A Phase I/II Trial of BMS-986253 in Myelodysplastic Syndromes

Phase I: Optimal Biological Dose (OBD) for Human Humax (HuMax)-Interleukin 8 (IL-8) (BMS-986253)

Time Frame: First 28 days (C1D28) on up to 30 days.

OBD of BMS-986253 with and without deoxyribonucleic acid (DNA) methyltransferase inhibitors (DNMTi), as determined by dose limiting toxicity (DLT) occurring by cycle 1 day 28 (C1D28). DLT is defined as any of the following: any grade ≥ non-hematologic toxicity that is possibly, probably, or definitely related to study drug. Liver injury as defined by a positive Hy's Law. And adverse reaction that leads to dose reduction or withdrawal. OBD is the lowest tolerated dose level showing optimal biological activity, defined as maximal suppression of serum free IL-8 levels. The goal is to achieve IL-8 levels below the lower limit of detection of the assay in real time by Ultrasensitive immunoassay based on Quanterix Simoa technology. The lower limit of quantification = 0.86 pg/mL by Myriad-Rules Based Medicine (RBM).

Phase II: Overall Response Rate

Time Frame: 6 months

Overall response rate (ORR= Complete Remission (CR) + Partial Remission (PR) + \[marrow CR + hematologic improvement (HI\]) of Human Humax (HuMax)-interleukin 8 (IL-8) (BMS-986253) with and without deoxyribonucleic acid (DNA) methyltransferase inhibitors (DNMTi) after 6 cycles of therapy was assessed by the 2006 International Working Group response criteria for Myelodysplastic Syndromes. Complete Remission (CR) is bone marrow ≤55% myeloblasts with normal maturation of all cell lines. Persistent dysplasia will be noted. Partial Remission (PR) is all CR criteria if abnormal before treatment except bone marrow blasts decreased by ≥50% over pretreatment but still \>5%. And cellularity and morphology not relevant.

Phase I: Recommended Phase 2 Dose (RP2D) of Human Humax (HuMax)-Interleukin 8 (IL-8) (BMS-986253)

Time Frame: First 28 days (C1D28)

RP2D of BMS-986253 with and without deoxyribonucleic acid (DNA) methyltransferase inhibitors (DNMTi), as determined by dose -limiting toxicity (DLT) occurring by cycle 1 day 28 (C1D28). RP2D is defined as the optimal biological dose expected to be safe and of potential efficacy. It serves as a starting point for further investigations in future phase 2 clinical trials. DLT is defined as any of the following: ang grade ≥ non-hematologic toxicity that is possibly, probably, or definitely related to study drug. Liver injury as defined by a positive Hy's Law. And adverse reaction that leads to dose reduction or withdrawal.

Phase I: Number of Grades 1-5 Serious and/or Non-serious Adverse Events Related to Human Humax (HuMax)-Interleukin 8 (IL-8) (BMS-986253) and Deoxyribonucleic Acid (DNA) Methyltransferase Inhibitors (DNMTi)

Time Frame: First 28 days and follow up after the end of the treatment cycle; approximately 2 months.

Safety as measured by incidence of adverse events (AEs) and serious adverse events (SAEs), and AEs leading to discontinuation, death, and laboratory abnormalities. Adverse events were assessed by the Common Terminology Criteria for Adverse Events (CTCAE v5.0). A non-serious adverse event is any untoward medical occurrence. A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life-threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned. Grade 1 is mild. Grade 2 is moderate. Grade 3 is severe. Grade 4 if life-threatening. Grade 5 is death related to adverse event.

Phase II: Fraction of Participants With Clinical Response

Time Frame: Study treatment until occurrence of disease progression, death, or unacceptable toxicity or until response assessment on Cycle 7 day 1 (C7D1), a maximum of 6 cycles

Clinical response was assessed by the assessed by the 2006 International Working Group response criteria for Myelodysplastic Syndromes and reported with 95% confidence interval. Complete Remission (CR) is bone marrow ≤55% myeloblasts with normal maturation of all cell lines. Persistent dysplasia will be noted. Partial Remission (PR) is all CR criteria if abnormal before treatment except bone marrow blasts decreased by ≥50% over pretreatment but still \>5%. And cellularity and morphology not relevant. Stable disease is failure to achieve at least PR, but no evidence of progression for \>8 weeks. Progression is less than 5% blasts: ≥50% increase in blasts to \>5% blasts; 5%-10% blasts: ≥50% increase to 10% blasts; transfusion dependence. Relapse after CR or PR is at least 1 of the following: return to pre-treatment bone marrow blast percentage or decrement of ≥50% from maximum remission/response levels in granulocytes or platelets.