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Bourgeois G, Grange P, Saint Pastou Terrier C, Koumar Y, Manaquin R, Zemali N, Poubeau P, Dupin N, Jaubert J, Bertolotti A. Résistance de Treponema pallidum à l’azithromycine dans un département d’Outre-mer. Med Mal Infect 2019. [DOI: 10.1016/j.medmal.2019.04.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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52
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Devos S, Camuset G, Thore E, Porcher M, Manaquin R, Gaud C, Menudier L, Poubeau P, Rodet R, Bertolotti A. Augmentation du nombre de syphilis chez les jeunes hétérosexuels dans un DOM : données de la surveillance régionale de 2007 à 2017. Med Mal Infect 2019. [DOI: 10.1016/j.medmal.2019.04.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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53
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Duval C, Thore E, Bruneau L, Camuset G, Ricou-Berthelot A, Jaubert J, Von Theobald P, Franco JM, Poubeau P, Bertolotti A. Prévalence de Chlamydia trachomatis chez les femmes consultant en centres de dépistage à la Réunion : étude transversale. Ann Dermatol Venereol 2018. [DOI: 10.1016/j.annder.2018.09.474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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54
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Lewinski A, Foucher A, Regent A, Marcais A, Duquenne S, Ortonne N, Hermine O, Klisnick J, Cabrera Q, Bertolotti A. Leucémie/lymphome T de l’adulte à HTLV-1 associée à une vascularite paranéoplasique. Ann Dermatol Venereol 2018. [DOI: 10.1016/j.annder.2018.09.429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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55
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Krzyzosiak A, Sigurdardottir A, Luh L, Carrara M, Das I, Schneider K, Bertolotti A. Target-Based Discovery of an Inhibitor of the Regulatory Phosphatase PPP1R15B. Cell 2018; 174:1216-1228.e19. [PMID: 30057111 PMCID: PMC6108835 DOI: 10.1016/j.cell.2018.06.030] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 05/07/2018] [Accepted: 06/13/2018] [Indexed: 11/13/2022]
Abstract
Protein phosphorylation is a prevalent and ubiquitous mechanism of regulation. Kinases are popular drug targets, but identifying selective phosphatase inhibitors has been challenging. Here, we used surface plasmon resonance to design a method to enable target-based discovery of selective serine/threonine phosphatase inhibitors. The method targeted a regulatory subunit of protein phosphatase 1, PPP1R15B (R15B), a negative regulator of proteostasis. This yielded Raphin1, a selective inhibitor of R15B. In cells, Raphin1 caused a rapid and transient accumulation of its phosphorylated substrate, resulting in a transient attenuation of protein synthesis. In vitro, Raphin1 inhibits the recombinant R15B-PP1c holoenzyme, but not the closely related R15A-PP1c, by interfering with substrate recruitment. Raphin1 was orally bioavailable, crossed the blood-brain barrier, and demonstrated efficacy in a mouse model of Huntington's disease. This identifies R15B as a druggable target and provides a platform for target-based discovery of inhibitors of serine/threonine phosphatases.
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Tabard C, Maillard O, Mohand-oussaid D, Saidy H, Bourree P, Cazal Y, Bertolotti A. La lèpre dans un Département d’outre-mer : étude des nouveaux cas entre 2006 et 2015. Med Mal Infect 2018. [DOI: 10.1016/j.medmal.2018.04.299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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57
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Gérardin P, Rollot O, Maillard O, Mussard C, Porcherat S, Lenclume V, Fianu A, Bertolotti A, Huiart L, Marimoutou C. Qualité de vie à 10–11 ans d’une épidémie de Chikungunya : étude en population générale. Med Mal Infect 2018. [DOI: 10.1016/j.medmal.2018.04.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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58
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Zemali N, Picot S, Naze F, Rouger E, Manaquin R, Koumar Y, Bertolotti A, Jaubert J. Examen microbiologique des selles par biologie moléculaire : retour d’expérience d’un CHU d’outre-mer sur 3 ans. Med Mal Infect 2018. [DOI: 10.1016/j.medmal.2018.04.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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59
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Thomas E, Bertolotti A, Barreau A, Klisnick J, Tournebize P, Borgherini G, Zemali N, Jaubert J, Jouvion G, Bretagne S, Picot S. From phaeohyphomycosis to disseminated chromoblastomycosis: A retrospective study of infections caused by dematiaceous fungi. Med Mal Infect 2018; 48:278-285. [PMID: 29656841 DOI: 10.1016/j.medmal.2017.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/30/2016] [Accepted: 09/12/2017] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Infections caused by dematiaceous fungi are more common in tropical and subtropical areas. We aimed to describe the clinical, microbiological and therapeutic aspects of case patients diagnosed at a University Hospital located on an Indian Ocean island. PATIENTS AND METHODS We performed an observational retrospective study of infections caused by dematiaceous fungi diagnosed at the University Hospital of Saint-Pierre, Reunion, from 2000 to 2015. Mycological identifications were performed at the National Reference Center for Invasive Mycosis and Antifungal Agents (Paris). RESULTS The review of clinical and microbiological data of 11 patients identified revealed that five were infected by dematiaceous fungi. Two had cutaneous phaeohyphomycosis, two had cerebral phaeohyphomycosis and one had cutaneous chromoblastomycosis with brain and potentially medullary dissemination. Skin lesions and cerebral abscesses were quite varied. CONCLUSION Infections caused by dematiaceous fungi are rare. Medullary and brain localizations are extremely rare, especially for chromoblastomycosis. Cutaneous manifestations of phaeohyphomycosis are varied; diagnosis is thus more difficult. It is therefore important, when confronted with a chronic tumor-like lesion in endemic areas, to perform a biopsy for pathology and fungal culture. While surgical excision is not always sufficient, medical treatment of these infections is not standardized, but relies on an azole, which can be associated with another antifungal agent.
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Bertolotti A. Importance of the subcellular location of protein deposits in neurodegenerative diseases. Curr Opin Neurobiol 2018; 51:127-133. [PMID: 29631171 DOI: 10.1016/j.conb.2018.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/04/2018] [Accepted: 03/12/2018] [Indexed: 12/26/2022]
Abstract
Alzheimer's disease, Parkinson's, Huntington's, amyotrophic lateral sclerosis (ALS) and prion disorders are devastating neurodegenerative diseases of increasing prevalence in aging populations. Although clinically different, they share similar molecular features: the accumulation of one or two proteins in abnormal conformations inside or outside neurons. Enhancing protein quality control systems could be a useful strategy to neutralize the abnormal proteins causing neurodegenerative diseases. This review emphasizes the subcellular location of protein deposits in neurodegenerative diseases and the need to tailor strategies aimed at boosting protein quality control systems to the affected subcellular compartment. Inhibition of a protein phosphatase terminating the unfolded protein response will be discussed as a strategy to protect from diseases associated with misfolded proteins in the endoplasmic reticulum.
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Zhong Z, Grasso L, Sibilla C, Stevens TJ, Barry N, Bertolotti A. Prion-like protein aggregates exploit the RHO GTPase to cofilin-1 signaling pathway to enter cells. EMBO J 2018; 37:embj.201797822. [PMID: 29496740 DOI: 10.15252/embj.201797822] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 01/16/2018] [Accepted: 01/24/2018] [Indexed: 01/01/2023] Open
Abstract
Protein aggregation is a hallmark of diverse neurodegenerative diseases. Multiple lines of evidence have revealed that protein aggregates can penetrate inside cells and spread like prions. How such aggregates enter cells remains elusive. Through a focused siRNA screen targeting genes involved in membrane trafficking, we discovered that mutant SOD1 aggregates, like viruses, exploit cofilin-1 to remodel cortical actin and enter cells. Upstream of cofilin-1, signalling from the RHO GTPase and the ROCK1 and LIMK1 kinases controls cofilin-1 activity to remodel actin and modulate aggregate entry. In the spinal cord of symptomatic SOD1G93A transgenic mice, cofilin-1 phosphorylation is increased and actin dynamics altered. Importantly, the RHO to cofilin-1 signalling pathway also modulates entry of tau and α-synuclein aggregates. Our results identify a common host cell signalling pathway that diverse protein aggregates exploit to remodel actin and enter cells.
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Bertolotti A, Ferdynus C, Milpied B, Dupin N, Huiart L, Derancourt C. Efficacité des traitements locaux sur les condylomes anogénitaux externes : méta-analyse en réseau. Ann Dermatol Venereol 2017. [DOI: 10.1016/j.annder.2017.09.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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63
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Salinas-de-León P, Bertolotti A, Chong-Montenegro C, Gomes-Do-Régo M, Preziosi RF. Reproductive biology of the Endangered white‑spotted sand bass Paralabrax albomaculatus endemic to the Galapagos Islands. ENDANGER SPECIES RES 2017. [DOI: 10.3354/esr00858] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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64
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Pilla E, Bertolotti A. Decoding the Protein Destruction Code: A Panoramic View. Mol Cell 2017; 63:915-7. [PMID: 27635757 DOI: 10.1016/j.molcel.2016.08.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Proteasome degradation is essential, but the intrinsic features of a protein that signals its destruction remain incompletely understood. In this issue of Molecular Cell, Geffen et al. (2016) report an unbiased and proteome-wide method that provided insights into the protein destruction signals and pathways.
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Sibilla C, Bertolotti A. Prion Properties of SOD1 in Amyotrophic Lateral Sclerosis and Potential Therapy. Cold Spring Harb Perspect Biol 2017; 9:cshperspect.a024141. [PMID: 28096265 DOI: 10.1101/cshperspect.a024141] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a devastating and rapidly progressive neurodegenerative disease caused by the deterioration of motor neurons. The first symptoms of ALS always begin at a focal but variable site and consistently spread to neighboring regions, suggesting that neurodegeneration in ALS is an orderly and propagating process. Like other neurodegenerative diseases, misfolding of a specific protein is central to ALS. SOD1, the major constituent of the protein deposits in some familial and sporadic forms of ALS, propagates its misfolded conformation like prions, providing a plausible molecular basis for the focality and spreading of muscle weakness in ALS. Because protein misfolding is a common cause of diverse neurodegenerative diseases, strategies aimed at boosting a cell's ability to cope with misfolded proteins could lead to therapeutics to combat these devastating age-related proteinopathies.
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Bertolotti A. STRATEGIES TO SURVIVE THE LOSS OF CELLULAR RESILENCE TO PROTEIN MISFOLDING IN AGING. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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68
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Bertolotti A, Cuervo A. POSTTRANSLATIONAL MODULATION OF MACROMOLECULES DURING AGING. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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69
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Zemali N, Gérardin P, Bactora M, Camuset G, Bertolotti A, Pagès F, Picot S, Michault A, Tortosa P, Jaubert J. Séroprévalence des rickettsioses dans une région d’outre-mer. Med Mal Infect 2017. [DOI: 10.1016/j.medmal.2017.03.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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70
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Grouteau G, Lancelot O, Poubeau P, Manaquin R, Foucher A, Bertolotti A, Jaubert J, Pagès F, Camuset G, Parola P. Le Typhus murin dans l’océan Indien : caractéristiques cliniques, biologiques, et épidémiologiques. Med Mal Infect 2017. [DOI: 10.1016/j.medmal.2017.03.279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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71
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Jaubert J, Atiana L, Devos P, Somon-Payet C, Robillard P, Bertolotti A, Larrieu S, Picot S, Boukerrou M, Gérardin P. Séroprévalence de la fièvre Q chez les accouchées. Med Mal Infect 2017. [DOI: 10.1016/j.medmal.2017.03.168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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72
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Pacienza N, Santa-Cruz D, Marcos M, Robledo O, Lemus G, Bertolotti A, Yannarelli G. Anti-Inflammatory Effect of Mesenchymal Stem Cells Facilitates Lung Preservation. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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73
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Bordes P, Laboute E, Bertolotti A, Dalmay JF, Puig P, Trouve P, Verhaegue E, Joseph PA, Dehail P, De Seze M. No beneficial effect of bracing after anterior cruciate ligament reconstruction in a cohort of 969 athletes followed in rehabilitation. Ann Phys Rehabil Med 2017; 60:230-236. [PMID: 28259710 DOI: 10.1016/j.rehab.2017.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 02/02/2017] [Accepted: 02/03/2017] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Compare the clinical outcomes of different knee braces in the early phase of rehabilitation after anterior cruciate ligament reconstruction (ACLR) in athletes. MATERIALS AND METHODS We conducted a retrospective database study of athletes during early rehabilitation in a tertiary referral hospital between 1 February 2008 and 30 October 2010 after ACLR using bone patellar tendon bone (BPTB) or hamstring autograft. Differences in mid-patellar knee circumference, pain, and range of motion were assessed at admission. All patients followed the same rehabilitation protocol. Patients who had complications preventing them from following the assigned rehabilitation program were analyzed separately. Patients who completed their rehabilitation program were also assessed for thigh muscle atrophy, extension deficit≥2°, quality of walking, PPLP1 and subjective IKDC scores. The type and frequency of complications and their frequency was documented. The above-mentioned parameters were analyzed in 3 different groups: rigid brace in full extension, articulated brace (0°-90° for first 3 weeks then 0-120°) or no brace. RESULTS The analysis included 969 patients. Rehabilitation started at 4.5±2.9 days after surgery and ended at 32.4±3.0 days postoperative. At the beginning, flexion was lower in patients with a rigid brace (P<0.01). There was no difference in the frequency or severity of complications between the three study groups, nor was there a significant difference in the clinical outcomes listed above. CONCLUSION Postoperative bracing after ACLR has not beneficial effect on clinical outcomes and the complication rate. Patients who wore the rigid brace had limited flexion early on.
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Bertolotti A, Zemali N, Manaquin R, Borgherini G, Foucher A, Jaubert J, Picot S, Gerardin P, Poubeau P, Camuset G. Impact de Mycoplasma genitalium dans un CDAG d’outre-mer à la lumière des autres maladies sexuellement transmissibles : étude transversale. Ann Dermatol Venereol 2016. [DOI: 10.1016/j.annder.2016.09.490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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75
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Bertolotti A, Dupin N, Fouere S, Cabie A, Milpied B, Derancourt C. Efficacité des traitements locaux sur les condylomes ano-génitaux externes : revue systématique avec pool de données et méta-analyses. Ann Dermatol Venereol 2016. [DOI: 10.1016/j.annder.2016.09.262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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