Associations between physical growth and general cognitive functioning in international adoptees from Eastern Europe at 30 months post-arrival / M. G. KROUPINA in Journal of Neurodevelopmental Disorders, 7-1 (December 2015)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 7-1 (December 2015) . - p.36 Titre : Associations between physical growth and general cognitive functioning in international adoptees from Eastern Europe at 30 months post-arrival Type de document : Texte imprimé et/ou numérique Auteurs : M. G. KROUPINA, Auteur ; J. K. ECKERLE, Auteur ; A. J. FUGLESTAD, Auteur ; L. TOEMEN, Auteur ; S. MOBERG, Auteur ; J. H. HIMES, Auteur ; B. S. MILLER, Auteur ; A. PETRYK, Auteur ; D. E. JOHNSON, Auteur Article en page(s) : p.36 Langues : Anglais (eng) Mots-clés : Cognitive functioning  Early adversity  Growth hormone system  International adoption  Physical growth Index. décimale : PER Périodiques Résumé : BACKGROUND: Internationally adopted children have often experienced early adversity and growth suppression as a consequence of institutional care. Furthermore, these children are at risk for impaired cognitive development due to their early adverse experiences. This study examined the association between physical growth, the growth hormone (GH) system, and general cognitive functioning post-adoption. Based on previous research, we expected to find that a child's initial physical growth status and normalization of the growth hormone-insulin-like growth factor 1 (GH-IGF-1) axis would be positive predictors of general cognitive functioning. METHODS: Post-institutionalized children (n = 46) adopted from Eastern Europe were seen approximately 1 month after their arrival into the USA to determine baseline measurements. They were seen again 6 and 30 months later for two follow-up sessions. Measures included anthropometry, insulin-like growth factor-1 (IGF-1), IGF binding protein-3 (IGFBP-3), Mullen Scales of Early Learning, and Stanford-Binet Intelligence Scales. Information about parental education was also collected. RESULTS: We found that a child's general cognitive functioning at 30 months post-adoption was predicted by their general developmental scores at 6 months post-adoption, their initial height status, and markers of the growth hormone system. Children with lower initial IGFBP-3 standard deviation (SD) scores had higher verbal IQ scores at 30 months. Furthermore, a child's initial height was found to be a significant positive predictor of non-verbal IQ. CONCLUSIONS: These results suggest an association between a child's suppressed physical growth in response to early adversity and alterations in GH system functioning and subsequent recovery in cognitive functioning. En ligne : http://dx.doi.org/10.1186/s11689-015-9132-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=348 [article] Associations between physical growth and general cognitive functioning in international adoptees from Eastern Europe at 30 months post-arrival [Texte imprimé et/ou numérique] / M. G. KROUPINA, Auteur ; J. K. ECKERLE, Auteur ; A. J. FUGLESTAD, Auteur ; L. TOEMEN, Auteur ; S. MOBERG, Auteur ; J. H. HIMES, Auteur ; B. S. MILLER, Auteur ; A. PETRYK, Auteur ; D. E. JOHNSON, Auteur . - p.36. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 7-1 (December 2015) . - p.36 Mots-clés : Cognitive functioning  Early adversity  Growth hormone system  International adoption  Physical growth Index. décimale : PER Périodiques Résumé : BACKGROUND: Internationally adopted children have often experienced early adversity and growth suppression as a consequence of institutional care. Furthermore, these children are at risk for impaired cognitive development due to their early adverse experiences. This study examined the association between physical growth, the growth hormone (GH) system, and general cognitive functioning post-adoption. Based on previous research, we expected to find that a child's initial physical growth status and normalization of the growth hormone-insulin-like growth factor 1 (GH-IGF-1) axis would be positive predictors of general cognitive functioning. METHODS: Post-institutionalized children (n = 46) adopted from Eastern Europe were seen approximately 1 month after their arrival into the USA to determine baseline measurements. They were seen again 6 and 30 months later for two follow-up sessions. Measures included anthropometry, insulin-like growth factor-1 (IGF-1), IGF binding protein-3 (IGFBP-3), Mullen Scales of Early Learning, and Stanford-Binet Intelligence Scales. Information about parental education was also collected. RESULTS: We found that a child's general cognitive functioning at 30 months post-adoption was predicted by their general developmental scores at 6 months post-adoption, their initial height status, and markers of the growth hormone system. Children with lower initial IGFBP-3 standard deviation (SD) scores had higher verbal IQ scores at 30 months. Furthermore, a child's initial height was found to be a significant positive predictor of non-verbal IQ. CONCLUSIONS: These results suggest an association between a child's suppressed physical growth in response to early adversity and alterations in GH system functioning and subsequent recovery in cognitive functioning. En ligne : http://dx.doi.org/10.1186/s11689-015-9132-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=348

Hippocampus specific iron deficiency alters competition and cooperation between developing memory systems / E. S. CARLSON in Journal of Neurodevelopmental Disorders, 2-3 (September 2010)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 2-3 (September 2010) . - p.133-43 Titre : Hippocampus specific iron deficiency alters competition and cooperation between developing memory systems Type de document : Texte imprimé et/ou numérique Auteurs : E. S. CARLSON, Auteur ; S. J. FRETHAM, Auteur ; E. UNGER, Auteur ; M. O'CONNOR, Auteur ; A. PETRYK, Auteur ; T. SCHALLERT, Auteur ; R. RAO, Auteur ; I. TKAC, Auteur ; Michael K. GEORGIEFF, Auteur Article en page(s) : p.133-43 Langues : Anglais (eng) Mots-clés : DMT1, Slc11a2, Nuclear magnetic resonance spectroscopy  Hippocampus  Iron deficiency  Memory systems  Morris water maze  Procedural memory  Spatial memory  Striatum Index. décimale : PER Périodiques Résumé : UNLABELLED: Iron deficiency (ID) is the most common gestational micronutrient deficiency in the world, targets the fetal hippocampus and striatum and results in long-term behavioral abnormalities. These structures primarily mediate spatial and procedural memory, respectively, in the rodent but have interconnections that result in competition or cooperation during cognitive tasks. We determined whether ID-induced impairment of one alters the function of the other by genetically inducing a 40% reduction of hippocampus iron content in late fetal life in mice and measuring dorsal striatal gene expression and metabolism and the behavioral balance between the two memory systems in adulthood. Slc11a2(hipp/hipp) mice had similar striatum iron content, but 18% lower glucose and 44% lower lactate levels, a 30% higher phosphocreatine:creatine ratio, and reduced iron transporter gene expression compared to wild type (WT) littermates, implying reduced striatal metabolic function. Slc11a2(hipp/hipp) mice had longer mean escape times on a cued task paradigm implying impaired procedural memory. Nevertheless, when hippocampal and striatal memory systems were placed in competition using a Morris Water Maze task that alternates spatial navigation and visual cued responses during training, and forces a choice between hippocampal and striatal strategies during probe trials, Slc11a2(hipp/hipp) mice used the hippocampus-dependent response less often (25%) and the visual cued response more often (75%) compared to WT littermates that used both strategies approximately equally. Hippocampal ID not only reduces spatial recognition memory performance but also affects systems that support procedural memory, suggesting an altered balance between memory systems. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11689-010-9049-0) contains supplementary material, which is available to authorized users. En ligne : http://dx.doi.org/10.1007/s11689-010-9049-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=342 [article] Hippocampus specific iron deficiency alters competition and cooperation between developing memory systems [Texte imprimé et/ou numérique] / E. S. CARLSON, Auteur ; S. J. FRETHAM, Auteur ; E. UNGER, Auteur ; M. O'CONNOR, Auteur ; A. PETRYK, Auteur ; T. SCHALLERT, Auteur ; R. RAO, Auteur ; I. TKAC, Auteur ; Michael K. GEORGIEFF, Auteur . - p.133-43. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 2-3 (September 2010) . - p.133-43 Mots-clés : DMT1, Slc11a2, Nuclear magnetic resonance spectroscopy  Hippocampus  Iron deficiency  Memory systems  Morris water maze  Procedural memory  Spatial memory  Striatum Index. décimale : PER Périodiques Résumé : UNLABELLED: Iron deficiency (ID) is the most common gestational micronutrient deficiency in the world, targets the fetal hippocampus and striatum and results in long-term behavioral abnormalities. These structures primarily mediate spatial and procedural memory, respectively, in the rodent but have interconnections that result in competition or cooperation during cognitive tasks. We determined whether ID-induced impairment of one alters the function of the other by genetically inducing a 40% reduction of hippocampus iron content in late fetal life in mice and measuring dorsal striatal gene expression and metabolism and the behavioral balance between the two memory systems in adulthood. Slc11a2(hipp/hipp) mice had similar striatum iron content, but 18% lower glucose and 44% lower lactate levels, a 30% higher phosphocreatine:creatine ratio, and reduced iron transporter gene expression compared to wild type (WT) littermates, implying reduced striatal metabolic function. Slc11a2(hipp/hipp) mice had longer mean escape times on a cued task paradigm implying impaired procedural memory. Nevertheless, when hippocampal and striatal memory systems were placed in competition using a Morris Water Maze task that alternates spatial navigation and visual cued responses during training, and forces a choice between hippocampal and striatal strategies during probe trials, Slc11a2(hipp/hipp) mice used the hippocampus-dependent response less often (25%) and the visual cued response more often (75%) compared to WT littermates that used both strategies approximately equally. Hippocampal ID not only reduces spatial recognition memory performance but also affects systems that support procedural memory, suggesting an altered balance between memory systems. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11689-010-9049-0) contains supplementary material, which is available to authorized users. En ligne : http://dx.doi.org/10.1007/s11689-010-9049-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=342

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