麻豆传媒

News — A team of researchers from the Universit脙漏 de Montr脙漏al and the Centre hospitalier de l'Universit脙漏 de Montr脙漏al (CHUM) have announced an important breakthrough in fighting the human immunodeficiency virus (HIV). For the first time, scientists have identified a defect in the immune response to HIV and found a way to correct the flaw. Dr. Rafick-Pierre S脙漏kaly, an eminent researcher in cell biology, immunology, and virology, has confirmed the identification of a new therapeutic target (the PD-1 protein) that restores the function of the T cells whose role is to eliminate cells infected with the virus. This constitutes a major breakthrough, opening new prospects for the development of therapeutic strategies for controlling HIV infection. The research findings appear in today's issue of the journal Nature Medicine.

Dr. S脙漏kaly explained that "immune system cells made non-functional by HIV can be identified by the presence of a protein that is significantly overexpressed when infected by the virus." In fact, high levels of the protein are associated with a more serious dysfunction. "The most important discovery made in this study arises from the fact that by stimulating this protein, we succeeded in preventing the virus from making immune system cells dysfunctional," he added.

The findings were simultaneously reproduced by two other laboratories " the labs headed by Dr. Bruce Walker at Harvard and Dr. Richard Koup at the NIH. "It's a rare occurrence for three teams to work together on attacking a major problem. Up until now, the virus has been more or less invincible. By combining our efforts, we found the missing link that may enable us to defeat the virus," noted Dr. S脙漏kaly. Discussions with partners are also underway to translate these research findings into clinical trials, which could start during the coming year.

Thanks to the joint efforts of the Universit脙漏 de Montr脙漏al, the CHUM Research Centre, G脙漏nome Qu脙漏bec, Genome Canada, the Canadian Institutes of Health Research (CIHR), the Canada Foundation for Innovation, the NIH, and the Fonds de la recherche en sant脙漏 du Qu脙漏bec (FRSQ), Quebec continues to show great leadership in the life sciences.

Paul L'Archev脙陋que and Martin Godbout, the presidents of G脙漏nome Qu脙漏bec and Genome Canada respectively, saluted the vision of the research team and the importance for Quebec and Canada of continuing to invest in genomics research. "The $14 million invested in this project certainly played a role in accelerating the researchers' work, and in helping Montreal to remain competitive on the international scene," noted the agency heads, adding that Dr. S脙漏kaly's team was the first in the world to present the findings of this major study.

"The results of Dr. Sekaly's study represent an important step in the development of a new therapeutic approach in the fight against HIV," said Dr. Alan Bernstein, CIHR President. "This study is a compelling example of the excellence of Canadian health researchers and of Canada's contribution to the world's response to the HIV-AIDS pandemic."

"This important discovery is a powerful example of what can be achieved through partnership," added Dr. Eliot Phillipson, President and CEO of the Canada Foundation for Innovation. "Canada is proud to have researchers of Dr. S脙漏kaly's calibre keeping our country at the forefront of the global fight against HIV-AIDS."

Dr. Mark Wainberg, Co-Director of the FRSQ-AIDS and infectious diseases Network and Co-Chair of the 16th World AIDS Conference held in Toronto last week, congratulated Dr. S脙漏kaly and his team: "This scientific breakthrough is a giant step in the fight against AIDS. It is particularly interesting to see that some of the best research teams are working together to stop this terrible curse."