LYMPHOTOXIN-BETA, A NOVEL MEMBER OF THE TNF FAMILY THAT FORMS A HETEROMERIC COMPLEX WITH LYMPHOTOXIN ON THE CELL-SURFACE

被引:446
作者
BROWNING, JL [1 ]
NGAMEK, A [1 ]
LAWTON, P [1 ]
DEMARINIS, J [1 ]
TIZARD, R [1 ]
CHOW, EPC [1 ]
HESSION, C [1 ]
OBRINEGRECO, B [1 ]
FOLEY, SF [1 ]
WARE, CF [1 ]
机构
[1] UNIV CALIF RIVERSIDE,DIV BIOMED SCI,RIVERSIDE,CA 92521
关键词
D O I
10.1016/0092-8674(93)90574-A
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The lymphokine tumor necrosis factor (TNF) has a well-defined role as an inducer of inflammatory responses; however, the function of the structurally related molecule lymphotoxin (LTalpha) is unknown. LTalpha is present on the surface of activated T, B, and LAK cells as a complex with a 33 kd glycoprotein, and cloning of the cDNA encoding the associated protein, called lymphotoxin beta (LTbeta), revealed it to be a type II membrane protein with significant homology to TNF, LTalpha, and the ligand for the CD40 receptor. The gene for LTbeta was found next to the TNF-LT locus in the major histocompatibility complex (MHC), a region of the MHC with possible linkage to autoimmune disease. These observations raise the possibility that a surface LTalpha-LTbeta complex may have a specific role in immune regulation distinct from the functions ascribed to TNF.
引用
收藏
页码:847 / 856
页数:10
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