Study Of ATRN-119 In Patients With Advanced Solid Tumors

Inclusion Criteria: * DNA damage response (DDR) mutations documented in the past medical record or confirmed during the screening period. * Measurable disease defined by RECIST 1.1. * Life expectancy ≥ 3 months. * Subject must be capable of oral administration of study medication. Exclusion Criteria: * Patient has had a cytotoxic chemotherapy, immunotherapy, radiotherapy or other targeted therapies within 4 weeks. * Surgical procedure performed within 7 days prior to first scheduled dose of ATRN-119. * Concomitant treatment with strong inhibitors or inducers of CYP3A4 and CYP2D6. * Known human immunodeficiency virus infection (HIV). * Subjects with active viral or bacterial infections and/or receiving systemic antibiotics or anti-viral medications. * Current or past diagnosis of leukemia within the past 5 years. * Prior radiotherapy at the target lesion unless there is evidence of disease progression. * Known CNS metastases or clinical evidence of CNS involvement that is not stable for previous 1 month by radiology documentation (magnetic resonance imaging \[MRI\] brain). * History of non-malignant gastronintestinal (GI) bleeding, gastric stress ulcerations, or peptic ulcer disease within the past 3-months. * Patient has uncontrolled hypertension at time of enrollment. * Complete left bundle branch block (LBBB), bifascicular block (right bundle branch block \[RBBB\] with either left anterior hemiblock or left posterior hemiblock). * Any clinically significant ST segment and/or T-wave abnormalities. * Myocardial infarction or unstable angina pectoris within 6 months prior to starting study medication.