Synthesis, conformational studies and biological activities of VIP and related fragments.

Abstract:

:VIP and related fragments were prepared by the solid-phase method. The peptides were assembled on a benzhydrylamine resin and couplings of the Boc-amino acids were carried out by the symmetrical anhydride method. Cleavage was achieved by treatment with liquid HF and purification was accomplished by successive steps of cation exchange, partition and semi-preparative high pressure liquid chromatography. The biological activities were evaluated in vitro in the rabbit perfused heart and in vivo on the rat blood pressure. Structural studies were performed by high resolution (400 MHz) 1H-NMR spectroscopy and circular dichroism. The results show that among all the fragments tested, only VIP2-28 retains significant biological activity. The fragments 1-14 and 15-28, which are devoid of activity, were found to be inactive as antagonists. VIP and some of the fragments tend to adopt the helical structure, as demonstrated by spectroscopic techniques.

journal_name

Peptides

journal_title

Peptides

authors

Fournier A,Saunders JK,St-Pierre S

doi

10.1016/0196-9781(84)90202-x

subject

Has Abstract

pub_date

1984-03-01 00:00:00

pages

169-77

issue

2

eissn

0196-9781

issn

1873-5169

pii

0196-9781(84)90202-X

journal_volume

5

pub_type

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