Evidence for a placento-insular axis in the rat fetus.

Abstract:

:Rat pups delivered by caesarian section one day before term, either remained attached to (experimental group) or were separated from their placenta (control group). Both groups were transferred into an incubator and their metabolic parameters studied. In the control group, plasma amino acid concentration fell from 11.2 to 6.9 mmol/1, plasma insulin fell from 151 to 45 mu U/ml and blood glucose fell from 3.5 to 2.6 mmol/1 during the first hour of extrauterine life. In the breathing feto-placental units, plasma amino acid concentration remained at its birth level, plasma insulin remained high (109 mu U/ml) causing rapid hypoglycaemia (1.63 mmol/1). An immediately postnatal glucagon and corticosterone surge was visible only in the experimental group. A partially purified placental extract (molecular weight 6000 to 30000) stimulated insulin secretion in vivo (fasted adult rats) and in vitro (isolated neonatal islets). It is concluded that the placenta maintains fetal hyperinsulinaemia by creating fetal hyperaminoacidaemia and, possibly, by secreting a beta cytotropic factor.

journal_name

Diabetologia

journal_title

Diabetologia

authors

Sodoyez-Goffaux F,Sodoyez JC,De Vos CJ

doi

10.1007/BF00252766

subject

Has Abstract

pub_date

1981-05-01 00:00:00

pages

563-7

issue

5

eissn

0012-186X

issn

1432-0428

journal_volume

20

pub_type

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