首页 » HEK293T CAGA12-Luc/TK Renilla BioVector®监测Activin和TGF-β(转化生长因子-β)信号通路的稳定双荧光素酶报告细胞系

HEK293T CAGA12-Luc/TK Renilla BioVector®监测Activin和TGF-β(转化生长因子-β)信号通路的稳定双荧光素酶报告细胞系

  • 价  格:¥998950
  • 货  号:BioVector®HEK293T CAGA12-Luc/TK Renilla
  • 产  地:北京
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BioVector® HEK293T CAGA12-Luc/TK Renilla 是一种专门用于监测 Activin 和 TGF-β(转化生长因子-β)信号通路的稳定双荧光素酶报告细胞系。

以下是该细胞系的技术参数与说明:
1. 基本信息
  • 物种: 人源(Human)。

  • 组织来源: 胚胎肾脏(Fetal Kidney)。

  • 细胞类型: 上皮细胞(贴壁生长)。

  • 生物安全等级: BSL-2。

  • 倍增时间: 约 12–20 小时。

2. 遗传改造与作用机制
该细胞系通过稳定转染整合了两种报告基因,用于精确定量信号转导:
  • 主报告基因 (CAGA12-Luc): 含有 12 个重复的 CAGA 盒(源自 PAI-1 启动子),该序列能特异性结合 Smad3/Smad4 复合物。当 TGF-β 或 Activin 激活信号通路时,细胞会表达萤火虫荧光素酶(Firefly Luciferase)。

  • 内参报告基因 (TK-Renilla): 由组成型 胸苷激酶 (TK) 启动子 驱动,持续表达海肾荧光素酶(Renilla Luciferase)。用于校正细胞数量、活力及实验孔间的误差。

  • 筛选抗性:

    • Puromycin (嘌呤霉素): 用于维持 CAGA12-Luc 的稳定性。

    • Blasticidin (杀稻瘟菌素): 用于维持 TK-Renilla 的稳定性。


3. 培养条件
  • 培养基: DMEM 高糖培养基,添加 10% 胎牛血清 (FBS/FCS)。

    培养环境: 37°C,5% CO2

    • 生长特性: 贴壁生长;在优化条件下倍增时间约为 12–20 小时

    • 生物安全等级:BSL-2

    检测原理 (Assay Mechanism)
    1. 诱导: 当加入 TGF-β 或 Activin 时,Smad3 和 Smad4 结合形成复合物,并结合到 CAGA12 启动子区域。

    2. 表达: 结合后触发萤火虫荧光素酶的表达。

    3. 标准化: 使用双荧光素酶报告基因检测系统同时读取两种信号。通过萤火虫荧光素酶与海肾荧光素酶的比值,可以消除细胞活力、接种误差以及非特异性药物反应带来的干扰。

  • The CAGA box is a TGFβ-inducible DNA element. (A) In the human PAI-1 promoter, two regions, depicted by black bars, have been described to respond to TGFβ. The sequences of the three CAGA boxes found in this promoter are given. (B) HepG2 cells were transfected with different vectors containing nine copies of the CAGA sequence cloned upstream of the HSV1-Thymidine kinase promoter (TK). AGCCAGACA is the sequence found at position-730 in the PAI-1 promoter and AGACAGACA is the sequence of the two other CAGA boxes of the PAI-1 promoter (positions-580 and-280). The last construct contains mutated CAGA boxes on 3 bp as indicated. Luciferase activities are shown and fold inductions by TGFβ are indicated. (C) HepG2 and Mv1Lu cells were transfected with p3TP-Lux or a vector containing nine or 12 copies of the CAGA box upstream of the minimal Adenovirus MLP. Fold inductions by TGFβ are given for HepG2 cells. Basal and TGFβ-induced luciferase levels are shown for Mv1Lu-transfected cells.



  • The BioVector® HEK293T CAGA12-Luc/TK Renilla cell line (Catalog #: 156438) is a specialized reporter cell line designed to monitor Activin and TGF-beta (TGF-β) signaling. It utilizes a dual-reporter system for high-sensitivity measurements and internal normalization.
    Core Specifications
    • Host Cell Line:HEK293T (Human Embryonic Kidney), an adherent line known for high transfection efficiency.

    • Reporter 1 (Inducible):CAGA12-Luc. A Smad3/Smad4-dependent Firefly luciferase reporter containing 12 copies of the CAGA box (AGAC motif) from the PAI-1 promoter. It responds to Activin and TGF-β signaling.

    • Reporter 2 (Constitutive):TK Renilla. A Renilla luciferase reporter driven by the thymidine kinase (TK) promoter, used as an internal control for normalization.

    • Selection Markers:Puromycin (conferred by pRetroSuper) and Blasticidin (conferred by pCMV-Bsd).

    • Application: Monitoring of Smad-dependent signal transduction pathways and screening for TGF-β/Activin pathway agonists or antagonists.

    Culture Conditions
    • Growth Medium: Dulbecco's Modified Eagle's Medium (DMEM) supplemented with 10% Fetal Calf Serum (FCS).

    • Storage: 1x10^6 cells/vial, typically stored in liquid nitrogen vapor phase for long-term stability.

    • Growth Characteristics: Adherent; doubling time is approximately 12–20 hours under optimal conditions.

    • Biosafety Level:BSL-2.

    Assay Performance
    • Mechanism: In the presence of Activin or TGF-β ligands, Smad3/4 complexes bind to the CAGA12 promoter, triggering the expression of Firefly luciferase.

    • Normalization: The Renilla luciferase signal provides a baseline for cell viability and transfection efficiency, allowing for "dual-luciferase" normalization.

    • Sensitivity: Capable of detecting minute moles of reporter protein with a linear range extending over 7 logs.

    BioVector NTCC质粒载体菌株细胞蛋白抗体基因保藏中心

    E-mail:biovector@163.com

    电话:400-800-2947

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    BioVector NTCC质粒载体菌株细胞蛋白抗体基因保藏中心

    E-mail:biovector@163.com

    电话:400-800-2947

    工作QQ/微信同号:1843439339

    网址 www.biovector.net

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