Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors.

Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors. Research Abstract Details 

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Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors. Abstract Text:

C A Frye,K Sumida,B C Dudek,J P Harney,J P Lydon,B W O'Malley,D W Pfaff,M E Rhodes,

RATIONALE: Aging is associated with reduced secretion of, and down-regulation of receptors for, progesterone (P); yet, P's effects when administered to younger and older animals have not been systematically investigated. Some of P's antianxiety effects may be due to its conversion to 3alpha-hydroxy-5alpha-pregnan-20-one (3alpha,5alpha-THP) and its subsequent actions as a positive modulator at GABAA receptor complexes (GBRs). OBJECTIVES: We investigated whether P administration can decrease anxiety behavior of progestin receptor (PR) knockout (PRKO) or wild-type control mice. METHODS: P (10 mg/kg) or vehicle (propylene glycol) were administered subcutaneously to intact, female or male wild-type or PRKO mice that were either 9-12 or 18-24 months of age. Behavior in tasks that assess spontaneous activity (activity monitor and roto-rod), free exploration of a novel environment (open field, elevated plus maze, and elevated zero maze), and conflict behavior (mirror chamber, dark-light transition, and punished drinking) were examined 1 h after injection. RESULTS: P significantly decreased anxiety behavior of both PRKO and wild-type mice. P did not alter motor behavior but increased central entries in the open field, time in the open quadrants of the elevated zero maze, time in the mirrored chamber, time in the light compartment of the dark-light transition, and punished drinking in young and old mice. P-administered mice had higher levels of hippocampal 3alpha,5alpha-THP and GABA-stimulated chloride flux than did vehicle-administered PRKO or wild-type mice. CONCLUSIONS: The effects of P to decrease anxiety behavior of younger and older mice do not require classic PRs and may involve actions of 3alpha,5alpha-THP at GBRs.

Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors. Publishing Authors By Initials

CA Frye,K Sumida,BC Dudek,JP Harney,JP Lydon,BW O'Malley,DW Pfaff,ME Rhodes,

For similar organic chemicals: carboxylic acids: acids, acyclic: butyric acids: aminobutyric acids: gamma-aminobutyric acid research abstracts see: organic chemicals: carboxylic acids: acids, acyclic: butyric acids: aminobutyric acids: gamma-aminobutyric acid research

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Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Psychopharmacology

VOLUME: 186

Page Numbers: 312-22

Journal Abbreviation: Psychopharmacology (Berl.)

ISSN: 0033-3158

DAY: 15

MONTH: 03

YEAR: 2006

Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 7608025

Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors. Keywords Mesh Terms:

KEYWORDS: gamma-Aminobutyric Acid

MESH TERMS: pharmacology

Chemical & Substance for Abstract: Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors. Information

Substance Name: Progesterone

Registry Number: 57-83-0

Grant and Affiliation Information for Progesterone's effects to reduce anxiety behavior of aged mice do not require actions via intracellular progestin receptors.

AFFILIATION: Department of Psychology, The University at Albany, SUNY, Albany, NY 12222, USA. cafrye@albany.edu

Country: Germany

AGENCY: United States NIMH

GRANT: MH06769801

ACRONYM: MH

MEDLINETA: Psychopharmacology (Berl)

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