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Guy Trudel, MD
613-737-8899 ext. 75591

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Space travel depletes red blood cells and bone, but bone marrow fat may come to the rescue
August 21, 2023 - A study of 14 astronauts suggests that while space travel depletes red blood cells and bone, the body can eventually replenish them back on Earth with the help of fat stored in the bone marrow.
Space travel alters gene expression in white blood cells, weakening the immune system
June 22, 2023 - The expression of (mostly protein-coding) genes in white blood cells changes rapidly when astronauts reach the International Space Station
International team investigates cause of space anemia
March 16, 2023 - Dr. Guy Trudel is leading a collaborative research project to uncover key mechanisms of spaceflight-related anemia.
Being in space destroys more red blood cells
January 14, 2022 - A world-first study has revealed how space travel can cause lower red blood cell counts, known as space anemia. Analysis of 14 astronauts showed their bodies destroyed 54 percent more red blood cells in space than they normally would on Earth, ...
Ottawa Hospital Research Institute and Faculty of Medicine support three translational research projects through Blueprint Excelerator
March 10, 2021 - The Ottawa Hospital Research Institute (OHRI) and the Faculty of Medicine are providing up to $150,000 in in-kind support to help translate three laboratory research projects into clinical applications. The three projects will receive support ...
More time in space linked with anemia
February 19, 2020 - More astronauts are anemic after longer space flights, according to a study led by Dr. Guy Trudel. Anemia is a reduced level of red blood cells that can make people feel weak or tired.
Canadian astronaut takes part in made-in-Ottawa study of bone marrow health in space
March 4, 2019 - Canadian Space Agency astronaut Dr. David Saint-Jacques is taking part in a made-in-Ottawa experiment on bone marrow health during his six-month mission on the International Space Station.
Dr. Guy Trudel, lead investigator for a Canadian study on bone marrow, teams up with astronauts on the ISS to uncover the implications of deep space exploration
April 11, 2018 - The fifth batch of research equipment for Dr. Guy Trudel’s MARROW study is headed for the stars on April 2. It will be among vital supplies and new experiments being delivered to the International Space Station (ISS) on board the SpaceX Dragon.
World-first study shows running can keep the bone marrow young
March 19, 2018 - Drs. Guy Trudel and Adnan Sheikh helped lead a world-first study that found running can keep the bone marrow young. At birth most of the bone marrow produces blood cells, but as a person ages it turns into fatty tissue. This negatively affects bloo
Research in flight: Photos show astronaut participant in Ottawa MARROW study
October 6, 2016 - Photo: NASA NASA Astronaut Jeff Williams conducts a breath sample collection for the Canadian experiment MARROW on board the International Space Station. MARROW studies how a lack of physical activity affects the bone marrow production of norm
Out-of-this-world research could help rehabilitation patients in Ottawa
May 13, 2016 - Entrepreneur Raymond Nicholas spent three months in a hospital bed and another three learning how to walk again. His doctor Dr. Guy Trudel is studying astronauts’ health in space, which he hopes will lead to faster rehabilitation for patients like Ni
Research in flight: Video shows astronaut participant in Ottawa MARROW study
March 18, 2016 - A new video from the Canadian Space Agency (CSA) features European Space Agency Astronaut Tim Peake explaining the MARROW study aboard the International Space Station. The video gives a unique glance into research led by Dr. Guy Trudel, a ...
Ottawa rehabilitation researchers find simulated space travel increases bone marrow fat
November 12, 2009 - As a specialist at The Ottawa Hospital Rehabilitation Centre, Dr. Guy Trudel has always been interested in improving how patients recover from long term injuries and immobility, so when an opportunity arose to study a similar problem in the ...