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Barat M, Duran J, Sung K, Brown M, Lin A, King K, Adler E, Aslam S. Breakthrough Infections and Low Mortality Observed in Heart Transplant Recipients Infected with COVID-19 at UC San Diego. J Heart Lung Transplant 2022. [PMCID: PMC8988601 DOI: 10.1016/j.healun.2022.01.805] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Purpose Methods Results Conclusion
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Cruz Rodriguez J, Barat M, Adler E, Urey M. Characteristics and Outcomes of Patients with Cardiac Amyloidosis Requiring Orthotopic Heart Transplantation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1662] [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] Open
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Barat M, Rodriguez JBC, Mariski M, Adler E, Urey M. Amyloid-Targeted Immunosuppression After Orthotopic Heart Transplantation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1408] [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: 10/18/2022] Open
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Malgras B, Najah H, Dohan A, Barat M, Soyer P. Diagnosis and treatment of focal splenic lesions. J Visc Surg 2022; 159:121-135. [DOI: 10.1016/j.jviscsurg.2021.11.010] [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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Barat M, Lin A, Lin G, Pretorius V, Adler E. Giant Cell Myocarditis after Orthotopic Heart Transplant. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1997] [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] Open
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Aldhaheri R, Barat M, Dohan A, Gaujoux S, Coriat R, Terris B, Soyer P. Imaging features of undifferentiated carcinoma with osteoclastic giant cells of the pancreas. Diagn Interv Imaging 2020; 101:839-841. [PMID: 32307282 DOI: 10.1016/j.diii.2020.03.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 03/29/2020] [Accepted: 03/31/2020] [Indexed: 10/24/2022]
Affiliation(s)
- R Aldhaheri
- Department of Radiology, Hôpital Cochin, AP-HP, 27, rue du Faubourg Saint-Jacques, 75014 Paris, France
| | - M Barat
- Department of Radiology, Hôpital Cochin, AP-HP, 27, rue du Faubourg Saint-Jacques, 75014 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France.
| | - A Dohan
- Department of Radiology, Hôpital Cochin, AP-HP, 27, rue du Faubourg Saint-Jacques, 75014 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France
| | - S Gaujoux
- Université de Paris, Descartes-Paris 5, 75006 Paris, France; Department of Abdominal Surgery, Hôpital Cochin, Assistance Publique-Hopitaux de Paris, 75014 Paris, France
| | - R Coriat
- Université de Paris, Descartes-Paris 5, 75006 Paris, France; Department of Gastroenterology, Hôpital Cochin, Assistance Publique-Hopitaux de Paris, 75014 Paris, France
| | - B Terris
- Université de Paris, Descartes-Paris 5, 75006 Paris, France; Department of Pathology, Hôpital Cochin, Assistance Publique-Hopitaux de Paris, 75014 Paris, France
| | - P Soyer
- Department of Radiology, Hôpital Cochin, AP-HP, 27, rue du Faubourg Saint-Jacques, 75014 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France
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Barat M, Dohan A, Gaujoux S, Hoeffel C, Jornet D, Oudjit A, Coriat R, Barret M, Terris B, Soyer P. Computed tomography features of acinar cell carcinoma of the pancreas. Diagn Interv Imaging 2020; 101:565-575. [PMID: 32146131 DOI: 10.1016/j.diii.2020.02.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 01/23/2020] [Revised: 02/12/2020] [Accepted: 02/12/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE To report the computed tomography (CT) features of pancreatic acinar cell carcinoma (ACC) and identify CT features that may help discriminate between pancreatic ACC and pancreatic ductal adenocarcinoma (PDA). MATERIALS AND METHODS The CT examinations of 20 patients (13 men, 7 women; mean age, 66.5±10.7 [SD] years; range: 51-88 years) with 20 histopathologically proven pancreatic ACC were reviewed. CT images were analyzed qualitatively and quantitatively and compared to those obtained in 20 patients with PDA. Comparisons were performed using univariate analysis with a conditional logistic regression model. RESULTS Pancreatic ACC presented as an enhancing (20/20; 100%), oval (15/20; 75%), well-delineated (14/20; 70%) and purely solid (13/20; 65%) pancreatic mass with a mean diameter of 52.6±28.0 (SD) mm (range: 24-120mm) in association with visible lymph nodes (14/20; 70%). At univariate analysis, well-defined margins (Odds ratio [OR], 7.00; P=0.005), nondilated bile ducts (OR, 9.00; P=0.007), visible lymph nodes (OR, 4.33; P=0.028) and adjacent organ involvement (OR, 5.67; P=0.02) were the most discriminating CT features to differentiate pancreatic ACC from PDA. When present, lymph nodes were larger in patients with pancreatic ACC (14±4.8 [SD]; range: 7-25mm) than in those with PDA (8.8±4.1 [SD]; range: 5-15mm) (P=0.039). CONCLUSION On CT, pancreatic ACC presents as an enhancing, predominantly oval and purely solid pancreatic mass that most frequently present with no bile duct dilatation, no visible lymph nodes, no adjacent organ involvement and larger visible lymph nodes compared to PDA.
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Affiliation(s)
- M Barat
- Department of Radiology, Hôpital Cochin, AP-HP, 75014 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France.
| | - A Dohan
- Department of Radiology, Hôpital Cochin, AP-HP, 75014 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France
| | - S Gaujoux
- Université de Paris, Descartes-Paris 5, 75006 Paris, France; Department of Abdominal Surgery, Hôpital Cochin, AP-HP, 75014 Paris, France
| | - C Hoeffel
- Department of Radiology, Hôpital Robert Debré, 51092 Reims, France
| | - D Jornet
- Department of Radiology, Hôpital Cochin, AP-HP, 75014 Paris, France
| | - A Oudjit
- Department of Radiology, Hôpital Cochin, AP-HP, 75014 Paris, France
| | - R Coriat
- Université de Paris, Descartes-Paris 5, 75006 Paris, France; Department of Gastroenterology, Hôpital Cochin, AP-HP, 75014 Paris, France
| | - M Barret
- Université de Paris, Descartes-Paris 5, 75006 Paris, France; Department of Gastroenterology, Hôpital Cochin, AP-HP, 75014 Paris, France
| | - B Terris
- Université de Paris, Descartes-Paris 5, 75006 Paris, France; Department of Pathology, Hôpital Cochin, AP-HP, 75014 Paris, France
| | - P Soyer
- Department of Radiology, Hôpital Cochin, AP-HP, 75014 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France
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Nguyen TTL, Terris B, Barat M. Hepatic epithelioid angiomyolipoma mimicking hepatocellular carcinoma. Diagn Interv Imaging 2020; 101:501-503. [PMID: 32122801 DOI: 10.1016/j.diii.2020.01.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 01/25/2020] [Indexed: 02/08/2023]
Affiliation(s)
- T T L Nguyen
- Department of Radiology, Hôpital Cochin, AP-HP, 75014 Paris, France
| | - B Terris
- Department of Pathology, Hôpital Cochin, AP-HP, 75014 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France
| | - M Barat
- Department of Radiology, Hôpital Cochin, AP-HP, 75014 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France.
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Barat M, Paisant A, Calame P, Purcell Y, Lagadec M, Curac S, Zappa M, Vilgrain V, Ronot M. Unenhanced CT for clinical triage of elderly patients presenting to the emergency department with acute abdominal pain. Diagn Interv Imaging 2019; 100:709-719. [DOI: 10.1016/j.diii.2019.05.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 04/28/2019] [Accepted: 05/18/2019] [Indexed: 02/06/2023]
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Barat M, Tselikas L, de Baère T, Gravel G, Yevich S, Delpla A, Magand N, Louvel G, Hadoux J, Berdelou A, Terroir M, Baudin E, Schlumberger M, Leboulleux S, Deschamps F. Corrigendum to "Thermal-ablation of vertebral metastases prevents adverse events in patients with differentiated thyroid carcinoma" [Eur. J. Radiol. 119 (2019) 108650]. Eur J Radiol 2019; 121:108693. [PMID: 31594669 DOI: 10.1016/j.ejrad.2019.108693] [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: 11/29/2022]
Affiliation(s)
- M Barat
- Department of Interventional Radiology, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France.
| | - L Tselikas
- Department of Interventional Radiology, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France
| | - T de Baère
- Department of Interventional Radiology, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France
| | - G Gravel
- Department of Interventional Radiology, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France
| | - S Yevich
- Department of Interventional Radiology, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France
| | - A Delpla
- Department of Interventional Radiology, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France
| | - N Magand
- Department of Interventional Radiology, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France
| | - G Louvel
- Department of Radiotherapy, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France
| | - J Hadoux
- Department of Nuclear Medicine and Endocrine Oncology, Gustave Roussy, Université Paris Saclay, 114 Rue Edouard Vaillant, 94800 Villejuif, France
| | - A Berdelou
- Department of Nuclear Medicine and Endocrine Oncology, Gustave Roussy, Université Paris Saclay, 114 Rue Edouard Vaillant, 94800 Villejuif, France
| | - M Terroir
- Department of Nuclear Medicine and Endocrine Oncology, Gustave Roussy, Université Paris Saclay, 114 Rue Edouard Vaillant, 94800 Villejuif, France
| | - E Baudin
- Department of Nuclear Medicine and Endocrine Oncology, Gustave Roussy, Université Paris Saclay, 114 Rue Edouard Vaillant, 94800 Villejuif, France
| | - M Schlumberger
- Department of Nuclear Medicine and Endocrine Oncology, Gustave Roussy, Université Paris Saclay, 114 Rue Edouard Vaillant, 94800 Villejuif, France
| | - S Leboulleux
- Department of Nuclear Medicine and Endocrine Oncology, Gustave Roussy, Université Paris Saclay, 114 Rue Edouard Vaillant, 94800 Villejuif, France
| | - F Deschamps
- Department of Interventional Radiology, Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France
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Barat M, Colleter L, Mongiat-Artus P, Jolibois Z, Quero L, Hennequin C, Desgrandchamps F, de Kerviler E. Salvage cryoablation for local recurrence of prostatic cancer after curative therapy. Diagn Interv Imaging 2019; 100:679-687. [PMID: 31331832 DOI: 10.1016/j.diii.2019.07.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 06/05/2019] [Revised: 06/27/2019] [Accepted: 07/01/2019] [Indexed: 01/14/2023]
Abstract
PURPOSE The purpose of this study was to determine the efficacy of salvage cryotherapy for intra-prostatic and local extraprostatic recurrences after curative treatment of prostate adenocarcinoma. MATERIAL AND METHOD Twenty-eight men (mean age, 69±6 [SD] years; range: 51-82 years) treated with cryoablation for prostatic (N=21) or extraprostatic (N=7) recurrent prostate cancer after radiotherapy with or without associated prostatectomy were included. Technical success, complication and recurrences were reported. Biological recurrence was defined as an elevation ≥2ng/mL of prostate specific antigen (PSA) serum level after the treatment. RESULTS The mean follow-up was 18 months. Among the 21 patients with intraprostatic recurrence, 14 had successful cryotherapy with a mean decrease in serum prostate-specific antigen (PSA) levels of -5.7±2.6 (SD) ng/mL (range: -2.1 to -16.9ng/mL). Four patients (19%) had early progression and three patients (14%) had delayed biological recurrence (mean time: 15 months). Among the 7 patients with extraprostatic recurrence, 2/7 (291%) had successful cryotherapy with a decrease in PSA serum level of -2.7±1.6 (SD) ng/mL (range: -0.5--5.5ng/mL) and 4/7 (57%) had early biological recurrence after cryotherapy that required androgen deprivation therapy, whereas 1/7 (4%) was lost to follow-up. No major complications were observed for both intra- and extraprostatic recurrence. CONCLUSION Salvage cryoablation of locally recurrent prostate cancer after curative treatment is feasible and safe when the half prostate is treated. It could delay initiation of androgen deprivation therapy in these patients.
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Affiliation(s)
- M Barat
- Department of Radiology, Hôpital Cochin, AP-HP, & Université de Paris-Descartes Paris 5,, 75014 Paris, France.
| | - L Colleter
- Department of Radiology, Hôpital Saint-Louis, APHP & Université de Paris-Diderot Paris 7, 75010 Paris, France
| | - P Mongiat-Artus
- Department of Urology, Hôpital Saint-Louis & Université de Paris-Diderot Paris 7, 75010 Paris, France
| | - Z Jolibois
- Department of Radiology, Hôpital Saint-Louis, APHP & Université de Paris-Diderot Paris 7, 75010 Paris, France
| | - L Quero
- Department of Radiation Oncology, Hôpital Saint-Louis & Université de Paris-Diderot Paris 7, 75010 Paris, France
| | - C Hennequin
- Department of Radiation Oncology, Hôpital Saint-Louis & Université de Paris-Diderot Paris 7, 75010 Paris, France
| | - F Desgrandchamps
- Department of Urology, Hôpital Saint-Louis & Université de Paris-Diderot Paris 7, 75010 Paris, France
| | - E de Kerviler
- Department of Radiology, Hôpital Saint-Louis, APHP & Université de Paris-Diderot Paris 7, 75010 Paris, France
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Barat M, Dohan A, Dautry R, Barral M, Boudiaf M, Hoeffel C, Soyer P. Mass-forming lesions of the duodenum: A pictorial review. Diagn Interv Imaging 2017; 98:663-675. [PMID: 28185840 DOI: 10.1016/j.diii.2017.01.004] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 01/04/2017] [Accepted: 01/05/2017] [Indexed: 02/07/2023]
Abstract
Recent advances in imaging have resulted in marked changes in the investigation of the duodenum, which still remains primarily evaluated with videoendoscopy. However, improvements in computed tomography (CT) and magnetic resonance (MR) imaging have made detection and characterization of duodenal mass-forming abnormalities easier. The goal of this pictorial review was to illustrate the most common conditions of the duodenum that present as mass-forming lesions with a specific emphasis on CT and MR imaging. MR imaging used in conjunction with duodenal distension appears as a second line imaging modality for the characterization of duodenal mass-forming lesions. CT remains the first line imaging modality for the detection and characterization of a wide range of duodenal mass-forming lesions.
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Affiliation(s)
- M Barat
- Department of Radiology, hôpital Lariboisière, 2, rue Ambroise-Paré, 75010 Paris, France.
| | - A Dohan
- Department of Radiology, McGill University Health Centre, Montreal General and Royal Victoria Hospitals, Montreal, Canada.
| | - R Dautry
- Department of Radiology, hôpital Lariboisière, 2, rue Ambroise-Paré, 75010 Paris, France.
| | - M Barral
- Department of Radiology, hôpital Lariboisière, 2, rue Ambroise-Paré, 75010 Paris, France.
| | - M Boudiaf
- Pôle santé du plateau, 3/5, avenue de Villacoublay, 92360 Meudon-La-Forêt, France.
| | - C Hoeffel
- Department of Radiology, hôpital Robert-Debré, 11, boulevard Pasteur, 51092 Reims, France.
| | - P Soyer
- Medicine department, Université Paris-Diderot, Sorbonne Paris Cité, 10, avenue de Verdun, 75010 Paris, France.
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Shotar E, Soyer P, Barat M, Dautry R, Pocard M, Placé V, Camus M, Eveno C, Barret M, Dohan A. Diagnosis of acute overt gastrointestinal bleeding with CT-angiography: Comparison of the diagnostic performance of individual acquisition phases. Diagn Interv Imaging 2017; 98:857-863. [PMID: 28754326 DOI: 10.1016/j.diii.2017.06.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 06/16/2017] [Revised: 06/29/2017] [Accepted: 06/30/2017] [Indexed: 02/06/2023]
Abstract
PURPOSE To compare the respective values of arterial phase, portal venous phase and combination of phases using 64-section multidetector computed tomography (MDCT) for diagnosing acute overt gastrointestinal bleeding (AOGIB). PATIENTS AND METHODS Forty-nine patients with AOGIB were included. There were 30 men and 19 women, with a mean age of 65.4±15.6 (SD) years [range, 34-91years]. Two observers reviewed MDCT examinations in consensus for presence of active bleeding, location of bleeding site and nature of causative lesion. The different acquisition phases were reviewed independently. RESULTS AOGIB was identified in 28/49 patients (57%) with the multiphasic set, in 26/49 patients (53%) with arterial phase and in 25/49 patients (51%) with portal venous phase. Multiphasic set helped locate the bleeding site in 40/49 patients (82%). The cause was elucidated in 23/49 patients (47%) with multiphasic set. The differences between set performances were not statistically significant. Sensitivity for depicting AOGIB with the multiphasic set was 92% and specificity was 76%. CONCLUSION Multiphasic 64-section MDCT has high diagnostic performances in patients with AOGIB. Further studies with a larger population are needed to reach statistical significance and demonstrate better diagnostic performance of multiphasic MDCT in comparison with the arterial or portal phase alone.
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Affiliation(s)
- E Shotar
- Department of Body and Interventional Imaging, hôpital Lariboisière, AP-HP, 2, rue Ambroise Paré, 75475 Paris cedex 10, France
| | - P Soyer
- Université Paris 5, Sorbonne Paris Cité, rue de l'école de médecine, 75006 Paris, France; UMR Inserm 965, hôpital Lariboisière, 2, rue Amboise-Paré, 75010 Paris, France; Department of Radiologie, hôpital Cochin, AP-HP, 27, rue du Faubourg Saint-Jacques, 75014 Paris, France
| | - M Barat
- Department of Body and Interventional Imaging, hôpital Lariboisière, AP-HP, 2, rue Ambroise Paré, 75475 Paris cedex 10, France
| | - R Dautry
- Department of Body and Interventional Imaging, hôpital Lariboisière, AP-HP, 2, rue Ambroise Paré, 75475 Paris cedex 10, France
| | - M Pocard
- Université Paris 5, Sorbonne Paris Cité, rue de l'école de médecine, 75006 Paris, France; UMR Inserm 965, hôpital Lariboisière, 2, rue Amboise-Paré, 75010 Paris, France; Department of Surgical Oncology, hôpital Lariboisière, AP-HP, 2, rue Ambroise Paré, 75475 Paris cedex 10, France
| | - V Placé
- Department of Body and Interventional Imaging, hôpital Lariboisière, AP-HP, 2, rue Ambroise Paré, 75475 Paris cedex 10, France
| | - M Camus
- Department of Gastroenterology, hôpital Saint-Antoine, AP-HP, 184, rue du Faubourg Saint-Antoine, 75012 Paris, France
| | - C Eveno
- Université Paris 5, Sorbonne Paris Cité, rue de l'école de médecine, 75006 Paris, France; UMR Inserm 965, hôpital Lariboisière, 2, rue Amboise-Paré, 75010 Paris, France; Department of Surgical Oncology, hôpital Lariboisière, AP-HP, 2, rue Ambroise Paré, 75475 Paris cedex 10, France
| | - M Barret
- Department of Gastroenterology, hôpital Cochin, AP-HP, 27, rue du Faubourg Saint-Jacques, 75014 Paris, France
| | - A Dohan
- Department of Body and Interventional Imaging, hôpital Lariboisière, AP-HP, 2, rue Ambroise Paré, 75475 Paris cedex 10, France; Université Paris 5, Sorbonne Paris Cité, rue de l'école de médecine, 75006 Paris, France; UMR Inserm 965, hôpital Lariboisière, 2, rue Amboise-Paré, 75010 Paris, France.
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Barral M, Faraoun S, Fishman E, Dohan A, Pozzessere C, Berthelin MA, Bazeries P, Barat M, Hoeffel C, Soyer P. Imaging features of rare pancreatic tumors. Diagn Interv Imaging 2016; 97:1259-1273. [DOI: 10.1016/j.diii.2016.07.013] [Citation(s) in RCA: 13] [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] [Received: 06/07/2016] [Revised: 07/11/2016] [Accepted: 07/18/2016] [Indexed: 02/07/2023]
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Barat M, Soyer P, Eveno C, Dautry R, Perronne L, Guerrache Y, Boudiaf M, Pocard M, Dohan A. The presence of cardiophrenic angle lymph nodes is not an indicator of peritoneal carcinomatosis from colorectal cancer on MDCT: Results of a case-control study. Eur J Surg Oncol 2016; 42:266-72. [DOI: 10.1016/j.ejso.2015.11.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 11/10/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022] Open
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Sainson C, Barat M, Aguert M. Communication disorders and executive function impairment after severe traumatic brain injury: An exploratory study using the GALI (a grid for linguistic analysis of free conversational interchange). Ann Phys Rehabil Med 2014; 57:664-83. [PMID: 25277540 DOI: 10.1016/j.rehab.2014.08.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 08/27/2014] [Accepted: 08/27/2014] [Indexed: 10/24/2022]
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Whitwell RL, Milner AD, Cavina-Pratesi C, Barat M, Byrne CM, Goodale MA. Visual Feedforward Grasping and Motor Adaptation to Actual Target Width in Visual Form Agnosic Patient DF. J Vis 2014. [DOI: 10.1167/14.10.904] [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: 11/24/2022] Open
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Kumar SS, Lucas B, Soorkia S, Barat M, Fayeton JA. Cα–Cβ chromophore bond dissociation in protonated tyrosine-methionine, methionine-tyrosine, tryptophan-methionine, methionine-tryptophan and their sulfoxide analogs. Phys Chem Chem Phys 2012; 14:10225-32. [DOI: 10.1039/c2cp40773f] [Citation(s) in RCA: 8] [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: 11/21/2022]
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Kumar SS, Pérot-Taillandier M, Lucas B, Soorkia S, Barat M, Fayeton JA. UV photodissociation dynamics of deprotonated 2'-deoxyadenosine 5'-monophosphate [5'-dAMP-H]-. J Phys Chem A 2011; 115:10383-90. [PMID: 21776981 DOI: 10.1021/jp204738q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The UV photodissociation dynamics of deprotonated 2'-deoxyadenosine 5'-monophosphate ([5'-dAMP-H](-)) has been studied using a unique technique based on the coincident detection of the ion and the neutral fragments. The observed fragment ions are m/z 79 (PO(3)(-)), 97 (H(2)PO(4)(-)), 134 ([A-H](-)), 177 ([dAMP-H-A-H(2)O](-)), and 195 ([dAMP-H-A](-)), where "A" refers to a neutral adenine molecule. The relative abundances are comparable to that found in previous studies on [5'-dAMP-H](-) employing different excitation processes, i.e., collisions and UV photons. The fragmentation times of the major channels have been measured, and are all found to be on the microsecond time scale. The fragmentation mechanisms for all channels have been characterized using velocity correlation plots of the ion and neutral fragment(s). The findings show that none of the dissociation channels of [5'-dAMP-H](-) is UV specific and all proceed via statistical fragmentation on the ground state after internal conversion, a result similar to fragmentations induced by collisions.
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Affiliation(s)
- S Sunil Kumar
- Institut des Science Moléculaires d'Orsay, CNRS UMR 8214, Université Paris Sud 11, F-91405 Orsay Cedex, France
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Lamothe G, Muller F, Vital JM, Goossens D, Barat M. Evolution of spinal cord injuries due to cervical canal stenosis without radiographic evidence of trauma (SCIWORET): A prospective study. Ann Phys Rehabil Med 2011; 54:213-24. [DOI: 10.1016/j.rehab.2011.02.003] [Citation(s) in RCA: 11] [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] [Received: 11/05/2010] [Revised: 02/11/2011] [Accepted: 02/12/2011] [Indexed: 11/28/2022]
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Atlan A, Barat M, Legionnet AS, Parize L, Tarayre M. Genetic variation in flowering phenology and avoidance of seed predation in native populations of Ulex europaeus. J Evol Biol 2009; 23:362-71. [PMID: 20021551 DOI: 10.1111/j.1420-9101.2009.01908.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The genetic variation in flowering phenology may be an important component of a species' capacity to colonize new environments. In native populations of the invasive species Ulex europaeus, flowering phenology has been shown to be bimodal and related to seed predation. The aim of the present study was to determine if this bimodality has a genetic basis, and to investigate whether the polymorphism in flowering phenology is genetically linked to seed predation, pod production and growth patterns. We set up an experiment raising maternal families in a common garden. Based on mixed analyses of variance and correlations among maternal family means, we found genetic differences between the two main flowering types and confirmed that they reduced seed predation in two different ways: escape in time or predator satiation. We suggest that this polymorphism in strategy may facilitate maintain high genetic diversity for flowering phenology and related life-history traits in native populations of this species, hence providing high evolutionary potential for these traits in invaded areas.
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Affiliation(s)
- A Atlan
- Laboratoire ECOBIO- UMR 6553, Université de Rennes 1, Rennes, France.
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Affiliation(s)
- M. Pérot
- Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR 8625, Bât. 351, Orsay, F-91405 France and Université. Paris-Sud, Laboratoire de Photophysique Moléculaire, UPR 3361, Bât. 210, Orsay, F-91405 France
| | - B. Lucas
- Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR 8625, Bât. 351, Orsay, F-91405 France, and CNRS, UMR 8625, Orsay, F-91405 France
| | - M. Barat
- Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR 8625, Bât. 351, Orsay, F-91405 France, and CNRS, UMR 8625, Orsay, F-91405 France
| | - J. A. Fayeton
- Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR 8625, Bât. 351, Orsay, F-91405 France, and CNRS, UMR 8625, Orsay, F-91405 France
| | - C. Jouvet
- Université Paris-Sud, Laboratoire de Photophysique Moléculaire, UPR 3361, Bât. 210, Orsay, F-91405 France, and CNRS, UPR 3361, Orsay, F-91405 France
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Kadhane U, Pérot M, Lucas B, Barat M, Fayeton J, Jouvet C, Ehlerding A, Kirketerp MB, Nielsen SB, Wyer J, Zettergren H. Photodissociation of protonated tryptamine and its supramolecular complex with 18-crown-6 ether: Dissociation times and channels, absorption spectra, and excited states calculations. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.08.064] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [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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Lepère V, Picard YJ, Barat M, Fayeton JA, Lucas B, Béroff K. Photodissociation dynamics of Ar2+ and Ar3+ excited by 527 nm photons. J Chem Phys 2009; 130:194301. [DOI: 10.1063/1.3130974] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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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Lucas B, Barat M, Fayeton J, Jouvet C, Çarçabal P, Grégoire G. Statistical versus non-statistical photo-fragmentation of protonated GWG tri-peptide induced by UV excitation. Chem Phys 2008. [DOI: 10.1016/j.chemphys.2007.09.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lucas B, Barat M, Fayeton JA, Perot M, Jouvet C, Grégoire G, Brøndsted Nielsen S. Mechanisms of photoinduced CαCβ bond breakage in protonated aromatic amino acids. J Chem Phys 2008; 128:164302. [DOI: 10.1063/1.2899648] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [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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Tuna T, Chabot M, Pino T, Désesquelles P, LePadellec A, Martinet G, Barat M, Lucas B, Mezdari F, Montagnon L, Van-Oanh NT, Lavergne L, Lachaize A, Carpentier Y, Béroff K. Fragmentation branching ratios of highly excited hydrocarbon molecules CnH and their cations CnH+ (n⩽4). J Chem Phys 2008; 128:124312. [DOI: 10.1063/1.2884862] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Lepère V, Lucas B, Barat M, Fayeton JA, Picard VJ, Jouvet C, Çarçabal P, Nielsen I, Dedonder-Lardeux C, Grégoire G, Fujii A. Comprehensive characterization of the photodissociation pathways of protonated tryptophan. J Chem Phys 2007; 127:134313. [DOI: 10.1063/1.2770458] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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Lambrecq V, Muller F, Joseph PA, Cuny E, Mazaux JM, Barat M. Intérêts et limites du baclofène intrathécal dans les paraparésies spastiques héréditaires. ACTA ACUST UNITED AC 2007; 50:577-81. [PMID: 17368612 DOI: 10.1016/j.annrmp.2007.02.009] [Citation(s) in RCA: 11] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2006] [Accepted: 02/19/2007] [Indexed: 11/18/2022]
Abstract
BACKGROUND Chronic intrathecal delivery of baclofen has been introduced for treatment of severe spinal spasticity. Very little is known about this treatment in hereditary spastic paraparesis. Here we review the benefits and limitations of pump implantation for baclofen delivery in this population. METHODS Consecutive patients presenting with hereditary spastic paraparesis were assessed for spasticity (Ashworth and Penn scores), muscular strength and walking (speed, comfort and perimeter length). The effect of intrathecal delivery of baclofen was judged after progressive bolus injections or chronic administration by electrical syringe. The pump implantation was proposed when spasticity scores decreased by 2 or more points, with muscular strength preserved and walking area increased. RESULTS We investigated 6 patients (3 males; mean age 48 years) with hereditary spastic paraparesis. The mean follow-up was 19 years; for 4 patients who received pump implantation, the mean follow-up was 6.2 years. The mean baclofen daily dose was 75 mug. Satisfaction was high for patients who received implantation early instead of waiting for the natural course of the disease. DISCUSSION Some patients with hereditary spastic paraparesis have good functional improvement with chronic intrathecal delivery of baclofen if walking is still possible. Despite the natural history of the disease, functional results are stable during the first 5 years of treatment. The data indicate a possible compromise between decreased spasticity and muscular strengthening with the treatment.
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Affiliation(s)
- V Lambrecq
- Département de neurologie, CHU de Bordeaux, pôle neurosciences cliniques, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France
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Lepère V, Lucas B, Barat M, Fayeton JA, Picard YJ, Jouvet C, Carçabal P, Nielsen I, Dedonder-Lardeux C, Grégoire G, Fujii A. Characterization of neutral fragments issued from the photodissociation of protonated tryptophane. Phys Chem Chem Phys 2007; 9:5330-4. [PMID: 17914468 DOI: 10.1039/b708814k] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [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: 01/31/2023]
Abstract
New information on the photo-fragmentation of biomolecules is obtained from the detection of neutral and ionic fragments using a time and position resolved coincidence technique that reveals whether an ionic photofragment is associated with one or more neutral fragments. In the case of a sequential dissociation, both fragmentation channels are identified as well as their time ordering.
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Affiliation(s)
- V Lepère
- Laboratoire des Collisions Atomiques et Moléculaires, (CNRS UMR C8625), Bât. 351, Université Paris-Sud, 91405, Orsay Cedex, France
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Vignes JR, de Seze M, Guerin J, Barat M. Sacral neuromodulation as a functional treatment of bladder overactivity. Acta Neurochir Suppl 2007; 97:315-22. [PMID: 17691392 DOI: 10.1007/978-3-211-33079-1_42] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Sacral neuromodulation, namely the electrical stimulation of the sacral nerves has become an alternative treatment for cases of idiopathic bladder overactivity. The mechanism of action in this type of spinal cord modulation is only partially understood but it seems to involve stimulation of inhibitory interneurons. Temporary sacral nerve stimulation is the first step. It consists of the temporary application of neurostimulation as a diagnostic test in order to check the integrity of the sacral root and determine the best location for the implant. If the test stimulation is successful, a permanent device is implanted. In experienced hands, this is a safe procedure. When the patients are selected on the basis of sound criteria, more than three-quarters of them show a clinically significant improvement with a reduction in the frequency of incontinence episodes by more than 50%; however, the results vary according to each author's method of evaluation. The application of this technique should be combined with careful follow-up and attentive adjustments of the stimulation parameters in order to optimize the coordination of activity between the neurological systems involved.
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Affiliation(s)
- J R Vignes
- Department of Neurorehabilitation, CHU Pellegrin, Bordeaux, France.
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Le Gall C, Lamothe G, Mazaux JM, Muller F, Debelleix X, Richer E, Joseph PA, Barat M. [Outcome of the Aquitaine Unit for Evaluation, Training and Social and Vocational Counselling (UEROS) at 5-year follow-up in young adults with brain damage]. ACTA ACUST UNITED AC 2006; 50:5-13. [PMID: 16945446 DOI: 10.1016/j.annrmp.2006.06.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2006] [Accepted: 06/28/2006] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Difficulties in social and vocational adjustment are common in adults with brain damage. A French government-funded program, UEROS (Unit for Evaluation, Training and Social and Vocational Counselling), was developed to improve cognitive adjustment, social autonomy and return to work for these people. OBJECTIVES To describe the outcome and satisfaction with life after 5 years for patients who participated in the UEROS-Aquitaine network program. MAIN OUTCOME MEASURES EBIS Document to evaluate people with traumatic brain injury. RESULTS Seventy-five of the 102 patients participating in UEROS from 1997 to 1999 were assessed during a phone-structured interview based on the EBIS Document. The sample consisted of young adults (mean age 28.5 years), most (65, 85%) with brain injury and moderate disability (Glasgow Outcome Scale 2: 57%) or severe disability (Glasgow Outcome Scale 3: 42%). On entering the program, 33% of the subjects needed no help physically or cognitively. None were employed. At the end of the program, 9% were students or were learning a job, 8% worked full-time, 16% were in sheltered conditions, and 13% had volunteer activities. At 5-year follow-up, 50% of the subjects were independent, 4% were in school, 10.6% worked full-time, and 26.7% were in sheltered conditions. Playing sports was associated with good social adjustment. The professional status at 5 years was significantly correlated with following the UEROS program (r=0.30, P<0.01) and status at the end of the program (r=0.29, P<0.05). However, 41.3% of the subjects were still unsatisfied with their conditions of life. DISCUSSION-CONCLUSION In patients with brain damage, the UEROS-Aquitaine network program improves independence in daily living and allows for nearly one inactive adult in two (42%) to be engaged in an activity or a job.
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Abstract
OBJECTIVES To identify variables increasing fatigue following spinal cord injury (SCI) and their functional consequences. METHODS A search of the Medline and Reedoc databases with the keywords SCI, fatigue, intrinsic muscular fatigue, chronic fatigue, aging, training, electrostimulation, quality of life and the same words in French. RESULTS Two kinds of fatigue are identified following SCI. Intrinsic fatigue in muscles totally or partially paralysed at the level of or below the spinal cord lesion; this peripheral fatigue is due to denervation, total or partial loss of motoneurons, or histological and metabolical changes in muscle; it is well-defined by electrophysiological technology; spasticity and spasms have little influence on its development; it is reversible in part with long term electrostimulation, but at this time, electroneuroprosthetic techniques do not reduce the excessive energetic cost to stand up and walk. Chronic fatigue appears in the long term following SCI; it is linked with aging, physiological, and psychological deconditioning; some data point to chronic fatigue after SCI similar to post-polio syndrome and chronic fatigue syndrome, which may explain the central nature of the fatigue; training programs could be useful in delaying this chronic fatigue and as a consequence, increasing the latent quality of life. CONCLUSION Muscular intrinsic fatigue after SCI is always of a peripherical nature in muscles partially or totally paralysed. Chronic fatigue during aging greatly decreases quality of life. Both intrinsic and chronic fatigue could be anticipated by electrostimulation technique on the one hand and long term training on the other.
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Affiliation(s)
- M Barat
- Unité de Rééducation Neurologique, Université Victor-Segalen Bordeaux-II et Fédération des Neurosciences Cliniques, CHU de Bordeaux, 146, rue Léo-Saignat, 33076 Bordeaux cedex, France.
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Ismail IM, Lepère V, Barat M, Fayeton JA, Picard YJ, Wohrer K. Dissociative charge transfer and collision induced dissociation of Ar2+ and Ar3+ clusters in collisions with argon atoms at keV energies. J Chem Phys 2006; 124:164305. [PMID: 16674133 DOI: 10.1063/1.2191039] [Citation(s) in RCA: 6] [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: 11/15/2022] Open
Abstract
The dynamics of dissociative charge transfer and collision induced dissociation of Ar(2) (+) and Ar(3) (+) clusters colliding with Ar atoms at 4.8 keV has been investigated using a novel multifragment detection scheme that maps the postcollision vectors of all particles simultaneously. Estimation of internal energies and measurement of pre- and postcollision vectors enables a full description of reaction dynamics. The prominence of electronic excitation in defining the dynamics of these collision systems is demonstrated. The dissociation dynamics of Ar(3) (+) clusters is distinctly different from that of Ar(2) (+). This is attributed to a combination of lower internal energies and predominantly triangular T-shape structure of the Ar(3) (+) ion.
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Affiliation(s)
- I M Ismail
- Laboratoire des Collisions Atomiques et Moléculaires, Unité Mixte de Recherche C8625, Batiment 351, Université Paris-Sud XI, 91405 Orsay Cedex, France
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Kang H, Jouvet C, Dedonder-Lardeux C, Martrenchard S, Charrière C, Grégoire G, Desfrançois C, Schermann JP, Barat M, Fayeton JA. Photoinduced processes in protonated tryptamine. J Chem Phys 2006; 122:84307. [PMID: 15836039 DOI: 10.1063/1.1851503] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [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
The electronic excited state dynamics of protonated tryptamine ions generated by an electrospray source have been studied by means of photoinduced dissociation technique on the femtosecond time scale. The result is that the initially excited state decays very quickly within 250 fs. The photoinduced dissociation channels observed can be sorted in two groups of fragments coming from two competing primary processes on the singlet electronic surface. The first one corresponds to a hydrogen-atom loss channel that creates a tryptamine radical cation. The radical cation subsequently fragments to smaller ions. The second process is internal conversion due to the H-atom recombination on the electronic ground state. Time-dependent density functional theory calculations show that an excited pisigma* state dissociative along the protonated amino N-H stretch crosses both the locally excited pipi* state and the electronic ground state S(0) and thus triggers the photofragmentation reactions. The two processes have equivalent quantum yields, approximately equal to 50% of the fragments coming from the H-atom loss reaction. The two primary reaction paths can clearly be distinguished by their femtosecond pump/probe dynamics recorded on the different fragmentation channels.
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Affiliation(s)
- H Kang
- Laboratoire de Photophysique Moléculaire du CNRS, Bâtiment 210, Université Paris-Sud, 91405 Orsay, France
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Barat M. [Assessment of chronic pain in spinal cord injury]. Ann Readapt Med Phys 2006; 49:138-9. [PMID: 16488049 DOI: 10.1016/j.annrmp.2006.01.002] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2006] [Accepted: 01/04/2006] [Indexed: 05/06/2023]
Affiliation(s)
- M Barat
- Fédération des neurosciences cliniques, unités de rééducation neurologique, université Victor-Segalen-Bordeaux-II, CHU de Bordeaux, Bordeaux cedex, France.
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Guehl D, Dehail P, de Sèze MP, Cuny E, Faux P, Tison F, Barat M, Bioulac B, Burbaud P. Evolution of postural stability after subthalamic nucleus stimulation in Parkinson’s disease: a combined clinical and posturometric study. Exp Brain Res 2005; 170:206-15. [PMID: 16328280 DOI: 10.1007/s00221-005-0202-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [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: 12/08/2004] [Accepted: 08/18/2005] [Indexed: 10/25/2022]
Abstract
OBJECTIVES The occurrence of postural and balance disorders is a frequent feature in advanced forms of Parkinson's disease (PD). However, the pathological substrate of these disturbances is poorly understood. METHODS In the present work, we investigated the evolution of posturometric parameters [center of pressure (CoP) displacement and CoP area] and axial scores between the pre-operative period and 3 months post-operative in seven PD patients who underwent bilateral deep brain stimulation (DBS) of the subthalamic nucleus (STN). RESULTS After surgery, the patients leaned backwards much more regardless of the STN stimulation, suggesting that surgery could have a deleterious effect on postural adaptation. During the post-operative period, the improvement in axial and postural scores was similar under levodopatherapy and DBS. On the other hand, DBS of the STN significantly reduced the CoP displacement and the CoP area, whereas levodopatherapy tended only to reduce the CoP displacement and to increase the CoP area significantly. CONCLUSIONS These data suggest that DBS of the STN and levodopa do not act on the same neurological systems involved in posture regulation. DBS of the STN could improve posture via a direct effect on the pedunculopontine nucleus, which is known to be involved in posture regulation.
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Affiliation(s)
- D Guehl
- Service de Neurophysiologie Clinique, Hôpital Pellegrin, Place Amélie-Raba-Léon, CNRS UMR 5543, Université de Bordeaux, 2, Victor Segalen, 146 rue Léo Saignat, 33076, Bordeaux, France.
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Lepère V, Ismail IM, Barat M, Fayeton JA, Picard YJ, Wohrer K, Jouvet C, Martrenchard S. Lifetime and yield of metastable Ar2+ ions. J Chem Phys 2005; 123:174307. [PMID: 16375528 DOI: 10.1063/1.2085168] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Ar2(+) ions produced in a cooled supersonic expansion by electron-impact ionization are accelerated at 2.5 keV and kept during few milliseconds inside a linear electrostatic trap. The lifetime of the metastable Ar2(+) ion is determined from the measurement of the rate of the argon atoms escaping the trap. The lifetime and the relative metastable populations are measured as a function of the pressure and temperature in the supersonic expansion, i.e., of the mean cluster size. Possible mechanisms responsible for the metastable formation are discussed.
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Affiliation(s)
- V Lepère
- Centre de Cinétique rapide ELYSE, Université Paris-Sud, Orsay Cedex, France
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Dehail P, Joseph PA, Faux P, Rainfray M, Emeriau JP, Barat M, Bourdel-Marchasson I. Early changes in isokinetic lower limb muscle strength in recovering geriatric subjects on the basis of nutritional status. J Nutr Health Aging 2005; 9:356-63. [PMID: 16222403] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
BACKGROUND In older people, the decrease in muscle mass and strength has a bad effect on functional status. Malnutrition and lack of physical activity exacerbate this phenomenon. OBJECTIVE The main purpose of this study was to estimate isokinetic lower limb muscle strength in recovering older subjects on the basis of nutritional status. DESIGN Twenty-eight elderly subjects hospitalized for an acute event (85.8 +/- 6 years), including 16 malnourished, were enrolled in this study when clinically stable (T0). Re-assessment at one-month was performed in nine after oral supplementation and conventional physiotherapy (T1). The Maximal Peak Torque (MPT) of the ankle plantar flexors was estimated in concentric mode at 30 and 60 degrees /s. The MPT of the knee flexors and extensors was evaluated in the same mode at 30 degrees /s, 60 degrees /s and 120 degrees /s. All patients underwent a nutritional examination with anthropometric measures, dietary intake survey, biochemical indexes and determination of the medial gastrocnemius volume by magnetic resonance imaging. RESULTS At T0, whatever the muscle group tested (except at 120 degrees /s for the knee), the MPT appeared significantly lower in the malnourished group. At T1, the increase in MPT (plantar flexors) in malnourished patients was greater at 60 degrees /s (+23.8 %) than at 30 degrees /s (+14.8 %). Correlations between MPT and nutritional parameters were observed in the malnourished group only at T1 and in the normal-nourished group. CONCLUSION Isokinetic assessment seems to be a pertinent method to estimate lower limb muscle strength in older and frail subjects. Early modifications in strength were observed in malnourished patients who received oral supplementation and physiotherapy.
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Affiliation(s)
- P Dehail
- Departement de Geriatrie, Unite de Soins de Suite et Readaptation - CHU Bordeaux - Hopital Xavier-Arnozan, 33604 Pessac Cedex, France.
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Wiederkehr S, Barat M, Dehail P, de Sèze M, Lozes-Boudillon S, Giroire JM. [Decision making and executive function in severe traumatic brain injured patients: validation of a decision-making task and correlated features]. Rev Neurol (Paris) 2005; 161:201-10. [PMID: 15798519 DOI: 10.1016/s0035-3787(05)85023-4] [Citation(s) in RCA: 5] [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: 11/23/2022]
Abstract
OBJECTIVE At the chronic stage, severe traumatic brain injured (TBI) patients experience difficulty in making decisions. Several studies have demonstrated the involvement of the prefrontal cortex, in particular the orbitofrontal region, in decision-making. The aim of the present study was to validate a decision-making task in this population and to ascertain whether the components of their dysexecutive syndrome may affect their decision-making and lead to difficulties for social rehabilitation. PATIENTS AND METHODS Fifteen TBI patients and 15 controlled subjects matched for age, sex and years of education were assessed by a battery of executive tests (GREFEX) and by the gambling task (GT). RESULTS The TBI subjects performed significantly worse than the controlled group in five out of six GREFEX tests. The TBI choices are significantly more disadvantageous than the choices of the control group when considering the three last blocks of 20 cards of the GT. The GT total score correlated significantly with execution time of the Stroop interference condition and the Trail Making Task B, as well as with the two measures (correct sequence span and number of crossed boxes) of the double condition of Baddeley's task. CONCLUSION We postulate that executive functioning (supervisory attentional system) influence performance in the gambling task through mechanisms of inhibitory control, divided attention and working memory. Thus, this task seems to be determined by multiple factors; the process of decision-making may depend on frontal integrity.
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Affiliation(s)
- S Wiederkehr
- Unités de Rééducation Neurologique, UEROS Aquitaine, Fédération des Neurosciences Cliniques, CHU Pellegrin, place Amélie-Raba-Léon, 33076 Bordeaux Cedex
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Kang H, Dedonder-Lardeux C, Jouvet C, Grégoire G, Desfrançois C, Schermann JP, Barat M, Fayeton JA. Control of Bond-Cleaving Reactions of Free Protonated Tryptophan Ion by Femtosecond Laser Pulses. J Phys Chem A 2005; 109:2417-20. [PMID: 16833540 DOI: 10.1021/jp0407167] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The excited-state dynamics of protonated tryptophan ions is investigated by photoinduced fragmentation in the gas phase. In contrast to the neutral molecule that decays on the nanosecond time scale, the protonated species exhibits an ultrafast decay with two time constants of about 400 fs and 15 ps. In addition, after UV excitation by a pump photon at 266 nm, specific photofragments, and in particular the NH3-loss channel, can be enhanced by the absorption of a probe photon at 800 nm. The bond-cleaving reactions can thus be controlled by a variation of the pump/probe delay.
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Abstract
OBJECTIVE Discursive abilities of severe brain injured patient are always impaired: loss of flexibility, lack of cohesion and coherence, often more elliptic. We know few about nonverbal competencies during discourse. The objective is to verify nonverbal abilities of these patients by pragmatic analysis. METHODS Four men were examined more than 7 years after severe traumatic brain injury. Nonverbal Prutting and Kirchner Pragmatic Protocol (1987) were done allowing to a qualitative and quantitative measurement of paralinguistic behaviour: prosody and quality of speech, facial expression, posture, gaze, gesture. Two conditions were recorded: dual (descriptive discourse) and group (conversational discourse). Associated impairments such as cognitive and dysexecutive functioning were also investigated. RESULTS/DISCUSSION Impoverishment (loss of ability) or impaired inadequacity was observed in all patients. Paralinguistic competences of conversational discourse was worse than descriptive one. Facial expression, gaze functioning, referential gesture were more often impaired. Maladjustment could be interpretated in reference with dysexecutive syndrome. CONCLUSION In spite of the lack of information about the range of normal pragmatic behaviour, it seems that brain injured patients have shown poor nonverbal abilities during discourse. Rehabilitation training of communication skills would integrate this fact in order to improve interactivity and social relationship.
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Affiliation(s)
- S Aubert
- EA 487, handicap et cognition, université Victor-Segalen Bordeaux 2, France
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Kang H, Jouvet C, Dedonder-Lardeux C, Martrenchard S, Grégoire G, Desfrançois C, Schermann JP, Barat M, Fayeton JA. Ultrafast deactivation mechanisms of protonated aromatic amino acids following UV excitation. Phys Chem Chem Phys 2005; 7:394-8. [PMID: 19785164 DOI: 10.1039/b414986f] [Citation(s) in RCA: 129] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- H Kang
- Laboratoire de Photophysique Moléculaire du CNRS, Université Paris-Sud, Bât. 210, 91405 Orsay, France.
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Abstract
INTRODUCTION Post brainstem lesion dysphagia is frequently associated with palatal myoclonus (PM) but the correlation between these two symptoms is still unclear. OBJECTIVE The aim of this study was to verify the relationship between PM and dysphagia, and if PM could itself induce dysphagia. PATIENTS AND METHODS Twelve patients suffering from post brainstem lesion PM and dysphagia; 10 male and two female, mean aged of 50.5 years, were assessed using clinical examination, radiological and endoscopic examination of deglutition. RESULTS In three cases, PM were associated with pharyngeal area decreasing, laryngeal aspiration, and dysphagia. DISCUSSION This study confirms the hypothesis of close relationship between PM and dysphagia. In these cases, specific dysphagia therapy should be recommended. CONCLUSION Post brainstem lesion dysphagia is sometimes associated with PM and in some cases, there is probably a relationship between PM and swallowing disorders of these patients.
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Affiliation(s)
- D Goossens
- Service de médecine physique et de réadaptation, hôpital Pellegrin, CHU, 33076 Bordeaux cedex, France
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Kang H, Dedonder-Lardeux C, Jouvet C, Martrenchard S, Grégoire G, Desfrançois C, Schermann JP, Barat M, Fayeton JA. Photo-induced dissociation of protonated tryptophan TrpH+: A direct dissociation channel in the excited states controls the hydrogen atom loss. Phys Chem Chem Phys 2004. [DOI: 10.1039/b315425d] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.3] [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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Affiliation(s)
- M Barat
- Unités de rééducation neurologique, service de médecine physique et de réadaptation, CHU Pellegrin, 33076 Bordeaux, France.
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de Sèze M, de Sèze M, Joseph PA, Wiart L, Nguyen PVT, Barat M. [Functional prognosis of paraplegia due to cord ischemia: a retrospective study of 23 patients]. Rev Neurol (Paris) 2003; 159:1038-45. [PMID: 14710024] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
The functional prognosis of spinal cord infarct is not well known, complicating care of patients suffering from ischemic paraplegia. The aim of this study was to evaluate the clinical and functional outcome of patients with spinal cord infarct treated in rehabilitation centers in order to identify factors influencing functional outcome. We studied cases of non-trauma-related paraplegia treated between 1992 and 1999. Spinal compression and infectious and inflammatory myelopathy were excluded. Age, gender, cardiovascular risk factors, initial and final clinical findings according to the American Spinal Injury Association (ASIA/IMSOP) criteria, MRI findings, and initial urodynamic findings were analyzed. Two groups were identified regarding extension of the spinal cord infarct to the cone or not. Assessment of functional outcome was based on the Frankel classification, ambulatory ability, wheelchair use, and bladder control. Cases of spinal cord infarct were then classified according to extension to the cone or not, determined on the basis of initial clinical, MRI, and urodynamic findings. Twenty-three patients (19 males and 4 females) were selected for analysis. Mean age was 54 years, with no mortality during the follow-up period. At discharge, the group of nine patients whose infarct had not extended to the medullary cone had a significantly better motor recovery using the ASIA motor score (p<0.01). Patients whose infarct did not extend to the cone used wheelchairs less often, were more often in Frankel class D (p<0.05), and had normal bladder control more often (p<0.05) than patients whose infarct extended to the cone. Lack of extension to the medullary cone appeared to be a factor predictive of better functional outcome.
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Affiliation(s)
- Mt de Sèze
- Service de Médecine Physique et Réadaptation, Centre Hospitalier Universitaire de Bordeaux, France
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Abstract
INTRODUCTION Relaxant muscle properties and pain relieve effectiveness in neurological spasmodic disorders of botulinum toxin A (BTXA) suggested its relevance to relieve musculoskeletal pain. The aim of this article was to collect literature data and to assess the different analgesia indications of BTXA proposed in the treatment of musculoskeletal pains. METHOD The international literature was carried out with the Medline data bank using keywords toxin and pain. Only clinical trials have been analysed. RESULTS Three hundred and seventeen articles were collected and 12 clinical trials were retained. They are focused on 4 chronic diseases, neck pain, tennis elbow, Piriformis syndrome and low back pain. Results of the 6 chronic neck pain studies are contradictory and emphasize the difficulty to display a satisfactory analgesia effect of BTXA in this indication. Results of the studies concerning other indications (tennis elbow, Piriformis syndrome and low back pain) seem to be more effective and clinically pertinent. DISCUSSION Analgesia BTXA effect seems to be conditioned by the presence of an objective muscular spasm or stringy disease inducing musculoskeletal pain. CONCLUSION The first data concerning use of BTXA to treat musculoskeletal pains are few and are worth specifying by other studies.
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Affiliation(s)
- M P de Sèze
- Service de médecine physique et de réadaptation, hôpital Tastet-Girard-Pellegrin, CHU de Bordeaux, 33076 Bordeaux, France.
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Abstract
Botulinum toxin is a successful focal spasticity therapy. The aim of this article is to study the data of the literature concerning its utilisation in traumatic brain injured patients, whom motor and tonus disturbances are polymorphic, in their clinical presentation as well as in their evolution. Although there are few studies concerning its utilisation in such patients, none of them being controlled, its use seems interesting in focal spasticity treatment. It can contribute to improve functional abilities and comfort for these patients.
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Affiliation(s)
- E Duprey
- Clinique Napoléon, lac de Christus, 40990 Saint-Paul-Lès-Dax, France.
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