Angiotensin II analogues with N-terminal lactam bridge cyclization: an overview on AT1 receptor activation and tachyphylaxis.
Chem Biol Drug Des
; 88(5): 677-682, 2016 11.
Article
em En
| MEDLINE
| ID: mdl-27230954
ABSTRACT
Angiotensin II (AngII) is the final active product of the renin enzymatic cascade, which is responsible for sustaining blood pressure. To investigate the effect of N-terminal cyclization on AT1 activation and tachyphylaxis, we designed conformationally constrained analogues with an i-(i + 1) lactam bridge. All analogues presented the same binding coefficient and tachyphylactic index, but some of them such as Cyclo (0-1a) [Glu0 , endo-(Lys1a )]-AngII and Cyclo (0-1a) [Asp0 , endo-(Orn1a )]-AngII showed higher potency. The same tachyphylactic index presented by AngII and cyclic analogues was surprising. We expected a variation after the modification of AngII N-terminal region.
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Base de dados:
MEDLINE
Assunto principal:
Angiotensina II
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Receptor Tipo 1 de Angiotensina
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Lactamas
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article