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Chaudron Y, Boyer C, Marmonier C, Plourde M, Vachon A, Delplanque B, Taouis M, Pifferi F. A vegetable fat-based diet delays psychomotor and cognitive development compared with maternal dairy fat intake in infant gray mouse lemurs. Commun Biol 2024; 7:609. [PMID: 38769408 PMCID: PMC11106064 DOI: 10.1038/s42003-024-06255-w] [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: 11/17/2023] [Accepted: 04/26/2024] [Indexed: 05/22/2024] Open
Abstract
Dairy fat has a unique lipid profile; it is rich in short- and medium-chain saturated fatty acids that induce ketone production and has a balanced ω6/ω3 ratio that promotes cognitive development in early life. Moreover, the high consumption of vegetable oils in pregnant and lactating women raises concerns regarding the quality of lipids provided to offspring. Here, we investigate maternal dairy fat intake during gestation and lactation in a highly valuable primate model for infant nutritional studies, the gray mouse lemur (Microcebus murinus). Two experimental diets are provided to gestant mouse lemurs: a dairy fat-based (DF) or vegetable fat-based diet (VF). The psychomotor performance of neonates is tested during their first 30 days. Across all tasks, we observe more successful neonates born to mothers fed a DF diet. A greater rate of falls is observed in 8-day-old VF neonates, which is associated with delayed psychomotor development. Our findings suggest the potential benefits of lipids originating from a lactovegetarian diet compared with those originating from a vegan diet for the psychomotor development of neonates.
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Affiliation(s)
- Yohann Chaudron
- UMR CNRS MNHN 7179, 1 avenue du Petit Château, 91800, Brunoy, France.
| | - Constance Boyer
- Centre national interprofessionnel de l'économie laitière, 42 rue de Châteaudun, 75314, Paris cedex 09, France
| | - Corinne Marmonier
- Centre national interprofessionnel de l'économie laitière, 42 rue de Châteaudun, 75314, Paris cedex 09, France
| | - Mélanie Plourde
- Centre de Recherche sur le Vieillissement, CIUSSS de l'Estrie - CHUS, 1036 Belvédère sud, Sherbrooke, J1H 4C4, Canada
- Département de Médecine, Université de Sherbrooke, Sherbrooke, Canada
| | - Annick Vachon
- Centre de Recherche sur le Vieillissement, CIUSSS de l'Estrie - CHUS, 1036 Belvédère sud, Sherbrooke, J1H 4C4, Canada
| | - Bernadette Delplanque
- UMR 9197, Paris-Saclay Institute of Neurosciences (NeuroPSI), University of Paris-Saclay, CNRS, 151 route de la Rotonde, F-91400, Saclay, France
| | - Mohammed Taouis
- UMR 9197, Paris-Saclay Institute of Neurosciences (NeuroPSI), University of Paris-Saclay, CNRS, 151 route de la Rotonde, F-91400, Saclay, France
| | - Fabien Pifferi
- UMR CNRS MNHN 7179, 1 avenue du Petit Château, 91800, Brunoy, France.
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2
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Neto JM, Costalonga LG, Pires NO, Carpanez TG, Gomes FBR, Bottrel SEC, Silva JBG, Otenio MH, de Oliveira Pereira R. Yeast estrogen screen assay applied in the assessment of estrogenic activity removal from dairy cattle wastewater treated by anaerobic digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168243. [PMID: 37939957 DOI: 10.1016/j.scitotenv.2023.168243] [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: 06/26/2023] [Revised: 10/22/2023] [Accepted: 10/29/2023] [Indexed: 11/10/2023]
Abstract
The presence of estrogen-like endocrine disrupting chemicals (EEDC) in surface waters, soils, and groundwater has been frequently reported in the literature. Since these compounds can be excreted by humans and animals, the release of domestic sewage and animal wastewaters may be an important source of EEDC in the environment. In this context, there is a growing concern regarding the presence of these substances in the environment and their potential adverse effects on human health. However, most studies have been focused on the presence of EEDC in domestic wastewaters and the available information regarding EEDC in livestock wastewater is still limited. Therefore, this work aimed to quantify the estrogenic activity (EA) in the liquid phase of dairy cattle wastewaters and evaluate the removal of EA during anaerobic digestion, applying an adapted methodology based on the yeast estrogen screen (YES) assay, which has been widely used to analyze EA in domestic sewage. Influent and effluent dairy cattle wastewater samples from a full-scale anaerobic digester placed in an experimental farm were collected during seven months. EA concentrations in the liquid phase of raw wastewater ranged from 228 to 2182 ng.L-1 E2-eq. Anaerobic digestion was not efficient in EA removal, achieving effluent concentrations ranging from 109 to 946 ng.L-1 E2-eq. Results also indicate that the application of an estradiol-based fixed time artificial insemination protocol did not statistically contribute to the increase of EA concentrations in dairy cattle wastewater which reuse in cleaning of animal feeding operation facilities and fertigation are beneficial and economically advantageous to dairy production systems, reducing water demand in parallel to promoting organic matter and nutrient recycling. However, the potential environmental and health risks associated with the presence of EEDC in dairy cattle wastewaters should be better elucidated and evaluated.
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Affiliation(s)
- João Monteiro Neto
- Department of Sanitary and Environmental Engineering, Faculty of Engineering, Federal University of Juiz de Fora, Rua José Lourenço Kelmer, s/n - São Pedro, Juiz de Fora, MG CEP 36036-900, Brazil.
| | - Lorena Gotelip Costalonga
- Department of Sanitary and Environmental Engineering, Faculty of Engineering, Federal University of Juiz de Fora, Rua José Lourenço Kelmer, s/n - São Pedro, Juiz de Fora, MG CEP 36036-900, Brazil.
| | - Nathacha Oliveira Pires
- Department of Sanitary and Environmental Engineering, Faculty of Engineering, Federal University of Juiz de Fora, Rua José Lourenço Kelmer, s/n - São Pedro, Juiz de Fora, MG CEP 36036-900, Brazil.
| | - Thais Girardi Carpanez
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, 6627 Antonio Carlos Avenue, Campus Pampulha, MG, Brazil.
| | - Fernanda Bento Rosa Gomes
- Department of Civil, Faculty of Engineering, Federal University of Juiz de Fora. Rua José Lourenço Kelmer, s/n - São Pedro, Juiz de Fora, MG CEP 36036-900, Brazil.
| | - Sue Ellen Costa Bottrel
- Faculty of Engineering, Federal University of Juiz de Fora, Rua José Lourenço Kelmer, s/n - São Pedro, Juiz de Fora, MG CEP 36036-900, Brazil.
| | - Jonathas Batista Gonçalves Silva
- Faculty of Engineering, Federal University of Juiz de Fora, Rua José Lourenço Kelmer, s/n - São Pedro, Juiz de Fora, MG CEP 36036-900, Brazil.
| | - Marcelo Henrique Otenio
- Researcher at Embrapa Dairy Cattle (Brazilian Agricultural Research Corporation - Embrapa), Av. Eugênio do Nascimento, 610 - Aeroporto, Juiz de Fora, MG CEP 36038-330, Brazil.
| | - Renata de Oliveira Pereira
- Faculty of Engineering, Federal University of Juiz de Fora, Rua José Lourenço Kelmer, s/n - São Pedro, Juiz de Fora, MG CEP 36036-900, Brazil.
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Martine P, Aude A. Parental age at conception on mouse lemur's offspring longevity: Sex-specific maternal effects. PLoS One 2022; 17:e0265783. [PMID: 36580457 PMCID: PMC9799291 DOI: 10.1371/journal.pone.0265783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 11/22/2022] [Indexed: 12/30/2022] Open
Abstract
Parental age at conception often influences offspring's longevity, a phenomenon referred as the "Lansing effect" described in large variety of organisms. But, the majority of the results refer to the survival of juveniles, mainly explained by an inadequate parental care by the elderly parents, mostly the mothers. Studies on the effect of parental age on offspring's longevity in adulthood remain few, except in humans for whom effects of parental age vary according to statistical models or socioeconomic environments. In a small primate in which the longevity reaches up to 13 years, we investigated the effects of parental age at conception on the longevity of offspring (N = 278) issued from parents with known longevity. None of the postnatal parameters (body mass at 30 and 60 days after birth, size and composition of the litter) influenced offspring's longevity. Mothers' age at conception negatively affected offspring's longevity in males but not in females. By contrast, fathers' age at conception did not influence offspring's longevity. Finally, the longevity of female offspring was significantly positively related to the longevity of both parents. Compared with current studies, the surprisingly minor effect of fathers 'age was related to the high seasonal reproduction and the particular telomere biology of mouse lemurs.
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Affiliation(s)
- Perret Martine
- UMR 7179, Adaptive mechanisms and Evolution, MECADEV, Brunoy, France
- * E-mail:
| | - Anzeraey Aude
- UMR 7179, Adaptive mechanisms and Evolution, MECADEV, Brunoy, France
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Naidu SJ, Arangasamy A, Selvaraju S, Binsila BK, Reddy IJ, Ravindra JP, Bhatta R. Maternal influence on the skewing of offspring sex ratio: a review. ANIMAL PRODUCTION SCIENCE 2022. [DOI: 10.1071/an21086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Jia Q, Fang L, Wang Z, Wu Z, Yan Y, Liu B, Cheng JC, Sun YP. Ovarian Hyperstimulation Syndrome Is Associated with a High Secondary Sex Ratio in Fresh IVF Cycles with Cleavage-Stage Embryo Transfer: Results for a Cohort Study. Reprod Sci 2021; 28:3341-3351. [PMID: 34081318 DOI: 10.1007/s43032-021-00637-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 05/25/2021] [Indexed: 11/29/2022]
Abstract
The sex ratio at birth is defined as the secondary sex ratio (SSR). Ovarian hyperstimulation syndrome (OHSS) is a serious and iatrogenic complication associated with controlled ovarian stimulation (COS) during assisted reproductive technology (ART) treatments. It has been hypothesized that the human SSR is partially controlled by parental hormone levels around the time of conception. Given the aberrant hormonal profiles observed in patients with OHSS, this retrospective study was designed to evaluate the impact of OHSS on the SSR. In this study, all included patients were divided into 3 groups: non-OHSS (n=2777), mild OHSS (n=644), and moderate OHSS (n=334). Our results showed that the overall SSR for the study population was 1.033. The SSR was significantly increased in patients with moderate OHSS (1.336) compared to non-OHSS patients (1.002) (p=0.048). Subgroup analyses showed that increases in the SSR in patients with moderate OHSS were observed in the IVF group (1.323 vs 1.052; p=0.043), but not in the ICSI groups (1.021 vs 0.866; p=0.732). In addition, the elevated serum estradiol (E2) and progesterone (P4) levels in OHSS patients were not associated with SSR. In this study, for the first time, we report that a high SSR is associated with OHSS in patients who received fresh IVF treatments. The increases in SSR in OHSS patients are not attributed to the high serum E2 and P4 levels. Our findings may make both ART clinicians and patients more aware of the influences of ART treatments on the SSR and allow clinicians to counsel patients more appropriately.
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Affiliation(s)
- Qiongqiong Jia
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, 40, Daxue Road, Zhengzhou, 450052, Henan, China
| | - Lanlan Fang
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, 40, Daxue Road, Zhengzhou, 450052, Henan, China.
| | - Zhen Wang
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, 40, Daxue Road, Zhengzhou, 450052, Henan, China
| | - Ze Wu
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, 40, Daxue Road, Zhengzhou, 450052, Henan, China
| | - Yang Yan
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, 40, Daxue Road, Zhengzhou, 450052, Henan, China
| | - Boqun Liu
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, 40, Daxue Road, Zhengzhou, 450052, Henan, China
| | - Jung-Chien Cheng
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, 40, Daxue Road, Zhengzhou, 450052, Henan, China
| | - Ying-Pu Sun
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, 40, Daxue Road, Zhengzhou, 450052, Henan, China
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Ho CLA, Zimmermann R, Flórez Weidinger JD, Prsa M, Schottdorf M, Merlin S, Okamoto T, Ikezoe K, Pifferi F, Aujard F, Angelucci A, Wolf F, Huber D. Orientation Preference Maps in Microcebus murinus Reveal Size-Invariant Design Principles in Primate Visual Cortex. Curr Biol 2020; 31:733-741.e7. [PMID: 33275889 PMCID: PMC9026768 DOI: 10.1016/j.cub.2020.11.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/08/2020] [Accepted: 11/11/2020] [Indexed: 01/05/2023]
Abstract
Orientation preference maps (OPMs) are a prominent feature of primary visual cortex (V1) organization in many primates and carnivores. In rodents, neurons are not organized in OPMs but are instead interspersed in a “salt and pepper” fashion, although clusters of orientation-selective neurons have been reported. Does this fundamental difference reflect the existence of a lower size limit for orientation columns (OCs) below which they cannot be scaled down with decreasing V1 size? To address this question, we examined V1 of one of the smallest living primates, the 60-g prosimian mouse lemur (Microcebus murinus). Using chronic intrinsic signal imaging, we found that mouse lemur V1 contains robust OCs, which are arranged in a pinwheel-like fashion. OC size in mouse lemurs was found to be only marginally smaller compared to the macaque, suggesting that these circuit elements are nearly incompressible. The spatial arrangement of pinwheels is well described by a common mathematical design of primate V1 circuit organization. In order to accommodate OPMs, we found that the mouse lemur V1 covers one-fifth of the cortical surface, which is one of the largest V1-to-cortex ratios found in primates. These results indicate that the primate-type visual cortical circuit organization is constrained by a size limitation and raises the possibility that its emergence might have evolved by disruptive innovation rather than gradual change. Orientation preference maps are a hallmark of V1 organization in all primates studied thus far, yet they are absent in rodents. It is uncertain whether these structures scale with body or brain size. Using intrinsic signal imaging, Ho et al. reveal the presence of such maps in the V1 of the world’s smallest primate, the mouse lemur (Microcebus murinus).
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Affiliation(s)
- Chun Lum Andy Ho
- University of Geneva, Department of Basic Neurosciences, Rue Michel Servet 1, Geneva 1211, Switzerland
| | - Robert Zimmermann
- University of Geneva, Department of Basic Neurosciences, Rue Michel Servet 1, Geneva 1211, Switzerland
| | | | - Mario Prsa
- University of Geneva, Department of Basic Neurosciences, Rue Michel Servet 1, Geneva 1211, Switzerland
| | - Manuel Schottdorf
- Max Planck Institute for Dynamics and Self-Organization, Am Faßberg 17, Göttingen 37077, Germany
| | - Sam Merlin
- Moran Eye Center, University of Utah, Department of Ophthalmology and Visual Science, 65 Mario Capecchi Drive, Salt Lake City, UT 84132, USA
| | - Tsuyoshi Okamoto
- Kyushu University, Faculty of Arts and Science, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan
| | - Koji Ikezoe
- Center for Information and Neural Networks, Osaka University and National Institute of Information and Communications Technology, Graduate School of Frontier Biosciences, 1-3 Yamadaoka Suita, Osaka 565-0871, Japan
| | - Fabien Pifferi
- UMR CNRS/MNHN 7179, Mécanismes Adaptatifs et Evolution, 1 Avenue du Petit Chateau, Brunoy 91800, France
| | - Fabienne Aujard
- UMR CNRS/MNHN 7179, Mécanismes Adaptatifs et Evolution, 1 Avenue du Petit Chateau, Brunoy 91800, France
| | - Alessandra Angelucci
- Moran Eye Center, University of Utah, Department of Ophthalmology and Visual Science, 65 Mario Capecchi Drive, Salt Lake City, UT 84132, USA
| | - Fred Wolf
- Max Planck Institute for Dynamics and Self-Organization, Am Faßberg 17, Göttingen 37077, Germany; Campus Institute for Dynamics of Biological Networks, Hermann-Rein-Straße 3, Göttingen 37075, Germany; Bernstein Center for Computational Neuroscience, Hermann-Rein-Straße 3, Göttingen 37075, Germany; Max Planck Institute of Experimental Medicine, Hermann-Rein-Straße 3, Göttingen 37075, Germany; Institute for Dynamics of Complex Systems, Georg-August University, Friedrich-Hund-Platz 1, Göttingen 37073, Germany
| | - Daniel Huber
- University of Geneva, Department of Basic Neurosciences, Rue Michel Servet 1, Geneva 1211, Switzerland.
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Fritz RG, Zimmermann E, Picq JL, Lautier C, Meier M, Kästner S, Schmidtke D. Sex-specific patterns of age-related cerebral atrophy in a nonhuman primate Microcebus murinus. Neurobiol Aging 2020; 91:148-159. [PMID: 32229027 DOI: 10.1016/j.neurobiolaging.2020.02.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 02/25/2020] [Accepted: 02/27/2020] [Indexed: 12/13/2022]
Abstract
Steadily aging populations result in a growing need for research regarding age-related brain alterations and neurodegenerative pathologies. By allowing a good translation of results to humans, nonhuman primates, such as the gray mouse lemur Microcebus murinus, have gained attention in this field. Our aim was to examine correlations between atrophy-induced brain alterations and age, with special focus on sex differences in mouse lemurs. For cerebral volumetric measurements, in vivo magnetic resonance imaging was performed on 59 animals (28♀♀/31♂♂) aged between 1.0 to 11.9 years. Volumes of different brain regions, cortical thicknesses, and ventricular expansions were evaluated. Analyses revealed significant brain atrophies with increasing age, particularly around the caudate nucleus, the thalamus, and frontal, parietal, and temporo-occipital regions. Especially old females showed a strong decline in cingulate cortex thickness and had higher values of ventricular expansion, whereas cortical thickness of the splenium and occipital regions decreased mainly in males. Our study, thus, provides first evidence for sex-specific, age-related brain alterations in a nonhuman primate, suggesting that mouse lemurs can help elucidating the mechanism underlying sex disparities in cerebral aging, for which there is mixed evidence in humans.
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Affiliation(s)
- Rebecca G Fritz
- Institute of Zoology, University of Veterinary Medicine Hannover, Hannover, Germany.
| | - Elke Zimmermann
- Institute of Zoology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Jean-Luc Picq
- Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud, Université Paris-Saclay, Neurodegenerative Diseases Laboratory, Fontenay-aux-Roses, France; Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Direction de la Recherche Fondamentale (DRF), Institut François Jacob, MIRCen, Fontenay-aux-Roses, France; Laboratoire de Psychopathologie et de Neuropsychologie, Université Paris 8, St Denis, France
| | - Corinne Lautier
- MMDN, University of Montpellier, EPHE, INSERM, U1198, PSL University, Montpellier, France
| | - Martin Meier
- ZTL-Imaging, Institute of Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Sabine Kästner
- Small Animal Clinic, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Daniel Schmidtke
- Institute of Zoology, University of Veterinary Medicine Hannover, Hannover, Germany
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8
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Perret M. Litter sex composition affects first reproduction in female grey mouse lemurs (Microcebus murinus). Physiol Behav 2019; 208:112575. [DOI: 10.1016/j.physbeh.2019.112575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 06/05/2019] [Accepted: 06/05/2019] [Indexed: 01/25/2023]
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Perret M. Revisiting the Trivers-Willard theory on birth sex ratio bias: Role of paternal condition in a Malagasy primate. PLoS One 2018; 13:e0209640. [PMID: 30576370 PMCID: PMC6303032 DOI: 10.1371/journal.pone.0209640] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 12/10/2018] [Indexed: 11/19/2022] Open
Abstract
Within current theories on potential adaptive manipulation of offspring sex ratio, giving birth to a male or to a female is assumed to depend on the capacity of the mother to invest in offspring to maximize her fitness. The active role of the father in sex ratio bias at birth has been neglected until recently. The human sex ratio at birth is biased towards sons, although in occidental populations, the ratio has decreased regularly for 30 years and could be the consequence of the adverse effects of environmental chemicals on male hormones. In a Malagasy primate, the lesser mouse lemur, the potential effect of paternal testosterone levels on sex ratio bias at birth was tested on 130 litters (278 babies) produced in 52 mixed-sex groups. For each group, social dominance among males was characterized based on aggressive interactions and sexual behaviours. Using a multi correspondence analysis, high testosterone levels in grouped males, particularly those of the dominant male, were significantly correlated with more infants produced in male-biased litters, independent of the female condition. According to these results, predictions for sex ratio bias towards one sex or the other in mouse lemurs were discussed considering the influence of both parents.
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Affiliation(s)
- Martine Perret
- UMR Mecadev 7179 CNRS-MNHN, Département Adaptations du Vivant, Brunoy, France
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Le Corre M, Noristani HN, Mestre-Frances N, Saint-Martin GP, Coillot C, Goze-Bac C, Lonjon N, Perrin FE. A Novel Translational Model of Spinal Cord Injury in Nonhuman Primate. Neurotherapeutics 2018; 15:751-769. [PMID: 29181770 PMCID: PMC6095780 DOI: 10.1007/s13311-017-0589-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Spinal cord injuries (SCI) lead to major disabilities affecting > 2.5 million people worldwide. Major shortcomings in clinical translation result from multiple factors, including species differences, development of moderately predictive animal models, and differences in methodologies between preclinical and clinical studies. To overcome these obstacles, we first conducted a comparative neuroanatomical analysis of the spinal cord between mice, Microcebus murinus (a nonhuman primate), and humans. Next, we developed and characterized a new model of lateral spinal cord hemisection in M. murinus. Over a 3-month period after SCI, we carried out a detailed, longitudinal, behavioral follow-up associated with in vivo magnetic resonance imaging (1H-MRI) monitoring. Then, we compared lesion extension and tissue alteration using 3 methods: in vivo 1H-MRI, ex vivo 1H-MRI, and classical histology. The general organization and glial cell distribution/morphology in the spinal cord of M. murinus closely resembles that of humans. Animals assessed at different stages following lateral hemisection of the spinal cord presented specific motor deficits and spinal cord tissue alterations. We also found a close correlation between 1H-MRI signal and microglia reactivity and/or associated post-trauma phenomena. Spinal cord hemisection in M. murinus provides a reliable new nonhuman primate model that can be used to promote translational research on SCI and represents a novel and more affordable alternative to larger primates.
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Affiliation(s)
- Marine Le Corre
- INSERM U1051, Rue Augustin Fliche, F-34095, Montpellier Cedex 5, France
- CHRU Montpellier, Gui de Chauliac Hospital, F-34095, Montpellier, France
| | - Harun N Noristani
- INSERM U1051, Rue Augustin Fliche, F-34095, Montpellier Cedex 5, France
- INSERM U1198, University of Montpellier, EPHE, Place Eugène Bataillon CC105, F-34095, Montpellier, France
| | - Nadine Mestre-Frances
- INSERM U1198, University of Montpellier, EPHE, PSL Research University, Place Eugène Bataillon CC105, F-34095, Montpellier, France
| | - Guillaume P Saint-Martin
- INSERM U1198, University of Montpellier, EPHE, Place Eugène Bataillon CC105, F-34095, Montpellier, France
- CNRS UMR 5221, University of Montpellier, Place Eugène Bataillon, F-34095, Montpellier, France
| | - Christophe Coillot
- CNRS UMR 5221, University of Montpellier, Place Eugène Bataillon, F-34095, Montpellier, France
| | - Christophe Goze-Bac
- CNRS UMR 5221, University of Montpellier, Place Eugène Bataillon, F-34095, Montpellier, France
| | - Nicolas Lonjon
- CHRU Montpellier, Gui de Chauliac Hospital, F-34095, Montpellier, France
- INSERM U1198, University of Montpellier, EPHE, Place Eugène Bataillon CC105, F-34095, Montpellier, France
| | - Florence E Perrin
- INSERM U1051, Rue Augustin Fliche, F-34095, Montpellier Cedex 5, France.
- INSERM U1198, University of Montpellier, EPHE, Place Eugène Bataillon CC105, F-34095, Montpellier, France.
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11
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Female reproductive activity and its endocrine correlates in the African lesser bushbaby, Galago moholi. J Comp Physiol B 2015; 186:255-64. [DOI: 10.1007/s00360-015-0947-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 11/16/2015] [Accepted: 11/23/2015] [Indexed: 10/22/2022]
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12
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Kim TB, Oh JK, Kim KT, Yoon SJ, Kim SW. Does the Mother or Father Determine the Offspring Sex Ratio? Investigating the Relationship between Maternal Digit Ratio and Offspring Sex Ratio. PLoS One 2015; 10:e0143054. [PMID: 26575995 PMCID: PMC4648576 DOI: 10.1371/journal.pone.0143054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 10/30/2015] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE In mammals, high parental testosterone levels present around the time of conception are thought to skew offspring sex ratio toward sons. The second to fourth digit ratio (digit ratio) is now widely accepted as a negative correlate of prenatal testosterone. Thus, we investigated the association between digit ratio and offspring sex ratio. METHODS A total of 508 Korean patients (257 males and 251 females) less than 60 years old who had one or more offspring were prospectively enrolled. The lengths of the 2nd and 4th digits of the right hand were measured by a single investigator using a digital vernier calliper. Next, the patients' lifetime offspring birth sex ratios were investigated. RESULTS Maternal (rather than paternal) digit ratio was significantly associated with the number of sons (r = -0.153, p = 0.015), number of daughters (r = 0.130, p = 0.039), and offspring sex ratio (r = -0.171, p = 0.007). And, the maternal digit ratio was a significant factor for predicting offspring sex ratio (B = -1.620, p = 0.008) on multiple linear regression analysis. The female patients with a lower digit ratio (< 0.95) were found to have a higher offspring sex ratio (0.609 versus 0.521, p = 0.046) compared to those with a higher digit ratio (≥ 0.95). Furthermore, females in the low digit ratio group have a probability 1.138 greater of having sons than females in the high digit ratio group. CONCLUSIONS Maternal digit ratio was negatively associated with offspring sex ratio. Females with a lower digit ratio were more likely to have more male offspring compared to those with a higher digit ratio. Thus, our results suggest that the sex of offspring might be more influenced by maternal rather than paternal factors.
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Affiliation(s)
- Tae Beom Kim
- Department of Urology, Gachon University Gil Hospital, Incheon, Republic of Korea
| | - Jin Kyu Oh
- Department of Urology, Gachon University Gil Hospital, Incheon, Republic of Korea
| | - Kwang Taek Kim
- Department of Urology, Gachon University Gil Hospital, Incheon, Republic of Korea
| | - Sang Jin Yoon
- Department of Urology, Gachon University Gil Hospital, Incheon, Republic of Korea
| | - Soo Woong Kim
- Department of Urology, Seoul National University Hospital, Seoul, Republic of Korea
- * E-mail:
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LeTallec T, Théry M, Perret M. Effects of light pollution on seasonal estrus and daily rhythms in a nocturnal primate. J Mammal 2015. [DOI: 10.1093/jmammal/gyv047] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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14
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Languille S, Liévin-Bazin A, Picq JL, Louis C, Dix S, De Barry J, Blin O, Richardson J, Bordet R, Schenker E, Djelti F, Aujard F. Deficits of psychomotor and mnesic functions across aging in mouse lemur primates. Front Behav Neurosci 2015; 8:446. [PMID: 25620921 PMCID: PMC4288241 DOI: 10.3389/fnbeh.2014.00446] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 12/10/2014] [Indexed: 11/23/2022] Open
Abstract
Owing to a similar cerebral neuro-anatomy, non-human primates are viewed as the most valid models for understanding cognitive deficits. This study evaluated psychomotor and mnesic functions of 41 young to old mouse lemurs (Microcebus murinus). Psychomotor capacities and anxiety-related behaviors decreased abruptly from middle to late adulthood. However, mnesic functions were not affected in the same way with increasing age. While results of the spontaneous alternation task point to a progressive and widespread age-related decline of spatial working memory, both spatial reference and novel object recognition (NOR) memory tasks did not reveal any tendency due to large inter-individual variability in the middle-aged and old animals. Indeed, some of the aged animals performed as well as younger ones, whereas some others had bad performances in the Barnes maze and in the object recognition test. Hierarchical cluster analysis revealed that declarative-like memory was strongly impaired only in 7 out of 25 middle-aged/old animals. These results suggest that this analysis allows to distinguish elder populations of good and bad performers in this non-human primate model and to closely compare this to human aging.
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Affiliation(s)
- Solène Languille
- UMR 7179, Centre National de la Recherche Scientifique, Muséum National d'Histoire Naturelle France Brunoy, France
| | - Agatha Liévin-Bazin
- UMR 7179, Centre National de la Recherche Scientifique, Muséum National d'Histoire Naturelle France Brunoy, France
| | - Jean-Luc Picq
- UMR 7179, Centre National de la Recherche Scientifique, Muséum National d'Histoire Naturelle France Brunoy, France ; Laboratoire de Psychopathologie et de Neuropsychologie, EA 2027, Université Paris 8 St-Denis, France
| | - Caroline Louis
- Institut de Recherches Servier Croissy-sur-Seine, France
| | | | - Jean De Barry
- INCI UPR3212 CNRS et Innovative Health Diagnostics Strasbourg, France
| | - Olivier Blin
- Centre de Pharmacologie Clinique et d'Evaluations Thérapeutiques-CIC, Timone CNRS-INT-Aix Marseille Université Marseille, France
| | - Jill Richardson
- GlaxoSmithKline, R&D China U.K. Group Stevenage Stevenage, UK
| | - Régis Bordet
- Département de Pharmacologie Médicale, EA 1046, Université Lille Nord de France, UDSL, Faculté de Médecine CHU, Lille, France
| | | | - Fathia Djelti
- UMR 7179, Centre National de la Recherche Scientifique, Muséum National d'Histoire Naturelle France Brunoy, France
| | - Fabienne Aujard
- UMR 7179, Centre National de la Recherche Scientifique, Muséum National d'Histoire Naturelle France Brunoy, France
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Rezagholizadeh A, Gharagozlou F, Akbarinejad V, Youssefi R. Left-Sided Ovulation Favors More Male Foals Than Right-Sided Ovulation in Thoroughbred Mares. J Equine Vet Sci 2015. [DOI: 10.1016/j.jevs.2014.11.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Yoder AD, Larsen PA. The molecular evolutionary dynamics of the vomeronasal receptor (class 1) genes in primates: a gene family on the verge of a functional breakdown. Front Neuroanat 2014; 8:153. [PMID: 25565978 PMCID: PMC4264469 DOI: 10.3389/fnana.2014.00153] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 11/25/2014] [Indexed: 01/24/2023] Open
Abstract
Olfaction plays a critical role in both survival of the individual and in the propagation of species. Studies from across the mammalian clade have found a remarkable correlation between organismal lifestyle and molecular evolutionary properties of receptor genes in both the main olfactory system (MOS) and the vomeronasal system (VNS). When a large proportion of intact (and putatively functional) copies is observed, the inference is made that a particular mode of chemoreception is critical for an organism’s fit to its environment and is thus under strong positive selection. Conversely, when the receptors in question show a disproportionately large number of pseudogene copies, this contraction is interpreted as evidence of relaxed selection potentially leading to gene family extinction. Notably, it appears that a risk factor for gene family extinction is a high rate of nonsynonymous substitution. A survey of intact vs. pseudogene copies among primate vomeronasal receptor Class one genes (V1Rs) appears to substantiate this hypothesis. Molecular evolutionary complexities in the V1R gene family combine rapid rates of gene duplication, gene conversion, lineage-specific expansions, deletions, and/or pseudogenization. An intricate mix of phylogenetic footprints and current adaptive landscapes have left their mark on primate V1Rs suggesting that the primate clade offers an ideal model system for exploring the molecular evolutionary and functional properties of the VNS of mammals. Primate V1Rs tell a story of ancestral function and divergent selection as species have moved into ever diversifying adaptive regimes. The sensitivity to functional collapse in these genes, consequent to their precariously high rates of nonsynonymous substitution, confer a remarkable capacity to reveal the lifestyles of the genomes that they presently occupy as well as those of their ancestors.
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Affiliation(s)
- Anne D Yoder
- Department of Biology, Duke University Durham, NC, USA
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Yoder AD, Chan LM, dos Reis M, Larsen PA, Campbell CR, Rasoloarison R, Barrett M, Roos C, Kappeler P, Bielawski J, Yang Z. Molecular evolutionary characterization of a V1R subfamily unique to strepsirrhine primates. Genome Biol Evol 2014; 6:213-27. [PMID: 24398377 PMCID: PMC3914689 DOI: 10.1093/gbe/evu006] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Vomeronasal receptor genes have frequently been invoked as integral to the establishment and maintenance of species boundaries among mammals due to the elaborate one-to-one correspondence between semiochemical signals and neuronal sensory inputs. Here, we report the most extensive sample of vomeronasal receptor class 1 (V1R) sequences ever generated for a diverse yet phylogenetically coherent group of mammals, the tooth-combed primates (suborder Strepsirrhini). Phylogenetic analysis confirms our intensive sampling from a single V1R subfamily, apparently unique to the strepsirrhine primates. We designate this subfamily as V1Rstrep. The subfamily retains extensive repertoires of gene copies that descend from an ancestral gene duplication that appears to have occurred prior to the diversification of all lemuriform primates excluding the basal genus Daubentonia (the aye-aye). We refer to the descendent clades as V1Rstrep-α and V1Rstrep-β. Comparison of the two clades reveals different amino acid compositions corresponding to the predicted ligand-binding site and thus potentially to altered functional profiles between the two. In agreement with previous studies of the mouse lemur (genus, Microcebus), the majority of V1Rstrep gene copies appear to be intact and under strong positive selection, particularly within transmembrane regions. Finally, despite the surprisingly high number of gene copies identified in this study, it is nonetheless probable that V1R diversity remains underestimated in these nonmodel primates and that complete characterization will be limited until high-coverage assembled genomes are available.
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Emadi SR, Rezaei A, Bolourchi M, Hovareshti P, Akbarinejad V. Administration of estradiol benzoate before insemination could skew secondary sex ratio toward males in Holstein dairy cows. Domest Anim Endocrinol 2014; 48:110-8. [PMID: 24906936 DOI: 10.1016/j.domaniend.2014.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 03/05/2014] [Accepted: 03/05/2014] [Indexed: 11/21/2022]
Abstract
The present study was conducted to investigate the effect of estradiol benzoate administration before insemination on secondary sex ratio (proportion of male calves at birth) in Holstein dairy cows. Cows (n = 1,647) were randomly assigned to 2 experimental groups by parity over a 1-yr period. Cows in the control group (n = 827; 232 primiparous and 595 multiparous cows) received 2 administrations of PGF2α (500 μg) 14 d apart, started at 30 to 35 d postpartum. Twelve d after the second PGF2α injection, cows received GnRH (100 μg), followed by administration of PGF2α 7 d later. Cows in the treatment group (n = 820; 238 primiparous and 582 multiparous cows) received the same hormonal administrations as the cows in the control group. Additionally, cows in the treatment group received estradiol benzoate (1 mg) 1 d after the third PGF2α injection. Estrus detection by visual observation was started 1 d after the third PGF2α injection and after estradiol administration in the control (for 6 d) and treatment (for 36 h) groups, respectively. Artificial insemination was carried out 12 h after observation of standing estrus. Exposure of cows to heat stress at conception was determined based on temperature-humidity index. Estrus detection rate was lower in primiparous than in multiparous cows (P < 0.05), but conception rate was higher in primiparous vs multiparous cows (P < 0.05). Estradiol administration improved estrus detection rate and fertility (P < 0.05); moreover, it increased secondary sex ratio (adjusted odds ratio: 1.645; P = 0.017). Exposure to heat stress diminished heat detection rate and fertility (P < 0.05), and altered secondary sex ratio toward males (adjusted odds ratio: 2.863; P = 0.012). In conclusion, the present study revealed that estradiol administration before insemination could improve fertility and increase the probability of calves being male in Holstein dairy cows. Moreover, the results showed that cows exposed to heat stress around conception had diminished fertility and increased secondary sex ratio.
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Affiliation(s)
- S R Emadi
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran; Theriogenology Association, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - A Rezaei
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - M Bolourchi
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - P Hovareshti
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - V Akbarinejad
- Young Researchers and Elites Club, North Tehran Branch, Islamic Azad University, Tehran, Iran.
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Languille S, Blanc S, Blin O, Canale CI, Dal-Pan A, Devau G, Dhenain M, Dorieux O, Epelbaum J, Gomez D, Hardy I, Henry PY, Irving EA, Marchal J, Mestre-Francés N, Perret M, Picq JL, Pifferi F, Rahman A, Schenker E, Terrien J, Théry M, Verdier JM, Aujard F. The grey mouse lemur: a non-human primate model for ageing studies. Ageing Res Rev 2012; 11:150-62. [PMID: 21802530 DOI: 10.1016/j.arr.2011.07.001] [Citation(s) in RCA: 128] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 07/04/2011] [Accepted: 07/08/2011] [Indexed: 01/27/2023]
Abstract
The use of non-human primate models is required to understand the ageing process and evaluate new therapies against age-associated pathologies. The present article summarizes all the contributions of the grey mouse lemur Microcebus murinus, a small nocturnal prosimian primate, to the understanding of the mechanisms of ageing. Results from studies of both healthy and pathological ageing research on the grey mouse lemur demonstrated that this animal is a unique model to study age-dependent changes in endocrine systems, biological rhythms, thermoregulation, sensorial, cerebral and cognitive functions.
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Gomez D, Huchard E, Henry PY, Perret M. Mutual mate choice in a female-dominant and sexually monomorphic primate. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2011; 147:370-9. [DOI: 10.1002/ajpa.21653] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Accepted: 11/06/2011] [Indexed: 11/09/2022]
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21
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Fukuda M, Fukuda K, Tatsumi K, Shimizu T, Nobunaga M, Byskov AG, Yding Andersen C. The ovulation pattern during three consecutive menstrual cycles has a significant impact on pregnancy rate and sex of the offspring. Fertil Steril 2011; 95:2545-7. [DOI: 10.1016/j.fertnstert.2011.02.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Revised: 02/01/2011] [Accepted: 02/03/2011] [Indexed: 11/26/2022]
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22
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Blanco MB. Timely estrus in wild brown mouse lemur females at Ranomafana National Park, southeastern Madagascar. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2011; 145:311-7. [PMID: 21469075 DOI: 10.1002/ajpa.21503] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2010] [Accepted: 01/06/2011] [Indexed: 11/06/2022]
Abstract
The small-bodied nocturnal mouse lemurs (genus Microcebus) occupy a variety of habitats in Madagascar. Gray (M. murinus) and brown (M. rufus) mouse lemurs have been widely studied both in the wild and captivity. Whereas captive studies revealed an endogenous regulation of reproduction entrained by photoperiod, field studies have suggested that reproductive activation could be affected by additional climatic, physical, or social conditions. I collected data on wild brown mouse lemur females at Ranomafana between 2004 and 2008 to determine: 1) the timing of estrus and estrous periodicities across multiple seasons, and 2) whether additional factors such as body mass, age, or rainfall are correlated with onset of reproduction. In mouse lemur females at Ranomafana, the first seasonal estrus occurs 3-4 weeks after the vernal equinox. I report ~1 month's intra-population variation in the timing of estrus and inter-annual estrous intervals with periodicities of ~365 days. There were significant differences between the onset of reproduction across years. Estrous onset was uncorrelated with body mass, but there was an apparent age effect. There was a significant negative correlation between August rainfall and onset of reproduction when 2004 data were removed from the analysis. Results from this study are consistent with the notion that timing of estrus is photoperiod-dependent. As in captivity, intra-population variation in estrous onset is ~4 weeks in length. In the wild, variation in estrous onset and polyestry (multiple reproductive opportunities per year) appear to be favored under the highly unpredictable conditions of Madagascar's environments. In the wild, variation in estrous onset and polyestry (multiple reproductive opportunities per year) appear to be favored under the highly unpredictable conditions of Madagascar's environments.
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Affiliation(s)
- Marina B Blanco
- Department of Anthropology, University of Massachusetts, Amherst, MA 01003, USA.
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23
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Fukuda M, Fukuda K, Shimizu T, Nobunaga M, Grete Byskov A, Yding Andersen C. The sex ratio of offspring is associated with the mothers' age at menarche. Hum Reprod 2011; 26:1551-4. [DOI: 10.1093/humrep/der107] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Marealle WN, Fossøy F, Holmern T, Stokke BG, Røskaft E. Does illegal hunting skew Serengeti wildlife sex ratios? WILDLIFE BIOLOGY 2010. [DOI: 10.2981/10-035] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Grant VJ, Chamley LW. Can mammalian mothers influence the sex of their offspring peri-conceptually? Reproduction 2010; 140:425-33. [PMID: 20591970 DOI: 10.1530/rep-10-0137] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Although controversial, growing evidence from evolutionary biology suggests that the mammalian mother may have a role in influencing the sex of her offspring. However, there is competing information on the molecular mechanisms by which such influence could be manifested. The new initiatives are based on hypotheses from evolutionary biology: the 'good condition' hypothesis, which suggests that post conception, higher levels of maternal glucose may differentially promote the development of male embryos; and the 'maternal dominance' hypothesis, which proposes that before conception, higher follicular testosterone may influence the development of the ovum so that it emerges already adapted to receive an X- or a Y-chromosome-bearing spermatozoon. Now, it seems these hypothesised mechanisms could be operating in synchrony, each complementing and reinforcing the other. On the other hand, there are continuing problems in identifying a precise sequence of mechanisms as evidenced from research in sperm-sorting. Research on high-fat diets and the sex ratio in polytocous species may indicate important differences in proximate mechanisms for sex allocation between polytocous and monotocous mammals.
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Affiliation(s)
- Valerie J Grant
- Department of Psychological Medicine Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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Blanco MB, Meyer JS. Assessing reproductive profiles in female brown mouse lemurs (Microcebus rufus) from Ranomafana National Park, southeast Madagascar, using fecal hormone analysis. Am J Primatol 2009; 71:439-46. [DOI: 10.1002/ajp.20672] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Helle S, Lilley T. Maternal 2nd to 4th digit ratio does not predict lifetime offspring sex ratio at birth. Am J Hum Biol 2008; 20:700-3. [PMID: 18561146 DOI: 10.1002/ajhb.20796] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Samuli Helle
- Department of Biology, Section of Ecology, University of Turku, FI-20014 Turku, Finland.
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Reproductive Schedules of Female Microcebus rufus at Ranomafana National Park, Madagascar. INT J PRIMATOL 2008. [DOI: 10.1007/s10764-008-9238-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Perret M, Aujard F. Aging and season affect plasma dehydroepiandrosterone sulfate (DHEA-S) levels in a primate. Exp Gerontol 2006; 40:582-7. [PMID: 16019179 DOI: 10.1016/j.exger.2005.05.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Revised: 05/17/2005] [Accepted: 05/17/2005] [Indexed: 11/17/2022]
Abstract
In humans, plasma concentration of dehydroepiandrosterone sulfate (DHEA-S) declines with age and is considered as a potential predictor of longevity. DHEA-S is apparently unique to primates but few species of nonhuman primates have been studied for age-related changes in DHEA-S. In a short living primate, the grey mouse lemur (longevity 10-13 years), metabolic and physiological parameters exhibit high seasonal changes with age-related decrease in amplitude. From 8 month- to 11-year-old males (N = 175), plasma DHEA-S levels were measured either during the breeding season or during the winter sexual rest. Plasma DHEA-S levels show high significant changes according to season and age. During winter, DHEA-S levels were maintained low and constant over lifetime. During the summer breeding season, a decline of DHEA-S levels occurred after the age of 3 years and accelerated after the age of 6 years. DHEA-S level was about 30-40% of its adult value with age over 6 years, a stepwise pattern most closely resembling to human pattern. In mouse lemur, DHEA-S met the criteria for a biomarker of aging. When correlated to other age-related changes, the results give the opportunity to consider the mouse lemur as a promising primate model to study aging processes.
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Perret M. Reply: Relationship between estrogen urinary levels before conception and sex ratio at birth in a primate, the gray mouse lemur. Hum Reprod 2005. [DOI: 10.1093/humrep/dei226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Cagnacci A. Relationship between urinary estrogen levels before conception and sex ratio at birth in a primate, the gray mouse lemur. Hum Reprod 2005; 20:3572-3; author reply 3573. [PMID: 16308334 DOI: 10.1093/humrep/dei225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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