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Molecular mechanisms of grouth, osteogenesis and osteolysis, biotherapy

Head : Jean Pierre Salles

Scientific objective :

-Physiopathology of rare disorders of growth and osteogenesis related to sensitivity to hormones, including growth hormone (GH), IGF1, and ghrelin are studied. Prader-Willi syndrome and Noonan syndrome are topics of the team, with study of the regulation of intracellular pathways involving PI3-kinase, GAB1 and SHP2 proteins.
-Pathophysiology of idiopathic scoliosis, cellular abnormalities associated with the activation of intracellular pathways involving Gi protein (ghrelin, lysophosphatidic acid).
- Biology of lysophosphatidic acid (LPA) in osteogenesis and bone resorption; study of the paracrine role of LPA related to the activation of its receptors, including LPA1. Involvement of lipid mediators (lysophospholipids, endocannabinoids) in biochemical and biological models, in bone biology and chronic arthritis.
- Biotherapy of chronic arthritis by the use of phosphorus dendrimers.


Main publications :

Fruchon S, Mouriot S, Thiollier T, Grandin C, Caminade AM, Turrin CO, Contamin H, Poupot R.
Repeated intravenous injections in non-human primates demonstrate preclinical safety of an anti-inflammatory phosphorus-based dendrimer.
Nanotoxicology. 2014 Jul 22:1-9. [Epub ahead of print]

Tauber M, Diene G, Mimoun E, Çabal-Berthoumieu S, Mantoulan C, Molinas C, Muscatelli F, Salles JP.
Prader-Willi syndrome as a model of human hyperphagia.
Front Horm Res. 2014;42:93-106. doi: 10.1159/000358317. Epub 2014 Apr 7.

Cadoudal T, Buléon M, Sengenès C, Diene G, Desneulin F, Molinas C, Eddiry S, Conte-Auriol F, Daviaud D, Martin PG, Bouloumié A, Salles JP, Tauber M, Valet P.
Impairment of adipose tissue in Prader-Willi syndrome rescued by growth hormone treatment.
Int J Obes (Lond). 2014 Sep;38(9):1234-40. doi: 10.1038/ijo.2014.3. Epub 2014 Jan 10.

Degboé Y, Fruchon S, Baron M, Nigon D, Turrin CO, Caminade AM, Poupot R, Cantagrel A, Davignon JL.
Modulation of pro-inflammatory activation of monocytes and dendritic cells by aza-bis-phosphonate dendrimer as an experimental therapeutic agent.
Arthritis Res Ther. 2014 Apr 18;16(2):R98. doi: 10.1186/ar4546.

Fruchon S, Caminade AM, Abadie C, Davignon JL, Combette JM, Turrin CO, Poupot R.
An azabisphosphonate-capped poly(phosphorhydrazone) dendrimer for the treatment of endotoxin-induced uveitis.
Molecules. 2013 Aug 5;18(8):9305-16. doi: 10.3390/molecules18089305.

Davignon JL, Hayder M, Baron M, Boyer JF, Constantin A, Apparailly F, Poupot R, Cantagrel A.
Targeting monocytes/macrophages in the treatment of rheumatoid arthritis.
Rheumatology (Oxford). 2013 Apr;52(4):590-8. doi: 10.1093/rheumatology/kes304. Epub 2012 Nov 30. Review

Last updated December 1, 2014

Version française

French version

Key words

PI3 kinase.
Noonan syndrome
Prader Willi syndrome
GH, IGF1, Ghreline, FGFR3

Expected health effects

These projects have a strong impact in different fields of pathophysiology, including mitogenesis, hormone sensitivity and growth retardation in the context of rare diseases.
Centre de physiopathologie de Toulouse Purpan - CHU Purpan - BP 3028 31024 Toulouse Cedex 3
Inserm University of Toulouse Université Toulouse III - Paul Sabatier