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An important breakthrough at the IRCM associated with osteoporosis
Date:10/4/2011

Montral, October 4, 2011 Researchers at the Institut de recherches cliniques de Montral (IRCM), directed by Dr. Jean Vacher, identified a new gene that modulates bone mass and that could become a risk factor for developing osteoporosis. This scientific breakthrough will be published tomorrow in the scientific journal Cell Metabolism.

Osteoporosis is a "silent" genetic disease characterized by low bone mineral density and deterioration of bone tissue, which leads to increased bone fragility and risk of fracture. In all cases, the disease is caused by an imbalance between the formation and resorption of bone tissue.

"The overall objective of our research is to understand the molecular and cellular mechanisms that determine the balance between bone formation and resorption (breakdown)," explains Dr. Vacher, Director of the Cellular Interactions and Development research unit at the IRCM. "Osteoblasts are responsible for making bones and work in synergy with osteoclasts, which reshape the bone. To gain insight into these complex mechanisms, we are studying the role of new genes that influence osteoclasts and osteoblasts."

The team of researchers recently isolated a gene that modulates osteoclasts. They found, in mice, that a loss of this gene's function leads to a significant increase in the number of osteoclasts, thereby generating an even higher level of bone resorption.

"We identified this gene as a novel modulator of bone mineral density in mice and humans," adds Dr. Vacher. "More importantly, we showed that the human gene could represent a new susceptibility factor for osteoporosis. Hence, this discovery will help identify individuals with a greater predisposition to the disease who could benefit from preventive measures."

According to Osteoporosis Canada, as many as two million Canadians suffer from osteoporosis. One in four women over the age of 50 has osteoporosis, and so does one in eight men over the same age. In addition, 80 per cent of hip fractures are related to the disease. These result in death in up to 20 per cent of cases, and disability in 50 per cent of those who survive.

Mathieu Ferron, graduate student from Dr. Vacher's laboratory, is the article's first author. This research project was conducted in collaboration with scientists at Universit Laval in Qubec and Washington University School of Medicine in Saint Louis.

Research carried out at the IRCM was funded by the Canadian Institutes of Health Research (CIHR) and the Natural Sciences and Engineering Research Council of Canada (NSERC). For more information on this discovery, please refer to the article summary published in Cell Metabolism.


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Contact: Julie Langelier
julie.langelier@ircm.qc.ca
514-987-5555
Institut de recherches cliniques de Montreal
Source:Eurekalert

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