NCT04220190 · Rapa Therapeutics LLC
RAPA-501 Therapy for ALS
What this study is about
RAPA-501-ALS is a phase 2/3 expansion group of participants study of RAPA-501 autologous hybrid TREG/Th2 cells in patients living with amyotrophic lateral sclerosis (pwALS).
View original scientific description
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).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Male or female patients ≥ 18 years of age.
- 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.
- . Less than or equal to 24 months since ALS symptom onset.
- Total ALSFRS-R score between 34 and 45.
- 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.
- 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.
- Patients must be ≥ 2 two weeks removed from major surgery or investigational therapy.
- Patients must have recovered from clinical toxicities (\[resolution of CTCAE(v5) \[version 5\] toxicity to a value of ≤ 2\].).
- Serum creatinine ≤ less than or equal to 2.0 mg/dL.
- Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 3 x upper limit of normal (ULN).
- Bilirubin ≤ 1.5 (except if due to Gilbert's disease).
- Pulmonary slow vital capacity (SVC) ≥ 70% of predicted normal.
- No history of abnormal bleeding tendency.
- 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of any study related procedure not part of standard medical care, with the understanding that consent may be withdrawn by the patient participant at any time without prejudice to future medical care.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
- Active uncontrolled infection.
- Hypertension not adequately controlled by ≤ 3 medications.
- History of documented pulmonary embolus within 6 months of enrollment.
- 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.
- Patients with history of coronary artery bypass grafting or angioplasty will receive a cardiology evaluation and be considered on a case-by-case basis.
- HIV, hepatitis B, or hepatitis C seropositive.
- Pregnancy or breastfeeding patients.
- Patients of Subjects of childbearing age, or males who have a partner of childbearing potential, who are unwilling to practice contraception.
- 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.
Where
- Boston, Massachusetts
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 18, 2025 · Source of record for eligibility and locations