Modular Study to Evaluate CT7001 Alone in Cancer Patients With Advanced Malignancies

Module 1 comprises two sequential parts: * Part A: First-in-human (FiH) dose escalation investigating the safety and tolerability of CT7001 to identify the minimum biologically active dose (MBAD) and maximum tolerated dose (MTD). Part A also includes a cohort expansion for breast cancer participants only: this includes sequential tumour biopsies for evaluation of pharmacokinetic (PK), pharmacodynamic (PD) and tumour responses. The module is completed. * Part B: To refine the safety, tolerability, and PK and PD profiles of CT7001 monotherapy in participants with advanced solid malignancies from up to four tumour- specific cohorts, which may include, but is not limited to, triple-negative breast cancer, ovarian cancer, small-cell lung cancer and prostate cancer. * Part B, Cohort 1, Triple-Negative Breast Cancer (M1B-1 TNBC) treated with CT7001 as monotherapy. The module is completed. * Part B, Cohort 2, Prostate Cancer (M1B-2 CRPC) treated with CT7001 as monotherapy. The module is completed. * Module 2 is a Phase Ib/II, 3-part safety and efficacy study in participants with hormone- receptor positive (HR+ve) and human epidermal growth factor-2 negative (HER2-ve) breast cancer. This module includes dosing CT7001 in combination with fulvestrant. Module 2 was planned to comprise of 3 parts; Part A (open-label, single-arm, ascending dose study), Part B (double blinded, randomised, placebo-controlled study) and Part C (crossover from Part B). However, only Module 2 Part A was initiated and completed. Therefore, further sections of this record only reflect Module 2 Part A information. * Module 4 is a study investigating the effect of food on the PK of CT7001 monotherapy in participants with advanced solid malignancies. The module is completed. * Module 6 was planned as a Phase 1 study to explore the tolerability of, and the total and peak exposure of, an enteric capsule formulation of CT7001 \[CT7001(EC)\], when given as monotherapy to patients with advanced solid malignancies. Module 6 was not initiated.