The RMP1-14 monoclonal antibody reacts with mouse PD-1 (programmed death-1) also known as CD279. PD-1 is a 50-55 kDa cell surface receptor encoded by the Pdcd1 gene that belongs to the CD28 family of the Ig superfamily. PD-1 is transiently expressed on CD4 ａnd CD8 thymocytes as well as activated T ａnd B lymphocytes ａnd myeloid cells. PD-1 expression declines after successful elimination of antigen. Additionally, Pdcd1 mRNA is expressed in developing B lymphocytes during the pro-B-cell stage. PD-1’s structure includes a ITIM (immunoreceptor tyrosine-based inhibitory motif) suggesting that PD-1 negatively regulates TCR signals. PD-1 signals via binding its two ligands, PD-L1 ａnd PD-L2 both members of the B7 family. Upon ligand binding, PD-1 signaling inhibits T-cell activation, leading to reduced proliferation, cytokine production, ａnd T-cell death. Additionally, PD-1 is known to play key roles in peripheral tolerance ａnd prevention of autoimmune disease in mice as PD-1 knockout animals show dilated cardiomyopathy, splenomegaly, ａnd loss of peripheral tolerance. Induced PD-L1 expression is common in many tumors including squamous cell carcinoma, colon adenocarcinoma, ａnd breast adenocarcinoma. PD-L1 overexpression results in increased resistance of tumor cells to CD8 T cell mediated lysis. In mouse models of melanoma, tumor growth can be transiently arrested via treatment with antibodies which block the interaction between PD-L1 ａnd its receptor PD-1. For these reasons anti-PD-1 mediated immunotherapies are currently being explored as cancer treatments. Like the J43 antibody the RMP1-14 antibody has been shown to block the binding of both mouse PD-L1-Ig ａnd mouse PD-L2-Ig to PD-1.

RMP1-14單克隆抗體與小鼠PD-1（程序性死亡-1）反應(yīng)，也稱為CD279。PD-1是由Pdcd50基因編碼的55-1 kDa細(xì)胞表面受體，屬于Ig超家族的CD28家族。PD-1在CD4和CD8胸腺細(xì)胞以及活化的T和B淋巴細(xì)胞和骨髓細(xì)胞上短暫表達(dá)。PD-1在成功消除抗原后表達(dá)下降。此外，Pdcd1 mRNA在B細(xì)胞階段的發(fā)育B淋巴細(xì)胞中表達(dá)。PD-1的結(jié)構(gòu)包括ITIM（基于免疫受體酪氨酸的抑制基序），表明PD-1負(fù)調(diào)節(jié)TCR信號。PD-1通過結(jié)合其兩個(gè)配體PD-L1和PD-L2來發(fā)出信號，PD-L7和PD-L1都是B1家族的成員。配體結(jié)合后，PD-1信號傳導(dǎo)抑制T細(xì)胞活化，導(dǎo)致增殖減少，細(xì)胞因子產(chǎn)生和T細(xì)胞死亡。

此外，已知PD-1在小鼠外周耐受和預(yù)防自身免疫性疾病中起關(guān)鍵作用，因?yàn)镻D-1基因敲除動(dòng)物表現(xiàn)出擴(kuò)張型心肌病，脾腫大和外周耐受性喪失。誘導(dǎo)PD-L8表達(dá)在許多腫瘤中很常見，包括鱗狀細(xì)胞癌、結(jié)腸腺癌和乳腺腺癌。PD-L1過表達(dá)導(dǎo)致腫瘤細(xì)胞對CD1 T細(xì)胞介導(dǎo)的裂解的耐藥性增加。在黑色素瘤小鼠模型中，腫瘤生長可以通過阻斷PD-L1與其受體PD-43之間相互作用的抗體治療來暫時(shí)阻止。由于這些原因，目正在探索抗PD-1介導(dǎo)的免疫療法作為癌癥治療方法。與J14抗體一樣，RMP1-2抗體已被證明可以阻斷小鼠PD-L1-Ig和小鼠PD-L<>-Ig與PD-<>的結(jié)合。

艾美捷體內(nèi)小鼠PD-1抗體#BE0146詳細(xì)信息：

同種型 大鼠IgG2a， κ

推薦的同種型對照 體內(nèi)MAb大鼠IgG2a同種型對照，抗三硝基苯酚

推薦的稀釋緩沖液 體內(nèi)純 pH 7.0 稀釋緩沖液

免疫原 用小鼠PD-1 cDNA轉(zhuǎn)染的敘利亞倉鼠BKH細(xì)胞

應(yīng)用程序 PD-1/PD-L信號傳導(dǎo)的體內(nèi)阻斷

配方 PBS，pH 7.0

不含穩(wěn)定劑或防腐劑

內(nèi)毒素 <2EU/mg （<0.002EU/μg）

通過LAL凝膠凝血測定法測定

純度 >95%

由 SDS-PAGE 決定

無 菌 0.2 μM 過濾

生產(chǎn) 從無動(dòng)物設(shè)施中的組織培養(yǎng)上清液中純化

純化 蛋白 G

里德 AB_10949053

分子量 150 千達(dá)

存儲(chǔ) 抗體溶液應(yīng)以4°C的儲(chǔ)備濃度儲(chǔ)存。 不要凍結(jié)。

體內(nèi)小鼠PD-1抗體部分文獻(xiàn)參考：

in vivo blocking of PD-1/PD-L signaling

Ngiow, S. F., et al. (2015). "A Threshold Level of Intratumor CD8+ T-cell PD1 Expression Dictates Therapeutic Response to Anti-PD1" Cancer Res 75(18): 3800-3811.

in vivo blocking of PD-1/PD-L signaling

Evans, E. E., et al. (2015). "Antibody Blockade of Semaphorin 4D Promotes Immune Infiltration into Tumor ａnd Enhances Response to Other Immunomodulatory Therapies" Cancer Immunol Res 3(6): 689-701.

in vivo blocking of PD-1/PD-L signaling

Zelenay, S., et al. (2015). "Cyclooxygenase-Dependent Tumor Growth through Evasion of Immunity" Cell 162(6): 1257-1270.