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Soula M, Messas NI, Aridhi S, Urbinelli R, Guyon A. Effects of trace element dietary supplements on voice parameters and some physiological and psychological parameters related to stress. Heliyon 2024; 10:e29127. [PMID: 38655294 PMCID: PMC11035998 DOI: 10.1016/j.heliyon.2024.e29127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 03/29/2024] [Accepted: 04/01/2024] [Indexed: 04/26/2024] Open
Abstract
Trace elements, often used as dietary supplements, are widely accessible without prescription at pharmacies. Pronutri has pioneered Nutripuncture®, a methodology that utilizes orally consumed trace elements to elicit a physiological response akin to that of acupuncture. Pronutri has empirically observed that the user's voice becomes deeper following an exclusive ingestion procedure. Given that alterations in vocal characteristics are often linked to stress, the Pronutri researchers postulated that the pills have the capacity to promptly alleviate stress upon ingestion. Nevertheless, there is a lack of scientific substantiation about the impact of these supplements on voice (or stress) indicators. The aim of this research was to determine whether there is a consistent impact of trace element ingestion on vocal characteristics, namely the fundamental frequency of the voice, as well as other physiological and psychological stress measurements. In order to achieve this objective, we have devised a unique methodology to examine this hypothesis. This involves conducting a monocentric crossover, randomized, triple-blind, placebo-controlled trial with a sample size of 43 healthy individuals. This study demonstrates that compared to placebo tablets, consuming 10 metal traces containing tablets at once is enough to cause noticeable changes in the vocal spectrum in the direction of an improvement of the voice timbre "richness", and a decrease in the occurrence of spontaneous electrodermal activity, suggesting a stress reduction. However, there were no significant changes observed in the other parameters that were tested. These parameters include vocal measures such as voice frequency F0, standard deviation from this frequency, jitter, and shimmer. Additionally, physiological measures such as respiratory rate, oxygenation and heart rate variability parameters, as well as psychological measures such as self-assessment analogic scales of anxiety, stress, muscle tension, and nervous tension, did not show any significant changes. Ultimately, our research revealed that the ingestion of 10 trace elements pills may promptly elicit a targeted impact on both vocal spectrum and electrodermal activity. Despite the limited impact, these findings warrant more research to explore the long-term effects of trace elements on voice and stress reduction.
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Affiliation(s)
- Maxime Soula
- Université Côte d'Azur, Institut Neuromod, Mod4NeuCog, France
| | | | - Slah Aridhi
- Sensoria Analytics, Sophia Antipolis, France
| | | | - Alice Guyon
- Université côte d'Azur, CNRS UMR 7275, Institut de Pharmacologie Moléculaire et Cellulaire, 660 route des Lucioles, 06560, Valbonne Sophia Antipolis, France
- Université Côte d'Azur, Institut Neuromod, Mod4NeuCog, France
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Marconi M, Do Carmo Blanco N, Zimmer C, Guyon A. Eye movements in response to different cognitive activities measured by eyetracking: a prospective study on some of the neurolinguistics programming theories. J Eye Mov Res 2023; 16:10.16910/jemr.16.2.2. [PMID: 38020584 PMCID: PMC10676768 DOI: 10.16910/jemr.16.2.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023] Open
Abstract
The eyes are in constant movement to optimize the interpretation of the visual scene by the brain. Eye movements are controlled by complex neural networks that interact with the rest of the brain. The direction of our eye movements could thus be influenced by our cognitive activity (imagination, internal dialogue, memory, etc.). A given cognitive activity could then cause the gaze to move in a specific direction (a brief movement that would be instinctive and unconscious). Neuro Linguistic Programming (NLP), which was developed in the 1970s by Richard Bandler and John Grinder (psychologist and linguist respectively), issued a comprehensive theory associating gaze directions with specific mental tasks. According to this theory, depending on the visual path observed, one could go back to the participant's thoughts and cognitive processes. Although NLP is widely used in many disciplines (communication, psychology, psychotherapy, marketing, etc), to date, few scientific studies have examined the validity of this theory. Using eye tracking, this study explores one of the hypotheses of this theory, which is one of the pillars of NLP on visual language. We created a protocol based on a series of questions of different types (supposed to engage different brain areas) and we recorded by eye tracking the gaze movements at the end of each question while the participants were thinking and elaborating on the answer. Our results show that 1) complex questions elicit significantly more eye movements than control questions that necessitate little reflection, 2) the movements are not random but are oriented in selected directions, according to the different question types, 3) the orientations observed are not those predicted by the NLP theory. This pilot experiment paves the way for further investigations to decipher the close links between eye movements and neural network activities in the brain.
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Affiliation(s)
| | | | | | - Alice Guyon
- Université Côte d'Azur- IPMC- CNRS UMR 7275, Valbonne, France
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Danieli K, Guyon A, Bethus I. Episodic Memory formation: A review of complex Hippocampus input pathways. Prog Neuropsychopharmacol Biol Psychiatry 2023; 126:110757. [PMID: 37086812 DOI: 10.1016/j.pnpbp.2023.110757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/08/2023] [Accepted: 03/22/2023] [Indexed: 04/24/2023]
Abstract
Memories of everyday experiences involve the encoding of a rich and dynamic representation of present objects and their contextual features. Traditionally, the resulting mnemonic trace is referred to as Episodic Memory, i.e. the "what", "where" and "when" of a lived episode. The journey for such memory trace encoding begins with the perceptual data of an experienced episode handled in sensory brain regions. The information is then streamed to cortical areas located in the ventral Medio Temporal Lobe, which produces multi-modal representations concerning either the objects (in the Perirhinal cortex) or the spatial and contextual features (in the parahippocampal region) of the episode. Then, this high-level data is gated through the Entorhinal Cortex and forwarded to the Hippocampal Formation, where all the pieces get bound together. Eventually, the resulting encoded neural pattern is relayed back to the Neocortex for a stable consolidation. This review will detail these different stages and provide a systematic overview of the major cortical streams toward the Hippocampus relevant for Episodic Memory encoding.
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Affiliation(s)
| | - Alice Guyon
- Université Cote d'Azur, Neuromod Institute, France; Université Cote d'Azur, CNRS UMR 7275, IPMC, Valbonne, France
| | - Ingrid Bethus
- Université Cote d'Azur, Neuromod Institute, France; Université Cote d'Azur, CNRS UMR 7275, IPMC, Valbonne, France
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Gustin MP, Putois B, Guyon A, Lecendreux M, Challamel MJ, Plancoulaine S, Bioulac-Rogier S, Schroder C, Royant-Parola S, Huguelet S, Franco P. French Sleepiness Scale for Adolescents-8 items: A discriminant and diagnostic validation. Encephale 2023; 49:109-116. [PMID: 36253180 DOI: 10.1016/j.encep.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 06/01/2022] [Accepted: 06/08/2022] [Indexed: 11/07/2022]
Abstract
The objective of the present study was to validate the Short Version of French Sleepiness Scale for Adolescents (FSSA) with eight items (FSSA8). METHODS A total of 384 adolescents, aged between 12 and 18 years, completed the FSSA8. These included 269 nonclinical adolescents and 115 adolescents admitted for overnight polysomnography and Multiple Sleep Latency Test (MSLT) because of suspected hypersomnia (85 patients with narcolepsy and 30 with other sleep disorders). Item response theory (IRT) assumptions were tested and psychometric properties were analysed. Matching on sex ratio and age was conducted to estimate concurrent criterion, diagnostic validity and cut-offs. RESULTS IRT assumptions were validated confirming the one-dimensionality of the FSSA8. The latent continuum sleepiness for which the scale and its items are reliable encompassed most of the clinical subjects. FSSA8 is weakly correlated with MSLT. Distribution of scores for the nonclinical group and the clinical group differed significantly; the FSSA8 had very good screening validity in sleep disorders. The cut-off was seven points. CONCLUSION The FSSA8 appeared to be more reliable for patients than for nonclinical participants and to be a good tool for screening excessive daytime sleepiness in sleep disorders.
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Affiliation(s)
- M-P Gustin
- Emerging Pathogens Laboratory-Fondation Mérieux, International Center for Infectiology Research (CIRI), Inserm U1111, CNRS UMR5308, ENS de Lyon, Lyon, France; Institute of Pharmaceutic and Biological Sciences, Public Health department, Biostatistics, University Claude-Bernard Lyon 1, Villeurbanne, France
| | - B Putois
- Faculty of Psychology, Swiss Distance Learning University, Brig 3900, Switzerland
| | - A Guyon
- Pediatric Sleep Unit, Hospital for Women Mothers & Children, Lyon 1 University, France; National Reference Centre for Orphan Diseases, Narcolepsy, Idiopathic hypersomnia and Kleine-Levin Syndrome (CNR narcolepsie-hypersomnie), France; Lyon Neuroscience Research Centre, CNRS UMR 5292-INSERM U1028-Lyon 1 University, Bron 69005, France
| | - M Lecendreux
- National Reference Centre for Orphan Diseases, Narcolepsy, Idiopathic hypersomnia and Kleine-Levin Syndrome (CNR narcolepsie-hypersomnie), France; Centre pédiatrique des pathologies du sommeil, Hôpital Robert Debré, Paris, France
| | - M-J Challamel
- Pediatric Sleep Unit, Hospital for Women Mothers & Children, Lyon 1 University, France
| | - S Plancoulaine
- Université de Paris Cité, Inserm, INRAE, CRESS, 75004 Paris, France
| | - S Bioulac-Rogier
- Service de Psychiatrie de l'enfant et l'adolescent, Hôpital Couple enfant, CHU Grenoble Alpes CHU CS 10217, 38046 Grenoble, France
| | - C Schroder
- University of Strasbourg; CNRS UPR 3212, Institute of Cellular and Integrative Neurosciences
| | | | - S Huguelet
- Faculty of Psychology, Swiss Distance Learning University, Brig 3900, Switzerland
| | - P Franco
- Pediatric Sleep Unit, Hospital for Women Mothers & Children, Lyon 1 University, France; National Reference Centre for Orphan Diseases, Narcolepsy, Idiopathic hypersomnia and Kleine-Levin Syndrome (CNR narcolepsie-hypersomnie), France; Lyon Neuroscience Research Centre, CNRS UMR 5292-INSERM U1028-Lyon 1 University, Bron 69005, France.
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Mangialardi ML, Honart JF, Qassemyar Q, Guyon A, Li SS, Benmoussa N, Beldarida V, Temam S, Kolb F. Reconstruction of Extensive Composite Parotid Region Oncologic Defects with Immediate Facial Nerve Reconstruction Using a Chimeric Scapulodorsal Vascularized Nerve Free Flap. J Reconstr Microsurg 2020; 37:282-291. [PMID: 33142333 DOI: 10.1055/s-0040-1719050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
BACKGROUND Cancer involving the parotid gland region may originates from parotid parenchyma itself or from locoregional organs and in rare cases, the facial nerve (FN) has to be sacrificed during tumor resection. In these cases, cancer extension often goes beyond the parotid compartment and requires extensive local resection responsible for complex multitissular defects. The goals of reconstruction may be summarized in the following two components: (1) restoration of the volumetric tissue defect and (2) FN reconstruction. The aim of this study is to describe our surgical technique and our cosmetic results using the chimeric scapulodorsal vascularized nerve (SDVN) flap to reconstruct extensive maxillofacial defects associated with FN sacrifice. METHODS All patients undergone an extensive maxillofacial resection with FN sacrifice and primarily reconstructed with a SDVN flap were included. We classified the maxillofacial defects into six groups based on the type of resection. Intraoperative data including flap composition, topography of FN injury, length of nerve gap, and number of nervous anastomosis were recorded. RESULTS Twenty-nine patients were included. Mean follow-up was 38.7 months. The harvested flaps included the SDVN combined with different components according to the defect group. A satisfactory volumetric restoration was obtained in 93% of cases. The mean number of distal nervous anastomosis was 4.5. The length of the vascularized grafted nerve ranged from 7 to 10 cm. CONCLUSION This is largest series presented in literature on primary FN reconstruction utilizing a vascularized nerve graft. We believe that the chimeric SDVN flap should be highly considered for these cases due to its versatility. The surgeon is able to use single donor site available soft and hard tissues components along with a vascular motor nerve graft, which offers a great length and number of distal branches, and easily matches with the extracranial FN trunk and its peripheral ramifications.
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Affiliation(s)
- Maria L Mangialardi
- Department of Plastic Surgery, Gustave Roussy Cancer Campus, Villejuif, France
| | - Jean-Fracois Honart
- Department of Plastic Surgery, Gustave Roussy Cancer Campus, Villejuif, France
| | - Quentin Qassemyar
- Faculty of Medicine, Sorbonne Université, Paris, France.,Department of Plastic, Reconstructive and Burn Surgery, Hopital Armand-Trousseau, Paris, France
| | - Alice Guyon
- Department of Plastic Surgery, Gustave Roussy Cancer Campus, Villejuif, France
| | - Sean S Li
- Department of Plastic Surgery, UCSD, San Diego, California
| | - Nadia Benmoussa
- Department of Head and Neck Surgery, Gustave Roussy Cancer Campus, Villejuif, France
| | - Vincent Beldarida
- Department of Head and Neck Surgery, Gustave Roussy Cancer Campus, Villejuif, France
| | - Stéphane Temam
- Department of Head and Neck Surgery, Gustave Roussy Cancer Campus, Villejuif, France
| | - Frédéric Kolb
- Department of Plastic Surgery, Gustave Roussy Cancer Campus, Villejuif, France.,Department of Plastic Surgery, UCSD, San Diego, California
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Abstract
Introduction: Odontogenic keratocysts (OKCs) are frequent, aggressive lesions with a strong tendency to recur, particularly in their para-keratinized majority form. Although they are mainly non-syndromic, these lesions are found in a large majority of patients with Gorlin syndrome. Thus, multiple forms are almost always associated with this syndrome and require investigation to prevent the risk of various cancers. Non-syndromic multiple forms are exceptional. Observation: A 20-year-old patient presented with dual localization of maxillary and left mandibular OKC at consultation. Under general anesthesia, excision of the lesions and extraction of the impacted wisdom teeth 28 and 38 were performed. The patient showed no clinical sign of Gorlin syndrome. Discussion: The OKC or epidermoid cyst is derived from the dental lamina or its remnants and from the basal part of the oral epithelium and represents between 10 and 20% of all cystic lesions in the maxillae. Its peak of incidence is between the second and fourth decade (or earlier in case of association with basal cell necrosis). OKC occurs mainly in the mandible and preferentially at the Ramus, where its frequency can reach 70% depending on the series. Conclusion: The management of OKC by oral surgeons must be conducted in a multidisciplinary setting in close collaboration with dermatologists, geneticists, and anatomic pathologists. Due to the strong recidivating character of OKCs, patient monitoring is essential.
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Roche J, Corgosinho F, Dâmaso A, Scheuermaier K, Isacco L, Miguet M, Fillon A, Guyon A, Moreira G, Pradella-Hallinan M, Tufik S, Túlio de Mello M, Gillet V, Pereira B, Duclos M, Boirie Y, Masurier J, Franco P, Thivel D, Mougin F. Sleep-disordered breathing in adolescents with obesity: when does it start to affect cardiometabolic health? Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.905] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Guyon A, Lessard R, Masse-Jolicoeur M, Tessier S. Healthy public policy competences for public health: interactive and practice-oriented curriculum. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz186.700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Developing and implementing healthy public policy (HPP) is one of the practical competences expected of public health professionals in Europe and beyond (ASPHER 2018, Public Health Agency of Canada 2015, US Public Health Foundation 2014). Yet, organizational practices in building public health capacity to promote HPP are seldom documented. In order to improve its HPP interventions, the Montreal Public Health Unit has been leading and evaluating a HPP multidisciplinary community of practice since 2014. In response to participants’ requests, we recently formalized a HPP curriculum.
Objectives
Over a period of 12 months in 2018-2019, our objectives were to: (1) develop and pre-test a competency-based professional development curriculum in HPP for public health staff and interns (2) provide a repository of relevant references (3) identify dynamic pedagogical strategies applicable to a community of practice.
Results
As community of practice members and facilitators, we developed a HPP curriculum with the support of pedagogical and HPP experts. It was pre-tested and iteratively adjusted with members of the community of practice. We drew content from various disciplines including political sciences, public health, communication studies and public relations. We identified relevant: (1) competences; (2) core concepts; (3) practical skills; (4) key references; (5) practical case studies, (6) interactive pedagogical strategies such as an open-source online learning system.
Conclusions
We developed an innovative healthy public policy (HPP) curriculum in order to support an existing community of practice among public health staff. Dynamic pedagogical strategies and a more formal HPP curriculum can support competence development among public health staff, and this can be achieved while relying mostly on in-house expertise. This constitutes a stimulating capacity-building initiative for the enhancement of public health core competences.
Key messages
Developing healthy public policy is a core practical competence expected of public health professionals. Yet, organizational practices in building healthy public policy capacity are seldom documented. Developing dynamic pedagogical strategies and a more formal healthy public policy curriculum can support competence development among public health staff, while relying mostly on in-house expertise.
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Affiliation(s)
- A Guyon
- Direction de Santé Publique de Montréal, Montreal, Canada
- Département de Médecine Sociale et Préventive, École de Santé Publique de l’Université de Montréal, Montreal, Canada
| | - R Lessard
- Direction de Santé Publique de Montréal, Montreal, Canada
- Département de Médecine Sociale et Préventive, École de Santé Publique de l’Université de Montréal, Montreal, Canada
| | | | - S Tessier
- Direction de Santé Publique de Montréal, Montreal, Canada
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Bouchet J, Hervé G, Lescaille G, Descroix V, Guyon A. Palatal torus: etiology, clinical aspect, and therapeutic strategy. J Oral Med Oral Surg 2019. [DOI: 10.1051/mbcb/2018040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Introduction: Maxillary palatal tori are benign bone tumors that elevate the median of the palate. Although there are clinical variations, palatal tori are characterized by pathognomonic clinical and radiographic criteria. Observations: Here, we present the cases of two patients with a voluminous palatal torus that caused functional problems in one and formed an anatomical obstacle to the fitting of a removable prosthetic in the other. Given their size, these tori were surgically removed under general anesthesia. The postoperative course was simple. Discussion: The etiology of palatal torus is usually multifactorial: genetic factors, masticatory forces, and para-functions could all be factors in their development and growth. Considered as anatomical variations, palatal tori are asymptomatic in most cases and require no intervention. Conclusion: Surgical management is sometimes necessary to restore physiological orofacial functions or to allow the fitting of a prosthetic without harmful compromise.
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Mondoloni M, Guyon A, Descroix V, Lescaille G. [Immune thrombocytopenic purpura]. Rev Prat 2019; 69:290. [PMID: 30983256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- Marine Mondoloni
- Service d'odontologie, Groupe hospitalier La Pitié-Salpêtrière, Paris, France
| | - Alice Guyon
- Service d'odontologie, Groupe hospitalier La Pitié-Salpêtrière, Paris, France
| | - Vianney Descroix
- Service d'odontologie, Groupe hospitalier La Pitié-Salpêtrière, Paris, France
| | - Géraldine Lescaille
- Service d'odontologie, Groupe hospitalier La Pitié-Salpêtrière, Paris, France
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Coutier L, Guyon A, Reix P, Franco P. Impact of prone positioning in infants with Pierre Robin sequence: a polysomnography study. Sleep Med 2019; 54:257-261. [DOI: 10.1016/j.sleep.2018.10.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 10/12/2018] [Accepted: 10/13/2018] [Indexed: 10/27/2022]
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Zarif H, Paquet A, Lebrigand K, Arguel MJ, Heurteaux C, Glaichenhaus N, Chabry J, Guyon A, Petit-Paitel A. CD4+ T Cells Affect the Thyroid Hormone Transport at the Choroid Plexus in Mice Raised in Enriched Environment. Neuroimmunomodulation 2019; 26:59-66. [PMID: 30703773 DOI: 10.1159/000495987] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 12/04/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Others and we have shown that T cells have an important role in hippocampal synaptic plasticity, including neurogenesis in the dentate gyrus, spinogenesis, and glutamatergic synaptic function in the CA of the hippocampus. Hippocampus plasticity is particularly involved in the brain effects of the enriched environment (EE), and interestingly CD4+ and CD8+ T cells play essential and differential roles in these effects. However, the precise mechanisms by which they act on the brain remain elusive. OBJECTIVES We searched for a putative mechanism of action by which CD4+ T cells could influence brain plasticity and hypothesized that they could regulate protein transport at the level of the blood-CSF barrier in the choroid plexus. METHOD We compared mice housed in EE and deprived of CD4+ T cells using a depleting antibody with a control group injected with the control isotype. We analyzed in the hippocampus the gene expression profiles using the Agilent system, and the expression of target proteins in plasma, CSF, and the choroid plexus using ELISA. RESULTS We show that CD4+ T cells may influence EE-induced hippocampus plasticity via thyroid hormone signaling by regulating in the choroid plexus the expression of transthyretin, the major transporter of thyroxine (T4) to the brain parenchyma. CONCLUSIONS Our study highlights the contribution of close interactions between the immune and neuroendocrine systems in brain plasticity and function.
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Affiliation(s)
- Hadi Zarif
- Université Côte d'Azur, CNRS, IPMC, Valbonne, France
| | - Agnès Paquet
- Université Côte d'Azur, CNRS, IPMC, Valbonne, France
| | | | | | | | | | - Joëlle Chabry
- Université Côte d'Azur, INSERM, CNRS, IPMC, Valbonne, France
| | - Alice Guyon
- Université Côte d'Azur, CNRS, IPMC, Valbonne, France,
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Gaudinat M, Samama M, Guyon A, Razouk O, Goudot P. Unicystic ameloblastoma mimicking a dentigerous cyst: short case report. J Oral Med Oral Surg 2018. [DOI: 10.1051/mbcb/2018011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Observation: This case reports an unusual morphology and localisation of ameloblastoma that imitates a dentigerous cyst on an inclused mandibular canine. Comments: Ameloblastoma is a local odontogenic benign tumour which often relapse. It is usually described in its polycystic form in the posterior mandibular part.
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Nicolas S, Debayle D, Béchade C, Maroteaux L, Gay AS, Bayer P, Heurteaux C, Guyon A, Chabry J. Adiporon, an adiponectin receptor agonist acts as an antidepressant and metabolic regulator in a mouse model of depression. Transl Psychiatry 2018; 8:159. [PMID: 30115912 PMCID: PMC6095913 DOI: 10.1038/s41398-018-0210-y] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/11/2018] [Accepted: 05/11/2018] [Indexed: 01/16/2023] Open
Abstract
Major depression is a psychiatric disorder with complex etiology. About 30% of depressive patients are resistant to antidepressants that are currently available, likely because they only target the monoaminergic systems. Thus, identification of novel antidepressants with a larger action spectrum is urgently required. Epidemiological data indicate high comorbidity between metabolic and psychiatric disorders, particularly obesity and depression. We used a well-characterized anxiety/depressive-like mouse model consisting of continuous input of corticosterone for seven consecutive weeks. A panel of reliable behavioral tests were conducted to assessing numerous facets of the depression-like state, including anxiety, resignation, reduced motivation, loss of pleasure, and social withdrawal. Furthermore, metabolic features including weight, adiposity, and plasma biological parameters (lipids, adipokines, and cytokines) were investigated in corticosterone-treated mice. Our data show that chronic administration of corticosterone induced the parallel onset of metabolic and behavioral dysfunctions in mice. AdipoRon, a potent adiponectin receptor agonist, prevented the corticosterone-induced early onset of moderate obesity and metabolic syndromes. Moreover, in all the behavioral tests, daily treatment with AdipoRon successfully reversed the corticosterone-induced depression-like state in mice. AdipoRon exerted its pleiotropic actions on various systems including hippocampal neurogenesis, serotonergic neurotransmission, neuroinflammation, and the tryptophan metabolic pathway, which can explain its antidepressant properties. Our study highlights the pivotal role of the adiponergic system in the development of both metabolic and psychiatric disorders. AdipoRon may constitute a promising novel antidepressant.
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Affiliation(s)
- Sarah Nicolas
- 0000 0004 0638 0649grid.429194.3Université Côte d’Azur, Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275 CNRS, 660 Route des lucioles, Sophia Antipolis 06560 Valbonne, France
| | - Delphine Debayle
- Physicochemical Characterization of Biomolecules CAPABIO platform, UMR 7275 CNRS, 660 Route des lucioles, Sophia Antipolis 06560 Valbonne, France
| | - Catherine Béchade
- 0000 0001 1955 3500grid.5805.8Institut du Fer à Moulin UMR-S U839 Inserm, Université Pierre & Marie Curie, 17 Rue du Fer à Moulin, 75005 Paris, France
| | - Luc Maroteaux
- 0000 0001 1955 3500grid.5805.8Institut du Fer à Moulin UMR-S U839 Inserm, Université Pierre & Marie Curie, 17 Rue du Fer à Moulin, 75005 Paris, France
| | - Anne-Sophie Gay
- Physicochemical Characterization of Biomolecules CAPABIO platform, UMR 7275 CNRS, 660 Route des lucioles, Sophia Antipolis 06560 Valbonne, France
| | - Pascale Bayer
- Centre Hospitalier Universitaire de Nice, Hôpital Pasteur, Service de Biochimie, 30 Voie Romaine, 06000 Nice, France
| | - Catherine Heurteaux
- 0000 0004 0638 0649grid.429194.3Université Côte d’Azur, Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275 CNRS, 660 Route des lucioles, Sophia Antipolis 06560 Valbonne, France
| | - Alice Guyon
- 0000 0004 0638 0649grid.429194.3Université Côte d’Azur, Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275 CNRS, 660 Route des lucioles, Sophia Antipolis 06560 Valbonne, France
| | - Joëlle Chabry
- Université Côte d'Azur, Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275 CNRS, 660 Route des lucioles, Sophia Antipolis, 06560, Valbonne, France.
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15
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Nicolas S, Chabry J, Guyon A, Zarif H, Heurteaux C, Petit-Paitel A. [Adiponectin: an endogenous molecule with anti-inflammatory and antidepressant properties?]. Med Sci (Paris) 2018; 34:417-423. [PMID: 29900844 DOI: 10.1051/medsci/20183405014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Adiponectin (ApN) is a hormone produced by adipose tissue, yet the plasma level of ApN is decreased in overweight and obese people, as well as in people with diabetes. In the periphery, this decrease in circulating levels of ApN induces the establishment of a chronic low-grade inflammatory state and is involved in the development of insulin resistance and atheromas. Conversely, "favorable" living conditions, weight loss and regular physical exercise increase ApN blood concentration. Some forms of ApN can reach the brain parenchyma through the cerebrospinal fluid. In the brain, the increase in ApN exerts powerful antidepressant and anxiolytic effects, in particular by fighting against neuroinflammation.
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Affiliation(s)
- Sarah Nicolas
- Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660, route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Joëlle Chabry
- Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660, route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Alice Guyon
- Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660, route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Hadi Zarif
- Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660, route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Catherine Heurteaux
- Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660, route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
| | - Agnès Petit-Paitel
- Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660, route des Lucioles, Sophia Antipolis, 06560 Valbonne, France
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16
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Zarif H, Hosseiny S, Paquet A, Lebrigand K, Arguel MJ, Cazareth J, Lazzari A, Heurteaux C, Glaichenhaus N, Chabry J, Guyon A, Petit-Paitel A. CD4 + T Cells Have a Permissive Effect on Enriched Environment-Induced Hippocampus Synaptic Plasticity. Front Synaptic Neurosci 2018; 10:14. [PMID: 29950983 PMCID: PMC6008389 DOI: 10.3389/fnsyn.2018.00014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 05/22/2018] [Indexed: 12/17/2022] Open
Abstract
Living in an enriched environment (EE) benefits health by acting synergistically on various biological systems including the immune and the central nervous systems. The dialog between the brain and the immune cells has recently gained interest and is thought to play a pivotal role in beneficial effects of EE. Recent studies show that T lymphocytes have an important role in hippocampal plasticity, learning, and memory, although the precise mechanisms by which they act on the brain remain elusive. Using a mouse model of EE, we show here that CD4+ T cells are essential for spinogenesis and glutamatergic synaptic function in the CA of the hippocampus. However, CD4+ lymphocytes do not influence EE-induced neurogenesis in the DG of the hippocampus, by contrast to what we previously demonstrated for CD8+ T cells. Importantly, CD4+ T cells located in the choroid plexus have a specific transcriptomic signature as a function of the living environment. Our study highlights the contribution of CD4+ T cells in the brain plasticity and function.
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Affiliation(s)
- Hadi Zarif
- Université Côte d'Azur, CNRS, IPMC, Nice, France
| | | | - Agnès Paquet
- Université Côte d'Azur, CNRS, IPMC, Nice, France
| | | | | | | | - Anne Lazzari
- Université Côte d'Azur, INSERM, IPMC, Nice, France
| | | | | | - Joëlle Chabry
- Université Côte d'Azur, INSERM, C3M, IPMC, Nice, France
| | - Alice Guyon
- Université Côte d'Azur, CNRS, IPMC, Nice, France
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17
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Zarif H, Nicolas S, Guyot M, Hosseiny S, Lazzari A, Canali MM, Cazareth J, Brau F, Golzné V, Dourneau E, Maillaut M, Luci C, Paquet A, Lebrigand K, Arguel MJ, Daoudlarian D, Heurteaux C, Glaichenhaus N, Chabry J, Guyon A, Petit-Paitel A. CD8 + T cells are essential for the effects of enriched environment on hippocampus-dependent behavior, hippocampal neurogenesis and synaptic plasticity. Brain Behav Immun 2018; 69:235-254. [PMID: 29175168 DOI: 10.1016/j.bbi.2017.11.016] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 11/13/2017] [Accepted: 11/20/2017] [Indexed: 12/21/2022] Open
Abstract
Enriched environment (EE) induces plasticity changes in the brain. Recently, CD4+ T cells have been shown to be involved in brain plasticity processes. Here, we show that CD8+ T cells are required for EE-induced brain plasticity in mice, as revealed by measurements of hippocampal volume, neurogenesis in the DG of the hippocampus, spinogenesis and glutamatergic synaptic function in the CA of the hippocampus. As a consequence, EE-induced behavioral benefits depend, at least in part, on CD8+ T cells. In addition, we show that spleen CD8+ T cells from mice housed in standard environment (SE) and EE have different properties in terms of 1) TNFα release after in vitro CD3/CD28 or PMA/Iono stimulation 2) in vitro proliferation properties 3) CD8+ CD44+ CD62Llow and CD62Lhi T cells repartition 4) transcriptomic signature as revealed by RNA sequencing. CD8+ T cells purified from the choroid plexus of SE and EE mice also exhibit different transcriptomic profiles as highlighted by single-cell mRNA sequencing. We show that CD8+ T cells are essential mediators of beneficial EE effects on brain plasticity and cognition. Additionally, we propose that EE differentially primes CD8+ T cells leading to behavioral improvement.
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Affiliation(s)
- Hadi Zarif
- Université Côte d'Azur, CNRS, IPMC, France
| | | | | | | | - Anne Lazzari
- Université Côte d'Azur, INSERM, CNRS, IPMC, France
| | | | | | | | | | | | | | - Carmelo Luci
- Université Côte d'Azur, C3M, INSERM U 1065, France
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18
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Nicolas S, Cazareth J, Zarif H, Guyon A, Heurteaux C, Chabry J, Petit-Paitel A. Globular Adiponectin Limits Microglia Pro-Inflammatory Phenotype through an AdipoR1/NF-κB Signaling Pathway. Front Cell Neurosci 2017; 11:352. [PMID: 29184485 PMCID: PMC5694456 DOI: 10.3389/fncel.2017.00352] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 10/24/2017] [Indexed: 12/14/2022] Open
Abstract
We recently reported that increased levels of Adiponectin (ApN) in the brain led to microglia phenotype and activation state regulation, thus reducing both global brain inflammation and depressive-like behaviors in mice. Apart from this, little is known on ApN molecular effects on microglia, although these cells are crucial in both physiological and pathological processes. Here we fill this gap by studying the effects and targets of ApN toward neuroinflammation. Our findings suggest that ApN deficiency in mice leads to a higher sensitivity of mice to neuroinflammation that is due to enhanced microglia responsiveness to a pro-inflammatory challenge. Moreover, we show that globular ApN (gApN) exerts direct in vivo anti-inflammatory actions on microglia by reducing IL-1β, IL-6, and TNFα synthesis. In vitro, gApN anti-inflammatory properties are confirmed in brain-sorted microglia, primary cultured and microglia cell line (BV2), but are not observed on astrocytes. Our results also show that gApN blocks LPS-induced nitrosative and oxidative stress in microglia. Finally, we demonstrate for the first time that these anti-inflammatory and anti-oxidant actions of gApN on microglia are mediated through an AdipoR1/NF-κB signaling pathway.
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Affiliation(s)
- Sarah Nicolas
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Julie Cazareth
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Hadi Zarif
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Alice Guyon
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Catherine Heurteaux
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Joëlle Chabry
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Agnès Petit-Paitel
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
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19
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Guyon A, Inocente C, Villanueva C, Lin J, Franco P. 0953 PREVALENCE OF METABOLIC SYNDROME AND LIVER STEATOSIS IN CHILDREN WITH IDIOPATHIC NARCOLEPSY. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.952] [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: 11/14/2022] Open
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20
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Taelman G, Guyon A, Corchia A, Samama M, Roche Y. [Not Available]. Rev Prat 2016; 66:981. [PMID: 30512365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
| | - Alice Guyon
- Service de chirurgie orale, hôpital Rothschild, Paris, France
| | | | - Mickael Samama
- Service de chirurgie orale, hôpital Rothschild, Paris, France
| | - Yvon Roche
- Service de chirurgie orale, hôpital Rothschild, Paris, France
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21
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Le Thuc O, Cansell C, Bourourou M, Denis RG, Stobbe K, Devaux N, Guyon A, Cazareth J, Heurteaux C, Rostène W, Luquet S, Blondeau N, Nahon JL, Rovère C. Central CCL2 signaling onto MCH neurons mediates metabolic and behavioral adaptation to inflammation. EMBO Rep 2016; 17:1738-1752. [PMID: 27733491 DOI: 10.15252/embr.201541499] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 08/25/2016] [Accepted: 08/30/2016] [Indexed: 12/30/2022] Open
Abstract
Sickness behavior defines the endocrine, autonomic, behavioral, and metabolic responses associated with infection. While inflammatory responses were suggested to be instrumental in the loss of appetite and body weight, the molecular underpinning remains unknown. Here, we show that systemic or central lipopolysaccharide (LPS) injection results in specific hypothalamic changes characterized by a precocious increase in the chemokine ligand 2 (CCL2) followed by an increase in pro-inflammatory cytokines and a decrease in the orexigenic neuropeptide melanin-concentrating hormone (MCH). We therefore hypothesized that CCL2 could be the central relay for the loss in body weight induced by the inflammatory signal LPS. We find that central delivery of CCL2 promotes neuroinflammation and the decrease in MCH and body weight. MCH neurons express CCL2 receptor and respond to CCL2 by decreasing both electrical activity and MCH release. Pharmacological or genetic inhibition of CCL2 signaling opposes the response to LPS at both molecular and physiologic levels. We conclude that CCL2 signaling onto MCH neurons represents a core mechanism that relays peripheral inflammation to sickness behavior.
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Affiliation(s)
- Ophélia Le Thuc
- Université Côte d'Azur, Nice, France.,CNRS, IPMC, Sophia Antipolis, France
| | - Céline Cansell
- Université Côte d'Azur, Nice, France.,CNRS, IPMC, Sophia Antipolis, France
| | - Miled Bourourou
- Université Côte d'Azur, Nice, France.,CNRS, IPMC, Sophia Antipolis, France
| | - Raphaël Gp Denis
- Univ Paris Diderot Sorbonne Paris Cité Unité de Biologie Fonctionnelle et Adaptative CNRS UMR 8251, Paris, France
| | - Katharina Stobbe
- Université Côte d'Azur, Nice, France.,CNRS, IPMC, Sophia Antipolis, France
| | - Nadège Devaux
- Université Côte d'Azur, Nice, France.,CNRS, IPMC, Sophia Antipolis, France
| | - Alice Guyon
- Université Côte d'Azur, Nice, France.,CNRS, IPMC, Sophia Antipolis, France
| | - Julie Cazareth
- Université Côte d'Azur, Nice, France.,CNRS, IPMC, Sophia Antipolis, France
| | | | - William Rostène
- Institut de la Vision UMRS 968-Université Pierre et Marie Curie, Paris, France
| | - Serge Luquet
- Univ Paris Diderot Sorbonne Paris Cité Unité de Biologie Fonctionnelle et Adaptative CNRS UMR 8251, Paris, France
| | - Nicolas Blondeau
- Université Côte d'Azur, Nice, France.,CNRS, IPMC, Sophia Antipolis, France
| | - Jean-Louis Nahon
- Université Côte d'Azur, Nice, France .,CNRS, IPMC, Sophia Antipolis, France.,Station de Primatologie UPS846 CNRS, Rousset-sur-Arc, France
| | - Carole Rovère
- Université Côte d'Azur, Nice, France .,CNRS, IPMC, Sophia Antipolis, France
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22
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Zarif H, Petit-Paitel A, Heurteaux C, Chabry J, Guyon A. TRH modulates glutamatergic synaptic inputs on CA1 neurons of the mouse hippocampus in a biphasic manner. Neuropharmacology 2016; 110:69-81. [PMID: 27060411 DOI: 10.1016/j.neuropharm.2016.04.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 03/08/2016] [Accepted: 04/05/2016] [Indexed: 11/26/2022]
Abstract
Thyrotropin Releasing Hormone (TRH) is a tripeptide that induces the release of Thyroid Stimulating Hormone (TSH) in the blood. Besides its role in the thyroid system, TRH has been shown to regulate several neuronal systems in the brain however its role in hippocampus remains controversial. Using electrophysiological recordings in acute mouse brain slices, we show that TRH depresses glutamate responses at the CA3-CA1 synapse through an action on NMDA receptors, which, as a consequence, decreases the ability of the synapse to establish a long term potentiation (LTP). TRH also induces a late increase in AMPA/kainate responses. Together, these results suggest that TRH plays an important role in the modulation of hippocampal neuronal activities, and they contribute to a better understanding of the mechanisms by which TRH impacts synaptic function underlying emotional states, learning and memory processes.
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Affiliation(s)
- Hadi Zarif
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS, Université de Nice-Sophia Antipolis, F-06560, Valbonne, France
| | - Agnès Petit-Paitel
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS, Université de Nice-Sophia Antipolis, F-06560, Valbonne, France
| | - Catherine Heurteaux
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS, Université de Nice-Sophia Antipolis, F-06560, Valbonne, France
| | - Joëlle Chabry
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS, Université de Nice-Sophia Antipolis, F-06560, Valbonne, France
| | - Alice Guyon
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, CNRS, Université de Nice-Sophia Antipolis, F-06560, Valbonne, France.
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23
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Berlin S, Szobota S, Reiner A, Carroll EC, Kienzler MA, Guyon A, Xiao T, Trauner D, Isacoff EY. A family of photoswitchable NMDA receptors. eLife 2016; 5. [PMID: 26929991 PMCID: PMC4786437 DOI: 10.7554/elife.12040] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 01/31/2016] [Indexed: 02/07/2023] Open
Abstract
NMDA receptors, which regulate synaptic strength and are implicated in learning and memory, consist of several subtypes with distinct subunit compositions and functional properties. To enable spatiotemporally defined, rapid and reproducible manipulation of function of specific subtypes, we engineered a set of photoswitchable GluN subunits ('LiGluNs'). Photo-agonism of GluN2A or GluN2B elicits an excitatory drive to hippocampal neurons that can be shaped in time to mimic synaptic activation. Photo-agonism of GluN2A at single dendritic spines evokes spine-specific calcium elevation and expansion, the morphological correlate of LTP. Photo-antagonism of GluN2A alone, or in combination with photo-antagonism of GluN1a, reversibly blocks excitatory synaptic currents, prevents the induction of long-term potentiation and prevents spine expansion. In addition, photo-antagonism in vivo disrupts synaptic pruning of developing retino-tectal projections in larval zebrafish. By providing precise and rapidly reversible optical control of NMDA receptor subtypes, LiGluNs should help unravel the contribution of specific NMDA receptors to synaptic transmission, integration and plasticity.
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Affiliation(s)
- Shai Berlin
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Stephanie Szobota
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Andreas Reiner
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Elizabeth C Carroll
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Michael A Kienzler
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Alice Guyon
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States.,Institut de Pharmacologie Moléculaire et Cellulaire, Université de Nice Sophia Antipolis, Nice, France
| | - Tong Xiao
- Department of Chemistry, University of California, Berkeley, Berkeley, United States
| | - Dirk Trauner
- Department of Chemistry, Center of Integrated Protein Science, University of Munich, Munich, Germany
| | - Ehud Y Isacoff
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States.,Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, United States.,Physical Bioscience Division, Lawrence Berkeley National Laboratory, Berkeley, United States
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24
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Guyon A, Bosc R, Lange F, Ortonne N, Plantier F, Chosidow O, Wolkenstein P, Hersant B, Meningaud JP. Retrospective Outcome Analysis of 39 Patients Who Underwent Lip Surgery for Cutaneous Carcinoma. J Maxillofac Oral Surg 2016; 15:478-483. [PMID: 27833340 DOI: 10.1007/s12663-015-0878-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 12/12/2015] [Indexed: 10/22/2022] Open
Abstract
PURPOSE The treatment of lip carcinomas needs tumor surgical resection with safety margins respect. The aim of this study was to report the oncologic and aesthetic/functional outcomes of a retrospective monocentric case series of 39 patients treated for cutaneous lip cancer. METHODS This retrospective study assessed 56 patients who were treated for a lip carcinoma between 2008 and 2012 and included 39 patients with cutaneous lip basal cell carcinoma or squamous cell carcinoma. Clinical, surgical and pathological data were reviewed, and patients were interviewed for follow-up data. A comparison was made between the marked surgical margins and the margins observed under microscopy after histologic process. RESULTS The most frequent tumor type was basal cell carcinoma in 69.2 %. The measured surgical margins were superior to the histological margins in 24 cases (61.5 %) and were inferior in 13 cases (33.3 %). Overall survival and recurrence-free survival rates at 1 year were 97.5 and 95 % respectively. CONCLUSION Differences between the surgical margins and the final histologic margins were the main finding of this retrospective study. These differences were attributed to surgical practices and modification during the histological process. Nevertheless, we did not observe a higher rate of recurrence or death in our study than in literature.
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Affiliation(s)
- Alice Guyon
- Department of Plastic, Reconstructive and Aesthetic Surgery, Henri Mondor Hospital, 51, avenue du Maréchal de Lattre de Tassigny, 94000 Créteil, France ; UPEC, University Paris Est Creteil, Val de Marne, France
| | - Romain Bosc
- Department of Plastic, Reconstructive and Aesthetic Surgery, Henri Mondor Hospital, 51, avenue du Maréchal de Lattre de Tassigny, 94000 Créteil, France ; UPEC, University Paris Est Creteil, Val de Marne, France
| | - Frederic Lange
- Department of Plastic, Reconstructive and Aesthetic Surgery, Henri Mondor Hospital, 51, avenue du Maréchal de Lattre de Tassigny, 94000 Créteil, France ; UPEC, University Paris Est Creteil, Val de Marne, France
| | - Nicolas Ortonne
- UPEC, University Paris Est Creteil, Val de Marne, France ; Department of Pathology, Henri Mondor Hospital, Créteil, France
| | - Françoise Plantier
- Department of Pathology, Intercity Hospital of Creteil, Val de Marne, France
| | - Olivier Chosidow
- Department of Plastic, Reconstructive and Aesthetic Surgery, Henri Mondor Hospital, 51, avenue du Maréchal de Lattre de Tassigny, 94000 Créteil, France ; Department of Dermatology, Créteil, France ; French Satellite of the Cochrane Skin Group, Créteil, France ; Centre d'investigation Clinique Inserm 006 and EA 439, Créteil, France
| | - Pierre Wolkenstein
- Department of Plastic, Reconstructive and Aesthetic Surgery, Henri Mondor Hospital, 51, avenue du Maréchal de Lattre de Tassigny, 94000 Créteil, France ; Department of Dermatology, Créteil, France ; French Satellite of the Cochrane Skin Group, Créteil, France ; Centre d'investigation Clinique Inserm 006 and EA 439, Créteil, France
| | - Barbara Hersant
- Department of Plastic, Reconstructive and Aesthetic Surgery, Henri Mondor Hospital, 51, avenue du Maréchal de Lattre de Tassigny, 94000 Créteil, France ; UPEC, University Paris Est Creteil, Val de Marne, France
| | - Jean-Paul Meningaud
- Department of Plastic, Reconstructive and Aesthetic Surgery, Henri Mondor Hospital, 51, avenue du Maréchal de Lattre de Tassigny, 94000 Créteil, France ; UPEC, University Paris Est Creteil, Val de Marne, France
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25
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Chabry J, Nicolas S, Cazareth J, Murris E, Guyon A, Glaichenhaus N, Heurteaux C, Petit-Paitel A. Enriched environment decreases microglia and brain macrophages inflammatory phenotypes through adiponectin-dependent mechanisms: Relevance to depressive-like behavior. Brain Behav Immun 2015. [PMID: 26209808 DOI: 10.1016/j.bbi.2015.07.018] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Regulation of neuroinflammation by glial cells plays a major role in the pathophysiology of major depression. While astrocyte involvement has been well described, the role of microglia is still elusive. Recently, we have shown that Adiponectin (ApN) plays a crucial role in the anxiolytic/antidepressant neurogenesis-independent effects of enriched environment (EE) in mice; however its mechanisms of action within the brain remain unknown. Here, we show that in a murine model of depression induced by chronic corticosterone administration, the hippocampus and the hypothalamus display increased levels of inflammatory cytokines mRNA, which is reversed by EE housing. By combining flow cytometry, cell sorting and q-PCR, we show that microglia from depressive-like mice adopt a pro-inflammatory phenotype characterized by higher expression levels of IL-1β, IL-6, TNF-α and IκB-α mRNAs. EE housing blocks pro-inflammatory cytokine gene induction and promotes arginase 1 mRNA expression in brain-sorted microglia, indicating that EE favors an anti-inflammatory activation state. We show that microglia and brain-macrophages from corticosterone-treated mice adopt differential expression profiles for CCR2, MHC class II and IL-4recα surface markers depending on whether the mice are kept in standard environment or EE. Interestingly, the effects of EE were abolished when cells are isolated from ApN knock-out mouse brains. When injected intra-cerebroventricularly, ApN, whose level is specifically increased in cerebrospinal fluid of depressive mice raised in EE, rescues microglia phenotype, reduces pro-inflammatory cytokine production by microglia and blocks depressive-like behavior in corticosterone-treated mice. Our data suggest that EE-induced ApN increase within the brain regulates microglia and brain macrophages phenotype and activation state, thus reducing neuroinflammation and depressive-like behaviors in mice.
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Affiliation(s)
- Joëlle Chabry
- Université de Nice Sophia Antipolis, 06103 Nice, France; Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, 06560 Valbonne, France
| | - Sarah Nicolas
- Université de Nice Sophia Antipolis, 06103 Nice, France; Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, 06560 Valbonne, France
| | - Julie Cazareth
- Université de Nice Sophia Antipolis, 06103 Nice, France; Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, 06560 Valbonne, France
| | - Emilie Murris
- Université de Nice Sophia Antipolis, 06103 Nice, France; Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, 06560 Valbonne, France
| | - Alice Guyon
- Université de Nice Sophia Antipolis, 06103 Nice, France; Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, 06560 Valbonne, France
| | - Nicolas Glaichenhaus
- Université de Nice Sophia Antipolis, 06103 Nice, France; Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, 06560 Valbonne, France
| | - Catherine Heurteaux
- Université de Nice Sophia Antipolis, 06103 Nice, France; Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, 06560 Valbonne, France
| | - Agnès Petit-Paitel
- Université de Nice Sophia Antipolis, 06103 Nice, France; Centre National de la Recherche Scientifique (CNRS), Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, 06560 Valbonne, France.
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Ginhoux T, Kassaï B, Cochat P, Di Filippo S, Rossi M, Guyon A, Serusclat A, Bertholet-Thomas A. P-261 – Efficacité du minoxidil chez les enfants williams et beuren. Arch Pediatr 2015. [DOI: 10.1016/s0929-693x(15)30441-3] [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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Guyon A, Samama M, Milliez S, Dridi SM, Gaultier F. [Pyogenic granuloma]. Rev Prat 2015; 65:471. [PMID: 26058182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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Samama M, Guyon A, Millez S, Myriam Dridi S, Gaultier F. [Abcès migrateur de Chompret-L'Hirondel abscess]. Rev Prat 2014; 64:1047. [PMID: 25510120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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Guyon A, Balbo M, Morselli LL, Tasali E, Leproult R, L'Hermite-Balériaux M, Van Cauter E, Spiegel K. Adverse effects of two nights of sleep restriction on the hypothalamic-pituitary-adrenal axis in healthy men. J Clin Endocrinol Metab 2014; 99:2861-8. [PMID: 24823456 PMCID: PMC4121029 DOI: 10.1210/jc.2013-4254] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Insufficient sleep is associated with increased cardiometabolic risk. Alterations in hypothalamic-pituitary-adrenal axis may underlie this link. OBJECTIVE Our objective was to examine the impact of restricted sleep on daytime profiles of ACTH and cortisol concentrations. METHODS Thirteen subjects participated in 2 laboratory sessions (2 nights of 10 hours in bed versus 2 nights of 4 hours in bed) in a randomized crossover design. Sleep was polygraphically recorded. After the second night of each session, blood was sampled at 20-minute intervals from 9:00 am to midnight to measure ACTH and total cortisol. Saliva was collected every 20 minutes from 2:00 pm to midnight to measure free cortisol. Perceived stress, hunger, and appetite were assessed at hourly intervals by validated scales. RESULTS Sleep restriction was associated with a 19% increase in overall ACTH levels (P < .03) that was correlated with the individual amount of sleep loss (rSp = 0.63, P < .02). Overall total cortisol levels were also elevated (+21%; P = .10). Pulse frequency was unchanged for both ACTH and cortisol. Morning levels of ACTH were higher after sleep restriction (P < .04) without concomitant elevation of cortisol. In contrast, evening ACTH levels were unchanged while total and free cortisol increased by, respectively, 30% (P < .03) and 200% (P < .04). Thus, the amplitude of the circadian cortisol decline was dampened by sleep restriction (-21%; P < .05). Sleep restriction was not associated with higher perceived stress but resulted in an increase in appetite that was correlated with the increase in total cortisol. CONCLUSION The impact of sleep loss on hypothalamic-pituitary-adrenal activity is dependent on time of day. Insufficient sleep dampens the circadian rhythm of cortisol, a major internal synchronizer of central and peripheral clocks.
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Affiliation(s)
- A Guyon
- Université Claude Bernard Lyon 1 Unité Mixte de Recherche 1028 (A.G., K.S.), Integrated Physiology and Physiology of Brain Arousal Systems, 69008 Lyon, France; Endocrinologia e Malattie Metaboliche (M.B.), Azienda Sanitaria Ospedaliera Santi Antonio e Biagio e Cesare Arrigo, Alessandria, 15100 Italy; Sleep, Metabolism, and Health Center (L.L.M., E.T., R.L., E.V.C.), Department of Medicine, University of Chicago, Chicago, Illinois 60637; Neuropsychology and Functional Neuroimaging Research Unit at the Center for Research in Cognition and Neurosciences and the ULB Neuroscience Institute (R.L.), Université Libre de Bruxelles, Brussels, 1050 Belgium and Faculté de Médecine (M.L.-B.), Université Libre de Bruxelles, Brussels, 1070 Belgium
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Cazareth J, Guyon A, Heurteaux C, Chabry J, Petit-Paitel A. Molecular and cellular neuroinflammatory status of mouse brain after systemic lipopolysaccharide challenge: importance of CCR2/CCL2 signaling. J Neuroinflammation 2014; 11:132. [PMID: 25065370 PMCID: PMC4237883 DOI: 10.1186/1742-2094-11-132] [Citation(s) in RCA: 145] [Impact Index Per Article: 14.5] [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: 02/13/2014] [Accepted: 07/15/2014] [Indexed: 12/13/2022] Open
Abstract
Background Genetic and environmental factors are critical elements influencing the etiology of major depression. It is now accepted that neuroinflammatory processes play a major role in neuropsychological disorders. Neuroinflammation results from the dysregulation of the synthesis and/or release of pro- and anti-inflammatory cytokines with central or peripheral origin after various insults. Systemic bacterial lipopolysaccharide (LPS) challenge is commonly used to study inflammation-induced depressive-like behaviors in rodents. In the present study, we investigated immune-to-brain communication in mice by examining the effects of peripheral LPS injection on neuroinflammation encompassing cytokine and chemokine production, microglia and central nervous system (CNS)-associated phagocyte activation, immune cell infiltration and serotonergic neuronal function. Methods LPS was administered to C57BL/6 J mice by intraperitoneal injection; brains were collected and pro-inflammatory cytokine mRNA and proteins were measured. To examine the relative contribution of the different populations of brain immune cells to the occurrence of neuroinflammation after acute systemic inflammation, we precisely characterized them by flow cytometry, studied changes in their proportions and level of activation, and measured the amount of cytokines they released by Cytometric Bead Array™ after cell sorting and ex vivo culture. Because of the central role that the chemokine CCL2 seems to play in our paradigm, we studied the effect of CCL2 on the activity of serotonergic neurons of the raphe nucleus using electrophysiological recordings. Results We report that systemic LPS administration in mice caused a marked increase in pro-inflammatory IL-1β, IL-6, TNFα and CCL2 (monocyte chemoattractant protein-1) mRNA and protein levels in the brain. Moreover, we found that LPS caused microglia and CNS-associated phagocyte activation characterized by upregulation of CCR2, TLR4/CD14, CD80 and IL-4Rα, associated with overproduction of pro-inflammatory cytokines and chemokines, especially CCL2. LPS also induced a marked and selective increase of CCR2+ inflammatory monocytes within the brain. Finally, we showed that CCL2 hyperpolarized serotonergic raphe neurons in mouse midbrain slices, thus probably reducing the serotonin tone in projection areas. Conclusion Together, we provide a detailed characterization of the molecular and cellular players involved in the establishment of neuroinflammation after systemic injection of LPS. This highlights the importance of the CCL2/CCR2 signaling and suggests a possible link with depressive disorders.
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Abstract
Since CXCL12 and its receptors, CXCR4 and CXCR7, have been found in the brain, the role of this chemokine has been expanded from chemoattractant in the immune system to neuromodulatory in the brain. Several pieces of evidence suggest that this chemokine system could crosstalk with the GABAergic system, known to be the main inhibitory neurotransmitter system in the brain. Indeed, GABA and CXCL12 as well as their receptors are colocalized in many cell types including neurons and there are several examples in which these two systems interact. Several mechanisms can be proposed to explain how these systems interact, including receptor–receptor interactions, crosstalk at the level of second messenger cascades, or direct pharmacological interactions, as GABA and GABAB receptor agonists/antagonists have been shown to be allosteric modulators of CXCR4. The interplay between CXCL12/CXCR4-CXCR7 and GABA/GABAA-GABAB receptors systems could have many physiological implications in neurotransmission, cancer and inflammation. In addition, the GABAB agonist baclofen is currently used in medicine to treat spasticity in patients with spinal cord injury, cerebral palsy, traumatic brain injury, multiple sclerosis, and other disorders. More recently it has also been used in the treatment of alcohol dependence and withdrawal. The allosteric effects of this agent on CXCR4 could contribute to these beneficial effects or at the opposite, to its side effects.
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Affiliation(s)
- Alice Guyon
- CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275, Université Nice Sophia Antipolis Valbonne, France
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Guyon A. CXCL12 chemokine and its receptors as major players in the interactions between immune and nervous systems. Front Cell Neurosci 2014; 8:65. [PMID: 24639628 PMCID: PMC3944789 DOI: 10.3389/fncel.2014.00065] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 02/13/2014] [Indexed: 11/13/2022] Open
Abstract
The chemokine CXCL12/stromal cell-derived factor 1 alpha has first been described in the immune system where it functions include chemotaxis for lymphocytes and macrophages, migration of hematopoietic cells from fetal liver to bone marrow and the formation of large blood vessels. Among other chemokines, CXCL12 has recently attracted much attention in the brain as it has been shown that it can be produced not only by glial cells but also by neurons. In addition, its receptors CXCR4 and CXCR7, which are belonging to the G protein-coupled receptors family, are abundantly expressed in diverse brain area, CXCR4 being a major co-receptor for human immunodeficiency virus 1 entry. This chemokine system has been shown to play important roles in brain plasticity processes occurring during development but also in the physiology of the brain in normal and pathological conditions. For example, in neurons, CXCR4 stimulation has been shown regulate the synaptic release of glutamate and γ-aminobutyric acid (GABA). It can also act post-synaptically by activating a G protein activated inward rectifier K+ (GIRK), a voltage-gated K channel Kv2.1 associated to neuronal survival, and by increasing high voltage activated Ca2+ currents. In addition, it has been recently evidenced that there are several cross-talks between the CXCL12/CXCR4–7 system and other neurotransmitter systems in the brain (such as GABA, glutamate, opioids, and cannabinoids). Overall, this chemokine system could be one of the key players of the neuro-immune interface that participates in shaping the brain in response to changes in the environment.
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Affiliation(s)
- Alice Guyon
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR 7275 Centre National de la Recherche Scientifique/Université Nice Sophia Antipolis Valbonne, France
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Conductier G, Viola A, le Troter A, Nahon JL, Guyon A. [Beating frequency of motile cilia lining the third cerebral ventricle is finely tuned by the hypothalamic peptide MCH]. Med Sci (Paris) 2013; 29:943-5. [PMID: 24280491 DOI: 10.1051/medsci/20132911004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Grégory Conductier
- Institut de pharmacologie moléculaire et cellulaire (IPMC), UMR 7275 CNRS, Université Nice Sophia Antipolis, 660, route des lucioles, 06560 Valbonne, France
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Petit-Paitel A, Ménard B, Guyon A, Béringue V, Nahon JL, Zsürger N, Chabry J. Prion protein is a key determinant of alcohol sensitivity through the modulation of N-methyl-D-aspartate receptor (NMDAR) activity. PLoS One 2012; 7:e34691. [PMID: 22536327 PMCID: PMC3335038 DOI: 10.1371/journal.pone.0034691] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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: 01/09/2012] [Accepted: 03/06/2012] [Indexed: 11/21/2022] Open
Abstract
The prion protein (PrP) is absolutely required for the development of prion diseases; nevertheless, its physiological functions in the central nervous system remain elusive. Using a combination of behavioral, electrophysiological and biochemical approaches in transgenic mouse models, we provide strong evidence for a crucial role of PrP in alcohol sensitivity. Indeed, PrP knock out (PrP−/−) mice presented a greater sensitivity to the sedative effects of EtOH compared to wild-type (wt) control mice. Conversely, compared to wt mice, those over-expressing mouse, human or hamster PrP genes presented a relative insensitivity to ethanol-induced sedation. An acute tolerance (i.e. reversion) to ethanol inhibition of N-methyl-D-aspartate (NMDA) receptor-mediated excitatory post-synaptic potentials in hippocampal slices developed slower in PrP−/− mice than in wt mice. We show that PrP is required to induce acute tolerance to ethanol by activating a Src-protein tyrosine kinase-dependent intracellular signaling pathway. In an attempt to decipher the molecular mechanisms underlying PrP-dependent ethanol effect, we looked for changes in lipid raft features in hippocampus of ethanol-treated wt mice compared to PrP−/− mice. Ethanol induced rapid and transient changes of buoyancy of lipid raft-associated proteins in hippocampus of wt but not PrP−/− mice suggesting a possible mechanistic link for PrP-dependent signal transduction. Together, our results reveal a hitherto unknown physiological role of PrP on the regulation of NMDAR activity and highlight its crucial role in synaptic functions.
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Affiliation(s)
- Agnès Petit-Paitel
- Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France
| | - Baptiste Ménard
- Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France
| | - Alice Guyon
- Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France
| | - Vincent Béringue
- Institut National de la Recherche Agronomique, UR892, Virologie et Immunologie Moléculaires, Jouy-en-Josas, France
| | - Jean-Louis Nahon
- Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France
| | - Nicole Zsürger
- Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France
| | - Joëlle Chabry
- Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France
- * E-mail:
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Guyon A, Balbo M, Morselli L, Tasali E, Leproult R, Van Cauter E, Spiegel K. Effets d’un déficit de sommeil sur le système nerveux autonome et l’axe hypothalamo-hypophyso-surrénalien. Neurophysiol Clin 2012. [DOI: 10.1016/j.neucli.2012.02.043] [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: 10/28/2022] Open
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Morselli L, Balbo M, van Cauter E, Guyon A, Spiegel K. Restriction de sommeil chez l’adulte obèse : impact sur la prise calorique et la régulation neuroendocrinienne de l’appétit. Neurophysiol Clin 2012. [DOI: 10.1016/j.neucli.2012.02.007] [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: 11/26/2022] Open
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Conductier G, Nahon JL, Guyon A. Dopamine depresses melanin concentrating hormone neuronal activity through multiple effects on α2-noradrenergic, D1 and D2-like dopaminergic receptors. Neuroscience 2011; 178:89-100. [PMID: 21262322 DOI: 10.1016/j.neuroscience.2011.01.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 12/27/2010] [Accepted: 01/17/2011] [Indexed: 10/18/2022]
Abstract
Two neuronal populations of the lateral hypothalamus that, respectively, produce melanin-concentrating hormone (MCH) and orexin peptides are crucially involved in control of metabolism, feeding and related goal-oriented behaviors. In contrast to orexin neurons, mainly involved in short-term regulation of feeding, MCH neurons participate in long-term control of energy storage and body weight. Beyond its effect on feeding, MCH has also been shown to be involved in regulation of seeking behavior and addiction through modulation of dopamine (DA) metabolism. This regulation is essential for reinforcement-associated behaviors. Moreover, drugs of abuse, which increase extracellular DA levels, are known to decrease food intake. Consistent with this observation, DA has been shown to modulate orexin neurons of the lateral hypothalamus. However, no study is available concerning the effects of DA on MCH neurons. Whole-cell patch-clamp recordings were done in hypothalamic mouse brain slices. MCH neurons were identified by Tau-Cyan-GFP labeling using a transgenic mouse model (MCH-GFP). First, we show that DA (10-200 μM) induces an outward current in MCH neurons. However, this current is not due to activation of DA receptors, but mediated through activation of α2-noradrenergic receptors and subsequent opening of G-protein activated inward rectifier K+ (GIRK) channels. Current-clamp experiments revealed that this GIRK-activation leads to hyperpolarization, thus decreasing excitability of MCH neurons. Furthermore, we confirm that MCH neurons receive mainly GABAergic inputs rather than glutamatergic ones. We show that DA modulates these inputs in a complex manner: at low concentrations, DA activates D1-like receptors, promoting presynaptic activity, whereas, at higher concentrations (100 μM), D2-like receptor activation inhibits presynaptic activity. Overall, DA should lead to a decrease in MCH neuron excitability, likely resulting in down-regulation of MCH release and feeding behavior.
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Affiliation(s)
- G Conductier
- Institut de Pharmacologie Moléculaire et Cellulaire, UMR6097, Centre National de la Recherche Scientifique (CNRS), 660 route des Lucioles, Valbonne, France
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Apartis E, Mélik-Parsadaniantz S, Guyon A, Kitabgi P, Rostène W. [Chemokines as new actors in the dopaminergic system]. Biol Aujourdhui 2011; 204:295-300. [PMID: 21215246 DOI: 10.1051/jbio/2010023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Indexed: 05/30/2023]
Abstract
Previous neuroanatomical studies realized in our team allowed us to demonstrate the neuronal and glial expression of various chemokines and their receptors in central dopaminergic (DA) pathways. In the light of these original observations, we questioned the role of chemokines on the physiology of DA neuron and on the neurodegenerative process in the DA nigro-striatal pathway, which characterizes Parkinson's disease. We focused our attention on two particular chemokines, the Stromal cell-Derived Factor-1 (SDF-1/CXCL12) and the Monocyte Chemoattractant Protein-1 (MCP-1/CCL2) and their cognate receptors CXCR4 and CCR2, as they are expressed constitutively in nearly all DA mesencephalic neurons. We demonstrated, by using in vivo and in vitro approaches, that SDF-1 and MCP-1 can modulate DA neurotransmission in the nigro-striatal pathway, modifying the electrophysiological state of the neuron and DA release, through their cognate receptors. These effects are produced through N-type high voltage-activated calcium currents for SDF-1 and potassium channels for MCP-1. We then discuss the possible implication of SDF-1 and its derivative SDF-1(5-67) in DA neurodegeneration.
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Affiliation(s)
- Emmanuelle Apartis
- AP-HP, Service de Physiologie de l'Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75012 Paris, France.
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Rostène W, Guyon A, Kular L, Godefroy D, Barbieri F, Bajetto A, Banisadr G, Callewaere C, Conductier G, Rovère C, Mélik-Parsadaniantz S, Florio T. Chemokines and chemokine receptors: new actors in neuroendocrine regulations. Front Neuroendocrinol 2011; 32:10-24. [PMID: 20624414 DOI: 10.1016/j.yfrne.2010.07.001] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 06/25/2010] [Accepted: 07/01/2010] [Indexed: 11/19/2022]
Abstract
Chemokines are small secreted proteins that chemoattract and activate immune and non-immune cells. Their role in the immune system is well-known, and it has recently been suggested that they may also play a role in the central nervous system (CNS). Indeed, they do not only act as immunoinflammatory mediators in the brain but they also act as potential modulators in neurotransmission. Although we are only beginning to be aware of the implication of chemokines in neuroendocrine functions, this review aims at summarizing what is known in that booming field of research. First we describe the expression of chemokines and their receptors in the CNS with a focus on the hypothalamo-pituitary system. Secondly, we present what is known on some chemokines in the regulation of neuroendocrine functions such as cell migration, stress, thermoregulation, drinking and feeding as well as anterior pituitary functions. We suggest that chemokines provide a fine modulatory tuning system of neuroendocrine regulations.
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Affiliation(s)
- William Rostène
- INSERM-UPMC, UMRS 732, Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 17 rue Moreau, Paris Cedex 12, France.
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Conductier G, Blondeau N, Guyon A, Nahon JL, Rovère C. The role of monocyte chemoattractant protein MCP1/CCL2 in neuroinflammatory diseases. J Neuroimmunol 2010; 224:93-100. [DOI: 10.1016/j.jneuroim.2010.05.010] [Citation(s) in RCA: 287] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Guyon A, Conductier G, Rovere C, Enfissi A, Nahon JL. Melanin-concentrating hormone producing neurons: Activities and modulations. Peptides 2009; 30:2031-9. [PMID: 19524001 DOI: 10.1016/j.peptides.2009.05.028] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2009] [Revised: 03/25/2009] [Accepted: 05/25/2009] [Indexed: 10/20/2022]
Abstract
Regulation of energy homeostasis in animals involves adaptation of energy intake to its loss, through a perfect regulation of feeding behavior and energy storage/expenditure. Factors from the periphery modulate brain activity in order to adjust food intake as needed. Particularly, "first order" neurons from arcuate nucleus are able to detect modifications in homeostatic parameters and to transmit information to "second order" neurons, partly located in the lateral hypothalamic area. These "second order" neurons have widespread projections throughout the brain and their proper activation leads them to a coordinated response associated to an adapted behavior. Among these neurons, melanin-concentrating hormone (MCH) expressing neurons play an integrative role of the various factors arising from periphery, first order neurons and extra-hypothalamic arousal systems neurons and modulate regulation of feeding, drinking and seeking behaviors. As regulation of MCH release is correlated to regulation of MCH neuronal activity, we focused this review on the electrophysiological properties of MCH neurons from the lateral hypothalamic area. We first reviewed the knowledge on the endogenous electrical properties of MCH neurons identified according to various criteria which are described. Then, we dealt with the modulations of the electrical activity of MCH neurons by different factors such as glucose, glutamate and GABA, peptides and hormones regulating feeding and transmitters of extra-hypothalamic arousal systems. Finally, we described the current knowledge on the modulation of MCH neuronal activity by cytokines and chemokines. Because of such regulation, MCH neurons are some of the best candidate to account for infection-induced anorexia, but also obesity.
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Affiliation(s)
- Alice Guyon
- Institut de Pharmacologie Moléculaire et Cellulaire, Univrsité de Nice-Sophia Antipolis, Centre National de la Recherche Scientifique, Valbonne, France.
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Cotta-Grand N, Rovère C, Guyon A, Cervantes A, Brau F, Nahon JL. Melanin-concentrating hormone induces neurite outgrowth in human neuroblastoma SH-SY5Y cells through p53 and MAPKinase signaling pathways. Peptides 2009; 30:2014-24. [PMID: 19540893 DOI: 10.1016/j.peptides.2009.06.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Revised: 06/05/2009] [Accepted: 06/11/2009] [Indexed: 01/08/2023]
Abstract
Melanin-concentrating hormone (MCH) peptide plays a major role in energy homeostasis regulation. Little is known about cellular functions engaged by endogenous MCH receptor (MCH-R1). Here, MCH-R1 mRNA and cognate protein were found expressed in human neuroblastoma SH-SY5Y cells. Electrophysiological experiments demonstrated that MCH modulated K(+) currents, an effect depending upon the time of cellular growth. MCH treatments induced a transient phosphorylation of MAPKinases, abolished by PD98059, and partially blocked by PTX, suggesting a Galphai/Galphao protein contribution. MCH stimulated expression and likely nuclear localization of phosphorylated p53 proteins, an effect fully dependent upon MAPKinase activities. MCH treatment also increased phosphorylation of Elk-1 and up-regulated Egr-1, two transcriptional factors targeted by the MAPKinase pathway. Finally, MCH provoked neurite outgrowth after 24h-treatment of neuroblastoma cells. This effect and transcriptional factors activation were partly prevented by PD98059. Collectively, our results provide the first evidence for a role of MCH in neuronal differentiation of endogenously MCH-R1-expressing cells via non-exclusive MAPKinase and p53 signaling pathways.
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Affiliation(s)
- Natacha Cotta-Grand
- The Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique and Université Nice-Sophia Antipolis, Valbonne, France
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Guyon A, Skrzydelski D, De Giry I, Rovère C, Conductier G, Trocello JM, Daugé V, Kitabgi P, Rostène W, Nahon JL, Mélik Parsadaniantz S. Long term exposure to the chemokine CCL2 activates the nigrostriatal dopamine system: a novel mechanism for the control of dopamine release. Neuroscience 2009; 162:1072-80. [PMID: 19477239 DOI: 10.1016/j.neuroscience.2009.05.048] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2009] [Revised: 05/20/2009] [Accepted: 05/20/2009] [Indexed: 12/28/2022]
Abstract
Accumulating evidence show that chemokines can modulate the activity of neurons through various mechanisms. Recently, we demonstrated that CCR2, the main receptor for the chemokine CCL2, is constitutively expressed in dopamine neurons in the rat substantia nigra. Here we show that unilateral intranigral injections of CCL2 (50 ng) in freely moving rats increase extracellular concentrations of dopamine and its metabolites and decrease dopamine content in the ipsilateral dorsal striatum. Furthermore, these CCL2 injections are responsible for an increase in locomotor activity resulting in contralateral circling behavior. Using patch-clamp recordings of dopaminergic neurons in slices of the rat substantia nigra, we observed that a prolonged exposure (>8 min) to 10 nM CCL2 significantly increases the membrane resistance of dopaminergic neurons by closure of background channels mainly selective to potassium ions. This leads to an enhancement of dopaminergic neuron discharge in pacemaker or burst mode necessary for dopamine release. We provide here the first evidence that application of CCL2 on dopaminergic neurons increases their excitability, dopamine release and related locomotor activity.
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Affiliation(s)
- A Guyon
- Institut de Pharmacologie Moléculaire et Cellulaire, CNRS UNSA, UMR, 6097 CNRS, 660 Route des Lucioles, Sophia Antipolis, 06560, Valbonne, France.
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Guyon A, Skrzydelski D, Rovère C, Apartis E, Rostène W, Kitabgi P, Mélik Parsadaniantz S, Nahon JL. Stromal-cell-derived factor 1α /CXCL12 modulates high-threshold calcium currents in rat substantia nigra. Eur J Neurosci 2008; 28:862-70. [DOI: 10.1111/j.1460-9568.2008.06367.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
Following inflammation or infection, cytokines are released in the blood. Besides their effect on the immune system, cytokines can also act in the brain to modulate our behaviors, inducing for example anorexia when produced in large amount. This review focuses on our current knowledge on how cytokines can influence the brain and the behaviors through several possible pathways: modulating peripheral neurons which project to the brain through the vagus nerve, modulating the levels of hormones such as leptin which can act to the brain through the humoral pathway and possibly acting directly in the brain, through the local production of cytokines and chemokines such as SDF-1alpha/CXCL12.
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Affiliation(s)
- Alice Guyon
- Institut de Pharmacologie Moléculaire et Cellulaire, UNSA, CNRS, Sophia Antipolis, 660, route des Lucioles, 06560, Valbonne, France.
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Skrzydelski D, Guyon A, Daugé V, Rovère C, Apartis E, Kitabgi P, Nahon JL, Rostène W, Parsadaniantz SM. The chemokine stromal cell-derived factor-1/CXCL12 activates the nigrostriatal dopamine system. J Neurochem 2007; 102:1175-83. [PMID: 17509088 DOI: 10.1111/j.1471-4159.2007.04639.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We recently demonstrated that dopaminergic (DA) neurons of the rat substantia nigra constitutively expressed CXCR4, receptor for the chemokine stromal cell-derived factor-1 (SDF-1)/CXCL12 (SDF-1). To check the physiological relevance of such anatomical observation, in vitro and in vivo approaches were used. Patch clamp recording of DA neurons in rat substantia nigra slices revealed that SDF-1 (10 nmol/L) induced: (i) a depolarization and increased action potential frequency; and (ii) switched the firing pattern of depolarized DA neurons from a tonic to a burst firing mode. This suggests that SDF-1 could increase DA release from neurons. Consistent with this hypothesis, unilateral intranigral injection of SDF-1 (50 ng) in freely moving rat decreased DA content and increased extracellular concentrations of DA and metabolites in the ipsilateral dorsal striatum, as shown using microdialysis. Furthermore, intranigral SDF-1 injection induced a contralateral circling behavior. These effects of SDF-1 were mediated via CXCR4 as they were abrogated by administration of a selective CXCR4 antagonist. Altogether, these data demonstrate that SDF-1, via CXCR4, activates nigrostriatal DA transmission. They show that the central functions of chemokines are not restricted, as originally thought, to neuroinflammation, but extend to neuromodulatory actions on well-defined neuronal circuits in non-pathological conditions.
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Affiliation(s)
- D Skrzydelski
- Institut National de la Santé et de la Recherche Médicale (INSERM) U 732, Université Pierre et Marie Curie-Paris 6, Hôpital Saint-Antoine, Paris Cedex, France
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Abstract
The chemokine SDF-1alpha and its cognate receptor CXCR4 are expressed in several neuronal populations. This review focuses on our current knowledge about the actions of this chemokine on neuronal excitability, through CXCR4 or other yet unknown pathways. In various neuronal populations (CA1 neurons of the hippocampus, granular and Purkinje cells of the cerebellum, melanin-concentrating hormone neurons of the lateral hypothalamus, vasopressinergic neurons of the supraoptic and the paraventricular nucleus of the hypothalamus, and dopaminergic neurons of the substantia nigra), SDF-1alpha can modulate the activity of neurons by multiple regulatory pathways including and often combining: (i) modulation of voltage-dependent channels (sodium, potassium, and calcium), (ii) activation of the G-protein-activated inward rectifier potassium current, and (iii) increase in neurotransmitter release (gamma-amino butyric acid (GABA), glutamate, and dopamine), often through Ca-dependent mechanisms. The possible mechanisms underlying these effects and their consequences in terms of modulation of neuroendocrine systems and physiopathology are discussed.
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Affiliation(s)
- Alice Guyon
- CNRS UMR 6097, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, Valbonne, France.
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Guyon A, Skrzydelsi D, Rovère C, Rostène W, Parsadaniantz SM, Nahon JL. Stromal cell-derived factor-1alpha modulation of the excitability of rat substantia nigra dopaminergic neurones: presynaptic mechanisms. J Neurochem 2006; 96:1540-50. [PMID: 16476083 DOI: 10.1111/j.1471-4159.2006.03659.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In rat substantia nigra (SN), Chemokine (CXC motif) receptor 4 (CXCR4) for the chemokine stromal cell-derived factor (SDF)-1alpha is expressed on dopaminergic (DA) neurones, but also on non-DA cells, suggesting presynaptic actions. Using whole-cell patch-clamp recordings in DA neurones of rat SN slices at a holding potential of -60 mV, we showed here that SDF-1alpha exerts multiple presynaptic effects. First, SDF-1alpha (10 nm) induced an increase in the frequency of spontaneous and miniature GABA(A) postsynaptic currents by presynaptic mechanisms, consistent with the presence of CXCR4 on GABAergic neurones of the SN, as revealed by immunocytochemistry. Second, SDF-1alpha (0.1-1 nm) induced a glutamatergic inward current resistant to tetrodotoxin (TTX), most probably the result of glutamate release from non-neuronal cells. This inward current was not blocked by the CXCR4 antagonist AMD 3100 (1 microm), consistent with the lack of CXCR4 on astrocytes as shown by immunocytochemistry under basal conditions. Finally, SDF-1alpha (10 nm) induced, via CXCR4, an outward G protein-activated inward rectifier (GIRK) current, which was TTX sensitive and prevented by application of the GABA(B) antagonist CGP55845A, suggesting GABA spillover on to GABA(B) receptors. Our results show that SDF-1alpha induces, via presynaptic mechanisms, alterations in the excitability of DA neurones as confirmed by current-clamp experiments.
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Affiliation(s)
- A Guyon
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 6097, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia-Antipolis, Valbonne 06560, France
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Guyon A, Nahon JL. [Inflammation mediators and control of food intake]. Journ Annu Diabetol Hotel Dieu 2006:25-35. [PMID: 17051847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Affiliation(s)
- A Guyon
- CNRS UMR 6097, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, 660 route des Lucioles, 06560 Valbonne
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