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O-342
Tissue
卵巢
Disease
腺癌

Documents

O-342

Cell line · Product number 500305

The O-342 cell line is derived from a rat ovarian tumor and is widely used in cancer research, particularly in studies focusing on ovarian cancer and chem...

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1

01General information

Description

O-342细胞系源自大鼠卵巢肿瘤,广泛应用于癌症研究,尤其在卵巢癌及化疗耐药性研究中。该细胞系具有单层生长能力,接种后约24小时进入对数生长阶段,细胞倍增时间约为24小时。 O-342细胞系作为多个亚系的亲本系,其中包括通过体外逐步增加顺铂浓度获得的顺铂耐药亚系O-342/DDP。

O-342细胞呈现染色体结构的异倍性,与O-342/DDP亚系近二倍体的核型形成鲜明对比。这种核型变化表明持续顺铂暴露产生的选择压力消除了敏感亚群,导致耐药细胞占主导地位。 生化分析表明,O-342/DDP细胞对顺铂的耐受性较亲本O-342细胞提升33倍。该耐受性体现在半数抑制浓度(ID50)值上:O-342/DDP细胞的ID50为33 μM,而O-342细胞仅为1 μM。

后续研究发现,O-342/DDP细胞的细胞内总谷胱甘肽(GSH+GSSG)水平显著升高,达3.04 nmol/10⁶细胞,而O-342细胞仅为1.37 nmol/10⁶细胞。 谷胱甘肽水平的升高与解毒能力增强相关,这正是O-342/DDP细胞呈现化疗耐药性的关键因素。此外,顺铂处理后,亲本O-342细胞的DNA链间交联和单链断裂程度显著高于耐药亚系O-342/DDP细胞,表明耐药亚系具有更强的DNA修复能力。

总体而言,O-342细胞系及其顺铂耐药亚系O-342/DDP为研究卵巢癌化疗耐药机制提供了可靠模型。这些细胞系对于识别潜在治疗靶点、开发克服化疗耐药的策略具有重要价值,从而有望改善卵巢癌患者的治疗效果。

Tissue
卵巢
Disease
腺癌

02Classification

Organism
Rat
Sex
Female
Growth properties
Adherent
Biosafety level
1

03Characteristics

Morphology
上皮样

04Identifiers

Citation
O-342(Cytion 目录号 500305)
NCBI TaxID
10116
Cellosaurus
CVCL_5847

05Handling and culture

Culture medium
EMEM(MEM Eagle),w:2 mM L-谷氨酰胺,w:2.2 g/L NaHCO3,w:EBSS(Cytion 文章编号 820100a)。
Incubation atmosphere

37°C, 5%CO2, 加湿环境。

Supplements
在培养基中添加 10% FBS 和 1% NEAA
Dissociation reagent
Accutase
Subculturing
去除粘附细胞上的旧培养基,用不含钙和镁的 PBS 冲洗。T25 烧瓶用 3-5 毫升 PBS,T75 烧瓶用 5-10 毫升。然后用 Accutase 完全覆盖细胞,T25 烧瓶用 1-2 毫升,T75 烧瓶用 2.5 毫升。让细胞在室温下孵育 8-10 分钟,使其分离。孵育后,用 10 毫升培养基轻轻混合细胞使其重悬,然后用 300xg 离心 3 分钟。弃去上清液,用新鲜培养基重悬细胞,并将其转移到已装有新鲜培养基的新烧瓶中。
Fluid renewal
每周 2 至 3 次
Thawing and culturing
  1. Confirm that the vial remains deeply frozen upon delivery, as cells are shipped on dry ice to maintain optimal temperatures during transit.

  2. Upon receipt, either store the cryovial immediately at temperatures below -150°C to ensure the preservation of cellular integrity, or proceed to step 3 if immediate culturing is required.

  3. For immediate culturing, swiftly thaw the vial by immersing it in a 37°C water bath with clean water and an antimicrobial agent, agitating gently for 40-60 seconds until a small ice clump remains.

  4. Perform all subsequent steps under sterile conditions in a flow hood, disinfecting the cryovial with 70% ethanol before opening.

  5. Carefully open the disinfected vial and transfer the cell suspension into a 15 ml centrifuge tube containing 8 ml of room-temperature culture medium, mixing gently.

  6. Centrifuge the mixture at 300 x g for 3 minutes to separate the cells and carefully discard the supernatant containing residual freezing medium.

  7. Gently resuspend the cell pellet in 10 ml of fresh culture medium. For adherent cells, divide the suspension between two T25 culture flasks; for suspension cultures, transfer all the medium into one T25 flask to promote effective cell interaction and growth.

  8. Adhere to established subculture protocols for continued growth and maintenance of the cell line, ensuring reliable experimental outcomes.

06Quality control and cryopreservation

Sterility

使用基于 PCR 的检测方法和基于发光的支原体检测方法排除支原体污染。

为确保没有细菌、真菌或酵母菌污染,每天都要对细胞培养物进行目视检查。

Freeze medium
我们使用完全生长培养基(包括 FBS)+10% DMSO 或 CM-1(Cytion 商品目录编号 800100)作为冷冻保存培养基,以获得足够的解冻后存活率,CM-1(Cytion 商品目录编号 800100)含有优化的渗透保护剂和代谢稳定剂,可提高恢复能力并减少冷冻引起的应激。
Storage conditions

如需长期保存,可将样品瓶放入气相液氮中,温度约为 -150 至 -196 ℃。在-80 °C下保存只能作为转入液氮前的短暂过渡。

Shipping conditions

冷冻保存的细胞系用干冰装运,并用经过验证的隔热包装和足够的制冷剂在整个运输过程中保持约 -78 °C 的温度。收到货后,应立即检查容器,并立即将小瓶转移到适当的储藏室。

07Donor

Breed / subspecies
BDIx