肿瘤源性外泌体hsa-miR-29c-3p通过靶向ATAD2B调控宫颈鳞状细胞癌的血管生成  

Tumor-derived exosomal hsa-miR-29c-3p regulates angiogenesis in cervical squamous cell carcinoma by targeting ATAD2B

作　　者：张芳 李亚 周菲 谭松红 ZHANG Fang;LI Ya;ZHOU Fei;TAN Songhong(Department of Gynecology,Hengyang Central Hospital,Hengyang 421000,Hunan,China)

机构地区：[1]衡阳市中心医院妇科,湖南衡阳421000

出　　处：《中国肿瘤生物治疗杂志》2025年第2期151-160,共10页Chinese Journal of Cancer Biotherapy

基　　金：衡阳市指导性计划科研项目(No.202222035651)。

摘　　要：目的:探讨宫颈癌(CC)细胞SiHa源性外泌体hsa-miR-29c-3p在CC血管生成中的作用。方法∶收集2019年1月至2021年12月在衡阳市中心医院妇科就诊的45例宫颈鳞状细胞癌(CSCC)患者的癌组织标本和15例正常宫颈组织标本。常规培养SiHa细胞和人脐静脉内皮细胞(HUVEC),用Lipofectamine 2000将hsa-miR-29c-3p、miRNA-NC、si-hsa-miR-29c-3p和si-miRNA-NC转染至SiHa细胞中,记为miRNA-NC组、hsa-miR-29c-3p组、si-miRNA-NC组和si-hsa-miR-29c-3p组。用Lipofectamine 2000将mimic-NC、miR-29c-3p-mimic、pCMV-NC、pCMV-含AAA结构域的ATPase家族蛋白2B(ATAD2B)载体分别转染HUVEC,记为mimic-NC组、miR-29c-3p-mimic组、pCMV-NC组、pCMV-ATAD2B组和pCMV-ATAD2B+miR-29c-3p-mimic组。原位杂交(ISH)法检测CSCC组织中hsa-miR-29c-3p的表达,免疫组化(IHC)法检测CSCC组织和移植瘤组织中的CD31阳性血管。分离纯化SiHa、C33a细胞来源的外泌体,用透射电镜技术和WB法对其表征进行鉴定及进行HUVEC摄取实验。qPCR法检测SiHa、C33a细胞和外泌体中hsa-miR-29c-3p和ATAD2B mRNA的表达。成管试验、Transwell小室实验和划痕愈合实验检测外泌体对HUVEC成管和迁移能力的影响。双萤光素酶报告基因实验验证hsa-miR-29c-3p与ATAD2B的靶向结合关系,移植瘤实验检测各组SiHa细胞来源外泌体对移植瘤生长和血管增生的影响。结果:hsa-miR-29c-3p在CSCC组织中呈高表达且与其微血管密度(MVD)正相关(均P<0.05);SiHa、C33a细胞来源的外泌体完全符合典型外泌体形态和蛋白表达表征;在体外HUVEC摄取SiHa、C33a细胞来源的外泌体和其包含的hsa-miR-29c-3p;SiHa细胞来源的外泌体hsa-miR-29c-3p可在体外促进HUVEC的成管和迁移能力(均P<0.05);SiHa细胞来源的外泌体hsa-miR-29c-3p可促进移植瘤生长和血管增生;hsa-miR-29c-3p可与ATAD2B基因直接结合并调节其表达(均P<0.05)。过表达ATAD2B可逆转hsa-miR-29c-3p对HUVEC的成管、迁移和划痕愈合能力的促进作用(均P<0.Objective:To investigate the role of SiHa cell-derived exosomal hsa-miR-29c-3p in the angiogenesis of cervical cancer(CC).Methods:Cancer tissue specimens from 45 patients with cervical squamous cell carcinoma(CSCC)and normal cervical tissue specimens from 15 controls were collected from Department of Gynecology,Hengyang Central Hospital from January 2019 to December 2021.CSCC SiHa cells and human umbilical vein endothelial cells(HUVECs)were routinely cultured.miRNA-NC,hsa-miR-29c-3p,si-miRNA-NC,and si-hsa-miR-29c-3p were transfected into SiHa cells with Lipofectamine 2000,grouped as miRNA-NC group,hsa-miR-29c-3p group,si-miRNA-NC group and si-hsa-miR-29c-3p group,respectively.HUVECs were transfected with mimic-NC,miR-29c-3p-mimic,pCMV-NC,and pCMV-ATAD2B(ATPase family protein 2B with AAA domain)using Lipofectamine 2000,grouped as the mimic-NC group,miR-29c-3p-mimic group,pCMV-NC group,pCMV-ATAD2B group,and pCMV-ATAD2B+miR-29c-3p-mimic group.The expression of hsa-miR-29c-3p in CSCC tissues was detected by in situ hybridization(ISH),and CD31-positive blood vessels in CSCC tissues and xenograft tissues were detected by immunohistochemistry(IHC).Exosomes from SiHa and C33a cells were isolated and characterized using transmission electron microscopy(TEM)and western blotting(WB).The uptake of exosomes by HUVECs was examined.The expression of hsa-miR-29c-3p and ATAD2B mRNA in SiHa and C33a cells,as well as in their derived exosomes,was detected using qPCR.Tube-forming assay,Transwell assay,and scratch healing assay were performed to detect the effect of exosomes on the ability of HUVEC migration and tube formation.Dual luciferase reporter gene assay verified the interaction between hsa-miR-29c-3p and ATAD2B.Xenograft experiments examined the effects of SiHa cell-derived exosomes on transplanted tumor growth and angiogenesis in each group.Results:hsa-miR-29c-3p was highly expressed in CSCC tissues and was positively correlated with microvessel density(MVD)(all P<0.05).Exosomes derived from SiHa and C33a cells exhibited ty

关 键 词：宫颈鳞状细胞癌 外泌体 SiHa细胞 人脐静脉内皮细胞 血管生成 hsa-miR-29c-3p 含AAA结构域的ATPase家族蛋白2B(ATAD2B) 

分 类 号：R737.33[医药卫生—肿瘤]