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Fan J, Yin M. Offspring of women with hyperemesis gravidarum are more likely to have cardiovascular abnormalities. BMC Pregnancy Childbirth 2024; 24:119. [PMID: 38331740 PMCID: PMC10854153 DOI: 10.1186/s12884-024-06293-6] [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: 11/20/2023] [Accepted: 01/26/2024] [Indexed: 02/10/2024] Open
Abstract
BACKGROUND Hyperemesis gravidarum (HG) is a severe form of pregnancy-related nausea and vomiting affecting 0.3-2.3% of pregnancies, which can lead to fluid, electrolyte, and acid-base imbalances, nutritional deficiencies, and weight loss, and is usually severe enough to require hospitalization. Abnormally elevated urinary ketones are commonly seen in patients with HG, and ketone bodies are free to pass through the placenta, and maternal hyperketonemia, with or without acidosis, is associated with an increased rate of stillbirth, an increased incidence of congenital anomalies, and impaired neurophysiologic development of the infant. This study investigates the obstetric outcomes of patients with HG and whether HG increases the incidence of cardiovascular disease in the offspring. METHODS This study included 1020 pregnant women who were hospitalized in our hospital for HG and ultimately delivered in our hospital as well as pregnant women without HG in early gestation and delivered in our hospital from January 2019-January 2020, and we collected and followed up the clinical information of the pregnant women and their offspring. RESULTS Pregnant women with HG were more likely to have severe urinary ketones, the rate of early miscarriage and mid-term miscarriage was significantly higher in women with HG compared to pregnant women without HG. Fetal and neonatal head and abdominal circumferences were smaller in HG group than in control group. Neonatal birth weight and length were also lower in the HG group and cardiovascular anomalies were more likely to occur in the offspring of women with HG when all births were followed up for 3 years. CONCLUSIONS HG may cause poor obstetric outcomes and was associated with the development of cardiovascular disease in the offspring of women with HG.
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Affiliation(s)
- Jiao Fan
- Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Minghong Yin
- Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China.
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Schumacher R, Rossetti MF, Canesini G, Gaydou L, Garcia AP, Lazzarino GP, Fernandez PR, Stoker C, Carrió MJ, Andreoli MF, Ramos JG. Neonatal overfeeding alters the functioning of the mesolimbic dopaminergic circuitry involving changes in DNA methylation and effects on feeding behavior. J Nutr Biochem 2023; 122:109451. [PMID: 37748623 DOI: 10.1016/j.jnutbio.2023.109451] [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: 02/06/2023] [Revised: 08/23/2023] [Accepted: 09/21/2023] [Indexed: 09/27/2023]
Abstract
Mesolimbic dopaminergic circuit is essential for food reward and motivational behaviors and can contribute to weight gain and obesity. Litter reduction is a classical model for studying the effects of neonatal overfeeding and overweight. Litters of Wistar rats were reduced to 4 pups/dam for small litter (SL) and 10 pups/dam for normal litter at postnatal day (PND) 4. Immediately after performing the feeding behavior tests, the animals were sacrificed in PND21 and PND90. The ventral tegmental area (VTA), Nucleus Accumbens Core (NAcC) and Shell (NAcSh) were isolated from frozen brain sections using the Palkovits micropunch technique. RNA and DNA were extracted from these areas, gene expression was measured by RT-qPCR and DNA methylation levels were measured by MSRM-qPCR technique. SL-PND21 animals presented increased expression levels of Tyrosine Hydroxylase and Dopamine Receptor D2 in VTA, decreased expression levels of dopamine active transporter (DAT) in VTA, and higher expression levels of DAT in NAcC. On the other hand, SL-PND90 animals showed decreased expression levels of Dopamine Receptor D1 and higher expression of DAT in NAcSh. These animals also evidenced impaired sensory-specific satiety. In addition, altered promoter methylation was observed at weaning, and remained in adulthood. This work demonstrates that neonatal overfeeding induces disruptions in the mesolimbic dopaminergic circuitry and causes alterations in feeding behavior from weaning to adulthood, suggesting that the neonatal period is critical for the normal development of dopaminergic circuit that impact on feeding behavior.
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Affiliation(s)
- Rocio Schumacher
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina
| | - Maria Florencia Rossetti
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina
| | - Guillermina Canesini
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina
| | - Luisa Gaydou
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina; Departamento de Bioquímica Clínica y Cuantitativa, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Ana Paula Garcia
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina
| | - Gisela Paola Lazzarino
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina
| | - Pamela Rocio Fernandez
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina
| | - Cora Stoker
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina; Departamento de Bioquímica Clínica y Cuantitativa, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Maria Josefina Carrió
- Departamento de Matemática y Laboratorio de Investigaciones y Servicios en Bioestadística (LISEB), FBCB-UNL, Santa Fe, Argentina
| | - Maria Florencia Andreoli
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina; Departamento de Bioquímica Clínica y Cuantitativa, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Jorge Guillermo Ramos
- Instituto de Salud y Ambiente del Litoral (ISAL), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa-CONICET, Santa Fe, Argentina; Departamento de Bioquímica Clínica y Cuantitativa, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina.
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3
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Harmancıoğlu B, Kabaran S. Maternal high fat diets: impacts on offspring obesity and epigenetic hypothalamic programming. Front Genet 2023; 14:1158089. [PMID: 37252665 PMCID: PMC10211392 DOI: 10.3389/fgene.2023.1158089] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 05/04/2023] [Indexed: 05/31/2023] Open
Abstract
Maternal high-fat diet (HFD) during pregnancy is associated with rapid weight gain and fetal fat mass increase at an early stage. Also, HFD during pregnancy can cause the activation of proinflammatory cytokines. Maternal insulin resistance and inflammation lead to increased adipose tissue lipolysis, and also increased free fatty acid (FFA) intake during pregnancy (˃35% of energy from fat) cause a significant increase in FFA levels in the fetus. However, both maternal insulin resistance and HFD have detrimental effects on adiposity in early life. As a result of these metabolic alterations, excess fetal lipid exposure may affect fetal growth and development. On the other hand, increase in blood lipids and inflammation can adversely affect the development of the liver, adipose tissue, brain, skeletal muscle, and pancreas in the fetus, increasing the risk for metabolic disorders. In addition, maternal HFD is associated with changes in the hypothalamic regulation of body weight and energy homeostasis by altering the expression of the leptin receptor, POMC, and neuropeptide Y in the offspring, as well as altering methylation and gene expression of dopamine and opioid-related genes which cause changes in eating behavior. All these maternal metabolic and epigenetic changes may contribute to the childhood obesity epidemic through fetal metabolic programming. Dietary interventions, such as limiting dietary fat intake <35% with appropriate fatty acid intake during the gestation period are the most effective type of intervention to improve the maternal metabolic environment during pregnancy. Appropriate nutritional intake during pregnancy should be the principal goal in reducing the risks of obesity and metabolic disorders.
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4
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Donato J. Programming of metabolism by adipokines during development. Nat Rev Endocrinol 2023:10.1038/s41574-023-00828-1. [PMID: 37055548 DOI: 10.1038/s41574-023-00828-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/16/2023] [Indexed: 04/15/2023]
Abstract
The intrauterine and early postnatal periods represent key developmental stages in which an organism is highly susceptible to being permanently influenced by maternal factors and nutritional status. Strong evidence indicates that either undernutrition or overnutrition during development can predispose individuals to disease later in life, especially type 2 diabetes mellitus and obesity, a concept known as metabolic programming. Adipose tissue produces important signalling molecules that control energy and glucose homeostasis, including leptin and adiponectin. In addition to their well-characterized metabolic effects in adults, adipokines have been associated with metabolic programming by affecting different aspects of development. Therefore, alterations in the secretion or signalling of adipokines, caused by nutritional insults in early life, might lead to metabolic diseases in adulthood. This Review summarizes and discusses the potential role of several adipokines in inducing metabolic programming through their effects during development. The identification of the endocrine factors that act in early life to permanently influence metabolism represents a key step in understanding the mechanisms behind metabolic programming. Thus, future strategies aiming to prevent and treat these metabolic diseases can be designed, taking into consideration the relationship between adipokines and the developmental origins of health and disease.
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Affiliation(s)
- Jose Donato
- Department of Physiology and Biophysics, Instituto de Ciencias Biomedicas, Universidade de Sao Paulo, Sao Paulo, Brazil.
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5
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de Oliveira Nascimento Freitas RGB, Vasques ACJ, Ribeiro FB, Solar I, Hanada AS, Barbosa MG, Valente AMM, de Almeida Pititto B, Eshriqui I, da Cunha Lopes TL, Geloneze B, Ferreira SRG. Parental body mass index and maternal gestational weight gain associations with offspring body composition in young women from the Nutritionists' Health Study. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2023; 67:101-110. [PMID: 36155122 PMCID: PMC9983792 DOI: 10.20945/2359-3997000000516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Objective Intrauterine environment can induce fetal metabolic programming that predisposes to adiposity-related chronic diseases in its lifespan. We examined the associations of parental nutritional status and gestational weight gain with offspring body composition in early adulthood. Methods This is cross-sectional analysis of female participants of the NutriHS who were submitted to questionnaires, clinical examinations and body composition assessed by DXA. Association of preconception parental BMI and maternal gestational weight gain (exposures) with body composition measurements (outcomes) were analyzed using multiple linear models adjusted for Directed Acyclic Graphs-based covariables (maternal and paternal educational level, maternal age, and tobacco, alcohol and/or drugs use). The sample included 124 women (median 28 (24-31) years) with a mean BMI of 25.4 ± 4.7 kg/m2. Results No association between previous paternal BMI and offspring's body composition was detected. In the fully adjusted linear regression model, maternal BMI was associated with offspring's total lean mass (β = 0.66, p = 0.001), appendicular skeletal muscle mass index (ASMI) (β = 0.11, p = 0.003) and fat mass index (FMI) (β = 0.03, p = 0.039). Gestational weight gain was associated with increased offspring's BMI (OR 1.12 [95% CI 1.02-1.20], p = 0.01). The linear regression model adjusted for maternal age and maternal and paternal education levels showed associations of gestational weight gain with offspring's ASMI (β = 0.42, p = 0.046), FMI (β = 0.22, p = 0.005) and android-to-gynoid fat ratio (β = 0.09, p = 0.035). Conclusion Our findings suggest that preconception maternal BMI could influence lean mass and general adiposity of young adult female offspring and that gestational weight gain could be useful for predicting centrally distributed adiposity.
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Affiliation(s)
- Renata Germano Borges de Oliveira Nascimento Freitas
- Departamento de Epidemiologia, Escola de Saúde Pública, Universidade de São Paulo, São Paulo, SP, Brasil.,Laboratório de Investigação em Metabolismo e Diabetes, Gastrocentro, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - Ana Carolina Junqueira Vasques
- Laboratório de Investigação em Metabolismo e Diabetes, Gastrocentro, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil.,Escola de Ciências Aplicadas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - Francieli Barreiro Ribeiro
- Laboratório de Investigação em Metabolismo e Diabetes, Gastrocentro, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil.,Escola de Ciências Aplicadas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - Isabela Solar
- Laboratório de Investigação em Metabolismo e Diabetes, Gastrocentro, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil.,Escola de Ciências Aplicadas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - Alfredo Shigueo Hanada
- Laboratório de Investigação em Metabolismo e Diabetes, Gastrocentro, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil.,Escola de Ciências Aplicadas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - Marina Gomes Barbosa
- Escola de Ciências Aplicadas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | | | | | - Ilana Eshriqui
- Departamento de Epidemiologia, Escola de Saúde Pública, Universidade de São Paulo, São Paulo, SP, Brasil.,Hospital Israelita Albert Einstein, São Paulo, SP, Brasil
| | | | - Bruno Geloneze
- Laboratório de Investigação em Metabolismo e Diabetes, Gastrocentro, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil.,Centro de Pesquisa de Obesidade e Comorbidades, Universidade Estadual de Campinas, Campinas, SP, Brasil
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Noye Tuplin EW, Alukic E, Lowry DE, Chleilat F, Wang W, Cho NA, Sampsell K, Sales KM, Mayengbam S, McCoy KD, Reimer RA. Dietary fiber combinations to mitigate the metabolic, microbial, and cognitive imbalances resulting from diet-induced obesity in rats. FASEB J 2022; 36:e22269. [PMID: 35344215 DOI: 10.1096/fj.202101750r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/23/2022] [Accepted: 03/09/2022] [Indexed: 12/13/2022]
Abstract
Dietary fiber promotes a healthy gut microbiome and shows promise in attenuating the unfavorable microbial changes resulting from a high-fat/sucrose (HFS) diet. High-fiber diets consisting of oligofructose alone (HFS/O) or in combination with β-glucan (HFS/OB), resistant starch (HFS/OR), or β-glucan and resistant starch (HFS/OBR) were fed to diet-induced obese rats for 8 weeks to determine if these fibers could attenuate the obese phenotype. Only the HFS/O group displayed a decrease in body weight and body fat, but all fiber interventions improved insulin sensitivity and cognitive function. The HFS/O diet was the least effective at improving cognitive function and only the HFS/OB group showed improvements in glucose tolerance, thus highlighting the differential effects of fiber types. Hippocampal cytokines (IL-6, IL-10) were more pronounced in the HFS/OB group which coincided with the most time spend in the open arms of the elevated plus maze. All fiber groups showed an increase in beneficial Bifidobacterium and Lactobacillus abundance while the HFS group showed higher abundance of Clostridium. Fecal microbiota transplant from fiber-treated rats into germ-free mice did not alter body composition in the mice but did result in a higher abundance of Bacteroides in the HFS/O and HFS/OB groups compared to HFS. The HFS/OB recipient mice also had higher insulin sensitivity compared to the other groups. This study highlights the influence of dietary fiber type on metabolic and cognitive outcomes suggesting that the type of supplementation (single or combined fibers) could be tailored to specific targeted outcomes.
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Affiliation(s)
| | - Erna Alukic
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Dana E Lowry
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Faye Chleilat
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Weilan Wang
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Nicole A Cho
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Kara Sampsell
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Kate M Sales
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | - Shyamchand Mayengbam
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Kathy D McCoy
- Department of Physiology and Pharmacology, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Raylene A Reimer
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.,Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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7
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Denisova EI, Savinkova MM, Makarova EN. Influence of leptin administration to pregnant female mice on obesity development, taste preferences, and gene expression in the liver and muscles of their male and female offspring. Vavilovskii Zhurnal Genet Selektsii 2021; 25:669-676. [PMID: 34782887 PMCID: PMC8558916 DOI: 10.18699/vj21.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/24/2021] [Accepted: 06/17/2021] [Indexed: 11/19/2022] Open
Abstract
. The consumption of food rich in sugar and fat provokes obesity. Prenatal conditions have an impact on taste preferences and metabolism in the adult offspring, and this impact may manifest differently in different sexes. An increase in blood leptin level in pregnant females reduces the risk of obesity and insulin resistance in the offspring, although the mechanisms mediating this effect are unknown. Neither is it known whether maternal leptin affects taste preferences. In this study, we investigated the effect of leptin administration to pregnant mice on the development of diet-induced obesity, food choice, and gene expression in the liver and muscles of the offspring with regard to sex. Leptin was administered to female mice on days 11, 12, and 13 of pregnancy. In male and female offspring, growth rate and intake of standard chow after weaning, obesity development, gene expression in the liver and muscles, and food choice when kept on a high-calorie diet (standard chow, lard, sweet cookies) were recorded. Leptin administration to pregnant females reduced body weight in the female offspring fed on the standard diet. When the offspring were given a high-calorie diet, leptin administration inhibited obesity development and reduced the consumption of cookies only in males. It also increased the consumption of standard chow and the mRNA levels of genes for the insulin receptor and glucose transporter type 4 in the muscles of both male and female offspring. The results demonstrate that an increase in blood leptin levels in pregnant females has a sex-specif ic effect on the metabolism of the offspring increasing resistance to obesity only in male offspring. The mechanism underlying this effect includes a shift in food preference in favor of a balanced diet and maintenance of insulin sensitivity in muscle tissues.
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Affiliation(s)
- E I Denisova
- Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | | | - E N Makarova
- Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
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Szabo Z, Koczka V, Marosvolgyi T, Szabo E, Frank E, Polyak E, Fekete K, Erdelyi A, Verzar Z, Figler M. Possible Biochemical Processes Underlying the Positive Health Effects of Plant-Based Diets-A Narrative Review. Nutrients 2021; 13:2593. [PMID: 34444753 PMCID: PMC8398942 DOI: 10.3390/nu13082593] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/11/2022] Open
Abstract
Plant-based diets are becoming more popular for many reasons, and epidemiological as well as clinical data also suggest that a well-balanced vegan diet can be adopted for the prevention, and in some cases, in the treatment of many diseases. In this narrative review, we provide an overview of the relationships between these diets and various conditions and their potential biochemical background. As whole plant foods are very rich in food-derived antioxidants and other phytochemicals, they have many positive physiological effects on different aspects of health. In the background of the beneficial health effects, several biochemical processes could stand, including the reduced formation of trimethylamine oxide (TMAO) or decreased serum insulin-like growth factor 1 (IGF-1) levels and altered signaling pathways such as mechanistic target of rapamycin (mTOR). In addition, the composition of plant-based diets may play a role in preventing lipotoxicity, avoiding N-glycolylneuraminic acid (Neu5Gc), and reducing foodborne endotoxin intake. In this article, we attempt to draw attention to the growing knowledge about these diets and provide starting points for further research.
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Affiliation(s)
- Zoltan Szabo
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
| | - Viktor Koczka
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pecs, 7624 Pecs, Hungary; (V.K.); (E.S.)
- Doctoral School of Health Sciences, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary
| | - Tamas Marosvolgyi
- Institute of Bioanalysis, Medical School, University of Pecs, 7624 Pecs, Hungary;
- Szentagothai Research Center, University of Pecs, 7624 Pecs, Hungary
| | - Eva Szabo
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pecs, 7624 Pecs, Hungary; (V.K.); (E.S.)
| | - Eszter Frank
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
| | - Eva Polyak
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
| | - Kata Fekete
- Institute for Translational Medicine, Medical School, University of Pecs, 7624 Pecs, Hungary;
| | - Attila Erdelyi
- Institute of Health Insurance, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary;
| | - Zsofia Verzar
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
| | - Maria Figler
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
- 2nd Department of Internal Medicine and Nephrology Centre, Clinical Centre, University of Pecs, 7624 Pecs, Hungary
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Noye Tuplin EW, Chleilat F, Alukic E, Reimer RA. The Effects of Human Milk Oligosaccharide Supplementation During Critical Periods of Development on the Mesolimbic Dopamine System. Neuroscience 2021; 459:166-178. [PMID: 33588004 DOI: 10.1016/j.neuroscience.2021.02.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 02/04/2021] [Accepted: 02/05/2021] [Indexed: 12/15/2022]
Abstract
Human milk oligosaccharides (HMO)s are a key component in human milk and represent an important dietary modulator of infant gut microbiota composition and associated gut-brain axis development and homeostasis. The brain reward system, specifically the mesolimbic dopamine (DA) projections from the ventral tegmental area (VTA) to nucleus accumbens (NAc) is involved in the motivation and preference for food. The objective of the present study was to determine if HMO fortified diets given during the critical period of reward system development (p21) could affect the structure of the reward system. At weaning (p21), Sprague-Dawley rats were randomized to one of four fortified diet groups: Control, 3'sialyllactose (3'FL), 2'-fucosyllactose (2'FL), or a combination of 3'SL and 2'FL (3'SL + 2'FL). Messenger RNA (mRNA) expression was quantified for DA and appetite associated markers in the VTA and NAc and western blots measured the immediate early gene FosB and its isoform ΔFosB. Females fed the 3'SL + 2'FL fortified diet displayed a decrease in DAT expression in the VTA and an increase in leptin expression in the NAc. Females displayed an overall lower expression of NAc D2, VTA ghrelinR, and VTA leptin. In males, VTA DAT and FosB were negatively correlated with body weight and systemic leptin. Sex differences in the expression of DA markers underscore the need to investigate this phenomenon and understand the functional significance in preventing or treating obesity. This study highlights sex differences in response to HMO supplementation and the need for further investigations into the functional significance of nutritional interventions during DA system development.
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Affiliation(s)
- Erin W Noye Tuplin
- Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Faye Chleilat
- Faculty of Kinesiology, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Erna Alukic
- 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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10
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Maternal exercise during gestation and lactation decreases high-fat diet preference by altering central reward system gene expression in adult female offspring from high-fat fed dams. Behav Brain Res 2020; 390:112660. [PMID: 32387350 DOI: 10.1016/j.bbr.2020.112660] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/15/2020] [Accepted: 04/17/2020] [Indexed: 12/21/2022]
Abstract
Exposure to maternal high-fat (HF) diet during gestation and lactation alters adult offspring's feeding behavior and diet preference. However, the impact of maternal exercise on offspring's diet preference and reward system development is less studied. In this study, we investigate the effect of perinatal maternal exercise on the development of diet preference, dopamine- and opioid-related gene expression in the central reward system in female offspring from HF-fed Sprague-Dawley rat dams. We found maternal HF diet did not alter adult offspring HF preference, but influenced offspring's dopamine and opioid system both at weaning and in adulthood, and these offspring retained higher body weight in adulthood. However, offspring from dams exposed to both HF diet and exercise during gestation and lactation had normalized body weight, decreased fat mass and lower HF-diet preference but increased energy intake in adulthood. The dopamine- and opioid-related gene expression in central reward system and POMC expression in hypothalamus was elevated in these adult offspring. We conclude that maternal exercise during gestation and lactation can potentially overcome the negative effects of perinatal exposure to HF diet in female offspring by altering their diet preference, central reward system signaling and hypothalamus neuropeptide expression.
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Epigenetic Dysregulation of Dopaminergic System by Maternal Cafeteria Diet During Early Postnatal Development. Neuroscience 2020; 424:12-23. [DOI: 10.1016/j.neuroscience.2019.09.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 08/12/2019] [Accepted: 09/11/2019] [Indexed: 12/22/2022]
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Novelle MG, Diéguez C. Updating gender differences in the control of homeostatic and hedonic food intake: Implications for binge eating disorder. Mol Cell Endocrinol 2019; 497:110508. [PMID: 31319096 DOI: 10.1016/j.mce.2019.110508] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 07/11/2019] [Accepted: 07/13/2019] [Indexed: 12/30/2022]
Abstract
In an obesity pandemic context, eating disorders (ED) have arisen as serious illnesses associated with severe disturbances and has a clear gender dependent bias. In this manuscript, we provide an overview of the oestrogen role in the homeostatic and hedonic control of food intake. We draw attention to the role of oestrogens in the various reward processes and their possible implication in the development of ED, a condition much more common in women. In here, we have summarized the most relevant studies conducted in animal models over the last few years. In particular, we want to emphasize on the importance of continuing thorough investigations in female animal models. We believe that understanding the molecular mechanisms that regulate gender differences in food intake may provide new potential targets for ED treatment.
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Affiliation(s)
- Marta G Novelle
- Department of Physiology, Centre for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela-Instituto de Investigación Sanitaria (IDIS), CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Santiago de Compostela, Spain.
| | - Carlos Diéguez
- Department of Physiology, Centre for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela-Instituto de Investigación Sanitaria (IDIS), CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Santiago de Compostela, Spain.
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Breastfeeding duration is associated with offspring’s adherence to prudent dietary pattern in adulthood: results from the Nutritionist’s Health Study. J Dev Orig Health Dis 2019; 11:136-145. [DOI: 10.1017/s204017441900031x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractLittle is known about the long-term effect of breastfeeding on dietary habits. We examined the association between breastfeeding duration and adherence to current dietary patterns of young women. This was a cross-sectional analysis of 587 healthy women aged ≤45 years, undergraduates or nutrition graduates. Maternal characteristics and breastfeeding duration [<6; 6–<12; ≥12 months (reference)] were recalled. Diet was assessed using a food frequency questionnaire and patterns were identified using factor analysis by principal component. Adherence to patterns was categorized in tertiles; the first (T1 = reference) was compared to T2 + T3 (moderate-to-high adherence). Logistic regression was performed considering the minimal sufficient adjustment recommended by the directed acyclic graph. Median age was 22 (interquartile range (IQR) 20; 27) years and body mass index (BMI) 22.2 (IQR 20.4; 25.0) kg/m2. The four dietary patterns identified (Processed, Prudent, Brazilian and Lacto-vegetarian) explained 27% of diet variance. Women breastfed for <6 months showed lower chance of moderate-to-high adherence to the Prudent pattern (odds ratio (OR) = 0.53, p = 0.04). Breastfeeding was not associated with the other patterns. Maternal pre-pregnancy BMI was directly associated with moderate-to-high adherence to the Processed pattern (OR = 2.01, p = 0.03) and inversely to the Prudent pattern (OR = 0.52, p = 0.02). Higher adherence to the Brazilian pattern was associated with proxies of low socioeconomic status and the Lacto-vegetarian pattern with the opposite. Confirmation in prospective studies of the association found in this study between breastfeeding with the Prudent pattern in adult offspring could suggest that early feeding practices influence long-term dietary habits, which could then affect the risk of nutrition-related diseases.
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Declerck K, Remy S, Wohlfahrt-Veje C, Main KM, Van Camp G, Schoeters G, Vanden Berghe W, Andersen HR. Interaction between prenatal pesticide exposure and a common polymorphism in the PON1 gene on DNA methylation in genes associated with cardio-metabolic disease risk-an exploratory study. Clin Epigenetics 2017; 9:35. [PMID: 28396702 PMCID: PMC5382380 DOI: 10.1186/s13148-017-0336-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 03/30/2017] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Prenatal environmental conditions may influence disease risk in later life. We previously found a gene-environment interaction between the paraoxonase 1 (PON1) Q192R genotype and prenatal pesticide exposure leading to an adverse cardio-metabolic risk profile at school age. However, the molecular mechanisms involved have not yet been resolved. It was hypothesized that epigenetics might be involved. The aim of the present study was therefore to investigate whether DNA methylation patterns in blood cells were related to prenatal pesticide exposure level, PON1 Q192R genotype, and associated metabolic effects observed in the children. METHODS Whole blood DNA methylation patterns in 48 children (6-11 years of age), whose mothers were occupationally unexposed or exposed to pesticides early in pregnancy, were determined by Illumina 450 K methylation arrays. RESULTS A specific methylation profile was observed in prenatally pesticide exposed children carrying the PON1 192R-allele. Differentially methylated genes were enriched in several neuroendocrine signaling pathways including dopamine-DARPP32 feedback (appetite, reward pathways), corticotrophin releasing hormone signaling, nNOS, neuregulin signaling, mTOR signaling, and type II diabetes mellitus signaling. Furthermore, we were able to identify possible candidate genes which mediated the associations between pesticide exposure and increased leptin level, body fat percentage, and difference in BMI Z score between birth and school age. CONCLUSIONS DNA methylation may be an underlying mechanism explaining an adverse cardio-metabolic health profile in children carrying the PON1 192R-allele and prenatally exposed to pesticides.
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Affiliation(s)
- Ken Declerck
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, Antwerp, Belgium
| | - Sylvie Remy
- Department of Epidemiology and Social Medicine, Antwerp University, Universiteitsplein 1, Antwerp, Belgium.,Flemish Institute for Technological Research (VITO), Unit Environmental Risk and Health, Boeretang 200, Mol, Belgium
| | - Christine Wohlfahrt-Veje
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - Katharina M Main
- Department of Growth and Reproduction, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - Guy Van Camp
- Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Greet Schoeters
- Flemish Institute for Technological Research (VITO), Unit Environmental Risk and Health, Boeretang 200, Mol, Belgium.,Department of Biomedical Sciences, Antwerp University, Universiteitsplein 1, Antwerp, Belgium.,Environmental Medicine, Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - Wim Vanden Berghe
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, Antwerp, Belgium
| | - Helle R Andersen
- Environmental Medicine, Institute of Public Health, University of Southern Denmark, Odense, Denmark
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Carvalho JC, Lisboa PC, de Oliveira E, Peixoto-Silva N, Nobre JL, Fraga MC, Manhães AC, Moura EG. Effects of postnatal bromocriptine injection on thyroid function and prolactinemia of rats at adulthood. Neuropeptides 2016; 59:71-81. [PMID: 27261099 DOI: 10.1016/j.npep.2016.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 04/28/2016] [Accepted: 05/23/2016] [Indexed: 12/24/2022]
Abstract
Previously, we demonstrated that maternal prolactin inhibition at the end of lactation, using bromocriptine (BRO), leads to an increase in leptin transfer via milk and induces the adult progeny to present hypothyroidism, leptin resistance and metabolic syndrome (obesity, hyperglycemia, hypertriglyceridemia, lower HDL). To test if these alterations are due to direct BRO action on the pups, in the present study we evaluated the long-term effects of direct injection of BRO (0.1μg/once daily) in male Wistar rats from postnatal (PN) day 1 to 10 (early treatment) or from PN11 to 20 (late treatment) on: food intake, body mass, cardiovascular parameters, hormone profile, hypothalamic leptin signaling, glucose homeostasis and thyroid hormone-dependent proteins. The respective controls were injected with methanol-saline. Offspring were killed at adulthood (PN180). Adult PN1-10 BRO-treated animals had lower food intake, hypoprolactinemia, lower leptin action (lower OBR-b, STAT-3 and SOCS-3 mRNA levels in the arcuate nucleus), lower TRH-TSH-thyroid axis as well as lower thyroid hormone markers. On the other hand, adult animals that were BRO-treated during the PN11-20 period showed hyperphagia, higher blood pressure, higher prolactinemia and OBR-b, higher TRH and plasma T3, hypercorticosteronemia as well as higher Dio2 and UCP1 mRNA expression in the brown adipose tissue. Glucose homeostasis was not changed treatment in either period. Our data show that early and late dopamine overexposure during lactation induces diverse metabolic disturbances later in life, increasing the risk of thyroid dysfunction and, consequently, changes in prolactinemia.
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Affiliation(s)
- Janaine C Carvalho
- Laboratory of Endocrine Physiology, Roberto Alcantara Gomes Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, RJ 20551-031, Brazil
| | - Patricia C Lisboa
- Laboratory of Endocrine Physiology, Roberto Alcantara Gomes Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, RJ 20551-031, Brazil.
| | - Elaine de Oliveira
- Laboratory of Endocrine Physiology, Roberto Alcantara Gomes Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, RJ 20551-031, Brazil
| | - Nayara Peixoto-Silva
- Laboratory of Endocrine Physiology, Roberto Alcantara Gomes Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, RJ 20551-031, Brazil
| | - Jessica L Nobre
- Laboratory of Endocrine Physiology, Roberto Alcantara Gomes Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, RJ 20551-031, Brazil
| | - Mabel C Fraga
- Laboratory of Endocrine Physiology, Roberto Alcantara Gomes Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, RJ 20551-031, Brazil
| | - Alex C Manhães
- Laboratory of Neurophysiology, Roberto Alcantara Gomes Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, RJ 20551-031, Brazil
| | - Egberto G Moura
- Laboratory of Endocrine Physiology, Roberto Alcantara Gomes Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, RJ 20551-031, Brazil
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Conceição EPS, Carvalho JC, Manhães AC, Guarda DS, Figueiredo MS, Quitete FT, Oliveira E, Moura EG, Lisboa PC. Effect of Early Overfeeding on Palatable Food Preference and Brain Dopaminergic Reward System at Adulthood: Role of Calcium Supplementation. J Neuroendocrinol 2016; 28. [PMID: 26929129 DOI: 10.1111/jne.12380] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 02/24/2016] [Accepted: 02/24/2016] [Indexed: 01/21/2023]
Abstract
Rats raised in small litters (SL) are obese and hyperphagic. In the present study, we evaluated whether obesity is associated with changes in the mesocorticolimbic dopaminergic reward system in these animals at adulthood. We also assessed the anti-obesity effects of dietary calcium supplementation. To induce early overfeeding, litters were adjusted to three pups on postnatal day (PN)3 (SL group). Control litters were kept with 10 pups each until weaning (NL group). On PN120, SL animals were subdivided into two groups: SL (standard diet) and SL-Ca [SL with calcium supplementation (10 g calcium carbonate/kg rat chow) for 60 days]. On PN175, animals were subjected to a food challenge: animals could choose between a high-fat (HFD) or a high-sugar diet (HSD). Food intake was recorded after 30 min and 12 h. Euthanasia occurred on PN180. SL rats had higher food intake, body mass and central adiposity. Sixty days of dietary calcium supplementation (SL-Ca) prevented these changes. Only SL animals preferred the HFD at 12 h. Both SL groups had lower tyrosine hydroxylase content in the ventral tegmental area, lower dopaminergic transporter content in the nucleus accumbens, and higher type 2 dopamine receptor (D2R) content in the hypothalamic arcuate nucleus (ARC). They also had higher neuropeptide Y (NPY) and lower pro-opiomelanocortin contents in the ARC. Calcium treatment normalised only D2R and NPY contents. Precocious obesity induces long-term effects in the brain dopaminergic system, which can be associated with an increased preference for fat at adulthood. Calcium treatment prevents this last alteration, partially through its actions on ARC D2R and NPY proteins.
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Affiliation(s)
- E P S Conceição
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - J C Carvalho
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - A C Manhães
- Laboratory of Neurophysiology, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - D S Guarda
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - M S Figueiredo
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - F T Quitete
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - E Oliveira
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - E G Moura
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - P C Lisboa
- Laboratory of Endocrine Physiology, Department of Physiological Sciences, Biology Institute, State University of Rio de Janeiro, Rio de Janeiro, Brazil
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Gugusheff JR, Ong ZY, Muhlhausler BS. The early origins of food preferences: targeting the critical windows of development. FASEB J 2014; 29:365-73. [PMID: 25466884 DOI: 10.1096/fj.14-255976] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The nutritional environment to which an individual is exposed during the perinatal period plays a crucial role in determining his or her future metabolic health outcomes. Studies in rodent models have demonstrated that excess maternal intake of high-fat and/or high-sugar "junk foods" during pregnancy and lactation can alter the development of the central reward pathway, particularly the opioid and dopamine systems, and program an increased preference for junk foods in the offspring. More recently, there have been attempts to define the critical windows of development during which the opioid and dopamine systems within the reward pathway are most susceptible to alteration and to determine whether it is possible to reverse these effects through nutritional interventions applied later in development. This review discusses the progress made to date in these areas, highlights the apparent importance of sex in determining these effects, and considers the potential implications of the findings from rodent models in the human context.
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Affiliation(s)
- Jessica Rose Gugusheff
- *FOODplus Research Centre, School of Agriculture Food and Wine, The University of Adelaide, Adelaide, South Australia, Australia; Sansom Institute for Health Research, School of Pharmacy and Medical Science, University of South Australia, Adelaide, South Australia, Australia; and Department of Psychology, The University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Zhi Yi Ong
- *FOODplus Research Centre, School of Agriculture Food and Wine, The University of Adelaide, Adelaide, South Australia, Australia; Sansom Institute for Health Research, School of Pharmacy and Medical Science, University of South Australia, Adelaide, South Australia, Australia; and Department of Psychology, The University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Beverly Sara Muhlhausler
- *FOODplus Research Centre, School of Agriculture Food and Wine, The University of Adelaide, Adelaide, South Australia, Australia; Sansom Institute for Health Research, School of Pharmacy and Medical Science, University of South Australia, Adelaide, South Australia, Australia; and Department of Psychology, The University of Pennsylvania, Philadelphia, Pennsylvania, USA
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