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Motixafortide

Phase 1

Sickle Cell Disease | Small molecule | Hematology |Biogen Inc.|Last Updated: Aug 11, 2025

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment10

FDA Designations

No designations recorded

Clinical trial landscape

Motixafortide · 1 trial · 1 indication

Phase 1 1
NCT05618301Motixafortide and Natalizumab to Mobilize CD34+ Hematopoietic Stem Cells for Gene Therapies in Sickle Cell Disease (SCD)Sickle Cell Disease
COMPLETED10 Analytics
PHASE1COMPLETED
Motixafortide and Natalizumab to Mobilize CD34+ Hematopoietic Stem Cells for Gene Therapies in Sickle Cell Disease (SCD)
Sickle Cell DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety and tolerability as assessed by the incidence of dose-limiting toxicities (DLTs)
Through 28 days following administration of either motixafortide and/or natalizumab (estimated to be 8 weeks and 4 days)

* All toxicities will be graded using NCI-CTCAE Version 5.0 * A DLT is an event occurring during the DLT period of 28 days following administration of either motixafortide and/or natalizumab that is considered to be at least possibly, probably or definitely related to study treatment by the investigator, and that meets the criteria below: * Hematologic criteria * Any Grade 5 adverse event * Any Grade 4 adverse event, excluding Grade 4 hemolysis, bilirubin increase, leukocytosis, erythrocytosis, thrombocytosis, anemia, leukopenia, or febrile neutropenia * Non-hematologic criteria * Any Grade 4 or 5 adverse event. * Any Grade 3 or higher arterial or venous thromboembolic event * Any Grade 2 or 3 adverse event that does not resolve within 4 weeks; with the exception of \<grade 2 injection site reactions.

Secondary Endpoints

Number of CD34+ hematopoietic stem and progenitor cells (HSPCs) mobilized via leukapheresis per liter (L) of total volume (tV) processed following motixafortide alone and motixafortide + natalizumab
Day 2 and Day 60
Number of CD34+ hematopoietic stem and progenitor cells (HSPCs) mobilized via leukapheresis per liter (L) of adjusted volume (aV) processed, following motixafortide alone and motixafortide + natalizumab
Day 2 and Day 60
Change in kinetics of CD34+ HSC mobilization in response to motixafortide alone and motixafortide + natalizumab in SCD patients, as assessed by CD34+ cells/ul in peripheral blood
From baseline through Day 60
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Motixafortide followed by Motixafortide + NatalizumabEXPERIMENTAL* Consenting and eligible patients will receive a single subcutaneous injection of motixafortide, followed by leukapheresis. Patient will then be followed for 8 weeks for adverse event monitoring. * Following the 8-week monitoring period, patients will receive a single IV infusion natalizumab, then approximately 32 hours later, a single subcutaneous injection of motixafortide, followed by leukapheresis. Patients will then be followed for 8 weeks for adverse event monitoring.

Interventions

NameTypeDescription
MotixafortideDRUGMotixafortide is to be administered as a subcutaneous injection at a dose of 1.25 mg/kg
NatalizumabDRUGNatalizumab will be administered as an IV infusion at a flat dose of 300 mg
LeukapheresisPROCEDURELeukapheresis consisting of a 1 Blood Volume procedure
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Adult patients at least 18 years old * Diagnosis of sickle cell disease (hemoglobin SS or Sβ0 genotype) * Receiving automated RBC exchanges via apheresis-capable central venous access or willing to have apheresis-capable venous access placed. * Able to hold hydroxyurea, voxelo...

Countries:United States
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Frequently asked questions about Motixafortide

What is Motixafortide used for in Sickle Cell Disease?

Motixafortide is an investigational small molecule being studied for use in Sickle Cell Disease. It is being evaluated in combination with natalizumab to mobilize CD34+ hematopoietic stem cells for gene therapies in sickle cell disease. The drug is currently in Phase 1 clinical development and is not yet approved.

Who makes Motixafortide?

Motixafortide is being developed by Biogen Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol BIIB. The drug is currently in Phase 1 clinical development for Sickle Cell Disease.

What phase is Motixafortide in?

Motixafortide is in Phase 1 clinical development. It has completed one Phase 1 trial for Sickle Cell Disease, and the drug remains investigational. It has not been approved by regulatory authorities.

What clinical trials is Motixafortide in?

Motixafortide has been studied in one completed Phase 1 clinical trial, identified as NCT05618301. The trial evaluated Motixafortide and natalizumab to mobilize CD34+ hematopoietic stem cells for gene therapies in Sickle Cell Disease. The study enrolled 10 participants in the United States.

Is Motixafortide the same as any other drug?

No alternative names for Motixafortide have been reported. The drug is known by its generic name Motixafortide and is being developed by Biogen Inc. for Sickle Cell Disease.