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Capela D, Dombret C, Poissenot K, Poignant M, Malbert-Colas A, Franceschini I, Keller M, Mhaouty-Kodja S. Adult male mice exposure to nonylphenol alters courtship vocalizations and mating. Sci Rep 2018; 8:2988. [PMID: 29445187 PMCID: PMC5813014 DOI: 10.1038/s41598-018-21245-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 02/01/2018] [Indexed: 02/07/2023] Open
Abstract
The neural circuitry processing male sexual behavior is tightly regulated by testosterone and its neural metabolite estradiol. The present study evaluated the effects of adult exposure to low doses of nonylphenol (NP), a widespread environmental contaminant, on the neuroendocrine regulation of testosterone and expression of sexual behavior. Oral exposure of C57BL/6J males to NP (0.5, 5 or 50 μg/kg/day) for 4 weeks did not affect circulating levels of testosterone or the kisspeptin system, a key regulator of the gonadotropic axis. In contrast, mice exposed to NP at 5 μg/kg/day emitted an increased number and duration of ultrasonic vocalizations, took longer to reach ejaculation and showed increased number of mounts, intromissions and thrusts. This was associated with normal olfactory preference and locomotor activity, and increased anxiety level. Analysis of the neural circuitry that underlies sexual behavior showed changes in the number of cells expressing androgen and estrogen receptors in males exposed to NP at 5 μg/kg/day. The neural circuitry underlying sexual behavior is thus highly sensitive to adult exposure to NP. Furthermore, almost all the observed effects were induced at 5 μg/kg/day of NP, indicating that this endocrine disrupter triggers a non-monotonic response in the adult male mouse brain.
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Affiliation(s)
- Daphné Capela
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine-Institut de Biologie Paris Seine, Paris, 75005, France
| | - Carlos Dombret
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine-Institut de Biologie Paris Seine, Paris, 75005, France
| | - Kevin Poissenot
- Institut National de la Recherche Agronomique, UMR 85, Nouzilly, 37380, France.,Centre National de la Recherche Scientifique, UMR 7247, Nouzilly, 37380, France.,Université François Rabelais, Tours, 37000, France.,Institut Français du Cheval et de l'Equitation, Nouzilly, 37380, France
| | - Manon Poignant
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine-Institut de Biologie Paris Seine, Paris, 75005, France
| | - Aude Malbert-Colas
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine-Institut de Biologie Paris Seine, Paris, 75005, France
| | - Isabelle Franceschini
- Institut National de la Recherche Agronomique, UMR 85, Nouzilly, 37380, France.,Centre National de la Recherche Scientifique, UMR 7247, Nouzilly, 37380, France.,Université François Rabelais, Tours, 37000, France.,Institut Français du Cheval et de l'Equitation, Nouzilly, 37380, France
| | - Matthieu Keller
- Institut National de la Recherche Agronomique, UMR 85, Nouzilly, 37380, France.,Centre National de la Recherche Scientifique, UMR 7247, Nouzilly, 37380, France.,Université François Rabelais, Tours, 37000, France.,Institut Français du Cheval et de l'Equitation, Nouzilly, 37380, France
| | - Sakina Mhaouty-Kodja
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine-Institut de Biologie Paris Seine, Paris, 75005, France.
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Caillon H, Fréour T, Bach-Ngohou K, Colombel A, Denis MG, Barrière P, Masson D. Effects of female increased body mass index on in vitro fertilization cycles outcome. Obes Res Clin Pract 2015; 9:382-8. [PMID: 25769458 DOI: 10.1016/j.orcp.2015.02.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 01/14/2015] [Accepted: 02/11/2015] [Indexed: 02/04/2023]
Abstract
BACKGROUND As being overweight can impair female spontaneous fertility or after assisted reproductive technology (ART) cycles, the aim of this study was to compare in vitro fertilization (IVF) outcome according to women's body mass index (BMI). METHODS Retrospective study conducted from 2006 to 2009 in the IVF unit of Nantes University Hospital, France. 582 patients undergoing standard infertility workup and controlled ovarian stimulation were categorized according to BMI into two groups: group 1: normal weight (20-24.9 kg/m(2); n=409) and group 2: overweight and obese (≥25 kg/m(2); n=149). Basal hormonal status, smoking habitus, infertility duration, IVF cycle parameters and outcome were recorded. RESULTS Basal LH, FSH and estradiol levels were higher in group 1 than group 2, but ovarian reserve markers were comparable across the two BMI groups. Higher doses of gonadotropins were required in group 2 to obtain equivalent ovarian response than in group 1. No difference was observed on ovarian response and embryonic parameters. Cycle outcome were not significantly different between both groups, but we found a strong trend towards increasing transfer cancellation and miscarriage rates in group 2. CONCLUSION Although overweight and obesity do not compromise ovarian stimulation results whenever adaptation of recombinant FSH doses is made, our data suggest an increased risk of cancellation transfer and miscarriage rate, leading to poorer IVF outcome.
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Affiliation(s)
- Hélène Caillon
- Hormonology and Biochemistry Laboratory, CHU Nantes, France.
| | - Thomas Fréour
- Department of Human Reproduction, CHU Nantes, France
| | | | | | - Marc G Denis
- Hormonology and Biochemistry Laboratory, CHU Nantes, France
| | - Paul Barrière
- Department of Human Reproduction, CHU Nantes, France
| | - Damien Masson
- Hormonology and Biochemistry Laboratory, CHU Nantes, France
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Escobar S, Servili A, Espigares F, Gueguen MM, Brocal I, Felip A, Gómez A, Carrillo M, Zanuy S, Kah O. Expression of kisspeptins and kiss receptors suggests a large range of functions for kisspeptin systems in the brain of the European sea bass. PLoS One 2013; 8:e70177. [PMID: 23894610 PMCID: PMC3720930 DOI: 10.1371/journal.pone.0070177] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 06/16/2013] [Indexed: 02/07/2023] Open
Abstract
This study, conducted in the brain of a perciform fish, the European sea bass, aimed at raising antibodies against the precursor of the kisspeptins in order to map the kiss systems and to correlate the expression of kisspeptins, kiss1 and kiss2, with that of kisspeptin receptors (kiss-R1 and kiss-R2). Specific antibodies could be raised against the preprokiss2, but not the preoprokiss1. The data indicate that kiss2 neurons are mainly located in the hypothalamus and project widely to the subpallium and pallium, the preoptic region, the thalamus, the pretectal area, the optic tectum, the torus semicircularis, the mediobasal medial and caudal hypothalamus, and the neurohypophysis. These results were compared to the expression of kiss-R1 and kiss-R2 messengers, indicating a very good correlation between the wide distribution of Kiss2-positive fibers and that of kiss-R2 expressing cells. The expression of kiss-R1 messengers was more limited to the habenula, the ventral telencephalon and the proximal pars distalis of the pituitary. Attempts to characterize the phenotype of the numerous cells expressing kiss-R2 showed that neurons expressing tyrosine hydroxylase, neuropeptide Y and neuronal nitric oxide synthase are targets for kisspeptins, while GnRH1 neurons did not appear to express kiss-R1 or kiss-R2 messengers. In addition, a striking result was that all somatostatin-positive neurons expressed-kissR2. These data show that kisspeptins are likely to regulate a wide range of neuronal systems in the brain of teleosts.
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Affiliation(s)
- Sebastián Escobar
- Instituto de Acuicultura de Torre de la Sal, CSIC, Torre de la Sal, s/n, Ribera de Cabanes, Castellón, Spain
| | - Arianna Servili
- Research Institute in Health, Environment and Occupation, INSERM U1085, Université de Rennes 1, Campus de Beaulieu, Rennes, France
| | - Felipe Espigares
- Instituto de Acuicultura de Torre de la Sal, CSIC, Torre de la Sal, s/n, Ribera de Cabanes, Castellón, Spain
| | - Marie-Madeleine Gueguen
- Research Institute in Health, Environment and Occupation, INSERM U1085, Université de Rennes 1, Campus de Beaulieu, Rennes, France
| | - Isabel Brocal
- Instituto de Acuicultura de Torre de la Sal, CSIC, Torre de la Sal, s/n, Ribera de Cabanes, Castellón, Spain
| | - Alicia Felip
- Instituto de Acuicultura de Torre de la Sal, CSIC, Torre de la Sal, s/n, Ribera de Cabanes, Castellón, Spain
| | - Ana Gómez
- Instituto de Acuicultura de Torre de la Sal, CSIC, Torre de la Sal, s/n, Ribera de Cabanes, Castellón, Spain
| | - Manuel Carrillo
- Instituto de Acuicultura de Torre de la Sal, CSIC, Torre de la Sal, s/n, Ribera de Cabanes, Castellón, Spain
| | - Silvia Zanuy
- Instituto de Acuicultura de Torre de la Sal, CSIC, Torre de la Sal, s/n, Ribera de Cabanes, Castellón, Spain
| | - Olivier Kah
- Research Institute in Health, Environment and Occupation, INSERM U1085, Université de Rennes 1, Campus de Beaulieu, Rennes, France
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Reproductive axis response to repeated lipopolysaccharide administration in peripubertal female rats. J Physiol Biochem 2010; 66:237-44. [PMID: 20652472 DOI: 10.1007/s13105-010-0030-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Accepted: 06/23/2010] [Indexed: 10/19/2022]
Abstract
Immune system disorders are often accompanied by alterations in the reproductive axis. Several reports have shown that administration of bacterial lipopolysaccharide (LPS) has central inflammatory effects and activates cytokine release in the hypothalamus where the luteinizing hormone releasing hormone (Gn-RH) neurons are located. The present study was designed to investigate the effect of repeated LPS administration on the neuroendocrine mechanisms of control of the reproductive axis in peripubertal female rats (30-day-old rats). With this aim, LPS (50 mug/kg weight) was administered to the animals during 25, 27 and 29 days of age and sacrificed on 30 day of life. Gn-RH, gamma-amino butyric acid (GABA) and glutamic acid (GLU), two amino acids involved in the regulation of Gn-RH secretion, hypothalamic content were measured. LH and estradiol serum levels were also determined and the day of vaginal opening examined. The results showed a significant increase in Gn-RH and GLU content (p < 0.0001), shared by a reduction of GABA one (p < 0.0001). LH and estradiol serum levels were decreased (p < 0.01, p < 0.001) and delay in the day of vaginal opening was also observed in treated animals. Present results show that repeated LPS administration impaired reproductive function, modifying the neuroendocrine mechanisms of control of the axis in peripubertal female rats.
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