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Baylor College of Medicine

6621 Fannin
Houston, TX 77030
United States

High Risk neuroblastoma is the most common abdominal tumor in children and accounts for 15% of all pediatric cancer mortality. This is despite arduous intensive toxic chemotherapy treatments with major long-term side effects. Most deaths result from relapsed neuroblastoma, which grows back after initially responding to therapy. Thus, our major goal is to develop novel treatments to prevent neuroblastoma relapse. This will have a major impact on survival for neuroblastoma (currently less than 40% ).

Delay in blood cell count recovery after chemotherapy is the most commonly observed toxicity in pediatric acute myeloid leukemia (AML), and 80% of patients develop severe toxicities during treatment. Delay in therapy due to a low white blood cell (WBC) count places individuals at risk for severe infections, and is associated with an increased mortality. We are investigating genetic markers for risk for AML treatment-related toxicities, such as unexpectedly prolonged periods of low WBC count after chemotherapy.

Cancer is caused by the accumulation of errors (mutations) in the genetic material of tumor cells. The identification of these mutations has allowed the development of treatments specifically targeted at the mutated genes, resulting in remarkable clinical advances for a few types of cancer. These discoveries remain the exception rather than the rule, however, since only a minority of genes has been analyzed in most cancers.

Fatigue is now recognized as the most frequent symptom experienced by children and adolescents with cancer. As we increase our understanding of fatigue in children and adolescents with cancer, it is important to explore new measurements of this symptom. Carnitine is found in nearly all cells of the body and plays a critical role in energy production. Carnitine deficiencies can cause symptoms such as fatigue, muscle pain and weakness in individuals with cancer. The purpose of this study is to explore carnitine as a physiologic marker for fatigue in 60 children and adolescents with cancer.

The first goal of cancer genetics research is to understand why children develop cancer and to identify if specific families or children have an even higher risk of developing cancer. This information impacts the child’s cancer care and determines who else in the family may need increased cancer surveillance to try and detect cancer at its earliest stage. Many cancer susceptibility genes also play a major role in cancer in the general population. Thus, the larger goal of cancer genetics research is to improve our understanding of cancer cells and to identify new targets for treatment.

Nabil AhmedI received a grant from Alex’s Lemonade Stand Foundation in 2006, when I had promising data that immune cells could be used against pediatric bone cancers. Thanks to the ALSF funding, we were able to continue to work on this project and the results have been very gratifying.

Background


Neuroblastoma is an aggressive pediatric cancer that accounts for more than 15% of all pediatric cancer deaths. Currently we treat advanced disease with high dose chemotherapy, radiation therapy and surgery and despite these toxic therapies, cure rates remain less than 40% in children over one year of age. Our laboratory focuses on developing novel biologically specific therapies for neuroblastoma with the hope that these will be more effective and less toxic.

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