To Evaluate Safety, Tolerability, and Clinical Activity of the Antibody-drug Conjugate, GSK2857916 Administered in Combination With Lenalidomide Plus Dexamethasone (Arm A), or in Combination With Bortezomib Plus Dexamethasone (Arm B) in Participants With Relapsed/Refractory Multiple Myeloma (RRMM)

Study Overview
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Brief Summary
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This study will evaluate the safety and tolerability profile of belantamab mafodotin when administered in combination with approved regimens of either Lenalidomide Plus Dexamethasone [Len/Dex (Arm A)] or Bortezomib Plus Dexamethasone [Bor/Dex (Arm B)] in participants with RRMM, i.e., those who have relapsed or who are refractory to at least 1 line of approved therapy. Part 1 of the study will be a dose escalation phase to evaluate the safety and tolerability of up to 3 dose levels and up to 2 dosing schedules of belantamab mafodotin in combination with the two standard of care (SoC) regimens. Part 2 will further evaluate the safety and preliminary clinical activity of belantamab mafodotin at selected dose levels and dosing schedules in combination with Len/Dex or Bor/Dex. A total of 152 evaluable participants will be enrolled in the study with up to 27 in Part 1 and up to 125 in Part 2. Participants receiving treatment Arm A, may continue combination treatment until the occurrence of progressive disease (PD), intolerable adverse events (AEs ), consent withdrawal, death or end of study. The participants receiving treatment Arm B, may continue combination treatment for a total of up to 8 cycles. After 8 cycles of combination therapy, the participants will continue treatment with belantamab mafodotin, as a monotherapy until the occurrence of PD, intolerable AEs, consent withdrawal, death or end of study.

Official Title
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A Phase I/II, Open-label, Dose Escalation and Expansion Study to Evaluate Safety, Tolerability, and Clinical Activity of the Antibody-Drug Conjugate GSK2857916 Administered in Combination With Lenalidomide Plus Dexamethasone (Arm A), or Bortezomib Plus Dexamethasone (Arm B) in Participants With Relapsed / Refractory Multiple Myeloma - DREAMM-6

Conditions
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Multiple Myeloma

Intervention / Treatment
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* Drug: Belantamab mafodotin
* Drug: Lenalidomide
* Drug: Dexamethasone
* Drug: Bortezomib


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Capable of giving signed informed consent. Male or female, 18 years or older (at the time consent is obtained). Have confirmed diagnosis of Multiple Myeloma (MM) as defined by the IMWG. Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 for Arm A and 0 to 2 for Arm B. Have undergone stem cell transplant (SCT), or are considered transplant ineligible. Have been previously treated with at least 1 prior line of MM therapy, and must have documented disease progression during or after their most recent therapy. Must have at least ONE aspect of measurable disease, defined as one the following: Urine M-protein excretion >=200 milligram (mg)/24 hours, or; Serum M-protein concentration >=0.5 gram (g)/deciliter (dL) (>=5.0 g/Liter), or; Serum free light chain (FLC) assay: involved FLC level >=10 mg/dL (>=100 mg/L) and an abnormal serum FLC ratio (<0.26 or >1.65). Participants with a history of autologous SCT, are eligible for study participation provided the following eligibility criteria are met: Autologous SCT was >100 days prior to study enrollment; No active bacterial, viral, or fungal infection(s) present; Participant meets the remainder of the eligibility criteria. All prior treatment-related toxicities (defined by National Cancer Institute Common Toxicity Criteria for Adverse Events [NCI-CTCAE], Version 4.03, 2010) must be Grade <= 1 at the time of enrollment, except for alopecia. Participants with Grade 2 neuropathy can be enrolled into Len/Dex treatment arm, but not into Bor/Dex treatment arm. Adequate organ system functions as defined by the laboratory assessments. The contraceptions used by female participants be consistent with local regulations, regarding methods of contraception for those participating in clinical studies. A female participant is eligible to participate if she is not pregnant or breastfeeding, and at least one of the following conditions applies: is not a woman of child bearing potential (WOCBP) or Is a WOCBP and using a contraceptive method that is highly effective (with a failure rate of <1% per year), preferably with low user dependency, during the intervention period and for at least 4 months after the last dose of belantamab mafodotin and agrees not to donate eggs (ova, oocytes) for the purpose of reproduction during this period. The investigator is responsible for review of medical history, menstrual history, and recent sexual activity to decrease the risk for inclusion of a woman with an early undetected pregnancy. WOCBP Participants Assigned to Arm A: Due to lenalidomide being a thalidomide analogue with risk for embryo-fetal toxicity and prescribed under a pregnancy prevention/controlled distribution program, WOCBP participants will be eligible if they commit either to abstain continuously from heterosexual sexual intercourse or to use two methods of reliable birth control (one method that is highly effective; beginning 4 weeks prior to initiating treatment with lenalidomide, during therapy, during dose interruptions and continuing for 4 weeks following discontinuation of lenalidomide treatment. Thereafter, WOCBP participants must use a contraceptive method that is highly effective (with a failure rate of <1% per year) for a further 3 months, and agree not to donate eggs (ova, oocytes) for the purpose of reproduction during this period: Two negative pregnancy tests must be obtained prior to initiating lenalidomide therapy. The first test should be performed within 10-14 days and the second test within 24 hours prior to prescribing lenalidomide therapy. WOCBP Participants Assigned to Arm B WOCBP assigned to Arm B must have a negative highly sensitive serum pregnancy test within 72 hours of dosing on C1D1 and agree to use effective contraception during the study and for 4 months after the last dose of belantamab mafodotin or 7 months from the last dose of bortezomib, whichever is longer. Male participants using contraception should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies. Male participants are eligible to participate if they agree to the following: Arm A: from the time of first dose of study until 6 months after the last dose of belantamab mafodotin 4 weeks after the last dose of lenalidomide, whichever is longer, to allow for clearance of any altered sperm. Arm B: from the time of first dose of study until 6 months after the last dose of belantamab mafodotin or 4 months from the last dose of bortezomib (whichever is the longer) to allow for clearance of any altered sperm. Male participants must agree to refrain from donating sperm and either be abstinent from heterosexual intercourse as their preferred and usual lifestyle (abstinent on a long term and persistent basis) and agree to remain abstinent OR Must agree to use contraception/barrier as detailed below. Agree to use a male condom even if they have undergone a successful vasectomy and female partner to use an additional highly effective contraceptive method with a failure rate of <1% per year when having sexual intercourse. Male participants should also use a condom with pregnant females. If the female partner of the male participant is pregnant at the time of enrollment, or becomes pregnant during the trial, the male participant must agree to remain abstinent (if it is consistent with their preferred and usual lifestyle) or use a male condom. Exclusion Criteria: Systemic anti-myeloma therapy (including systemic steroids) within <=14 days, or plasmapheresis within 7 days prior to the first dose of study drug. Use of an investigational drug within 14 days or five half-lives (whichever is longer) preceding the first dose of study drug. Prior treatment with a monoclonal antibody within 30 days of receiving the first dose of study drugs. Prior allogenic stem cell transplant. Note: Participants who have undergone syngeneic transplant will be allowed only if they have no history and no currently active, graft versus host disease (GvHD). Evidence of active mucosal or internal bleeding. Any major surgery within the last four weeks. 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 are eligible, provided they fulfill criteria. Any serious and/or unstable pre-existing medical, psychiatric disorder or other conditions (including lab abnormalities) that could interfere with participant's safety, obtaining informed consent or compliance to the study procedures. Current active liver or biliary disease (with the exception of Gilbert's syndrome or asymptomatic gallstones, or otherwise stable chronic liver disease per investigator's assessment). Participants with invasive malignancies other than multiple myeloma are excluded, unless the second malignancy has been considered medically stable for at least 2 years. The participant must not be receiving active therapy, other than hormonal therapy for this disease. Note: Participants with curatively treated non-melanoma skin cancer are allowed without a 2-year restriction. Evidence of cardiovascular risk including any of the following: Evidence of current clinically significant uncontrolled arrhythmias, including clinically significant ECG abnormalities including 2nd degree (Type II) or 3rd degree atrioventricular (AV) block; History of myocardial infarction, acute coronary syndromes (including unstable angina), coronary angioplasty, or stenting or bypass grafting within 3 months of Screening; Class III or IV heart failure as defined by the New York Heart Association functional classification system; Uncontrolled hypertension. Known immediate or delayed hypersensitivity reaction or idiosyncratic reaction to drugs chemically related to belantamab mafodotin, or any of the components of the study treatment. Pregnant or lactating female. Active infection requiring treatment. Known Human immunodeficiency virus (HIV) infection. Presence of hepatitis B surface antigen (HBsAg), or hepatitis B core antibody (HBcAb at Screening or within 3 months prior to first dose of study treatment). Current corneal disease except for mild punctuate keratopathy. Positive hepatitis C antibody test result or positive hepatitis C Ribonucleic acid (RNA) test result at Screening or within 3 months prior to first dose of study treatment. Current corneal disease except for mild punctute keratopathy. Participants Assigned to Treatment A (belantamab mafodotin plus Len/Dex): Participants unable to tolerate antithrombotic prophylaxis must be excluded; Discontinuation of prior treatment with lenalidomide due to intolerable AEs. Participants Assigned to Treatment B (belantamab mafodotin plus Bor/Dex): Unacceptable AEs from previous bortezomib treatment; Ongoing Grade 2 or higher peripheral neuropathy or neuropathic pain from previous bortezomib treatment; Intolerance or contraindications to anti-viral prophylaxis.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Sequential Assignment
Interventional Model Description: This is a 2-part study. Part 1 of the study will be a dose escalation phase to evaluate the safety and tolerability of up to 3 dose levels and up to 2 dosing schedules of belantamab mafodotin in combination with two SoC regimens (Arm A - belantamab mafodotin with Len/Dex and Arm B - belantamab mafodotin with Bor/Dex) For Arm A (belantamab mafodotin with Len/Dex), Part 2 of the study will further evaluate the safety and preliminary clinical activity of up to 2 dose levels and up to 3 dosing schedules of belantamab mafodotin with Len/Dex . For Arm B (belantamab mafodotin with Bor/Dex), Part 2 of the study will further evaluate the safety and preliminary clinical activity of up to 3 dose levels and up to 4 dosing schedules of belantamab mafodotin with Bor/Dex.
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Arm A: Belantamab mafodotin+lenalidomide +dexamethasone<br>Participants will receive SINGLE full dose of belantamab mafodotin as 2.5 mg/kg and 1.9 mg/kg on Day 1 of every 28-day cycle as a 30-60 min infusion. SPLIT: belantamab mafodotin will be administered in two equal divided doses, 2.5 mg/kg SPLIT dose of a 1.25 mg/kg dose on Day 1 and a 1.25 mg/kg dose on Day 8 of each 28-day cycle. STRETCH: belantamab mafodotin will be administered as 1.9 mg/kg dose on Day 1 of every alternate 28-day cycles (C1, C3, C5, C7 and so on.) Participants will also receive Lenalidomide 25 mg or 10 mg orally daily, on Days 1-21 of each 28 day cycle with Dexamethasone, 40 mg weekly per oral (PO)/intravenously (IV) on Days 1,8,15, & 22 of each cycle. | Drug: Belantamab mafodotin<br>* Selected doses of belantamab mafodotin will be administered as an infusion.<br>Drug: Lenalidomide<br>* Lenalidomide will be administered as 25 or 10 mg,orally, with belantamab mafodotin and dexamethasone.<br>Drug: Dexamethasone<br>* Dexamethasone will be administered as 20 or 40 mg, orally with belantamab mafodotin.<br>|
| Experimental: Arm B: Belantamab mafodotin+bortezomib+dexamethasone<br>Participants will receive SINGLE full dose of belantamab mafodotin as 3.4 mg/kg; 2.5 mg/kg; 1.9 mg/kg on Day 1 of each 21-day cycle. SPLIT: belantamab mafodotin will be administered in two equal divided doses: 3.4 mg/kg SPLIT as 1.7 mg/kg dose on Day 1 & 1.7 mg/kg dose on Day 8; 2.5 mg/kg SPLIT dosing as 1.25 mg/kg dose on Day 1 & 1.25 mg/kg dose on Day 8 of each 21-day cycle. STRETCH: belantamab mafodotin will be administered as single dose of 2.5 mg/kg on Day 1 of every alternate 21-day cycles (C1,C3,C5,C7 & so on), 1.9 mg/kg administered on Day 1 of every alternate 21-day cycles (C1,C3,C5,C7 and so on). Step Down(S/D) STRETCH=belantamab mafodotin 2.5 mg/kg dose will be administered on Day 1 C1 followed by 1.9 mg/kg starting dose on Day1 of alternate 21-day cycles C3 onwards (C3,C5,C7, & so on). Bortezomib will be administered at 1.3 mg/m^2 SC/IV on Days 1,4,8, & 11 of every 21-day cycle. Dex will be administered at 20 mg PO or IV on Days 1,2,4,5,8,9,11, & 12 of every 21-day cycle. | Drug: Belantamab mafodotin<br>* Selected doses of belantamab mafodotin will be administered as an infusion.<br>Drug: Dexamethasone<br>* Dexamethasone will be administered as 20 or 40 mg, orally with belantamab mafodotin.<br>Drug: Bortezomib<br>* Bortezomib will be administered as 1.3 mg/m^2, as SC or IV, with belantamab mafodotin and dexamethasone.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of participants with DLTs, Part 1, Treatment A | The number of participants with DLTs will be reported. | Up to 28 days | 
| Number of participants with DLTs, Part 1, Treatment B | The number of participants with DLTs will be reported. | Up to 21 days | 
| Number of participants with AEs and serious adverse events (SAEs), Part 1 | AEs and SAEs will be collected. | Up to 4.5 years | 
| Number of participants with electrocardiogram (ECG) parameters of potential clinical importance (PCI), Part 1 | Twelve-lead ECGs, will be performed, with the participant at designated time points, using an ECG machine, after 5 minutes of rest. The number of participants with PCI values, will be reported. | Up to 4.5 years | 
| Number of participants with abnormal hematology parameters, Part 1 | Blood sample will be collected for the assessment of hematology parameters. | Up to 4.5 years | 
| Number of participants with abnormal clinical chemistry parameters, Part 1 | Blood sample will be collected for the assessment of hematology parameters. | Up to 4.5 years | 
| Number of participants with abnormal urinalysis parameters, Part 1 | Urine samples will be collected for the assessment of urinalysis parameters. | Up to 4.5 years | 
| Number of participants with vital signs of PCI, Part 1 | Number of participants with abnormal vital signs will be assessed. | Up to 4.5 years | 
| Number of participants with AEs and SAEs in Part 2 | AEs and SAEs will be collected. | Up to 4.5 years | 
| Overall Response Rate (ORR) as defined by the International Myeloma Working Group (IMWG) Uniform Response Criteria for multiple myeloma (MM), Part 2 | ORR defined as percentage (%) of participants achieving >=Partial Response (PR) as defined by the IMWG Uniform Response Criteria for MM. | Up to 4.5 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum plasma concentration (Cmax) for belantamab mafodotin, Part 1 and 2, Treatment A | Serial blood samples will be collected for pharmacokinetic (PK) analysis. | Cycle 1: Predose, at end of infusion, 2 hours, 24 hours after end of infusion, Day 4, Day 8 to Day 15, and Day 29 (cycle duration=28 days) | 
| Area under the concentration time curve (AUC) for belantamab mafodotin, Part 1 and 2, Treatment A | Serial blood samples will be collected for PK analysis. | Cycle 1: Predose, at end of infusion, 2 hours, 24 hours after end of infusion, Day 4, Day 8 to Day 15, and Day 29 (cycle duration=28 days) | 
| Time to maximum plasma concentration (Tmax) for belantamab mafodotin, Part 1 and 2, Treatment A | Serial blood samples will be collected for PK analysis. | Cycle 1: Predose, at end of infusion, 2 hours, 24 hours after end of infusion, Day 4, Day 8 to Day 15, and Day 29 (cycle duration=28 days) | 
| Serum half-life (t1/2) for belantamab mafodotin, Part 1 and 2, Treatment A | Serial blood samples will be collected for PK analysis. | Cycle 1: Predose, at end of infusion, 2 hours, 24 hours after end of infusion, Day 4, Day 8 to Day 15, and Day 29 (cycle duration=28 days) | 
| Cmax for belantamab mafodotin, Part 1 and 2, Treatment B | Serial blood samples will be collected for PK analysis. | Cycle 1: Predose, at end of infusion, 2 hours, 24 hours after end of infusion, Day 4, Day 11, and Day 22 (cycle duration=21 days) | 
| AUC for belantamab mafodotin, Part 1 and 2, Treatment B | Serial blood samples will be collected for PK analysis. | Cycle 1: Predose, at end of infusion, 2 hours, 24 hours after end of infusion, Day 4, Day 11, and Day 22 (cycle duration=21 days) | 
| Tmax for belantamab mafodotin, Part 1 and 2, Treatment B | Serial blood samples will be collected for PK analysis. | Cycle 1: Predose, at end of infusion, 2 hours, 24 hours after end of infusion, Day 4, Day 11, and Day 22 (cycle duration=21 days) | 
| t1/2 for belantamab mafodotin, Part 1 and 2, Treatment B | Serial blood samples will be collected for PK analysis. | Cycle 1: Predose, at end of infusion, 2 hours, 24 hours after end of infusion, Day 4, Day 11, and Day 22 (cycle duration=21 days) | 
| Cmax for Lenalidomide, Part 1 and 2, Treatment A | Serial blood samples will be collected for PK analysis. | Pre-dose, and 0.5, 1, 2, 4, and 24 hours post dose on Day 1 of Cycle 1 (cycle duration=28 days) | 
| AUC for Lenalidomide, Part 1 and 2, Treatment A | Serial blood samples will be collected for PK analysis. | Pre-dose, and 0.5, 1, 2, 4, and 24 hours post dose on Day 1 of Cycle 1 (cycle duration=28 days) | 
| Tmax for Lenalidomide, Part 1 and 2, Treatment A | Serial blood samples will be collected for PK analysis. | Pre-dose, and 0.5, 1, 2, 4, and 24 hours post dose on Day 1 of Cycle 1 (cycle duration=28 days) | 
| t1/2 for Lenalidomide, Part 1 and 2, Treatment A | Serial blood samples will be collected for PK analysis. | Pre-dose, and 0.5, 1, 2, 4, and 24 hours post dose on Day 1 of Cycle 1 (cycle duration=28 days) | 
| Cmax for Bortezomib, Part 1 and 2, Treatment B | Serial blood samples will be collected for PK analysis. | Pre-dose and 5, 15, 30 minutes and 1, 2, 4, 6, 10, 24, 48, 72 hours post-dose on Day 1 of Cycle 1 (cycle duration=21 days) | 
| AUC for Bortezomib, Part 1 and 2, Treatment B | Serial blood samples will be collected for PK analysis. | Pre-dose and 5, 15, 30 minutes and 1, 2, 4, 6, 10, 24, 48, 72 hours post-dose on Day 1 of Cycle 1 (cycle duration=21 days) | 
| Tmax for Bortezomib, Part 1 and 2, Treatment B | Serial blood samples will be collected for PK analysis. | Pre-dose and 5, 15, 30 minutes and 1, 2, 4, 6, 10, 24, 48, 72 hours post-dose on Day 1 of Cycle 1 (cycle duration=21 days) | 
| t1/2 for Bortezomib, Part 1 and 2, Treatment B | Serial blood samples will be collected for PK analysis. | Pre-dose and 5, 15, 30 minutes and 1, 2, 4, 6, 10, 24, 48, 72 hours post-dose on Day 1 of Cycle 1 (cycle duration=21 days) | 
| Number of participants with anti-drug antibodies (ADAs) against belantamab mafodotin, Part 1 and 2, Treatment A | The number of participants with ADAs will be assessed. | Pre-dose on Day 1 of Cycle 1, 2, 3, 6, 9, 12 (cycle duration=28 days) | 
| Number of participants with ADAs, against belantamab mafodotin, Part 1 and 2, treatment B | The number of participants with ADAs will be assessed. | Pre-dose on Day 1 of Cycle 1, 2, 3, 6, 9, 12 (Cycle duration= 21 days) | 
| Change from Baseline in symptoms and impacts as measured by Ocular Surface Disease Index (OSDI), Part 1 and 2 | The OSDI, is a 12-item questionnaire designed to assess both the frequency of dry eye symptoms and their impact on vision-related functioning. The OSDI has demonstrated good reliability, validity, sensitivity, and specificity, and can be used as a complement to other clinical and subjective measures of dry eye disease by providing a quantifiable assessment of dry eye symptom frequency and the impact of these symptoms on vision-related functioning. The OSDI will be measured at every 4-weeks, for Treatment A and every 3-weeks, for Treatment B. | Baseline and up to 4.5 years | 
| Change from Baseline in symptoms and impacts as measured by the National Eye Institute Visual Function Questionnaire-25 (NEI-VFQ-25), Part 1 and 2 | The NEI-VFQ-25, consists of a base set of 25 vision-targeted questions representing, 11 vision-related constructs, plus an additional single-item, general health rating question. These include, a global vision rating (1 item); difficulty with near vision activities (3 items); difficulty with distance vision activities (3 items); limitations in social functioning due to vision (2 items); role limitations due to vision (2 items); dependency on others due to vision (3 items); mental health symptoms due to vision (4 items); driving difficulties (3 items); limitations with peripheral vision (1 item), limitations with color vision (1 item); and Ocular pain (2 items). Scores will be measured, every 4-weeks, for Treatment and every 3-weeks, for Treatment B. | Baseline and up to 4.5 years | 
| Change from Baseline in symptoms and impacts as measured by Patient-Reported Outcome Version of the Common Term Criteria for Adverse Events (PRO-CTCAE), Part 1 and 2 | The PRO-CTCAE is a participant-reported outcome measure developed to evaluate symptomatic toxicity in participants on cancer clinical trials. The PRO-CTCAE includes an item library of 124 items representing 80 symptomatic toxicities drawn from the CTCAE. | Baseline and up to 4.5 years | 
| Number of participants with AEs and SAEs, Part 2 | AEs and SAEs will be collected. | Up to 4.5 years | 
| Number of participants with AEs of special interest (AESI), Part 1 and 2 | The AEs of special interest will be collected. | Up to 4.5 years | 
| Number of participants with ophthalmic findings on ophthalmic exam, Part 1 and 2 | The ophthalmic examinations will be done, by an ophthalmologist (or optometrist), to assess participants who develop corneal events, during the study. | Up to 4.5 years | 
| Change from Baseline in health related quality of life (HRQoL) as measured by European Organization for Research and Treatment of Cancer Quality of life Questionnaire 30-item core module (EORTC QLQ-C30), Part 1 and 2 | EORTC QLQ-C30, is a 30-item questionnaire containing both single- and multi-item measures. These include five functional scales (Physical, Role, Cognitive, Emotional, and Social Functioning), three symptom scales (Fatigue, Pain, and Nausea/Vomiting), a Global Health Status/QoL scale, and six single items (Constipation, Diarrhea, Insomnia, Dyspnea, Appetite Loss, and Financial Difficulties). Scores for each scale and single-item measure. A high score for functional scales and for Global Health Status/QoL, represent better functioning ability or HRQoL, whereas a high score for symptom scales and single items represents significant symptomatology. | Baseline and Up to 4.5 years | 
| Change from Baseline in HRQoL as measured by EORTC, 20-Item Multiple Myeloma Module (QLQ-MY20), Part 1 and 2 | QLQ-MY20, module comprises 20 questions that address four myeloma-specific HRQoL domains: Disease Symptoms, Side Effects of Treatment (DSSE), Future Perspective, and Body Image (FPBI). Three of four QLQ-MY20 domains, are multi-item scales: Disease Symptoms (bone aches or pain, back pain, hip pain, arm or shoulder pain, chest pain, and pain increasing with activity); Side effects of treatment (drowsiness, thirst, feeling ill, dry mouth, hair loss, upset by hair loss, tingling hands or feet, restlessness/agitation, acid indigestion/heartburn, and burning or sore eyes); and Future perspective (worry about death and health in future, and thinking about illness). The Body Image scale is single-item scale that addresses physical attractiveness. A high score for DSSE, represents a high level of symptomatology or problems, whereas high score for FPBI, represents better outcomes. | Baseline and Up to 4.5 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Relapsed / Refractory Multiple Myeloma, Dose escalation, Antibody-Drug Conjugate, Dose expansion, belantamab mafodotin, Combination therapy, Belamaf