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Ongoing Treatment Trials for Prion Disease

Prion Disease is currently an invariably fatal condition without treatment or cure. Despite multiple prior treatment studies, including quinacrine, doxycycline, and pentosan polysulfate, no investigational treatments have benefited patients with prion disease. However, new treatments are currently being investigated. This site will be regularly updated with available treatment trial information for prion disease. 


Below is a list of clinical trials for prion diseases. 

For additional information about each study, including eligibility criteria, study locations, and enrollment details, please visit the linked ClinicalTrials.gov pages.


Clinical Trial

ClinicalTrials.gov Page

Enrollment (U.S. Sites)

Enrollment (International Sites)

Community Statement

ION717-CS2: A Phase 1/2a Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Intrathecally Administered ION717 in Patients with Prion Disease

ION717-CS2

Closed

Open

3/17/2026

PrP-targeting siRNA Safety & Mechanism Study (PRiSM)

PRiSM

Open

N/A

4/22/2026