蕈样肉芽肿bcl—2蛋白表达的研究

目的 探讨ｂｃｌ－２蛋白在蕈样肉芽肿（ＭＦ）中的表达及其意义,方法 对１３例ＭＦｂｃｌ－２蛋白的表达进行了免疫组织化学检测,结果 ８例肿瘤细胞表达ｂｃｌ－２（＋～２＋）不同临床分期的ＭＦｂｃｌ－２蛋白阳性率之宰无显著性差异（Ｐ均〉０．０５）肿瘤细胞ｂｃｌ－２蛋白表达强度与ＭＦ临床分期不相关（Ｐ均〈０．０５）。结论 提示ｂｃｌ－２蛋白表达与ＭＦ的发生有关。     

尖锐湿疣p53及Bcl-2蛋白表达的研究

尖锐湿疣（ＣＡ）发病中的细胞增生机制至今未明了。我们研究了ＣＡ中ｐ５３及Ｂｃｌ２两种蛋白的表达,试图从细胞凋亡角度探讨其发生机制。１一般资料实验组共３１例（男性２２例,女性９例）。年龄２０～５５岁,发病后均未用药物治疗。电灼手术时取组织活检。对照组为１０名健康男性手术切除的包皮。按病理活检常规处理标本。２实验方法：超薄切片,贴于ＡＰＥＳ预处理玻片,６０℃烘烤２ｈ,常规脱蜡,在枸橼酸缓冲液中置微波炉加热１０ｍｉｎ。按ＬＳＡＢ法常规染色。第一抗稀释度分别为ｐ５３１∶８０,Ｂｃｌ２１∶５０（均为Ｄ…     

蕈样肉芽肿皮损p55及p75肿瘤坏死因子受体表达

ｐ５５及ｐ７５肿瘤坏死因子受体分布于角朊细胞、淋巴细胞、中性粒细胞及某些肿瘤细胞表面,介导肿瘤坏死因子多种生物学效应［１,２］。为了探讨其在蕈样肉芽肿（ＭＦ）皮损中的表达及意义,我们对９例ＭＦ皮损进行了免疫组化检测。资料和方法１．病例９例ＭＦ中男８例...     

大疱性蕈样肉芽肿和色素异常性蕈样肉芽肿

阐述大疱性蕈样肉芽肿和色素异常性蕈样肉芽肿的临床表现、组织病理变化和鉴别诊断。     

蕈样肉芽肿患者外周血淋巴细胞HLA-DR抗原表达的研究

目的探讨蕈样肉芽肿（ＭＦ）患者外周血淋巴细胞的ＨＬＡ ＤＲ抗原表达及其意义。方法应用流式细胞术及免疫双荧光染色法,共检测１０例ＭＦ。结果ＭＦ患者外周血ＨＬＡ ＤＲ＋淋巴细胞数及ＣＤ＋３ ＨＬＡ ＤＲ＋淋巴细胞数与正常对照的差异均有显著性意义（Ｐ分别＜０．０１,＜０．００１）,ＨＬＡ ＤＲ＋淋巴细胞数及ＣＤ＋３ ＨＬＡ ＤＲ＋淋巴细胞数与疾病临床分期均呈显著正相关（ｒ值分别为０．７９６、０．７６７,Ｐ均＜０．０１）。ＣＤ＋４ ＨＬＡ ＤＲ＋Ｔ细胞、ＣＤ＋８ ＨＬＡ ＤＲ＋Ｔ细胞均高于正常对照,差异非常显著（Ｐ分别＜０．０５、＜０．００１）。结论ＭＦ患者外周血淋巴细胞ＨＬＡ ＤＲ抗原表达普遍存在异常,与ＭＦ的发病密切相关。     

免疫组织化学技术在蕈样肉芽肿诊断中的研究进展

蕈样肉芽肿（MF）是最常见的皮肤T细胞淋巴瘤。在疾病早期,皮损往往呈多形性,临床与病理变化缺乏特征性,难以与良性炎症性皮肤病鉴别。免疫组化技术对MF的确定诊断有一定的帮助。     

具有多种表现的蕈样肉芽肿1例

报告1例具有多种表现的蕈样肉芽肿。患者男,48岁。全身皮肤出现红斑、脱屑,并伴进行性皮肤松弛,四肢有斑块、破溃8年,秃发6个月。体格检查发现全身皮肤红斑,上覆大片状鳞屑和结痂;颈部两侧可见表皮松弛;四肢皮肤呈暗红色浸润的松弛性斑块和深在的溃疡;枕部头皮呈条片状胶质样秃发斑;颈项部、双上肢及胸部群集表面光亮的肤色丘疹和结节：左腹股沟可触及数个增大的淋巴结。诊断为蕈样肉芽肿,同时具有蕈样肉芽肿的多种表现：鱼鳞病样蕈样肉芽肿、肉芽肿性皮肤松弛症或肉芽肿性蕈样肉芽肿、毛囊性蕈样肉芽肿。     

P53 PCNA K-i67 bcl-2在尖锐湿疣中的表达

目的　探讨尖锐湿疣 (CA)中P5 3、Ki 6 7、bcl 2、增殖细胞核抗原 (PCNA)表达与人乳头瘤病毒 (HPV )感染的关系。方法　用免疫组化方法对 40例CA和 10例正常包皮进行检测。结果　 40例CA中P5 3、Ki 6 7、bcl 2、PCNA阳性标本分别为 33例 ( 82 .5 % )、37例 ( 92 .5 % )、2 0例 ( 5 0 .0 % )、35例 ( 87.5 % )。CA组各种蛋白的表达强度均明显高于对照组 (P <0 .0 5 )。HPV感染的空泡细胞核中同时有P5 3、Ki 6 7、PCNA过度表达者 2 5例。P5 3、bcl 2阳性细胞多分布于基底层、棘细胞中下层。结论　CA中存在P5 3、Ki 6 7、PCNA、bcl 2过度表达 ,提示角质形成细胞异常增生与HPV感染有关。     

The effects of calcipotriol and methylprednisolone aseponate on bcl-2, p53 and ki-67 expression in psoriasis

OBJECTIVE: The decrease of physiological apoptosis in the psoriatic lesions is thought to be involved in the pathogenesis of psoriasis, and induction of apoptosis was shown to contribute to the regression of psoriatic hyperplasia. In the present study, we compared the effects of calcipotriol and methylprednisolone aseponate (MPA) treatments on bcl-2, p53 and ki-67 expressions in psoriatic patients in order to define a relationship between regulation of apoptosis and healing process in psoriasis. METHODS: Thirty psoriatic patients with stable and moderate chronic plaque psoriasis applied either calcipotriol or MPA ointment for 6 weeks twice daily. Evaluation of bcl-2, p53 and ki-67 positivity was performed at baseline and was repeated at sixth week for each therapy. RESULTS: The mean percentage of positive keratinocytes was 8.63 +/- 7.15% for p53, 20.66 +/- 14.45% for ki-67, and 3.74 +/- 2.83% for bcl-2 in psoriatic skin at baseline. Normal skin values were 3.27 +/- 3.21% for p53, 4.93 +/- 4.77% for ki-67, and 1.80 +/- 0.41% for bcl-2. The psoriatic skin showed higher ki-67 (P < 0.05) and bcl-2 (P < 0.05) expression rates when compared to normal skin. The p53 positivity observed in psoriatic skin and normal skin was not significantly different (P > 0.05). Following calcipotriol and MPA treatments, there was a significant reduction in p53 and ki-67 positivity accompanied by an increase in bcl-2 positivity (P < 0.05 each). No significant differences were found at sixth week between calcipotriol and MPA groups with respect to p53, ki-67 and bcl-2 positivity (P > 0.05). The post-treatment psoriatic skin showed lower expression of p53, higher expressions of ki-67 and bcl-2 when compared to normal skin (P < 0.05 each). CONCLUSION: The results of this study provide evidence that both calcipotriol and MPA decrease the p53 and ki-67 expression and increase bcl-2 expression. However, it should further be elucidated if these changes were the common behaviour of psoriatic keratinocytes to any antipsoriatic medication.     

Bcl-2、p53在扁平苔藓病变组织中的表达

为了探讨扁平苔藓的发病机理,采用标记抗链菌卵蛋白生物素（ＬＳＡＢ）的方法,检测了３５例扁平苔藓Ｂｃｌ２和ｐ５３蛋白的表达。结果发现,在扁平苔藓组织中Ｂｃｌ２和ｐ５３蛋白有广泛的表达（分别为８５７１％和６０％）,Ｂｃｌ２阳性表达率和强度均高于ｐ５３（两者Ｐ＜００５）,并呈平行关系（Ｐ＜００５）。提示Ｂｃｌ２和ｐ５３可能是协同参与扁平苔藓病变的重要因素。     

凋亡相关基因C-myc,bcl-2,p53在小儿血管瘤中的作用研究

目的探讨凋亡相关基因C-myc,bcl-2,p53与血管瘤增生、消退的关系。方法采用免疫组化SP法检测31例增生期血管瘤、35例消退期血管瘤组织中Cmyc,bcl2和P53蛋白。结果Cmyc在增生期血管瘤中的阳性率为80.65%,而在消退期血管瘤组织中均呈阳性,两组之间差异显著(P<0.01)。bcl2在增生期血管瘤中的阳性率为83.87%,明显高于消退期血管瘤45.71%(P<0.01)。P53蛋白主要定位于血管瘤中的肥大细胞。增生期血管瘤中P53着色的肥大细胞数31.18±9.08/HPF明显高于消退期血管瘤14.05±6.42/HPF(P<0.01)。结论凋亡相关基因Cmyc,bcl2,p53与小儿血管瘤增生、消退密切相关,且在血管瘤增生、消退的不同时期作用不同。     

Association of p53 Arg72Pro polymorphism and beta-catenin accumulation in mycosis fungoides

BACKGROUND: Aberrant activation of beta-catenin contributes to the onset of a variety of tumours. There are many tumours that display beta-catenin accumulation in the absence of mutations in its gene. Recently, abnormal accumulation of wild-type beta-catenin has been associated with mutational inactivation of the p53 tumour suppressor. OBJECTIVES: To investigate the potential role of p53 and its homologue p63 in beta-catenin deregulation and to correlate this with disease outcome. METHODS: We analysed a panel of 24 samples of mycosis fungoides (MF), the most frequent manifestation of cutaneous T-cell lymphoma (CTCL), for beta-catenin, p53 and p63 protein expression by immunohistochemistry. Based on the immunostaining results for beta-catenin protein, 11 positive cases were selected for laser microdissection, genomic DNA isolation and subsequent mutation analysis of beta-catenin exon 3 and p53 exons 4-8. RESULTS: Our findings revealed overexpression of beta-catenin, p53 and p63 in 46%, 38% and 17% of cases, respectively. The number of p53-positive cases of MF was significantly higher (P < 0.05) in the beta-catenin-positive group (73%). Sequence analysis demonstrated that wild-type beta-catenin accumulation in MF is not associated with mutational inactivation of the p53 gene and, more importantly, our data provide evidence that a common polymorphic form of p53 (Arg72Pro) is significantly associated with beta-catenin overexpression (P < 0.05). No significant differences in the three genotypes were observed between the CTCL cases and the control group, demonstrating that Arg72Pro polymorphism of the p53 gene is not associated with the risk of developing cutaneous lymphomas (P > 0.05). CONCLUSIONS: We found an association of beta-catenin and p53 overexpression without detection of structural alteration in the genes, suggesting that p53 mutation is not an important mechanism for beta-catenin activation in primary CTCL. Additionally, we speculate that the p53 codon 72 polymorphism may influence negative feedback control involving beta-catenin and p53.     

汗腺肿瘤P53及bcl-2蛋白的表达

目的 探讨Ｐ５３和ｂｃｌ－２蛋白在汗腺肿瘤中的表达及其意义。方法 对２２例良性,恶性汗腺肿瘤Ｐ５３及ｂｃｌ－２蛋白的表达进行了免疫组化检测。结果 １０例恶性汗腺肿瘤Ｐ５３和ｂｃｌ－２蛋白表达率率显著高于良笥肿瘤（Ｘ＾２值分别为１８．３３和８．５６,Ｐ均〈０．０５５）。Ｐ５３和ｂｃｌ－２蛋白表达强度显著正相关。结论;ｐ５３基因突变和ｂｃｌ－２蛋白表达在恶性汗腺肿瘤的发生和发展中起重要促进作用。     

Bowen病bcl-2及P53蛋白的表达

目的 :　探讨bcl- 2及P5 3蛋白在Bowen病及Bowen样鳞癌中的表达及其意义。方法 :　应用免疫组织化学技术对 11例Bowen病及 3例Bowen样鳞癌bcl- 2和 或P5 3蛋白的表达进行了检测。结果 :11例Bowen病中bcl- 2蛋白阳性 2例 (18% ) ,P5 3蛋白阳性 3例 (2 7% ) ;3例Bowen样鳞癌均见bcl- 2蛋白表达。Bowen病中bcl- 2与P5 3蛋白表达显著正相关 (r=0 .76 9,P <0 .0 5 )。结论 :　Bowen病中bcl- 2蛋白表达与P5 3基因突变有关 ,并参与了Bowen病的进展及向Bowen样鳞癌的演变     

Opposing effects of UVA1 phototherapy on the expression of bcl-2 and p53 in atopic dermatitis

Abstract Recently, medium-dose UVA1 phototherapy (50 J/cm²) has been introduced as an effective treatment for severe atopic dermatitis (AD). In order to further elucidate the mechanisms by which medium-dose UVA1 irradiation leads to an improvement in skin status in patients with AD, biopsy specimens from ten patients before and after treatment were analysed immunohistochemically for features of apoptosis. We sought to determine the extent to which UVA1 irradiation was able to modulate the balance between p53 and bcl-2 expression in vivo using monoclonal antibodies labelling these proteins. As compared with lesional skin of patients with AD before UVA1 irradiation, the number of dermal cells, apparently lymphocytes, that were positive for p53 had significantly increased after treatment and, in addition, some basal keratinocytes showed slight positive staining for p53. An increased expression of the bcl-2 gene before treatment in predominately dermal lymphocytes was significantly downregulated by UVA1 therapy. The increase in p53⁺ cells and the decrease in bcl-2⁺ cells were closely linked to a significant reduction in dermal T cells (CD3⁺) and a substantial clinical improvement in skin condition. In summary, medium-dose UVA1 irradiation led to a marked modulation of the expression of p53 and bcl-2, and this plays a key role in regulating UVA1-induced apoptosis. Received: 18 August 2000 / Revised: 8 November 2000 / Accepted: 1 February 2001     

Implications of bax, fas, and p53 in the pathogenesis of early-stage mycosis fungoides and alterations in expression following photochemotherapy

Background:

The underlying molecular basis of mycosis fungoides (MF) has not yet been clarified. However, defects in apoptosis may contribute to its pathogenesis.

Aim:

We investigated the expression of Bax, Fas, and p53 in early-stage MF patients and any alterations in expression following photochemotherapy.

Materials and Methods:

Bax, Fas, and p53 expressions were studied by immunohistochemistry in both keratinocytes and lymphocytes on paraffin-embedded skin specimens from 27 early-stage MF patients.

Results:

Bax, Fas, and p53 staining was shown in the lymphocytes in 0/27, 26/27, and 11/27 patients at the time of diagnosis, whereas these ratios were 0/27, 9/27, and 0/27, respectively, after psoralen plus ultraviolet A (PUVA) treatment. The decrease in p53 and Fas expression in the lymphocytes was found statistically significant. Bax, Fas, and p53 staining in the keratinocytes was shown in 5/27, 27/27, and 25/27 patients at the time of diagnosis, whereas these ratios were 0/27, 22/27, and 4/27, respectively, after PUVA treatment. The decrease in p53, Fas, and Bax expression in the keratinocytes was found statistically significant.

Conclusion:

Although Bax seems unrelated with early-stage MF, Fas and p53 expression in the lymphocytes may contribute to the understanding of the pathogenesis of this disease.