An In Vitro Screening to Identify Drug-Resistant Mutations for Target-Directed Chemotherapeutic Agents
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The discovery of oncogenes and tumor suppressors as a driver of cancer development has triggered the development of target-specific small molecule anticancer compounds. As exemplified by Imatinib (Gleevec), a specific inhibitor of the Chronic Myeloid Leukemia-associated BCR/ABL kinase, these agents promise impressive activity in clinical trials, with low levels of clinical toxicity. However, such therapy is susceptible to the emergence of drug resistance mainly due to amino acid substitutions in the target protein. Defining the spectrum of such mutations is important for patient monitoring and the design of next-generation inhibitors. Using Imatinib and BCR/ABL as a paradigm for a drug–target pair, we reported a retroviral vector-based screening strategy to identify the spectrum of resistance-conferring mutations, which has helped in designing the next-generation BCR/ABL inhibitors such as Nilotinib, Dasatinib, and Ponatinib. Here we provide a detailed methodology for the screen, which can be generally applied to any drug–target pair.
Key wordsProtein kinase Small molecule inhibitors Tyrosine kinase inhibitors Acquired drug resistance Retroviral-screening
This work was supported by grants from V Foundation.
- 9.Druker BJ, Sawyers CL, Kantarjian H, Resta DJ, Reese SF, Ford JM, Capdeville R, Talpaz M (2001) Activity of a specific inhibitor of the BCR-ABL tyrosine kinase in the blast crisis of chronic myeloid leukemia and acute lymphoblastic leukemia with the Philadelphia chromosome. N Engl J Med 344:1038–42PubMedCrossRefGoogle Scholar
- 12.Shah NP, Nicoll JM, Nagar B, Gorre ME, Paquette RL, Kuriyan J, Sawyers CL (2002) Multiple BCR-ABL kinase domain mutations confer polyclonal resistance to the tyrosine kinase inhibitor imatinib (STI571) in chronic phase and blast crisis chronic myeloid leukemia. Cancer Cell 2:117–25PubMedCrossRefGoogle Scholar
- 13.Branford S, Rudzki Z, Walsh S, Grigg A, Arthur C, Taylor K, Herrmann R, Lynch KP, Hughes TP (2002) High frequency of point mutations clustered within the adenosine triphosphate-binding region of BCR/ABL in patients with chronic myeloid leukemia or Ph-positive acute lymphoblastic leukemia who develop imatinib (STI571) resistance. Blood 99:3472–5PubMedCrossRefGoogle Scholar
- 15.Azam M, Nardi V, Shakespeare WC, Metcalf CA 3rd, Bohacek RS, Wang Y, Sundaramoorthi R, Sliz P, Veach DR, Bornmann WG, Clarkson B, Dalgarno DC, Sawyer TK, Daley GQ (2006) Activity of dual SRC-ABL inhibitors highlights the role of BCR/ABL kinase dynamics in drug resistance. Proc Natl Acad Sci USA 103:9244–9PubMedCrossRefGoogle Scholar