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PT-67
Tissue
胚胎
Synonyms
RetroPack PT67, PT-67

Documents

PT-67

Cell line · Product number 305483

The PT-67 cell line is a murine retrovirus packaging cell line commonly used for the production of retroviral vectors for gene delivery purposes. Derived ...

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01General information

Description

PT-67细胞系是一种小鼠逆转录病毒包装细胞系,常用于生产用于基因递送的逆转录病毒载体。PT-67源自NIH 3T3细胞,可表达逆转录病毒颗粒组装所需的病毒结构蛋白和包膜蛋白。 值得注意的是,该细胞系经过优化,可生产以10A1小鼠白血病病毒(MLV)包膜蛋白伪型化的载体,这使得载体能够通过多种磷酸盐转运蛋白受体进入细胞,包括长臂猿白血病病毒受体(Glvr-1 或 Pit-1)和广谱受体 Ram-1 (Pit-2)进入细胞。

PT-67 包装细胞的独特之处在于 10A1 包膜蛋白能够同时利用 Glvr-1 和 Ram-1 受体。 这种双受体特异性显著扩大了 PT-67 产生的逆转录病毒载体的宿主范围,使其能够有效转导包括人类、小鼠和大鼠细胞在内的跨物种多种细胞类型。 例如,10A1 伪型逆转录病毒载体可以通过利用这些受体,高效地转导小鼠 NIH 3T3 细胞和人类成纤维细胞。 然而,受体的使用模式具有物种和组织特异性,正如研究中观察到的那样:10A1伪型载体虽然能高效利用Ram-1,但在不同的人类和啮齿类细胞系中,其利用Glvr-1的效率却各不相同。

使用 PT-67 细胞制备的逆转录病毒载体不含辅助病毒,从而确保了基因转移实验的安全性和效率。这使得 PT-67 成为实验和治疗应用中实现稳定基因递送的宝贵工具,特别是在需要广泛宿主范围转导的情况下。 PT-67包装细胞的开发与优化推动了基因治疗领域的进步,使治疗性基因能够以更高的特异性和效率递送至靶细胞。

Tissue
胚胎
Synonyms
  • RetroPack PT67
  • PT-67

02Classification

Organism
Mouse
Sex
Male
Growth properties
Adherent
GMO status
GMO-S1
GMO status details
GMO-S1: This murine NIH-3T3-derived packaging cell line (PT-67) contains a circularly permuted clone of the 10A1 retrovirus delivered via B6 plasmid transfection, supporting production of amphotropic retroviral particles. The inserts are stably present. This classification applies only within Germany and may differ elsewhere.
Biosafety level
2

03Characteristics

Morphology
成纤维细胞
Cell type
成纤维细胞

04Identifiers

Citation
PT-67(Cytion 产品编号 305483)
NCBI TaxID
10090
Cellosaurus
CVCL_9093

05Handling and culture

Culture medium
DMEM,w:4.5 克/升葡萄糖,w:4 毫摩尔 L-谷氨酰胺,w:3.7 克/升 NaHCO3,w:1.0 毫摩尔丙酮酸钠(Cytion 编号 820300a)。
Incubation atmosphere

37°C, 5%CO2, 加湿环境。

Supplements
在培养基中添加 10% FBS
Dissociation reagent
Accutase
Seeding density
2-4×10⁴/cm²
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
未说明