食管鳞癌组织中NK细胞和DC浸润与预后的关系

Prognostic Significances of Natural Killer Cells and Dendritic Cells Infiltrations in Esophageal Squamous Cell Carcinoma

背景与目的自然杀伤(naturalkiller,NK)细胞和树突细胞(dendriticcell,DC)在抗肿瘤免疫中发挥重要作用。热休克蛋白(heatshockprotein,HSP)也参与抗肿瘤细胞免疫。本研究旨在探讨食管鳞癌组织中NK细胞和DC浸润与预后的关系及其与HSP27、HSP70表达的关系。方法应用免疫组化SP法检测101例食管鳞癌组织中NK细胞和DC的浸润情况。根据临床病理资料和随访结果,对比分析NK细胞和DC在临床病理特征相同、但术后生存时间明显不同的两组病例(长期生存组术后生存5年以上,38例;短期生存组术后1年内死亡,63例)癌组织中的浸润情况。同时,分析NK细胞和DC浸润与HSP27、HSP70表达的关系。结果免疫组织化学染色结果显示101例食管鳞癌组织中每高倍视野(×400)NK细胞平均数为(31.4±19.7)个,其中长期生存组癌组织中每高倍视野NK细胞平均数为(41.9±21.7)个,明显高于短期生存组(25.0±15.4)个(P<0.001)。DC在101例食管鳞癌组织中每高倍视野细胞平均数为(14.8±7.8)个,长期生存组和短期生存组癌组织中每高倍视野DC平均数分别为(15.2±8.6)个和(14.5±7.4)个,t检验显示两组无显著性差异(P>0.05)。NK细胞和DC浸润与肿瘤长度、浸润深度、病理分级、淋巴结转移等临床病理特征均无相关性(P>0.05)。二项分类logistic回归分析显示NK细?

BACKGROUND & OBJECTIVE: Natural killer (NK) cell and dendritic cell (DC) play important roles in anti-tumor immunity. Heat shock protein (HSP) is also involved in anti-tumor immune mechanisms. This study was to explore prognostic significances of NK cells and DCs infiltrations in esophageal squamous cell carcinoma (ESCC), and their relationships with expressions of HSP27 and HSP70. METHODS: NK cells, and DCs infiltrations were detected by SP immunohistochemistry in 101 specimens of ESCC. Among the relevant 101 patients, 38 were classified into long-term survival group (≥5 years), and 63 into short-term survival group (≤1 year) according to follow-up data. The 2 groups were matched in all pathologic and clinical features but post-esophagectomy survival time. Infiltrations of NK cells and DCs in ESCC were compared between the 2 groups. Relationships of NK cells and DCs infiltrations to expressions of HSP27 and HSP70 were statistically analyzed. RESULTS: Immunohistochemical results showed that the mean number of NK cells in the 101 specimens of ESCC was 31.4±19.7 per high-power field (×400, HPF), that in long-term survival group was much higher than that in short-term survival group [(41.9±21.7)/HPF vs. (25.0±15.4)/HPF, P < 0.001]. The mean number of DCs in the 101 specimens of ESCC was (14.8±21.7)/HPF; there was no significant difference between long-term and short-term survival groups [(15.2±8.6)/HPF vs. (14.5±7.4)/HPF, P > 0.05, t test]. NK cells and DCs infiltrations in ESCC had no significant correlation with clinicopathologic features, such as length of tumor, depth of invasion, histological grade, and lymph node metastasis, etc. (P > 0.05). Binary logistic regression analysis indicated that infiltration of NK cells was of prognostic significance for ESCC (P=0.001), while DCs was not (P=0.842). Infiltration of NK cells was positively correlated with infiltration of DCs (r=0.266, P=0.007). Both infiltrations of NK cells and DCs were positively correlated with expression of HSP27 (P=0.017, P=0.018), while no such correlation with expression of HSP70 was found (P > 0.05). CONCLUSIONS: Infiltration of NK cells is an independent prognostic factor of ESCC, and might be a prognostic biomarker of ESCC. Infiltration of DCs has no correlation with prognosis of ESCC. Infiltrations of NK cells and DCs may have internal correlation with the expression of HSP27.