Multicenter, open-label, dose-escalation, safety, tolerability, PK and pharmacodynamic study with a dose expansion at the RP2D to evaluate safety and potential antitumor activity of Q901 as a monotherapy and in combination with pembrolizumab

Inclusion Criteria:

• Participants with histologically or cytologically confirmed advanced or metastatic ovarian, CRPC, HR+ HER2- breast, endometrial, colorectal, small-cell lung, or pancreatic cancer, who have progressed following standard-of-care therapy or for whom there is no standard therapy that confers clinical benefit
• Measurable disease per RECIST v 1.1
• ECOG performance status 0,1 or 2
• Life expectancy of at least 3 months
• Age ≥ 18 years
• Signed, written IRB-approved informed consent form

Exclusion Criteria:

• New York Heart Association Class III or IV cardiac disease, or myocardial infarction, severe unstable angina, coronary/peripheral artery bypass graft, congestive heart failure within the past 6 months
• Have a corrected QT interval (using Fridericia's correction formula) (QTcF) of >470 msec (females) and >450 msec (males)
• Active, uncontrolled bacterial, viral, or fungal infections, requiring systemic therapy
• Active, poorly controlled autoimmune or inflammatory diseases