Thrombocytopenia is the dose-limiting toxicity of many anti-cancer and anti-HIV drugs. A standardized and optimized murine CFU-Meg assay can be used to determine the toxicity of experimental chemotherapeutic drugs to megakaryocyte progenitor cells. The CFU-Meg assay was designed to produce statistically significant, reproducible myelotoxicity data. The experiments proposed in this Phase II application will validate the use of the CFU-Meg assay for such testing. This will involve in vivo/in vitro correlations comparing toxicity in CFU-Meg assays with platelet and megakaryocyte numbers in chemotherapy-treated mice. The toxicity of chemotherapeutic agents will be further tested in CFU-Meg assays using primitive multipotential progenitors populations to identify the mechanism of early versus late onset thrombocytopenia. Purified human proteins at plasma concentrations will be added to protein-free CFU-Meg assays to understand the toxic effects of drugs under physiological conditions. Finally, human clinical data will be compared with the in vitro data to determine if the CFU-Meg assays predict the human in vivo toxicity. Such assays may be used to screen experimental and conventional drugs for potential toxicity to megakaryocyte progenitors.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Small Business Innovation Research Grants (SBIR) - Phase II (R44)
Project #
2R44AI032835-02A1
Application #
2067720
Study Section
Hematology Subcommittee 2 (HEM)
Project Start
1992-08-15
Project End
1996-04-30
Budget Start
1994-05-01
Budget End
1995-04-30
Support Year
2
Fiscal Year
1994
Total Cost
Indirect Cost
Name
Hipple Cancer Research Corporation
Department
Type
DUNS #
City
Dayton
State
OH
Country
United States
Zip Code
45439