SIRPɑ Effector Reporter Cell
CBP74122
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I. Background | |
SIRPα(Signal Regulatory Protein α)是一種免疫球蛋白超家族跨膜蛋白,主要表達于 髓系細胞(如巨噬細胞、樹(shù)突狀細胞)表面,其胞外區含三個(gè) Ig 樣結構域(D1、D2、 D3),其中 D1 結構域特異性結合 CD47;胞內段含免疫受體酪氨酸抑制基序(ITIM), 可招募 SHP-1/SHP-2 磷酸酶傳遞抑制信號。SIRPα通過(guò)調控吞噬活性維持自身免疫耐受, 防止巨噬細胞誤傷正常細胞。
CD47 是一種五次跨膜蛋白,廣泛表達于紅細胞、血小板及腫瘤細胞表面,其胞外 N 端 IgV 樣結構域與 SIRPα結合,被稱(chēng)為“別吃我”(Don’t eat me)信號分子,在紅細胞穩 態(tài)(防止脾臟巨噬細胞清除年輕紅細胞)及腫瘤免疫逃逸中起關(guān)鍵作用。 當 CD47 結合 SIRPα后,SIRPα胞內 ITIM 基序被磷酸化,招募 SHP-1/SHP-2 磷酸酶, 通過(guò)去磷酸化作用抑制下游促吞噬信號。 |
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II. Description | |
SIRPα Effector Reporter Cell 報告基因藥靶模型很好的模擬了體內 SIRPα的信號轉導過(guò)程,原理見(jiàn)下圖所示。
![]() Figure 1. SIRPα Effector Reporter Cell 模型原理圖
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III. Introduction | |
Expressed gene: | SIRPɑ |
Stability: | 32 passages (in-house test, that not means the cell line will be instable beyond the passages we tested.) |
Synonym(s): | SIRP alpha protein, sirpa protein, sirp-a protein, SIRPα, CD172a, Tyrosine-protein phosphatase non-receptor type substrate 1, CD172a, Bit, and MyD-1, 71138-1, 71138-2 |
Freeze Medium: | 90% FBS+10% DMSO |
Culture Medium: |
RPMI-1640+10%FBS+1 μg/ml Puromycin+300 μg/ml Hygromycin B
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Mycoplasma Testing: | Negative |
Storage: | Liquid nitrogen |
Application(s): | Functional(Report Gene) Assay |
IV. Representative Data |
Figure 2. Dose response of SIRPɑ Blocking Antibodies in SIRPɑ Effector Reporter Cell(C11) With CD47+ Target Cell. Dose response of CD47 Blocking Antibody in SIRPɑ Effector Reporter Cell(C11) With CD47+ Target Cell.