Université de Fribourg

EEF1A1 deacetylation enables transcriptional activation of remyelination

Duman, Mert ; Vaquié, Adrien ; Nocera, Gianluigi ; Heller, Manfred ; Stumpe, Michael ; Sankar, Devanarayanan Siva ; Dengjel, Jörn ; Meijer, Dies ; Yamaguchi, Teppei ; Matthias, Patrick ; Zeis, Thomas ; Schaeren-Wiemers, Nicole ; Hayoz, Antoinette ; Ruff, Sophie ; Jacob, Claire

In: Nature Communications, 2020, vol. 11, no. 1, p. 3420

Remyelination of the peripheral and central nervous systems (PNS and CNS, respectively) is a prerequisite for functional recovery after lesion. However, this process is not always optimal and becomes inefficient in the course of multiple sclerosis. Here we show that, when acetylated, eukaryotic elongation factor 1A1 (eEF1A1) negatively regulates PNS and CNS remyelination. Acetylated eEF1A1...

Université de Fribourg

Injured axons instruct schwann cells to build constricting actin spheres to accelerate axonal disintegration

Vaquié, Adrien ; Sauvain, Alizée ; Duman, Mert ; Nocera, Gianluigi ; Egger, Boris ; Meyenhofer, Felix ; Falquet, Laurent ; Bartesaghi, Luca ; Chrast, Roman ; Lamy, Christophe Maurice ; Bang, Seokyoung ; Lee, Seung-Ryeol ; Jeon, Noo Li ; Ruff, Sophie ; Jacob, Claire

In: Cell Reports, 2019, vol. 27, no. 11, p. 3152-3166.e7

After a peripheral nerve lesion, distal ends of injured axons disintegrate into small fragments that are subsequently cleared by Schwann cells and later by macrophages. Axonal debris clearing is an early step of the repair process that facilitates regeneration. We show here that Schwann cells promote distal cut axon disintegration for timely clearing. By combining cell-based and in vivo...

Consortium of Swiss Academic Libraries

How Histone Deacetylases Control Myelination

Jacob, Claire ; Lebrun-Julien, Frédéric ; Suter, Ueli

In: Molecular Neurobiology, 2011, vol. 44, no. 3, p. 303-312

Université de Fribourg

Chromatin-remodeling enzymes in control of Schwann cell development, maintenance and plasticity

Jacob, Claire

In: Current Opinion in Neurobiology, 2017, vol. 47, p. 24–30

Gene regulation is essential for cellular differentiation and plasticity. Schwann cells (SCs), the myelinating glia of the peripheral nervous system (PNS), develop from neural crest cells to mature myelinating SCs and can at early developmental stage differentiate into various cell types. After a PNS lesion, SCs can also convert into repair cells that guide and stimulate axonal regrowth, and...

Université de Fribourg

Delaying histone deacetylase response to injury accelerates conversion into repair Schwann cells and nerve regeneration

Brügger, Valérie ; Duman, Mert ; Bochud, Maëlle ; Münger, Emmanuelle ; Heller, Manfred ; Ruff, Sophie ; Jacob, Claire

In: Nature Communications, 2017, vol. 8, p. 14272

The peripheral nervous system (PNS) regenerates after injury. However, regeneration is often compromised in the case of large lesions, and the speed of axon reconnection to their target is critical for successful functional recovery. After injury, mature Schwann cells (SCs) convert into repair cells that foster axonal regrowth, and redifferentiate to rebuild myelin. These processes require...

Université de Fribourg

Mature lipid droplets are accessible to ER luminal proteins

Mishra, Shirish ; Khaddaj, Rasha ; Cottier, Stéphanie ; Stradalova, Vendula ; Jacob, Claire ; Schneiter, Roger

In: Journal of Cell Science, 2016, vol. 129, no. 20, p. 3803–3815

Lipid droplets are found in most organisms where they serve to store energy in the form of neutral lipids. They are formed at the endoplasmic reticulum (ER) membrane where the neutral-lipid-synthesizing enzymes are located. Recent results indicate that lipid droplets remain functionally connected to the ER membrane in yeast and mammalian cells to allow the exchange of both lipids and integral...

Université de Fribourg

Transcriptional control of neural crest specification into peripheral glia

Jacob, Claire

In: Glia, 2015, p. –

The neural crest is a transient migratory multipotent cell population that originates from the neural plate border and is formed at the end of gastrulation and during neurulation in vertebrate embryos. These cells give rise to many different cell types of the body such as chondrocytes, smooth muscle cells, endocrine cells, melanocytes, and cells of the peripheral nervous system including...

Université de Fribourg

HDAC1 and HDAC2 Control the specification of neural crest cells into peripheral glia

Jacob, Claire ; Lötscher, Pirmin ; Engler, Stefanie ; Baggiolini, Arianna ; Tavares, Sandra Varum ; Brügger, Valérie ; John, Nessy ; Büchmann-Møller, Stine ; Snider, Paige L. ; Conway, Simon J. ; Yamaguchi, Teppei ; Matthias, Patrick ; Sommer, Lukas ; Mantei, Ned ; Suter, Ueli

In: The Journal of Neuroscience, 2014, vol. 34, no. 17, p. 6112–6122

Schwann cells, the myelinating glia of the peripheral nervous system (PNS), originate from multipotent neural crest cells that also give rise to other cells, including neurons, melanocytes, chondrocytes, and smooth muscle cells. The transcription factor Sox10 is required for peripheral glia specification. However, all neural crest cells express Sox10 and the mechanisms directing neural crest...

Université de Fribourg

Histone methylation in the nervous system : functions and dysfunctions

Pattaroni, Céline ; Jacob, Claire

In: Molecular Neurobiology, 2013, vol. 47, no. 2, p. 740-756

Chromatin remodeling is a key epigenetic process controlling the regulation of gene transcription. Local changes of chromatin architecture can be achieved by post-translational modifications of histones such as methylation, acetylation, phosphorylation, ubiquitination, sumoylation, and ADP-ribosylation. These changes are dynamic and allow for rapid repression or de-repression of specific target...