A Study of ART0380 for the Treatment of Advanced or Metastatic Solid Tumors

General Inclusion Criteria: * Signed informed consent * Discontinued all previous treatments for cancer for at least 21 days or 5 half-lives, whichever is shorter, and recovered from the acute effects of therapy to CTCAE Grade ≤1. Palliative radiotherapy must have completed 1 week prior to start of study treatment. * If patients have a known germline BRCA mutation or a cancer with a somatic BRCA mutations or which is HRD positive and for which there is an approved PARP inhibitor, participants should have received such treatment before participating in the study unless contra-indicated * At least 1 radiologically evaluable lesion (measurable and/or non-measurable) that can be assessed at baseline and is suitable for repeated radiological evaluation by RECIST v1.1 or Prostate Cancer Working Group-3 Guidelines (PCWG-3) * Acceptable hematologic, renal, hepatic, and coagulation functions independent of transfusions and granulocyte colony-stimulating factor * Non-irradiated tumor tissue sample (archival or newly obtained core biopsy of a tumor lesion) available for submission for analysis. * Female patients of childbearing potential and male patients with female partners of childbearing potential are required to use highly effective contraception plus one barrier method during their participation in the study and for 7 months and 5 months respectively following the last dose. For male and female patients given gemcitabine or irinotecan, highly effective contraception plus one barr…