Skip to content
AB2.2
Tissue
胚泡

Documents

AB2.2

Cell line · Product number 305738

The AB2.2 cell line is a widely utilized murine embryonic stem (ES) cell line derived from the 129S7 (also known as 129P2/OlaHsd) mouse strain. It has pla...

US$650.00excl. tax and shipping
Low stock
Lot
Recommended (freshest lot)
1

01General information

Description

AB2.2细胞系是一种广泛使用的小鼠胚胎干(ES)细胞系,来源于129S7(也称129P2/OlaHsd)小鼠品系。由于其强大的体外扩增和遗传操作能力,它在基因打靶和转基因小鼠的产生中发挥了重要作用。AB2.2细胞具有多能性,能够产生所有生殖层,并在产生生殖细胞功能正常的嵌合体方面发挥了重要作用。然而,与许多长期培养的 ES 细胞系一样,AB2.2 也容易出现染色体不稳定,尤其是涉及 8 号染色体的非整倍体。

对 AB2.2 及其子系的细胞遗传学分析表明,染色体异常的频率很高,其中镶嵌型和纯合型 8 三体尤为常见。在一项研究中,AB2.2 的核型为镶嵌型,涉及 8 号和 Y 号染色体的增益,包括 42,XY,+Y,+8 / 41,XY,+Y / 40,XY 等构型。在其子系中,还发现了其他核型异常,如涉及 8 号和 11 号染色体的双三体,以及因涉及 8 号染色体的不平衡易位而产生的复杂衍生染色体。这些结构和数量上的畸变与种系传递效率降低有关,它们的存在使嵌合动物基因型与表型关系的解释变得复杂。

鉴于 AB2.2 的遗传背景和对染色体不稳定性的易感性,AB2.2 仍然是小鼠遗传学的有力工具,但需要仔细的质量控制。建议在进行囊胚注射前进行常规核型筛查(包括 G 带和 FISH),以确保可靠的种系传递和准确的表型分析所需的染色体完整性。

Tissue
胚泡
Applications
干细胞研究

02Classification

Organism
Mouse
Sex
Male
Growth properties
Adherent
Biosafety level
1

03Characteristics

Cell type
胚胎干细胞

04Identifiers

Citation
AB2.2(Cytion 目录号 305738)
NCBI TaxID
10090
Cellosaurus
CVCL_C261

05Handling and culture

Incubation atmosphere

37°C, 5%CO2, 加湿环境。

Seeding density
3至5×10⁴个细胞/平方厘米
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

Donor age
胚胎