Valerie Castle, M.D.
Ravitz Professor and Chair, Department of Pediatric and Communicable Diseases Pediatrician-in-Chief
Director of the Taubman Institute's Neuroblastoma Research Program
Discovering Treatments for Childhood Cancers
When Valerie Castle began her career as a pediatrician in the early 1980s, the survival rate for acute lymphoblastic leukemia had gone from near zero in the 1930s and 1940s to almost 50 percent. Today, survival rates exceed 85 percent. Great gains such as these in survival rates for children with cancer have occurred because of the persevering work of physician-scientists like Castle who have teamed together — at C.S. Mott Children’s Hospital and in networks with researchers around the world — to treat children collaboratively and with ever-increasing and far-reaching effectiveness.
Castle’s research focuses exclusively on the pediatric solid tumor, neuroblastoma. She is specifically interested in mechanisms of chemotherapy and radiation resistance as well as studies on the control of neuroblastoma invasion and metastases. Her latest studies have been in the area of chromosomal rearrangements, a hallmark of cancers including neuroblastoma. These can be caused by incorrect DNA repair. Castle’s laboratory has recently discovered that the levels of proteins involved in the repair of damaged DNA are abnormally high in neuroblastoma tumors, and these levels correlated with a shorter duration of patient survival, suggesting that defective DNA repair resulting in chromosomal abnormalities may contribute to the poor outcome or even the development of this disease.
Using the facilities of the Taubman Institute’s Consortium for Stem Cell Therapies, Castle is now developing a neural crest stem cell model of this neuroblastoma. She is testing the hypothesis that overly active DNA repair during development of the neural crest stem cell into a nerve cell is a fundamental step in the development of neuroblastoma tumors. After differentiating an established human embryonic stem cell line into a neural crest stem cell, her investigators will express the DNA repair factors they believe are critical in the development of this tumor. These genetically modified lines will then be analyzed for their similarities and differences to human neuroblastoma cancer cell lines that have been established in the Castle laboratory. This groundbreaking work has the potential to uncover the underlying mechanisms in the development of this devastating cancer in children.
- Progress Report, May 2010 (PDF, 150KB)
- HDAC6 Deacetylates Ku70 and Regulates Ku70-Bax Binding in Neuroblastoma (PDF, 1.7MB)
11 Taubman Scholars named to "Best Doctors in America" list
They're among 493 U-M physicians to receive the honor from their peers
Click here for the list.
Renowned diabetes expert to speak at U-M
David M. Nathan, M.D., of Harvard University to deliver two lectures April 18
Click here for details
U-M offers new early detection prostate cancer test
Research by Taubman Scholar Dr. Arul Chinnaiyan has let to the development of a new test for prostate cancer that is far more accurate than the standard PSA test, the University of Michigan has announced.
Click here to read more.
news & events
New Taubman Prize trophy debuts
The new trophy for the Taubman Prize for Excellence in Translational Medical Research, which was designed in consultation with institute founder Mr. A. Alfred Taubman, was presented at the institute's Oct. 11 symposium. The modern sculpture was created using a novel 3D printing technique.
Drug cuts risk of bone-marrow transplant side effect
Taubman Emerging Scholar Sung Won Choi, M.D., is the lead author of a new study that finds a new way to help prevent graft-vs-host disease in cancer patients receiving bone-marrow transplants.
Study: Two types of cancer stem cells lead to metastasis
Breast cancer stem cells exist in two different states and each state plays a role in how cancer spreads, according to a new study published by Taubman Senior Scholar Dr. Max Wicha.