PREPARATION OF MONOCLONAL-ANTIBODIES AGAINST BRAIN NATRIURETIC PEPTIDE AND THEIR APPLICATION TO RADIOIMMUNOASSAY AND PASSIVE-IMMUNIZATION

被引:4
作者
ITOH, H [1 ]
NAKAO, K [1 ]
MUKOYAMA, M [1 ]
SAITO, Y [1 ]
YAMADA, T [1 ]
SHIRAKAMI, G [1 ]
ARAI, H [1 ]
HOSODA, K [1 ]
SUGA, S [1 ]
YOSHIDA, I [1 ]
IMURA, H [1 ]
机构
[1] KYOTO UNIV,SCH MED,DEPT MED,DIV 2,54 SHOGOIN KAWAHARA CHO,SAKYO KU,KYOTO 606,JAPAN
关键词
D O I
10.1210/endo-127-3-1292
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Two monoclonal antibodies (mAbs) directed toward brain natriuretic peptide (BNP), KY-BNP-I and KYBNP- II, have been produced. Both mAbs against BNP possessed high affinities for BNP, with association constants (Ka) of 4.0 x 109M-1(KY-BNP-I) and 2.0 x 1010M-1(KY-BNP-II). With these mAbs, specific RIAs for BNP have been established. The least detectable quantities of BNP were 5 pg/tube (KY-BNP-I) and 1 pg/tube (KY-BNP-II). Cross-reactivities of α-human and rat atrial natriuretic polypeptides were less than 0.001%. These RIAs detected BNP-like immunoreactivity (BNP-LI) not only in the porcine brain but also in the canine brain, with the highest concentration in the medulla oblongata. These RIAs also detected BNP-LI in both the porcine and canine hearts and in the porcine plasma. The iv pretreatment of purified mAb[KY-BNPII] almost completely blocked the hypotensive action of iv administered BNP in rats, with the concomitant suppression of BNP-induced increase of the plasma cyclic GMP level. These results indicate that our mAbs against BNP will serve as a useful tool for the elucidation of the physiological and pathophysiological significance of BNP as a neuropeptide and as a hormone. © 1990 by The Endocrine Society.
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页码:1292 / 1300
页数:9
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