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Riescher S, Dos Santos A, Lecomte R, Lenoble C, Guillon B. A case report of unilateral cerebral vasculitis in adults: keep in mind Lyme neuroborreliosis. BMC Infect Dis 2023; 23:283. [PMID: 37142957 PMCID: PMC10158163 DOI: 10.1186/s12879-023-08259-z] [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] [Received: 10/04/2022] [Accepted: 04/14/2023] [Indexed: 05/06/2023] Open
Abstract
BACKGROUND Lyme neuroborreliosis (LNB), due to infection of the nervous system by the spirochete Borrelia burgdorferi, occurs in 15% of Lyme disease cases. However, neurovascular involvement is uncommon, especially recurrent stroke related to cerebral vasculitis in the absence of CSF pleocytosis. CASE PRESENTATION We report the case of a 58-year-old man without any medical history who exhibited recurrent strokes in the same vascular territory (left internal carotid). Multiple biological screening, neuroimaging methods, and cardiovascular examinations failed to provide a diagnosis and treatment that could have prevented recurrences. Finally, B. burgdorferi sensu lato serology testing in blood and cerebrospinal fluid enabled diagnosis of LNB, in relation to a cerebral vasculitis. The patient experienced no further stroke after four weeks of doxycycline treatment. CONCLUSION B. burgdorferi central nervous system infection must be considered in case of unexplained recurrent and/or multiple strokes, especially if cerebral vasculitis is suspected or demonstrated on neuroimaging.
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Affiliation(s)
- Stanislas Riescher
- Service de Médecine interne, Nantes University Hospital Center, Nantes cx 1, France
| | - Amélie Dos Santos
- Service de Neurologie, Nantes University Hospital Center, Nantes, France
| | - Raphaël Lecomte
- Service de Maladies infectieuses et Tropicales, Nantes University Hospital Center, Nantes, France
| | - Cédric Lenoble
- Service de Neurologie, Nantes University Hospital Center, Nantes, France
| | - Benoit Guillon
- Service de Neurologie, Nantes University Hospital Center, Nantes, France.
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Allard J, Delvoye F, Pop R, Labreuche J, Maier B, Marnat G, Sibon I, Zhu F, Lapergue B, Consoli A, Spelle L, Denier C, Richard S, Piotin M, Gory B, Mazighi M, Redjem H, Escalard S, Dessilles JP, Delvoye F, Smajda S, Maier B, Solène H, Mazighi M, Obadia M, Sabben C, Pierre S, Igor R, Corabianu O, de Broucker T, Manchon E, Taylor G, Maacha MB, Thion LA, Augustin L, Julien S, Wang A, Evrard S, Tchikviladze M, Ajili N, WeisenburgerLile D, Gorza L, Buard G, Coskun O, Di Maria F, Rodesh G, Zimatore S, Leguen M, Gratieux J, Pico F, Rakotoharinandrasana H, Tassan P, Poll R, Marinier S, Barreau X, Berge J, Menegon P, Lucas L, Olindo S, Renou P, Sagnier S, Poli M, Debruxelles S, Rouanet F, Tourdias T, Liegey JS, Briau P, Pangon N, Coussy A, Papillon L, Papaxanthos J, Detraz L, Daumas-Duport B, Alexandre PL, Roy M, Lenoble C, Desal H, Guillon B, de Gaalon S, Preterre C, Bracard S, Anxionnat R, Braun M, Derelle AL, Tonnelet R, Liao L, Zhu F, Schmitt E, Planel S, Humbertjean L, Lacour JC, Riou-Comte N, Voicu M, Alb L, Reitter M, Brezeanu M, Masson A, Tabarna A, Podar I, Macian-Montoro F, Saleme S, Mounayer C, Rouchaud A, Costalat V, Arquizan C, Dargazanli C, Gascou G, Lefèvre PH, Derraz I, Riquelme C, Gaillard N, Mourand I, Corti L, Cagnazzo F, Ter Schiphorst A, Ferre JC, Raoult H, Ronziere T, Lassale M, Paya C, Gauvrit JY, Tracol C, Langnier-Lemercier S. 24-Hour Carotid Stent Patency and Outcomes After Endovascular Therapy: A Multicenter Study. Stroke 2023; 54:124-131. [PMID: 36542074 DOI: 10.1161/strokeaha.122.039797] [Citation(s) in RCA: 1] [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] [Indexed: 12/24/2022]
Abstract
BACKGROUND Management of extracranial internal carotid artery steno-occlusive lesion during endovascular therapy remains debated. Stent occlusion within 24 hours of endovascular therapy is a frequent event after acute carotid artery stenting, and we currently lack large population results. We investigated the incidence, predictors, and clinical impact of stent occlusion after acute carotid artery stenting in current clinical practice. METHODS Patients treated by endovascular therapy with acute carotid artery stenting between 2015 and 2019 in 5 large-volume endovascular-capable centers were retrospectively analyzed. Patients were separated in 2 groups according to the stent patency at 24 hours after carotid artery stenting. We compared baseline characteristics, treatment modalities, and clinical outcome depending on 24-hour stent patency. Primary end point was favorable outcome, defined as a modified Rankin Scale score 0-2 at 3 months. RESULTS A stent occlusion was observed in 47/225 patients (20.9%). Patients with stent patency had a lower baseline National Institutes of Health Stroke Scale (median [interquartile range]: 13 [7-17] versus 18 [12-21]) and had more often stroke of atherothrombotic origin (77.0% versus 53.2%). A higher stent patency rate was found for patients treated with P2Y12 antagonists at the acute phase (odds ratio [OR]' 2.95 [95% CI' 1.10-7.91]; P=0.026) and treated with angioplasty (OR' 2.42 [95% CI' 1.24-4.67]; P=0.008). A better intracranial angiographic reperfusion was observed in patients with 24-hour stent patency compared with patients without stent patency (OR' 8.38 [95% CI' 3.07-22.78]; P<0.001). Patients with a stent patency at 24 hours had a higher chance of favorable outcome (OR' 3.29 [95% CI, 1.66-6.52]; P<0.001) and a lower risk of death (OR' 0.32 [95% CI, 0.13-0.76]; P=0.009). CONCLUSIONS One out of 5 patients treated with carotid artery stenting during endovascular therapy presented a stent occlusion within 24 hours. This event was associated with worse functional outcome. Stroke etiology, P2Y12 antagonist administration, quality of intracranial reperfusion, and angioplasty were associated with 24-hour stent patency.
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Affiliation(s)
- Julien Allard
- Department of Interventional Neuroradiology, Rothschild Foundation, Paris, France (J.A., F.D., B.M., MP, M.M.).,University of Paris' France (J.A., M.M.)
| | - François Delvoye
- Department of Interventional Neuroradiology, Rothschild Foundation, Paris, France (J.A., F.D., B.M., MP, M.M.)
| | - Raoul Pop
- Department of Neuroradiolology, CHU Strasbourg, France (R.P.).,Institut de Chirurgie Minime Invasive Guidée par l'Image, Strasbourg, France (R.P.).,University of Strasbourg, INSERM UMR-S1255, France (R.P.)
| | - Julien Labreuche
- Department of Biostatistics, CHU Lille, University of Lille, France (J.L.)
| | - Benjamin Maier
- Department of Interventional Neuroradiology, Rothschild Foundation, Paris, France (J.A., F.D., B.M., MP, M.M.).,LVTS, INSERM U1148, University of Paris, France (BM., M.M.)
| | - Gaultier Marnat
- Department of Diagnostic and Interventional Neuroradiology, University Hospital of Bordeaux, France (G.M.)
| | - Igor Sibon
- Department of Neurology, Stroke Center, University Hospital of Bordeaux, France (I.S.)
| | - François Zhu
- Department of Diagnostic and Therapeutic Neuroradiology, CHRU-Nancy, Université de Lorraine, France (B.G., F.Z.)
| | - Bertrand Lapergue
- Department of Neurology, Foch Hospital, Versailles Saint-Quentin en Yvelines University, Suresnes, France (B.L.)
| | - Arturo Consoli
- Diagnostic and Interventional Neuroradiology, Foch Hospital, Versailles Saint-Quentin en Yvelines University, Suresnes, France (A.C.)
| | - Laurent Spelle
- Department of Neuroradiolology, CHU Kremlin-Bicêtre, Le Kremlin Bicêtre, France (L.S.)
| | - Christian Denier
- Department of Neurology, CHU Kremlin-Bicêtre, Le Kremlin Bicêtre, France (C.D.)
| | - Sébastien Richard
- Department of Neurology, Stroke Unit, Université de Lorraine, CHRU-Nancy, France (S.R.).,CIC-P 1433, INSERM U1116, CHRU-Nancy, France (S.R.)
| | - Michel Piotin
- Department of Interventional Neuroradiology, Rothschild Foundation, Paris, France (J.A., F.D., B.M., MP, M.M.)
| | - Benjamin Gory
- Department of Diagnostic and Therapeutic Neuroradiology, CHRU-Nancy, Université de Lorraine, France (B.G., F.Z.).,IADI, INSERM U1254, Université de Lorraine, Nancy, France (B.G.)
| | - Mikael Mazighi
- Department of Interventional Neuroradiology, Rothschild Foundation, Paris, France (J.A., F.D., B.M., MP, M.M.).,LVTS, INSERM U1148, University of Paris, France (BM., M.M.).,University of Paris' France (J.A., M.M.)
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Olivot J, Finitsis S, Lapergue B, Marnat G, Sibon I, Richard S, Viguier A, Cognard C, Mazighi M, Gory B, Piotin M, Blanc R, Redjem H, Escalard S, Desilles J, Delvoye F, Smajda S, Maïer B, Hebert S, Mazighi M, Obadia M, Sabben C, Seners P, Raynouard I, Corabianu O, de Broucker T, Manchon E, Taylor G, Maacha MB, Thion L, Lecler A, Savatovsjy J, Wang A, Evrard S, Tchikviladze M, Ajili N, Lapergue B, Weisenburger‐Lile D, Gorza L, Buard G, Coskun O, Consoli A, Di Maria F, Rodesh G, Zimatore S, Leguen M, Gratieux J, Pico F, Rakotoharinandrasana H, Tassan P, Poll R, Marinier S, Nighoghossian N, Riva R, Eker O, Turjman F, Derex L, Cho T, Mechtouff L, Lukaszewicz A, Philippeau F, Cakmak S, Blanc‐Lasserre K, Vallet A, Marnat G, Gariel F, Barreau X, Berge J, Menegon P, Sibon I, Lucas L, Olindo S, Renou P, Sagnier S, Poli M, Debruxelles S, Rouanet F, Tourdias T, Liegey J, Briau P, Pangon N, Bourcier R, Detraz L, Daumas‐Duport B, Alexandre P, Roy M, Lenoble C, Desal H, Guillon B, de Gaalon S, Preterre C, Gory B, Bracard S, Anxionnat R, Braun M, Derelle A, Liao L, Zhu F, Schmitt E, Planel S, Richard S, Humbertjean L, Mione G, Lacour J, Douarinou M, Audibert G, Voicu M, Alb I, Reitter M, Brezeanu M, Masson A, Tabarna A, Podar I, Bourst P, Beaumont M, Chen (Mitchelle) B, Guy S, Georges V, Bechiri F, Macian‐Montoro F, Saleme S, Mounayer C, Rouchaud A, Gimenez L, Cosnard A, Costalat V, Arquizan C, Dargazanli C, Gascou G, Lefèvre P, Derraz I, Riquelme C, Gaillard N, Mourand I, Corti L, Cagnazzo F, ter Schiphorst A, Alias Q, Boustia F, Ferre J, Raoult H, Gauvrit J, Vannier S, Guillen M, Ronziere T, Lassalle V, Tracol C, Malrain C, Boinet S, Clarençon F, Shotar E, Sourour N, Lenck S, Premat K, Samson Y, Léger A, Crozier S, Baronnet F, Alamowitch S, Bottin L, Yger M, Degos V, Spelle L, Denier C, Chassin O, Chalumeau V, Caroff J, Chassin O, Venditti L, Sarov M, Legris N, Naggara O, Hassen WB, Boulouis G, Rodriguez‐Régent C, Trystram D, Kerleroux B, Turc G, Domigo V, Lamy C, Birchenall J, Isabel C, Lun F, Viguier A, Cognard C, Januel A, Olivot J, Raposo N, Bonneville F, Albucher J, Calviere L, Darcourt J, Bellanger G, Tall P, Touze E, Barbier C, Schneckenburger R, Boulanger M, Cogez J, Guettier S, Gauberti M, Timsit S, Gentric J, Ognard J, Merrien FM, Wermester OO, Massardier E, Papagiannaki C, Triquenot A, Lefebvre M, Bourdain F, Bernady P, Lagoarde‐Segot L, Cailliez H, Veunac L, Higue D, Wolff V, Quenardelle V, Lauer V, Gheoca R, Pierre‐Paul I, Pop R, Beaujeux R, Mihoc D, Manisor M, Pottecher J, Meyer A, Chamaraux‐Tran T, Le Bras A, Evain S, Le Guen A, Richter S, Hubrecht R, Demasles S, Barroso B, Sablot D, Farouil G, Tardieu M, Smadja P, Aptel S, Seiler I. Parenchymal hemorrhage rate is associated with time to reperfusion and outcome. Ann Neurol 2022; 92:882-887. [DOI: 10.1002/ana.26478] [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] [Received: 06/06/2022] [Revised: 08/08/2022] [Accepted: 08/11/2022] [Indexed: 11/08/2022]
Affiliation(s)
| | | | - Bertrand Lapergue
- Department of Neurology Foch Hospital Versailles Saint‐Quentin en Yvelines University Suresnes France
| | - Gaultier Marnat
- Department of Diagnostic and Interventional Neuroradiology University Hospital of Bordeaux France
| | - Igor Sibon
- Department of Neurology, Stroke Center University Hospital of Bordeaux France
| | - Sebastien Richard
- Université de Lorraine, CHRU‐Nancy, Department of Neurology, Stroke Unit F‐54000 Nancy France
- CIC‐P 1433 , INSERM U1116, CHRU‐Nancy, F‐54000 Nancy France
| | - Alain Viguier
- Acute Stroke Unit‐ CIC 1436‐UMR 1214, CHU Toulouse France
| | - Christophe Cognard
- Department of Interventional and Diagnostic Neuroradiolology CHU Toulouse France
| | - Mikael Mazighi
- Department of Interventional Neuroradiology FHU Neurovasc, INSERM 1148, Université de Paris Cité Rothschild Foundation, Paris France
- Diagnostic and Therapeutic Neuroradiology, F‐54000 Nancy France
| | - Benjamin Gory
- Université de Lorraine, IADI, INSERM U1254 F‐54000 Nancy France
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Le Picault B, David CH, Alexandre PL, Lenoble C, Bizouarn P, Lepoivre T, Groleau N, Rozec B, Desal H, Roussel JC, Sénage T. Success of Thrombectomy in Management of Ischemic Stroke in Two Patients with SynCardia Total Artificial Heart in Bridge-to-Transplantation. Bioengineering (Basel) 2021; 8:bioengineering8090126. [PMID: 34562948 PMCID: PMC8469750 DOI: 10.3390/bioengineering8090126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/15/2021] [Accepted: 09/16/2021] [Indexed: 12/03/2022] Open
Abstract
Introduction: Circulatory assistance from a SynCardia Total Artificial Heart (SynCardia-TAH) is a reliable bridge-to-transplant solution for patients with end-stage biventricular heart failure. Ischemic strokes affect about 10% of patients with a SynCardia-TAH. We report for the first time in the literature two successful thrombectomies to treat the acute phase of ischemic stroke in two patients treated with a SynCardia-TAH in the bridge-to-transplant (BTT). Case report: We follow two patients with circulatory support from a SynCardia-TAH in the bridge-to-transplant for terminal biventricular cardiac failure with ischemic stroke during the support period. An early in-hospital diagnosis enables the completion of a mechanical thrombectomy within the first 6 h of the onset of symptoms. There was no intracranial hemorrhagic complication during or after the procedure and the patients fully recovered from neurological deficits, allowing a successful heart transplant. Conclusion: This case report describes the possibility of treating ischemic strokes under a SynCardia-TAH by mechanical thrombectomy following the same recommendations as for the general population with excellent results and without any hemorrhagic complication during or after the procedure.
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Affiliation(s)
- Brendan Le Picault
- Department of Cardiothoracic Surgery, Nantes University Hospital, 44093 Nantes, France; (C.-H.D.); (J.-C.R.); (T.S.)
- Correspondence:
| | - Charles-Henri David
- Department of Cardiothoracic Surgery, Nantes University Hospital, 44093 Nantes, France; (C.-H.D.); (J.-C.R.); (T.S.)
| | - Pierre-Louis Alexandre
- Department of Neuroradiology, Nantes University Hospital, 44093 Nantes, France; (P.-L.A.); (C.L.); (H.D.)
| | - Cédric Lenoble
- Department of Neuroradiology, Nantes University Hospital, 44093 Nantes, France; (P.-L.A.); (C.L.); (H.D.)
| | - Philippe Bizouarn
- Department of Cardiothoracic Anesthesiology, Nantes University Hospital, 44093 Nantes, France; (P.B.); (T.L.); (N.G.); (B.R.)
| | - Thierry Lepoivre
- Department of Cardiothoracic Anesthesiology, Nantes University Hospital, 44093 Nantes, France; (P.B.); (T.L.); (N.G.); (B.R.)
| | - Nicolas Groleau
- Department of Cardiothoracic Anesthesiology, Nantes University Hospital, 44093 Nantes, France; (P.B.); (T.L.); (N.G.); (B.R.)
| | - Bertrand Rozec
- Department of Cardiothoracic Anesthesiology, Nantes University Hospital, 44093 Nantes, France; (P.B.); (T.L.); (N.G.); (B.R.)
| | - Hubert Desal
- Department of Neuroradiology, Nantes University Hospital, 44093 Nantes, France; (P.-L.A.); (C.L.); (H.D.)
| | - Jean-Christian Roussel
- Department of Cardiothoracic Surgery, Nantes University Hospital, 44093 Nantes, France; (C.-H.D.); (J.-C.R.); (T.S.)
| | - Thomas Sénage
- Department of Cardiothoracic Surgery, Nantes University Hospital, 44093 Nantes, France; (C.-H.D.); (J.-C.R.); (T.S.)
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5
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Marnat G, Lapergue B, Sibon I, Gariel F, Bourcier R, Kyheng M, Labreuche J, Dargazanli C, Consoli A, Blanc R, Piotin M, Mazighi M, Richard S, Gory B, Redjem H, Escalard S, Desilles JP, Redjem H, Ciccio G, Smajda S, Fahed R, Obadia M, Sabben C, Corabianu O, de Broucker T, Smadja D, Alamowitch S, Ille O, Manchon E, Garcia PY, Taylor G, Ben Maacha M, Bourdain F, Decroix JP, Wang A, Evrard S, Tchikviladze M, Coskun O, Di Maria F, Rodesh G, Leguen M, Tisserand M, Pico F, Rakotoharinandrasana H, Tassan P, Poll R, Nighoghossian N, Riva R, Eker O, turjman F, Derex L, Cho TH, Mechtouff L, Claire Lukaszewicz A, Philippeau F, Cakmak S, Blanc-Lasserre K, Vallet AE, Barreau X, Berge J, Menegon P, Lucas L, Olindo S, Renou P, Sagnier S, Poli M, Debruxelles S, Rouanet F, Tourdias T, Liegey JS, Detraz L, Daumas-Duport B, Alexandre PL, Roy M, Lenoble C, L’allinec V, Girot JB, Desal H, Bracard S, Anxionnat R, Braun M, Derelle AL, Tonnelet R, Liao L, Zhu F, Schmitt E, Planel S, Humbertjean L, Mione G, Lacour JC, Bonnerot M, Riou-Comte N, Costalat V, Gascou G, Lefèvre PH, Derraz I, Riquelme C, Arquizan C, Gaillard N, Mourand I, Corti L, Cagnazzo F, Anadani M, Spiotta A, Alawieh A, Turjman F, Haussen D, Nogueira R, Papanagiotou P, Siddiqui AH, Dorn F, Cognard C, Ribo M, Psychogios M, Labeyrie MA, Biondi A, Andrew Grossberg J, Guenego A, Darcourt J, Vukasinovic I, Pomero E, Davies J, Renieri L, Hecker C, Muchada Muchada M, Houdart E, Turner R, Turk A, Chaudry I, Lockau J, Kastrup A, Behme D, Shallwani H, Christopher M, Mione G. Safety and Outcome of Carotid Dissection Stenting During the Treatment of Tandem Occlusions. Stroke 2020; 51:3713-3718. [DOI: 10.1161/strokeaha.120.030038] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Background and Purpose:
The efficacy of endovascular therapy in patients with acute ischemic stroke due to tandem occlusion is comparable to that for isolated intracranial occlusion in the anterior circulation. However, the optimal management of acute cervical internal carotid artery lesions is unknown, especially in the setting of carotid dissection, but emergency carotid artery stenting (CAS) is frequently considered. We investigated the safety and efficacy of emergency CAS for carotid dissection in patients with acute stroke with tandem occlusion in current clinical practice.
Methods:
We retrospectively analyzed a prospectively maintained database composed of 2 merged multicenter international observational real-world registries (Endovascular Treatment in Ischemic Stroke and Thrombectomy in Tandem Lesion). Data from endovascular therapy performed in the treatment of tandem occlusions related to acute cervical carotid dissection between January 2012 and January 2019 at 24 comprehensive stroke centers were analyzed.
Results:
The study assessed 136 patients with tandem occlusion due to dissection, including 65 (47.8%) treated with emergency CAS and 71 (52.2%) without. The overall rates of favorable outcome (90-day modified Rankin Scale score, 0–2) and successful reperfusion (modified Thrombolysis in Cerebral Infarction, 2b–3) were 58.0% (n=76 [95% CI, 49.6%–66.5%]) and 77.9% (n=106 [95% CI, 71.0%–85.0%]), respectively. In subgroup analyses, the rate of successful reperfusion (89.2% versus 67.6%; adjusted odds ratio, 2.24 [95% CI, 1.33–3.77]) was higher after CAS, whereas the 90-day favorable outcome (54.3% versus 61.4%; adjusted odds ratio, 0.84 [95% CI, 0.58–1.22]), symptomatic intracerebral hemorrhage (sICH; 10.8% versus 5.6%; adjusted odds ratio, 1.59 [95% CI, 0.79–3.17]), and 90-day mortality (8.0% versus 5.8%; adjusted odds ratio, 1.00 [95% CI, 0.48–2.09]) did not differ. In sensitivity analyses of patients with successful intracranial reperfusion, CAS was not associated with an improved clinical outcome.
Conclusions:
Emergency stenting of the dissected cervical carotid artery during endovascular therapy for tandem occlusions seems safe, whatever the quality of the intracranial reperfusion.
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Affiliation(s)
- Gaultier Marnat
- Department of Neuroradiology, University Hospital of Bordeaux, France (G.M., F.G.)
| | - Bertrand Lapergue
- Department of Neurology, Foch Hospital, Versailles Saint-Quentin-en-Yvelines University, Suresnes, France (B.L.)
| | - Igor Sibon
- Department of Neurology, University Hospital of Bordeaux, France (I.S.)
| | - Florent Gariel
- Department of Neuroradiology, University Hospital of Bordeaux, France (G.M., F.G.)
| | - Romain Bourcier
- Department of Neuroradiology, University Hospital of Nantes, France (R.B.)
- Department of Interventional Neuroradiology, Rothschild Foundation, Paris, France (R.B., M.P., M.M.)
| | - Maeva Kyheng
- Université Lille, CHU Lille, EA 2694-Santé Publique: Épidémiologie et Qualité des Soins—Lille—France (M.K., J.L.)
| | - Julien Labreuche
- Université Lille, CHU Lille, EA 2694-Santé Publique: Épidémiologie et Qualité des Soins—Lille—France (M.K., J.L.)
| | - Cyril Dargazanli
- Department of Neuroradiology, CHRU Gui de Chauliac, Montpellier, France (C.D.)
| | - Arturo Consoli
- Department of Neuroradiology, Foch Hospital, Versailles Saint-Quentin en Yvelines University, Suresnes, France (A.C.)
| | | | - Michel Piotin
- Department of Interventional Neuroradiology, Rothschild Foundation, Paris, France (R.B., M.P., M.M.)
| | - Mikael Mazighi
- Department of Interventional Neuroradiology, Rothschild Foundation, Paris, France (R.B., M.P., M.M.)
| | - Sebastien Richard
- Université de Lorraine, CHRU-Nancy, Department of Neurology, Stroke Unit, F-54000 Nancy, France (S.R.)
- INSERM U1116, CHRU-Nancy, F-54000 Nancy, France (S.R.)
| | - Benjamin Gory
- Université de Lorraine, CHRU-Nancy, Department of Diagnostic and Therapeutic Neuroradiology, F-54000 Nancy, France (B.G.)
- Université de Lorraine, IADI, INSERM U1254, F-54000 Nancy, France (B.G.)
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Pichon B, Rousseau C, Blanc-Lapierre A, Delpon G, Ferrer L, Libois V, Le Turnier M, Lenoble C, Bodet-Milin C, Goldenberg DM, Kraeber-Bodere F, Supiot S. Targeting Stereotactic Body Radiotherapy on Metabolic PET- and Immuno-PET-Positive Vertebral Metastases. Biomedicines 2020; 8:biomedicines8120548. [PMID: 33260610 PMCID: PMC7760481 DOI: 10.3390/biomedicines8120548] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/18/2020] [Accepted: 11/23/2020] [Indexed: 12/19/2022] Open
Abstract
(1) Background: Stereotactic body radiotherapy (SBRT) for vertebral metastases (VM) allows the delivery of high radiation doses to tumors while sparing the spinal cord. We report a new approach to clinical target volume (CTV) delineation based on anti-carcinoembryonic antigen (CEA) positron emission tomography (pretargeted immuno-PET; “iPET”) in patients with metastatic breast cancer (BC) or medullary thyroid cancer (MTC). (2) Methods: All patients underwent iPET, spine magnetic resonance imaging (MRI), and positron emission tomography-computed tomography (PET-CT) using 18F-deoxyglucose (FDG) for BC or 18F-dihydroxy-phenylalanine (F-DOPA) for MTC. Vertebrae locations and vertebral segments of lesions were recorded and the impact on CTV delineation was evaluated. (3) Results: Forty-six VM eligible for SBRT following iPET were evaluated in eight patients (five BC, three MTC). Eighty-one vertebral segments were detected using MRI, 26 with FDG or F-DOPA PET/CT, and 70 using iPET. iPET was able to detect more lesions than MRI for vertebral bodies (44 vs. 34). iPET-based delineation modified MRI-based CTV in 70% (32/46) of cases. (4) Conclusion: iPET allows a precise mapping of affected VM segments, and adds complementary information to MRI in the definition of candidate volumes for VM SBRT. iPET may facilitate determining target volumes for treatment with stereotactic body radiotherapy in metastatic vertebral disease.
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Affiliation(s)
- Baptiste Pichon
- Department of Radiotherapy and Nuclear Medicine Institut de Cancérologie de l’Ouest (ICO), F-44800 Saint-Herblain, France; (B.P.); (C.R.); (A.B.-L.); (G.D.); (L.F.); (V.L.); (F.K.-B.)
- Department of Radiation Oncology, Clinique Pasteur, 31300 Toulouse, France
| | - Caroline Rousseau
- Department of Radiotherapy and Nuclear Medicine Institut de Cancérologie de l’Ouest (ICO), F-44800 Saint-Herblain, France; (B.P.); (C.R.); (A.B.-L.); (G.D.); (L.F.); (V.L.); (F.K.-B.)
- Centre de Recherche en Cancéro-Immunologie Nantes Angers (CRCINA), Inserm U1232, CNRS ERL 6001, Université de Nantes, F-44000 Nantes, France;
| | - Audrey Blanc-Lapierre
- Department of Radiotherapy and Nuclear Medicine Institut de Cancérologie de l’Ouest (ICO), F-44800 Saint-Herblain, France; (B.P.); (C.R.); (A.B.-L.); (G.D.); (L.F.); (V.L.); (F.K.-B.)
| | - Gregory Delpon
- Department of Radiotherapy and Nuclear Medicine Institut de Cancérologie de l’Ouest (ICO), F-44800 Saint-Herblain, France; (B.P.); (C.R.); (A.B.-L.); (G.D.); (L.F.); (V.L.); (F.K.-B.)
- Centre de Recherche en Cancéro-Immunologie Nantes Angers (CRCINA), Inserm U1232, CNRS ERL 6001, Université de Nantes, F-44000 Nantes, France;
| | - Ludovic Ferrer
- Department of Radiotherapy and Nuclear Medicine Institut de Cancérologie de l’Ouest (ICO), F-44800 Saint-Herblain, France; (B.P.); (C.R.); (A.B.-L.); (G.D.); (L.F.); (V.L.); (F.K.-B.)
- Centre de Recherche en Cancéro-Immunologie Nantes Angers (CRCINA), Inserm U1232, CNRS ERL 6001, Université de Nantes, F-44000 Nantes, France;
| | - Vincent Libois
- Department of Radiotherapy and Nuclear Medicine Institut de Cancérologie de l’Ouest (ICO), F-44800 Saint-Herblain, France; (B.P.); (C.R.); (A.B.-L.); (G.D.); (L.F.); (V.L.); (F.K.-B.)
| | - Matthieu Le Turnier
- Department of nuclear medicine and radiology, Centre Hospitalier Universitaire, F-44000 Nantes, France; (M.L.T.); (C.L.)
| | - Cédric Lenoble
- Department of nuclear medicine and radiology, Centre Hospitalier Universitaire, F-44000 Nantes, France; (M.L.T.); (C.L.)
| | - Caroline Bodet-Milin
- Centre de Recherche en Cancéro-Immunologie Nantes Angers (CRCINA), Inserm U1232, CNRS ERL 6001, Université de Nantes, F-44000 Nantes, France;
- Department of nuclear medicine and radiology, Centre Hospitalier Universitaire, F-44000 Nantes, France; (M.L.T.); (C.L.)
| | | | - Françoise Kraeber-Bodere
- Department of Radiotherapy and Nuclear Medicine Institut de Cancérologie de l’Ouest (ICO), F-44800 Saint-Herblain, France; (B.P.); (C.R.); (A.B.-L.); (G.D.); (L.F.); (V.L.); (F.K.-B.)
- Centre de Recherche en Cancéro-Immunologie Nantes Angers (CRCINA), Inserm U1232, CNRS ERL 6001, Université de Nantes, F-44000 Nantes, France;
- Department of nuclear medicine and radiology, Centre Hospitalier Universitaire, F-44000 Nantes, France; (M.L.T.); (C.L.)
| | - Stéphane Supiot
- Department of Radiotherapy and Nuclear Medicine Institut de Cancérologie de l’Ouest (ICO), F-44800 Saint-Herblain, France; (B.P.); (C.R.); (A.B.-L.); (G.D.); (L.F.); (V.L.); (F.K.-B.)
- Centre de Recherche en Cancéro-Immunologie Nantes Angers (CRCINA), Inserm U1232, CNRS ERL 6001, Université de Nantes, F-44000 Nantes, France;
- Correspondence: ; Tel.: +33-240679913; Fax: +33-240679722
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Drouard-de Rousiers E, Lucas L, Richard S, Consoli A, Mazighi M, Labreuche J, Kyheng M, Gory B, Dargazanli C, Arquizan C, Marnat G, Blanc R, Desal H, Bourcier R, Sibon I, Lapergue B, Piotin M, Blanc R, Redjem H, Escalard S, Desilles JP, Redjem H, Ciccio G, Smajda S, Mazighi M, Fahed R, Obadia M, Sabben C, Corabianu O, de Broucker T, Smadja D, Alamowitch S, Ille O, Manchon E, Garcia PY, Taylor G, Maacha MB, Wang A, Evrard S, Tchikviladze M, Afanasiev V, Ajili N, Sensenbrenner B, Lapergue B, Coskun O, Consoli A, Di Maria F, Rodesch G, Del Sette B, Russo R, Mizutani K, Leguen M, Gratieux J, Pico F, Rakotoharinandrasana H, Tassan P, Poll R, Nighoghossian N, Riva R, Eker O, Turjman F, Derex L, Cho TH, Mechtouff L, Lukaszewicz AC, Philippeau F, Cakmak S, Blanc-Lasserre K, Vallet AE, Marnat G, Gariel F, Barreau X, Berge J, Veunac L, Menegon P, Sibon I, Lucas L, Olindo S, Renou P, Sagnier S, Poli M, Debruxelles S, Bourcier R, Detraz L, Daumas-Duport B, Alexandre PL, Roy M, Lenoble C, L’allinec V, Girot JB, Desal H, de Gaalon S, Guillon B, Gory B, Bracard S, Anxionnat R, Braun M, Derelle AL, Tonnelet R, Liao L, Zhu F, Schmitt E, Planel S, Richard S, Humbertjean L, Mione G, Lacour JC, Bonnerot M, Riou-Comte N, Costa I, Chatelain A, Costalat V, Arquizan C, Dargazanli C, Gascou G, Lefèvre PH, Derraz I, Riquelme C, Gaillard N, et Lucas Corti IM, Francois E, Vannier S. Impact of Reperfusion for Nonagenarians Treated by Mechanical Thrombectomy. Stroke 2019; 50:3164-3169. [DOI: 10.1161/strokeaha.119.026448] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Purpose—
Nonagenarians represent a growing stroke population characterized by a higher frailty. Although endovascular therapy (ET) is a cornerstone of the management of acute ischemic stroke related to large vessel occlusion, the benefit of reperfusion among nonagenarians is poorly documented. We aimed to assess the impact of ET-related reperfusion on the functional outcome of reperfusion in this elderly population.
Methods—
A retrospective analysis of clinical and imaging data from all patients aged over 90 included in the ETIS (Endovascular Treatment in Ischemic Stroke) registry between October 2013 and April 2018 was performed. Association between post-ET reperfusion and favorable (modified Rankin Scale [0–2] or equal to prestroke value) and good (modified Rankin Scale [0–3] or equal to prestroke value) outcome were evaluated. Demographic and procedural predictors of functional outcome, including the first-pass effect, were evaluated. Results were adjusted for center, admission National Institutes of Health Stroke Scale, and use of intravenous thrombolysis.
Results—
Among the 124 nonagenarians treated with ET, those with successful reperfusion had the lowest 90-day modified Rankin Scale (odds ratio, 3.26; 95% CI, 1.04–10.25). Only patients with successful reperfusion after the first pass (n=53, 56.7%) had a reduced 90-day mortality (odds ratio, 0.15; 95% CI, 0.05–0.45) and an increased rate of good outcome (odds ratio, 4.55; 95% CI, 1.38–15.03). No increase in the rate of intracranial hemorrhage was observed among patients successfully reperfused.
Conclusions—
Successful reperfusion improves the functional outcome of nonagenarians who should not be excluded from ET. The first-pass effect should be considered in the procedural management of this frail population.
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Affiliation(s)
- Eve Drouard-de Rousiers
- From the Department of Neurology, Stroke Center (E.D.-d.R., B.L.), Foch Hospital, Suresnes, France
| | - Ludovic Lucas
- Department of Neurology, Stroke Unit, Bordeaux University Hospital, France (L.L.)
| | | | - Arturo Consoli
- Department of Interventional Neuroradiology (A.C), Foch Hospital, Suresnes, France
| | - Mikaël Mazighi
- Department of Interventional Neuroradiology, Fondation Rothschild Hospital, Paris, France (M.M., R. Blanc)
| | - Julien Labreuche
- University of Lille, University Hospital of Lille, EA2694 -Santé publique: épidémiologie et qualité des soins, France (J.L., M.K.)
| | - Maéva Kyheng
- University of Lille, University Hospital of Lille, EA2694 -Santé publique: épidémiologie et qualité des soins, France (J.L., M.K.)
| | - Benjamin Gory
- Department of Diagnostic and Therapeutic Neuroradiology, University Hospital of Nancy, France (B.G.)
| | - Cyril Dargazanli
- Department of Interventional Neuroradiology (C.D.), CHRU Gui de Chauliac, Montpellier, France
| | - Caroline Arquizan
- Department of Neurology (C.A.), CHRU Gui de Chauliac, Montpellier, France
| | - Gaultier Marnat
- Department of Diagnostic and Interventional Neuroradiology (G.M.), University Hospital of Bordeaux, France
| | - Raphaël Blanc
- Department of Interventional Neuroradiology, Fondation Rothschild Hospital, Paris, France (M.M., R. Blanc)
| | - Hubert Desal
- Department of Neuroradiology, University Hospital of Nantes, France (H.D., R. Bourcier)
| | - Romain Bourcier
- Department of Neuroradiology, University Hospital of Nantes, France (H.D., R. Bourcier)
| | - Igor Sibon
- Department of Neurology, Stroke Center (I.S.), University Hospital of Bordeaux, France
| | - Bertrand Lapergue
- From the Department of Neurology, Stroke Center (E.D.-d.R., B.L.), Foch Hospital, Suresnes, France
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Bourcier R, Le Scouarnec S, Bonnaud S, Karakachoff M, Bourcereau E, Heurtebise-Chrétien S, Menguy C, Dina C, Simonet F, Moles A, Lenoble C, Lindenbaum P, Chatel S, Isidor B, Génin E, Deleuze JF, Schott JJ, Le Marec H, Loirand G, Desal H, Redon R, Desal H, Bourcier R, Daumas-Duport B, Isidor B, Connault J, Lebranchu P, Le Tourneau T, Viarouge MP, Papagiannaki C, Piotin M, Redjem H, Mazighi M, Desilles JP, Naggara O, Trystram D, Edjlali-Goujon M, Rodriguez C, Ben Hassen W, Saleme S, Mounayer C, Levrier O, Aguettaz P, Combaz X, Pasco A, Berthier E, Bintner M, Molho M, Gauthier P, Chivot C, Costalat V, Darganzil C, Bonafé A, Januel AC, Michelozzi C, Cognard C, Bonneville F, Tall P, Darcourt J, Biondi A, Iosif C, Pomero E, Ferre JC, Gauvrit JY, Eugene F, Raoult H, Gentric JC, Ognard J, Anxionnat R, Bracard S, Derelle AL, Tonnelet R, Spelle L, Ikka L, Fahed R, Rouchaud A, Ozanne A, Caroff J, Ben Achour N, Moret J, Chabert E, Berge J, Marnat G, Barreau X, Gariel F, Clarencon F, Aggour M, Ricolfi F, Chavent A, Thouant P, Lebidinsky P, Lemogne B, Herbreteau D, Bibi R, Pierot L, Soize S, Labeyrie MA, Vandendries C, Houdart E, Kazemi A, Leclerc X, Pruvo JP, Gallas S, Velasco S. Rare Coding Variants in ANGPTL6 Are Associated with Familial Forms of Intracranial Aneurysm. Am J Hum Genet 2018; 102:133-141. [PMID: 29304371 DOI: 10.1016/j.ajhg.2017.12.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 12/05/2017] [Indexed: 10/18/2022] Open
Abstract
Intracranial aneurysms (IAs) are acquired cerebrovascular abnormalities characterized by localized dilation and wall thinning in intracranial arteries, possibly leading to subarachnoid hemorrhage and severe outcome in case of rupture. Here, we identified one rare nonsense variant (c.1378A>T) in the last exon of ANGPTL6 (Angiopoietin-Like 6)-which encodes a circulating pro-angiogenic factor mainly secreted from the liver-shared by the four tested affected members of a large pedigree with multiple IA-affected case subjects. We showed a 50% reduction of ANGPTL6 serum concentration in individuals heterozygous for the c.1378A>T allele (p.Lys460Ter) compared to relatives homozygous for the normal allele, probably due to the non-secretion of the truncated protein produced by the c.1378A>T transcripts. Sequencing ANGPTL6 in a series of 94 additional index case subjects with familial IA identified three other rare coding variants in five case subjects. Overall, we detected a significant enrichment (p = 0.023) in rare coding variants within this gene among the 95 index case subjects with familial IA, compared to a reference population of 404 individuals with French ancestry. Among the 6 recruited families, 12 out of 13 (92%) individuals carrying IA also carry such variants in ANGPTL6, versus 15 out of 41 (37%) unaffected ones. We observed a higher rate of individuals with a history of high blood pressure among affected versus healthy individuals carrying ANGPTL6 variants, suggesting that ANGPTL6 could trigger cerebrovascular lesions when combined with other risk factors such as hypertension. Altogether, our results indicate that rare coding variants in ANGPTL6 are causally related to familial forms of IA.
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Bourcier R, Lenoble C, Guyomarch-Delasalle B, Daumas-Duport B, Papagiannaki C, Redon R, Desal H. Is there an inherited anatomical conformation favoring aneurysmal formation of the anterior communicating artery? J Neurosurg 2016; 126:1598-1605. [PMID: 27315030 DOI: 10.3171/2016.4.jns153032] [Citation(s) in RCA: 6] [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] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The pathophysiological mechanisms responsible for the formation of intracranial aneurysms (IAs) remain only partially elucidated. However, current evidence suggests a genetic component. The purpose of this study was to investigate the specific anatomical variations in the arterial complex that are associated with the presence of anterior communicating artery (ACoA) aneurysms in the familial forms of IAs. METHODS This multicenter study investigated bifurcation IAs in patients who had a sporadic ACoA IA without a family history of IA (SACAA group), in patients who had an ACoA IA with a family history of IA (FACAA group), and in their healthy first-degree relatives (HFDRs). Through the use of MR angiography (MRA) reconstructions, the symmetry of the A1 segments and the angle between the A1 and A2 segments were analyzed on 3D models for each group. These measurements were then compared among the 3 groups. RESULTS Twenty-four patients with SACAA, 24 patients with FACAA, and 20 HFDRs were included in the study. Asymmetrical configuration of the A1 segments was more frequent in the FACAA group than in the HFDR group (p = 0.002). The aneurysm-side A1-A2 angle was lower in the FACAA group (p = 0.003) and SACAA group (p = 0.007) than in the HFDR group. On the contralateral side, there was no difference in A1-A2 angles between groups. CONCLUSIONS The anatomical shape of the ACoA complex seems to be similarly associated with the presence of ACoA IAs in both the FACAA and SACAA groups. This highlights the role played by hemodynamic constraints in aneurysm formation and questions the hypothesis of the hereditary character of these anatomical shapes.
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Affiliation(s)
- Romain Bourcier
- Department of Diagnostic and Interventional Neuroradiology, Hospital Guillaume et René Laennec.,CNRS, UMR 6291, Université de Nantes, Nantes; and
| | - Cédric Lenoble
- Department of Diagnostic and Interventional Neuroradiology, Hospital Guillaume et René Laennec
| | | | - Benjamin Daumas-Duport
- Department of Diagnostic and Interventional Neuroradiology, Hospital Guillaume et René Laennec
| | | | - Richard Redon
- INSERM, UMR1087, l'institut du thorax, CHU de Nantes.,CNRS, UMR 6291, Université de Nantes, Nantes; and
| | - Hubert Desal
- Department of Diagnostic and Interventional Neuroradiology, Hospital Guillaume et René Laennec.,CNRS, UMR 6291, Université de Nantes, Nantes; and
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Lenoble C, Guibert J, Lefebvre G, Dommergues M. Influence du poids sur les taux de succès en fécondation in vitro. ACTA ACUST UNITED AC 2008; 36:940-4. [DOI: 10.1016/j.gyobfe.2008.06.023] [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] [Received: 06/19/2008] [Accepted: 06/26/2008] [Indexed: 11/27/2022]
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Lenoble C, Kimata P, Carrasset G, Jouannic JM, Demaria F, Benifla JL. [Preterm corticosteroid therapy and fetal immobility. Case report]. ACTA ACUST UNITED AC 2004; 32:1054-6. [PMID: 15589782 DOI: 10.1016/j.gyobfe.2004.10.018] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2004] [Accepted: 10/08/2004] [Indexed: 10/26/2022]
Abstract
We report a case of fetal immobility following antenatal corticosteroid therapy administered to women in thirty weeks at risk of preterm labor. The short-term side effect of corticosteroid, a decrease in fetal heart rate variation are well known. This case report presents the difficulty of therapy choice in front of fetal immobility and acute fetal distress. We chose a medical supervision. A review of the literature suggests other criteria, such as Doppler of umbilical artery, which could help therapeutical choice.
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Affiliation(s)
- C Lenoble
- Service de gynécologie-obstétrique, hôpital Rothschild, 33, boulevard de Picpus, 75012 Paris, France
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Boehm E, Veksler V, Mateo P, Lenoble C, Wieringa B, Ventura-Clapier R. Maintained coupling of oxidative phosphorylation to creatine kinase activity in sarcomeric mitochondrial creatine kinase-deficient mice. J Mol Cell Cardiol 1998; 30:901-12. [PMID: 9618231 DOI: 10.1006/jmcc.1998.0692] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The importance of mitochondrial creatine kinase (mi-CK) in oxidative muscle was tested by studying the functional properties of in situ mitochondria in saponin-skinned muscle fibres from sarcomeric mi-CK-deficient (mutant) mice. Biochemical analyses showed that the lack of mi-CK in mutant muscle was associated with a decrease in specific activity of MM-CK in mutant ventricle, and increase in mutant soleus (oxidative) muscle. Lactate dehydrogenase activity and isoenzyme analysis showed an increased glycolytic metabolism in mutant soleus. No change was observed in ventricular muscle. In control animals, the apparent K(m) of mitochondrial respiration for ADP in ventricle and soleus (232 +/- 36 and 381 +/- 63 microM, respectively) was significantly reduced in the presence of creatine (52 +/- 8 and 45 +/- 12 microM, respectively). There was no change in the K(m) in oxidative fibres from mutant mice (258 +/- 27 and 399 +/- 66 microM, respectively) compared with control, though surprisingly, it was also significantly decreased in the presence of creatine (144 +/- 8 and 150 +/- 27 microM, respectively) despite the absence of mi-CK. It is proposed that in mutant (and perhaps normal) oxidative tissue, cytosolic MM-CK can relocate to the outer mitochondrial membrane, where it is coupled to oxidative phosphorylation by close proximity to porin, and the adenine nucleotide translocase. Such an effect can preserve the functioning of the CK shuttle and the energetic properties of mi-CK deficient tissue.
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Affiliation(s)
- E Boehm
- Laboratoire de Cardiologie Cellulaire et Moleculaire, INSERM U-446, Faculté de Pharmacie, Université Paris-Sud, Châtenay-Malabry, France
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Abstract
The photophysics and photochemistry of the 4'-diethylamino derivative of both 2-phenyl-benzothiazole and 2-(2'-hydroxyphenyl)benzothiazole have been studied by nanosecond and microsecond laser flash photolysis and picosecond emission spectroscopy. For the non-hydroxy substituted molecule, the singlet excited state was shown to relax primarily via fluorescence emission, and a very weak triplet transient was observed after laser flash excitation. The 2-(2'-hydroxy-4'-diethylaminophenyl)benzothiazole (AHBT) was shown to undergo excited state intramolecular proton transfer (ESIPT) in the picosecond timescale (k greater than 3 x 10(10) s-1) to form a colored zwitter-ion/keto form in solution at room temperature while the ground state back proton transfer was slower by a factor of approximately 10(5). However, in marked contrast with other derivatives of 2-(2'-hydroxyphenyl)benzothiazole and related molecules, the ESIPT was not the only deactivation process of the lowest singlet excited state of the enol form. Under steady-state excitation at room temperature (and low temperature), the fluorescence emission of the enol form was observed. The T-T absorption of the enol form was also observed and furthermore, the ESIPT was shown to have an activation energy which was estimated to be approximately 4 kJ. None of the foregoing, fluorescence and T-T absorption of the enol nor activation energy for proton transfer have been observed for the parent or derivatives of 2-(2'-hydroxyphenyl)benzothiazoles. The striking new features for the ESIPT photochemistry and photophysics for the 4'-diethylamino derivative of 2-(2'-hydroxyphenyl)benzothiazole are discussed and MO calculations are used to aid in the interpretation of some of the experimental results.
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Affiliation(s)
- C Lenoble
- Department of Chemistry, University of Houston-University Park, TX 77204
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