细胞描述:
来自未分化鼻咽癌(NPC)的细胞系。该细胞系在长期培养中始终携带Epstein-Barr病毒(EBV)。C666-1是其亲代细胞系C666的亚克隆,源自中国南方的NPC异种移植物。
细胞特性:
1) 来源:人鼻咽癌组织
2) 形态:上皮细胞样,贴壁生长
3) 规格:1×106cells
4) 培养条件:1640+10%FBS+1%P/S (推荐货号AW-MC002)
空气,95%;二氧化碳,5%
37℃
5)注意事项: C666-1细胞极易消化,加入胰酶后,在无菌操作台消化10s左右即可,完全培养基终止后,请离心(1000rpm,5min)去掉胰酶,细胞贴壁不牢,不要经常挪动,尤其是传代后 不要频繁拿出细胞观察。
细胞接收后的处理:
1) 收到细胞后,活细胞首先观察培养瓶是否完好,培养液是否漏液,培养基是否浑浊;冻存细胞是否干冰已挥发完,冻存管盖是否脱落,破碎,若有这类情况,请务必拍照记录,并于收货24h内与我们联系。
2) 细胞处理:
复苏的细胞:如果是T-25培养瓶活细胞,收到后请用75%的酒精对培养瓶表面进行消毒处理,然后转入培养箱中静置2~3h后再进行后续处理。
备注:运输用的培养基不宜再次用来培养细胞,请按照说明书新配置完全培养基来培养细胞。
冻存细胞:如果是干冰运输的冻存细胞,收到后请立即转入液氮存储或者短暂(24h)放置-80度冰箱保存,或者直接进行细胞复苏。
细胞复苏、传代及冻存流程参考:
1、 细胞复苏
1) 配制完全培养基:基础培养基+胎牛血清+双抗(特殊培养基特殊配置);
2) 细胞复苏:取5ml完全培养基于15ml离心管中,37℃水浴锅预热,从液氮管(或者-80度冰箱)中快速取出冻存的细胞,放入37℃水浴锅中,摇晃使快速化冻(1min左右),然后将化冻的细胞和预热的培养基,移入超净工作台中,化冻的细胞加入到含预热培养基的15ml离心管中,1000rpm离心5min;
3) 吸弃上清,得到细胞沉淀,用2ml完全培养基轻轻重悬细胞,加入到T25培养瓶中,做好标记,放入37℃,5%CO2饱和适度培养箱中培养(培养皿复苏效果更好);
4) 24h后,观察细胞贴壁情况(未贴壁的即为死细胞--针对贴壁细胞),吸弃旧培养基,加入新鲜的预热(室温或37℃)的完全培养基,继续培养。
2、 细胞传代
1) 待细胞生长到80%-90%汇合度时,吸弃旧的培养基,加入1ml无菌PBS润洗一次,以去除残余的培养基及血清(血清含有胰酶的抑制因子),然后加入1ml 0.25%胰酶,37℃培养箱中消化(1~2min左右,不同细胞消化时间不同),取出细胞,镜下观察细胞至细胞皱缩变圆;
2) 加入1ml完全培养基(含FBS)终止消化,轻轻拍打,使细胞脱落下来成单个细胞悬液,收集细胞于15ml无菌离心管中,1000rpm,离心5min;
3) 收集细胞沉淀,完全培养基重悬,一分为二(可根据细胞生长速度调整比例),分别加入到2个新的培养瓶中,做好标记,放入培养箱中培养。
3、细胞冻存
1) 按照细胞传代方法,在超净工作台内消化收集细胞沉淀,取少量细胞用于计数;
2) 用预冷的1ml冻存液(90%完全培养基+10%DMSO)或者无血清细胞冻存液重悬细胞,加入到1.2ml冻存管中,密度为1*106个/ml。
3) 放入程序冻存盒,-80℃过夜后,转入液氮长期保存。
参考文献 (1)
Background Nasopharyngeal carcinoma (NPC) is a malignant epithelial tumor of the nasopharyngeal mucosa with a high incidence rate all over the world. Methyltransferase-like 14 (METTL14) is a major RNA N6-adenosine methyltransferase implicated in tumor progression by regulating RNA function. This study is designed to explore the biological function and mechanism of METTL14 in NPC. Methods METTL14 and Amine oxidase copper containing 1 (AOC1) expression were detected by real-time quantitative polymerase chain reaction (RT-qPCR). The protein levels of METTL14, AOC1, Cyclin D1, B-cell lymphoma-2 (Bcl-2), and N-cadherin were measured using western blot. Cell proliferation, cycle progression, apoptosis, migration, and invasion were assessed using 5-ethynyl-2’-deoxyuridine (EdU), Colony formation, flow cytometry, wound scratch, and transwell assays. The interaction between METTL14 and AOC1 was verified using RNA immunoprecipitation (RIP), methylated RNA immunoprecipitation (MeRIP), and dual-luciferase reporter assays. The biological role of METTL14 on NPC tumor growth was examined by the xenograft tumor model in vivo. Results METTL14 and AOC1 were highly expressed in NPC tissues and cells. Moreover, METTL14 knockdown might block NPC cell proliferation, migration, invasion, and induce cell apoptosis in vitro . In mechanism, METTL14 might enhance the stability of AOC1 mRNA via m6A methylation. METTL14 silencing might repress NPC tumor growth in vivo. Conclusion METTL14 might boosted the development of NPC cells partly by regulating the stability of AOC1 mRNA, which provided a promising therapeutic target for NPC treatment.














