First-time-in-human (FTIH) Study of GSK3145095 Alone and in Combination With Other Anticancer Agents in Adults With Advanced Solid Tumors

Subjects must provide signed, written informed consent.

Male and female subjects, age \>=18 years (at the time consent is obtained). a) Male subjects are eligible to participate if they agree to the following during the study treatment period and for at least 15 days (Part 1) and 120 days (Parts 2-4) after the last dose of study treatment: Refrain from donating sperm, be abstinent from heterosexual or homosexual intercourse as their preferred and usual lifestyle (abstinent on a long term and persistent basis) and agree to remain abstinent or must agree to use contraception/barrier: male condom and female partner to use an additional highly effective contraceptive method with a failure rate of \<1 percent per year. b) female subjects are eligible to participate if they are not either pregnant or breastfeeding, and at least one of the following conditions applies: is not a woman of childbearing potential (WOCBP), is a WOCBP and using a contraceptive method that is highly effective (with a failure rate of \<1 percent per year), with low user dependency during the study treatment period and for at least 15 days (Part 1) and 120 days (Parts 2-4) after the last dose of study treatment and agrees not to donate eggs (ova, oocytes) for the purpose of reproduction during this period. The investigator should evaluate the effectiveness of the contraceptive method in relationship to the first dose of study treatment. Hormonal contraception may be susceptible to interaction with the study drug, which may reduce the efficacy of the contraceptive method. Therefore, a barrier method is also required for subjects using a hormonal option (including hormonal intrauterine device \[IUD\], oral contraceptive pills/ patch/ vaginal inserts, and hormonal implants) and both highly effective methods of contraception should be utilized during the treatment period and for at least 15 days (Part 1) and 120 days (Parts 2-4) after the last dose of study treatment.If a highly effective non-hormonal method is used, then only one method of contraception is required (by a female participant or partner of a male participant; in either situation the male partner must still use a male condom in addition) during the treatment period and for at least 15 days (Part 1) and 120 days (Parts 2-4) after the last dose of study treatment. A WOCBP must have a negative highly sensitive pregnancy test (urine or serum) as required by local regulations) within 24 hours before the first dose of study intervention. If a urine test cannot be confirmed as negative (e.g., an ambiguous result), a serum pregnancy test is required. In such cases, the subject must be excluded from participation if the serum pregnancy result is positive. If the subject hasn't been on an acceptable method of contraception for at least 2 weeks prior to start of therapy, pregnancy testing must be done weekly for the first month of treatment. Additional requirements for pregnancy testing during and after study treatment. The investigator is responsible for review of medical history, menstrual history, and recent sexual activity to decrease the risk for inclusion of a woman with an early undetected pregnancy.

Histological documentation of locally advanced, recurrent or PDAC (Part 1), non-small cell lung cancer (NSCLC), triple negative breast cancer (TNBC), or melanoma (Part 2) that has progressed after standard therapy appropriate for the specific tumor type, or for which standard therapy has proven to be ineffective, intolerable, or is considered inappropriate. Subjects should have received at least one, but not more than 2 prior lines of therapy for advanced disease including both standards of care and investigational therapies. Subjects whose cancers harbor molecular alterations for which targeted therapy is standard of care should have received health authority-approved appropriate targeted therapy for their tumor types before enrollment.

All subjects in Parts 1 and 2 must consent to provide a fresh biopsy during screening of a primary tumor lesion or from other metastases (e.g. liver, lung, etc.), and a second biopsy after approximately 5 weeks of treatment.

Measurable disease per RECIST version 1.1. Palpable lesions that are not measurable by radiologic or photographic evaluations may not be utilized as the only measurable lesion. Subjects are encouraged to provide a pre-Baseline scan (within 24 weeks before the Baseline scan) to support exploratory investigation of tumor growth kinetics.

Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0 to 1.

Life expectancy of at least 12 weeks.

Adequate organ function.

QT duration corrected for heart rate by Fridericia's formula (QTcF) \<450 milliseconds (or QTcF \<480 milliseconds for subjects with bundle branch block).

What this study is about