Evaluating QRL-201 for safety in ALS patients

A Multi-Center, Randomized, Double-Blind Placebo Controlled Multiple-Ascending Dose Study to Evaluate the Safety and Tolerability of QRL-201 in Amyotrophic Lateral Sclerosis

Phase 1 Interventional QurAlis Corporation · NCT05633459

This study is testing a new drug called QRL-201 to see if it's safe for people with ALS.

Quick facts

PhasePhase 1
Study typeInterventional
Enrollment64 (estimated)
Ages18 Years to 80 Years
SexAll
SponsorQurAlis Corporation Industry-sponsored
Locations14 sites (Leuven and 13 other locations)
Trial IDNCT05633459 on ClinicalTrials.gov

What this trial studies

This Phase 1 study aims to assess the safety and tolerability of QRL-201, an investigational drug, in individuals diagnosed with Amyotrophic Lateral Sclerosis (ALS). Participants will receive multiple ascending doses of QRL-201 administered intrathecally, with a portion receiving a placebo for comparison. The study will involve two dose escalation cohorts of 8 participants each, followed by an additional 48 participants, to gather data on the drug's pharmacokinetics and overall safety profile.

Who should consider this trial

Good fit: Ideal candidates include adults aged 18 to 80 diagnosed with ALS within the last 24 months and with a slow vital capacity greater than 50%.

Not a fit: Patients with specific genetic variants related to ALS or those currently participating in other clinical studies may not benefit from this trial.

Why it matters

Potential benefit: If successful, this study could lead to a new treatment option that improves the safety and management of ALS.

How similar studies have performed: While this approach is novel, previous studies involving antisense oligonucleotides have shown promise in treating other neurological conditions.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Male or female participants aged 18 to 80 years diagnosed with ALS
* ALS symptom onset within 24 months of Screening
* Slow vital capacity \>50%
* Clinical or electrodiagnostic evidence of lower motor neuron involvement
* Not pregnant and not nursing
* Willing and able to practice effective contraception
* Able to tolerate lumbar puncture
* If on approved therapies for the treatment of ALS during the course of the study, must be on a stable dose (at the Sponsor's discretion)

Exclusion Criteria:

* Pathogenic variant, likely pathogenic variant, or variant of uncertain significance in the superoxide dismutase 1 (SOD1) and/or fused in sarcoma (FUS) genes
* Currently enrolled in any other clinical study involving either an investigational product (IP) or off-label use of a drug or device
* Prior exposure to stem cell or gene therapy products
* Any contraindication to intrathecal drug administration
* Abnormal laboratory values deemed clinically significant by the Investigator
* Significant infection or known inflammatory process
* Any sign and/or history of neurological conditions and other neuromuscular disorders that could affect the electrophysiological recordings.
* An EEG that shows signs of abnormal electrical activity (e.g., epilepsy)

Where this trial is running

Leuven and 13 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Amyotrophic Lateral SclerosisALS, Stathmin-2, STMN2, ASO, Antisense Oligonucleotide
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.