Mavorixafor (Xolremdi) - To treat WHIM syndrome (warts, hypogammaglobulinemia, infections and myelokathexis) Drug Approval Package: XOLREMDI * Skip to main content * Skip to FDA Search * Skip to footer links An official website of the United States governmentHere's how you know The .gov means it's official.Federal government websites often end in .gov or .mil. Before sharing sensitive information
A phase 3 randomized trial of mavorixafor, a CXCR4 antagonist, for WHIM syndrome We investigated efficacy and safety of mavorixafor, an oral CXCR4 antagonist for participants with Warts, Hypogammaglobulinemia, Infections, and Myelokathexis (WHIM) syndrome, a rare immunodeficiency caused by CXCR4 gain-of-function variants. This randomized (1:1), double-blind, placebo-controlled, phase 3 trial enrolled participants aged ≥12 years with WHIM syndrome and absolute neutrophil count (ANC) ≤400/μL. Participants received once-daily mavorixafor or placebo for 52 weeks. Primary endpoint was time (hours) above ANC threshold ≥500/μL (TATANC; over 24 hours). Secondary endpoints included TAT absolute lymphocyte count ≥1000/μL (TATALC; defined similar to TATANC); absolute changes in white blood cell (WBC
Results of a Phase 2 Trial of an Oral CXCR4 Antagonist Mavorixafor for Treatment of WHIM Syndrome. Warts, hypogammaglobulinemia, infections, and myelokathexis (WHIM) syndrome is a rare primary immunodeficiency caused by gain-of-function mutations in the CXCR4 gene. We report the safety, tolerability, pharmacokinetics, pharmacodynamics, and preliminary efficacy of mavorixafor from a phase 2 open -label dose-escalation and extension study in 8 adult patients with genetically confirmed WHIM syndrome. Mavorixafor is an oral small molecule selective antagonist of the CXCR4 receptor that increases mobilization and trafficking of white blood cells from the bone marrow. Patients received escalating doses of mavorixafor, up to 400 mg once daily. Five patients continued on the extension study for up
A Study to Investigate Pharmacokinetics (PK) and Safety of a Single Dose of Mavorixafor in Participants With Hepatic Impairment (HI) Compared to Matched Healthy Volunteers With Normal Hepatic Function The purpose of this study is to measure the effect of HI on the PK, safety, and tolerability of a single dose of mavorixafor compared to matched healthy volunteers (HVs) with normal hepatic function.
Drug-Drug Interaction Potential of Mavorixafor The main purpose of this study is to evaluate drug-drug interaction (DDI) of orally administered mavorixafor with cytochrome P3A (CYP3A) inducers carbamazepine (a strong CYP3A inducer) or efavirenz (a moderate CYP3A inducer) in healthy male and female participants.
A Study of Mavorixafor in Participants With Congenital and Acquired Primary Autoimmune and Idiopathic Chronic Neutropenic Disorders Who Are Experiencing Recurrent and/or Serious Infections The purpose of this study is to demonstrate the efficacy and evaluate the safety, and tolerability of mavorixafor in participants with congenital or acquired primary autoimmune and idiopathic chronic
A Study of Mavorixafor in Combination With Ibrutinib in Participants With Waldenstrom's Macroglobulinemia (WM) Whose Tumors Express Mutations in MYD88 and CXCR4 The primary objective of the study is to establish a pharmacologically active dose of mavorixafor in combination with ibrutinib based on pooled safety, clinical response, pharmacokinetic (PK) and pharmacodynamic (PD) data to select the recommended dose for a randomized registrations trial. This is an intrapatient dose-escalation study. Three dose levels of mavorixafor will be explored: 200 milligrams (mg) once daily (QD) (dose level 1), 400 mg QD (dose level 2), and 600 mg QD (dose level 3). Ibrutinib will be administered at its labeled dose for participants with WM, 420 mg orally QD. Each treatment cycle will be 28 days.
Efficacy and Safety Study of Mavorixafor in Participants With Warts, Hypogammaglobulinemia, Infections, and Myelokathexis (WHIM) Syndrome This study has a double-blind, Randomized Placebo-Controlled Period and an Open-Label Period. The primary objective of the Randomized Placebo-Controlled Period is to demonstrate the efficacy of mavorixafor in participants with WHIM syndrome as assessed by increasing levels of circulating neutrophils compared with placebo, and relative to a clinically meaningful threshold. The primary objective of the Open-Label Period is to evaluate the safety and tolerability of mavorixafor in participants with WHIM syndrome. Participants are allowed to continue treatment in the Open-Label Period, if regionally applicable, until mavorixafor becomes commercially available
A Study of Mavorixafor in Participants With Congenital Neutropenia and Chronic Idiopathic Neutropenia Disorders This is a 2-part study of mavorixafor in participants diagnosed with chronic neutropenia. The main goal of Part 1 (Phase 1b) is to help researchers learn more about how the investigational medicine, mavorixafor, impacts people living with chronic neutropenia (including congenital , idiopathic, and cyclic). In Part 2 (Phase 2), the safety and tolerability of chronic dosing of mavorixafor will be evaluated in a larger participant population and the impact of 6-month chronic dosing of mavorixafor on participant neutropenia. Part 1: Participants will receive one oral dose of mavorixafor and be monitored for 8 hours to see if neutrophil cell counts increase.Part 2: Eligible participants
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number): Choueiri TK, Atkins MB, Rose TL, Alter RS, Ju Y, Niland K, Wang Y, Arbeit R, Parasuraman S, Gan L, McDermott DF. A phase 1b trial of the CXCR4 inhibitor mavorixafor and nivolumab in advanced renal cell carcinoma patients with no prior response to nivolumab monotherapy. Invest New Drugs. 2021 Aug;39(4):1019-1027
A Trial of X4P-001 in Patients With WHIM Syndrome A Dose Determination and Safety Study of X4P-001 (Mavorixafor) in Participants With Warts, Hypogammaglobulinemia, Infections, and Myelokathexis (WHIM) Syndrome - Full Text View - ClinicalTrials.gov Try the modernized ClinicalTrials.gov beta website. Learn more about the modernization effort. Hide glossary GlossaryStudy record managers: refer WarningYou have reached the maximum number of saved studies (100).Please remove one or more studies before adding more. A Dose Determination and Safety Study of X4P-001 (Mavorixafor) in Participants With Warts, Hypogammaglobulinemia, Infections, and Myelokathexis (WHIM) Syndrome The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study