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KB
Tissue
宫颈内口
Disease
腺癌
Synonyms
Strain KB

Documents

KB

Cell line · Product number 300446

The KB cell line is an adherent epithelial cell line initially believed to be derived from an epidermal carcinoma of the mouth. However, subsequent analys...

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  • CoA
1

01General information

Description

KB 细胞系是一种粘附性上皮细胞系,最初被认为是从口腔表皮癌中提取的。然而,随后的分析(包括同工酶测定、HeLa 标记染色体鉴定和 DNA 指纹鉴定)显示,KB 细胞系实际上是通过污染 HeLa 细胞而建立的。这一错误鉴定强调了在研究中对细胞系进行严格鉴定的重要性。

经免疫过氧化物酶染色证实,KB 细胞表达角蛋白,这是上皮细胞的一种关键结构蛋白。此外,还发现它们含有人类乳头瘤病毒 18(HPV-18)的序列,这可能是病毒肿瘤学相关研究的兴趣所在。KB 细胞的同工酶谱包括葡萄糖-6-磷酸脱氢酶(G6PD)A 型,这与 HeLa 细胞的特征一致。鉴于这些发现,必须认识到 KB 细胞与 HeLa 细胞有许多共同的生物特性,包括存在 HeLa 特异性标记染色体。

因此,KB 细胞应谨慎使用,尤其是在对确切的细胞来源至关重要的实验中。尽管如此,KB 细胞仍然是研究上皮细胞行为、癌症生物学以及病毒整合和表达机制的有用模型。与所有细胞系一样,KB 细胞仅用于体外研究,不适用于治疗或体内应用。

Tissue
宫颈内口
Disease
腺癌
Synonyms
  • Strain KB

02Classification

Organism
Human
Sex
Female
Growth properties
Adherent
Biosafety level
1

03Characteristics

Morphology
上皮样
Cell type
表皮
Karyotype
2n = 46

04Identifiers

Citation
KB(Cytion 目录号 300446)
NCBI TaxID
9606
Cellosaurus
CVCL_0372

05Expression and susceptibility

Isoenzymes
G6PD,A 型
Virus susceptibility
脊髓灰质炎病毒 1、腺病毒 3
Products
角蛋白

06Handling 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。
Seeding density
2×10⁴个细胞/cm²将在2至3天内形成融合单层。
Fluid renewal
每周 2 至 3 次
Post-thaw recovery
解冻后,将细胞以5×10⁴个细胞/平方厘米的密度接种于培养皿中,使细胞从冷冻过程中恢复并至少贴壁24小时。
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.

07Quality 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。

08Donor

Donor age
30年
Ethnicity
非洲裔美国人