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Working together, biologists James Till and Ernest McCulloch made contributions to stem cell research by demonstrating the existence of multipotent stem cells in 1961. They helped lay the foundation for modern stem cell biology and regenerative medicine through their work while studying the effects of radiation on the bone marrow of mice at the Ontario Cancer Institute in Toronto.
Till & McCulloch first published their findings of the discovery of stem cells in the journal Radiation Research . [1] [2] In later work, joined by graduate student Andy Becker, they cemented their stem cell theory and published the results in the journal Nature in 1963. [3]
Till & McCulloch then expanded their research activities and mentored other young scientists, some notable. Scientists that were under the direct supervision of Till or McCulloch were members of their research group, or were co-authors of papers, including the following:[ citation needed ]
Both Till & McCulloch continued their research.
Till's focus shifted increasingly towards the evaluation of cancer therapies and quality of life issues in the 1980s. He has positions in organizations including the Stem Cell Network, Project Open Source, Canadian Breast Cancer Foundation, and others. Among them, Till is:
McCulloch's later research had an emphasis on cellular and molecular mechanisms affecting the growth of malignant blast stem cells from the blood of patients with acute myeloblastic leukemia. McCulloch died on January 20, 2011, shortly before the 50th anniversary of the publication of the 1961 paper in Radiation Research.
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Together, James Till and Ernest McCulloch were:
Their scientific work has also earned them individual awards including:
In multicellular organisms, stem cells are undifferentiated or partially differentiated cells that can change into various types of cells and proliferate indefinitely to produce more of the same stem cell. They are the earliest type of cell in a cell lineage. They are found in both embryonic and adult organisms, but they have slightly different properties in each. They are usually distinguished from progenitor cells, which cannot divide indefinitely, and precursor or blast cells, which are usually committed to differentiating into one cell type.
The Temerty Faculty of Medicine is the medical school of the University of Toronto. Founded in 1843, the faculty is based in Downtown Toronto and is one of Canada's oldest institutions of medical studies, being known for the discovery of insulin, stem cells and the site of the first single and double lung transplants in the world.
Louis Siminovitch was a Canadian molecular biologist. He was a pioneer in human genetics, researcher into the genetic basis of muscular dystrophy and cystic fibrosis, and helped establish Ontario programs exploring genetic roots of cancer.
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James Edgar Till is a University of Toronto biophysicist, best known for demonstrating – in a partnership with Ernest McCulloch – the existence of stem cells.
Ernest Armstrong McCulloch was a University of Toronto cellular biologist, best known for demonstrating – in a partnership with James Till – the existence of stem cells.
Tak Wah Mak, is a Canadian medical researcher, geneticist, oncologist, and biochemist. He first became widely known for his discovery of the T-cell receptor in 1983 and pioneering work in the genetics of immunology. In 1995, Mak published a landmark paper on the discovery of the function of the immune checkpoint protein CTLA-4, thus opening the path for immunotherapy/checkpoint inhibitors as a means of cancer treatment. Mak is also the founder of Agios Pharmaceuticals, whose lead compound, IDHIFA®, was approved by the FDA for acute myeloid leukemia in August 2017, becoming the first drug specifically targeting cancer metabolism to be used for cancer treatment. He has worked in a variety of areas including biochemistry, immunology, and cancer genetics.
James Edwin Darnell Jr. is an American biologist who made significant contributions to RNA processing and cytokine signaling and is author of the cell biology textbook Molecular Cell Biology.
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Constance Jean Eaves CorrFRSE was a Canadian biologist with significant contributions to cancer and stem cell research. Eaves was a professor generics of genetics at the University of British Columbia and was also the co-founder with Allen C Eaves of Terry Fox Laboratory.
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Sean J. Morrison is a Canadian-American stem cell biologist and cancer researcher. Morrison is the director of Children's Medical Center Research Institute at UT Southwestern (CRI), a nonprofit research institute established in 2011 as a joint venture between Children’s Health System of Texas and UT Southwestern Medical Center. With Morrison as founding director, CRI was established to perform transformative biomedical research at the interface of stem cell biology, cancer and metabolism to better understand the biological basis of disease. He is a Howard Hughes Medical Institute Investigator, has served as president of the International Society for Stem Cell Research, and is a member of the U.S. National Academy of Medicine, U.S. National Academy of Sciences and European Molecular Biology Organization.
Allen Charles Edward Eaves is the co-founding Director of the Terry Fox Laboratory for Hematology/Oncology Research, which over a 25-year period (1981–2006) he grew into an internationally recognized centre for the study of leukemia and stem cell research. His own research on chronic myelogenous leukemia (CML) has led the way to a new understanding of the disease. As Head of Hematology at the British Columbia Cancer Agency and the University of British Columbia for 18 years (1985–2003) he engineered the building of one of the first and largest bone marrow transplant programs in Canada. In recognition of his research accomplishments and leadership in moving basic science discoveries in stem cell biology into the clinic, he was elected President of the International Society of Cellular Therapy (1995–1997), Treasurer of the Foundation for the Accreditation of Cellular Therapy (1995–2002) and President of the American Society of Blood and Marrow Transplantation (1999–2000). In 2003 he was awarded the prestigious R. M. Taylor Medal by the Canadian Cancer Society and the National Cancer Institute of Canada.
Richard Olding Hynes is a British biologist, a Howard Hughes Medical Institute Investigator, and the Daniel K. Ludwig Professor for Cancer Research at the Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology (MIT). His research focuses on cell adhesion and the interactions between cells and the extracellular matrix, with a particular interest in understanding molecular mechanisms of cancer metastasis. He is well known as a co-discoverer of fibronectin molecules, a discovery that has been listed by Thomson Scientific ScienceWatch as a Nobel Prize candidate.
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