麻豆约拍

Not a day goes by without a new story about the environment. Although we often consider the environment on a global scale, cells in our body also have to contend with environmental factors. New studies from a team of researchers from the Research Institute of the MUHC and 麻豆约拍 show that the environment surrounding breast cancer cells plays a crucial role in determining whether tumor cells grow and migrate or whether they fade away. Their study is the first to identify the genes behind this environmental control and correlate them with patient outcome. Their findings are published in this week鈥檚 issue of Nature Medicine.

鈥淎 tumour can not exist on its own. It has to be supported and nourished by the cell types around it, the microenvironment,鈥� says senior author Dr Morag Park, Director of the molecular oncology group at the Research institute if the MUHC. 鈥淲hen we began this study there was little known about the importance of this microenvironment on cancer initiation and progression. We now know that this environment is pivotal; different patients have distinct tumour microenvironments at a gene level. Our findings show that the gene profile of these distinct microenvironments can be used to determine clinical outcome 鈥� who will fare well and who will not.鈥�

Dr Park, a professor of oncology, biochemistry, and medicine at 麻豆约拍, and her team analyzed tissue from 53 breast cancer patients. They used a unique technique, laser capture microdissection (LCM), to separate tumour cells from microenvironment tissue. They compared the gene expression between the microenvironment tissue and controls using micro-array analysis. From thousands of genes they identified 163, which correlated with patient outcome. A good outcome was defined as having no tumour metastasis and tumour migration and non-responsiveness to therapy was considered poor outcome.

From the original 163 genes, the team further identified a panel of 26 specific genes that could be used to accurately predict clinical outcome. This 26 gene-profile, called the stromal derived prognostic predictor (SDPP), was used to predict outcome from a second set of beast cancer patients.

鈥淲e were able to show that the SDPP effectively predicts outcome in a second group of patients,鈥� says Dr Park, 鈥淭his panel accurately forecasted patient status, suggesting that this may be a promising diagnostic tool.

鈥淥ur next steps are to develop this 26-gene predictor into a functional test. We are currently working on this and we anticipate a product for clinical trials within a year,鈥� adds Park.

鈥淭his work takes tremendous dedication and collaboration from a number of people including pathologists, surgeons, oncologists as well as researchers. I would like to thank the outstanding work done by G. Finak from the laboratory of Dr M. Hallett of 麻豆约拍鈥檚 Computer Science Department, the breast surgeons of the MUHC, including Dr S. Meterissian, and by the Department of Pathology at 麻豆约拍, where Dr A. Omeroglu works."

This research was funded by from the Quebec Breast Cancer Foundation, Genome Canada-Genome Quebec, Quebec Valorisation-Recherche Quebec, Fonds de la Recherche en Sante du Quebec, Canadian Institutes for Health Research Team Grant, and the National Science and Engineering Research Council of Canada Discovery Grant.

The Research Institute of the 麻豆约拍 Health Centre (RI MUHC) is a world-renowned biomedical and health-care hospital research centre. Located in Montreal, Quebec, the institute is the research arm of the MUHC, the university health center affiliated with the Faculty of Medicine at 麻豆约拍 University. The institute supports over 600 researchers, nearly 1200 graduate and post-doctoral students and operates more than 300 laboratories devoted to a broad spectrum of fundamental and clinical research. The Research Institute operates at the forefront of knowledge, innovation and technology and is inextricably linked to the clinical programs of the MUHC, ensuring that patients benefit directly from the latest research-based knowledge.

The Research Institute of the MUHC is supported in part by the Fonds de la recherche en sant茅 du Qu茅bec.

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About 麻豆约拍
麻豆约拍 is Canada's leading research-intensive university and has earned an international reputation for scholarly achievement and scientific discovery. Founded in 1821, 麻豆约拍 has 21 faculties and professional schools, which offer more than 300 programs from the undergraduate to the doctoral level. 麻豆约拍 attracts renowned professors and researchers from around the world and top students from more than 150 countries, creating one of the most dynamic and diverse education environments in North America. There are approximately 23,000 undergraduate students and 7,000 graduate students. It is one of two Canadian members of the American Association of Universities. 麻豆约拍's two campuses are located in Montreal, Canada. www.mcgill.ca