James D. Griffin, MD
Professor of Medicine, Harvard Medical School
Office phone: 617-632-3360
Preferred contact method: office phone
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Area of ResearchMechanisms of Transformation in Leukemia
Dana-Farber Cancer Institute
450 Brookline Avenue
Boston, MA 02215
BiographyDr. Griffin received his MD from Harvard Medical School in 1974. After residency training in internal medicine at Johns Hopkins Hospital, he completed a hematology fellowship at Massachusetts General Hospital and a medical oncology fellowship at DFCI. In 1981, he joined the staff of DFCI, where he is now director of the Leukemia Program and chair of the Department of Medical Oncology. He also serves on the scientific advisory boards of the Lombardi Cancer Center at Georgetown University and the Johns Hopkins Cancer Center.
- Johns Hopkins University Society of Scholars, 2003
- Dr. Anthony Cortese Award, 2001
ResearchMechanisms of Transformation in Leukemia
There are several major projects in our laboratory. The first involves trying to understand how tyrosine kinase oncogenes cause certain types of chronic leukemia. The prototypic tyrosine kinase oncogene, BCR-ABL, causes human chronic myeloid leukemia and rapidly transforms hematopoietic cells in mice. BCR-ABL encodes an activated tyrosine kinase that is localized to the cytoplasm and cytoskeleton. In addition, mutations of the tyrosine kinase oncogene FLT3 have been detected in about 30% of patients with acute myelogenous leukemia and a small number of patients with acute lvmphocytic leukemia or myelodysplastic syndrome. Recently, mutations in the JAK2 tyrosine kinase oncogene have been shown to cause polycythemia vera and some other myeloproliferative diseases.
Each of these mutations results in constitutive activation of the kinase and unregulated signals causing growth, blocking differentiation, and enhancing viability. We are interested in defining the signaling pathways leading to these biological effects, since many of these pathways constitute potential targets for drug development. Over the last few years, we have participated in the development of novel small-molecule inhibitors for BCR-ABL (AMN107) and FLT3 (PKC412), both of which are currently in clinical trials; we are also working actively to develop inhibitors of JAK2.
The second major project is in signal transduction of Notch receptors. Notch is a highly conserved signaling pathway that regulates development of many tissues, and in hematopoiesis Notch is likely to play a role in the differentiation of T cells and B cells. We have cloned new components in the Notch signaling pathway, and a number of studies are ongoing with regard to these new nuclear proteins. One member of this family of proteins, called MAML2, has now been shown to be involved in a recurrent chromosomal translocation, t(11;19), in most cases of mucoepidermoid cancer, and appears to cause that disease.
Our laboratory also is involved in projects related to the development of novel therapies for hematologic malignancies, involving immunotherapy, gene therapy, and chemotherapy.
- Sattler, Martin, PhD
- Weisberg, Ellen, PhD
- Wu, Lizi, PhD
- Scheijen, Blanca, PhD
- Jiang, Jingrui, PhD
- Nakamura, Makoto, MD
- Ray, Arghya, PhD
- Chen, Jihua, PhD
- Chen, Jie Jenny, Ph.D.