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Menezes ACF, Wunderlich ALM, Luiz KG, Frigoli GF, Costa IRD, Stopa LRDS, Souza CF, Guergolette RP, Shishido PK, Aquino ABO, Forcato S, Gerardin DCC, Zaia CTBV, Uchoa ET, Fernandes GSA. Neonatal undernutrition induced by litter size expansion alters testicular parameters in adult Wistar rats. Br J Nutr 2024:1-12. [PMID: 39391932 DOI: 10.1017/s0007114524002149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2024]
Abstract
Several models of maternal undernutrition reveal impairment of testicular development and compromise spermatogenesis in male offspring. The expansion of the litter size model, valuable for studying the impact of undernutrition on early development, has not yet been used to evaluate the consequences of early undernutrition in the adult male reproductive system. For this purpose, pups were raised in either normal litter (ten pups/dam) or large litter (LL; sixteen pups/dam). On postnatal day 90, sexual behaviour was evaluated or blood, adipose and reproductive tissues were collected for biochemical, histological and morphological analysis. Adult LL animals were lighter and thinner than controls. They showed increased food intake, but decrease of retroperitoneal white adipose tissue weight, glycaemia after oral glucose overload and plasma concentration of cholesterol. Reproductive organ weights were not altered by undernutrition, but histopathological analysis revealed an increased number of abnormal seminiferous tubules and number of immature spermatids in the tubular lumen of LL animals. These animals also showed reduction in total spermatic reserve and daily sperm production in the testes. Undernutrition decreased the number of Sertoli cells, and testosterone production was increased in the LL group. Mitochondrial activity of spermatozoa remained unchanged between experimental groups, suggesting no significant impact on the energy-related processes associated with sperm function. All animals from both experimental groups were considered sexually competent, with no significant difference in the parameters of sexual behaviour. We conclude that neonatal undernutrition induces histological and physiological testicular changes, without altering sperm quality and sexual behaviour of animals.
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Affiliation(s)
- Ana Camila Ferreira Menezes
- State University of Londrina, Biological Sciences Centre, Department of General Biology, Laboratory of Toxicology and Metabolic Disorders of Reproduction, Londrina, Brazil
| | | | - Karen Gomes Luiz
- State University of Londrina, Biological Sciences Centre, Department of General Biology, Laboratory of Toxicology and Metabolic Disorders of Reproduction, Londrina, Brazil
| | - Giovanna Fachetti Frigoli
- State University of Londrina, Biological Sciences Centre, Department of General Biology, Laboratory of Toxicology and Metabolic Disorders of Reproduction, Londrina, Brazil
| | - Ivana Regina D Costa
- State University of Londrina, Biological Sciences Centre, Department of General Biology, Laboratory of Toxicology and Metabolic Disorders of Reproduction, Londrina, Brazil
| | | | - Camila Franciele Souza
- Multicentre Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
| | | | - Polyana Keiko Shishido
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
| | | | - Simone Forcato
- Multicentre Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Daniela Cristina Ceccatto Gerardin
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
- Multicentre Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
- Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Cássia Thaïs Bussamra Vieira Zaia
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
- Multicentre Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
- Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Ernane Torres Uchoa
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
- Multicentre Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
- Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Glaura Scantamburlo Alves Fernandes
- State University of Londrina, Biological Sciences Centre, Department of General Biology, Laboratory of Toxicology and Metabolic Disorders of Reproduction, Londrina, Brazil
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, Brazil
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Wunderlich AL, Stopa L, Martins AB, de Souza CF, Monteiro É, Aguiar D, Guergolette R, Shishido P, Zaia CT, Uchoa E. Neonatal overnutritional programming impairs the hypophagia and neuron activation induced by acute lipopolysaccharide in adult male rats. Nutr Neurosci 2024; 27:734-744. [PMID: 37650777 DOI: 10.1080/1028415x.2023.2250967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Nutritional status during critical windows in early development can challenge metabolic functions and physiological responses to immune stress in adulthood, such as the systemic inflammation induced by lipopolysaccharide (LPS). The aim of this study was to investigate the long-term effects of post-natal over- and undernutrition on the anorexigenic effect of LPS and its association with neuronal activation in the brainstem and hypothalamus of male rats. Animals were raised in litters of 3 (small - SL), 10 (normal - NL), or 16 (large - LL) pups per dam. On post-natal day 60, male rats were treated with LPS (500 µg/Kg) or vehicle for the evaluation of food intake and c-Fos expression in the area postrema (AP), nucleus of solitary tract (NTS), and paraventricular (PVN), arcuate (ARC), ventromedial (VMH), and dorsomedial (DMH) nuclei of the hypothalamus. SL, NL, and LL animals showed a decreased food consumption after LPS treatment. In under- and normonourished animals, peripheral LPS induced an increase in neuronal activation in the brainstem, PaV, PaMP, and ARC and a decrease in the number of c-Fos-ir neurons in the DMH. Overnourished rats showed a reduced hypophagic response, lower neuron activation in the NTS and PaMP, and no response in the DMH induced by LPS. These results indicate that early nutritional programming displays different responses to LPS, by means of neonatal overnutrition decreasing LPS-mediated anorexigenic effect and neuronal activation in the NTS and hypothalamic nuclei.
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Affiliation(s)
- Ana Luiza Wunderlich
- Postgraduate Program in Physiological Sciences, Universidade Estadual de Londrina, Londrina, Brazil
| | - Larissa Stopa
- Postgraduate Program in Physiological Sciences, Universidade Estadual de Londrina, Londrina, Brazil
| | - Andressa Busetti Martins
- Multicenter Program in Physiological Sciences, Universidade Estadual de Londrina, Londrina, Brazil
| | | | - Érica Monteiro
- Department of Physiological Sciences, Universidade Estadual de Londrina, Londrina, Brazil
| | - Danielly Aguiar
- Ciências Fisiológicas, State University of Londrina: Universidade Estadual de Londrina, Londrina, Brazil
| | - Rhauany Guergolette
- Ciências Fisiológicas, State University of Londrina: Universidade Estadual de Londrina, Londrina, Brazil
| | - Polyana Shishido
- Postgraduate Program in Physiological Sciences, Universidade Estadual de Londrina, Londrina, Brazil
| | - Cassia Thais Zaia
- Department of Physiological Sciences, Universidade Estadual de Londrina, Londrina, Brazil
| | - Ernane Uchoa
- Ciências Fisiológicas, State University of Londrina: Universidade Estadual de Londrina, Londrina, Brazil
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Krejcová LV, Bento-Torres J, Diniz DG, Pereira A, Batista-de-Oliveira M, de Morais AACL, Mendes-da-Silva RF, Abadie-Guedes R, dos Santos ÂA, Lima DS, Guedes RCA, Picanço-Diniz CW. Unraveling the Influence of Litter Size, Maternal Care, Exercise, and Aging on Neurobehavioral Plasticity and Dentate Gyrus Microglia Dynamics in Male Rats. Brain Sci 2024; 14:497. [PMID: 38790475 PMCID: PMC11119659 DOI: 10.3390/brainsci14050497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 04/30/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
This study explores the multifaceted influence of litter size, maternal care, exercise, and aging on rats' neurobehavioral plasticity and dentate gyrus microglia dynamics. Body weight evolution revealed a progressive increase until maturity, followed by a decline during aging, with larger litters exhibiting lower weights initially. Notably, exercised rats from smaller litters displayed higher body weights during the mature and aged stages. The dentate gyrus volumes showed no significant differences among groups, except for aged sedentary rats from smaller litters, which exhibited a reduction. Maternal care varied significantly based on litter size, with large litter dams showing lower frequencies of caregiving behaviors. Behavioral assays highlighted the detrimental impact of a sedentary lifestyle and reduced maternal care/large litters on spatial memory, mitigated by exercise in aged rats from smaller litters. The microglial dynamics in the layers of dentate gyrus revealed age-related changes modulated by litter size and exercise. Exercise interventions mitigated microgliosis associated with aging, particularly in aged rats. These findings underscore the complex interplay between early-life experiences, exercise, microglial dynamics, and neurobehavioral outcomes during aging.
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Affiliation(s)
- Lane Viana Krejcová
- Neurodegeneration and Infection Research Laboratory, João de Barros Barreto Universitary Hospital, Institute of Biological Sciences, Federal University of Pará, Belém 66050-160, Pará, Brazil
| | - João Bento-Torres
- Neurodegeneration and Infection Research Laboratory, João de Barros Barreto Universitary Hospital, Institute of Biological Sciences, Federal University of Pará, Belém 66050-160, Pará, Brazil
| | - Daniel Guerreiro Diniz
- Neurodegeneration and Infection Research Laboratory, João de Barros Barreto Universitary Hospital, Institute of Biological Sciences, Federal University of Pará, Belém 66050-160, Pará, Brazil
- Postgraduate Program in Oncology and Medical Sciences, João de Barros Barreto Universitary Hospital, Federal University of Pará, Belém 66075-110, Pará, Brazil
- Electron Microscopy Laboratory, Evandro Chagas Institute, Belém 66093-020, Pará, Brazil
| | - Antonio Pereira
- Neurodegeneration and Infection Research Laboratory, João de Barros Barreto Universitary Hospital, Institute of Biological Sciences, Federal University of Pará, Belém 66050-160, Pará, Brazil
| | - Manuella Batista-de-Oliveira
- Naíde Teodósio Nutrition Physiology Laboratory, Department of Nutrition, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | | | | | - Ricardo Abadie-Guedes
- Naíde Teodósio Nutrition Physiology Laboratory, Department of Nutrition, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Ângela Amâncio dos Santos
- Naíde Teodósio Nutrition Physiology Laboratory, Department of Nutrition, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Denise Sandrelly Lima
- Naíde Teodósio Nutrition Physiology Laboratory, Department of Nutrition, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Rubem Carlos Araujo Guedes
- Naíde Teodósio Nutrition Physiology Laboratory, Department of Nutrition, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Cristovam Wanderley Picanço-Diniz
- Neurodegeneration and Infection Research Laboratory, João de Barros Barreto Universitary Hospital, Institute of Biological Sciences, Federal University of Pará, Belém 66050-160, Pará, Brazil
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León-Ramírez YMD, Sánchez EP, Pérez AC, Sánchez-Solís CN, Rodríguez-Antolín J, Nicolás-Toledo L. Dietary intervention in adult rats exposed to a high-sugar diet early in life permanently impairs sperm quality. ANNALES D'ENDOCRINOLOGIE 2023; 84:779-789. [PMID: 37343721 DOI: 10.1016/j.ando.2023.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 05/16/2023] [Accepted: 06/15/2023] [Indexed: 06/23/2023]
Abstract
Childhood obesity predicts the presence of adult obesity. Obesity is associated with poor sperm quality. We hypothesized that exposure to a high-sugar diet (HSD) in early life would cause permanent histomorphology damage to the testes, resulting in reduced sperm quality in adult life. Wistar rats (aged 21days) were divided into four groups (n=6). In the first experiment, the rats received tap water (control) and a 30% sucrose diet for two months (S30). In the second experiment, the control and 30% sucrose diets were fed for two months, followed by replacement with tap water for two months (IS30). Eating and drinking were monitored. Animals were then euthanized, visceral and gonadal fat tissue and testes were collected, and epididymal spermatozoa were excised. Testicular samples were used for morphological description by H&E staining and for quantifying triacylglycerol content, caspase activity, and oxidative stress. Serum testosterone concentration was evaluated. Spermatozoa were used to assess sperm quality. Our results show that sperm quality was impaired by consuming HSD and could not be restored by dietary intervention. HSD feeding induced hyperplasia of visceral adipose tissue, increased testicular weight, and serum testosterone levels. The dietary intervention increased visceral adipose tissue, serum, and testicular triacylglycerol levels and normalized serum testosterone levels. Overall, the HSD diet caused permanent changes in seminiferous tubule cross-sectional area, caspase activity, oxidative stress, and sperm quality. Therefore, a high-sugar diet in early life causes permanent damage to sperm quality in adulthood.
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Affiliation(s)
- Yeimy Mar De León-Ramírez
- Doctorado en Ciencias Biológicas, Universidad Autónoma de Tlaxcala, Tlaxcala, México; Licenciatura en Química Clínica, Facultad de Ciencias de la Salud, Universidad Autónoma de Tlaxcala, Tlaxcala, México
| | - Eliut Pérez Sánchez
- Licenciatura en Química Clínica, Facultad de Ciencias de la Salud, Universidad Autónoma de Tlaxcala, Tlaxcala, México
| | - Adriana Corona Pérez
- Licenciatura en Nutrición, Unidad Académica Multidisciplinaria Calpulalpan, Universidad Autónoma de Tlaxcala, Tlaxcala, México
| | - Cristhian Neftaly Sánchez-Solís
- Licenciatura en Nutrición, Unidad Académica Multidisciplinaria Calpulalpan, Universidad Autónoma de Tlaxcala, Tlaxcala, México
| | - Jorge Rodríguez-Antolín
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala, México
| | - Leticia Nicolás-Toledo
- Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Tlaxcala, México.
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Wunderlich ALM, Martins AB, de Souza CF, Stopa LRS, Monteiro ÉCAM, Aguiar DD, Guergolette RP, Zaia CTBV, Uchôa ET. Neonatal overnutrition, but not neonatal undernutrition, disrupts CCK-induced hypophagia and neuron activation of the nucleus of the solitary tract and paraventricular nucleus of hypothalamus of male Wistar rats. Brain Res Bull 2023; 195:109-119. [PMID: 36813046 DOI: 10.1016/j.brainresbull.2023.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 02/16/2023] [Accepted: 02/18/2023] [Indexed: 02/22/2023]
Abstract
Metabolic programming may be induced by reduction or enhancement of litter size, which lead to neonatal over or undernutrition, respectively. Changes in neonatal nutrition can challenge some regulatory processes in adulthood, such as the hypophagic effect of cholecystokinin (CCK). In order to investigate the effects of nutritional programming on the anorexigenic function of CCK in adulthood, pups were raised in small (SL, 3 pups per dam), normal (NL, 10 pups per dam), or large litters (LL, 16 pups per dam), and on postnatal day 60, male rats were treated with vehicle or CCK (10 µg/Kg) for the evaluation of food intake and c-Fos expression in the area postrema (AP), nucleus of solitary tract (NTS), and paraventricular (PVN), arcuate (ARC), ventromedial (VMH), and dorsomedial (DMH) nuclei of the hypothalamus. Overnourished rats showed increased body weight gain that was inversely correlated with neuronal activation of PaPo, VMH, and DMH neurons, whereas undernourished rats had lower body weight gain, inversely correlated with increased neuronal activation of PaPo only. SL rats showed no anorexigenic response and lower neuron activation in the NTS and PVN induced by CCK. LL exhibited preserved hypophagia and neuron activation in the AP, NTS, and PVN in response to CCK. CCK showed no effect in c-Fos immunoreactivity in the ARC, VMH, and DMH in any litter. These results indicate that anorexigenic actions, associated with neuron activation in the NTS and PVN, induced by CCK were impaired by neonatal overnutrition. However, these responses were not disrupted by neonatal undernutrition. Thus, data suggest that an excess or poor supply of nutrients during lactation display divergent effects on programming CCK satiation signaling in male adult rats.
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Affiliation(s)
| | - Andressa Busetti Martins
- Multicenter Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil
| | - Camila Franciele de Souza
- Multicenter Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil
| | - Larissa Rugila S Stopa
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil
| | | | - Danielly D Aguiar
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil
| | - Rhauany P Guergolette
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil
| | - Cássia Thaïs B V Zaia
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil; Multicenter Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil; Department of Physiological Sciences, State University of Londrina, Londrina, PR, Brazil
| | - Ernane Torres Uchôa
- Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil; Multicenter Postgraduate Program in Physiological Sciences, State University of Londrina, Londrina, PR, Brazil; Department of Physiological Sciences, State University of Londrina, Londrina, PR, Brazil.
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6
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Anwer H, Morris MJ, Noble DWA, Nakagawa S, Lagisz M. Transgenerational effects of obesogenic diets in rodents: A meta-analysis. Obes Rev 2022; 23:e13342. [PMID: 34595817 DOI: 10.1111/obr.13342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 08/11/2021] [Accepted: 08/12/2021] [Indexed: 12/22/2022]
Abstract
Obesity is a major health condition that affects millions worldwide. There is an increased interest in understanding the adverse outcomes associated with obesogenic diets. A multitude of studies have investigated the transgenerational impacts of maternal and parental obesogenic diets on subsequent generations of offspring, but results have largely been mixed. We conducted a systematic review and meta-analysis on rodent studies to elucidate how obesogenic diets impact the mean and variance of grand-offspring traits. Our study focused on transgenerational effects (i.e., F2 and F3 generations) in one-off and multigenerational exposure studies. From 33 included articles, we obtained 407 effect sizes representing pairwise comparisons of control and treatment grand-offspring groups pertaining to measures of body weight, adiposity, glucose, insulin, leptin, and triglycerides. We found evidence that male and female grand-offspring descended from grandparents exposed to an obesogenic diet displayed phenotypes consistent with metabolic syndrome, especially in cases where the obesogenic diet was continued across generations. Further, we found stronger evidence for the effects of grand-maternal than grand-paternal exposure on grand-offspring traits. A high-fat diet in one-off exposure studies did not seem to impact phenotypic variation, whereas in multigenerational exposure studies it reduced variation in several traits.
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Affiliation(s)
- Hamza Anwer
- Evolution and Ecology Research Centre and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Margaret J Morris
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Daniel W A Noble
- Evolution and Ecology Research Centre and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia
- Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Shinichi Nakagawa
- Evolution and Ecology Research Centre and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Malgorzata Lagisz
- Evolution and Ecology Research Centre and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia
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Zhu X, Du S, Yan Q, Min C, Zhou N, Zhou W, Li X. Dietary curcumin supplementation promotes browning and energy expenditure in postnatal overfed rats. Nutr Metab (Lond) 2021; 18:97. [PMID: 34717663 PMCID: PMC8557570 DOI: 10.1186/s12986-021-00625-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 10/15/2021] [Indexed: 12/29/2022] Open
Abstract
Background Early postnatal overfeeding could result in metabolic imprinting that decreases energy expenditure following white adipose tissue (WAT) gain throughout life. This research investigated whether curcumin (CUR) supplementation could promote WAT browning and activate thermogenesis in postnatal overfed rats. Methods and results This study adjusted the size of litters to three (small litters, SL) or ten (normal litters, NL) to mimic early postnatal overfeeding or normal feeding from postnatal day 3. From postnatal week 3 (weaning period), SL rats were fed a standard diet (SL) or a diet supplemented with 1% (SL1% CUR) or 2% (SL2% CUR) CUR for ten weeks. At postnatal week 13, SL rats with 1% or 2% CUR supplementation had lower body weight and less WAT gain and had an increased lean mass ratio, and their glucose tolerance and blood lipid levels had recovered to normal when compared to SL rats that did not receive the supplement. Moreover, the increased heat generation were consistent with the expression levels of uncoupling protein 1 (UCP1) and other browning-related genes in the subcutaneous adipose tissue (SAT) of the SL2% CUR rats but not in the SL1% CUR rats. In addition, 2% CUR dietary supplementation enhanced the serum norepinephrine levels in SL rats, with upregulated mRNA levels of β3-adrenergic receptor (β3-AR) in SAT. Conclusion Dietary CUR supplementation attenuates body fat gain and metabolic disorders in SL, which might be induced by promoting browning of SAT and energy expenditure. Moreover, the benefits were more obvious in SL with 2% CUR supplementation. Supplementary Information The online version contains supplementary material available at 10.1186/s12986-021-00625-5.
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Affiliation(s)
- Xiaolei Zhu
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, Jiangsu Province, People's Republic of China
| | - Susu Du
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, Jiangsu Province, People's Republic of China
| | - Qinhui Yan
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, Jiangsu Province, People's Republic of China
| | - Cuiting Min
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, Jiangsu Province, People's Republic of China
| | - Nan Zhou
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, Jiangsu Province, People's Republic of China
| | - Wei Zhou
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, Jiangsu Province, People's Republic of China
| | - Xiaonan Li
- Department of Child Health Care, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, Jiangsu Province, People's Republic of China. .,Institute of Pediatric Research, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China.
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8
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Zhou N, Du S, Dai Y, Yang F, Li X. ω3PUFAs improve hepatic steatosis in postnatal overfed rats and HepG2 cells by inhibiting acetyl-CoA carboxylase. Food Sci Nutr 2021; 9:5153-5165. [PMID: 34532024 PMCID: PMC8441356 DOI: 10.1002/fsn3.2482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 06/14/2021] [Accepted: 07/07/2021] [Indexed: 11/18/2022] Open
Abstract
Postnatal overfeeding can lead to persistent increases in hepatic lipid synthesis and the risk of nonalcoholic fatty liver disease (NAFLD) in adulthood. The ω3 polyunsaturated fatty acids (ω3PUFAs) exhibit beneficial effects on NAFLD. Here, we employed a rat model and an in vitro HepG2 cell model to investigate whether fish oil (FO) affects hepatic lipid synthesis due to postnatal overfeeding. Male Sprague-Dawley were divided into litter sizes of three (small litters, SLs) or 10 (normal litters, NLs) on postnatal day 3 and were fed standard chow or FO diet beginning on postnatal week 3 to generate NL, SL, NL-FO, and SL-FO groups. The results indicated that the FO diet reduced the postnatal overfeeding-induced body weight gain and NAFLD characteristics (such as serum and liver triglyceride (TG) and hepatic steatosis). In addition, FO restored the expression of hepatic lipid metabolism-related genes (including SCD1, FASN, CPT1, LPL, ACC, and SREBP-1c) in SL-FO rats. Specifically, the activity and expression pattern of ACC were consistent with SREBP-1c. Furthermore, HepG2 cells were treated with oleic acid (OA), followed by eicosapentenoic acid (EPA), with or without SREBP-1c siRNA. The cellular lipid droplets, TG content, and the expression of ACC (by 75%) and SREBP-1c (by 45%) were increased by OA stimulation (p < .05), which was inhibited by EPA treatment. However, the effect of EPA treatment was abolished when SREBP-1c was silenced. In conclusion, ω3PUFAs-rich diet may be an effective way to reverse the developmental programming of hepatic lipid synthesis, at least partially, by inhibiting ACC through modulating SREBP-1c.
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Affiliation(s)
- Nan Zhou
- Department of Child Health CareChildren’s Hospital of Nanjing Medical UniversityNanjingChina
| | - Susu Du
- Department of Child Health CareChildren’s Hospital of Nanjing Medical UniversityNanjingChina
| | - Yanyan Dai
- Department of Child Health CareChildren’s Hospital of Nanjing Medical UniversityNanjingChina
| | - Fan Yang
- Department of Child Health CareChildren’s Hospital of Nanjing Medical UniversityNanjingChina
| | - Xiaonan Li
- Department of Child Health CareChildren’s Hospital of Nanjing Medical UniversityNanjingChina
- Institute of Pediatric ResearchNanjing Medical UniversityNanjingChina
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9
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Programming of Cardiovascular Dysfunction by Postnatal Overfeeding in Rodents. Int J Mol Sci 2020; 21:ijms21249427. [PMID: 33322275 PMCID: PMC7763005 DOI: 10.3390/ijms21249427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 11/17/2022] Open
Abstract
Nutritional environment in the perinatal period has a great influence on health and diseases in adulthood. In rodents, litter size reduction reproduces the effects of postnatal overnutrition in infants and reveals that postnatal overfeeding (PNOF) not only permanently increases body weight but also affects the cardiovascular function in the short- and long-term. In addition to increased adiposity, the metabolic status of PNOF rodents is altered, with increased plasma insulin and leptin levels, associated with resistance to these hormones, changed profiles and levels of circulating lipids. PNOF animals present elevated arterial blood pressure with altered vascular responsiveness to vasoactive substances. The hearts of overfed rodents exhibit hypertrophy and elevated collagen content. PNOF also induces a disturbance of cardiac mitochondrial respiration and produces an imbalance between oxidants and antioxidants. A modification of the expression of crucial genes and epigenetic alterations is reported in hearts of PNOF animals. In vivo, a decreased ventricular contractile function is observed during adulthood in PNOF hearts. All these alterations ultimately lead to an increased sensitivity to cardiac pathologic challenges such as ischemia-reperfusion injury. Nevertheless, caloric restriction and physical exercise were shown to improve PNOF-induced cardiac dysfunction and metabolic abnormalities, drawing a path to the potential therapeutic correction of early nutritional programming.
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Parra-Vargas M, Ramon-Krauel M, Lerin C, Jimenez-Chillaron JC. Size Does Matter: Litter Size Strongly Determines Adult Metabolism in Rodents. Cell Metab 2020; 32:334-340. [PMID: 32814016 DOI: 10.1016/j.cmet.2020.07.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 06/16/2020] [Accepted: 07/20/2020] [Indexed: 11/25/2022]
Abstract
In this essay, we highlight how litter size in rodents is a strong determinant of neonatal growth and long-term metabolic health. Based on these effects, we strongly advise that scientific articles that utilize rodent models for obesity and metabolic research should include information on the litter sizes in the study to increase the data transparency of such reports.
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Affiliation(s)
- Marcela Parra-Vargas
- Institut de Recerca Sant Joan de Déu, Endocrinology, c/ Santa Rosa 39-57, 4ª planta, Esplugues, 08950 Barcelona, Spain
| | - Marta Ramon-Krauel
- Institut de Recerca Sant Joan de Déu, Endocrinology, c/ Santa Rosa 39-57, 4ª planta, Esplugues, 08950 Barcelona, Spain
| | - Carles Lerin
- Institut de Recerca Sant Joan de Déu, Endocrinology, c/ Santa Rosa 39-57, 4ª planta, Esplugues, 08950 Barcelona, Spain
| | - Josep C Jimenez-Chillaron
- Institut de Recerca Sant Joan de Déu, Endocrinology, c/ Santa Rosa 39-57, 4ª planta, Esplugues, 08950 Barcelona, Spain.
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11
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Blin G, Liand M, Mauduit C, Chehade H, Benahmed M, Simeoni U, Siddeek B. Maternal Exposure to High-Fat Diet Induces Long-Term Derepressive Chromatin Marks in the Heart. Nutrients 2020; 12:E181. [PMID: 31936461 PMCID: PMC7019950 DOI: 10.3390/nu12010181] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/30/2019] [Accepted: 01/07/2020] [Indexed: 02/07/2023] Open
Abstract
Heart diseases are a leading cause of death. While the link between early exposure to nutritional excess and heart disease risk is clear, the molecular mechanisms involved are poorly understood. In the developmental programming field, increasing evidence is pointing out the critical role of epigenetic mechanisms. Among them, polycomb repressive complex 2 (PRC2) and DNA methylation play a critical role in heart development and pathogenesis. In this context, we aimed at evaluating the role of these epigenetic marks in the long-term cardiac alterations induced by early dietary challenge. Using a model of rats exposed to maternal high-fat diet during gestation and lactation, we evaluated cardiac alterations at adulthood. Expression levels of PRC2 components, its histone marks di- and trimethylated histone H3 (H3K27me2/3), associated histone mark (ubiquitinated histone H2A, H2AK119ub1) and target genes were measured by Western blot. Global DNA methylation level and DNA methyl transferase 3B (DNMT3B) protein levels were measured. Maternal high-fat diet decreased H3K27me3, H2Ak119ub1 and DNA methylation levels, down-regulated the enhancer of zeste homolog 2 (EZH2), and DNMT3B expression. The levels of the target genes, isl lim homeobox 1 (Isl1), six homeobox 1 (Six1) and mads box transcription enhancer factor 2, polypeptide C (Mef2c), involved in cardiac pathogenesis were up regulated. Overall, our data suggest that the programming of cardiac alterations by maternal exposure to high-fat diet involves the derepression of pro-fibrotic and pro-hypertrophic genes through the induction of EZH2 and DNMT3B deficiency.
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Affiliation(s)
- Guillaume Blin
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| | - Marjorie Liand
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| | - Claire Mauduit
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, 06204 Nice, France; (C.M.); (M.B.)
| | - Hassib Chehade
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| | - Mohamed Benahmed
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, 06204 Nice, France; (C.M.); (M.B.)
| | - Umberto Simeoni
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| | - Benazir Siddeek
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
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Yan L, Wang Y, Zhang Z, Xu S, Ullah R, Luo X, Xu X, Ma X, Chen Z, Zhang L, Lv Y, Du L. Postnatal delayed growth impacts cognition but rescues programmed impaired pulmonary vascular development in an IUGR rat model. Nutr Metab Cardiovasc Dis 2019; 29:1418-1428. [PMID: 31653519 DOI: 10.1016/j.numecd.2019.08.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 08/19/2019] [Accepted: 08/23/2019] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Intrauterine growth restriction (IUGR) is a state of slower fetal growth usually followed by a catch-up growth. Postnatal catch-up growth in IUGR models increases the incidence of pulmonary arterial hypertension in adulthood. Here, we hypothesize that the adverse pulmonary vascular consequences of IUGR may be improved by slowing down postnatal growth velocity. Meanwhile, cognitive function was also studied. METHODS AND RESULTS We established an IUGR rat model by restricting maternal food throughout gestation. After birth, pups were fed a regular or restricted diet during lactation by changing litter size. Thus, there were three experimental groups according to the dam/offspring diet: C/C (gold standard), IUGR with catch-up growth (R/C) and IUGR with delayed growth (R/D). In adulthood (14 weeks of age), we assessed pulmonary vascular development by hemodynamic measurement and immunohistochemistry. Our results showed that adult R/C offspring developed an elevated mean pulmonary arterial pressure (mPAP) and pulmonary arteriolar remodeling accompanied with decreased eNOS mRNA and protein expressions compared to C/C or R/D offspring. This suggested that delayed postnatal growth improved pulmonary circulation compared to postnatal catch-up growth. Conversely, adult R/D offspring performed poorly in cognition. Behavior test and electrophysiology results exhibited a reduced synaptic plasticity. Furthermore, decreased mRNA expression levels of the memory-related gene zif268 and transcription factor recruitment factor p300 in the hippocampus region were also observed in R/D group. CONCLUSION These findings indicate that delayed postnatal growth results in cognitive impairment, but it reverses elevations in mPAP induced by postnatal catch-up growth following IUGR.
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Affiliation(s)
- LingLing Yan
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Yu Wang
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - ZiMing Zhang
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - ShanShan Xu
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Rahim Ullah
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - XiaoFei Luo
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - XueFeng Xu
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - XiaoLu Ma
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Zheng Chen
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - LiYan Zhang
- Fujian University of Medicine, NICU, Fuzhou Children's Hospital of Fujian Province, Fuzhou, 350005, Fujian Province, China
| | - Ying Lv
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - LiZhong Du
- Department of Pediatrics, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, China.
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Aylwin CF, Toro CA, Shirtcliff E, Lomniczi A. Emerging Genetic and Epigenetic Mechanisms Underlying Pubertal Maturation in Adolescence. JOURNAL OF RESEARCH ON ADOLESCENCE : THE OFFICIAL JOURNAL OF THE SOCIETY FOR RESEARCH ON ADOLESCENCE 2019; 29:54-79. [PMID: 30869843 DOI: 10.1111/jora.12385] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The adolescent transition begins with the onset of puberty which, upstream in the brain, is initiated by the gonadotropin-releasing hormone (GnRH) pulse generator that activates the release of peripheral sex hormones. Substantial research in human and animal models has revealed a myriad of cellular networks and heritable genes that control the GnRH pulse generator allowing the individual to begin the process of reproductive competence and sexual maturation. Here, we review the latest knowledge in neuroendocrine pubertal research with emphasis on genetic and epigenetic mechanisms underlying the pubertal transition.
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Long-term impact of maternal high-fat diet on offspring cardiac health: role of micro-RNA biogenesis. Cell Death Discov 2019; 5:71. [PMID: 30854230 PMCID: PMC6397280 DOI: 10.1038/s41420-019-0153-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/08/2019] [Accepted: 02/13/2019] [Indexed: 12/25/2022] Open
Abstract
Heart failure is a worldwide leading cause of death. Diet and obesity are particularly of high concern in heart disease etiology. Gravely, altered nutrition during developmental windows of vulnerability can have long-term impact on heart health; however, the underlying mechanisms are poorly understood. In the understanding of the initiation of chronic diseases related to developmental exposure to environmental challenges, deregulations in epigenetic mechanisms including micro-RNAs have been proposed as key events. In this context, we aimed at delineating the role of micro-RNAs in the programming of cardiac alterations induced by early developmental exposure to nutritional imbalance. To reach our aim, we developed a human relevant model of developmental exposure to nutritional imbalance by maternally exposing rat to high-fat diet during gestation and lactation. In this model, offspring exposed to maternal high-fat diet developed cardiac hypertrophy and increased extracellular matrix depot compared to those exposed to chow diet. Microarray approach performed on cardiac tissue allowed the identification of a micro-RNA subset which was down-regulated in high-fat diet-exposed animals and which were predicted to regulate transforming growth factor-beta (TGFβ)-mediated remodeling. As indicated by in vitro approaches and gene expression measurement in the heart of our animals, decrease in DiGeorge critical region 8 (DGCR8) expression, involved in micro-RNA biogenesis, seems to be a critical point in the alterations of the micro-RNA profile and the TGFβ-mediated remodeling induced by maternal exposure to high-fat diet. Finally, increasing DGCR8 activity and/or expression through hemin treatment in vitro revealed its potential in the rescue of the pro-fibrotic phenotype in cardiomyocytes driven by DGCR8 decrease. These findings suggest that cardiac alterations induced by maternal exposure to high-fat diet is related to abnormalities in TGFβ pathway and associated with down-regulated micro-RNA processing. Our study highlighted DGCR8 as a potential therapeutic target for heart diseases related to early exposure to dietary challenge.
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Long-lived weight-reduced αMUPA mice show higher and longer maternal-dependent postnatal leptin surge. PLoS One 2017; 12:e0188658. [PMID: 29190757 PMCID: PMC5708666 DOI: 10.1371/journal.pone.0188658] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 11/10/2017] [Indexed: 12/20/2022] Open
Abstract
We investigated whether long-lived weight-reduced αMUPA mice differ from their wild types in postnatal body composition and leptin level, and whether these differences are affected by maternal-borne factors. Newborn αMUPA and wild type mice had similar body weight and composition up to the third postnatal week, after which αMUPA mice maintained lower body weight due to lower fat-free mass. Both strains showed a surge in leptin levels at the second postnatal week, initiating earlier in αMUPA mice, rising higher and lasting longer than in the wild types, mainly in females. Leptin level in dams' serum and breast milk, and in their pup's stomach content were also higher in αMUPA than in the WT during the surge peak. Leptin surge preceded the strain divergence in body weight, and was associated with an age-dependent decrease in the leptin:fat mass ratio-suggesting that postnatal sex and strain differences in leptin ontogeny are strongly influenced by processes independent of fat mass, such as production and secretion, and possibly outside fat tissues. Dam removal elevated corticosterone level in female pups from both strains similarly, yet mitigated the leptin surge only in αMUPA-eliminating the strain differences in leptin levels. Overall, our results indicate that αMUPA's postnatal leptin surge is more pronounced than in the wild type, more sensitive to maternal deprivation, less related to pup's total adiposity, and is associated with a lower post-weaning fat-free mass. These strain-related postnatal differences may be related to αMUPA's higher milk-borne leptin levels. Thus, our results support the use of αMUPA mice in future studies aimed to explore the relationship between maternal (i.e. milk-borne) factors, postnatal leptin levels, and post-weaning body composition and energy homeostasis.
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Impact of Early Nutrition on Body Composition in Children Aged 9.5 Years Born with Extremely Low Birth Weight. Nutrients 2017; 9:nu9020124. [PMID: 28208596 PMCID: PMC5331555 DOI: 10.3390/nu9020124] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 01/27/2017] [Accepted: 02/03/2017] [Indexed: 11/21/2022] Open
Abstract
To evaluate body composition, metabolism and growth as well as their interaction with early nutrition in former extremely low birth weight infants (ELBW), we assessed qualitative and quantitative nutritional intake during initial hospitalization and infantile growth parameters in 61 former ELBW infants with a birth weight <1000 g. In two follow-up exams, physical and biochemical development were measured at 5.7 and at 9.5 years. At the second follow-up, in addition to biochemical reassessment, body composition was analyzed by dual-energy x-ray absorptiometry (DEXA). Protein intake between birth and discharge was associated with weight gain in the first six months of life (r = 0.51; p < 0.01). Weight catch-up preceded height catch-up. Protein intake in early infancy correlated highly significantly with abdominal fat mass (r = 0.49; p < 0.05), but not with lean body mass at 9.5 years (r = 0.30; not significant (n.s.). In contrast to nutrient intake, birth weight was associated with lean body mass (r = 0.433; p < 0.001). Early protein and carbohydrate intake were associated with high-density lipoprotein (HDL)-cholesterol, and early catch-up growth correlated with fasting insulin at follow-up. Stepwise linear regression demonstrated that protein intake predicted fat mass (p < 0.05), whereas only gender and birth weight standard deviation score (SDS) contributed significantly to lean body mass variation (p < 0.05). Our results suggest an important impact of early nutrient intake on body composition and metabolism in later childhood in ELBW children.
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17
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Abstract
PURPOSE OF REVIEW Here, we provide a summary of the current knowledge on the impact of early life nutrition on cardiovascular diseases that have emerged from studies in humans and experimental animal models. The involvement of epigenetic mechanisms in the Developmental Origins of Health and Disease will be discussed in relation to the implications for the heart and the cardiovascular system. RECENT FINDINGS Environmental cues, such as parental diet and a suboptimal in utero environment can shape growth and development, causing long-lasting cardiometabolic perturbations. Increasing evidence suggest that these effects are mediated at the epigenomic level, and can be passed onto future generations. In the last decade, epigenetic mechanisms (DNA methylation, histone modifications) and RNA-based mechanisms (microRNAs, piRNAs, and tRNAs) have therefore emerged as potential candidates for mediating inheritance of cardiometabolic diseases. SUMMARY The burden of obesity and associated cardiometabolic diseases is believed to arise through interaction between an individual's genetics and the environment. Moreover, the risk of developing poor cardiometabolic health in adulthood is defined by early life exposure to pathological cues and can be inherited by future generations, initiating a vicious cycle of transmission of disease. Elucidating the molecular triggers of such a process will help tackle and prevent the uncontrolled rise in obesity and cardiometabolic disease.
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Affiliation(s)
- Elena Loche
- Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
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18
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A review of fundamental principles for animal models of DOHaD research: an Australian perspective. J Dev Orig Health Dis 2016; 7:449-472. [DOI: 10.1017/s2040174416000477] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Epidemiology formed the basis of ‘the Barker hypothesis’, the concept of ‘developmental programming’ and today’s discipline of the Developmental Origins of Health and Disease (DOHaD). Animal experimentation provided proof of the underlying concepts, and continues to generate knowledge of underlying mechanisms. Interventions in humans, based on DOHaD principles, will be informed by experiments in animals. As knowledge in this discipline has accumulated, from studies of humans and other animals, the complexity of interactions between genome, environment and epigenetics, has been revealed. The vast nature of programming stimuli and breadth of effects is becoming known. As a result of our accumulating knowledge we now appreciate the impact of many variables that contribute to programmed outcomes. To guide further animal research in this field, the Australia and New Zealand DOHaD society (ANZ DOHaD) Animals Models of DOHaD Research Working Group convened at the 2nd Annual ANZ DOHaD Congress in Melbourne, Australia in April 2015. This review summarizes the contributions of animal research to the understanding of DOHaD, and makes recommendations for the design and conduct of animal experiments to maximize relevance, reproducibility and translation of knowledge into improving health and well-being.
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Aliou Y, Liao MC, Zhao XP, Chang SY, Chenier I, Ingelfinger JR, Zhang SL. Post-weaning high-fat diet accelerates kidney injury, but not hypertension programmed by maternal diabetes. Pediatr Res 2016; 79:416-24. [PMID: 26571223 DOI: 10.1038/pr.2015.236] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 08/24/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND The aim of this study was to establish the underlying mechanisms by which a post-weaning high-fat diet (HFD) accelerates the perinatal programming of kidney injury occurring in the offspring of diabetic mothers. METHODS Male mice, offspring of nondiabetic and diabetic dams were fed with normal diet (ND) or HFD from 4 to 20 wk of age. Rat renal proximal tubular cells were used in vitro. RESULTS On ND, the offspring of dams with severe maternal diabetes had an intrauterine growth restriction (IUGR) phenotype and developed mild hypertension and evidence of kidney injury in adulthood. Exposing the IUGR offspring to HFD resulted in rapid weight gain, catch-up growth, and later to profound kidney injury with activation of renal TGFβ1 and collagen type IV expression, increased oxidative stress, and enhanced renal lipid deposition, but not systemic hypertension. Given our data, we speculate that HFD or free fatty acids may accelerate the process of perinatal programming of kidney injury, via increased CD36 and fatty acid-binding protein 4 expression, which may target reactive oxygen species, nuclear factor-kappa B, and TGFβ1 signaling in vivo and in vitro. CONCLUSION Early postnatal exposure to overnutrition with a HFD increases the risk of development of kidney injury, but not hypertension, in IUGR offspring of dams with maternal diabetes.
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Affiliation(s)
- Yessoufou Aliou
- Centre de recherche du Centre hospitalier de l'Universite de Montreal (CRCHUM), Universite de Montreal, Montréal, Quebec, Canada
| | - Min-Chun Liao
- Centre de recherche du Centre hospitalier de l'Universite de Montreal (CRCHUM), Universite de Montreal, Montréal, Quebec, Canada
| | - Xin-Ping Zhao
- Centre de recherche du Centre hospitalier de l'Universite de Montreal (CRCHUM), Universite de Montreal, Montréal, Quebec, Canada
| | - Shiao-Ying Chang
- Centre de recherche du Centre hospitalier de l'Universite de Montreal (CRCHUM), Universite de Montreal, Montréal, Quebec, Canada
| | - Isabelle Chenier
- Centre de recherche du Centre hospitalier de l'Universite de Montreal (CRCHUM), Universite de Montreal, Montréal, Quebec, Canada
| | - Julie R Ingelfinger
- Pediatric Nephrology Unit, Massachusetts General Hospital and Harvard Medical School Boston, Boston, Massachusetts
| | - Shao-Ling Zhang
- Centre de recherche du Centre hospitalier de l'Universite de Montreal (CRCHUM), Universite de Montreal, Montréal, Quebec, Canada
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Early‐life exercise may promote lasting brain and metabolic health through gut bacterial metabolites. Immunol Cell Biol 2016; 94:151-7. [DOI: 10.1038/icb.2015.113] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 11/28/2015] [Accepted: 11/29/2015] [Indexed: 12/11/2022]
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Reid DT, Eller LK, Nettleton JE, Reimer RA. Postnatal prebiotic fibre intake mitigates some detrimental metabolic outcomes of early overnutrition in rats. Eur J Nutr 2015; 55:2399-2409. [PMID: 26407845 DOI: 10.1007/s00394-015-1047-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 09/14/2015] [Indexed: 11/29/2022]
Abstract
PURPOSE Overnutrition during early development has been linked to metabolic disease and obesity in adulthood. Interventions to ameliorate this metabolic malprogramming are needed. Our objective was to determine whether prebiotic fibre would reduce weight gain and improve satiety hormone profiles in rats overnourished during the suckling period. METHODS Male Sprague-Dawley rats reared in small litter (SL 3 pups) or normal litter (NL 12 pups) were randomized at weaning to AIN-93 (control) or a 10 % oligofructose (OFS) diet for 16 weeks. Body composition, an oral glucose tolerance test for glucose and gut hormones, and gut microbiota were assessed. RESULTS At weaning, body weight was higher in SL than in NL rats (P < 0.03). At 19 weeks, body weight was lower with OFS than control (P < 0.04). There was a diet × litter size interaction wherein OFS in SL rats reduced body fat (%) to levels seen in NL rats (P < 0.05). OFS attenuated the glucose response in SL but not in NL rats (P < 0.015). Independent of litter size, OFS decreased total AUC for glucose-dependent insulinotropic polypeptide (P < 0.002) and increased total AUC for peptide YY (P < 0.01) and glucagon-like peptide-1 (P < 0.04) when compared to control. OFS, not litter size, played the predominant role in altering gut microbiota which included increased bifidobacteria and Akkermansia muciniphila with OFS. CONCLUSIONS Postnatal consumption of OFS by rats raised in SL was able to attenuate body fat and glycaemia to levels seen in NL rats. OFS appears to influence satiety hormone and gut microbiota response similarly in overnourished and control rats.
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Affiliation(s)
- Danielle T Reid
- Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
| | - Lindsay K Eller
- Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada.,Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Jodi E Nettleton
- Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
| | - Raylene A Reimer
- Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada. .,Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada.
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High Sucrose Intake Ameliorates the Accumulation of Hepatic Triacylglycerol Promoted by Restraint Stress in Young Rats. Lipids 2015; 50:1103-13. [PMID: 26399510 DOI: 10.1007/s11745-015-4066-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 08/17/2015] [Indexed: 02/06/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disorder. Stress promotes the onset of the NAFLD with a concomitant increment in the activity of the hepatic 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD-1). However, the interaction between the stress and a carbohydrate-enriched diet for the development of NAFLD in young animals is unknown. In the present study, we evaluated the impact of chronic stress on the hepatic triacylglycerol level of young rats fed or not with a high sucrose-diet. For doing this, 21-day old male Wistar rats were allocated into 4 groups: control (C), chronic restraint stress (St), high-sucrose diet (S30), and chronic restraint stress plus a 30 % sucrose diet (St + S30). Chronic restraint stress consisted of 1-hour daily session, 5 days per week and for 4 weeks. Rats were fed with a standard chow and tap water (C group) or 30 % sucrose diluted in water (S30 group). The St + S30 groups consumed less solid food but had an elevated visceral fat accumulation in comparison with the St group. The St group showed a high level of serum corticosterone and a high activity of the hepatic 11β-HSD-1 concomitantly to the augmentation of hepatic steatosis signs, a high hepatic triacylglycerol content, and hepatic oxidative stress. Conversely, the high-sucrose intake in stressed rats (St + S30 group) reduced the hepatic 11β-HSD-1 activity, the level of serum corticosterone, and the hepatic triacylglycerol content. Present findings show that a high-sucrose diet ameliorates the triacylglycerol accumulation in liver promoted by the restraint stress in young male rats.
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Early life obesity and chronic kidney disease in later life. Pediatr Nephrol 2015; 30:1255-63. [PMID: 25145270 DOI: 10.1007/s00467-014-2922-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/23/2014] [Accepted: 07/17/2014] [Indexed: 12/16/2022]
Abstract
The prevalence of chronic kidney disease (CKD) has increased considerably with a parallel rise in the prevalence of obesity. It is now recognized that early life nutrition has life-long effects on the susceptibility of an individual to develop obesity, diabetes, cardiovascular disease and CKD. The kidney can be programmed by a number of intrauterine and neonatal insults. Low birth weight (LBW) is one of the most identifiable markers of a suboptimal prenatal environment, and the important intrarenal factors sensitive to programming events include decreased nephron number and altered control of the renin-angiotensin system (RAS). LBW complicated by accelerated catch-up growth is associated with an increased risk of obesity, hypertension and CKD in later life. High birth weight and exposure to maternal diabetes or obesity can enhance the risk for developing CKD in later life. Rapid postnatal growth per se may also contribute to the subsequent development of obesity and CKD regardless of birth weight and prenatal nutrition. Although the mechanisms of renal risks due to early life nutritional programming remain largely unknown, experimental and clinical studies suggest the burdening role of early life obesity in longstanding cardiovascular and renal diseases.
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Mueller CA, Eme J, Burggren WW, Roghair RD, Rundle SD. Challenges and opportunities in developmental integrative physiology. Comp Biochem Physiol A Mol Integr Physiol 2015; 184:113-24. [PMID: 25711780 DOI: 10.1016/j.cbpa.2015.02.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 02/15/2015] [Accepted: 02/17/2015] [Indexed: 01/20/2023]
Abstract
This review explores challenges and opportunities in developmental physiology outlined by a symposium at the 2014 American Physiological Society Intersociety Meeting: Comparative Approaches to Grand Challenges in Physiology. Across animal taxa, adverse embryonic/fetal environmental conditions can alter morphological and physiological phenotypes in juveniles or adults, and capacities for developmental plasticity are common phenomena. Human neonates with body sizes at the extremes of perinatal growth are at an increased risk of adult disease, particularly hypertension and cardiovascular disease. There are many rewarding areas of current and future research in comparative developmental physiology. We present key mechanisms, models, and experimental designs that can be used across taxa to investigate patterns in, and implications of, the development of animal phenotypes. Intraspecific variation in the timing of developmental events can be increased through developmental plasticity (heterokairy), and could provide the raw material for selection to produce heterochrony--an evolutionary change in the timing of developmental events. Epigenetics and critical windows research recognizes that in ovo or fetal development represent a vulnerable period in the life history of an animal, when the developing organism may be unable to actively mitigate environmental perturbations. 'Critical windows' are periods of susceptibility or vulnerability to environmental or maternal challenges, periods when recovery from challenge is possible, and periods when the phenotype or epigenome has been altered. Developmental plasticity may allow survival in an altered environment, but it also has possible long-term consequences for the animal. "Catch-up growth" in humans after the critical perinatal window has closed elicits adult obesity and exacerbates a programmed hypertensive phenotype (one of many examples of "fetal programing"). Grand challenges for developmental physiology include integrating variation in developmental timing within and across generations, applying multiple stressor dosages and stressor exposure at different developmental timepoints, assessment of epigenetic and parental influences, developing new animal models and techniques, and assessing and implementing these designs and models in human health and development.
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Affiliation(s)
- C A Mueller
- Department of Biology, McMaster University, 1280 Main St. West, Hamilton, ON L8S 4K1, Canada.
| | - J Eme
- Department of Biology, McMaster University, 1280 Main St. West, Hamilton, ON L8S 4K1, Canada.
| | - W W Burggren
- Department of Biological Sciences, University of North Texas, 1155 Union Circle #305220, Denton, TX 76203, USA.
| | - R D Roghair
- Stead Family Department of Pediatrics, University of Iowa, 1270 CBRB JPP, Iowa City, IA 52242, USA.
| | - S D Rundle
- Marine Biology and Ecology Research Centre, Plymouth University, 611 Davy Building Drake Circus, Plymouth, Devon PL4 8AA, UK.
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Postnatal overfeeding promotes early onset and exaggeration of high-fat diet-induced nonalcoholic fatty liver disease through disordered hepatic lipid metabolism in rats. J Nutr Biochem 2014; 25:1108-1116. [PMID: 25154569 DOI: 10.1016/j.jnutbio.2014.06.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Revised: 04/01/2014] [Accepted: 06/13/2014] [Indexed: 01/03/2023]
Abstract
Exposure to overnutrition in critical or sensitive developmental periods may increase the risk of developing obesity and metabolic syndrome in adults. Nonalcoholic fatty liver disease (NAFLD) is the hepatic manifestation of the metabolic syndrome, but the relationship among postnatal nutrition, lipid metabolism, and NAFLD progression during development remains poorly understood. Here we investigated in a rat model whether postnatal overfeeding increases susceptibility to NAFLD in response to a high-fat diet. Litters from Sprague-Dawley dams were culled to three (small litters) or ten (normal litters) pups and then weaned onto a standard or high-fat diet at postnatal day 21 to generate normal-litter, small-litter, normal-litter/high-fat, and small-litter/high-fat groups. At age 16 weeks, the small-litter and both high-fat groups showed obesity, dyslipidemia, and insulin resistance. Hepatic disorders appeared earlier in the small-litter/high-fat rats with greater liver mass gain and higher hepatic triglycerides and steatosis score versus normal-litter/high-fat rats. Hepatic acetyl-CoA carboxylase activity and mRNA expression were increased in small-litter rats and aggravated in small-litter/high-fat rats but not in normal-litter/high-fat rats. The high expression in small-litter/high-fat rats coincided with high sterol regulatory element-binding protein-1c mRNA and protein expression. However, mRNA expression of enzymes involved in hepatic fatty acid oxidation (carnitine palmitoyltransferase 1) and output (microsomal triglyceride transfer protein) was decreased under a high-fat diet regardless of litter size. In conclusion, overfeeding related to small-litter rearing during lactation contributes to the NAFLD phenotype when combined with a high-fat diet, possibly through up-regulated hepatic lipogenesis.
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The influence of hypoxia during different pregnancy stages on cardiac collagen accumulation in the adult offspring. BIOMED RESEARCH INTERNATIONAL 2014; 2014:419805. [PMID: 25013780 PMCID: PMC4071786 DOI: 10.1155/2014/419805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 05/03/2014] [Accepted: 05/19/2014] [Indexed: 12/03/2022]
Abstract
We evaluated whether the timing of maternal hypoxia during pregnancy influenced cardiac extracellular matrix accumulation in the adult offspring. Rats in different periods of pregnancy were assigned to maternal hypoxia or control groups. Maternal hypoxia from day 3 to 21 of pregnancy or day 9 to 21 of pregnancy increased collagen I and collagen III expression in the left ventricle of adult offspring (both P < 0.05). Maternal hypoxia from day 15 to 21 of pregnancy had no effect on adult collagen levels. Our results indicate that maternal hypoxia at critical windows of cardiovascular development can induce pathological cardiac remodeling in the adult rat offspring.
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27
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Postnatal early overnutrition causes long-term renal decline in aging male rats. Pediatr Res 2014; 75:259-65. [PMID: 24232634 DOI: 10.1038/pr.2013.223] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 07/04/2013] [Indexed: 01/05/2023]
Abstract
BACKGROUND We evaluated the influence of postnatal early overnutrition on renal pathophysiological changes in aging rats. METHODS Three or 10 male pups per mother were assigned to either the small litter (SL) or normal litter (control) groups, respectively, during the first 21 d of life. The effects of early postnatal overnutrition were determined at 12 mo. RESULTS SL rats weighed more than controls between 4 d and 6 mo of age (P < 0.05). However, between 6 and 12 mo, body weights in both groups were not different. In the SL group, at 12 mo, systolic blood pressure was higher and creatinine clearance was lower than the same in controls (P < 0.05). Numbers of CD68 (ED1)-positive macrophages and apoptotic cells in renal cortex were higher in SL rats (P < 0.05). Furthermore, index scores for glomerulosclerosis and tubulointerstitial fibrosis were higher in the SL group (P < 0.05). Significantly less glomeruli per section area were found in aging SL rats (P < 0.05). Immunoblotting and immunohistochemistry showed decreased intrarenal renin expression in SL rats (P < 0.05). CONCLUSION Early postnatal overnutrition can potentiate structural and functional abnormalities in the aging kidney and can lead to systolic hypertension with reduced intrarenal renin activity.
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Developmental origins of chronic renal disease: an integrative hypothesis. Int J Nephrol 2013; 2013:346067. [PMID: 24073334 PMCID: PMC3773449 DOI: 10.1155/2013/346067] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 06/17/2013] [Accepted: 07/03/2013] [Indexed: 01/06/2023] Open
Abstract
Cardiovascular diseases are one of the leading causes of mortality. Hypertension (HT) is one of the principal risk factors associated with death. Chronic kidney disease (CKD), which is probably underestimated, increases the risk and the severity of adverse cardiovascular events. It is now recognized that low birth weight is a risk factor for these diseases, and this relationship is amplified by a rapid catch-up growth or overfeeding during infancy or childhood. The pathophysiological and molecular mechanisms involved in the “early programming” of CKD are multiple and partially understood. It has been proposed that the developmental programming of arterial hypertension and chronic kidney disease is related to a reduced nephron endowment. However, this mechanism is still discussed. This review discusses the complex relationship between birth weight and nephron endowment and how early growth and nutrition influence long term HT and CKD. We hypothesize that fetal environment reduces moderately the nephron number which appears insufficient by itself to induce long term diseases. Reduced nephron number constitutes a “factor of vulnerability” when additional factors, in particular a rapid postnatal growth or overfeeding, promote the early onset of diseases through a complex combination of various pathophysiological pathways.
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Spencer SJ. Perinatal programming of neuroendocrine mechanisms connecting feeding behavior and stress. Front Neurosci 2013; 7:109. [PMID: 23785312 PMCID: PMC3683620 DOI: 10.3389/fnins.2013.00109] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 05/31/2013] [Indexed: 01/24/2023] Open
Abstract
Feeding behavior is closely regulated by neuroendocrine mechanisms that can be influenced by stressful life events. However, the feeding response to stress varies among individuals with some increasing and others decreasing food intake after stress. In addition to the impact of acute lifestyle and genetic backgrounds, the early life environment can have a life-long influence on neuroendocrine mechanisms connecting stress to feeding behavior and may partially explain these opposing feeding responses to stress. In this review I will discuss the perinatal programming of adult hypothalamic stress and feeding circuitry. Specifically I will address how early life (prenatal and postnatal) nutrition, early life stress, and the early life hormonal profile can program the hypothalamic-pituitary-adrenal (HPA) axis, the endocrine arm of the body's response to stress long-term and how these changes can, in turn, influence the hypothalamic circuitry responsible for regulating feeding behavior. Thus, over- or under-feeding and/or stressful events during critical windows of early development can alter glucocorticoid (GC) regulation of the HPA axis, leading to changes in the GC influence on energy storage and changes in GC negative feedback on HPA axis-derived satiety signals such as corticotropin-releasing-hormone. Furthermore, peripheral hormones controlling satiety, such as leptin and insulin are altered by early life events, and can be influenced, in early life and adulthood, by stress. Importantly, these neuroendocrine signals act as trophic factors during development to stimulate connectivity throughout the hypothalamus. The interplay between these neuroendocrine signals, the perinatal environment, and activation of the stress circuitry in adulthood thus strongly influences feeding behavior and may explain why individuals have unique feeding responses to similar stressors.
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Affiliation(s)
- Sarah J Spencer
- School of Health Sciences and Health Innovations Research Institute, RMIT University Melbourne, VIC, Australia
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Habbout A, Li N, Rochette L, Vergely C. Postnatal overfeeding in rodents by litter size reduction induces major short- and long-term pathophysiological consequences. J Nutr 2013; 143:553-62. [PMID: 23446961 DOI: 10.3945/jn.112.172825] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Numerous studies have demonstrated that the early postnatal environment can influence body weight and energy homeostasis into adulthood. Rodents raised in small litters have been shown to be a useful experimental model to study the short- and long-term consequences of early overnutrition, which can lead to modifications not only in body weight but also of several metabolic features. Postnatal overfeeding (PNOF) induces early malprogramming of the hypothalamic system, inducing acquired persisting central leptin and insulin resistance and an increase in orexigenic signals. Visceral white adipose tissue, lipogenic activity, and inflammatory status are increased in PNOF rodents, while brown adipose tissue shows reduced thermogenic activity. Pancreatic and hepatic glucose responsiveness is persistently reduced in PNOF rodents, which also frequently present disturbances in plasma lipids. PNOF rodents present increased circulating concentrations of leptin, elevated corticosterone secretion, and significant changes in glucocorticoid sensitivity. PNOF also influences nephrogenesis and renal maturation. Increased oxidative stress is also described in circulating blood and in some tissues, such as the heart or liver. At the cardiovascular level, a moderate increase in arterial blood pressure is sometimes observed and rapid cardiac hypertrophy is observed at weaning; however, during maturation, impaired contractility and fibrosis are observed. Myocardial genome expression is rapidly modified in overfed mice. Moreover, hearts of PNOF rodents are more sensitive to ischemia-reperfusion injury. Together, these results suggest that the nutritional state in the immediate postnatal period should be taken into account, because it may have an impact on cardiometabolic risk in adulthood.
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Affiliation(s)
- Ahmed Habbout
- Inserm UMR866, LPPCM, Faculties of Medicine and Pharmacy, University of Burgundy, Dijon, France
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31
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Viana L, Lima C, Oliveira M, Borges R, Cardoso T, Almeida I, Diniz D, Bento-Torres J, Pereira A, Batista-de-Oliveira M, Lopes A, Silva R, Abadie-Guedes R, Amâncio dos Santos A, Lima D, Vasconcelos P, Cunningham C, Guedes R, Picanço-Diniz C. Litter size, age-related memory impairments, and microglial changes in rat dentate gyrus: Stereological analysis and three dimensional morphometry. Neuroscience 2013; 238:280-96. [DOI: 10.1016/j.neuroscience.2013.02.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 02/12/2013] [Accepted: 02/12/2013] [Indexed: 10/27/2022]
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32
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Roberts MD, Brown JD, Company JM, Oberle LP, Heese AJ, Toedebusch RG, Wells KD, Cruthirds CL, Knouse JA, Ferreira JA, Childs TE, Brown M, Booth FW. Phenotypic and molecular differences between rats selectively bred to voluntarily run high vs. low nightly distances. Am J Physiol Regul Integr Comp Physiol 2013; 304:R1024-35. [PMID: 23552494 DOI: 10.1152/ajpregu.00581.2012] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The purpose of the present study was to partially phenotype male and female rats from generations 8-10 (G8-G10) that had been selectively bred to possess low (LVR) vs. high voluntary running (HVR) behavior. Over the first 6 days with wheels, 34-day-old G8 male and female LVRs ran shorter distances (P < 0.001), spent less time running (P < 0.001), and ran slower (P < 0.001) than their G8 male and female HVR counterparts, respectively. HVR and LVR lines consumed similar amounts of standard chow with or without wheels. No inherent difference existed in PGC-1α mRNA in the plantaris and soleus muscles of LVR and HVR nonrunners, although G8 LVR rats inherently possessed less NADH-positive superficial plantaris fibers compared with G8 HVR rats. While day 28 body mass tended to be greater in both sexes of G9-G10 LVR nonrunners vs. G9-G10 HVR nonrunners (P = 0.06), body fat percentage was similar between lines. G9-G10 HVRs had fat mass loss after 6 days of running compared with their prerunning values, while LVR did not lose or gain fat mass during the 6-day voluntary running period. RNA deep sequencing efforts in the nucleus accumbens showed only eight transcripts to be >1.5-fold differentially expressed between lines in HVR and LVR nonrunners. Interestingly, HVRs presented less Oprd1 mRNA, which ties in to potential differences in dopaminergic signaling between lines. This unique animal model provides further evidence as to how exercise may be mechanistically regulated.
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Affiliation(s)
- Michael D Roberts
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA
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33
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de Oliveira JC, Lisboa PC, de Moura EG, Barella LF, Miranda RA, Malta A, Franco CCDS, Ribeiro TADS, Torrezan R, Gravena C, Mathias PCDF. Poor pubertal protein nutrition disturbs glucose-induced insulin secretion process in pancreatic islets and programs rats in adulthood to increase fat accumulation. J Endocrinol 2013; 216:195-206. [PMID: 23151360 DOI: 10.1530/joe-12-0408] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Similar to gestation/lactation, puberty is also a critical phase in which neuronal connections are still being produced and during which metabolic changes may occur if nutrition is disturbed. In the present study we aimed to determine whether peripubertal protein restriction induces metabolic programming. Thirty-day-old male rats were fed either a low protein (LP group) diet (4% w/w protein) or a normal protein (NP group) diet (23%) until 60 days of age, when they received the NP diet until they were 120 days old. Body weight (BW), food intake, fat tissue accumulation, glucose tolerance, and insulin secretion were evaluated. The nerve electrical activity was recorded to evaluate autonomous nervous system (ANS) function. Adolescent LP rats presented hypophagia and lower BW gain during the LP diet treatment (P<0.001). However, the food intake and BW gain by the LP rats were increased (P<0.001) after the NP diet was resumed. The LP rats presented mild hyperglycemia, hyperinsulinemia, severe hyperleptinemia upon fasting, peripheral insulin resistance and increased fat tissue accumulation and vagus nerve activity (P<0.05). Glucose-induced insulin secretion was greater in the LP islets than in the NP islets; however, the cholinergic response was decreased (P<0.05). Compared with the islets from the NP rats, the LP islets showed changes in the activity of muscarinic receptors (P<0.05); in addition, the inhibition of glucose-induced insulin secretion by epinephrine was attenuated (P<0.001). Protein restriction during adolescence caused high-fat tissue accumulation in adult rats. Islet dysfunction could be related to an ANS imbalance.
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Affiliation(s)
- Júlio Cezar de Oliveira
- Laboratory of Secretion Cell Biology, Department of Cell Biology and Genetics, State University of Maringá, Block H67, Room 19, Colombo Avenue 5970, 87020-900 Maringá, Paraná, Brazil
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Granado M, Fernández N, Monge L, Figueras JC, Carreño-Tarragona G, Amor S, García-Villalón AL. Effects of coronary ischemia-reperfusion in a rat model of early overnutrition. Role of angiotensin receptors. PLoS One 2013; 8:e54984. [PMID: 23383303 PMCID: PMC3562319 DOI: 10.1371/journal.pone.0054984] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Accepted: 12/18/2012] [Indexed: 11/19/2022] Open
Abstract
Background Obesity during childhood has dramatically increased worldwide in the last decades. Environmental factors acting early in life, including nutrition, play an important role in the pathogenesis of obesity and cardiovascular diseases in adulthood. Aims To analyze the effects of early overfeeding on the heart and coronary circulation, the effect of ischemia-reperfusion (I/R) and the role of the renin-angiotensin system (RAS) were studied in isolated hearts from control and overfed rats during lactation. Methods and Results On the day of birth litters were adjusted to twelve pups per mother (control) or to three pups per mother (overfed). At weaning (21 days) the rats were killed and the heart perfused in a Langendorff system and subjected to 30 min of ischemia followed by 15 min of reperfusion. The contractility (left developed intraventricular pressure) was lower in the hearts from overfed rats, and was reduced by I/R in hearts from control but not from overfed rats. I/R also reduced the coronary vasoconstriction to angiotensin II more in hearts from control than from overfed rats, and the vasodilatation to bradykinin similarly in both experimental groups. The expression of both angiotensin AGTRa and AGTR2 receptors was increased in the myocardium of overfed rats, and I/R increased the expression of both receptors in control rats but reduced it in overfed rats. The expression of apoptotic and antiapoptotic markers was increased in hearts of overfed rats compared with control, and further increased by I/R. Conclusions These results suggest that both overfeeding and I/R impair cardiac and coronary function due, at least in part, to activation of the angiotensin pathway. However, overfeeding may reduce the impairment of ventricular contractility by I/R.
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Affiliation(s)
- Miriam Granado
- Department of Physiology, Faculty of Medicine, Universidad Autónoma de Madrid, Madrid, Spain
- CIBER Fisiopatología de Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Nuria Fernández
- Department of Physiology, Faculty of Medicine, Universidad Autónoma de Madrid, Madrid, Spain
| | - Luis Monge
- Department of Physiology, Faculty of Medicine, Universidad Autónoma de Madrid, Madrid, Spain
| | - Juan Carlos Figueras
- Department of Physiology, Faculty of Medicine, Universidad Autónoma de Madrid, Madrid, Spain
| | | | - Sara Amor
- Department of Physiology, Faculty of Medicine, Universidad Autónoma de Madrid, Madrid, Spain
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Picó C, Palou M, Priego T, Sánchez J, Palou A. Metabolic programming of obesity by energy restriction during the perinatal period: different outcomes depending on gender and period, type and severity of restriction. Front Physiol 2012. [PMID: 23189059 PMCID: PMC3504314 DOI: 10.3389/fphys.2012.00436] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Epidemiological studies in humans and controlled intervention studies in animals have shown that nutritional programming in early periods of life is a phenomenon that affects metabolic and physiological functions throughout life. The phenotypes of health or disease are hence the result of the interaction between genetic and environmental factors, starting right from conception. In this sense, gestation and lactation are disclosed as critical periods. Continuous food restriction during these stages may lead to permanent adaptations with lasting effects on the metabolism of the offspring and may influence the propensity to develop different chronic diseases associated with obesity. However, the different outcomes of these adaptations on later health may depend on factors such as the type, duration, period, and severity of the exposure to energy restriction conditions, and they are, in part, gender specific. A better understanding of the factors and mechanisms involved in metabolic programming, and their effects, may contribute significantly to the prevention of obesity, which is considered to be one of the major health concerns of our time. Here, the different outcomes of maternal food restriction during gestation and lactation in the metabolic health of offspring, as well as potential mechanisms underlying these effects are reviewed.
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Affiliation(s)
- Catalina Picó
- Laboratory of Molecular Biology, Nutrition and Biotechnology (Nutrigenomics), University of the Balearic Islands, and CIBER de Fisiopatología de la Obesidad y Nutrición Spain
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Hou M, Ji C, Wang J, Liu Y, Sun B, Guo M, Burén J, Li X. The effects of dietary fatty acid composition in the post-sucking period on metabolic alterations in adulthood: can ω3 polyunsaturated fatty acids prevent adverse programming outcomes? J Endocrinol 2012; 215:119-27. [PMID: 22847675 DOI: 10.1530/joe-12-0191] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Early life nutrition is important in the regulation of metabolism in adulthood. We studied the effects of different fatty acid composition diets on adiposity measures, glucose tolerance, and peripheral glucocorticoid (GC) metabolism in overfed neonatal rats. Rat litters were adjusted to a litter size of three (small litters (SLs)) or ten (normal litters (NLs)) on postnatal day 3 to induce overfeeding or normal feeding respectively. After weaning, SL and NL rats were fed a ω6 polyunsaturated fatty acid (PUFA) diet (14% calories as fat, soybean oil) or high-saturated fatty acid (high-fat; 31% calories as fat, lard) diet until postnatal week 16 respectively. SL rats were also divided into the third group fed a ω3 PUFA diet (14% calories as fat, fish oil). A high-fat diet induced earlier and/or more pronounced weight gain, hyperphagia, glucose intolerance, and hyperlipidemia in SL rats compared with NL rats. In addition, a high-fat diet increased 11β-hsd1 (Hsd11b1) mRNA expression and activity in the retroperitoneal adipose tissue of both litter groups compared with standard chow counterparts, whereas high-fat feeding increased hepatic 11β-hsd1 mRNA expression and activity only in SL rats. SL and a high-fat diet exhibited significant interactions in both retroperitoneal adipose tissue and hepatic 11β-HSD1 activity. Dietary ω3 PUFA offered protection against glucose intolerance and elevated GC exposure in the retroperitoneal adipose tissue and liver of SL rats. Taken together, the results suggest that dietary fatty acid composition in the post-sucking period may interact with neonatal feeding and codetermine metabolic alterations in adulthood.
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Affiliation(s)
- Miao Hou
- Department of Child Health Care, Nanjing Children's Hospital, Nanjing Medical University, Nanjing 210008, People's Republic of China
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Stocker CJ, Wargent ET, Martin-Gronert MS, Cripps RL, O'Dowd JF, Zaibi MS, Cottrell EC, Mercer JG, Duncan JS, Cawthorne MA, Ozanne SE, Arch JRS. Leanness in postnatally nutritionally programmed rats is associated with increased sensitivity to leptin and a melanocortin receptor agonist and decreased sensitivity to neuropeptide Y. Int J Obes (Lond) 2012; 36:1040-6. [PMID: 22124449 PMCID: PMC3378483 DOI: 10.1038/ijo.2011.226] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Pups of normally nourished dams that are cross-fostered after birth to dams fed a low-protein (8% by weight) diet (postnatal low protein (PLP)) grow slower during the suckling period and remain small and lean throughout adulthood. At weaning, they have increased expression in the arcuate nucleus (ARC) of the hypothalamus of the orexigenic neuropeptide Y (NPY) and decreased expression of pro-opiomelanocortin, the precursor of anorexigenic melanocortins. OBJECTIVES AND METHODS We investigated, using third ventricle administration, whether 3-month-old male PLP rats display altered sensitivity to leptin with respect to food intake, NPY and the melanocortin 3/4-receptor agonist MTII, and using in situ hybridization or laser capture microdissection of the ARC followed by RT-PCR, whether the differences observed were associated with changes in the hypothalamic expression of NPY or the leptin receptor, NPY receptors and melanocortin receptors. RESULTS PLP rats were smaller and had reduced percentage body fat content and plasma leptin concentration compared with control rats. Leptin (5 μg) reduced food intake over 0-48 h more in PLP than control rats (P<0.05). Submaximal doses of NPY increased the food intake less in PLP rats than in controls, whereas submaximal doses of MTII reduced the food intake more in PLP rats. Maximal responses did not differ between PLP and control rats. Leptin and melanocortin-3 receptor (MC3R) expression were increased in both ARC and ventromedial hypothalamic nuclei in PLP animals compared with the controls. MC4R, NPY Y1R, Y5R and NPY expression were unchanged. CONCLUSION Postnatal undernourishment results in food intake in adult rats being more sensitive to reduction by leptin and melanocortins, and less sensitive to stimulation by NPY. We propose that this contributes to increased leptin sensitivity and resistance to obesity. Increased expression of ObRb and MC3R may partly explain these findings but other downstream mechanisms must also be involved.
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Affiliation(s)
- C J Stocker
- Clore Laboratory, University of Buckingham, Buckingham, UK.
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Fuente-Martín E, García-Cáceres C, Granado M, Sánchez-Garrido MA, Tena-Sempere M, Frago LM, Argente J, Chowen JA. Early postnatal overnutrition increases adipose tissue accrual in response to a sucrose-enriched diet. Am J Physiol Endocrinol Metab 2012; 302:E1586-98. [PMID: 22510708 DOI: 10.1152/ajpendo.00618.2011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Both overnutrition and an incorrect nutrient balance have contributed to the rise in obesity. Moreover, it is now clear that poor nutrition during early life augments the possibility of excess weight gain in later years. Our aim was to determine how neonatal overnutrition affects later responses to a sucrose-enriched diet and whether this varies depending upon when the diet is introduced in postnatal life. Male Wistar rats raised in litters of four or 12 pups were given a 33% sucrose solution instead of water from weaning (day 21) or postnatal day (PND) 65. All rats received normal chow ad libitum until they were euthanized on PND 80. Body weight (BW) and food and liquid intake were monitored throughout the study. Fat mass, adipocyte morphology, serum biochemical and hormonal parameters, and hypothalamic neuropeptide mRNA levels were measured at study termination. Neonatal overnutrition increased food intake, BW, and leptin levels, induced adipocyte hypertrophy, and decreased total ghrelin levels. The sucrose-enriched diet increased total energy intake, adipose accrual, and leptin, adiponectin, and acylated ghrelin levels but decreased BW. Most of these responses were accentuated in neonatally overnourished rats, which also had increased insulin and triglyceride levels. However, long-term sucrose intake induced adipocyte hypertrophy in rats from normal-sized litters but not in neonatally overfed rats. The results reported here indicate that neonatal overnutrition increases the detrimental response to a diet rich in sucrose later in life. Moreover, the timing and duration of the exposure to a sucrose-enriched diet alter the adverse metabolic outcomes.
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Affiliation(s)
- Esther Fuente-Martín
- Hospital Infantil Universitario Niño Jesús, Department of Endocrinology, Instituto de Investigación Sanitaria La Princesa, Madrid, Spain
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Fuente-Martín E, Granado M, García-Cáceres C, Sanchez-Garrido MA, Frago LM, Tena-Sempere M, Argente J, Chowen JA. Early nutritional changes induce sexually dimorphic long-term effects on body weight gain and the response to sucrose intake in adult rats. Metabolism 2012; 61:812-22. [PMID: 22209665 DOI: 10.1016/j.metabol.2011.11.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 10/19/2011] [Accepted: 11/05/2011] [Indexed: 12/12/2022]
Abstract
Long-term metabolic effects induced by early nutritional changes are suspected to differ between males and females, but few studies have analyzed both sexes simultaneously. We analyzed the consequences of neonatal nutritional changes on body weight (BW) and the adult response to a sucrose-enriched diet in both male and female rats. Litter size was manipulated at birth to induce over- and undernutrition (4 pups: L4; 12 pups: L12; 20 pups: L20). From 50 to 65 days of age, half of each group received a 33% sucrose solution instead of water. Serum leptin, insulin, and ghrelin levels were analyzed at day 65. At weaning, rats from L4 weighed more and those from L20 weighed less than controls (L12). Body weight was greater in L4 rats throughout the study and increased further compared with controls in adult life. L20 males ate less and gained less weight throughout the study, but L20 females had a significant catch-up in BW. Sucrose intake increased total energy consumption in all groups, but not BW gain, with L4 males and L4 and L20 females reducing weight gain. Yet, sucrose intake increased serum leptin levels, with this increase being significant in L4 and L20 males. Our results suggest that females are more capable than males of recuperating and maintaining a normal BW after reduced neonatal nutrition. Furthermore, increased sucrose intake does not increase BW, but could alter body composition as reflected by leptin levels, with the percentage of calories consumed in the form of sucrose being affected by sex and neonatal nutrition.
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Affiliation(s)
- Esther Fuente-Martín
- Hospital Infantil Universitario Niño Jesús, Department of Endocrinology, Instituto de Investigación La Princesa, Madrid, Spain
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Hou M, Liu Y, Zhu L, Sun B, Guo M, Burén J, Li X. Neonatal overfeeding induced by small litter rearing causes altered glucocorticoid metabolism in rats. PLoS One 2011; 6:e25726. [PMID: 22073140 PMCID: PMC3208550 DOI: 10.1371/journal.pone.0025726] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 09/09/2011] [Indexed: 11/18/2022] Open
Abstract
Elevated glucocorticoid (GC) activity may be involved in the development of the metabolic syndrome. Tissue GC exposure is determined by the tissue-specific GC-activating enzyme 11β-hydroxysteriod dehydrogenase type 1 (11β-HSD1) and the GC-inactivating enzyme 5α-reductase type 1 (5αR1), as well as 5β-reductase (5βR). Our aim was to study the effects of neonatal overfeeding induced by small litter rearing on the expression of GC-regulating enzymes in adipose tissue and/or liver and on obesity-related metabolic disturbances during development. Male Sprague-Dawley rat pup litters were adjusted to litter sizes of three (small litters, SL) or ten (normal litters, NL) on postnatal day 3 and then given standard chow from postnatal week 3 onward (W3). Small litter rearing induced obesity, hyperinsulinemia, and higher circulating corticosterone in adults. 11β-HSD1 expression and enzyme activity in retroperitoneal, but not in epididymal, adipose tissue increased with postnatal time and peaked at W5/W6 in both groups before declining. From W8, 11β-HSD1 expression and enzyme activity levels in retroperitoneal fat persisted at significantly higher levels in SL compared to NL rats. Hepatic 11β-HSD1 enzyme activity in SL rats was elevated from W3 to W16 compared to NL rats. Hepatic 5αR1 and 5βR expression was higher in SL compared to NL rats after weaning until W6, whereupon expression decreased in the SL rats and remained similar to that in NL rats. In conclusion, small litter rearing in rats induced peripheral tissue-specific alterations in 11β-HSD1 expression and activity and 5αR1 and 5βR expression during puberty, which could contribute to elevated tissue-specific GC exposure and aggravate the development of metabolic dysregulation in adults.
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Affiliation(s)
- Miao Hou
- Department of Children Health Care, Nanjing Medical University, Nanjing Children's Hospital, Nanjing, China
| | - Yanhua Liu
- Department of Children Health Care, Nanjing Medical University, Nanjing Children's Hospital, Nanjing, China
| | - Lijun Zhu
- Department of Children Health Care, Nanjing Medical University, Nanjing Children's Hospital, Nanjing, China
| | - Bin Sun
- Department of General Surgery, Nanjing Medical University, Nanjing Children's Hospital, Nanjing, China
| | - Mei Guo
- Institute of Pediatric Research, Nanjing Medical University, Nanjing, China
| | - Jonas Burén
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Xiaonan Li
- Department of Children Health Care, Nanjing Medical University, Nanjing Children's Hospital, Nanjing, China
- Institute of Pediatric Research, Nanjing Medical University, Nanjing, China
- * E-mail:
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Habbout A, Delemasure S, Goirand F, Guilland JC, Chabod F, Sediki M, Rochette L, Vergely C. Postnatal overfeeding in rats leads to moderate overweight and to cardiometabolic and oxidative alterations in adulthood. Biochimie 2011; 94:117-24. [PMID: 21978927 DOI: 10.1016/j.biochi.2011.09.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Accepted: 09/22/2011] [Indexed: 12/27/2022]
Abstract
In contrast to the masses of data on obesity, few data are available concerning the cardiometabolic and oxidative consequences of moderate overweight. The model of postnatal overfeeding (OF) induces an increase in body weight at weaning that remains during adult life. Litters of Wistar rats were either maintained at 12 pups (normal-fed group, NF), or reduced to 3 pups at birth in order to induce OF. At 6 months of age, metabolic parameters, circulating oxidative stress and aortic and coronary vasoreactivity were assessed. Cardiac susceptibility to ischemia-reperfusion injury was also evaluated ex vivo as were markers of cardiac remodeling. OF led to an increase in body weight at weaning (+50%); the increase in body weight persisted throughout adult life, but was less marked (+10%). Significant increases in plasma levels of fasting glucose, insulin and leptin were found in OF rats. An increase in both plasma hydroperoxides and cardiac superoxide dismutase activity and a decrease in plasma ascorbate were found in OF rats. Vasoreactivity was not modified, but ex vivo, after 30 min of ischemia, isolated hearts from OF rats showed lower recovery of coronary flow along with a greater release of LDH. Studies on heart tissues showed an increase in collagen content and increased expression and activity of MMP-2. Our findings show that moderate overweight in adult rats, induced by postnatal overfeeding, leads to both metabolic and oxidative disturbances as well as a higher susceptibility to cardiac injury after ischemia ex vivo, which may be explained, at least in part, by ventricular remodeling.
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Affiliation(s)
- Ahmed Habbout
- Laboratoire de Physiopathologie et Pharmacologie Cardiovasculaires Expérimentales (EA2979), Facultés de Médecine et Pharmacie, IFR SANTE-STIC, Université de Bourgogne, 7 boulevard Jeanne d'Arc, 21000 Dijon, France
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Velkoska E, Morris MJ. Mechanisms behind early life nutrition and adult disease outcome. World J Diabetes 2011; 2:127-32. [PMID: 21954416 PMCID: PMC3180529 DOI: 10.4239/wjd.v2.i8.127] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 08/11/2011] [Accepted: 08/14/2011] [Indexed: 02/05/2023] Open
Abstract
Obesity is increasing around the globe. While adult lifestyle factors undoubtedly contribute to the incidence of obesity and its attendant disorders, mounting evidence suggests that programming of obesity may occur following under- and over-nutrition during development. As hypothalamic control of appetite and energy expenditure is set early in life and can be perturbed by certain exposures such as undernutrition and altered metabolic and hormonal signals, in utero exposure to altered maternal nutrition and inadequate nutrition during early postnatal life may contribute to programming of obesity in offspring. Data from animal studies indicate both intrauterine and postnatal environments are critical determinants of the development of pathways regulating energy homeostasis. This review summarizes recent evidence of the impact of maternal nutrition as well as postnatal nutrition of the offspring on subsequent obesity and disease risk of the offspring. While much of the experimental work reviewed here was conducted in the rodent, these observations provide useful insights into avenues for future research into developing preventive measures to curb the obesity epidemic.
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Affiliation(s)
- Elena Velkoska
- Elena Velkoska, Department of Medicine, The University of Melbourne, Heidelberg Repatriation Hospital, Heidelberg Heights, 3081, Victoria, Australia
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Kolb AF, Huber RC, Lillico SG, Carlisle A, Robinson CJ, Neil C, Petrie L, Sorensen DB, Olsson IAS, Whitelaw CBA. Milk lacking α-casein leads to permanent reduction in body size in mice. PLoS One 2011; 6:e21775. [PMID: 21789179 PMCID: PMC3138747 DOI: 10.1371/journal.pone.0021775] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Accepted: 06/11/2011] [Indexed: 01/01/2023] Open
Abstract
The major physiological function of milk is the transport of amino acids, carbohydrates, lipids and minerals to mammalian offspring. Caseins, the major milk proteins, are secreted in the form of a micelle consisting of protein and calcium-phosphate. We have analysed the role of the milk protein α-casein by inactivating the corresponding gene in mice. Absence of α-casein protein significantly curtails secretion of other milk proteins and calcium-phosphate, suggesting a role for α-casein in the establishment of casein micelles. In contrast, secretion of albumin, which is not synthesized in the mammary epithelium, into milk is not reduced. The absence of α-casein also significantly inhibits transcription of the other casein genes. α-Casein deficiency severely delays pup growth during lactation and results in a life-long body size reduction compared to control animals, but has only transient effects on physical and behavioural development of the pups. The data support a critical role for α-casein in casein micelle assembly. The results also confirm lactation as a critical window of metabolic programming and suggest milk protein concentration as a decisive factor in determining adult body weight.
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Affiliation(s)
- Andreas F Kolb
- Molecular Recognition Group, Hannah Research Institute, Ayr, United Kingdom.
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Berthoud HR, Lenard NR, Shin AC. Food reward, hyperphagia, and obesity. Am J Physiol Regul Integr Comp Physiol 2011; 300:R1266-77. [PMID: 21411768 PMCID: PMC3119156 DOI: 10.1152/ajpregu.00028.2011] [Citation(s) in RCA: 152] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Accepted: 03/11/2011] [Indexed: 01/14/2023]
Abstract
Given the unabated obesity problem, there is increasing appreciation of expressions like "my eyes are bigger than my stomach," and recent studies in rodents and humans suggest that dysregulated brain reward pathways may be contributing not only to drug addiction but also to increased intake of palatable foods and ultimately obesity. After describing recent progress in revealing the neural pathways and mechanisms underlying food reward and the attribution of incentive salience by internal state signals, we analyze the potentially circular relationship between palatable food intake, hyperphagia, and obesity. Are there preexisting individual differences in reward functions at an early age, and could they be responsible for development of obesity later in life? Does repeated exposure to palatable foods set off a cascade of sensitization as in drug and alcohol addiction? Are reward functions altered by secondary effects of the obese state, such as increased signaling through inflammatory, oxidative, and mitochondrial stress pathways? Answering these questions will significantly impact prevention and treatment of obesity and its ensuing comorbidities as well as eating disorders and drug and alcohol addiction.
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Affiliation(s)
- Hans-Rudolf Berthoud
- Neurobiology of Nutrition Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, 70808, USA.
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Zhang XY, Zhang Q, Wang DH. Litter size variation in hypothalamic gene expression determines adult metabolic phenotype in Brandt's voles (Lasiopodomys brandtii). PLoS One 2011; 6:e19913. [PMID: 21637839 PMCID: PMC3102676 DOI: 10.1371/journal.pone.0019913] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2010] [Accepted: 04/19/2011] [Indexed: 11/18/2022] Open
Abstract
Background Early postnatal environments may have long-term and potentially irreversible consequences on hypothalamic neurons involved in energy homeostasis. Litter size is an important life history trait and negatively correlated with milk intake in small mammals, and thus has been regarded as a naturally varying feature of the early developmental environment. Here we investigated the long-term effects of litter size on metabolic phenotype and hypothalamic neuropeptide mRNA expression involved in the regulation of energy homeostasis, using the offspring reared from large (10–12) and small (3–4) litter sizes, of Brandt's voles (Lasiopodomys brandtii), a rodent species from Inner Mongolia grassland in China. Methodology/Principal Findings Hypothalamic leptin signaling and neuropeptides were measured by Real-Time PCR. We showed that offspring reared from small litters were heavier at weaning and also in adulthood than offspring from large litters, accompanied by increased food intake during development. There were no significant differences in serum leptin levels or leptin receptor (OB-Rb) mRNA in the hypothalamus at weaning or in adulthood, however, hypothalamic suppressor of cytokine signaling 3 (SOCS3) mRNA in adulthood increased in small litters compared to that in large litters. As a result, the agouti-related peptide (AgRP) mRNA increased in the offspring from small litters. Conclusions/Significance These findings support our hypothesis that natural litter size has a permanent effect on offspring metabolic phenotype and hypothalamic neuropeptide expression, and suggest central leptin resistance and the resultant increase in AgRP expression may be a fundamental mechanism underlying hyperphagia and the increased risk of overweight in pups of small litters. Thus, we conclude that litter size may be an important and central determinant of metabolic fitness in adulthood.
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Affiliation(s)
- Xue-Ying Zhang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Qiang Zhang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Graduate School of Chinese Academy of Sciences, Beijing, China
| | - De-Hua Wang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- * E-mail:
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Simeoni U, Ligi I, Buffat C, Boubred F. Adverse consequences of accelerated neonatal growth: cardiovascular and renal issues. Pediatr Nephrol 2011; 26:493-508. [PMID: 20938692 DOI: 10.1007/s00467-010-1648-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Revised: 07/12/2010] [Accepted: 07/26/2010] [Indexed: 12/13/2022]
Abstract
Epidemiological and experimental studies show that the risk of cardiovascular and metabolic diseases at adulthood is inversely related to the weight at birth. Although with less evidence, low birth weight has been suggested to increase the risk of chronic kidney disease (CKD). It is well established that the developmental programming of arterial hypertension and of renal disease involves in particular renal factors, especially nephron endowment, which is reduced in low birth weight and maternal diabetes situations. Experimental studies, especially in rodents, have demonstrated the long-term influence of postnatal nutrition and/or postnatal growth on cardiovascular, metabolic and renal functions, while human data are scarce on this issue. Vascular and renal diseases appear to have a "multihits" origin, with reduced nephron number the initial hit and rapid postnatal growth the second hit. This review addresses the current understanding of the role of the kidney, both as a mechanism and as a target, in the developmental origins of adult disease theory, with a particular focus on the long-term effects of postnatal growth and nutrition.
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Affiliation(s)
- Umberto Simeoni
- Division of Neonatology, Hôpital la Conception, Assistance Publique-Hôpitaux de Marseille, 147 Boulevard Baille, 13385, Marseille, France.
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Early weaning causes undernutrition for a short period and programmes some metabolic syndrome components and leptin resistance in adult rat offspring. Br J Nutr 2011; 105:1405-13. [DOI: 10.1017/s0007114510005064] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Maternal malnutrition during lactation programmes for overweight and central leptin resistance in adulthood. The inhibition of lactation by maternal treatment with bromocriptine (a prolactin inhibitor) programmes for obesity, hyperleptinaemia and leptin resistance. Here, we evaluated the short- and long-term effects of early weaning (EW) on body-weight regulation, leptin signalling, and hormone and lipid profiles in rats offspring. Lactating rats were separated into two groups: EW – dams were wrapped with a bandage to interrupt the lactation in the last 3 d of lactation; control – dams whose pups had free access to milk during all lactation (21 d). Data were significant at P < 0·05. At weaning, EW pups presented lower body weight ( − 10 %), length ( − 4 %), visceral fat ( − 40 %), total fat ( − 30 %), serum leptin ( − 73 %), glycaemia ( − 10 %), serum insulin ( − 20 %) and insulin resistance index (IRI; − 30 %), but higher total body protein content (+40 %). At 180 d, EW offspring showed hyperphagia, higher length (+3 %), body weight (+8 %), visceral and total fat (+36 and 84 %), serum TAG (+96 %), glycaemia (+15 %), leptinaemia (+185 %) and IRI (+29 %); however, they showed lower total protein content ( − 23 %), leptin:body fat ratio (41 %), prolactinaemia ( − 38 %) and adiponectinaemia ( − 59 %). Despite unchanged leptin receptor (OB-R) and signal transducer and activator of transcription 3 (STAT3), they displayed lower hypothalamic janus tyrosine kinase 2, phosphorylated STAT3 and a higher suppressor of cytokine signalling 3 levels, suggesting a central leptin resistance. Adult rats that were early weaned displayed higher adiposity, insulin resistance and dyslipidaemia, which are related to metabolic syndrome development. Our model reinforces the idea that neonatal malnutrition caused by shortening of the lactation period is important for metabolic programming of future diseases.
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Gilbert M, MacPhail R, Baldwin J, Moser V, Chernoff N. Moderate developmental undernutrition: Impact on growth and cognitive function in youth and old age. Neurotoxicol Teratol 2010; 32:362-72. [DOI: 10.1016/j.ntt.2009.12.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 10/29/2009] [Accepted: 12/21/2009] [Indexed: 01/02/2023]
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Biddinger JE, Fox EA. Meal parameters and vagal gastrointestinal afferents in mice that experienced early postnatal overnutrition. Physiol Behav 2010; 101:184-91. [PMID: 20403369 DOI: 10.1016/j.physbeh.2010.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Revised: 03/25/2010] [Accepted: 04/12/2010] [Indexed: 10/19/2022]
Abstract
Early postnatal overnutrition results in a predisposition to develop obesity due in part to hypothalamic and sympathetic dysfunction. Potential involvement of another major regulatory system component--the vagus nerve--has not been examined. Moreover, feeding disturbances have rarely been investigated prior to development of obesity when confounds due to obesity are minimized. To examine these issues, litters were culled on the day of birth to create small litters (SL; overnutrition), or normal size litters (NL; normal nutrition). Body weight, fat pad weight, meal patterns, and vagal sensory duodenal innervation were compared between SL and NL adult mice prior to development of obesity. Meal patterns were studied 18 h/day for 3 weeks using a balanced diet. Then vagal mechanoreceptors were labeled using anterograde transport of wheatgerm agglutinin-horseradish peroxidase injected into the nodose ganglion and their density and morphology were examined. Between postnatal day 1 and weaning, body weight of SL mice was greater than for NL mice. By young adulthood it was similar in both groups, whereas SL fat pad weight was greater in males, suggesting postnatal overnutrition produced a predisposition to obesity. SL mice exhibited increased food intake, decreased satiety ratio, and increased first meal rate (following mild food deprivation) compared to NL mice, suggesting postnatal overnutrition disrupted satiety. The density and structure of intestinal IGLEs appeared similar in SL and NL mice. Thus, although a vagal role cannot be excluded, our meal parameter and anatomical findings provided no evidence for significant postnatal overnutrition effects on vagal gastrointestinal afferents.
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Affiliation(s)
- Jessica E Biddinger
- Behavioral Neurogenetics Laboratory, Department of Psychological Sciences, Purdue University, West Lafayette, IN 47907, USA
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