Sub-study of Belantamab Mafodotin (GSK2857916) in Combination With Feladilimab (GSK3359609) in Participants With RRMM

Phase 2Active Not RecruitingNCT07217119

GlaxoSmithKline25 enrolled

Overview

The primary purpose is to determine the safety and tolerability of belantamab mafodotin in combination with feladilimab (GSK3359609), and to establish the recommended Phase 2 dose (RP2D) for the combination treatment to explore in the cohort expansion (CE) phase in participants with RRMM. This study is a sub study of the Master protocol (NCT04126200).

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Multiple Myeloma

Interventions

Belantamab mafodotinDRUG

Belantamab mafodotin will be administered.

FeladilimabDRUG

Feladilimab will be administered.

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Participant must be 18 years of age inclusive or older, at the time of signing the informed consent. * Participants must have histologically or cytologically confirmed diagnosis of Multiple Myeloma (MM), as defined by the IMWG. * Participants having at least 3 prior lines of prior anti-myeloma treatments including an immunomodulating agent (IMID) a proteasome inhibitor (PI) and an anti-CD38 monoclonal antibody. * Participants with a history of autologous stem cell transplant are eligible for study participation when, transplant was \>100 days prior to study enrolment and with no active infection(s). * Participants with Eastern Cooperative Oncology Group (ECOG) performance status of 0-1, unless ECOG less than equal to (\<=)2 is due solely to skeletal complications and/or skeletal pain due to MM. * Participants with measurable disease defined as at least one of the following: Serum M-protein greater than equal to (\>=)0.5 gram per deciliter (\>=5 gram per liter) or Urine M-protein \>=200 milligrams (mg) per 24 hours or Serum free light chain (FLC) assay: Involved FLC level \>=10 mg per deciliter (\>=100 mg per Liter) and an abnormal serum FLC ratio (\<0.26 or \>1.65). * Participants who have tested positive for Hepatitis B core antibody (HBcAb) can be enrolled if the following criteria are met: Serology result HBcAb+, Hepatitis B surface antigen (HBsAg)-; HBV deoxyribonucleic acid (DNA) undetectable during screening. * Participants who are currently receiving physiological doses oral steroids (\<10 mg/day), inhaled steroids or ophthalmalogical steroids. Exclusion Criteria: * Participants with current corneal epithelial disease except mild punctate keratopathy. * Participants with evidence of cardiovascular risk. * Participants with known immediate or delayed hypersensitivity reaction or idiosyncrasy to drugs chemically related to belantamab mafodotin or any of the components of the study treatment. History of severe hypersensitivity to other mAb. * Participants with active infection requiring antibiotic, antiviral, or antifungal treatment. * Participants with other monoclonal antibodies within 30 days or systemic anti-myeloma therapy within \<14 days. * Participants with prior radiotherapy within 2 weeks of start of study therapy. * Participants with prior allogeneic transplant are prohibited. * Participants who have received prior Chimeric Antigen T cell therapy (CAR-T) therapy with lymphodepletion with chemotherapy within 3 months of screening. * Participants with any major surgery (other than bone-stabilizing surgery) within the last 30 days. * Participants with prior treatment with an investigational agent within 14 days or 5 half-lives of receiving the first dose of study drugs, whichever is shorter. * Participants with \>=grade 3 toxicity considered related to prior check-point inhibitors and that led to treatment discontinuation. * Participants who have received transfusion of blood products within 2 weeks before the first dose of study drug. * Participants must not receive live attenuated vaccines within 30 days prior to first dose of study treatment or whilst receiving belantamab mafodotin +- partner agent in any sub-study arm of the platform trial and for at least 70 days following last study treatment. * Participants with presence of active renal condition (infection, requirement for dialysis or any other condition that could affect participant's safety). Participants with isolated proteinuria resulting from MM. * Participants with known human immunodeficiency virus (HIV) infection, unless the participant can meet all criteria: a) established anti-retroviral therapy for at least 4 weeks and HIV viral load\<400 copies/milliliter (mL) b) cluster of differentiation 4 plus (CD4+) T-cell (CD4+) counts \>= 350 cells/microliter (µL) c) No history of Acquired immunodeficiency syndrome (AIDS)-defining opportunistic infections within the last 12 months in which case the participant would be eligible for CE Phase only. For participants receiving nirogacestat, HIV drugs that are strong Cytochrome P450 3A4 (CYP3A4) inhibitors are prohibited. HIV drugs that are moderate CYP3A4 inhibitors, while permitted, should be co-administered with caution and must be accompanied by nirogacestat dose modifications. * Participants with autoimmune disease (current or history) or syndrome that required systemic treatment within the past 2 years. * Recent (within the past 6 months) history of symptomatic pericarditis.

Locations (11)

GSK Investigational Site

Atlanta, Georgia, United States

GSK Investigational Site

Madison, Wisconsin, United States

GSK Investigational Site

Fitzroy, Victoria, Australia

Outcomes

Primary Outcomes

Dose Exploration (DE) Phase: Number of participants with dose limiting toxicities (DLTs)

Time frame: Up to 21 days

DE Phase: Number of participants with adverse events (AEs)

Time frame: Up to approximately 281 weeks

DE Phase: Number of participants with clinically significant changes in hematology, clinical chemistry, and urinalysis lab parameters

Time frame: Up to approximately 281 weeks

Cohort Expansion (CE) Phase: Overall Response Rate (ORR)

ORR is defined as the percentage of participants with a confirmed Partial response (PR) or better as the best overall response (BOR), according to the International Myeloma Working Group (IMWG) Response Criteria.

Time frame: Up to approximately 281 weeks

Secondary Outcomes

DE Phase: Overall Response Rate

ORR is defined as the percentage of participants with confirmed PR or better as BOR, according to the IMWG Response Criteria.

Time frame: Up to approximately 380 weeks

CE Phase: Clinical Benefit Rate (CBR)

CBR is defined as the percentage of participants with a confirmed minimal response (MR) or better as BOR, according to IMWG response criteria.

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants achieving Partial Response (PR)

Number of participants with PR according to IMWG criteria will be analysed.

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants achieving PR

Data from ClinicalTrials.gov

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GSK Investigational Site

Melbourne, Victoria, Australia

GSK Investigational Site

Vancouver, British Columbia, Canada

GSK Investigational Site

Toronto, Ontario, Canada

GSK Investigational Site

Villejuif, France

GSK Investigational Site

Hamburg, Germany

GSK Investigational Site

Utrecht, Netherlands

GSK Investigational Site

Pamplona Navarra, Spain

...and 1 more locations

Number of participants with PR according to IMWG criteria will be analysed.

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants achieving Very Good Partial Response (VGPR)

Number of participants with VGPR according to IMWG criteria will be analysed.

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants achieving VGPR

Number of participants with VGPR according to IMWG criteria will be analysed.

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants achieving Complete Response (CR)

Participants with CR according to IMWG criteria will be analysed.

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants achieving CR

Participants with CR according to IMWG criteria will be analysed.

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants achieving Stringent Complete Response (sCR)

Participants with sCR according to IMWG criteria will be analysed.

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants achieving sCR

Participants with sCR according to IMWG criteria will be analysed.

Time frame: Up to approximately 380 weeks

DE Phase: Belantamab mafodotin concentrations when administered in combination with anti-cancer treatments

Time frame: Up to approximately 380 weeks

CE Phase: Belantamab mafodotin concentrations when administered in combination with anti-cancer treatments

Time frame: Up to approximately 380 weeks

DE Phase: Feladilimab concentration when administered in combination with belantamab mafodotin

Time frame: Up to approximately 380 weeks

CE Phase: Feladilimab concentration when administered in combination with belantamab mafodotin

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants with anti-drug antibodies (ADAs) against belantamab mafodotin

Time frame: Up to approximately 380 weeks

DE Phase: Titre of (ADAs) against belantamab mafodotin

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants with anti-drug antibodies (ADAs) against feladilimab

Time frame: Up to approximately 380 weeks

DE Phase: Titre of (ADAs) against feladilimab

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with ADAs against belantamab mafodotin

Time frame: Up to approximately 380 weeks

CE Phase: Titre of ADAs against belantamab mafodotin

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with ADAs against feladilimab

Time frame: Up to approximately 380 weeks

CE Phase: Titre of ADAs against feladilimab

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants with adverse events of special interest (AESI) for belantamab mafodotin

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with AESI for belantamab mafodotin

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants with AESI for feladilimab

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with AESI for feladilimab

Time frame: Up to approximately 380 weeks

DE Phase: Number of participants with abnormal ocular findings on ophthalmic examination

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with abnormal ocular findings on ophthalmic examination

Time frame: Up to approximately 380 weeks

CE Phase: Progression-free survival (PFS)

PFS is defined as the time from randomization until the earliest date of confirmed progressive disease (PD) per IMWG, or death due to any cause.

Time frame: Up to approximately 380 weeks

CE Phase: Duration of response (DoR)

DoR is defined as the time from first documented evidence of confirmed PR or better until progressive disease per IMWG or death due to progressive disease among participants who achieve confirmed partial response or better.

Time frame: Up to approximately 380 weeks

CE Phase: Time to response (TTR)

TTR is defined as the time between the date of randomization and the first documented evidence of response (confirmed PR or better), among participants who achieve a response (confirmed PR or better).

Time frame: Up to approximately 380 weeks

CE Phase: Overall survival (OS)

OS is defined as the time from randomization until death due to any cause.

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with AEs and SAEs

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with AEs leading to discontinuation

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with AE leading to dose reduction or delay

Time frame: Up to approximately 380 weeks

CE Phase: Number of participants with clinically significant changes in hematology, clinical chemistry and urinalysis lab parameters

Time frame: Up to approximately 380 weeks