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Mettler C, Beeker N, Mathis C, Treluyer J, Le Guern V, Chouchana L, Terrier B. La survenue d’une naissance prématurée chez les femmes enceintes atteintes de vascularite systémique: une étude de cohorte nationale. Rev Med Interne 2021. [DOI: 10.1016/j.revmed.2021.10.256] [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: 10/19/2022]
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2
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Mettler C, Beeker N, Mathis C, Treluyer J, Le Guern V, Chouchana L, Terrier B. Utilisation des traitements immunosuppresseurs pendant la grossesse chez les femmes atteintes de vascularite systémique : une étude de cohorte nationale. Rev Med Interne 2021. [DOI: 10.1016/j.revmed.2021.10.257] [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: 10/19/2022]
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Mathis C, Hamitouche S, Barberot JP, Lindas P. Refractory lymphorrhoea of the neck treated with etilefrine. Eur Ann Otorhinolaryngol Head Neck Dis 2021; 138:383-386. [PMID: 33608232 DOI: 10.1016/j.anorl.2021.02.006] [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] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
BACKGROUND Intraoperative injury of the thoracic duct is an uncommon complication of head and neck surgery, which is difficult to manage and associated with serious consequences. We report a case of lymphorrhoea of the neck refractory to all the usual treatments that resolved in response to a treatment strategy described in thoracic and visceral surgery: use of a sympathomimetic drug, etilefrine. To our knowledge and after review of the literature, this is the first reported case of lymphorrhoea of the neck treated by etilefrine. CASE REPORT Our patient presented massive lymphatic fluid leakage following left neck dissection as part of the management of oropharyngeal cancer with lymph node metastases. The treatments usually proposed, such as intraoperative repair and appropriate dietary and drug management, were not effective, resulting in multiple, severe complications. After evaluation of the benefit-risk balance, treatment with etilefrine was introduced at the dosages proposed in the literature for the management of chylothorax. This treatment allowed complete resolution of the lymphatic fluid leak after one week. DISCUSSION Etilefrine can therefore be added to the treatment options for the management of lymphatic fluid leaks refractory to the usual treatments.
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Affiliation(s)
- C Mathis
- Service d'ORL, CHU, 29, avenue du Maréchal de Lattre de Tassigny, 54035 Nancy, France.
| | - S Hamitouche
- Service d'ORL, CHU, 29, avenue du Maréchal de Lattre de Tassigny, 54035 Nancy, France
| | - J-P Barberot
- Service d'ORL, Hôpital Robert Schuman, 57045 Metz cedex 01, France
| | - P Lindas
- Service d'ORL, Hôpital Robert Schuman, 57045 Metz cedex 01, France
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Nickols N, Kishan A, Kane N, Diaz-Perez S, Ganapathy E, Nazarian R, Felix C, Mathis C, Kwak J, Basehart V, Zomorodian N, King C, Kupelian P, Rettig M, Steinberg M, Cao M, Knudsen B, Schaue D, Reiter R. Phase I Trial of Stereotactic Body Radiotherapy Neoadjuvant to Radical Prostatectomy for Patients with Unfavorable and High-Risk Non-Metastatic Prostate Cancer: Feasibility And Safety. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1849] [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: 11/29/2022]
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Wilckens KA, Tudorascu D, Snitz BE, Price J, Aizenstein H, Lopez O, Erickson K, Lopresti B, Laymon C, Minhas D, Mathis C, Buysse D, Klunk W, Cohen AD. 1008 Sleep Efficiency Moderates The Relationship Between Beta-Amyloid And Memory Retention. Sleep 2018. [DOI: 10.1093/sleep/zsy061.1007] [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)
| | | | - B E Snitz
- University of Pittsburgh, Pittsburgh, PA
| | - J Price
- University of Pittsburgh, Charlestown, MA
| | | | - O Lopez
- University of Pittsburgh, Pittsburgh, PA
| | - K Erickson
- University of Pittsburgh, Pittsburgh, PA
| | - B Lopresti
- University of Pittsburgh, Pittsburgh, PA
| | - C Laymon
- University of Pittsburgh, Pittsburgh, PA
| | - D Minhas
- University of Pittsburgh, Pittsburgh, PA
| | - C Mathis
- University of Pittsburgh, Pittsburgh, PA
| | - D Buysse
- University of Pittsburgh, Pittsburgh, PA
| | - W Klunk
- University of Pittsburgh, Pittsburgh, PA
| | - A D Cohen
- University of Pittsburgh, Pittsburgh, PA
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Iskandar AR, Titz B, Sewer A, Leroy P, Schneider T, Zanetti F, Mathis C, Elamin A, Frentzel S, Schlage WK, Martin F, Ivanov NV, Peitsch MC, Hoeng J. Systems toxicology meta-analysis of in vitro assessment studies: biological impact of a candidate modified-risk tobacco product aerosol compared with cigarette smoke on human organotypic cultures of the aerodigestive tract. Toxicol Res (Camb) 2017; 6:631-653. [PMID: 30090531 PMCID: PMC6062142 DOI: 10.1039/c7tx00047b] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [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: 02/16/2017] [Accepted: 05/26/2017] [Indexed: 12/22/2022] Open
Abstract
Systems biology combines comprehensive molecular analyses with quantitative modeling to understand the characteristics of a biological system as a whole. Leveraging a similar approach, systems toxicology aims to decipher complex biological responses following exposures. This work reports a systems toxicology meta-analysis in the context of in vitro assessment of a candidate modified-risk tobacco product (MRTP) using three human organotypic cultures of the aerodigestive tract (buccal, bronchial, and nasal epithelia). Complementing a series of functional measures, a causal network enrichment analysis of transcriptomic data was used to compare quantitatively the biological impact of aerosol from the Tobacco Heating System (THS) 2.2, a candidate MRTP, with 3R4F cigarette smoke (CS) at similar nicotine concentrations. Lower toxicity was observed in all cultures following exposure to THS2.2 aerosol compared with 3R4F CS. Because of their morphological differences, a smaller exposure impact was observed in the buccal (stratified epithelium) compared with the bronchial and nasal (pseudostratified epithelium). However, the causal network enrichment approach supported a similar mechanistic impact of CS across the three cultures, including the impact on xenobiotic, oxidative stress, and inflammatory responses. At comparable nicotine concentrations, THS2.2 aerosol elicited reduced and more transient effects on these processes. To demonstrate the benefits of additional data modalities, we employed a newly established targeted mass-spectrometry marker panel to further confirm the reduced cellular stress responses elicited by THS2.2 aerosol compared with 3R4F CS in the nasal culture. Overall, this work demonstrates the applicability and robustness of the systems toxicology approach for in vitro inhalation toxicity assessment.
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Affiliation(s)
- A R Iskandar
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - B Titz
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - A Sewer
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - P Leroy
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - T Schneider
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - F Zanetti
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - C Mathis
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - A Elamin
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - S Frentzel
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - W K Schlage
- Biology consultant , Max-Baermann-Str. 21 , 51429 Bergisch Gladbach , Germany
| | - F Martin
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - N V Ivanov
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - M C Peitsch
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
| | - J Hoeng
- PMI R&D , Philip Morris Products S.A. (part of the Philip Morris International group of companies) , Quai Jeanrenaud 5 , CH-2000 Neuchâtel , Switzerland . ; ; Tel: +41 (58)242 2214
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Kumar T, Mathis C, Sathanandam S, Zurakowski D, Subramanian S, Allen J, Solimine M, Berrios L, Jackson S, Landers M, Sullivan R, Barnett S, Loftis C, Price L, Tansey J, Hoskoppal D, Knott-Craig C. Effect of Thyroid Hormone on Cardiac Function Following Orthotopic Heart Transplantation in Piglets. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.724] [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: 11/16/2022] Open
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Zanetti F, Schlage W, Sewer A, Leroy P, Majeed S, Guedj E, Trivedi K, Elamin A, Frentzel S, Iskandar A, Kostadinova R, Mathis C, Ivanov N, Peitsch M, Hoeng J. Systems toxicology assessment of a heat-not-burn product aerosol compared with cigarette smoke on organotypic buccal epithelial cultures. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.203] [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: 11/28/2022]
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Frentzel S, Steiner S, Majeed S, Vuillaume G, Kleinhans S, Nordlund M, Mathis C, Hoeng J. A new fluorescence based method for the characterization of in vitro aerosol exposure systems. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.201] [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: 10/20/2022]
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Iskandar A, Mathis C, Martin F, Leroy P, Sewer A, Majeed S, Kuehn D, Trivedi K, Grandolfo D, Cabanski M, Guedj E, Merg C, Frentzel S, Ivanov N, Peitsch M, Hoeng J. An application of 3-D nasal cultures: Systems toxicological assessment of a candidate modified-risk tobacco product. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Martinez Y, Mathis C, Xiang Y, Leroy P, Sewer A, Mejeed S, Trivedi K, Guedj E, Merg C, Iskandar A, Schlage W, Frentzel S, Ivanov N, Peitsch M, Hoeng J. Systems toxicology assessment of a heat-not-burn product aerosol compared with conventional cigarette smoke on organotypic bronchial epithelial cultures. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.204] [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]
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Leroy P, Mathis C, Iskandar A, Frentzel S, Elamin A, Keyur T, Garcia E, Knorr A, Ivanov N, Hoeng J, Peitsch M. Comparative systems toxicology assessment of the Tobacco Heating System 2.2 and reference cigarettes (3R4F), on human organotypic respiratory tissue cultures. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1588] [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: 10/21/2022]
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13
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Kogel U, Gonzalez Suarez I, Xiang Y, Dossin E, Guy PA, Mathis C, Marescotti D, Goedertier D, Martin F, Peitsch MC, Hoeng J. Biological impact of cigarette smoke compared to an aerosol produced from a prototypic modified risk tobacco product on normal human bronchial epithelial cells. Toxicol In Vitro 2015; 29:2102-15. [PMID: 26277032 DOI: 10.1016/j.tiv.2015.08.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 07/10/2015] [Accepted: 08/10/2015] [Indexed: 01/09/2023]
Abstract
Cigarette smoking causes serious and fatal diseases. The best way for smokers to avoid health risks is to quit smoking. Using modified risk tobacco products (MRTPs) may be an alternative to reduce the harm caused for those who are unwilling to quit smoking, but little is known about the toxic effects of MRTPs, nor were the molecular mechanisms of toxicity investigated in detail. The toxicity of an MRTP and the potential molecular mechanisms involved were investigated in high-content screening tests and whole genome transcriptomics analyses using human bronchial epithelial cells. The prototypic (p)MRTP that was tested had less impact than reference cigarette 3R4F on the cellular oxidative stress response and cell death pathways. Higher pMRTP aerosol extract concentrations had impact on pathways associated with the detoxification of xenobiotics and the reduction of oxidative damage. A pMRTP aerosol concentration up to 18 times higher than the 3R4F caused similar perturbation effects in biological networks and led to the perturbation of networks related to cell stress, and proliferation biology. These results may further facilitate the development of a systems toxicology-based impact assessment for use in future risk assessments in line with the 21st century toxicology paradigm, as shown here for an MRTP.
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Affiliation(s)
- U Kogel
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - I Gonzalez Suarez
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - Y Xiang
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - E Dossin
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - P A Guy
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - C Mathis
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - D Marescotti
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - D Goedertier
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - F Martin
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - M C Peitsch
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - J Hoeng
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
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Steiner S, Majeed S, Pierrick D, Vuillaume G, Dossin E, Guy P, Frentzel S, Nordlund M, Mathis C, Bentley M, Hoeng J. Gas-vapor phase and particulate matter partitioning of 3R4F aerosol components and their delivery in the Vitrocell 24/48 ® aerosol exposure system. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.400] [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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Mathis C, Iskandar A, Johne S, Majeed S, Grandolfo D, Kuehn D, Merg C, Elamin A, Guedj E, Dulize R, Peric D, Trivedi K, Benyagoub A, Xiang Y, Martin F, Leroy P, Frentzel S, Ivanov N, Peitsch M, Hoeng J. Assessment of the Tobacco Heating System 2.2, a candidate Modified Risk Tobacco Product, on human organotypic nasal and bronchial epithelial tissue culture using systems toxicology approach. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.920] [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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Roucher A, Zaoui P, Tartry D, Choukroun G, Mathis C, Moulin B, Fauvel J. Surveillance de la kaliémie et de la créatininémie au cours des essais cliniques par le laboratoire centralisé ou local ? Nephrol Ther 2015. [DOI: 10.1016/j.nephro.2015.07.393] [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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Ouédraogo S, Dabakuyo-Yonli TS, Roussot A, Dialla PO, Pornet C, Poillot ML, Soler-Michel P, Sarlin N, Lunaud P, Desmidt P, Paré E, Mathis C, Rymzhanova R, Kuntz-Huon J, Exbrayat C, Bataillard A, Régnier V, Kalecinski J, Quantin C, Dumas A, Gentil J, Amiel P, Chauvin F, Dancourt V, Arveux P. [Breast cancer screening in thirteen French departments]. Bull Cancer 2015; 102:126-38. [PMID: 25636359 DOI: 10.1016/j.bulcan.2014.07.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [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: 02/24/2014] [Accepted: 07/04/2014] [Indexed: 11/15/2022]
Abstract
BACKGROUND In France, breast cancer screening programme, free of charge for women aged 50-74 years old, coexists with an opportunistic screening and leads to reduction in attendance in the programme. Here, we reported participation in organized and/or opportunistic screening in thirteen French departments. POPULATION AND METHODS We analyzed screening data (organized and/or opportunistic) of 622,382 women aged 51-74 years old invited to perform an organized mammography screening session from 2010 to 2011 in the thirteen French departments. The type of mammography screening performed has been reported according to women age, their health insurance scheme, the rurality and the socioeconomic level of their area or residence. We also represented the tertiles of deprivation and participation in mammography screening for each department. RESULTS A total of 390,831 (62.8%) women performed a mammography screening (organized and/or opportunistic) after the invitation. These women were mainly aged from 55-69 years old, insured by the general insurance scheme and lived in urban, semi-urban or affluent areas. CONCLUSION The participation in mammography screening (organized and opportunistic) in France remains below the target rate of 70% expected by health authorities to reduce breast cancer mortality through screening.
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Affiliation(s)
- Samiratou Ouédraogo
- Centre régional de lutte contre le cancer Georges-François Leclerc, registre des cancers du sein et autres cancers gynécologiques de Côte-d'Or, 1, rue Professeur-Marion, 21000 Dijon, France; Université de Bourgogne, faculté de médecine et de pharmacie de Dijon, EA 4184, 7, boulevard Jeanne-d'Arc, 21000 Dijon, France.
| | - Tienhan Sandrine Dabakuyo-Yonli
- Université de Bourgogne, faculté de médecine et de pharmacie de Dijon, EA 4184, 7, boulevard Jeanne-d'Arc, 21000 Dijon, France; Centre régional de lutte contre le cancer Georges-François-Leclerc, unité de biostatistiques et de qualité de vie, 1, rue Professeur-Marion, 21000 Dijon, France
| | - Adrien Roussot
- Centre hospitalier universitaire, service de biostatistiques et d'informatique médicale, BP 77908, 21000 Dijon, France
| | - Pegdwendé Olivia Dialla
- Centre régional de lutte contre le cancer Georges-François Leclerc, registre des cancers du sein et autres cancers gynécologiques de Côte-d'Or, 1, rue Professeur-Marion, 21000 Dijon, France; Université de Bourgogne, faculté de médecine et de pharmacie de Dijon, EA 4184, 7, boulevard Jeanne-d'Arc, 21000 Dijon, France
| | - Carole Pornet
- CHU de Caen, département de recherche épidémiologique et évaluation, 14000 Caen, France; Université de Caen, faculté de médecine, EA3936, 14000 Basse-Normandie, Caen, France; Université de Caen Basse-Normandie, faculté de médecine, U1086 Inserm, cancers et prévention, avenue de la Côte-de-Nacre, 14000 Caen, France
| | - Marie-Laure Poillot
- Centre régional de lutte contre le cancer Georges-François Leclerc, registre des cancers du sein et autres cancers gynécologiques de Côte-d'Or, 1, rue Professeur-Marion, 21000 Dijon, France; Université de Bourgogne, faculté de médecine et de pharmacie de Dijon, EA 4184, 7, boulevard Jeanne-d'Arc, 21000 Dijon, France
| | - Patricia Soler-Michel
- Association pour le dépistage organisé des cancers dans le Rhône (Adémas-69), 5 bis, rue Cléberg, 69322 Lyon cedex 05, France
| | - Nathalie Sarlin
- Caisse primaire d'Assurance maladie de la Côte-d'Or, 8, rue du Dr-Maret, 21000 Dijon, France
| | - Philippe Lunaud
- Régime social des indépendants de Bourgogne, 41, rue de Mulhouse, 21000 Dijon, France
| | - Pascal Desmidt
- Mutualité sociale agricole de Bourgogne, 14, rue Félix-Trutat, 21000 Dijon, France
| | - Etienne Paré
- Drôme Ardèche prévention cancer (DAPC), 9, rue Georges-Méliès, 26000 Valence, France
| | - Corinne Mathis
- Réseau pour le dépistage des cancers en Haute-Savoie (RDC 74), 12, avenue de Chevenne, BP 50126, 74003 Annecy cedex, France
| | - Rachouan Rymzhanova
- Association pour le dépistage des cancers en Franche-Comté (ADECA-FC), 3, rue Paul-Bert, 25000 Besançon, France
| | - Janine Kuntz-Huon
- VIVRE 42 !, 58, rue Robespierre, BP 20279, 42014 Saint-Étienne cedex 2, France
| | - Catherine Exbrayat
- Office de lutte contre le cancer en Isère (ODLC Isère), 19, chemin de la Dhuy, Maupertuis, BP 139, 38244 Meylan, France
| | - Anne Bataillard
- Office de lutte contre le cancer dans l'Ain (ODLC Ain), 12, rue de la Grenouillère, 01000 Bour-en-Bresse, France
| | - Véronique Régnier
- Institut de cancérologie Lucien-Neuwirth, CIC-EC 3 Inserm, IFR 143, 42000 Saint-Étienne, France
| | - Julie Kalecinski
- Institut de cancérologie Lucien-Neuwirth, CIC-EC 3 Inserm, IFR 143, 42000 Saint-Étienne, France
| | - Catherine Quantin
- Centre hospitalier universitaire, service de biostatistiques et d'informatique médicale, BP 77908, 21000 Dijon, France; Université de Bourgogne, Inserm U866, 7, boulevard Jeanne-d'Arc, 21000 Dijon, France
| | - Agnès Dumas
- Institut de cancérologie Gustave-Roussy, 94805 Villejuif cedex, France
| | - Julie Gentil
- Centre régional de lutte contre le cancer Georges-François Leclerc, registre des cancers du sein et autres cancers gynécologiques de Côte-d'Or, 1, rue Professeur-Marion, 21000 Dijon, France; Université de Bourgogne, faculté de médecine et de pharmacie de Dijon, EA 4184, 7, boulevard Jeanne-d'Arc, 21000 Dijon, France
| | - Philippe Amiel
- Institut de cancérologie Gustave-Roussy, 94805 Villejuif cedex, France
| | - Franck Chauvin
- Institut de cancérologie Lucien-Neuwirth, CIC-EC 3 Inserm, IFR 143, 42000 Saint-Étienne, France; Université Lyon 1, hospices civils de Lyon, CNRS UMR 5558, 69002 Lyon, France
| | - Vincent Dancourt
- Université de Bourgogne, Inserm U866, 7, boulevard Jeanne-d'Arc, 21000 Dijon, France; Association pour le dépistage des cancers en Côte-d'Or et dans la Nièvre (ADECA 21-58), 16-18, rue Nodot, 21000 Dijon, France
| | - Patrick Arveux
- Centre régional de lutte contre le cancer Georges-François Leclerc, registre des cancers du sein et autres cancers gynécologiques de Côte-d'Or, 1, rue Professeur-Marion, 21000 Dijon, France; Université de Bourgogne, faculté de médecine et de pharmacie de Dijon, EA 4184, 7, boulevard Jeanne-d'Arc, 21000 Dijon, France
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Schaefer E, Lauer J, Durand M, Pelletier V, Obringer C, Claussmann A, Braun JJ, Redin C, Mathis C, Muller J, Schmidt-Mutter C, Flori E, Marion V, Stoetzel C, Dollfus H. Mesoaxial polydactyly is a major feature in Bardet-Biedl syndrome patients with LZTFL1 (BBS17) mutations. Clin Genet 2013; 85:476-81. [PMID: 23692385 DOI: 10.1111/cge.12198] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [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: 02/06/2013] [Revised: 05/16/2013] [Accepted: 05/16/2013] [Indexed: 10/26/2022]
Abstract
Ciliopathies are heterogeneous disorders sharing different clinical signs due to a defect at the level of the primary cilia/centrosome complex. Postaxial polydactyly is frequently reported in ciliopathies, especially in Bardet-Biedl syndrome (BBS). Clinical features and genetic results observed in a pair of dizygotic twins with BBS are reported. The following manifestations were present: retinitis pigmentosa, bilateral insertional polydactyly, cognitive impairment and renal dysfunction. X-rays of the hands confirmed the presence of a 4th mesoaxial extra-digit with Y-shaped metacarpal bones. The sequencing of LZTFL1 identified a missense mutation (NM_020347.2: p.Leu87Pro; c.260T>C) and a nonsense mutation (p.Glu260*; c.778G>T), establishing a compound heterozygous status for the twins. A major decrease of LZTFL1 transcript and protein was observed in the patient's fibroblasts. This is the second report of LZTFL1 mutations in BBS patients confirming LZTFL1 as a BBS gene. Interestingly, the only two families reported in literature thus far with LZTFL1 mutations have in common mesoaxial polydactyly, a very uncommon feature for BBS. This special subtype of polydactyly in BBS patients is easily identified on clinical examination and prompts for priority sequencing of LZTFL1 (BBS17).
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Affiliation(s)
- E Schaefer
- Laboratoire de Génétique Médicale, INSERM U1112, Faculté de Médecine de Strasbourg, Universitaires de Strasbourg, Strasbourg, France
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Dodart JC, Mathis C, Ungerer A. Des formes sécrétées du précurseur de la protéine ß-amyloïde impliqué dans la maladie d'Alzheimer améliorent la mémoire des souris. Med Sci (Paris) 2012. [DOI: 10.4267/10608/1319] [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: 11/30/2022] Open
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Ikonomovic M, Price J, Abrahamson E, Mathis C, Paljug W, Debnath M, Shao L, Becker C, Hamilton R, Klunk W. Direct Correlations of [H-3]Flutemetamol Binding with [H-3]PiB Binding and Amyloid-beta Concentration and Plaque Load in [C-11]PiB Imaged Brains (S34.002). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s34.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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21
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Prieux-Lucas K, Touati S, Lemdani M, Perron S, Serapicos D, Mathis C, Laporte C, Perna S, Plouvier E, Thuillier F, Forceville X. P118 La supplémentation protéique et calorique du petit déjeuner améliore-t-elle l’état nutritionnel des patients hospitalisés ? NUTR CLIN METAB 2011. [DOI: 10.1016/s0985-0562(11)70185-6] [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]
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Jannes G, Piquet R, Maïssa P, Mathis C, Rousseaux G. Experimental demonstration of the supersonic-subsonic bifurcation in the circular jump: a hydrodynamic white hole. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 83:056312. [PMID: 21728652 DOI: 10.1103/physreve.83.056312] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 02/17/2011] [Indexed: 05/31/2023]
Abstract
We provide an experimental demonstration that the circular hydraulic jump represents a hydrodynamic white hole or gravitational fountain (the time reverse of a black hole) by measuring the angle of the Mach cone created by an object in the "supersonic" inner flow region. We emphasize the general character of this gravitational analogy by showing theoretically that the white hole horizon constitutes a stationary and spatial saddle-node bifurcation within dynamical-systems theory. We also demonstrate that the inner region has a "superluminal" dispersion relation, that is, that the group velocity of the surface waves increases with frequency, and discuss some possible consequences with respect to the robustness of Hawking radiation. Finally, we point out that our experiment shows a concrete example of a possible "trans-Planckian distortion" of black or white holes.
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Affiliation(s)
- G Jannes
- Université de Nice Sophia Antipolis, Laboratoire J.-A. Dieudonné, UMR CNRS-UNS 6621, Parc Valrose, F-06108 Nice Cedex 02, France
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Abstract
G protein-coupled receptor (GPCR) associated sorting protein-1 (GASP-1) is suspected to play a key role in recycling and degradation of several GPCRs. In a previous study, we have shown that GASP-1-knock-out (GASP-1-KO) mice displayed deficits in acquiring a cocaine self-administration task, associated with an exacerbated down-regulation of striatal dopaminergic and cholinergic receptors. Among several possibilities, GASP-1 deficiency could have impaired memory processes underlying the acquisition of the operant conditioning task. Therefore, the present study investigated cognitive performances of GASP-1-KO mice and their wild-type littermates (WT) in a broad variety of memory tasks. Consistent with a deficit in procedural memory, GASP-1-KO mice showed delayed acquisition of a food-reinforced bar-press task. During water-maze training in hidden- or visible-platform paradigms, mutant and WT mice acquired the tasks at the same rate. However, GASP-1 mice exhibited persistent thigmotaxic swimming, longer distance to the platform, and reduced swim speed. There was no deficit in several tasks requiring simple behavioral responses (Barnes maze, object recognition and passive avoidance tasks). Thus, the ability to acquire and/or express complex responses seems affected in GASP-1-deficient mice. Hippocampal functions were preserved, as the retention of an acquired memory in spatial tasks remained unaffected. The pattern of behavioral deficits observed in GASP-1-KO mice is coherent with current knowledge on the role of striatal GPCRs in acquisition/expression of skilled behavior and in motivation. Together with the previous findings, the so far established phenotype of GASP-1-KO mice makes them a potentially exciting tool to study striatal functions.
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Affiliation(s)
- C Mathis
- Laboratoire d'Imagerie et de Neurosciences Cognitives, FRE 3289 Université de Strasbourg-CNRS, IFR 37 de Neurosciences, GDR 2905 CNRS, 12 rue Goethe, Strasbourg, France.
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Yoshikawa HN, Mathis C, Maïssa P, Rousseaux G, Douady S. Pattern formation in bubbles emerging periodically from a liquid free surface. Eur Phys J E Soft Matter 2010; 33:11-18. [PMID: 20848154 DOI: 10.1140/epje/i2010-10645-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Accepted: 07/21/2010] [Indexed: 05/29/2023]
Abstract
Patterns formed by centimeter scale bubbles on the free surface of a viscous liquid are investigated in a cylindrical container. These bubbles emerge periodically at the surface and interact with each other in the central zone. Their radial emission, due to interaction and radial surface flow, leads to the formation of a variety of patterns. Different star-like and spiral patterns appear spontaneously by increasing the bubble emergence frequency. It is found that these patterns are due to a constant angular shift in the bubble emission direction. Measurements of this angular shift show a supercritical bifurcation accompanied by a transition from a pattern of two opposed straight arms to spiral patterns. By applying the tools and concepts from the study of leaf arrangement in botany (phyllotaxis), the recognized patterns and the mechanism of the pattern formation are discussed. Close similarities to the leaf arrangement are found in the behavior of the angular shift and the patterns. These findings suggest that the observed patterns are formed by a packing mechanism of successively appearing elements (bubbles), which is similar to that of the leaves at the earliest stage of phyllotaxis.
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Affiliation(s)
- H N Yoshikawa
- Laboratoire J.-A. Dieudonné, UMR 6621 CNRS/Université de Nice-Sophia Antipolis, Parc Valrose, 06108 Nice Cedex 02, France.
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Pozdnyakov O, Pozdnyakov A, Schmaltz B, Mathis C. Thermal degradation in bulk and thin films of 2-, 4-, and 6-arm polystyrene stars with a C60 core. POLYMER 2006. [DOI: 10.1016/j.polymer.2005.12.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Crowell MD, Mathis C, Schettler VA, Yunus T, Lacy BE. The effects of tegaserod, a 5-HT receptor agonist, on gastric emptying in a murine model of diabetes mellitus. Neurogastroenterol Motil 2005; 17:738-43. [PMID: 16185313 DOI: 10.1111/j.1365-2982.2005.00681.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [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] [Indexed: 02/08/2023]
Abstract
UNLABELLED The C57BLKS/J db/db transgenic mouse is a model of diabetes mellitus that has been shown to have delayed gastric emptying. We assessed gastric emptying rates in C57BLKS/J mice, and determined the effects of tegaserod, a new selective 5-HT(4) receptor partial agonist, on gastric emptying. METHODS Gastric emptying rates of a 20% glucose test meal were determined in 12-20-week-old female db/db mice and control littermates. The effects of tegaserod (0.1-2.0 mg kg(-1), i.p.) on gastric transit were tested in a second group of db/db mice. Pretreatment with GR11308, a specific 5-HT(4)antagonist, was used to confirm the mechanism of action of tegaserod on gastric emptying. RESULTS Gastric emptying of glucose was significantly slower in db/db mice than in control littermates. Tegaserod (0.1 mg kg(-1)) significantly accelerated the gastric emptying rate of glucose in db/db mice, reducing the fraction of the meal remaining in the stomach at 30 min by 80%. GR11308 blocked the gastrokinetic effects of tegaserod. CONCLUSIONS Gastric emptying was impaired in db/db mice. Low dose tegaserod improved gastric emptying rates in this model of gastroparesis through the activation of 5-HT(4) receptors. These findings suggest that 5-HT(4) receptor agonists may prove useful for improving delayed gastric emptying in gastroparesis.
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Affiliation(s)
- M D Crowell
- The Marvin M. Schuster Center for Digestive and Motility Disorders, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Pirat C, Mathis C, Maïssa P, Gil L. Structures of a continuously fed two-dimensional viscous film under a destabilizing gravitational force. Phys Rev Lett 2004; 92:104501. [PMID: 15089210 DOI: 10.1103/physrevlett.92.104501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2003] [Indexed: 05/24/2023]
Abstract
We study the gravity induced instability of a liquid film formed below a plane grid which is used as a porous media in an original hydrodynamic experiment. The film is continuously supplied with a controlled flow rate. We give through a phase diagram the full spectrum of the different flow regimes and we investigate the dynamics of the observed structures. True secondary instabilities of a 2D periodic pattern are described. The control parameters are the flow rate and the viscosity.
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Affiliation(s)
- C Pirat
- Institut du Non Linéaire de Nice (UMR CNRS 6618), Université de Nice Sophia Antipolis, 1361 Route des Lucioles, F-06560 Valbonne, France.
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31
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Bullinger M, Morfeld M, Kohlmann T, Nantke J, van den Bussche H, Dodt B, Dunkelberg S, Kirchberger I, Krüger-Bödecker A, Lachmann A, Lang K, Mathis C, Mittag O, Peters A, Raspe HH, Schulz H. [SF-36 Health Survey in Rehabilitation Research. Findings from the North German Network for Rehabilitation Research, NVRF, within the rehabilitation research funding program]. Rehabilitation (Stuttg) 2003; 42:218-25. [PMID: 12938044 DOI: 10.1055/s-2003-41645] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The SF-36 Health Survey and its 12-item abridged form is an instrument for the assessment of health related quality of life that can be used with healthy persons and patient populations. Its use has been recommended within a large German multicentre rehabilitation research programme. The paper examines missing data across all five study projects of the North German Network for Rehabilitation Research (NVRF) as well as psychometric properties of the instrument. In addition, data were compared to representative norm data using the SF-36 (SF-12) in the German National Health Survey. Results showed that there were few missing data in the SF-36. Examining the impact of age, gender and health status yielded effects of higher age and female gender on missing data. Psychometric analyses showed good to excellent results of the instrument in terms of scale fit and reliability. In terms of convergent validity, medium to high correlation of the SF-36 subscales with comparable instruments (e. g. SCL-90-R) could be found. Summarizing, the SF-36/SF-12 can be recommended for use in rehabilitation research. Analyses regarding sensitivity should be conducted in future studies.
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Affiliation(s)
- M Bullinger
- Arbeitsgruppe Lebensqualitätsforschung bei Erwachsenen und Kindern, Institut und Poliklinik für Medizinische Psychologie, Zentrum für Psychosoziale Medizin, Universitätsklinikum Hamburg-Eppendorf.
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Abstract
Small animal models that manifest many of the characteristic neuropathological and behavioral features of Alzheimer's disease (AD) have been developed and have proven of great value for studying the pathogenesis of this disorder at the molecular, cellular and behavioral levels. The great progress made in our understanding of the genetic factors that either cause or contribute to the risk of developing AD has prompted many laboratories to create transgenic (tg) mice that overexpress specific genes which cause familial forms of the disease. Several of these tg mice display neuropathological and behavioral features of AD including amyloid beta-peptide (A beta) and amyloid deposits, neuritic plaques, gliosis, synaptic alterations and signs of neurodegeneration as well as memory impairment. Despite these similarities, important differences in neuropathology and behavior between these tg mouse models and AD have also been observed, and to date no perfect animal model has emerged. Moreover, ascertaining which elements of the neuropathological and behavioral phenotype of these various strains of tg mice are relevant to that observed in AD continues to be a challenge. Here we provide a critical review of the AD-like neuropathology and behavioral phenotypes of several well-known and utilized tg mice that express human APP transgenes.
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Affiliation(s)
- J C Dodart
- Neuroscience Discovery Research, Eli Lilly and Company, Indianapolis, IN 46285, USA.
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33
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Schikowski A, Thewissen M, Mathis C, Ross HG, Enck P. Serotonin type-4 receptors modulate the sensitivity of intramural mechanoreceptive afferents of the cat rectum. Neurogastroenterol Motil 2002; 14:221-7. [PMID: 12061906 DOI: 10.1046/j.1365-2982.2002.00328.x] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [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] [Indexed: 02/07/2023]
Abstract
It has been suggested that serotonin (5-hydroxytryptamine) type-4 (5-HT4) receptors modulate the sensitivity of intrinsic afferents of the intestinal mucosa. We studied the involvement of 5-HT4receptors in the modulation of extrinsic afferent sensitivity of the intestinal wall. During distension ramps, mechanoreceptive rectal afferents in sacral dorsal roots were examined in decerebrate anaesthesia-free cats using the selective 5-HT4receptor partial agonist, tegaserod (HTF 919), and the 5-HT4receptor antagonist, SB 203186. The static discharge rate of the afferents evoked by rectal distension decreased after intravenous (i.v.) administration of tegaserod at intraluminal pressures above 30 mmHg, with the most effective reduction occurring at 50 mmHg. The effect was dose-dependent, with maximal reduction occurring at 1.2 mg kg-1 bodyweight, and could be partly reversed by i.v. administration of SB 203186. Tegaserod did not alter the pressure-volume relationship (compliance) of the rectum. It is tentatively concluded that 5-HT4receptor activation has an inhibitory effect on intramural mechanoreceptors in the cat's rectum. Our results are in line with the observation that tegaserod relieves the sensory symptoms of patients suffering from irritable bowel syndrome.
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Affiliation(s)
- A Schikowski
- Physiologisches Institut, Heinrich-Heine-Universität, Düsseldorf, Germany
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Venturini J, Koudoumas E, Couris S, Janot JM, Seta P, Mathis C, Leach S. Optical limiting and nonlinear optical absorption properties of C60–polystyrene star polymer films: C60 concentration dependence. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b201308h] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mathis C, Hogen-Esch TE. Oligomerization of Vinyl Monomers. 2. Evidence for a conformationally restrained six-membered ring containing lithium ion. J Am Chem Soc 2002. [DOI: 10.1021/ja00366a053] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mathis C, Denisenko-Nehrbass N, Girault JA, Borrelli E. Essential role of oligodendrocytes in the formation and maintenance of central nervous system nodal regions. Development 2001; 128:4881-90. [PMID: 11731467 DOI: 10.1242/dev.128.23.4881] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [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: 11/20/2022]
Abstract
The membrane of myelinated axons is divided into functionally distinct domains characterized by the enrichment of specific proteins. The mechanisms responsible for this organization have not been fully identified. To further address the role of oligodendrocytes in the functional segmentation of the axolemma in vivo, the distribution of nodal (Na+ channels, ankyrin G), paranodal (paranodin/contactin-associated-protein) and juxtaparanodal (Kv1.1 K+ channels) axonal markers, was studied in the brain of MBP-TK and jimpy mice. In MBP-TK transgenic mice, oligodendrocyte ablation was selectively induced by FIAU treatment before and during the onset of myelination. In jimpy mice, oligodendrocytes degenerate spontaneously within the first postnatal weeks after the onset of myelination. Interestingly, in MBP-TK mice treated for 1-20 days with FIAU, despite the ablation of more than 95% of oligodendrocytes, the protein levels of all tested nodal markers was unaltered. Nevertheless, these proteins failed to cluster in the nodal regions. By contrast, in jimpy mice, despite a diffused localization of paranodin, the formation of nodal clusters of Na+ channels and ankyrin G was observed. Furthermore, K+ channels clusters were transiently visible, but were in direct contact with nodal markers. These results demonstrate that the organization of functional domains in myelinated axons is oligodendrocyte dependent. They also show that the presence of these cells is a requirement for the maintenance of nodal and paranodal regions.
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Affiliation(s)
- C Mathis
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM/CNRS/ULP, BP 163, 67404 Illkirch Cedex, C.U. de Strasbourg, France
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Koudoumas E, Konstantaki M, Mavromanolakis A, Couris S, Ederle Y, Mathis C, Seta P, Leach S. Ultrafast nonlinear optical response of C60–polystyrene star polymers. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00088-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mathis C, Hindelang C, LeMeur M, Borrelli E. A transgenic mouse model for inducible and reversible dysmyelination. J Neurosci 2000; 20:7698-705. [PMID: 11027231 PMCID: PMC6772884] [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] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Oligodendrocytes are glial cells devoted to the production of myelin sheaths. Myelination of the CNS occurs essentially after birth. To delineate both the times of oligodendrocyte proliferation and myelination, as well as to study the consequence of dysmyelination in vivo, a model of inducible dysmyelination was developed. To achieve oligodendrocyte ablation, transgenic animals were generated that express the herpes virus 1 thymidine kinase (HSV1-TK) gene under the control of the myelin basic protein (MBP) gene promoter. The expression of the MBP-TK transgene in oligodendrocytes is not toxic on its own; however, toxicity can be selectively induced by the systemic injection of animals with nucleoside analogs, such as FIAU [1-(2-deoxy-2-fluoro-beta-delta-arabinofuranosyl)-5-iodouracil]. This system allows us to control the precise duration of the toxic insult and the degree of ablation of oligodendrocytes in vivo. We show that chronic treatment of MBP-TK mice with FIAU during the first 3 postnatal weeks triggers almost a total depletion of oligodendrocytes in the CNS. These effects are accompanied by a behavioral phenotype characterized by tremors, seizures, retarded growth, and premature animal death. We identify the period of highest oligodendrocytes division in the first 9 postnatal days. Delaying the beginning of FIAU treatments results in different degrees of dysmyelination. Dysmyelination in MBP-TK mice is always accompanied by astrocytosis. Thus, this transgenic line provides a model to study the events occurring during dysmyelination of various intensities. It also represents an invaluable tool to investigate remyelination in vivo.
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Affiliation(s)
- C Mathis
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, National de la Recherche Scientifique/Université Louis Pasteur, 67404 Illkirch Cedex, France
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Abstract
Regional 5-hydroxytryptamine(1A) (5-HT(1A)) receptor binding potential (BP) of depressed subjects with primary, recurrent, familial mood disorders was compared to that of healthy controls by using positron emission tomography and [carbonyl-(11)C]WAY-100635 ¿[(11)C]N-(2-(4-(2-methoxyphenyl)-1-piperazin-1-yl)ethyl)-N-(2- pyridy l)cyclohexanecarboxamide¿. The mean 5-HT(1A) receptor BP was reduced 42% in the midbrain raphe and 25-33% in limbic and neocortical areas in the mesiotemporal, occipital, and parietal cortex. The magnitude of these abnormalities was most prominent in bipolar depressives and unipolar depressives who had bipolar relatives. These abnormal reductions in 5-HT(1A) receptor BP are consistent with in vivo evidence that 5-HT(1A) receptor sensitivity is reduced in major depressive disorder and postmortem data showing a widespread deficit of 5-HT(1A) receptor expression in primary mood disorders.
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Affiliation(s)
- W C Drevets
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
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41
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Abstract
Intensive investigation towards the understanding of the biology and physiological functions of the beta-amyloid precursor protein (APP) have been supported since it is known that a 39-43 amino acid fragment of APP, called the beta-amyloid protein (Abeta), accumulates in the brain parenchyma to form the typical lesions associated with Alzheimer's disease (AD). It emerges from extensive data that APP and its derivatives show a wide range of contrasting physiological properties and therefore might be involved in distinct physiological functions. Abeta has been shown to disrupt neuronal activity and to demonstrate neurotoxic properties in a wide range of experimental procedures. In contrast, both in vitro and in vivo studies suggest that APP and/or its secreted forms are important factors involved in the viability, growth and morphological and functional plasticity of nerve cells. Furthermore, several recent studies suggest that APP and its derivatives have an important role in learning and memory processes. Memory impairments can be induced in animals by intracerebral treatment with Abeta. Altered expression of the APP gene in aged animals or in genetically-modified animals also leads to memory deficits. By contrast, secreted forms of APP have recently been shown to facilitate learning and memory processes in mice. These interesting findings open novel perspectives to understand the involvement of APP in the development of cognitive deficits associated with AD. In this review, we summarize the current data concerning the biology and the behavioral effects of APP and its derivatives which may be relevant to the roles of these proteins in memory and in AD pathology.
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Affiliation(s)
- J C Dodart
- Laboratoire d'Ethologie et Neurobiologie, URA-CNRS 1295, ULP, Strasbourg, France.
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Dodart JC, Mathis C, Saura J, Bales KR, Paul SM, Ungerer A. Neuroanatomical abnormalities in behaviorally characterized APP(V717F) transgenic mice. Neurobiol Dis 2000; 7:71-85. [PMID: 10783292 DOI: 10.1006/nbdi.1999.0278] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.9] [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: 11/22/2022] Open
Abstract
Histological analyses were performed on the brains of APP(V717F) transgenic (Tg)mice previously studied in a battery of behavioral tests. We describe here the regional and age-dependent deposition of amyloid in both heterozygous and homozygous Tg mice. We also report that Tg mice show significant and age-dependent changes in synaptic density measured by synaptophysin immunoreactivity. Surprisingly, a rather marked hippocampal atrophy is observed as early as 3 months of age in Tg mice (20-40%). Statistical analyses revealed that the deficits in object recognition memory are related to the number of amyloid deposits in specific brain regions, whereas deficits in spatial reference and working memory are related to the changes in synaptic density and hippocampal atrophy. Our study suggests that the behavioral deficits observed in Tg mice are only in part related to amyloid deposition, but are also related to neuroanatomical alterations secondary to overexpression of the APP(V717F) transgene and independent of amyloid deposition.
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Affiliation(s)
- J C Dodart
- ULP, URA-CNRS 1295, 7 Rue de l'Université, Strasbourg, France
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Abstract
Both the beta-amyloid precursor protein (APP) and the apoliprotein E (apoE) genes are involved in the pathogenesis of Alzheimer's disease (AD). We previously showed that mice over-expressing a human mutated form of APP (APP(V717F)) display age-dependent recognition memory deficits associated with the progression of amyloid deposition. Here, we asked whether 10- to 12-month-old APP(V717F) mice lacking the apoE gene, which do not present obvious amyloid deposition, differ from APP(V717F) mice in the object recognition task. The recognition performance is decreased in both transgenic mouse groups compared to control groups. Moreover, some behavioral disturbances displayed by APP mice lacking apoE are even more pronounced than those of APP mice expressing apoE. Our results suggest that the recognition memory deficits are related to high levels of soluble Abeta rather than to amyloid deposits.
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Affiliation(s)
- J C Dodart
- Laboratoire d'Ethologie et Neurobiologie, Université Louis Pasteur, URA 1295 CNRS, Strasbourg, France
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Dodart JC, Mathis C, Bales KR, Paul SM, Ungerer A. Early regional cerebral glucose hypometabolism in transgenic mice overexpressing the V717F beta-amyloid precursor protein. Neurosci Lett 1999; 277:49-52. [PMID: 10643895 DOI: 10.1016/s0304-3940(99)00847-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [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: 10/17/2022]
Abstract
In the present study, we examined whether the relative levels of regional brain [14C]2-deoxyglucose (2-DG) uptake are altered in a transgenic mouse model of Alzheimer's disease which overexpresses a mutated form of the human beta-amyloid precursor protein (mutation V717F). We show that the relative levels of 2-DG uptake are significantly reduced in the septum, thalamus, dentate gyrus and parietal cortex of 3-month-old transgenic mice as compared with wild-type littermates. In 10-month-old transgenic mice, these alterations also extend to the CA3 hippocampal region, the cingulate, retrosplenial, occipital and temporal cortices, suggesting an age-dependent decrease in the regional 2-DG uptake. These results suggest that expression of a mutated APP gene induces an early regional cerebral hypometabolism independently of amyloid deposition per se.
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Affiliation(s)
- J C Dodart
- Laboratoire d'Ethologie et Neurobiologie, Université Louis Pasteur, URA 1295 CNRS, Strasbourg, France.
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Dodart JC, Meziane H, Mathis C, Bales KR, Paul SM, Ungerer A. Behavioral disturbances in transgenic mice overexpressing the V717F beta-amyloid precursor protein. Behav Neurosci 1999. [PMID: 10571480 DOI: 10.1037//0735-7044.113.5.982] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
PDAPP transgenic mice have been shown to develop age dependently much of the cerebral histopathology associated with Alzheimer's disease. PDAPP mice (3-10 months old) were tested in a battery of memory tasks to determine whether they develop memory-behavioral deficits and whether these deficits occur before or after amyloid deposition. PDAPP mice manifest robust impairments in a radial-maze spatial discrimination task at all ages tested. Mild deficits were observed in a barpress learning task in 3-month-old PDAPP mice. In contrast, PDAPP mice show an age-dependent decrease in spontaneous object-recognition performance that appears to be severe at ages when amyloid deposition is known to occur. Thus, the PDAPP mouse shows severe deficits in the radial maze well before amyloid plaque deposition, whereas object-recognition performance decreases with age and may be associated with amyloid deposition.
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Affiliation(s)
- J C Dodart
- Centre National de Recherche Scientifique, Université Louis Pasteur, Strasbourg, France.
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Drevets WC, Price JC, Kupfer DJ, Kinahan PE, Lopresti B, Holt D, Mathis C. PET measures of amphetamine-induced dopamine release in ventral versus dorsal striatum. Neuropsychopharmacology 1999; 21:694-709. [PMID: 10633475 DOI: 10.1016/s0893-133x(99)00079-2] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.6] [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] [Indexed: 11/18/2022]
Abstract
Regional differences in dextroamphetamine (AMPH)-induced dopamine (DA) release in the baboon striatum were assessed using positron emission tomographic (PET) measures of [11C]raclopride specific binding to DA D2/D3 receptors acquired before and after AMPH administration. The magnitude of the reduction in [11C]raclopride binding, following AMPH administration, was two-fold greater in the anteroventral striatum (comprised of ventral caudate, anteroventral putamen, and nucleus accumbens) than the dorsal striatum (dorsal caudate). A simulation study demonstrated that any potential biases due to resolution (partial volume) and alignment effects were significantly smaller than the magnitude of the observed results. These regional differences in the sensitivity of AMPH are compatible with microdialysis evidence in rats indicating that the magnitude of DA release in response to AMPH concentrations in the range tested is greater in ventral than dorsal striatal regions. Post hoc tests involving measures in other striatal regions showed that the baseline DA D2/D3 binding was highest and the correlation between AMPH dose and change in [11C]raclopride binding most significant in the putamen.
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Affiliation(s)
- W C Drevets
- Department of Psychiatry, University of Pittsburgh School of Medicine, PA 15213, USA
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Abstract
BACKGROUND The serotonin-1A (5HT1A) receptor system has been implicated in the pathophysiology of major depression by postmortem studies of suicide victims and depressed subjects dying of natural causes. This literature is in disagreement, however, regarding the brain regions where 5HT1A receptor binding differs between depressives and controls and the direction of such differences relative to the normal baseline, possibly reflecting the diagnostic heterogeneity inherent within suicide samples. PET imaging using the 5HT1A receptor radioligand, [11C]WAY-100635, may clarify the clinical conditions under which 5HT1A receptor binding potential (BP) is abnormal in depression. METHODS Regional 5HT1A receptor BP values were compared between 12 unmedicated depressives with primary, recurrent, familial mood disorders and 8 healthy controls using PET and [carbonyl-11C]WAY-100635. Regions-of-interest (ROI) assessed were the mesiotemporal cortex (hippocampus-amygdala) and midbrain raphe, where previous postmortem studies suggested 5HT1A receptor binding is abnormal in depression. RESULTS The mean 5HT1A receptor BP was reduced 41.5% in the raphe (p < .02) and 26.8% in the mesiotemporal cortex (p < .025) in the depressives relative to the controls. Post hoc comparisons showed the abnormal reduction in 5HT1A receptor BP was not limited to these regions, but extended to control ROI in the occipital cortex and postcentral gyrus as well. The magnitude of these abnormalities was most prominent in bipolar depressives (n = 4) and unipolar depressives with bipolar relatives (n = 4). CONCLUSIONS Serotonin-1A receptor BP is abnormally decreased in the depressed phase of familial mood disorders in multiple brain regions. Of the regions tested, the magnitude of this reduction was most prominent in the midbrain raphe. Converging evidence from postmortem studies of mood disorders suggests these reductions of 5HT1A receptor BP may be associated with histopathological changes involving the raphe.
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Affiliation(s)
- W C Drevets
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pennsylvania, USA
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Mathis C, Ungerer A. The retention deficit induced by (RS)-alpha-methyl-4-carboxyphenylglycine in a lever-press learning task is blocked by selective agonists of either group I or group II metabotropic glutamate receptors. Exp Brain Res 1999; 129:147-55. [PMID: 10550512 DOI: 10.1007/s002210050945] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 11/28/2022]
Abstract
The effects of immediate post-training administration of drugs interacting with group I and/or group II glutamate metabotropic receptors (mGluRs) were determined on the retention performance of a partially acquired lever-press learning task in mice. The antagonist (RS)-alpha-methyl-4-carboxyphenylglycine (MCPG) dose-dependently (0. 1-100 nmol/mouse, i.c.v.) impairs the retention performance evaluated 24 h post-training. The retention deficit induced by 100 nmol MCPG is related to the selective suppression of a time-dependent spontaneous improvement of performance between the two sessions. This phenomenon appears progressively within 24 h post-training in control mice and is thought to reflect post-training processing of memory traces. The coadministration of either (1S,3R)-1-aminocyclopentane-1,3-dicarboxylic acid (ACPD), the group I mGluR agonist (R,S)3,5-dihydroxyphenylglycine (DHPG), or the group II mGluR agonist LY354740, completely blocked MCPG-induced deficits at a dose of 0.1 nmol for each agonist. These results suggest that selective activation of either group I or group II mGluRs is able to prevent the memory retention deficits induced by MCPG.
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Affiliation(s)
- C Mathis
- Laboratoire d'Ethologie et de Neurobiologie, URA 1295, Université Louis Pasteur, 7 rue de l'Université, F-67000 Strasbourg, France.
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Mathis C, Meziane H, Ungerer A. [Models for the study of memory and neurosteroids]. J Soc Biol 1999; 193:299-306. [PMID: 10542961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
The steroids dehydroepiandrosterone sulfate (DHEA-S) and pregnenolone sulfate (Preg-S) are naturally synthetized in the brain. They improve short term and long term memory performances in a variety of learning tasks and models of amnesia in rodents. DHEA-S and Preg-S modulate GABAergic and glutamatergic synaptic transmission through direct interactions with GABA-A, NMDA and/or sigma 1 membrane receptors. In addition, these two neurosteroids facilitate the release of acetylcholine and modulate synaptic plasticity phenomena in cerebral structures, such as the hippocampus, known to play a role in learning and memory processes. The possible links between these actions and the promnestic effects of DHEA-S and Preg-S are discussed in the present review.
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Affiliation(s)
- C Mathis
- Laboratoire d'Ethologie et de Neurobiologie, URA 1295 CNRS, Université Louis Pasteur, Strasbourg, France.
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