Functional and Molecular Aspects of Human T Lymphocyte Activation via T3‐Ti and Tl1 Pathways

Functional and Molecular Aspects of Human T Lymphocyte Activation via T3‐Ti and Tl1 Pathways
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通过 T3-Ti 和 Tl1 途径激活人 T 淋巴细胞的功能和分子方面

DOI:
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发表时间:
1987
期刊:
影响因子:
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通讯作者:
E. Reinherz
E. Reinherz
中科院分区:
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文献类型:
--
作者:
A. Alcover;D. Ramarli;N. Richardson;Hsiu;E. Reinherz

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人类T细胞上存在两种激活淋巴细胞的途径。第一个涉及T淋巴细胞抗原受体(T3-Ti),它与MHC复合体的基因产物结合工作,是一个由5个多肽链组成的分子复合体。49KD的α链和43KD的β链都是免疫球蛋白样链,因此含有负责配体结合的可变区。相反,20-25KD的T3伽马链、三角链和epsilon链是单态结构,可能参与跨膜信号转导。α和β亚基相互二硫键,并与T3链保持非共价结合。第二条途径涉及50KD的T11绵羊红细胞结合蛋白。T11途径在胸腺内个体发育的早期是可操作的,在T3-Ti受体表达之前。在生理条件下,T_3-T_1和T_(11)通路似乎与T_(11)串联起作用,呈现出更接近“核”的结构。然而,每一种途径都是相互独立的,它们都可以激活磷酸肌醇的级联反应,导致胞浆游离钙的升高。后者对于内源性IL-2基因的转录激活至关重要。参考其在胸腺选择中的可能作用,讨论了T3-钛复合体调节T11介导的激活的能力。
Two pathways of human lymphocyte activation are known to exist on T-lineage cells. The first involves the T-lymphocyte receptor for antigen (T3-Ti) which operates in conjunction with gene products of the MHC complex and is a molecular complex composed of 5 polypeptide chains. Both the 49KD alpha and 43KD beta chains are immunoglobulin-like and thus contain variable domains responsible for ligand binding. In contrast, the 20-25KD T3 gamma, delta and epsilon chains are monomorphic structures presumably involved in transmembrane signalling. The alpha and beta subunits are disulfide bonded to each other and held in noncovalent association with the T3 chains. The second pathway involves the 50KD T11 sheep erythrocyte binding protein. The T11 pathway is operational during early intrathymic ontogeny, prior to T3-Ti receptor expression. Under physiologic conditions, T3-Ti and T11 pathways appear to function in series with T11, representing a more "nuclear proximal" structure. However, each pathway, independently of the other, can activate the phosphoinositol cascade and lead to elevation in cytosolic free calcium. The latter is critical for transcriptional activation of the endogenous IL-2 gene. The ability of the T3-Ti complex to regulate T11-mediated activation is discussed with reference to its possible role in thymic selection.
抗 T3 单克隆抗体调节 T 细胞激活的替代途径。
DOI: --
发表时间: 1986
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Fox,DA;Schlossman,SF;Reinherz,EL
通讯作者: Reinherz,EL
人类 T 细胞激活的抗原特异性 (T3-Ti) 和替代 (T11) 途径的钙依赖性。
DOI: 10.1073/pnas.81.21.6836
发表时间: 1984
影响因子: 11.1
作者:
Weiss,MJ;Daley,JF;Hodgdon,JC;Reinherz,EL
通讯作者: Reinherz,EL
人类 T 细胞克隆个体上 T3 相关 49 道尔顿和 43 道尔顿细胞表面分子的比较:T 细胞受体结构中肽变异性的证据。
DOI: 10.1073/pnas.80.13.4104
发表时间: 1983
影响因子: 11.1
作者:
Reinherz,EL;Meuer,SC;Fitzgerald,KA;Hussey,RE;Hodgdon,JC;Acuto,O;Schlossman,SF
通讯作者: Schlossman,SF
HTLV-II 的反式激活基因诱导 IL-2 受体和 IL-2 细胞基因表达。
DOI: 10.1126/science.3010456
发表时间: 1986
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Greene,WC;Leonard,WJ;Wano,Y;Svetlik,PB;Peffer,NJ;Sodroski,JG;Rosen,CA;Goh,WC;Haseltine,WA
通讯作者: Haseltine,WA
刺激 T3-T 细胞受体相关的 Ca2 流入可增强白血病人 T 细胞系中 Na /H 交换器的活性。
DOI: --
发表时间: 1985
期刊: The Journal of biological chemistry
影响因子: --
作者:
Rosoff,PM;Cantley,LC
通讯作者: Cantley,LC