肾上腺髓质素在人喉癌组织中的表达

目的观察肾上腺髓质素(adrenomedullin,AM)在人喉癌中的表达、分布和随着肿瘤进展其含量的变化。方法运用免疫组化方法观察喉癌组织中AM分布特点,放射免疫分别测定新鲜喉癌组织标本、非癌喉黏膜含量和喉癌患者术前血浆、健康对照血浆中AM浓度。结果选取的21例喉癌石蜡标本免疫组化染色均有AM表达,可以观察到AM表达主要在癌细胞细胞质中,高分化鳞癌癌巢周边癌细胞染色强而中心位置染色弱,中分化和低分化喉癌标本中癌巢AM染色较均一,间质染色较重。喉癌组织中AM含量为(49.67±28.33)pg/ml(x-±s,n=44,以下同),癌旁非癌喉黏膜组织(距离肿瘤1cm喉黏膜组织,组织病理证实无肿瘤浸润)AM含量为(14.71±7.17)pg/ml,肿瘤组织AM含量较癌旁非癌喉黏膜组织高(u=135.00,P<0.01)。T2、T3和T4期喉癌患者癌组织中AM含量依次为(31.52±15.22)pg/ml、(56.63±18.51)pg/ml和(96.12±18.22)pg/ml,差异有统计学意义;N0、N1期患者喉癌组织中AM含量差异无统计学意义(u=30.00,P>0.05),重新分组发现AM含量关系为(N0+N1)M0,差异有统计学意义(u=31.00,P<0.01)。喉癌患者术前血浆AM质量浓度为(10.75±2.49)pg/ml(n=20),健康对照血浆质量浓度为(9.74±2.39)pg/ml(n=20),喉癌患者术前血浆AM浓度和健康对照组间差异无统计学意义(u=153.00,P>0.05)。结论喉癌组织中存在AM高表达,喉癌组织AM含量与TNM分期有关,AM含量增加与肿瘤的进展有关。

Expression of adrenomedullin in the tissue with laryngeal carcinoma

OBJECTIVE: To observe the expression of adrenomedullin (AM) in the patients with laryngeal carcinoma. METHODS: Two-step immunohistochemistry method was used to examine the expression of AM in the patients with laryngeal carcinoma. Radioimmunoassay was applied to determine the concentration of AM in the laryngeal carcinoma tissues, adjacent laryngeal mucosa of carcinoma tissues and in the plasm of patients and controls. RESULTS: Positive stainings for AM were found in all 21 specimen examined,distributed mainly in the cytoplasm of the laryngeal carcinoma cells. Positive stainings were more stronger in the circumference than in the center of tumor tissue for the highly and moderately differentiated tumors. While the stainings were distributed homogeneously for poorly and moderately differentiated tumors. The concentration of AM in the laryngeal carcinoma tissues (n = 44) and the adjacent mucosa (n = 44) were (49.67 +/- 28.33) pg/ml and (14.71 +/- 7.17) pg/ml (x +/- s) respectively and laryngeal tumor showed much higher concentration of AM than the adjacent mucosa (u = 135.00, P < 0.01). The concentration of AM in patients with laryngeal carcinoma of T2, T3 and T4 stage were (31.52 +/- 15.22), (56.63 +/- 18.51) and (96.12 +/- 18.22) pg/ml (x + s) respectively,and there were statistically significant difference among them. In the N stage, patients with higher stages were found to express significantly higher AM concentration, but there was not statistically significant difference between NO stage and N1 stage. In the M stage,patients with M1 stage were found to express significantly higher AM concentration (u = 31.00, P < 0.01). But there was not statistically significant difference between AM plasm concertation of laryngeal carcinoma patients and that of healthy controls. Conclusions. The results suggested that high expression of AM in tissues of laryngeal carcinoma was related with the TNM stage of laryngeal carcinoma, AM may play an important role in the development of the laryngeal neoplasma.