BETA(3) INTEGRIN DERIVED PEPTIDE-217-230 INHIBITS FIBRINOGEN BIDING AND PLATELET-AGGREGATION - SIGNIFICANCE OF RGD SEQUENCES AND FIBRINOGEN-A ALPHA-CHAIN

被引:22
作者
LASZ, EC
MCLANE, MA
TRYBULEC, M
KOWALSKA, MA
KHAN, S
BUDZYNSKI, AZ
NIEWIAROWSKI, S
机构
[1] TEMPLE UNIV,HLTH SCI CTR,SCH MED,DEPT PHYSIOL,PHILADELPHIA,PA 19140
[2] TEMPLE UNIV,HLTH SCI CTR,SCH MED,DEPT BIOCHEM,PHILADELPHIA,PA 19140
[3] TEMPLE UNIV,HLTH SCI CTR,SCH MED,SOL SHERRY THROMBOSIS RES CTR,PHILADELPHIA,PA 19140
[4] WISTAR INST,PHILADELPHIA,PA 19104
关键词
D O I
10.1006/bbrc.1993.1019
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
β3 integrin derived peptides 217-230 (DAPEGGFDAIMQAT) and 217-231(Y) (DAPEGGFDAIMQATVY) at 100 μM inhibited 125I-fibrinogen binding to ADP-stimulated platelets and platelet aggregation. Peptide 217-231(Y) (100 μM) significantly inhibited the binding of 125I-albolabrin (a disintegrin with a single RGD sequence) to ADP and thrombin-activated platelets while it had only a slight effect on albolabrin binding to resting platelets. The 125I-β3 217-231(Y) cross-linked selectively to the fibrinogen Aα-chain. The interaction of the RGD sequence in the Aα-chain of fibrinogen with β3 217-231 sequence appears to play a significant role in the events leading to platelet aggregation. © 1993 Academic Press, Inc.
引用
收藏
页码:118 / 124
页数:7
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