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Study identifier: NCT04732429 Synced from ClinicalTrials.gov · July 28, 2026
● Terminated

Study of HST5040 in Subjects With Propionic or Methylmalonic Acidemia

Condition: Methylmalonic Acidemia · Propionic Acidemia  ·  Sponsor: HemoShear Therapeutics

PhasePhase 2
Planned participants26
Who can joinAll sexes, 2 Years to no upper limit
Healthy volunteersNo

About this study

This is an interventional study to assess the safety, PK, and efficacy of HST5040 in 12 subjects - 6 with Methylmalonic Acidemia (MMA) and 6 with Propionic Acidemia (PA). The study consists of 3 parts: * Part A: Open-label, within-subject, dose escalation study in PA and MMA subjects ≥ 2 years old to identify a safe and pharmacologically active (optimal) dose of HST5040 for use in Part B. Subjects will continue in a Part A open-label extension until all subjects complete Part A and the optimal dose of HST5040 is identified for use in Part B. * Part B: 6-month, randomized, double-blind, placebo-controlled, 2-period crossover in the same subjects from Part A to evaluate safety and efficacy of the optimal dose of HST5040 in addition to standard of care (SoC). * Part C: open-label long-term extension study in PA and MMA subjects ≥ 2 years old (N = approximately 12, 6 each) to evaluate the long-term safety and efficacy of the optimal dose of HST5040. This study will determine whether HST5040 can improve levels of disease-associated toxins that accumulate in patients with PA and MMA.

This description comes directly from the study's public registry record.

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Contact details are listed per location below or on the registry record.

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Locations (16)

Rady Children's HospitalSan Diego, California, United States
YaleNew Haven, Connecticut, United States
Children's National Health SystemWashington D.C., District of Columbia, United States
Emory University School of MedicineAtlanta, Georgia, United States
Ann & Robert H. Lurie Children's Hospital of ChicagoChicago, Illinois, United States
Boston Children's HospitalBoston, Massachusetts, United States
University of MinnesotaMinneapolis, Minnesota, United States
Children's Mercy Hospital Kansas CityKansas City, Missouri, United States
University Hospitals Cleveland Medical CenterCleveland, Ohio, United States
Nationwide Children's HospitalColumbus, Ohio, United States
University of Pittsburgh Medical Center - Children's Hospital of PittsburghPittsburgh, Pennsylvania, United States
Vanderbilt University Medical CenterNashville, Tennessee, United States

+ 4 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT04732429