【免費(fèi)試用裝】T細(xì)胞激活最佳搭檔 —— CD3/CD28抗體偶聯(lián)磁珠-商家動(dòng)態(tài)-資訊-生物在線

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【免費(fèi)試用裝】T細(xì)胞激活最佳搭檔 —— CD3/CD28抗體偶聯(lián)磁珠

作者:北京百普賽斯生物科技股份有限公司 2022-08-25T11:42 (訪問(wèn)量:14092)


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T淋巴細(xì)胞如何被激活?

在機(jī)體內(nèi),T淋巴細(xì)胞的活化,在免疫應(yīng)答中扮演著相當(dāng)重要的角色,研究表明,誘導(dǎo)T細(xì)胞的活化與增殖需要兩種信號(hào):第一信號(hào)是TCR/CD3與抗原提呈細(xì)胞(APCs)表面特異的MHC分子抗原肽復(fù)合物結(jié)合產(chǎn)生的特異性抗原刺激信號(hào);第二信號(hào)是非特異性的共刺激信號(hào),由APCs表面多對(duì)共刺激分子和T細(xì)胞的相應(yīng)受體相互作用后產(chǎn)生(如:CD28CTLA-4CD80CD86,?4-1BB4-1BBLCD40CD40LPD-1PD-L1等),其中CD28是最為重要的共刺激分子,第二信號(hào)可使T細(xì)胞完全活化,分泌細(xì)胞因子和表達(dá)細(xì)胞因子受體[1], 如果缺乏共刺激信號(hào),第一信號(hào)非但不能有效激活特異性T細(xì)胞,反而導(dǎo)致T細(xì)胞失能[2]而在體外,聯(lián)合使用CD3CD28的抗體刺激T細(xì)胞,模擬體內(nèi)T細(xì)胞活化的雙信號(hào)作用,是目前體外進(jìn)行T細(xì)胞激活與擴(kuò)增應(yīng)用最廣泛的方法[3]

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?Tips:T細(xì)胞在經(jīng)過(guò)第一、第二信號(hào)刺激完全活化后,還有賴于多種細(xì)胞因子(IL-1IL-2IL-4IL-6IL-10IL-12IL-15和IFN-γ等)的作用才能進(jìn)一步增殖活化,如果沒(méi)有細(xì)胞因子,活化T細(xì)胞不能增殖和分化,導(dǎo)致T細(xì)胞的活化后凋亡[2]

>>>點(diǎn)擊了解GMP級(jí)別細(xì)胞因子


細(xì)胞治療領(lǐng)域中T細(xì)胞的激活

CAR-T和TCR-T療法是目前過(guò)繼性免疫細(xì)胞療法的研究熱點(diǎn),無(wú)論是CAR-T還是TCR-T細(xì)胞的體外培養(yǎng),T細(xì)胞都需要被激活后才能進(jìn)行后續(xù)操作步驟,因此合適的T細(xì)胞激活試劑是開(kāi)發(fā)細(xì)胞治療藥物的必需原料,目前市場(chǎng)上體外激活T細(xì)胞的方法主要有:①使用可溶性抗體, 如CD3/CD28抗體聯(lián)合細(xì)胞因子如IL-2等進(jìn)行刺激,但有研究顯示,IL-2濃度過(guò)高的情況下,可能會(huì)導(dǎo)致T細(xì)胞產(chǎn)物耗盡,進(jìn)入功能障礙階段,顯示不良的效應(yīng)功能,并迅速凋亡[4]; ②使用結(jié)合在固相載體上的抗體, 如CD3/CD28抗體偶聯(lián)磁珠,研究顯示,使用抗CD3/CD28抗體包被的磁珠作為人工抗原遞呈顆粒,比用OKT3(抗CD3抗體)/IL-2激活可保留更多的T細(xì)胞記憶表型[5],且由于磁珠可持續(xù)刺激T細(xì)胞,細(xì)胞因子的產(chǎn)生比其他方法(如用OKT3和IL-2激活)高10-100倍,這表明使用磁珠的激活作用更強(qiáng)[6],另外,也有研究表明,與OKT3和IL-2相比,用抗CD3/CD28磁珠激活可以使得T細(xì)胞耗竭更少,療效更加持久[7]
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為支持細(xì)胞治療藥物的開(kāi)發(fā),ACROBiosystems?自主開(kāi)發(fā)了高質(zhì)量的CD3/CD28抗體偶聯(lián)磁珠產(chǎn)品(貨號(hào):MBS-C001,經(jīng)細(xì)胞水平驗(yàn)證,可高效刺激擴(kuò)增T細(xì)胞,更好的助力細(xì)胞治療藥物的開(kāi)發(fā)進(jìn)程。
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產(chǎn)品特色

★?5.5 μm大小,可更好的模擬APC,刺激T細(xì)胞

?磁性強(qiáng),輕松分離,磁珠不易殘留

?超低內(nèi)毒素(< 2EU/mg),對(duì)T細(xì)胞無(wú)傷害

?經(jīng)細(xì)胞水平驗(yàn)證,可高效激活擴(kuò)增T細(xì)胞

掃描下方二維碼免費(fèi)領(lǐng)取試用裝

產(chǎn)品數(shù)據(jù)

??Anti-CD3/CD28 Antibody-coupled Magnetic Beads (Cat. No.?MBS-C001) 可高效激活T細(xì)胞

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The purified human T cells were activated using Anti-CD3/CD28 Antibody-coupled Magnetic Beads (Cat. No.?MBS-C001) at a ratio of 1:1 beads-to-cells for 24 hours with RPMI1640 supplemented with 10% of FBS. The negative control experiment was performed with adding the Negative Control Beads coupled HSA. Cells were fluorescently stained using PE labeled anti-human CD25 antibody and labeled FITC anti-human CD69 antibody and analyzed by flow cytometry.

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???經(jīng)Anti-CD3/CD28 Antibody-coupled Magnetic Beads (Cat. No.?MBS-C001)?刺激后,可對(duì)T細(xì)胞進(jìn)行有效擴(kuò)增

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?The purified human T cells were stimulated using Anti-CD3/CD28 Antibody-coupled Magnetic Beads (Cat. No.?MBS-C001) at a ratio of 1:1 beads-to-cells. Cells were expanded in T cell culture medium supplemented with 4ng/mL of rhIL-2 Protein (Acrobiosystems, Cat. No. IL2-H4113). Activated Cells were expanded for up to 13 days (A) with high cell viability (B).

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競(jìng)品對(duì)比數(shù)據(jù)
?ACRO Anti-CD3/CD28 Antibody-coupled Magnetic Beads (Cat. No.?MBS-C001) 與競(jìng)品分別激活T細(xì)胞,激活能力水平基本一致

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The purified human T cells were activated using ACRO Anti-CD3/CD28 Antibody-coupled Magnetic Beads (Cat. No.?MBS-C001) and competitor’s beads respectively at a ratio of 1:1 beads-to-cells for 24 hours with RPMI1640 supplemented with 10% of FBS. Cells were fluorescently stained using PE labeled anti-human CD25 antibody and labeled FITC anti-human CD69 antibody and analyzed by flow cytometry.

點(diǎn)擊咨詢


與競(jìng)品相比,ACRO Anti-CD3/CD28 Antibody-coupled Magnetic Beads (Cat. No.?MBS-C001),可對(duì)T細(xì)胞進(jìn)行有效擴(kuò)增,且有較高水平的擴(kuò)增能力

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The purified human T cells were stimulated using Anti-CD3/CD28 Antibody-coupled Magnetic Beads (Cat. No.?MBS-C001) and competitor’s beads respectively. Cells were expanded in T cell culture medium supplemented with 4ng/mL of rhIL-2 Protein (Acrobiosystems, Cat. No. IL2-H4113). Activated Cells were expanded for up to 13 days (A) with high cell viability (B).

點(diǎn)擊咨詢

更多T細(xì)胞激活試劑
Anti-CD3 antibody(clone: OKT3Anti-CD28 antibod
GMP級(jí)別細(xì)胞因子

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ACROBiosystems

inquiry@acrobiosystems.com

15117918562

(備注:姓名+公司)

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參考文獻(xiàn)

[1] Kay, J.E., 1991. Mechanisms of T lymphocyteactivation. Immunology Letters 29, 51 – 54

[2] 醫(yī)學(xué)免疫學(xué)-第7版

[3] Trickett A, Kwan YL. T cellstimulation and expansion using anti-CD3/CD28 beads. J Immunol Methods. 2003Apr 1;275(1-2):251-5.

[4] Kalos M, Levine BL, Porter DL, KatzS, Grupp SA, Bagg A, June CH: T cells with chimeric antigen receptors havepotent antitumor effects and can establish memory in patients with advancedleukemia. Sci Transl Med 2011, 3:95ra73.

[5] Hollyman D, Stefanski J, PrzybylowskiM, Bartido S, Borquez- Ojeada O, Taylor C, Yeh R, Capacio V, Olszewska M, HoseyJ et al.: Manufacturing validation of biologically functional T cells targetedto CD19 antigen for autologous adoptive cell therapy. J Immunother 2009, 32:169-180.

[6]Casati A, Varghaei-Nahvi A, FeldmanSA, Assenmacher M, Rosenberg SA, Dudley ME, Scheffold A: Clinical-scaleselection and viral transduction of human na?¨ve and central memory CD8+ T cells for adoptive cell therapy ofcancer patients. Cancer Immunol Immunother 2013, 62:1563-1573.

[7] Barrett DM, Singh N, Liu X, JiangS, June CH, Grupp SA, Zhao Y: Relation of clinical culture method to T-cellmemory status and efficacy in xenograft models of adoptive immunotherapy. Cytotherapy2014, 16:619-630.

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北京百普賽斯生物科技股份有限公司 商家主頁(yè)

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