Team 1- Myomatrix & Myonucleus Related Diseases: Genetics & Pathophysiology

Team leader : Gisèle Bonne

The team research topics focus on 2 groups of neuromuscular disorders (NMD): myopathies due to defects of the Myomatrix [collagen type VI & ECM-related disorders (Allamand et al. 2011, Skelet Muscle); V Allamand’s group] and of the Myonucleus [Emery-Dreifuss muscular dystrophies (EDMD) & other striated muscle laminopathies (SML) due to mutations of the LMNA gene encoding A-type lamins or genes encoding related nuclear envelope components (Bertrand et al. 2011, Biochem Soc Trans.; Azibani et al. 2014, Semin Cell Dev Biol); Group G Bonne/ AT Bertrand]. These myopathies with prominent contractures or ‘contractural myopathies’ share some clinical features, and may be differentially diagnosed.

These diseases are highly heterogeneous, both clinically and genetically, and no treatment is available yet. Our previous activities have led to the identification of genetic defects, the development of tools (cellular and animal models) and the deciphering of pathophysiological clues for a better comprehension of the molecular bases and the identification of therapeutic targets. Many unresolved issues remain: 1) absence of molecular diagnosis for a subset of patients, 2) precise function of implicated proteins and underlying pathophysiological mechanisms… Several common points (contractile dysfunction, mechanobiology defects, fibrosis…) have been and are still being addressed transversally through pooling of our specific expertise (nuclear envelop, nucleoplasm, extracellular matrix…).

The team’s project revolves around 3 axes:
1) defining the genetic and clinical spectrum and the natural history of these NMDs;
2) investigating the pathophysiological mechanisms of gene mutations that induce these cardiac and/or skeletal muscle affections with the overall goal
3) to identify and test therapeutic avenues for these disorders. This is carried out on biological material from patients (DNA, RNA, cultured cells and biopsies) as well as various animal models we have developed.

 

Team members

MyoNucleus related diseases

A Bertrand, CR AIM
G Bonne, DR1 Inserm

 MyoMatrix related diseases

V Allamand, DR2 Inserm
Genetics & NGS

G Bonne, DR1 Inserm
V Allamand, DR2 Inserm

L Benarroch, Post-doc (CDD)
A Brull Cañagueral, Post-doc (CDD)
M Mainard, Stagiaire M2
C Gartioux, TR, AIM
A Serafin, Stagiaire M2
I Nelson, IR AIM
E Cohen, Post Doc (CDD)

 

Transversal Activities, G Bonne, DR1 Inserm

Clinical expertise

 

D Duboc, PU-PH (5%)
F Leturcq, PH, AP (10%)
C Metay, PH, AP (10 %)
T Stojkovic, PH, AP (10%)

Data bases & Registries

 

R Ben Yaou, PH attaché, AIM (30%)
K Chikhaoui, ARC, AIM (30%)
A Atalaia, Chercheur (CDD)

Histopathology

 

M Beuvin, IE, AIM
T Evangelista, PH attaché, AP/AIM (10%)

 

Contacts

Gisèle Bonne  (g.bonne@institut-myologie.org)
Valérie Allamand (v.allamand@institut-myologie.org)
Anne Bertrand (a.bertrand@institut-myologie.org)