A Phase 1, First-in-Human, Open-Label, Dose Escalation Study of JNJ-87562761 in Relapsed/Refractory Multiple Myeloma
The purpose of this study is to determine the recommended phase 2 dose(s) (RP2D\[s\]) of JNJ-87562761 in Part 1 (dose escalation), and to determine the safety and tolerability at RP2D in Part 2 (dose expansion) in participants with multiple myeloma (MM) whose disease has come back after treatment (relapsed) or hasn't responded to treatment (refractory).
• Relapsed, refractory multiple myeloma with measurable disease defined as: (a) Serum monoclonal paraprotein (M-protein) level greater than (\>)0.5 grams per deciliter (g/dL); or (b) Urine M-protein level \>200 milligrams per 24 hours (mg/24 hours); or (c) Light chain multiple myeloma: serum immunoglobulin free light chain (FLC) \>10 milligrams per deciliter (mg/dL) and abnormal serum immunoglobulin kappa-lambda FLC ratio
• Must have had prior therapy including a proteasome inhibitor, immunomodulatory agent and anti-CD38 therapy
• Have an eastern cooperative oncology group (ECOG) performance status of 0 to 1
• Have an estimated glomerular filtration rate (eGFR), of \> 30 millilitres (mL)/min/1.73 meter square (m\^2) computed per 2021 chronic kidney disease epidemiology collaboration (CKD-EPI) creatinine equation
• While on study treatment and for 6 months after the last dose of study treatment, a participant must: (a) Not breastfeed or be pregnant; (b) Not donate gametes (that is, eggs or sperm) or freeze for future use for the purposes of assisted reproduction; (c) Wear an external condom