西汀、红景天，灌药周期均为3周。灌药结束后，采用高效液相色谱法检测海马组织5-HT水平，5-溴脱氧尿嘧啶 (BrdU)和β-微管蛋白Ⅲ(β-tubulin Ⅲ) 免疫荧光组化双标记染色检测海马神经干细胞的增殖和分化、采取形态计量学方法计数海马神经元。结果：与正常对照组比较，红景天治疗组的大脑海马5-HT水平、BrdU标记细胞数量、β-tubulin III和BrdU双标记细胞百分率以及神经元数量恢复性增加到正常对照组大鼠的水平。结论：红景天能够提高慢性应激导致的抑郁大鼠大脑海马5-HT水平，促进其海马神经干细胞增殖和分化，同时具有保护受损伤的海马神经元的作用。     

A case of pityriasis versicolor atrophicans

A case of pityriasis versicolor atrophicans caused by Malassezia globosa is reported in a 49-year-old woman. Diagnosis was based on direct microscopic examination and culture. Differential diagnosis was performed with respect to other skin diseases manifesting with cutaneous atrophy.     

Cell-mediated immunity to the mycelial phase of Malassezia spp. in patients with pityriasis versicolor and controls

BACKGROUND: Malassezia is the aetiological agent of pityriasis versicolor. The mycelial phase of the organism predominates in lesions of pityriasis versicolor. OBJECTIVES: To evaluate the cell-mediated immune (CMI) response to the mycelial phase of Malassezia in patients with this disease, which has not previously been studied. METHODS: The CMI status of 12 patients with pityriasis versicolor and 12 age- and sex-matched controls to mycelial antigen(s) of the organism was examined. The responses to the mycelial form of three strains of the organism were assessed using lymphocyte transformation and leucocyte migration inhibition assays. RESULTS: The transformation responses of the lymphocytes from both patients and controls gave transformation indices < or = 3, although the responses of lymphocytes from patients with pityriasis versicolor to the mycelial form of Malassezia strains were generally higher than those of the controls. In the leucocyte migration inhibition assay, leucocytes from patients with pityriasis versicolor and controls responded to the mycelial antigens of three different Malassezia strains; however, there was no significant difference in leucocyte response between patients with pityriasis versicolor and controls. CONCLUSIONS: Patients with pityriasis versicolor do not therefore have a CMI deficiency to Malassezia mycelial antigens but fail to generate a protective CMI response to mycelial antigens over and above that of control individuals during active disease.     

急性痘疮样苔藓样糠疹临床、病理及免疫组化分析

目的:探索急性痘疮样苔藓样糠疹(PLEVA)的病因,寻求有效治疗方法。方法:对我院12年中11例PLEVA患者的临床表现、组织病理、免疫组化及超微结构进行回顾性分析。结果:①本组临床表现为全身泛发出血性丘疹为主的多形性皮疹;②组织病理及超微结构:以淋巴细胞性血管炎,淋巴细胞、红细胞游入表皮为特征;③目前治疗以皮质类固醇激素、非甾体抗炎剂、环孢素较为有效。结论:环孢素可能是治疗重症PLEVA的有效药物。     

中药头皮脂溢搽剂治疗头皮脂溢性皮炎和头皮糠疹的临床疗效观察

目的观察中药头皮脂溢搽剂治疗头皮脂溢性皮炎和头皮糠疹的临床疗效。方法将符合诊断标准的160例头皮脂溢性皮炎和头皮糠疹患者随机分为治疗组和对照组，治疗组采用中药头皮脂溢搽剂，每日2次，外用，对照组使用2．5％硫化硒洗剂，1次／3d。两组均用药4周为1个疗程，计算疗效指数并记录不良反应。结果治疗组56例痊愈，14例显效，有效率87．5％，对照组50例痊愈，12例显效，有效率77．5％，治疗组的有效率优于对照组（P〈0．01）。两组均无明显不良反应。结论中药头皮脂溢搽剂治疗头皮脂溢性皮炎和头皮糠疹疗效明显，具有临床实用价值。     

重组海葵溶细胞素及平颏海蛇磷脂酶A2对血管外膜成纤维细胞增殖的影响

目的 观察重组海葵溶细胞素(rSrc)及平颏海蛇磷脂酶A₂(rPLA₂)对成纤维细胞增殖的影响。方法 体外培养成纤维细胞,应用不同浓度的rSrc和rPLA₂分别进行作用并设立对照进行比较,采用非放射性的MTS/PES法确定成纤维细胞的增殖状态。结果 各组细胞增殖率分别为:对照组0.840±0.061、rSrc 100 μg/ml组0.263±0.044、rSrc 10 μg/ml组0.418±0.054、rSrc 1 μg/ml组0.605±0.063、rSrc 100 ng/ml组0.772±0.054、rSrc 10 ng/ml组0.906±0.072、rPLA₂ 100 μg/ml组0.498±0.076、rPLA₂ 10 μg/ml组0.937±0.112、rPLA₂ 1 μg/ml组0.978±0.145。统计分析显示,低至1 μg/ml的rSrc仍能明显抑制大鼠成纤维细胞的增殖(P<0.01),并呈现剂量依赖性(P<0.05)。rPLA₂ 100 μg/ml组与对照组相比细胞增殖率有显著差异(P<0.05);rPLA₂ 10 μg/ml和rPLA₂ 1 μg/ml组与对照组相比均无显著差异(P>0.05)。结论 rSrc和rPLA₂分别对血管外膜成纤维细胞增殖有一定的抑制作用。