摘要目的：研究miR-183-5p、TβRⅠ及TβRⅡ在食管鳞状细胞癌（ESCC）中的表达、临床意义及相互关系。方法检测miR-183-5p、TβRⅠ及TβRⅡmRNA及蛋白在ESCC细胞株TE-1、ECA-109、正常食管上皮细胞和72例ESCC患者肿瘤组织及对应癌旁组织中的表达，分析其临床意义及miR-183-5p和TβRⅠ、TβRⅡ的相互关系。通过细胞转染实验调节细胞株ECA-109中miR-183-5p的表达，探讨miR-183-5p对TβRⅠ、TβRⅡ表达及细胞功能的影响。结果与正常食管上皮细胞相比，ESCC细胞株TE-1和ECA-109中miR-183-5p的表达增高（均P＜0.05），TβRⅠ、TβRⅡ的表达降低（均P＜0.05）。与癌旁组织相比， ESCC患者癌组织中miR-183-5p表达升高，而TβRⅠ、TβRⅡ表达降低（均P＜0.05）。miR-183-5p的表达与患者性别、肿瘤分化、分期、远处转移、淋巴结转移及肿瘤位置相关（均P＜0.05）；TβRⅠ的表达与患者性别、淋巴结转移、肿瘤大小相关（均P＜0.05）；TβRⅡ的表达与淋巴结转移、肿瘤大小相关（均P＜0.05）。相关性分析显示，miR-183-5p在癌组织中的表达与TβRⅠ的表达呈负相关（r＝-0.521，P＜0.05）。在细胞转染实验中，miR-183-5p过表达时，TβRⅠ表达下调，肿瘤细胞生长加速，迁移能力增强（均P＜0.05）；miR-183-5p低表达时，TβRⅠ表达上调，肿瘤细胞生长减慢，迁移能力减弱（均P＜0.05）；TβRⅡ在转染实验中无明显变化。结论 miR-183-5p与TβRⅠ的异常表达密切相关，可能在ESCC淋巴结转移中发挥重要作用。

abstractsObjective To study the expression and clinical significance of miR-183-5p, TβRⅠ and TβRⅡ in esophageal squamous cell carcinoma (ESCC). Methods The mRNA and protein expression of miR-183-5p, TβRⅠ and TβRⅡ were examined in ESCC cell lines ECA-109, TE-1, normal esophageal epithelial cells, tumor tissues and tumor-free tissues from 72 ESCC patients. Their clinical significance and the relationship between miR-183-5p and the latter two were analyzed. The effects of miR-183-5p on the expression of TβRⅠand TβRⅡ in ECA-109 cells and the cell functions of ECA-109 were also investigated. Results Compared with the normal esophageal epithelia cells, ESCC cell lines TE-1 and ECA-109 were statistically characterized by a high expression of miR-183-5p (all P<0.05) and low expression of TβRⅠand TβRⅡ(all P<0.05). The expression of miR-183-5p in ESCC tissues was higher than that in adjacent normal tissues, while the expressions of TβRⅠ and TβRⅡ were lower (all P< 0.05). The expression of miR-183-5p was closely related to sex, tumor differentiation, tumor staging, distant metastasis, lymphatic metastasis, and tumor location (all P<0.05). TβRⅠlevel was associated with sex, lymph node metastasis and tumor size (all P<0.05). Experimental data showed the negative correlation between the expression of miR-183-5p and TβRⅠin ESCC tissues (r= -0.521, P< 0.05). Over expression of miR-183-5p significantly inhibited the expression of TβRⅠ in ECA-109 cells (P< 0.05) and promoted the growth, invasion and metastasis of ECA-109 cells (P< 0.05). Low expression of miR-183-5p significantly promoted the expression of TβRⅠ in ECA-109 cells (P< 0.05), and suppressed the growth, invasion and metastasis of ECA-109 cells (P< 0.05). There was no significant change in the expression of TβRⅡ in the transfection experiments. Conclusion MiR-183-5p is closely related to the abnormal expression of TβRⅠ, which may exert an important role in the progression of lymphatic metastasis.