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Dana-Farber Cancer Institute

44 Binney Street
Boston, MA 2115
United States

Background

Background

Neuroblastoma is an embryonal tumor responsible for 15% of pediatric cancer deaths. Survival rate for high-risk neuroblastoma, which affects the majority of patients, is still dismal despite the use of aggressive therapy. Relapse occurs in over half of patients, with no current prospect for a cure. Therefore, understanding the cause of relapse is critical for enabling the development of effective treatments.

Background

Background

Neuroblastoma (NB) is the leading cause of cancer-related death in children. Despite intensive treatment regimens approximately 50-60% of patients with high-risk neuroblastoma will eventually relapse, emphasizing the need for novel treatment approaches.

Background

Background

Emerging evidence suggests that many cancers experience episodes of very rapid mutation. One example is a newly discovered mutagenic event called chromothripsis, in which one of the 46 DNA molecules (chromosomes) in the cell is heavily damaged, causing some segments of the chromosome to become scrambled, while others are lost altogether. Chromothripsis has been described in many cancers, but is particularly common in some pediatric cancers including sarcomas and gliomas.

p53 is a renowned tumor suppressor gene that is frequently mutated or deleted in cancer, resulting in the development, persistence, and chemoresistance of human cancers. In surveying the broad spectrum of cancers for genetic modification of p53, we have identified a series of pediatric leukemias that maintain expression of wild-type p53 despite the attendant risks to tumor cell survival. We hypothesized that mechanisms other than p53 mutation and deletion could be operational to neutralize p53 activity in these contexts, including negative regulation of p53 by HDM2 and/or HDMX.

Background

Radiation and chemotherapy is the standard for most patients with cancer. The goal is to kill as many of the tumor cells as possible before resistance develops and the tumor stops responding. Our recent work has discovered that the release of the cellular content (cellular debris) of dead tumor cells into the tumor microenvironment provides the necessary factors that stimulate surviving tumor cells to grow.

Dr. Wang has moved and will be continuing his research at City of Hope's Beckman Research Institute in Duarte, CA. http://www.leowanglab.org/

Background

Acute myeloid leukemia (AML) is difficult to treat, relapses easily, and is often fatal. This is largely due to the existence of rare leukemia stem cells (LSCs), which are able to propagate the disease but are resistant to chemotherapy. Developing therapies that specifically target LSCs will improve AML cure rates dramatically.

Background

Neuroblastoma is the most common solid tumor of childhood, which accounts for 15% of childhood cancer deaths. Changes in the nucleolus and ribosome biogenesis are known to occur in malignant cells, which is due to the key role of the ribosome in cell growth and proliferation. In my graduate work, I have shown that a nucleolar factor Def plays a role in ribosomal RNA processing during zebrafish development as a component of the SSU processome.

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