细胞描述:
这株细胞于1988年七月建株,组织提供者是一位非吸烟人士。
细胞特性:
1) 来源:器官:肺 疾病:腺癌;非小细胞肺
2) 形态:纤维细胞样,贴壁生长
3) 规格:1×106cells
4) 培养条件:RPMI-1640培养基+10%优质胎牛血清+1%P/S (推荐货号AW-MC002)
空气,95%;二氧化碳,5%
37℃
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 (3)
Objective Lung adenocarcinoma (LUAD) is the most common subtype of lung cancer, with high morbidity and mortality. N6-methyladenosine (m6A) is an important regulator of LUAD progression. Here, we investigated the potential biological functions of ALKBH5 (a m6A demethylated enzyme) and cell division cycle associated protein 4 (CDCA4) in the progression of LUAD. Methods The expressions of CDCA4, METTL3, ALKBH5, FTO, YTHDC2 and YTHDC1 mRNA and proteins in LUAD and adjacent tissues, as well as NCI-H1299 and NCI-H157 cells were detected by RT-qPCR and western blot. Meanwhile, the role of ALKBH5 and CDCA4 in macrophage polarization was explored through tumor formation in Lewis lung carcinoma (LLC) mice and the co-culture system of NCI-H1299 and NCI-H157/THP-1 cells. Cell characterization was further analyzed. The expression of Ki-67 in tumor tissue was tested by immunohistochemistry. The scale of M1 and M2 macrophages was determined by flow cytometry. Results CDCA4 was significantly overexpressed in NCI-H1299 and NCI-H157 cell lines compared with BEAS-2B cells. The fold enrichment of CDCA4 m6A level in the overexpression (oe)-METTL3 or short hairpin (sh)-ALKBH5 cells was enhanced. Overexpression of CDCA4 promoted the cell viability, proliferation and migration, and inhibited apoptosis, which was reversed by sh-ALKBH5 intervention. Overexpression of YTHDC2 (not YTHDC1) inhibited the effect of CDCA4 on sh-ALKBH5 cells. sh-CDCA4 inhibited tumor growth and weight of LLC cells in mice, and promoted M1/M2 ratio in LLC mice and NCI-H1299/THP-1 and NCI-H157/THP-1 co-culture systems. Oe-CDCA4 promoted the volume and weight of tumor and inhibited the M1/M2 ratio of tumor tissue in LLC mice, but was reversed by sh-ALKBH5 intervention. Conclusion m6A demethylase ALKBH5 promotes the development of LUAD through CDCA4 regulation of malignant characterization and M1/M2 macrophage polarization.
Cell division cycle-associated protein 4 (CDCA4) has the potential to indicate lung adenocarcinoma (LUAD) development, but its regulatory role in mitophagy remains unclear. This study aimed to elucidate the mitophagy regulation and therapeutic implications of CDCA4 in LUAD. CDCA4 expression was significantly elevated in LUAD clinical specimens versus paracancerous tissues and inversely correlated with mitophagy activity. Lentiviral vectors were employed to manipulate established LUAD cells, followed by treatment with chloroquine (CQ; lysosomal inhibitor) and rapamycin (autophagy inducer) in CDCA4-silenced cells. CDCA4 knockdown elevated total and mitochondrial superoxide levels, disrupted mitochondrial membrane potential, activated the PINK1/Parkin pathway, enhanced LC3-II conversion, and degraded mitochondrial membrane proteins, collectively promoting mitophagy. Silencing CDCA4 suppressed malignant phenotypes (proliferation/migration), effects reversed by CQ but exacerbated by rapamycin. Mechanistically, CDCA4 interacted with SERTAD1 and E2F1 and stabilized these proteins. The promotion of mitophagy by CDCA4 silencing was impaired by the overexpression of SERTAD1 and E2F1. LUAD cells silencing CDCA4 were injected into immunodeficient mice for in vivo verification. CDCA4-silenced xenografts exhibited suppressed tumor growth, increased apoptosis, and elevated mitophagy-related markers. This study identifies the CDCA4/SERTAD1/E2F1 complex as a pivotal mitophagy-inhibitory hub in LUAD, proposing this axis as a novel predictive and therapeutic target.
Background Ferroptosis, a type of autophagy-dependent cell death, has been implicated in the pathogenesis of lung adenocarcinoma (LUAD). This study aimed to investigate the involvement of coatomer protein complex I subunit zeta 1 (COPZ1) in ferroptosis and ferritinophagy in LUAD. Methods Publicly available human LUAD sample data were obtained from the TCGA database to analyze the association of COPZ1 expression with LUAD grade and patient survival. Clinical samples of LUAD and para-carcinoma tissues were collected. COPZ1-deficient LUAD cell model and xenograft model were established. These models were analyzed to evaluate tumor growth, lipid peroxidation levels, mitochondrial structure, autophagy activation, and iron metabolism. Results High expression of COPZ1 was indicative of malignancy and poor overall survival. Clinical LUAD tissues showed increased COPZ1 expression and decreased nuclear receptor coactivator 4 (NCOA4) expression. COPZ1 knockdown inhibited xenograft tumor growth and induced apoptosis. COPZ1 knockdown elevated the levels of ROS, Fe 2+ and lipid peroxidation. COPZ1 knockdown also caused mitochondrial shrinkage. Liproxstatin-1, deferoxamine, and z-VAD-FMK reversed the effects of COPZ1 knockdown on LUAD cell proliferation and ferroptosis. Furthermore, COPZ1 was directly bound to NCOA4. COPZ1 knockdown restricted FTH1 expression and promoted NCOA4 and LC3 expression. NCOA4 knockdown reversed the regulation of iron metabolism, lipid peroxidation, and mitochondrial structure induced by COPZ1 knockdown. COPZ1 knockdown induced the translocation of ferritin to lysosomes for degradation, whereas NCOA4 knockdown disrupted this process. Conclusion This study provides novel evidence that COPZ1 regulates NCOA4-mediated ferritinophagy and ferroptosis. These findings provide new insights into the pathogenesis and potential treatment of LUAD.















