非小细胞肺癌患者呼出气冷凝液中p53蛋白检测的临床意义

目的 研究非小细胞肺癌(NSCLC)患者呼出气冷凝液(EBC)中p53蛋白检测的临床意义.方法 收集98例NSCLC患者的EBC和血浆,应用双抗体夹心ABC-ELISA法检测EBC和血浆中p53蛋白表达水平,并与98名健康对照者测定值比较.用免疫组化法检测98例NSCLC患者手术切除标本癌组织中p53蛋白表达.比较肺癌组中不同分型、分期、病理类型、肿瘤大小以及有无淋巴结转移、吸烟史者EBC和血浆中p53蛋白水平和癌组织p53蛋白阳性表达率.应用 ROC曲线分析肺癌组血浆及EBC的p53蛋白诊断肺癌的特异性及敏感性.结果 ①肺癌组EBC中p53蛋白测定值高于健康对照组(233.99±7.91)ng/L vs(130.26±4.73)ng/L,P＜0.01];肺癌组血浆p53蛋白测定值高于健康对照组(292.58±8.79)ng/L vs(141.66±3.33)ng/L,P＜0.01].②肺癌组中央型患者EBC中p53蛋白测定值高于周围型患者(248.22±8.58)ng/L vs(215.78±6.61)ng/L,P＜0.05].③免疫组化阳性组EBC中p53蛋白测定值高于阴性组「(249.77±8.07)ng/L vs(216.86±7.44)ng/L,P＜0.05].④肺癌组中吸烟者血浆p53蛋白测定值高于无吸烟者(310.18±9.04)ng/L vs(254.55±6.91)ng/L,P＜0.01].⑤癌组织p53蛋白阳性表达率为47.96%(47/98).⑥血浆p53蛋白对于肺癌的诊断的敏感性为95.90%.特异性为90.04%;EBC p53蛋白埘于肺癌的诊断的敏感性为92.90%,特异性为79.59%;肺癌患者p53蛋白诊断最佳参考临界值血浆为175.68 ng/L,EBC为166.26 ng/L.结论 NSCLC患者中EBC p53蛋白的检测有助于肺癌的诊断.

Abstract：

Objective To study the clinical significance of the detection of p53 protein in exhaled breath condensate (EBC) of patients with non-small cell lung cancer (NSCLC). Methods EBC and plasma of 98 patients with NSCLC were collected,p53 protein expression in EBC and plasma was detected by enzyme-linked immunosorbent assay,and the data were compared with those of 98 healthy controls. p53 protein expression in cancer tissue of 98 patients with NSCLC was detected by immunohistochemistry. p53 protein expression in EBC and plasma and positive expression rate of p53 protein in cancer tissue were compared among patients with different lung cancer type,stage,histologic type,tumor size,and lymph node metastasis,smoking history. The specificity and sensitivity of diagnosis of p53 protein in patients with NSCLC were analyzed by ROC curve. Results ① The level of p53 protein in EBC of patients with NSCLC was significantly higher than that in healthy control group (233.99±7.91) ng/L vs ( 130. 26 ± 4. 73) ng/L,P ＜0. 01]. The level of p53 protein in serum of patients with NSCI.C was significantly higher than that in healthy control group (292. 58 ± 8. 79) ng/L vs (141. 66±3. 33) ng/L,P ＜0. 01]. ② The level of p53 protein in EBC of patients with central lung cancer was higher than that in patients with peripheral lung cancer (248. 22 ± 8. 58) ng/L vs (215. 78 ± 6.61) ng/L,P＜0. 01]. ③The level of p53 protein in EBC of patients with positive immunostaining group was higher than that in negative group (249.77 ± 8.07) ng/L vs (216.86 ± 7.44) ng/L,P ＜ 0. 05]. ④The level of p53 protein in serum of smokers was significantly higher than that in non-smokers (310.18 ± 9.04) ng/L vs (254. 55 ± 6. 91) ng/L,P ＜0. 01]. ⑤The positive expression rate of p53 protein in cancer tissue was 47. 96% (47/98). ⑥The sensitivity and specificity of diagnosis of p53 protein were 95. 90% and 90. 04% in plasma,and those were 92. 90% and 79. 59% in EBC. The cut off values of p53 protein were respectively 175. 68 ng/L and 166. 26 ng/L in EBC and serum. Conclusions The detection of p53 protein in EBC of patients with NSCLC is helpful for the diagnosis of lung cancer.

Clinical significance of detection of p53 protein in exhaled breath condensate of patients with non-small cell lung cancer

Objective To study the clinical significance of the detection of p53 protein in exhaled breath condensate (EBC) of patients with non-small cell lung cancer (NSCLC). Methods EBC and plasma of 98 patients with NSCLC were collected,p53 protein expression in EBC and plasma was detected by enzyme-linked immunosorbent assay,and the data were compared with those of 98 healthy controls. p53 protein expression in cancer tissue of 98 patients with NSCLC was detected by immunohistochemistry. p53 protein expression in EBC and plasma and positive expression rate of p53 protein in cancer tissue were compared among patients with different lung cancer type,stage,histologic type,tumor size,and lymph node metastasis,smoking history. The specificity and sensitivity of diagnosis of p53 protein in patients with NSCLC were analyzed by ROC curve. Results ① The level of p53 protein in EBC of patients with NSCLC was significantly higher than that in healthy control group (233.99±7.91) ng/L vs ( 130. 26 ± 4. 73) ng/L,P ＜0. 01]. The level of p53 protein in serum of patients with NSCI.C was significantly higher than that in healthy control group (292. 58 ± 8. 79) ng/L vs (141. 66±3. 33) ng/L,P ＜0. 01]. ② The level of p53 protein in EBC of patients with central lung cancer was higher than that in patients with peripheral lung cancer (248. 22 ± 8. 58) ng/L vs (215. 78 ± 6.61) ng/L,P＜0. 01]. ③The level of p53 protein in EBC of patients with positive immunostaining group was higher than that in negative group (249.77 ± 8.07) ng/L vs (216.86 ± 7.44) ng/L,P ＜ 0. 05]. ④The level of p53 protein in serum of smokers was significantly higher than that in non-smokers (310.18 ± 9.04) ng/L vs (254. 55 ± 6. 91) ng/L,P ＜0. 01]. ⑤The positive expression rate of p53 protein in cancer tissue was 47. 96% (47/98). ⑥The sensitivity and specificity of diagnosis of p53 protein were 95. 90% and 90. 04% in plasma,and those were 92. 90% and 79. 59% in EBC. The cut off values of p53 protein were respectively 175. 68 ng/L and 166. 26 ng/L in EBC and serum. Conclusions The detection of p53 protein in EBC of patients with NSCLC is helpful for the diagnosis of lung cancer.