Recruiting
Phase 2
Phase 3

RAPA-501

Sponsor:

Rapa Therapeutics LLC

Code:

NCT04220190

Conditions

Amyotrophic Lateral Sclerosis

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Interventions

RAPA-501 Autologous T stem cells

Study Details

Brief summary:

RAPA-501-ALS is a phase 2/3 expansion cohort study of RAPA-501 autologous hybrid TREG/Th2 cells in patients living with amyotrophic lateral sclerosis (pwALS).

Conditions

Amyotrophic Lateral Sclerosis

Study ID

NCT04220190

Start date

Jan 2, 2025

Status verified date

Jun, 2025

Completion date

Jun 1, 2027

Anticipated

Primary completion date

Jul 1, 2026

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Inclusion Criteria:

1. Male or female patients ≥ 18 years of age.
2. Patients with sporadic or familial amyotrophic lateral sclerosis (ALS) diagnosed as laboratory-supported possible, probable, or definite according to World Federation of Neurology El Escorial Criteria.
3. . Less than or equal to 24 months since ALS symptom onset.
4. Total ALSFRS-R score between 34 and 45.
5. Must have a source of autologous T cells potentially sufficient to manufacture RAPA-501 cells, as defined by a peripheral CD3+ T cell count ≥ 500 cells per μl.
6. Patients may continue riluzole (Rilutek®), and/or edaravone (Radicava®), and/or sodium phenylbutyrate/taurusodial (Relyvrio™) if on a stable dose for at least 30 days prior to the screening visit.
7. Patients must be ≥ 2 two weeks removed from major surgery or investigational therapy.
8. Patients must have recovered from clinical toxicities (\[resolution of CTCAE(v5) \[version 5\] toxicity to a value of ≤ 2\].).
9. Serum creatinine ≤ less than or equal to 2.0 mg/dL.
10. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 3 x upper limit of normal (ULN).
11. Bilirubin ≤ 1.5 (except if due to Gilbert's disease).
12. Pulmonary slow vital capacity (SVC) ≥ 70% of predicted normal.
13. No history of abnormal bleeding tendency.
14. Voluntary written consent must be given before performance of any study related procedure not part of standard medical care, with the understanding that consent may be withdrawn by the patient participant at any time without prejudice to future medical care.

Exclusion Criteria:

1. Active uncontrolled infection.
2. Hypertension not adequately controlled by ≤ 3 medications.
3. History of documented pulmonary embolus within 6 months of enrollment.
4. Clinically significant cardiac pathology, as defined by: myocardial infarction within 6 months prior to enrollment, Class III or IV heart failure according to NYHA, uncontrolled angina, severe uncontrolled ventricular arrhythmias, or electrocardiographic evidence of acute ischemia or active conduction system abnormalities.
5. Patients with history of coronary artery bypass grafting or angioplasty will receive a cardiology evaluation and be considered on a case-by-case basis.
6. HIV, hepatitis B, or hepatitis C seropositive.
7. Pregnancy or breastfeeding patients.
8. Patients of Subjects of childbearing age, or males who have a partner of childbearing potential, who are unwilling to practice contraception.
9. Patients Subjects may be excluded at the Principal Investigator discretion of the PI or if it is deemed that allowing participation would represent an unacceptable medical or psychiatric risk.

Study Design

Enrollment

41 participants

Anticipated

Intervention Model

Single group

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: RAPA-501 Autologous T stem cells

Phase 2/3 Expansion Cohort, Single-agent RAPA-501 T stem cells 80 x 10EE6 cells per infusion (no host conditioning)

Interventions

RAPA-501 Autologous T stem cells

Experimental: Phase 2/3 Expansion Cohort, Single-agent RAPA-501 T stem cells 80 x 10EE6 cells per infusion (no host conditioning)

Primary outcome measure

  • In the expansion cohort enrolling standard-risk pwALS, determine the feasibility and safety of the highest established safe dose of RAPA-501 (80 x 10^6 cells per infusion). [ Time Frame: Through 30 Weeks On-Study ]

Central Contacts and Locations

Central contacts

Daniel Fowler, M.D. Chief Medical Officer, RAPA Therapeutics, LLC

(301) 518-3104dan@rapatherapeutics.com

Jennifer Sunga Regulatory Affairs Associate, RAPA Therapeutics, LLC

jsunga@rapatherapeutics.com

Locations

Massachusetts General Hospital

Recruiting

Boston, Massachusetts, United States, 02114

Contacts

Principal Investigator:

James Berry, M.D.

More Information

Sponsor

Rapa Therapeutics LLC

Last update posted

Jun 18, 2025

Last verified

Jun, 2025

Keywords

  • Amyotrophic Lateral Sclerosis
  • RAPA-501
  • Autologous TREG/Th2 T stem cell therapy
  • Orphan Disease
  • rare disease

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Rapa Therapeutics LLC on 2025-06-18.