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Cerebellar binding of avian pancreatic polypeptide.

Abstract：

:Studies were carried out to determine the regional central nervous system and species specificity of the previously observed [125I]iodoavian pancreatic polypeptide ( [125I]iodo-APP) specific binding to chick brain membranes. The avian species examined were chicken, pigeon, duck, quail, chukar, and pheasant. In all species, the vast majority (greater than 90%) of APP binding was localized to the area of the cerebellum; other brain regions specifically bound small amounts of APP. Cerebellar hemisphere (folia) regions may have greater specific binding capacities than deep cerebellar nuclei, although all avian cerebellar preparations exhibited affinities for APP on the order of 10(-10) M and binding capacities from approximately 0.2-1.5 pmol/mg protein for the high affinity sites. The measured affinity for binding of APP to these cerebellar binding sites is consistent with normal plasma concentrations (3-6 ng/ml) of APP in all Aves examined. Mammalian (rat and beef) brain membranes, regardless of topographical region, showed low specific binding of [125I]iodo-APP and [125I]iodobovine PP. Preliminary experiments indicate that APP is neither contained in nor released from avian central nervous system synaptosomal elements.

journal_name

Endocrinology

journal_title

Endocrinology

authors

Adamo ML,Hazelwood RL

doi

10.1210/endo-114-3-794

subject

Has Abstract

pub_date

1984-03-01 00:00:00

pages

794-800

issue

3

eissn

0013-7227

issn

1945-7170

journal_volume

114

pub_type

杂志文章

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