SACC-83来源的外泌体调节唾液腺间质成纤维细胞表达FAP的实验研究  

SACC-83-derived exosomes induce fibroblast activation protein expression in normal salivary gland stromal fibroblasts

作　　者：宋梦阳 王方圆 侯晋[1] 殷学民[1] SONG Mengyang WANG Fangyuan HOU Jin YIN Xuemin.(510515 Guangzhou , Department of Oral and Maxillofacial Surgery, Nanfang Hospital, Southern Medical University, China)

机构地区：[1]南方医科大学南方医院口腔颌面外科,南方医科大学口腔医学院,广州510515

出　　处：《实用口腔医学杂志》2017年第1期69-73,共5页Journal of Practical Stomatology

基　　金：广东省科技计划项目(编号:2014A020212397)

摘　　要：目的:研究腺样囊性癌(adenoid cystic carcinoma,ACC)细胞SACC-83来源的外泌体(exosome,EXO)对人正常唾液腺间质成纤维细胞(human normal salivary gland stromal fibroblasts,hSGSFs)表达成纤维细胞活化蛋白(fibroblast activation protein,FAP)的影响。方法:采用超滤管浓缩与EXO提取试剂盒相结合的方法从SACC-83的培养上清中提取EXO,通过透射电镜及Western Blot对所提取的EXO进行鉴定;将SACC-83来源的EXO用荧光染料PKH67标记后与hSGSFs共培养48 h,采用激光扫描共聚焦显微镜(LSCM)观察hSGSFs对于SACC-83来源的EXO的摄取情况;利用qRT-PCR和Western Blot法检测在SACC-83来源的EXO作用下,hSGSFs中FAP的表达变化。结果:SACC-83培养上清中所提取到的微囊泡直径为30~100 nm,EXO的膜蛋白标记物CD63和TSG101的表达为阳性;携带PKH67荧光标记的EXO可被hSGSFs摄取,并可在mRNA和蛋白水平上调hSGSFs中FAP的表达。结论:SACC-83来源的EXO可被hSGSFs摄取,并可显著上调hSGSFs中FAP的表达。提示ACC可能通过EXO途径促进正常唾液腺间质成纤维细胞向癌相关成纤维细胞(cancer-associated fibroblasts,CAF)的转化。Objective： To study the effects of exosomes（EXO） released by adenoid cystic carcinoma SACC-83 cells on the expression of fibroblast activation protein （FAP） in normal human salivary gland stromal fibroblasts （hSGSFs）. Methods： ACC exosomes were i- solated from SACC-83 cell culture supernatant by using Total Exosome Isolation Reagent. The whole-mount EXO were characterized and assessed by transmission electron microscope and Western Blot. The exosomes were labeled with green fluorescent dye PKH67 and co-cultured with hSGSFs for 48h, followed by staining with Alexa Fluor 594 Phalloidin and DAPI. Afterwards, exsosomes uptake was observed under a laser scanning confocal microscope. After a 48-hour co-culture of SACC-83 exosomes with hSGSFs, the expression of FAP in SACC-83-EXO-treated hSGSFs was investigated by qRT-PCR and Western Blot. Results： The vesicles isolated from SACC-83 cell culture supernatant had the reported size range of 30 -100 nm, expressed the exosomal marker CD63 and TSG101. After co-cul- ture of hSGSFs with PKH67 labeled SACC-83 exosomes, exosomes were taken up by hSGSFs and FAP expression was elevated in hSGSFs. Conclusion： Exosomes derived from SACC-83 cells can be taken up by hSGSFs and can induce the expression of FAP in hSGSFs. These results suggest that exosomes derived from SACC-83 cells might induce the transformation of normal salivary gland stro- mal fibroblasts to cancer associated fibroblasts.

关 键 词：腺样囊性癌 外泌体 成纤维细胞活化蛋白 癌症相关成纤维细胞 

分 类 号：R739.8[医药卫生—肿瘤]