Strategic considerations

This is a multicenter, open-label study in participants with triple negative breast cancer (TNBC) to study the safety, tolerability, pharmacokinetics and preliminary efficacy of SC-005. This study consists of 2 parts: Part A (dose regimen finding) followed by Part B (dose expansion).

Inclusion Criteria:

• Histologically or cytologically confirmed advanced TNBC that is relapsed, refractory, or progressive and not eligible for another standard therapy that would confer clinical benefit to the subject.

  • Advanced disease is defined as metastatic disease or locally advanced disease that is not amenable to surgery or radiotherapy with curative intent
  • TNBC is defined as:

• <1% staining by immunohistochemistry (IHC) for estrogen (ER) and progesterone (PR) receptors, 0 or 1+ IHC for human epidermal growth factor receptor 2 (HER2), OR

• Negative for HER2 amplification by in situ hybridization (ISH) for 2+ IHC disease.

• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.

• Adequate hematologic, hepatic, and renal function.

Exclusion Criteria:

• Any significant medical condition including any suggested by Screening laboratory findings that, in the opinion of the Investigator or Sponsor, may place the subject at undue risk from the study.
• Has ECG abnormalities that make QT interval corrected (QTc) evaluation difficult (e.g., severe morphologic abnormalities).
• Prior exposure to a pyrrolobenzodiazepine or indolino-benzodiazepine based drug, or known hypersensitivity or contraindication to SC-005 or excipient contained in the drug formulation.