Toxins from Physalia physalis (Cnidaria) raise the intracellular Ca(2+) of beta-cells and promote insulin secretion.

Abstract:

:Physalia physalis is a marine cnidarian from which high molecular weight toxins with hemolytic and neurotoxic effects have been isolated. In the present work, two novel toxins, PpV9.4 and PpV19.3 were purified from P. physalis by bioactive guideline isolation. It involved two steps of column chromatography, gel filtration and RP-HPLC. The molecular weights were 550.7 and 4720.9 Da for PpV9.4 and PpV19.3, respectively. In the light of the Edman sequencing results, the structure of these toxins included the presence of modified amino acids. Both toxins increased the percentage of insulin secreting beta-cells and induced cytosolic Ca2+ elevation. To date, this is the first report of low molecular weight toxins increasing insulin secretion purified from cnidarians, by constituting a new approach to the study of beta-cells physiology.

journal_name

Curr Med Chem

authors

Diaz-Garcia CM,Fuentes-Silva D,Sanchez-Soto C,Domínguez-Pérez D,García-Delgado N,Varela C,Mendoza-Hernández G,Rodriguez-Romero A,Castaneda O,Hiriart M

doi

10.2174/092986712803833308

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

5414-23

issue

31

eissn

0929-8673

issn

1875-533X

pii

CMC-EPUB-20120724-9

journal_volume

19

pub_type

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