Background and purpose: Human non-melanocytic skin tumors are the most common forms of skin tumors. Recent studies showed that c-FLIP plays a key role in the development of tumors. This study aimed to investigate the expression of c-FLIP protein in human non-melanocytic skin tumors and its clinical significance. Methods: The immunohistochemical method was used to determine the expression of c-FLIP in 81 human nonmelanocytic skin tumors. Results: The positive expressive rate of c-FLIP in 4 research groups are all significantly higher than in the normal control group, and therefore showed a statistical differences (P＜0.01). The abnormal expression of c-FLIP in four research groups increase with malignancy of these diseases, but there were no statistical differences (P＞0.05). The abnormal expression of c-FLIP in the SCC stage Ⅱ - Ⅲ were higher than that in the stage Ⅰ, but there were also no statistical differences (P＞0.05). The positive expressive rate of c-FLIP in SCC correlated with the extent of infiltration and tumor metastasis (P＜0.05). Conclusion: c-FLIP proteins play an important role in the genesis and progress of human non-melanocytic skin tumors.%背景与目的:非黑素细胞性皮肤肿瘤是皮肤肿瘤中最常见的一组类型,近来研究发现,c-FLIP在肿瘤的发生发展中发挥重要作用.本研究探讨c-FLIP在人非黑素细胞性皮肤肿瘤组织中的表达及其临床意义.方法:采用免疫组织化学SABC法检测81例人非黑素细胞性皮肤肿瘤组织标本和20例肿瘤周围正常皮肤组织和正常包皮组织标本中c-FLIP的表达水平,81例人非黑素细胞性皮肤肿瘤组织标本中,光线性角化病(actinic keratosis,AK)18例(AK组),鲍温样丘疹病(Bowenoid papulosiS,BP)15例(BP组),鲍温病(Bowen's disease,BD)16例(BD组),鳞状细胞癌(squamous cell carcinoma,SCC)32例(SCC组).分别统计比较各组c-FLIP阳性表达率在各临床病理学分级不同的疾病组中的差异.结果:c-FLIP在上述4组疾病组织中的阳性表达率均明显高于正常对照组,且差异具有统计学意义(P<0.01).各组组织中随着恶性程度的增高,c-FLIP的表达水平亦升高,但各组间c-FLIP表达率的差异均无统计学意义(P>0.05).SCC组II和III级中c-FLIP的表达率(86.7%)高于I期(94.1%),差异无统计学意义(P>0.05).在SCC组中,c-FLIP阳性表达率与肿瘤浸润深度和肿瘤转移有明显相关性(P<0.05).结论:c-FLIP在人非黑素细胞性皮肤肿瘤的发生发展过程中起重要作用.
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