A longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.

<h4>Background</h4>Early gestation represents a period of vulnerability to environmental insult that has been associated with adult psychiatric disease. However, little is known about how prenatal perturbation translates into adult brain dysfunction. Here, we use a longitudinal study des...

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Autores principales:	Kristina Aldridge, Lei Wang, Michael P Harms, Amanda J Moffitt, Kimberly K Cole, John G Csernansky, Lynn D Selemon
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1874739b95ac432cb786422eeee21bc2
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spelling	oai:doaj.org-article:1874739b95ac432cb786422eeee21bc22021-11-18T07:08:49ZA longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.1932-620310.1371/journal.pone.0043109https://doaj.org/article/1874739b95ac432cb786422eeee21bc22012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22905212/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Early gestation represents a period of vulnerability to environmental insult that has been associated with adult psychiatric disease. However, little is known about how prenatal perturbation translates into adult brain dysfunction. Here, we use a longitudinal study design to examine the effects of disruption of early gestational neurogenesis on brain volume in the non-human primate.<h4>Methods and principal findings</h4>Five Rhesus macaques were exposed to x-irradiation in early gestation (E30-E41), and four control monkeys were sham-irradiated at comparable ages. Whole brain magnetic resonance imaging was performed at 6 months, 12 months, and 3 and 5 years of age. Volumes of whole cerebrum, cortical gray matter, caudate, putamen, and thalamus were estimated using semi-automated segmentation methods and high dimensional brain mapping. Volume reductions spanning all ages were observed in irradiated monkeys in the putamen (15-24%, p = 0.01) and in cortical gray matter (6-15%, p = 0.01). Upon covarying for whole cerebral volume, group differences were reduced to trend levels (putamen: p = 0.07; cortical gray matter: p = 0.08). No group-by-age effects were significant.<h4>Conclusions</h4>Due to the small number of observations, the conclusions drawn from this study must be viewed as tentative. Early gestational irradiation may result in non-uniform reduction of gray matter, mainly affecting the putamen and cerebral cortex. This may be relevant to understanding how early prenatal environmental insult could lead to brain morphological differences in neurodevelopmental diseases.Kristina AldridgeLei WangMichael P HarmsAmanda J MoffittKimberly K ColeJohn G CsernanskyLynn D SelemonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 8, p e43109 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kristina Aldridge Lei Wang Michael P Harms Amanda J Moffitt Kimberly K Cole John G Csernansky Lynn D Selemon A longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.
description	<h4>Background</h4>Early gestation represents a period of vulnerability to environmental insult that has been associated with adult psychiatric disease. However, little is known about how prenatal perturbation translates into adult brain dysfunction. Here, we use a longitudinal study design to examine the effects of disruption of early gestational neurogenesis on brain volume in the non-human primate.<h4>Methods and principal findings</h4>Five Rhesus macaques were exposed to x-irradiation in early gestation (E30-E41), and four control monkeys were sham-irradiated at comparable ages. Whole brain magnetic resonance imaging was performed at 6 months, 12 months, and 3 and 5 years of age. Volumes of whole cerebrum, cortical gray matter, caudate, putamen, and thalamus were estimated using semi-automated segmentation methods and high dimensional brain mapping. Volume reductions spanning all ages were observed in irradiated monkeys in the putamen (15-24%, p = 0.01) and in cortical gray matter (6-15%, p = 0.01). Upon covarying for whole cerebral volume, group differences were reduced to trend levels (putamen: p = 0.07; cortical gray matter: p = 0.08). No group-by-age effects were significant.<h4>Conclusions</h4>Due to the small number of observations, the conclusions drawn from this study must be viewed as tentative. Early gestational irradiation may result in non-uniform reduction of gray matter, mainly affecting the putamen and cerebral cortex. This may be relevant to understanding how early prenatal environmental insult could lead to brain morphological differences in neurodevelopmental diseases.
format	article
author	Kristina Aldridge Lei Wang Michael P Harms Amanda J Moffitt Kimberly K Cole John G Csernansky Lynn D Selemon
author_facet	Kristina Aldridge Lei Wang Michael P Harms Amanda J Moffitt Kimberly K Cole John G Csernansky Lynn D Selemon
author_sort	Kristina Aldridge
title	A longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.
title_short	A longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.
title_full	A longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.
title_fullStr	A longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.
title_full_unstemmed	A longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.
title_sort	longitudinal analysis of regional brain volumes in macaques exposed to x-irradiation in early gestation.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/1874739b95ac432cb786422eeee21bc2
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A longitudinal analysis of regional brain volumes in macaques exposed to X-irradiation in early gestation.

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