Endogenous digitalis-like activity in the newborn.

Abstract:

:Elevated levels of endogenous digoxin-like immunoreactivity have been reported in the body fluids of premature and full-term infants as well as in term pregnancy, in the amniotic fluid, and in human milk. Several lines of evidence suggest that these factors could also have biological properties in common with digitalis: i.e., they could represent truly endogenous digitalis-like factor(s). In recent years we succeeded in partially purifying this factor from umbilical cord blood, which represents an easily available source of this factor. The inhibitory activity of this factor on 86Rb uptake could be neutralized by antidigoxin antibodies (Fab fragments) and provided, for the first time, direct evidence of an association between digoxin-like immunoreactivity and biological digitalis-like activity. In addition, these antibodies could be used for immunoaffine chromatography as a purification step before separation by high-performance liquid chromatography. Preliminary experiments suggest that this endogenous compound has both a tissue and an isoenzyme selectivity and is not a well-known steroid (testosterone, progesterone, 17-OH progesterone, cortisol, dehydroepiandrosterone sulfate, and estradiol).

journal_name

J Cardiovasc Pharmacol

authors

Ghione S,Balzan S,Decollogne S,Paci A,Pieraccini L,Montali U

doi

10.1097/00005344-199322002-00010

subject

Has Abstract

pub_date

1993-01-01 00:00:00

pages

S25-8

eissn

0160-2446

issn

1533-4023

journal_volume

22 Suppl 2

pub_type

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