Loading Events

« All Events

Thesis defense – Marie-Laure Arotcarena

Monday 30 September 2019 / 14:00

Multifactorial and translational approaches for modeling synucleinopathies : mechanistic and thérapeutique implications., Approches multifactorielles et translationnelles dans la modélisation des synucléinopathies : implications mécanistiques et thérapeutiques

Venue: Centre Broca Nouvelle-Aquitaine / Salle de conférence


Marie-Laure Arotcarena
IMN – Pathophysiology of parkinsonian syndromes

Thesis supervisor : Benjamin Dehay

Summary

My thesis project was dedicated to the study of synucleinopathies. Synucleinopathies are neurodegenerative diseases characterized by the presence of a-synuclein positive intracytoplasmic inclusions which are present either in neurons for Parkinson’s disease (i.e. Lewy Bodies) or in oligodendrocytes for Multiple system atrophy (i.e. Glial Cytoplasmic Inclusions). The aim of my work was to establish a multifactorial and translational approach through modeling, mechanistic and therapeutic aspects associated with synucleinopathies. First, we focused on dissecting the underlying a-synuclein-mediated mechanisms of neurodegeneration using a non-human primate model of Parkinson’s disease. We confirmed the toxic role of a-synuclein in the pathology and highlighted unpredictable cellular processes involved in neurodegeneration. Using the same Parkinson’s disease model, we studied the hypothesis of a pathological propagation between the central and peripheric nervous systems in an attempt to decipher the initiation point and the direction of propagation of the associated pathology. We thus demonstrated a bidirectional route of propagation of α-synuclein between the CNS and the ENS and within the ENS. Finally, we focused on the restoration of the autophagic function as a potential common therapeutic target for all synucleinopathies. We demonstrated through a gene-based restoration of the autophagy, we efficiently reestablish a-synuclein physiological protein levels, while inducing neuroprotection in a Parkinson’s disease and Multiple system atrophy rodent models. Thus, this work corroborates the key role of a-synuclein in the etiology of synucleinopathy and offers new common therapeutic strategies for all synucleinopathies to decrease a-synuclein-induced toxicity into the central nervous system.

Publications

En révision :

Arotcarena, M.L; Dovero, S; Prigent, A; Bourdenx, M; and al., Bidirectional gut-to-brain and brain-to-gut propagation of α-synuclein pathology in non-human primates. 1st co-author.

Arotcarena, M.L; Bourdenx, M and al., TFEB prevents neurodegeneration in synucleinopathies. 1st co-author.

Bourdenx, M; Nioche, A; Dovero, S; Arotcarena M.L and al., Machine learning reveals different pathological signatures of patient-derived α-synuclein extracts in non-human primates. 1st co-author.

Publié :

Arotçarena, M.L and B. Dehay, Les synucléinopathies sont-elles des maladies à prions ? Pratique Neurologique FMC (2018), 2018. https://doi.org/10.1016/j.praneu.2018.02.006

Arotcarena ML, Teil M, Dehay B (2019) Autophagy in Synucleinopathy: The Overwhelmed and Defective Machinery. Cells (2019), 8(6), 565; https://doi.org/10.3390/cells8060565

Jury

Nadine Camougrand (DR2, CNRS) – IBGC – Bordeaux (Présidente du jury)

Olga Corti (DR2, INSERM) – Institut du cerveau et de la Moelle épinière (ICM), Paris (Rapporteur)

Philippe Hantraye (DR1, CNRS) – Institut de Biologie François Jacob, MIRCen, CEA, Paris-Saclay (Rapporteur)

Coming soon

  1. Monthly conference (PhD seminar series) – Laurent Bourdieu

    Friday 6 September 2019 / 11:30

    Fast 3D imaging of neuronal activity in visual cortex across multiple layers in awake mice

  2. Cajal lectures : Whole brain imaging

    Monday 9 September 2019 - Friday 27 September 2019

    Free entrance lectures / Venue: CGFB

  3. Seminar – Francesco Papaleo

    Friday 13 September 2019 / 11:30

    Bottom-Up and Top-Down Control of Emotion Recognition.

  4. LabEx TRAIL scientific day

    Monday 16 September 2019 / 14:00 - 18:00

    Dedicated to brain connectivity.

  5. Synapse Day

    Tuesday 17 September 2019

    Centre Broca Nouvelle-Aquitaine


Conférence internationale : REWARD

Du 2 au 4 octobre

L’événement en un coup d’oeil :
télécharger le livret (programme,
inscription, soumission d’abstract…)

brainconf.u-bordeaux.fr

Details

Date:
Monday 30 September 2019
Time:
14:00
Event Category: