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Mansano NDS, Vieira HR, Araujo-Lopes R, Szawka RE, Donato J, Frazao R. Fasting Modulates GABAergic Synaptic Transmission to Arcuate Kisspeptin Neurons in Female Mice. Endocrinology 2023; 164:bqad150. [PMID: 37793082 DOI: 10.1210/endocr/bqad150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/28/2023] [Accepted: 10/02/2023] [Indexed: 10/06/2023]
Abstract
It is well-established that the hypothalamic-pituitary-gonadal (HPG) axis is suppressed due to negative energy balance. However, less information is available on whether kisspeptin neuronal activity contributes to fasting-induced responses. In the present study, female and male mice were fasted for 24 hours or provided food ad libitum (fed group) to determine whether acute fasting is sufficient to modulate kisspeptin neuronal activity. In female mice, fasting attenuated luteinizing hormone (LH) and prolactin (PRL) serum levels and increased follicle-stimulating hormone levels compared with the fed group. In contrast, fasting did not affect gonadotropin or PRL secretion in male mice. By measuring genes related to LH pulse generation in micropunches obtained from the arcuate nucleus of the hypothalamus (ARH), we observed that fasting reduced Kiss1 mRNA levels in female and male mice. In contrast, Pdyn expression was upregulated only in fasted female mice, whereas no changes in the Tac2 mRNA levels were observed in both sexes. Interestingly, the frequency and amplitude of the GABAergic postsynaptic currents recorded from ARH kisspeptin neurons (ARHKisspeptin) were reduced in 24-hour fasted female mice but not in males. Additionally, neuropeptide Y induced a hyperpolarization in the resting membrane potential of ARHKisspeptin neurons of fed female mice but not in males. Thus, the response of ARHKisspeptin neurons to fasting is sexually dependent with a female bias, associated with changes in gonadotropins and PRL secretion. Our findings suggest that GABAergic transmission to ARHKisspeptin neurons modulates the activity of the HPG axis during situations of negative energy balance.
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Affiliation(s)
- Naira da Silva Mansano
- Universidade de Sao Paulo, Instituto de Ciencias Biomedicas, Departamento de Anatomia, São Paulo, SP 05508-000, Brazil
| | - Henrique Rodrigues Vieira
- Universidade de Sao Paulo, Instituto de Ciencias Biomedicas, Departamento de Anatomia, São Paulo, SP 05508-000, Brazil
| | - Roberta Araujo-Lopes
- Universidade Federal de Minas Gerais, Departamento de Fisiologia e Biofisica, Instituto de Ciencias Biologicas, Belo Horizonte, MG 31270-901, Brazil
| | - Raphael Escorsim Szawka
- Universidade Federal de Minas Gerais, Departamento de Fisiologia e Biofisica, Instituto de Ciencias Biologicas, Belo Horizonte, MG 31270-901, Brazil
| | - Jose Donato
- Universidade de Sao Paulo, Instituto de Ciencias Biomedicas, Departamento de Fisiologia e Biofísica, São Paulo, SP 05508-000, Brazil
| | - Renata Frazao
- Universidade de Sao Paulo, Instituto de Ciencias Biomedicas, Departamento de Anatomia, São Paulo, SP 05508-000, Brazil
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Amaro A, Sousa D, Sá-Rocha M, Ferreira-Junior MD, Rosendo-Silva D, Saavedra LPJ, Barra C, Monteiro-Alfredo T, Gomes RM, de Freitas Mathias PC, Baptista FI, Matafome P. Postnatal Overfeeding in Rodents Induces a Neurodevelopment Delay and Anxious-like Behaviour Accompanied by Sex- and Brain-Region-Specific Synaptic and Metabolic Changes. Nutrients 2023; 15:3581. [PMID: 37630771 PMCID: PMC10459868 DOI: 10.3390/nu15163581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/04/2023] [Accepted: 08/13/2023] [Indexed: 08/27/2023] Open
Abstract
Nutritional disturbances during the early postnatal period can have long-lasting effects on neurodevelopment and may be related to behavioural changes at adulthood. While such neuronal connection disruption can contribute to social and behaviour alterations, the dysregulation of the neuroendocrine pathways involved in nutrient-sensing balance may also cause such impairments, although the underlying mechanisms are still unclear. We aimed to evaluate sex-specific neurodevelopmental and behavioural changes upon postnatal overfeeding and determine the potential underpinning mechanisms at the central nervous system level, with a focus on the interconnection between synaptic and neuroendocrine molecular alterations. At postnatal day 3 (PND3) litters were culled to three animals (small litter procedure). Neurodevelopmental tests were conducted at infancy, whereas behavioural tests to assess locomotion, anxiety, and memory were performed at adolescence, together with molecular analysis of the hippocampus, hypothalamus, and prefrontal cortex. At infancy, females presented impaired acquisition of an auditory response, eye opening, olfactory discrimination, and vestibular system development, suggesting that female offspring neurodevelopment/maturation was deeply affected. Male offspring presented a transitory delay in locomotor performance., while both offspring had lower upper limb strength. At adolescence, both sexes presented anxious-like behaviour without alterations in short-term memory retention. Both males and females presented lower NPY1R levels in a region-specific manner. Furthermore, both sexes presented synaptic changes in the hippocampus (lower GABAA in females and higher GABAA levels in males), while, in the prefrontal cortex, similar higher GABAA receptor levels were observed. At the hypothalamus, females presented synaptic changes, namely higher vGLUT1 and PSD95 levels. Thus, we demonstrate that postnatal overfeeding modulates offspring behaviour and dysregulates nutrient-sensing mechanisms such as NPY and GABA in a sex- and brain-region-specific manner.
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Affiliation(s)
- Andreia Amaro
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
| | - Diana Sousa
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
| | - Mariana Sá-Rocha
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
| | - Marcos Divino Ferreira-Junior
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Department of Physiological Sciences, Institute of Biological Sciences, University Federal of Goiás, Goiânia 74690-900, Brazil;
| | - Daniela Rosendo-Silva
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
| | - Lucas Paulo Jacinto Saavedra
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa 87020-900, Brazil; (L.P.J.S.); (P.C.d.F.M.)
| | - Cátia Barra
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
- Internal Medicine Department, University Hospital Center of Coimbra, 3004-561 Coimbra, Portugal
| | - Tamaeh Monteiro-Alfredo
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
| | - Rodrigo Mello Gomes
- Department of Physiological Sciences, Institute of Biological Sciences, University Federal of Goiás, Goiânia 74690-900, Brazil;
| | - Paulo Cezar de Freitas Mathias
- Laboratory of Secretion Cell Biology, Department of Biotechnology, Genetics and Cell Biology, State University of Maringa, Maringa 87020-900, Brazil; (L.P.J.S.); (P.C.d.F.M.)
| | - Filipa I. Baptista
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
| | - Paulo Matafome
- Coimbra Institute for Clinical and Biomedical Research (iCBR) and Institute of Physiology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (A.A.); (D.S.); (M.S.-R.); (M.D.F.-J.); (D.R.-S.); (C.B.); (F.I.B.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3000-061 Coimbra, Portugal
- Coimbra Health School (EsTeSC), Polytechnic University of Coimbra, 3046-854 Coimbra, Portugal
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Selma‐Royo M, González S, Gueimonde M, Chang M, Fürst A, Martínez‐Costa C, Bode L, Collado MC. Maternal Diet Is Associated with Human Milk Oligosaccharide Profile. Mol Nutr Food Res 2022; 66:e2200058. [PMID: 35612565 PMCID: PMC9541341 DOI: 10.1002/mnfr.202200058] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/03/2022] [Indexed: 01/18/2023]
Abstract
SCOPE Human milk oligosaccharides (HMOs) are complex glycans that are abundant in human milk. The potential impact of a maternal diet on individual HMOs and the association with secretor status is unknown. Thus, this study is aimed to examine the association between maternal diet and HMO profiles. METHODS AND RESULTS This is a cross-sectional study of the MAMI cohort with 101 human milk samples from healthy mothers. HMO profiling is assessed by quantitative HPLC. Maternal dietary information is recorded through an FFQ, and perinatal factors including the mode of delivery, antibiotic exposure, and breastfeeding practices, are collected. A more significant effect of diet on HMO profiles is observed in secretor mothers than in non-secretor mothers. (Poly)phenols and fibers, both soluble and insoluble, and several insoluble polysaccharides, pectin, and MUFA are associated with the secretor HMO profiles. CONCLUSIONS Maternal diet is associated with the composition and diversity of HMO in a secretor status-dependent manner. The relationship between maternal diet and bioactive compounds, including HMOs, which are present in human milk, needs further research due its potential impact on infant development and health outcomes.
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Affiliation(s)
- Marta Selma‐Royo
- Institute of Agrochemistry and Food Technology‐National Research Council (IATA‐CSIC)PaternaValencia46980Spain
| | - Sonia González
- Department of Functional BiologyUniversity of OviedoOviedoAsturias33006Spain
- DietMicrobiota, and Health Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA)OviedoAsturias33011Spain
| | - Miguel Gueimonde
- DietMicrobiota, and Health Group, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA)OviedoAsturias33011Spain
- Department of Microbiology and Biochemistry of Dairy ProductsInstituto de Productos Lácteos de Asturias‐National Research Council (IPLA‐CSIC)VillaviciosaAsturias33300Spain
| | - Melinda Chang
- Department of PediatricsUniversity of California San DiegoLa JollaCA92093USA
| | - Annalee Fürst
- Department of PediatricsUniversity of California San DiegoLa JollaCA92093USA
| | - Cecilia Martínez‐Costa
- Department of Pediatrics, School of MedicineUniversity of ValenciaValencia46010Spain
- Pediatric Gastroenterology and Nutrition SectionHospital Clínico Universitario ValenciaINCLIVA Research CenterValencia46010Spain
| | - Lars Bode
- Department of PediatricsUniversity of California San DiegoLa JollaCA92093USA
- Larsson‐Rosenquist Foundation Mother‐Milk‐Infant Center of Research ExcellenceUniversity of California San DiegoLa JollaCA92093USA
| | - Maria Carmen Collado
- Institute of Agrochemistry and Food Technology‐National Research Council (IATA‐CSIC)PaternaValencia46980Spain
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Yao Y, Hu Y, Yang J, Zhang C, He Y, Qi H, Zeng Y, Zhang A, Liu X, Zhu X. Inhibition of neuronal nitric oxide synthase protects against hippocampal neuronal injuries by increasing neuropeptide Y expression in temporal lobe epilepsy mice. Free Radic Biol Med 2022; 188:45-61. [PMID: 35714846 DOI: 10.1016/j.freeradbiomed.2022.06.221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 04/23/2022] [Accepted: 06/11/2022] [Indexed: 10/18/2022]
Abstract
Neuronal nitric oxide synthase (nNOS) plays a pivotal role in the pathological process of neuronal injury in the development of epilepsy. Our previous study has demonstrated that nitric oxide (NO) derived from nNOS in the epileptic brain is neurotoxic due to its reaction with the superoxide radical with the formation of peroxynitrite. Neuropeptide Y (NPY) is widely expressed in the mammalian brain, which has been implicated in energy homeostasis and neuroprotection. Recent studies suggest that nNOS may act as a mediator of NPY signaling. Here in this study, we sought to determine whether NPY expression is regulated by nNOS, and if so, whether the regulation of NPY by nNOS is associated with the neuronal injuries in the hippocampus of epileptic brain. Our results showed that pilocarpine-induced temporal lobe epilepsy (TLE) mice exhibited an increased level of nNOS expression and a decreased level of NPY expression along with hippocampal neuronal injuries and cognition deficit. Genetic deletion of nNOS gene, however, significantly upregulated hippocampal NPY expression and reduced TLE-induced hippocampal neuronal injuries and cognition decline. Knockdown of NPY abolished nNOS depletion-induced neuroprotection and cognitive improvement in the TLE mice, suggesting that inhibition of nNOS protects against hippocampal neuronal injuries by increasing neuropeptide Y expression in TLE mice. Targeting nNOS-NPY signaling pathway in the epileptic brain might provide clinical benefit by attenuating neuronal injuries and preventing cognitive deficits in epilepsy patients.
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Affiliation(s)
- Yuanyuan Yao
- Department of Pharmacology, Medical School of Southeast University, Nanjing, China
| | - Yang Hu
- Department of Pharmacology, Medical School of Southeast University, Nanjing, China
| | - Jiurong Yang
- Department of Pharmacology, Medical School of Southeast University, Nanjing, China
| | - Canyu Zhang
- Department of Pharmacology, Medical School of Southeast University, Nanjing, China
| | - Yuqi He
- Department of Pharmacology, Medical School of Southeast University, Nanjing, China
| | - Honggang Qi
- Department of Pharmacology, Medical School of Southeast University, Nanjing, China
| | - Yu Zeng
- National Residents Clinical Skills Training Center, Medical School of Southeast University, Nanjing, China
| | - Aifeng Zhang
- Department of Pathology, Medical School of Southeast University, Nanjing, China
| | - Xiufang Liu
- Department of Pathogenic Biology and Immunology, Medical School of Southeast University, Nanjing, China
| | - Xinjian Zhu
- Department of Pharmacology, Medical School of Southeast University, Nanjing, China.
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5
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Litter Size Reduction as a Model of Overfeeding during Lactation and Its Consequences for the Development of Metabolic Diseases in the Offspring. Nutrients 2022; 14:nu14102045. [PMID: 35631188 PMCID: PMC9145223 DOI: 10.3390/nu14102045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/10/2022] [Accepted: 05/10/2022] [Indexed: 02/06/2023] Open
Abstract
Overfeeding during lactation has a deleterious impact on the baby’s health throughout life. In humans, early overnutrition has been associated with higher susceptibility to obesity and metabolic disorders in childhood and adulthood. In rodents, using a rodent litter size reduction model (small litter) to mimic early overfeeding, the same metabolic profile has been described. Therefore, the rodent small litter model is an efficient tool to investigate the adaptive mechanisms involved in obesogenesis. Besides central and metabolic dysfunctions, studies have pointed to the contribution of the endocrine system to the small litter phenotype. Hormones, especially leptin, insulin, and adrenal hormones, have been associated with satiety, glucose homeostasis, and adipogenesis, while hypothyroidism impairs energy metabolism, favoring obesity. Behavioral modifications, hepatic metabolism changes, and reproductive dysfunctions have also been reported. In this review, we update these findings, highlighting the interaction of early nutrition and the adaptive features of the endocrine system. We also report the sex-related differences and epigenetic mechanisms. This model highlights the intense plasticity during lactation triggering many adaptive responses, which are the basis of the developmental origins of health and disease (DOHaD) concept. Our review demonstrates the complexity of the adaptive mechanisms involved in the obesity phenotype promoted by early overnutrition, reinforcing the necessity of adequate nutritional habits during lactation.
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Picó C, Palou M. Leptin and Metabolic Programming. Nutrients 2021; 14:nu14010114. [PMID: 35010989 PMCID: PMC8746998 DOI: 10.3390/nu14010114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 12/16/2021] [Indexed: 12/23/2022] Open
Abstract
This Special Issue of Nutrients "Leptin and Metabolic Programming" includes one review article regarding the function of leptin throughout the entire life on cardiometabolic fates and four original articles related to the new function of leptin present in milk and liquid amniotic, its possible relation with other components of breast milk, and how environmental conditions may impact on leptin action and metabolic programming [...].
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Affiliation(s)
- Catalina Picó
- Laboratory of Molecular Biology, Nutrition and Biotechnology (Nutrigenomics, Biomarkers and Risk Evaluation), University of the Balearic Islands, 07122 Palma, Spain;
- Health Research Institute of the Balearic Islands (IdISBa), 07122 Palma, Spain
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), 07122 Palma, Spain
- Correspondence:
| | - Mariona Palou
- Laboratory of Molecular Biology, Nutrition and Biotechnology (Nutrigenomics, Biomarkers and Risk Evaluation), University of the Balearic Islands, 07122 Palma, Spain;
- Health Research Institute of the Balearic Islands (IdISBa), 07122 Palma, Spain
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), 07122 Palma, Spain
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7
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Calcaterra V, Verduci E, Magenes VC, Pascuzzi MC, Rossi V, Sangiorgio A, Bosetti A, Zuccotti G, Mameli C. The Role of Pediatric Nutrition as a Modifiable Risk Factor for Precocious Puberty. Life (Basel) 2021; 11:1353. [PMID: 34947884 PMCID: PMC8706413 DOI: 10.3390/life11121353] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/04/2021] [Accepted: 12/06/2021] [Indexed: 12/19/2022] Open
Abstract
Puberty is a critical phase of growth and development characterized by a complex process regulated by the neuroendocrine system. Precocious puberty (PP) is defined as the appearance of physical and hormonal signs of pubertal development at an earlier age than is considered normal. The timing of puberty has important public health, clinical, and social implications. In fact, it is crucial in psychological and physical development and can impact future health. Nutritional status is considered as one of the most important factors modulating pubertal development. This narrative review presents an overview on the role of nutritional factors as determinants of the timing of sexual maturation, focusing on early-life and childhood nutrition. As reported, breast milk seems to have an important protective role against early puberty onset, mainly due to its positive influence on infant growth rate and childhood overweight prevention. The energy imbalance, macro/micronutrient food content, and dietary patterns may modulate the premature activation of the hypothalamic-pituitary-gonadal axis, inducing precocious activation of puberty. An increase in knowledge on the mechanism whereby nutrients may influence puberty will be useful in providing adequate nutritional recommendations to prevent PP and related complications.
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Affiliation(s)
- Valeria Calcaterra
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
- Pediatric and Adolescent Unit, Department of Internal Medicine, University of Pavia, 27100 Pavia, Italy
| | - Elvira Verduci
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
- Department of Health Sciences, University of Milan, 20142 Milan, Italy
| | - Vittoria Carlotta Magenes
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
| | - Martina Chiara Pascuzzi
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
| | - Virginia Rossi
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
| | - Arianna Sangiorgio
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
| | - Alessandra Bosetti
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
| | - Gianvincenzo Zuccotti
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
- Department of Biomedical and Clinical Science “L. Sacco”, University of Milan, 20157 Milan, Italy
| | - Chiara Mameli
- Pediatric Department, “Vittore Buzzi” Children’s Hospital, 20154 Milan, Italy; (V.C.); (V.C.M.); (M.C.P.); (V.R.); (A.S.); (A.B.); (G.Z.); (C.M.)
- Department of Biomedical and Clinical Science “L. Sacco”, University of Milan, 20157 Milan, Italy
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8
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de Paula DG, Bohlen TM, Zampieri TT, Mansano NS, Vieira HR, Gusmao DO, Wasinski F, Donato J, Frazao R. Distinct effects of growth hormone deficiency and disruption of hypothalamic kisspeptin system on reproduction of male mice. Life Sci 2021; 285:119970. [PMID: 34562435 DOI: 10.1016/j.lfs.2021.119970] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 09/08/2021] [Accepted: 09/16/2021] [Indexed: 12/30/2022]
Abstract
Growth hormone (GH) deficiency is a common cause of late sexual maturation and fertility issues. To determine whether GH-induced effects on reproduction are associated with alterations in hypothalamic kisspeptin system, we studied the male reproduction in two distinct GH deficiency mouse models. In the first model, mice present GH deficiency secondary to arcuate nucleus of the hypothalamus (ARH) lesions induced by posnatal monosodium glutamate (MSG) injections. MSG-induced ARH lesions led to significant reductions in hypothalamic Ghrh mRNA expression and consequently growth. Hypothalamic Kiss1 mRNA expression and Kiss1-expressing cells in the ARH were disrupted in the MSG-treated mice. In contrast, kisspeptin immunoreactivity remained preserved in the anteroventral periventricular and rostral periventricular nuclei (AVPV/PeN) of MSG-treated mice. Importantly, ARH lesions caused late sexual maturation and infertility in male mice. In our second mouse model, we studied animals profound GH deficiency due to a loss-of-function mutation in the Ghrhr gene (Ghrhrlit/lit mice). Interestingly, although Ghrhrlit/lit mice exhibited late puberty onset, hypothalamic Kiss1 mRNA expression and hypothalamic kisspeptin fiber density were normal in Ghrhrlit/lit mice. Despite presenting dwarfism, the majority of Ghrhrlit/lit male mice were fertile. These findings suggest that spontaneous GH deficiency during development does not compromise the kisspeptin system. Furthermore, ARH Kiss1-expressing neurons are required for fertility, while AVPV/PeN kisspeptin expression is sufficient to allow maturation of the hypothalamic-pituitary-gonadal axis in male mice.
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Affiliation(s)
- Daniella G de Paula
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Tabata M Bohlen
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Thais Tessari Zampieri
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Naira S Mansano
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Henrique R Vieira
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Daniela O Gusmao
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Frederick Wasinski
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Jose Donato
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Renata Frazao
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
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Trujillo V, Mir FR, Suárez MM, Vivas L. Hyperosmolarity-induced vasopressin expression and intrinsic excitability of supraoptic neurons of adult offspring are changed by early maternal separation. Psychoneuroendocrinology 2021; 130:105282. [PMID: 34051655 DOI: 10.1016/j.psyneuen.2021.105282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/31/2021] [Accepted: 05/19/2021] [Indexed: 11/29/2022]
Abstract
Adverse early life experiences can produce long-lasting changes in neurocircuits. The aim of this study was to investigate the programming effects of early maternal separation on the adult offspring vasopressin system. We hypothesized that subjecting adult rats to 4.5 h of daily maternal separation between postnatal days 1 - 21 will have altered hyperosmolarity-induced Avp expression and the response of supraoptic (SON) neurons to electrical and osmotic stimulation. We measured Avp mRNA and hn-RNA in the SON and in the paraventricular nucleus (PVN) by quantitative PCR, and assessed the intrinsic excitability of magnocellular SON neurons as well as their osmotic responses by the patch-clamp technique. In maternally-separated rats we found that basal and osmolarity-induced Avp mRNA gene expression was upregulated in the SON, whereas osmolarity-induced Avp hn-RNA gene expression was abolished. Similarly, in the PVN of maternally-separated rats the osmolarity-induced Avp mRNA gene expression was blunted. The supraoptic neurons of separated rats also had greater excitability than those of non-separated rats. Our results indicate that early maternal separation has long-term consequences on basal and hyperosmolarity-induced Avp hypothalamic expression as well as on the intrinsic excitability of magnocellular supraoptic neurons.
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Affiliation(s)
- V Trujillo
- Cátedra de Fisiología Animal, FCEFyN, Universidad Nacional de Córdoba, Argentina; Laboratorio de Balance Hidrosalino e Hipertensión. Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba, Argentina; Instituto de Investigaciones en Ciencias de la Salud (INICSA-CONICET), Córdoba, Argentina
| | - F R Mir
- Cátedra de Fisiología Animal, FCEFyN, Universidad Nacional de Córdoba, Argentina; Cátedra de Fisiología Animal, DACEFyN, Universidad Nacional de La Rioja, Argentina; Instituto de Investigaciones en Ciencias de la Salud (INICSA-CONICET), Córdoba, Argentina
| | - M M Suárez
- Cátedra de Fisiología Animal, FCEFyN, Universidad Nacional de Córdoba, Argentina; Instituto de Investigaciones en Ciencias de la Salud (INICSA-CONICET), Córdoba, Argentina
| | - L Vivas
- Cátedra de Fisiología Animal, FCEFyN, Universidad Nacional de Córdoba, Argentina; Laboratorio de Balance Hidrosalino e Hipertensión. Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba, Argentina.
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