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Guettari T, Istrate D, Boudy J, Benkelfet BE, Fumel B, Daviet JC. Design and first evaluation of a sleep characterization monitoring system using remote contactless sensor. IEEE J Biomed Health Inform 2017; 21:1511-1523. [PMID: 28113334 DOI: 10.1109/jbhi.2016.2639823] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This paper presents the design and a first evaluation of a new monitoring system based on contactless sensors to estimate sleep quality. This sensor produces thermal signals which have been used, at first, to detect a human presence in the bed and then to estimate sleep quality. To distinguish between different sleep phases, we have used methods of signal processing in order to extract the necessary features for learning an adapted statistical model. The existing monitoring systems use sensors attached to the bed or worn by the person. We propose in this paper a system based on a passive thermal sensor which has the advantage of being fixed on the wall, thus it is easier to use and more reliable. We explain different signal processing steps and describe sleep stage recognition algorithms. We propose an adaptation of the SAX method for the thermal signal. Finally, we evaluate our system in comparison with a polysomnographic recording system in the Hospital (CHU) of Limoges.
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Fouchécourt S, Livera G, Messiaen S, Fumel B, Parent AS, Marine JC, Monget P. Apoptosis of Sertoli cells after conditional ablation of murine double minute 2 (Mdm2) gene is p53-dependent and results in male sterility. Cell Death Differ 2015; 23:521-30. [PMID: 26470726 PMCID: PMC5072445 DOI: 10.1038/cdd.2015.120] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 07/03/2015] [Accepted: 07/31/2015] [Indexed: 01/21/2023] Open
Abstract
Beside its well-documented role in carcinogenesis, the function of p53 family has been more recently revealed in development and female reproduction, but it is still poorly documented in male reproduction. We specifically tested this possibility by ablating Mdm2, an E3 ligase that regulates p53 protein stability and transactivation function, specifically in Sertoli cells (SCs) using the AMH-Cre line and created the new SC-Mdm2−/− line. Heterozygous SC-Mdm2−/+ adult males were fertile, but SC-Mdm2−/− males were infertile and exhibited: a shorter ano-genital distance, an extra duct along the vas deferens that presents a uterus-like morphology, degenerated testes with no organized seminiferous tubules and a complete loss of differentiated germ cells. In adults, testosterone levels as well as StAR, P450c17 (Cyp17a1) and P450scc (Cyp11a1) mRNA levels decreased significantly, and both plasma LH and FSH levels increased. A detailed investigation of testicular development indicated that the phenotype arose during fetal life, with SC-Mdm2−/− testes being much smaller at birth. Interestingly, Leydig cells remained present until adulthood and fetal germ cells abnormally initiated meiosis. Inactivation of Mdm2 in SCs triggered p53 activation and apoptosis as early as 15.5 days post conception with significant increase in apoptotic SCs. Importantly, testis development occurred normally in SC-Mdm2−/− lacking p53 mice (SC-Mdm2−/−p53−/−) and accordingly, these mice were fertile indicating that the aforementioned phenotypes are entirely p53-dependent. These data not only highlight the importance of keeping p53 in check for proper testicular development and male fertility but also certify the critical role of SCs in the maintenance of meiotic repression.
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Affiliation(s)
- S Fouchécourt
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.,CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.,Université François Rabelais de Tours, F-37041 Tours, France.,IFCE, F-37380 Nouzilly, France
| | - G Livera
- Laboratoire de Développement des Gonades, INSERM U967, CEA/DSV/iRCM/SCSR/LDG, Univ Paris Diderot, Sorbonne Paris Cité, F-92265 Fontenay-Aux-Roses, France
| | - S Messiaen
- Laboratoire de Développement des Gonades, INSERM U967, CEA/DSV/iRCM/SCSR/LDG, Univ Paris Diderot, Sorbonne Paris Cité, F-92265 Fontenay-Aux-Roses, France
| | - B Fumel
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.,CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.,Université François Rabelais de Tours, F-37041 Tours, France.,IFCE, F-37380 Nouzilly, France
| | - A-S Parent
- Developmental Neuroendocrinology Unit, GIGA Neurosciences, University of Liège, CHU Sart Tilman, Liège, Belgium
| | - J-C Marine
- Laboratory for Molecular Cancer Biology, Center for Human Genetics, KU Leuven, Leuven, Belgium.,Center for the Biology of Disease, VIB, Leuven, Belgium
| | - P Monget
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.,CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France.,Université François Rabelais de Tours, F-37041 Tours, France.,IFCE, F-37380 Nouzilly, France
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Fumel B, Tchalla A, Seknazi A, Doré P, Salle J, Daviet J. Participative development of a new technological tool for supervision of older adults in nursing home: The e-monitor’age project example. Ann Phys Rehabil Med 2015. [DOI: 10.1016/j.rehab.2015.07.138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Fumel B, Froment P, Holzenberger M, Livera G, Monget P, Fouchécourt S. Expression of dominant-negative thyroid hormone receptor alpha1 in Leydig and Sertoli cells demonstrates no additional defect compared with expression in Sertoli cells only. PLoS One 2015; 10:e0119392. [PMID: 25793522 PMCID: PMC4368620 DOI: 10.1371/journal.pone.0119392] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 01/30/2015] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND In the testis, thyroid hormone (T3) regulates the number of gametes produced through its action on Sertoli cell proliferation. However, the role of T3 in the regulation of steroidogenesis is still controversial. METHODS The TRαAMI knock-in allele allows the generation of transgenic mice expressing a dominant-negative TRα1 (thyroid receptor α1) isoform restricted to specific target cells after Cre-loxP recombination. Here, we introduced this mutant allele in both Sertoli and Leydig cells using a novel aromatase-iCre (ARO-iCre) line that expresses Cre recombinase under control of the human Cyp19(IIa)/aromatase promoter. FINDINGS We showed that loxP recombination induced by this ARO-iCre is restricted to male and female gonads, and is effective in Sertoli and Leydig cells, but not in germ cells. We compared this model with the previous introduction of TRαAMI specifically in Sertoli cells in order to investigate T3 regulation of steroidogenesis. We demonstrated that TRαAMI-ARO males exhibited increased testis weight, increased sperm reserve in adulthood correlated to an increased proliferative index at P3 in vivo, and a loss of T3-response in vitro. Nevertheless, TRαAMI-ARO males showed normal fertility. This phenotype is similar to TRαAMI-SC males. Importantly, plasma testosterone and luteinizing hormone levels, as well as mRNA levels of steroidogenesis enzymes StAR, Cyp11a1 and Cyp17a1 were not affected in TRαAMI-ARO. CONCLUSIONS/SIGNIFICANCE We concluded that the presence of a mutant TRαAMI allele in both Leydig and Sertoli cells does not accentuate the phenotype in comparison with its presence in Sertoli cells only. This suggests that direct T3 regulation of steroidogenesis through TRα1 is moderate in Leydig cells, and that Sertoli cells are the main target of T3 action in the testis.
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Affiliation(s)
- Betty Fumel
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380, Nouzilly, France
- CNRS, UMR7247 Physiologie de la Reproduction et des Comportements, F-37380, Nouzilly, France
- Université François Rabelais de Tours, F-37041, Tours, France
- IFCE, F-37380, Nouzilly, France
| | - Pascal Froment
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380, Nouzilly, France
- CNRS, UMR7247 Physiologie de la Reproduction et des Comportements, F-37380, Nouzilly, France
- Université François Rabelais de Tours, F-37041, Tours, France
- IFCE, F-37380, Nouzilly, France
| | - Martin Holzenberger
- INSERM and Sorbonne Universités—UPMC, UMRS 938, Hôpital Saint-Antoine, 75012, Paris, France
| | - Gabriel Livera
- Laboratoire de Développement des Gonades, INSERM U967, CEA/DSV/iRCM/SCSR/LDG, Univ Paris Diderot, Sorbonne Paris Cité, Univ Paris Sud, F-92265, Fontenay-Aux-Roses, France
| | - Philippe Monget
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380, Nouzilly, France
- CNRS, UMR7247 Physiologie de la Reproduction et des Comportements, F-37380, Nouzilly, France
- Université François Rabelais de Tours, F-37041, Tours, France
- IFCE, F-37380, Nouzilly, France
| | - Sophie Fouchécourt
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380, Nouzilly, France
- CNRS, UMR7247 Physiologie de la Reproduction et des Comportements, F-37380, Nouzilly, France
- Université François Rabelais de Tours, F-37041, Tours, France
- IFCE, F-37380, Nouzilly, France
- * E-mail:
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Chatonnet F, Livera G, Fumel B, FouchÉCourt S, Flamant F. Direct and indirect consequences on gene expression of a thyroid hormone receptor alpha 1 mutation restricted to Sertoli cells. Mol Reprod Dev 2014; 81:1159-66. [PMID: 25487743 DOI: 10.1002/mrd.22437] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 10/22/2014] [Indexed: 01/29/2023]
Abstract
Thyroid hormone is required for the timely transition of Sertoli cells from proliferative to differentiating and maturing. This transition takes place during a critical developmental period in mammals, which in mice is the first post-natal week. In order to identify the underlying molecular mechanisms of this differentiation process, we used Cre/loxP technology to selectively block the function of the thyroid hormone receptor TRα1 in Sertoli cells. We then used RNA-seq to analyze the changes in gene expression induced in the post-natal testis. This differential analysis provides genetic clues to the initial testicular defects resulting from disrupted thyroid hormone signaling, and suggests that Sertoli cells influence germ cells soon after their birth.
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Affiliation(s)
- Fabrice Chatonnet
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, INRA, CNRS, Cedex, France
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Fumel B, Roy S, Fouchécourt S, Livera G, Parent AS, Casas F, Guillou F. Depletion of the p43 mitochondrial T3 receptor increases Sertoli cell proliferation in mice. PLoS One 2013; 8:e74015. [PMID: 24040148 PMCID: PMC3767600 DOI: 10.1371/journal.pone.0074015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 07/26/2013] [Indexed: 01/01/2023] Open
Abstract
Among T3 receptors, TRα1 is ubiquitous and its deletion or a specific expression of a dominant-negative TRα1 isoform in Sertoli cell leads to an increase in testis weight and sperm production. The identification of a 43-kDa truncated form of the nuclear receptor TRα1 (p43) in the mitochondrial matrix led us to test the hypothesis that this mitochondrial transcription factor could regulate Sertoli cell proliferation. Here we report that p43 depletion in mice increases testis weight and sperm reserve. In addition, we found that p43 deletion increases Sertoli cell proliferation in postnatal testis at 3 days of development. Electron microscopy studies evidence an alteration of mitochondrial morphology observed specifically in Sertoli cells of p43−/− mice. Moreover, gene expression studies indicate that the lack of p43 in testis induced an alteration of the mitochondrial-nuclear cross-talk. In particular, the up-regulation of Cdk4 and c-myc pathway in p43−/− probably explain the extended proliferation recorded in Sertoli cells of these mice. Our finding suggests that T3 limits post-natal Sertoli cell proliferation mainly through its mitochondrial T3 receptor p43.
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Affiliation(s)
- Betty Fumel
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
- CNRS, UMR7247 Physiologie de la Reproduction et des Comportements, Nouzilly, France
- Université François Rabelais de Tours, Tours, France
- IFCE, Nouzilly, France
| | - Stéphanie Roy
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Sophie Fouchécourt
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Gabriel Livera
- Université Paris Diderot, Sorbonne Paris Cité, INSERM U967, CEA/DSV/iRCM/SCSR Laboratoire de Développement des Gonades, Fontenay-Aux-Roses, France
| | - Anne-Simone Parent
- Developmental Neuroendocrinology Unit, GIGA Neurosciences, University of Liège, CHU Sart Tilman, Liège, Belgium
| | - François Casas
- INRA, UMR 866 Dynamique Musculaire et métabolisme, Montpellier, France
- Université de Montpellier 1 et 2, Montpellier, France
| | - Florian Guillou
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
- * E-mail:
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Pitetti JL, Calvel P, Zimmermann C, Conne B, Papaioannou MD, Aubry F, Cederroth CR, Urner F, Fumel B, Crausaz M, Docquier M, Herrera PL, Pralong F, Germond M, Guillou F, Jégou B, Nef S. An essential role for insulin and IGF1 receptors in regulating sertoli cell proliferation, testis size, and FSH action in mice. Mol Endocrinol 2013; 27:814-27. [PMID: 23518924 DOI: 10.1210/me.2012-1258] [Citation(s) in RCA: 159] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Testis size and sperm production are directly correlated to the total number of adult Sertoli cells (SCs). Although the establishment of an adequate number of SCs is crucial for future male fertility, the identification and characterization of the factors regulating SC survival, proliferation, and maturation remain incomplete. To investigate whether the IGF system is required for germ cell (GC) and SC development and function, we inactivated the insulin receptor (Insr), the IGF1 receptor (Igf1r), or both receptors specifically in the GC lineage or in SCs. Whereas ablation of insulin/IGF signaling appears dispensable for GCs and spermatogenesis, adult testes of mice lacking both Insr and Igf1r in SCs (SC-Insr;Igf1r) displayed a 75% reduction in testis size and daily sperm production as a result of a reduced proliferation rate of immature SCs during the late fetal and early neonatal testicular period. In addition, in vivo analyses revealed that FSH requires the insulin/IGF signaling pathway to mediate its proliferative effects on immature SCs. Collectively, these results emphasize the essential role played by growth factors of the insulin family in regulating the final number of SCs, testis size, and daily sperm output. They also indicate that the insulin/IGF signaling pathway is required for FSH-mediated SC proliferation.
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Affiliation(s)
- Jean-Luc Pitetti
- Department of Genetic Medicine and Development, National Center of Competence in Research, Frontiers in Genetics, University of Geneva, 1211 Geneva 4, Switzerland
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Fumel B, Guerquin MJ, Livera G, Staub C, Magistrini M, Gauthier C, Flamant F, Guillou F, Fouchécourt S. Thyroid hormone limits postnatal Sertoli cell proliferation in vivo by activation of its alpha1 isoform receptor (TRalpha1) present in these cells and by regulation of Cdk4/JunD/c-myc mRNA levels in mice. Biol Reprod 2012; 87:16, 1-9. [PMID: 22539677 DOI: 10.1095/biolreprod.111.098418] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Hypo- and hyperthyroidism alter testicular functions in the young. Among T3 receptors, TRalpha1 is ubiquitous, and its previously described knockout leads to an increase in testis weight and sperm production. We tested, for the first time, the hypothesis that TRalpha1-dependent regulation of Sertoli cell (SC) proliferation was directly regulated by TRalpha1 present in these cells. Thus, after crossing with the AMH-Cre line, we generated and analyzed a new line that expressed a dominant-negative TRalpha1 isoform (TRalpha(AMI)) in SCs only. So-called TRalpha(AMI)-SC (TRalpha(AMI/+) Cre(+)) mice exhibited similar phenotypic features to the knockout line: heavier testicular weight and higher sperm reserve, in comparison with their adequate controls (TRalpha(AMI/+) Cre(-)). SC density increased significantly as a result of a higher proliferative index at ages Postnatal Day (P) 0 and P3. When explants of control testes were cultured (at age P3), a significant decrease in the proliferation of SCs was observed in response to an excess of T3. This response was not observed in the TRalpha(AMI)-SC and knockout lines. Finally, when TRalpha(AMI) is present in SCs, the phenotype observed is similar to that of the knockout line. This study demonstrates that T3 limits postnatal SC proliferation by activation of TRalpha1 present in these cells. Moreover, quantitative RT-PCR provided evidence that regulation of the Cdk4/JunD/c-myc pathway was involved in this negative control.
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Affiliation(s)
- Betty Fumel
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
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