Trilaciclib is a first-in-class myelopreservation therapy designed to preserve hematopoietic stem and progenitor cell function, as well as immune system function, during chemotherapy. Trilaciclib is a short-acting intravenous CDK4/6 inhibitor administered prior to chemotherapy and has the potential to significantly improve treatment outcomes.

Trilaciclib is being evaluated in four randomized Phase 2 clinical trials. In March 2018, the company announced positive Phase 2 topline data showing myelopreservation benefits in newly diagnosed, treatment-naive small cell lung cancer (SCLC) patients (NCT02499770). There are three additional ongoing trilaciclib trials: a trial in previously treated SCLC patients (NCT02514447), a trial in triple-negative breast cancer (NCT02978716), and a trial in combination with Tecentriq® and chemotherapy in SCLC patients (NCT03041311).

Data from a Phase 1 trial in healthy volunteers were presented at the American Society of Clinical Oncology 2015 Annual Meeting and published in Science Translational Medicine. Trilacicilib has been extensively studied in animals; these preclinical data have been presented at several scientific meetings and published in Molecular Cancer Therapeutics, Science Translational Medicine and Cancer Discovery.