Effect of thyroid status on the development of the different molecular forms of Na+,K+-ATPase in rat brain.

Abstract:

:The effect of thyroid status on the postnatal development of the two molecular forms of Na+,K+-ATPase, distinguished kinetically on the basis of their ouabain sensitivity, was examined in rat brain. Hypothyroidism induced by PTU from day 1 postnatally significantly reduced the Na+,K+-ATPase activity in cerebellum (22-30 days) but not forebrain, whereas hyperthyroidism (T4 treatment from day 1) had no effect. The hypothyroidism-induced reduction in cerebellum was reflected by a 20-45% reduction in the activity of the alpha(+) form of Na+,K+-ATPase (high ouabain affinity) against control brains compared to a 60-70% reduction in the activity of the alpha form (low ouabain affinity). These results show that neonatally induced hypothyroidism leads to a selectively greater impairment of the ontogenesis of the activity of cerebellar alpha form of Na+,K+-ATPase. This may possibly reflect a retarded development of a selective cerebellar cell population containing predominantly the alpha form of the enzyme.

journal_name

Mol Cell Endocrinol

authors

Atterwill CK,Reid J,Athayde CM

doi

10.1016/0303-7207(85)90170-4

subject

Has Abstract

pub_date

1985-05-01 00:00:00

pages

149-58

issue

2-3

eissn

0303-7207

issn

1872-8057

journal_volume

40

pub_type

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