Research in the Andreassen Laboratory at Cincinnati Children’s Hospital Medical Center focuses on DNA damage response mechanisms, including cell cycle checkpoint signaling and DNA repair by homologous recombination (HR), that maintain genome stability and thereby prevent tumorigenesis. The regulation and function of Fanconi anemia (FA) and breast cancer susceptibility (BRCA) genes/proteins is of particular interest, along with identifying FA-BRCA interacting proteins and understanding how FA-BRCA genes/proteins are affected by sequence variants. Additional related interests include applying insights into FA-BRCA genes/proteins to improve therapeutic approaches to cancer and related diseases, proton radiation biology, and how to ameliorate CRISPR-Cas9 mediated gene editing by enhancing HR-dependent repair of DSBs generated by Cas9.