Timothy J. Ley, MD
|Institutions||Washington University School of Medicine|
Timothy J. Ley is an American hematologist and cancer biologist. He is the Lewis T. and Rosalind B. Apple Professor of Oncology in the department of medicine, and is chief of the section of stem cell biology in the division of oncology at Washington University in St. Louis. He is a member of the Alvin J. Siteman Cancer Center.
Ley's research group focuses on the genetics and genomics of acute myeloid leukemia (AML). His lab studies the development of normal and leukemic blood cells. His work is focused on identifying the mutations and epigenetic events that are responsible for the initiation and progression of AML.
Ley led the team that sequenced the first cancer genome (of an AML patient).He has gone on to develop projects that will use whole genome sequencing to help diagnose and treat patients with AML.
To better understand the role of many of the mutations discovered through whole genome sequencing of leukemias, he and his colleagues have constructed several mouse models of AML, which are very similar to human AML.Dr. Ley's laboratory has also helped to define the roles of granzymes for the functions of cytotoxic and regulatory T cells.
Ley grew up in Lakota, Iowa. He received his B.A. degree from Drake University in 1974, and his M.D. from Washington University School of Medicine in 1978. He did his internship and residency in Medicine at Massachusetts General Hospital, was a clinical associate at the NHLBI (National Heart, Lung, and Blood Institute), a Hematology-Oncology Fellow at Washington University Medical Center, and a senior investigator at the NHLBI before moving to Washington University in 1986.
In 2015, Ley was appointed to the National Cancer Advisory Boardby President Obama. Ley was the recipient of the Leopold Griffuel Prize for Basic Science in 2022.
Leukemia is a group of blood cancers that usually begin in the bone marrow and result in high numbers of abnormal blood cells. These blood cells are not fully developed and are called blasts or leukemia cells. Symptoms may include bleeding and bruising, bone pain, fatigue, fever, and an increased risk of infections. These symptoms occur due to a lack of normal blood cells. Diagnosis is typically made by blood tests or bone marrow biopsy.
Tumors of the hematopoietic and lymphoid tissues or tumours of the haematopoietic and lymphoid tissues are tumors that affect the blood, bone marrow, lymph, and lymphatic system. Because these tissues are all intimately connected through both the circulatory system and the immune system, a disease affecting one will often affect the others as well, making aplasia, myeloproliferation and lymphoproliferation closely related and often overlapping problems. While uncommon in solid tumors, chromosomal translocations are a common cause of these diseases. This commonly leads to a different approach in diagnosis and treatment of hematological malignancies. Hematological malignancies are malignant neoplasms ("cancer"), and they are generally treated by specialists in hematology and/or oncology. In some centers "hematology/oncology" is a single subspecialty of internal medicine while in others they are considered separate divisions. Not all hematological disorders are malignant ("cancerous"); these other blood conditions may also be managed by a hematologist.
Acute myeloid leukemia (AML) is a cancer of the myeloid line of blood cells, characterized by the rapid growth of abnormal cells that build up in the bone marrow and blood and interfere with normal blood cell production. Symptoms may include feeling tired, shortness of breath, easy bruising and bleeding, and increased risk of infection. Occasionally, spread may occur to the brain, skin, or gums. As an acute leukemia, AML progresses rapidly, and is typically fatal within weeks or months if left untreated.
The Cancer Genome Project is part of the cancer, aging, and somatic mutation research based at the Wellcome Trust Sanger Institute in the United Kingdom. It aims to identify sequence variants/mutations critical in the development of human cancers. Like The Cancer Genome Atlas project within the United States, the Cancer Genome Project represents an effort in the War on Cancer to improve cancer diagnosis, treatment, and prevention through a better understanding of the molecular basis of the disease. The Cancer Genome Project was launched by Michael Stratton in 2000, and Peter Campbell is now the group leader of the project. The project works to combine knowledge of the human genome sequence with high throughput mutation detection techniques.
Acute myeloblastic leukemia with maturation (M2) is a subtype of acute myeloid leukemia (AML).
Cluster of differentiation antigen 135 (CD135) also known as fms like tyrosine kinase 3, receptor-type tyrosine-protein kinase FLT3, or fetal liver kinase-2 (Flk2) is a protein that in humans is encoded by the FLT3 gene. FLT3 is a cytokine receptor which belongs to the receptor tyrosine kinase class III. CD135 is the receptor for the cytokine Flt3 ligand (FLT3L).
Runt-related transcription factor 1 (RUNX1) also known as acute myeloid leukemia 1 protein (AML1) or core-binding factor subunit alpha-2 (CBFA2) is a protein that in humans is encoded by the RUNX1 gene.
MN1 is a gene found on human chromosome 22, with gene map locus 22q12.3-qter. Its official full name is meningioma 1 because it is disrupted by a balanced translocation (4;22) in a meningioma.
CCAAT/enhancer-binding protein alpha is a protein encoded by the CEBPA gene in humans. CCAAT/enhancer-binding protein alpha is a transcription factor involved in the differentiation of certain blood cells. For details on the CCAAT structural motif in gene enhancers and on CCAAT/Enhancer Binding Proteins see the specific page.
Allen Charles Edward Eaves is the 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. In 2016 he was awarded the Order of British Columbia as well as named Ernst and Young's Entrepreneur Of The Year™ Pacific.
Cancer genome sequencing is the whole genome sequencing of a single, homogeneous or heterogeneous group of cancer cells. It is a biochemical laboratory method for the characterization and identification of the DNA or RNA sequences of cancer cell(s).
Elaine R. Mardis is the co-executive director of the Institute for Genomic Medicine at Nationwide Children's Hospital, where she also serves as the Nationwide Foundation Endowed Chair in Genomic Medicine. She also is professor of pediatrics at the Ohio State University College of Medicine. Mardis’s research focuses on the genomic characterization of cancer and its implications for cancer medicine. She was part of the team that reported the first next-generation-based sequencing of a whole cancer genome, and participated extensively in The Cancer Genome Atlas (TCGA) and the Pediatric Cancer Genome Project (PCGP).
George Quentin Daley is the Dean of the Faculty of Medicine, Caroline Shields Walker Professor of Medicine, and Professor of Biological Chemistry and Molecular Pharmacology at Harvard Medical School. He was formerly the Robert A. Stranahan Professor of Pediatrics at Harvard Medical School, Director of the Stem Cell Transplantation Program at Boston Children's Hospital, and an investigator of the Howard Hughes Medical Institute, Associate Director of Children's Stem Cell Program, a member of the Executive Committee of the Harvard Stem Cell Institute. He is a past president of the International Society for Stem Cell Research (2007–2008).
The Alvin J. Siteman Cancer Center at Barnes-Jewish Hospital and Washington University School of Medicine is a cancer treatment, research and education institution with six locations in the St. Louis area. Siteman is the only cancer center in Missouri and within 240 miles of St. Louis to be designated a Comprehensive Cancer Center by the National Cancer Institute (NCI). Siteman is also the only area member of the National Comprehensive Cancer Network, a nonprofit alliance of 32 cancer centers dedicated to improving the quality and effectiveness of cancer care.
Christine J. Harrison is a Professor of Childhood Cancer Cytogenetics at Newcastle University. She works on acute leukemia and used cytogenetics to optimise treatment protocols.
James R. Downing is an American clinical executive. He is the president and chief executive officer of St. Jude Children's Research Hospital.
Scott Allen Armstrong is an American pediatric oncologist and cancer biologist focused on chromatin-based control of gene expression in cancer and therapeutic discovery. Armstrong and his team were the first to isolate rare leukemia stem cells in a mouse model of leukemia.
Brunangelo Falini is an Italian hematologist, academic and researcher. He is a Full Professor of Hematology, and Head of the Institute of Hematology and Bone Marrow Transplantation at University of Perugia.
Christopher Hourigan is a physician-scientist known for work on measurable residual disease in acute myeloid leukemia.
Bob Löwenberg is a clinical hematologist/investigator. He is Professor of Hematology at Erasmus University Rotterdam.