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Hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks

Altered gravity load induced by spaceflight (microgravity) and centrifugation (hypergravity) is associated with changes in circadian, metabolic, and reproductive systems. Exposure to 2-g hypergravity (HG) during pregnancy and lactation decreased rate of mammary metabolic activity and increased pup m...

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Autores principales: Casey, Theresa, Zakrzewska, Elzbieta I., Maple, Rhonda L., Lintault, Laura, Wade, Charles E., Baer, Lisa A., Ronca, April E., Plaut, Karen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Company of Biologists 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3509447/
https://www.ncbi.nlm.nih.gov/pubmed/23213450
http://dx.doi.org/10.1242/bio.2012687
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author Casey, Theresa
Zakrzewska, Elzbieta I.
Maple, Rhonda L.
Lintault, Laura
Wade, Charles E.
Baer, Lisa A.
Ronca, April E.
Plaut, Karen
author_facet Casey, Theresa
Zakrzewska, Elzbieta I.
Maple, Rhonda L.
Lintault, Laura
Wade, Charles E.
Baer, Lisa A.
Ronca, April E.
Plaut, Karen
author_sort Casey, Theresa
collection PubMed
description Altered gravity load induced by spaceflight (microgravity) and centrifugation (hypergravity) is associated with changes in circadian, metabolic, and reproductive systems. Exposure to 2-g hypergravity (HG) during pregnancy and lactation decreased rate of mammary metabolic activity and increased pup mortality. We hypothesize HG disrupted maternal homeorhetic responses to pregnancy and lactation are due to changes in maternal metabolism, hormone concentrations, and maternal behavior related to gravity induced alterations in circadian clocks. Effect of HG exposure on mammary, liver and adipose tissue metabolism, plasma hormones and maternal behavior were analyzed in rat dams from mid-pregnancy (Gestational day [G]11) through early lactation (Postnatal day [P]3); comparisons were made across five time-points: G20, G21, P0 (labor and delivery), P1 and P3. Blood, mammary, liver, and adipose tissue were collected for analyzing plasma hormones, glucose oxidation to CO(2) and incorporation into lipids, or gene expression. Maternal behavioral phenotyping was conducted using time-lapse videographic analyses. Dam and fetal-pup body mass were significantly reduced in HG in all age groups. HG did not affect labor and delivery; however, HG pups experienced a greater rate of mortality. PRL, corticosterone, and insulin levels and receptor genes were altered by HG. Mammary, liver and adipose tissue metabolism and expression of genes that regulate lipid metabolism were altered by HG exposure. Exposure to HG significantly changed expression of core clock genes in mammary and liver and circadian rhythms of maternal behavior. Gravity load alterations in dam's circadian system may have impacted homeorhetic adaptations needed for a successful lactation.
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spelling pubmed-35094472012-12-04 Hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks Casey, Theresa Zakrzewska, Elzbieta I. Maple, Rhonda L. Lintault, Laura Wade, Charles E. Baer, Lisa A. Ronca, April E. Plaut, Karen Biol Open Research Article Altered gravity load induced by spaceflight (microgravity) and centrifugation (hypergravity) is associated with changes in circadian, metabolic, and reproductive systems. Exposure to 2-g hypergravity (HG) during pregnancy and lactation decreased rate of mammary metabolic activity and increased pup mortality. We hypothesize HG disrupted maternal homeorhetic responses to pregnancy and lactation are due to changes in maternal metabolism, hormone concentrations, and maternal behavior related to gravity induced alterations in circadian clocks. Effect of HG exposure on mammary, liver and adipose tissue metabolism, plasma hormones and maternal behavior were analyzed in rat dams from mid-pregnancy (Gestational day [G]11) through early lactation (Postnatal day [P]3); comparisons were made across five time-points: G20, G21, P0 (labor and delivery), P1 and P3. Blood, mammary, liver, and adipose tissue were collected for analyzing plasma hormones, glucose oxidation to CO(2) and incorporation into lipids, or gene expression. Maternal behavioral phenotyping was conducted using time-lapse videographic analyses. Dam and fetal-pup body mass were significantly reduced in HG in all age groups. HG did not affect labor and delivery; however, HG pups experienced a greater rate of mortality. PRL, corticosterone, and insulin levels and receptor genes were altered by HG. Mammary, liver and adipose tissue metabolism and expression of genes that regulate lipid metabolism were altered by HG exposure. Exposure to HG significantly changed expression of core clock genes in mammary and liver and circadian rhythms of maternal behavior. Gravity load alterations in dam's circadian system may have impacted homeorhetic adaptations needed for a successful lactation. The Company of Biologists 2012-04-30 /pmc/articles/PMC3509447/ /pubmed/23213450 http://dx.doi.org/10.1242/bio.2012687 Text en © 2012. Published by The Company of Biologists Ltd http://creativecommons.org/licenses/by-nc-sa/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial Share Alike License (http://creativecommons.org/licenses/by-nc-sa/3.0/).
spellingShingle Research Article
Casey, Theresa
Zakrzewska, Elzbieta I.
Maple, Rhonda L.
Lintault, Laura
Wade, Charles E.
Baer, Lisa A.
Ronca, April E.
Plaut, Karen
Hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks
title Hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks
title_full Hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks
title_fullStr Hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks
title_full_unstemmed Hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks
title_short Hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks
title_sort hypergravity disruption of homeorhetic adaptations to lactation in rat dams include changes in circadian clocks
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3509447/
https://www.ncbi.nlm.nih.gov/pubmed/23213450
http://dx.doi.org/10.1242/bio.2012687
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