Safety and Tolerability Study of Mivebresib Tablet Alone or in Combination With Ruxolitinib Tablet or Navitoclax Tablet in Adult Participants With Myelofibrosis

Myelofibrosis (MF) Clinical Trial

Official title:

A Phase 1b Study of Mivebresib Alone or in Combination With Ruxolitinib or Navitoclax in Subjects With Myelofibrosis

Clinical Trial Details — Status: Terminated

Administrative data

• NCT number: NCT04480086
• Other study ID #: M20-248
• Secondary ID: 2020-001226-65
• Status: Terminated
• Phase: Phase 1
• Start date: March 17, 2021
• Est. completion date: July 28, 2023

Study information

• Verified date: August 2023
• Source: AbbVie
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Myelofibrosis (MF) is a bone marrow illness that affects blood-forming tissues in the body. MF disturbs the body's normal production of blood cells, causing extensive scarring in the bone marrow. This leads to severe anemia, weakness, fatigue, and an enlarged spleen. The purpose of this study is to see how safe and tolerable mivebresib is, when given alone, and in combination with navitoclax or ruxolitinib, for adult participants with MF.

Mivebresib is an investigational drug being developed for the treatment of MF. The study has 4 segments - A, B, C, and D. In Segment A, the safe dosing regimen of mivebresib is identified, and then given alone as monotherapy. In Segment B, C, and D, combination therapies of mivebresib with either ruxolitinib or navitoclax are given. Adult participants with a diagnosis of MF will be enrolled. Around 130 participants will be enrolled in 60 sites worldwide.

In Segment A, participants will receive different doses and schedules of oral mivebresib tablet to identify a safe dosing regimen. Additional participants will be enrolled at the identified monotherapy dosing regimen. In Segment B, participants will receive oral ruxolitinib and mivebresib will be given as "add-on" therapy. In Segment C, participants will receive mivebresib and oral navitoclax. In Segment D, participants will receive mivebresib and ruxolitinib. Participants will receive treatment until disease progression or the participants are not able to tolerate the study drugs.

There may be higher treatment burden for participants in this trial compared to their standard of care. Participants will attend regular visits during the study at a hospital or clinic. The effect of treatment will be checked by medical assessments, blood and bone marrow tests, checking for side effects, and completing questionnaires.

Recruitment information / eligibility

• Status: Terminated
• Enrollment: 1
• Est. completion date: July 28, 2023
• Est. primary completion date: July 28, 2023
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Laboratory values indicative of adequate bone marrow, renal, and hepatic function meeting protocol criteria

• Completion of the Myelofibrosis System Assessment Form (MFSAF) on at least 4 out of the 7 days prior to Day 1 with at least 2 symptoms with a score >=3 or a total score of >=10.

• Documented diagnosis of intermediate or high-risk primary myelofibrosis (PMF), post-polycythemia vera myelofibrosis (PPV-MF) or post-essential thrombocytopenia myelofibrosis (PET-MF) as defined by World Health Organization (WHO).

• Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1.

• Intermediate - 2, or High-Risk disease as defined by the Dynamic International Prognostic Scoring System (For Segment A only, Intermediate - 1 with palpable splenomegaly >=5 centimeters [cm] below costal margin are also eligible).

• Splenomegaly defined as spleen palpation measurement >= 5 centimeters (cm) below costal margin or spleen volume >= 450 cubic cms as assessed by Magnetic Resonance Imaging (MRI) or Computed Tomography (CT) scan (for Segments A and c, baseline spleen assessment must be obtained > 7 days after discontinuation of most recent Myelofibrosis (MF) therapy. If possible, this assessment should occur within 10 days of Cycle 1 Day 1).

Segment-Specific Prior Therapy Criteria:

• Segment A:

--Prior exposure to one or more Janus Kinase Inhibitors (JAKi), the most recent of which was discontinued > 28 days prior to Cycle 1 Day 1.

• Segment B:

• Currently receiving ruxolitinib; AND

• Willingness to reduce dose (if on a higher dose); and on a stable dose for 14 days or longer prior to Cycle 1 Day 1; AND

• At least one of the following criteria (a, b, or c):

1. >= 24 weeks duration of current ruxolitinib course, with evidence of disease that is resistant, refractory, or has lost response to ruxolitinib monotherapy;

2. < 24 weeks duration of current ruxolitinib course with documented disease progression as defined by any of the following:

• Appearance of new splenomegaly that is palpable to at least 5 centimeters (cm) below the left costal margin (LCM), in participants with no evidence of splenomegaly prior to the initiation of ruxolitinib.

• 100% increase in the palpable distance below the LCM, in participants with measurable spleen distance 5 - 10 cm prior to the initiation of ruxolitinib.

• 50% increase in the palpable distance below the LCM, in participants with measurable spleen > 10 cm prior to the initiation of ruxolitinib.

• A spleen volume increase >= 25% (as assessed by MRI or CT) in participants with a spleen volume assessment available prior to the initiation of ruxolitinib.

3. Prior treatment with ruxolitinib for >= 28 days complicated by any of the following:

• Development of red blood cell transfusion requirement (at least 2 units/month for 2 months).

• Grade >= 3 adverse events of neutropenia and/or anemia while on ruxolitinib treatment, with improvement or resolution upon dose reduction.

• Segment C:

• Prior exposure to one or more JAKi (the most recent of which was discontinued > 28 days prior to Cycle 1 Day 1), and are intolerant, resistant, refractory or lost response to teh JAKi.

Exclusion Criteria:

Segment-Specific Prior Therapy Criteria:

• Segment A:

--Prior exposure to one or more Bromodomain and Extra Terminal (BET) inhibitors.

• Segment B:

--Prior exposure to one or more BET inhibitors.

• Segment C:

--Prior exposure to one or more BET inhibitors and/or any B-Cell Lymphoma 2 (BCL2) and/or B-Cell Lymphoma XL (BCLXL) inhibitor, including navitoclax.

• Segment D:

• Prior exposure to JAKi and/or any BET inhibitor.

Related Conditions & MeSH terms

• Myelofibrosis (MF)
• Primary Myelofibrosis

Intervention

Drug:
• Mivebresib
Tablet: Oral
• Navitoclax
Tablet; Oral
• Ruxolitinib
Tablet; Oral

Locations

Country	Name	City	State
Korea, Republic of	Inje University Busan Paik Hospital /ID# 224043	Busan
South Africa	Wits Clinical Research , Wits Health Consortium (PTY) Ltd /ID# 222669	Johannesburg	Gauteng
South Africa	Alberts Cellular Therapy /ID# 222667	Pretoria	Gauteng
United States	UC Health - Cincinnati /ID# 224079	Cincinnati	Ohio
United States	University of Texas MD Anderson Cancer Center /ID# 221652	Houston	Texas
United States	Thompson Cancer Survival Ctr /ID# 225802	Knoxville	Tennessee
United States	Stony Brook University Hospital /ID# 222653	Stony Brook	New York

Sponsors (1)

Lead Sponsor	Collaborator
AbbVie

Countries where clinical trial is conducted

United States,  Korea, Republic of,  South Africa, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Percentage of Participants With Adverse Events	An adverse event (AE) is defined as any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product which does not necessarily have a causal relationship with the treatment. The investigator assesses the relationship of each event to the use of study drug.	Up To Approximately 1 year from start of study
Secondary	Percentage of Participants who Achieve Spleen Volume Reduction of 35% or Greater (SVR35)	Reduction in spleen volume is measured by magnetic resonance imaging (MRI).	Up To Week 24
Secondary	Maximum Observed Plasma Concentration (Cmax) of Mivebresib	Maximum observed plasma concentration (Cmax) of Mivebresib.	Up To Week 12
Secondary	Time to Cmax (Tmax) of Mivebresib	The amount of time taken to reach Cmax.	Up To Week 12
Secondary	Area Under Concentration vs Time Curve (AUC) of Mivebresib	AUC of Mivebresib will be calculated.	Up To Week 12
Secondary	Half-Life (t1/2) of Mivebresib	Half-life of Mivebresib will be calculated.	Up To Week 12
Secondary	Accumulation Ratio of Mivebresib	Pharmacokinetic parameters will include accumulation ratio of Mivebresib.	Up To Week 12
Secondary	Apparent Clearance (CL/F) of Mivebresib	CL/F of Mivebresib will be calculated.	Up To Week 12
Secondary	Apparent Volume of Distribution (Vd/F) of Mivebresib	Vd/F of mivebresib will be calculated.	Up To Week 12
Secondary	Percentage of Participants With >= 50% Reduction in Total Symptom Score (TSS)	TSS is assessed using the Myelofibrosis Symptom Assessment Form (MFSAF) v4.0. MFSAF v4.0 measures the burden of myelofibrosis-related symptoms. The symptoms are assessed on a 11-point numeric rating scale (NRS) anchored from 0 (absent) to 10 (worst imaginable).	Week 24
Secondary	Objective Response Rate (ORR)	ORR is defined as the sum of rates of complete remission (CR) and partial remission (PR).	Week 24
Secondary	Maximum Observed Plasma Concentration (Cmax) of Navitoclax	Maximum Observed Plasma Concentration (Cmax) Of Navitoclax.	Up To Week 12
Secondary	Time to Cmax (Tmax) of Navitoclax	The amount of time taken to reach Cmax.	Up To Week 12
Secondary	Area Under Concentration vs Time Curve (AUC) of Navitoclax	AUC of Navitoclax will be calculated.	Up To Week 12
Secondary	Maximum Observed Plasma Concentration (Cmax) of Ruxolitinib	Maximum Observed Plasma Concentration (Cmax) Of Ruxolitinib.	Up To Week 12
Secondary	Time to Cmax (Tmax) of Ruxolitinib	The amount of time taken to reach Cmax.	Up To Week 12
Secondary	Area Under Concentration vs Time Curve (AUC) of Ruxolitinib	AUC of Ruxolitinib will be calculated.	Up To Week 12