Study of Paclitaxel in Combination With BOS172722 in Patients With Advanced Nonhaematologic Malignancies

Boston Scientific

Status and phase: Completed; Phase 1

Conditions: Advanced Nonhaematologic Malignancies

Treatments: Drug: BOS172722; Drug: Paclitaxel

Study type: Interventional

Funder types: Industry

Identifiers

NCT03328494

BOS172722-01

2017-001749-29 (EudraCT Number)

Details and patient eligibility

About

This study will be conducted to assess the safety and tolerability of BOS172722 when administered as monotherapy and in combination with paclitaxel in participants with advanced nonhaematologic malignancies and also to establish the maximum tolerated dose and recommended Phase 2 dose of BOS172722 in combination with paclitaxel in those participants.

Enrollment: 38 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

Participants are eligible to be included in the study only if all of the following criteria apply:

• For Part A only, histopathologically confirmed diagnosis of an advanced nonhaematologic malignancy

• For Part B only, histopathologically confirmed diagnosis of triple-negative breast cancer

• No standard curative treatment or has declined standard therapy

• Eastern Cooperative Oncology Group performance status 0 or 1, measured within 72 hours before the first BOS172722 or paclitaxel dose

• Predicted life expectancy of ≥ 3 months

• Adequate renal function (creatinine ≤ 1.5 × upper limit of normal [ULN] or glomerular filtration rate ≥ 50 milliliters per minute [mL/min])

• Adequate hepatic function:

  • Total bilirubin ≤ 1.5 × ULN
  • Aspartate transaminase ≤ 3 × ULN (or ≤ 5 × ULN if due to liver involvement by tumor)
  • Alanine transaminase ≤ 3 × ULN (or ≤ 5 × ULN if due to liver involvement by tumor)

• Adequate bone marrow function:

  • Hemoglobin ≥ 9.0 grams per deciliter (g/dL)
  • Platelet count ≥ 100 × 10^9 cells per liter (cells/L)
  • Absolute neutrophil count ≥ 1.5 × 10^9 cells/L

• Mean corrected QT interval as calculated by the Fridericia correction formula < 470 milliseconds

• Willingness to use adequate contraceptive methods

• Capable of giving signed informed consent

• Willingness to avoid direct sunlight and the use of tanning equipment during the study and for at least 30 days after the last BOS172722 dose

Exclusion criteria

Participants are excluded from the study if any of the following criteria apply:

• For Part A combination cohorts and Part B: a history of hypersensitivity to paclitaxel
• Persistent clinically significant toxicity from prior chemotherapy > Grade 1, excluding alopecia
• Unable to swallow oral capsules
• Gastrointestinal (GI) condition which could interfere significantly with the absorption of study medication
• History of upper GI bleeding, ulceration, or perforation within 6 months before the first or paclitaxel BOS172722 dose
• Uncontrolled or severe concurrent medical condition (including uncontrolled brain metastases). (Stable brain metastases either treated or being treated with a stable dose of steroids/anticonvulsants, with no dose change within 28 days before the first BOS172722 or paclitaxel dose, will be allowed.)
• History of stroke or cerebrovascular accident within 3 months before the first BOS172722 or paclitaxel dose
• Any evidence of serious active infection
• Uncontrolled or severe cardiovascular disease, including myocardial infarct or unstable angina within 6 months before the first BOS172722 or paclitaxel dose, New York Heart Association Class II or greater congestive heart failure, serious arrhythmias requiring medication for treatment, clinically significant pericardial disease, or cardiac amyloidosis
• Uncontrolled intercurrent illness or psychiatric illness/social situations that would limit compliance with study requirements
• Known infection with Human Immunodeficiency Virus or hepatitis A, B, or C (testing not required)
• Major surgery within 28 days before the first BOS172722 or paclitaxel dose
• Pregnant or breastfeeding
• Active treatment for a secondary malignancy
• Cancer-directed therapy (chemo-, radio-, immuno-, biologic, or hormonal therapy with the exception of luteinizing hormone-releasing hormone agonists/antagonists, receptor activator of nuclear factor kappa-B ligand inhibitors, and bisphosphonates) within 21 days or 5 half-lives, whichever is longer, before the first BOS172722 or paclitaxel dose (Palliative radiotherapy is allowed before initiating study treatment if any associated toxicity resolved to ≤ Grade 1.)
• Use of a medication known to be a strong or moderate inhibitor or inducer of CYP3A4 within 14 days before the first BOS172722 or paclitaxel dose
• Use of a medication known to be a substrate of CYP3A4 and to have a narrow therapeutic range within 14 days before the first BOS172722 or paclitaxel dose
• Consumption of grapefruit or Seville oranges (including juice, marmalade, etc.) within 14 days before the first BOS172722 or paclitaxel dose

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Sequential Assignment

Masking: None (Open label)

---

38 participants in 3 patient groups

Part A: Monotherapy (BOS172722)

Experimental group

Description:

BOS172722 will be administered on Days 1, 2, 8, 9, 15, and 16 of each 28-day cycles in participants with histopathologically confirmed advanced nonhaematologic malignancies.

Treatment:

Drug: BOS172722

Part A: Combination therapy (BOS172722 + Paclitaxel)

Experimental group

Description:

BOS172722 will be administered on Cycle 0 Day 1 and on Days 1, 2, 8, 9, 15, and 16 in Cycle 1 and subsequent 28-day cycles in participants with histopathologically confirmed advanced nonhaematologic malignancies. The participants will also receive 80 milligrams per meters squared (mg/m\^2) paclitaxel as an intravenous (IV) infusion on Days 1, 8, and 15 of each 28-day cycle. During dose escalation, further exploration of the treatment schedule for the BOS172722-paclitaxel combination will be initiated. In such combination cohorts, BOS172722 will be administered with paclitaxel on Days 1, 8, and 15 only of each treatment cycle (except for Cycle 2 Day1), and will not be administered on Day 2, 9, and 16. These alternative schedules will be explored to further characterize the pharmacokinetics and tolerability of such a dosing regimen.

Treatment:

Drug: BOS172722

Drug: Paclitaxel

Part B: Combination therapy (BOS172722 + Paclitaxel)

Experimental group

Description:

Participants with triple-negative breast cancer will be treated with oral BOS172722 at the recommended Phase 2 dose (RP2D) established in Part A on Days 1, 2, 8, 9, 15, and 16 of each 28-day cycle and IV paclitaxel at 80 mg/m\^2 on Days 1, 8, and 15 of each 28-day cycle.

Treatment:

Drug: BOS172722

Drug: Paclitaxel