CTLA4/IL2 Promoter Reporter/Jurkat
CBP74084
                       
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                | I. Background | |
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				 CTLA4 是一種 T 細胞共受體,也被稱為 CD152。與 CD28 相比,CTLA4 與 B7 家族分 子(包括 CD80 和 CD86)在抗原呈遞細胞(APCs)上具有更強的結(jié)合親和力。盡管 CTLA4 與 B7 共刺激受體結(jié)合,但它在 T 細胞的活化中起負作用。在 T 細胞受體(TCR) 識別 APC 的主要組織相容性復合體(MHC)呈遞的抗原后,T 細胞的 CD28 與 APC 的 B7 結(jié)合,通過阻斷 T 淋巴細胞反應、減少 T 淋巴細胞增殖、抑制 Treg 淋巴細胞活性、減少細 胞因子分泌,導致 T 細胞活化從而抑制免疫反應。  | 
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| II. Description | |
      CTLA4 IL2-Promoter Reporter Jurkat 報告基因藥靶模型很好的模擬了體內(nèi) CTLA4&IL2 的信號轉(zhuǎn)導過程,原理見下圖所示。![]() Figure 1. CTLA4 IL2-Promoter Reporter Jurkat 細胞模型原理圖  | 
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| III. Introduction | |
| Host Cell: | Jurkat | 
| Expressed gene: | IL2 Promoter | 
| Stability: | 32 passages (in-house test, that not means the cell line will be instable beyond the passages we tested.) | 
| Freeze Medium: | 90% FBS+10% DMSO | 
| Culture Medium: | 
				 RPMI-1640+10%FBS+10 μg/ml blasticidin+1 μg/ml puromycin  | 
		
| Mycoplasma Testing: | Negative | 
| Storage: | Liquid nitrogen | 
| Application(s): | Functional(Report Gene) Assay | 
| IV. Description of Host Cell Line | |
| Organism: | Homo sapiens, human | 
| Tissue: | Peripheral blood | 
| Disease: | Childhood T acute lymphoblastic leukemia | 
| Morphology: | Lymphoblast | 
| Growth Properties: | Suspension | 
| Ⅴ. Representative Data | |

Figure 1. Recombinant Jurkat stably expressing human CTLA4.

Figure 2. Dose Response of lpilimumab in CTLA4/IL2 Promoter Reporter-Jurkat Cells (C39) with TCR Activator Cell, the EC50=2.83μg/ml .
            