中文摘要：

目的：探讨Bax和PHF20蛋白在喉鳞状细胞癌（LSCC）中的表达情况及临床意义。方法：应用免疫组织化学SP法检测LSCC组织及癌旁正常黏膜组织中Bax与PHF20的表达情况,分析Bax和PHF20的表达与LSCC患者的临床分型、病理类型、组织学分级及淋巴结转移等临床病理参数之间的关系。结果：1与癌旁切缘正常喉黏膜组比较,LSCC组中Bax和PHF20的表达量均明显降低,差异均有统计学意义（P〈0.01）。2在临床分型中,LSCC声门上型、声门型、声门下型3组中Bax和PHF20蛋白表达量及表达阳性率差异均无统计学意义（P〉0.05）。在组织学分化分组及病理学分型中,Bax和PHF20蛋白表达量及阳性表达率在低分化的LSCC组织中与高、中分化的LSCC组织相比,均显著降低（分别为P〈0.01与P〈0.05）。在T分期分组中,Bax和PHF20蛋白表达量及阳性率在T1＋T2组均显著高于T3＋T4组（均P〈0.01）。在有无淋巴结转移分组中,无淋巴结转移的LSCC组织中Bax和PHF20的表达量及阳性率均明显高于发生淋巴结转移者（均P〈0.01）。结论：Bax和PHF20的缺失可能与LSCC的发生及进展有关。进一步研究Bax和PHF20对LSCC细胞生物学行为的影响以及可能的分子调控机制,为明确LSCC发生发展提供了新的思路。

英文摘要：

Objective： To investigate the expression of Bax and PHF20 in laryngeal squamous cell carcinoma （LSCC）and to discuss their relevance and the roles in carcinogenesis and development in LSCC. Method： The expressions of Bax and PHF20 in the LSCC tissues and normal mucosa tissues adjacent to carcinoma were detected by SP immunohistochemistry assay. The relationship between the expressions of Bax and PHF20 and the clinicopathological characteristics including clinical stage, pathological type, histological grade and lymph node metastasis in LSCC were analyzed according to the clinical data. Result： （1）The expressions of Bax and PHF20 were both significantly lower in the LSCC tissue than that in the normal laryngeal tissue （P〈0.01）. （2） In clinical stage grouping, there were no statistical differences of the quantity and positive rate of Bax and PHF20 expressions among supraglottic, glottic and subglottic LSCC （P〉0.05）. In histological differentiation grouping, the quantity and positive rate of Bax and PHF20 expressions decreased significantly in poorly differentiated LSCC compared with the well and moderately differentiated LSCCs （P〈0.01, P〈0.05, respectively）. In T stage grouping, the quantity and positive rate of Bax and PHF20 expressions were both significantly higher in T1 ＋T2 compared with Ta ＋T4 （both P〈0.01）. In addition, the quantity and positive rate of Bax and PHF20 expressions were both significantly higher in LSCC with lymph node metastasis compared to that without lymph node metastasis （both P〈 0. 01）. Conclusion： The lack of Bax and PHF20 might contribute to the carcinogenesis and development in LSCC. The positive expression of Bax and PHF20 maybe relative to T term degree, differentiation degree and lymphamatic metastasis of LSCC.