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A Study of Oral MBQ-167 in Participants With Advanced Breast Cancer

A Phase 1 Open-Label, First-in-Human Trial of Oral MBQ-167 as Single Agent in Participants With Advanced Breast Cancer

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06075810
Enrollment
48
Registered
2023-10-10
Start date
2023-11-09
Completion date
2026-12-31
Last updated
2026-08-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breast Cancer, Breast Cancer Stage IV, Breast Neoplasm

Keywords

Advanced Breast Cancer, Metastatic Breast Cancer, Recurrent Breast Cancer

Brief summary

A Phase 1, open-label, dose-escalation clinical trial of MBQ-167 in participants with advanced Breast Cancer for whom Standard of Care (SOC) has failed or has proven intolerable.

Detailed description

The main questions this clinical trial aims to answer are: * What, if any, are the side effects of different dose levels in humans? * What is the maximum tolerated dose? * How does the human body process the drug? * Does the drug slow, stop or eliminate cancer in human participants? Participants will be asked to: * provide informed consent * be evaluated by physicians and provide laboratory specimens to determine if eligible * take MBQ-167 orally twice a day for at least 21 days * may continue dosing, if safe to do so, until not effective or other decision to stop is made * participate in multiple visits that include additional evaluations, laboratory tests and diary review until after stopping the investigational drug

Interventions

DRUGMBQ-167

MBQ-167, an inhibitor of Rho GTPases Rac and Cdc42

Sponsors

MBQ Pharma
Lead SponsorINDUSTRY
Congressionally Directed Medical Research Programs
CollaboratorFED

Study design

Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Open-label dose escalation following a standard 3+3 cohort design with a 21 day Dose Limiting Toxicity (DLT) evaluation

Eligibility

Sex/Gender
ALL
Age
21 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: * The investigator will evaluate these and other criteria to determine whether a participant can be included in this study. * Histologically and/or cytologically confirmed advanced breast cancer which has progressed after treatment with approved therapies or for which there are no standard therapies available. * Participants with known brain metastases may be eligible if specific conditions are met. * Life expectancy ≥6 months, in the opinion of the investigator, after starting MBQ-167. * Are able to swallow capsules twice daily with a meal. Key

Exclusion criteria

* The investigator will evaluate these and other criteria to determine whether a participant should be excluded from this study. * Inability to take oral medication, or malabsorption syndrome or any other uncontrolled gastrointestinal condition (e.g., nausea, diarrhea, or vomiting) that might impair the bioavailability of MBQ-167. * Females who are pregnant or breastfeeding. * Participants who have received any anticancer treatment within 4 weeks or any investigational agent within 28 days prior to the first dose of trial drug or who have not recovered from any acute toxicity greater than Grade 0 or 1 related to previous anticancer treatment. * Participants who have received any anticancer treatment within 4 weeks or any investigational agent within 28 days prior to the first dose of trial drug or who have not recovered from any acute toxicity greater than Grade 0 or 1 related to previous anticancer treatment. * Active malignancies other than advanced breast cancer will be excluded from the study.

Design outcomes

Primary

MeasureTime frameDescription
Maximum Tolerated Dose (MTD)21 daysTo find the maximum tolerated dose (MTD) of MBQ-167 as a single agent administered orally, BID continuously for 21 days in participants with Advanced Breast Cancer (ABC) by evaluating for the presence or absence of dose-limiting toxicity (DLT) related to MBQ-167 administered in cohorts of participants at escalating sequential cohort dose levels.

Secondary

MeasureTime frameDescription
MBQ-167 PK parameter (Cmax/min)56 daysMaximum and minimum observed plasma concentration at steady state
MBQ-167 PK parameter (tmax)56 daysTime to maximum plasma concentration
MBQ-167 PK parameter (t1/2)56 daysTerminal elimination half-life
MBQ-167 PK parameter (AUC (0-t,0-24,∞))56 daysArea under the concentration-time curve over the dosing interval time from time 0
MBQ-167 PD parameter (differential gene expression)16 daysObserved quantitative measurement of gene expression change from baseline
MBQ-167 PK/PD parameter (minimum dose for therapeutic response)56 daysCorrelate differential gene expression change, objective response and PK parameter Cmax/min to identify a minimum dose for therapeutic response

Countries

Puerto Rico, United States

Contacts

CONTACTScott Houston
scott.houston@mbqpharma.com(415) 404 8838
CONTACTJose Rodriguez-Orengo, PhD
jose.rodriguez@mbqpharma.com
STUDY_DIRECTORNeil Sankar, MD

CMO, MBQ Pharma

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 1, 2026