A Study of PBFT02 in Patients With Frontotemporal Dementia and Progranulin Mutations (FTD-GRN)
a study on Dementia Frontotemporal Dementia Frontotemporal Lobar Degeneration Primary Progressive Aphasia
Summary
- Eligibility
- for people ages 35-75 (full criteria)
- Location
- at San Francisco, California and other locations
- Dates
- study startedestimated completion
Description
Summary
PBFT02 is a gene therapy for frontotemporal dementia intended to deliver a functional copy of the GRN gene to the brain. This study will assess the safety, tolerability and efficacy of this treatment in patients with frontotemporal dementia and mutations in the progranulin gene (FTD-GRN).
Official Title
A Phase 1b Open-Label, Multicenter, Dose-Escalation Study to Assess the Safety, Tolerability, and Pharmacodynamic Effects of a Single Dose of PBFT02 Delivered Into the Cisterna Magna of Adult Subjects With Frontotemporal Dementia and Mutations in the Progranulin Gene
Details
PBFT02 is an adeno-associated viral vector serotype 1 carrying GRN, the gene encoding for human progranulin, formulated as a solution for injection into the cisterna magna. This is a global interventional, multicenter, open-label, single-arm, dose-escalation study of PBFT02 delivered as a one-time dose administered into the cisterna magna to patients with FTD-GRN. Subjects aged ≥ 35 and ≤ 75 years with early symptomatic FTD-GRN may be enrolled into the study. Two dose levels of PBFT02 will be studied in patients with FTD-GRN. The study will sequentially enroll 2 cohorts. An optional third dose level cohort may be enrolled based on the results of the first two cohorts. This is a 5-year study, with a 2-year main study, followed by a 3-year safety extension.
Keywords
Frontotemporal Dementia, Progranulin Mutations, FTD-GRN, Gene Therapy, Dementia Gene Therapy, AAV1, Fronto-temporal Dementia, Dementia, Primary Progressive Aphasia, Pick Disease of the Brain, PBFT02
Eligibility
You can join if…
Open to people ages 35-75
- Documented to be a pathogenic GRN mutation carrier
- Clinical diagnosis of frontotemporal dementia
- Have a reliable informant / caregiver (and back-up informant / caregiver) who personally speaks with or sees the subject at least weekly
- Living in the community (i.e., not in a nursing home); assisted living may be permitted at the discretion of the investigator
You CAN'T join if...
- Classification of the GRN mutation as "not pathogenic," "likely benign variant," "benign variant," or "pathogenic nature unclear"
- Previous treatment with any gene therapy. Any other therapies with the potential to alter PGRN levels must be washed out for at least 5 half-lives prior to entry into this study
- Homozygous GRN mutation carrier
- Rosen-modified Hachinski Ischemic Scale score > 7
- Known presence of a structural brain lesion (eg, tumor, cortical infarct) that could reasonably explain symptoms in a symptomatic subject
- Known presence of an AD-causing mutation in PSEN1, PSEN2 or APP based on genetic testing history (if performed)
- Previous history of Korsakoff encephalopathy, severe alcohol or substance dependence (within 5 years of onset of dementia), except where onset of increased alcohol consumption occurs at the time of FTD disease onset
- History of untreated vitamin B12 deficiency
- Presence of untreated hypothyroidism (thyroid stimulating hormone [TSH] > ULN and free T4 < LLN)
- . eGFR ≤ 30 ml/min (as calculated using the CKD-EPI equation)
- . Alanine aminotransferase [ALT] or aspartate aminotransferase [AST] > 2 × ULN, or total bilirubin > ULN)
- . Respiratory failure that requires supplemental oxygen
- . Inability to provide full consent or the lack of a legally authorized caregiver with adequate contact who can provide consent
- . Any contraindication to MRI or lumbar puncture (LP) (eg, local infection, history of thrombocytopenia, coagulopathy)
- . Any contraindication to the ICM administration procedure
- . Medical conditions or laboratory or vital sign abnormalities that would increase risk of complications from intra-cisterna magna injection, anesthesia, LP, and/or MRI (e.g., fever, hypoxia, tachycardia, or evidence of active infection)
- . Immunocompromised status
- . Peripheral axonal sensory neuropathy
- . Receipt of a vaccine within 14 days of dosing
- . A positive test result for human immunodeficiency virus (HIV), human T cell leukemia virus (HTLV) type 1 or type 2, or Hepatitis B or C; a Mycobacterium tuberculosis positive test within 1 year of or determined at screening
- . Malignant neoplasia (except localized skin cancer) or a documented history of hereditary cancer syndrome
- . Any concurrent disease that, in the opinion of the investigator, may cause cognitive impairment unrelated to GRN mutations, including other causes of dementia, neurosyphilis, hydrocephalus, stroke, small vessel ischemic disease, uncontrolled hypothyroidism, or vitamin deficiency
- . Current or recent history of clinically significant suicidal ideation within the past 6 months
- . For females of childbearing potential, a positive serum pregnancy test at the screening visit, a positive serum result on Day 1 prior to administration of the investigational product, or unwillingness to have additional pregnancy tests during the study. Females of childbearing potential must use a highly effective method of birth control or engage in abstinence until 90 days postdose
- . Women who are breastfeeding
- . For sexually active men, unwillingness to use a medically accepted method of double-barrier contraception (such as a condom/diaphragm used with spermicide) or engage in abstinence from the date of screening until 90 days postdose
- . Any condition (eg, history of any disease, evidence of any current disease, any finding upon physical examination, or any laboratory abnormality) that, in the opinion of the investigator, would put the subject at undue risk or would interfere with evaluation of the investigational product or interpretation of subject safety or study results
- . Any acute illness requiring hospitalization within 30 days of enrollment
- . Failure to meet the protocol-specified coagulation test criteria:
- Platelet count over 100,000 per uL
- INR less than 1.5
- aPTT less than 40 seconds
- . Use of anticoagulants in the 2 weeks prior to screening, or anticipated use of anticoagulants during the study. Antiplatelet therapies may be acceptable
- . Hypersensitivity or contraindications to corticosteroid use
- . Known or suspected intolerance or hypersensitivity to PBFT02 or any of its ingredients or to closely related compounds
Locations
- University of California at San Francisco
not yet accepting patients
San Francisco California 94143 United States - University of Texas at Houston
accepting new patients
Houston Texas 77030 United States
Details
- Status
- accepting new patients at some sites,
but this study is not currently recruiting here - Start Date
- Completion Date
- (estimated)
- Sponsor
- Passage Bio, Inc.
- ID
- NCT04747431
- Phase
- Phase 1/2 research study
- Study Type
- Interventional
- Participants
- Expecting 6 study participants
- Last Updated