TauopathiesEarly Phase 1NCT06932809
Study of Biodistribution, Metabolism, Excretion and Brain Uptake 18F-JSS20-183A
A Early Phase 1 study testing 18F-JSS20-183A PET, Brain MRI and Amyloid PET in people with Tauopathies, run by University of Pennsylvania at 2 sites in United States.
Trial summary
The current protocol is to determine the biodistribution, metabolism, excretion and brain uptake of 18F-JSS20-183A. The goal of this radiotracer is to quantify 4Repeat Tau (4Rtau) protein that is abnormally deposited in the brain of people with a class of neurodegenerative diseases called tauopathies, such as… Read more about this study
- Who is it for?
- Ages 40 to 85 years
- Conditions the study is for
- Tauopathies
- What is being tested?
- 18F-JSS20-183A PET, Brain MRI and Amyloid PET
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 90 participants
- Where
- 2 sitesUnited States
- Study dates
- 9 May 2025to Apr 2030
- Phase
- Early Phase 1
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 40 to 85 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients in all cohorts will be male or female adults from 40 to 85 years of age.
- Participants must be informed of the investigational nature of this study and be willing to provide written informed consent and participate in this study in accordance with institutional and federal guidelines prior to study-specific procedures or Participants who are deemed unable to provide informed consent must have a designated study partner present for consent and to accompany them to study visits.
- Investigators will ask disease cohort participants to agree to brain donation, but this choice is not mandatory for participation in this study.
- Diagnosis-specific inclusion criteria: Clinical diagnoses will be determined by consensus committee (except AD and HC cohorts) for diagnostic agreement using video exams of each participant that are stored at WashU in a secured video repository with view-only access exclusively by secured virtual private network (VPN) connection. Video exam and screening assessments for PSP, CBS, MSA, PD, and FTLD may not be required to be repeated if they have been done within 6 months of enrollment, unless requested at the discretion of an investigator to document changes in clinical progression. A consensus committee will not be required to be repeated for participants who have already had a consensus committee diagnosis documented.
Who cannot join
- Females who are pregnant or breast feeding will be excluded, a urine pregnancy test will be performed in women of child-bearing potential prior to injection of 18F-JSS20-183A 11C-PiB or 18F-Florbetaben
- Forms of parkinsonism other than PSP-RS, and PD as defined above
- History of significant or ongoing alcohol abuse or substance abuse or dependence based on medical record review or self-reported
- Contraindications or inability to tolerate imaging, arterial line or IV placement or blood draw procedures in the opinion of an investigator or treating physician
- Contraindication to MRI, such as non-compatible implanted medical device
- Any current medical condition, illness, or disorder as assessed by medical record review and/or self-reported that is considered by a physician or investigator to be a condition that could compromise participant safety or successful participation in the study
Trial locations and contacts
2 sites in 1 country. Contact the study team or a site near you to ask about taking part.
United States2 sites, 2 recruiting
- Recruiting
University of Pennsylvania
Philadelphia, Pennsylvania, 19104
Erin Schubert, 215-662-3041, erinshu@pennmedicine.upenn.edu
Ilya Nasrallah, MD, PhD, ilya.nasrallah@pennmedicine.upenn.edu
- Recruiting
University of California
San Francisco, California, 94143
Karen Smith, 415-514-7386, karen.smith@ucsf.edu
Carol Soppe, 415-514-7386, carol.soppe@ucsf.edu
About this study
Official title: Center Without Walls for Imaging Proteinopathies With PET (CW2IP2): Phase I Pilot Study of Biodistribution, Metabolism, Excretion and Brain Uptake of 18F-JSS20-183A
The current protocol is to determine the biodistribution, metabolism, excretion and brain uptake of 18F-JSS20-183A. The goal of this radiotracer is to quantify 4Repeat Tau (4Rtau) protein that is abnormally deposited in the brain of people with a class of neurodegenerative diseases called tauopathies, such as Progressive Supranuclear Palsy (PSP), Corticobasal Syndrome (CBS), syndromes of genetic Frontotemporal Lobar Degeneration (genetic FTLD) as well as participants with Parkinson disease (PD), Alzheimer's Disease (AD) and healthy controls. This multicenter project funded by an NIH U19 grant, is centered at U Pennsylvania (Penn, Grant PI: Robert Mach) in collaboration with U Pittsburgh (Pitt), Yale U, U of California at San Francisco (UCSF) and Washington University in St. Louis (WUSTL). The University of Pennsylvania will act as the sIRB for this multi-center human subjects project and participants will be recruited from all sites.
Read the detailed description
The current protocol is to determine the biodistribution, metabolism, excretion and brain uptake of 18F-JSS20-183A. The goal of this radiotracer is to quantify 4Repeat Tau (4Rtau) protein that is abnormally deposited in the brain of people with a class of neurodegenerative diseases called tauopathies, such as Progressive Supranuclear Palsy (PSP), Corticobasal Syndrome (CBS), syndromes of genetic Frontotemporal Lobar Degeneration (genetic FTLD) as well as participants with Parkinson disease (PD), Alzheimer's Disease (AD) and healthy controls. This multicenter project funded by an NIH U19 grant, is centered at U Pennsylvania (Penn, Grant PI: Robert Mach) in collaboration with U Pittsburgh (Pitt), Yale U, U of California at San Francisco (UCSF) and Washington University in St. Louis (WUSTL). The University of Pennsylvania will act as the sIRB for this multi-center human subjects project and participants will be recruited from all sites.
Participating clinical sites will recruit up to 90 subjects total; up to 20 people with PSP, 10 with CBS, 15 with genetic FTLD, 10 with AD, 10 with PD and 25 healthy controls across sites with all participants ranging from 40-85 years old. We will encourage equal participation of males and females.
This protocol will include up to 90 evaluable participants across all centers (Penn, Yale, UCSF, WUSTL, Pitt), the whole-body biodistribution analysis will be done at Penn. Investigators anticipate enrollment of up to 15-20 participants at each clinical site, who will undergo up to 120-minutes of dynamic PET/CT scan over the brain, or brain and body if scanned on a long axial-field-of-view scanner, starting approximately at the same time as the injection of radiotracer. A second IV or an arterial line may be placed, preferably in the arm contralateral to the side of injection, for blood metabolite analysis and/or radioactive counts at various times during the scanning session. These blood sample collections can be omitted at the discretion of the investigator. For participants at Penn that may be part of BioD analysis, urine may be collected at the end of the scan session. Participants may also undergo a research brain MRI that may be on the same or a separate day from the PET.
PET imaging sessions will include an injection of ≤ 8 mCi (approximate range for most studies is anticipated to be 3-8 mCi at sites with a standard PET scanner or a lower dose may be used at sites with a high sensitivity scanner) of 18F-JSS20-183A. Biodistribution, metabolism, excretion and pilot brain uptake data will be collected and human dosimetry will be calculated from participants scanned at Penn who have whole body scans. PET scans will be collected to evaluate image quality and collect preliminary information on brain uptake of 18F-JSS20-183A in the disease cohorts and healthy controls. The safety of 18F-JSS20-183A will also be evaluated in all participants. Some participants (usually those with positive 18F-JSS20-183A PET scan) may also be asked to have an amyloid-beta (Aβ) PET scan or a blood draw to measure pTau to investigate specificity of 18F-JSS20-183A.
- Conditions
- Tauopathies
- Being tested
- 18F-JSS20-183A PET, Brain MRI, Amyloid PET, Neurological Assessments
- Keywords
- Positron Emission Tomography (PET), Brain MRI, Parkinsons Disease (PD), Alzheimers Disease (AD), Progressive Supranuclear Palsy (PSP), Corticobasal Syndrome (CBS), Genetic Frontotemporal Lobar Degeneration (Genetic FTLD)
- Medical subject headings
- Tauopathies, Parkinson Disease, Alzheimer Disease, Supranuclear Palsy, Progressive, Corticobasal Degeneration
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
18F-JSS20-183A PETDrug
2 hour Positron Emission Tomography (PET) scan using new radiotracer 18F-JSS20-183A.
Brain MRIDiagnostic test
MRI scan of the brain.
Amyloid PETDiagnostic test
PET scan with Florbetaben F18 or 11C-PiB.
Neurological AssessmentsBehavioural
Neurological assessments, including a video interview.
| Study group | Role | What they receive |
|---|---|---|
| 18F-JSS20-183A PET | Experimental | Participants will undergo 18F-JSS20-183A PET scan, they may also have a brain MRI and Amyloid PET scan as well as neurological assessments. Receives: Drug: 18F-JSS20-183A PET; Diagnostic Test: Brain MRI; Diagnostic Test: Amyloid PET; Behavioral: Neurological Assessments |
What is being measured
The primary outcome is the main question the study is designed to answer.
Organ Biodistribution or Dosimetry
Determine biodistribution of the radioactive investigational drug, 18F-JSS20-183A and calculate human dosimetry. A second IV or an arterial line may be placed in the arm contralateral to the side of injection for blood metabolite analysis and/or radioactive counts at various times during the scanning session. Biodistribution, metabolism, excretion and pilot brain uptake data will be collected and human dosimetry will be calculated.
Measured: 4 weeks
PET Uptake of Tracer
Determine whether there is selective uptake of 18F-JSS20-183A in people with taupathies compared to healthy volunteers and non-tau depositing neurodegenerative disease.
Measured: 4 weeks
Secondary outcomes (1)
Adverse Events
Adverse events will be collected.
Measured: 4 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Apr 2025
- Study start9 May 2025
- Primary completionApr 2030 (estimated)
- Study completionApr 2030 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for TauopathiesStudies of the same condition, open and under way.
- More trials run by University of PennsylvaniaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Early Phase 1
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 90 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University of Pennsylvania
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06932809
- Sponsor's protocol ID
- 857138
- Status last verified
- Dec 2025
- First submitted
- 10 Apr 2025
- Last updated
- 23 Dec 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: Early safety assessments including whole body dosimetry studies at Penn; coordinate patient selection criteria, centrally collect and serve all imaging and demographic data, coordinate tracer kinetic methods development and validation for human imaging, and coordinate all data to efficiently enable GO-NOGO decisions for candidate radiotracers. As a final check on diagnosis and specificity of candidate radiotracers, Investigators will request all patient participants to permit postmortem brain donation for autoradiography of relevant radiotracers on fresh frozen brain tissues. Additionally, this Core will interact with multiple ongoing studies with cohorts studying PD, MSA, PSP and FTD. Finally, a robust data sharing plan facilitates collaboration and use of support documents and imaging data.
Study at a glance
From the registry record, last updated by the sponsor on 23 Dec 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Center Without Walls for Imaging Proteinopathies With PET (CW2IP2): Phase I Pilot Study of Biodistribution, Metabolism, Excretion and Brain Uptake of 18F-JSS20-183A
- ClinicalTrials.gov ID
- NCT06932809
- Acronym / sponsor ID
- 857138
- Conditions
- Tauopathies
- Keywords
- Positron Emission Tomography (PET), Brain MRI, Parkinsons Disease (PD), Alzheimers Disease (AD), Progressive Supranuclear Palsy (PSP), Corticobasal Syndrome (CBS), Genetic Frontotemporal Lobar Degeneration (Genetic FTLD)
- Phase
- Early Phase 1
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 90 participants (estimated)
- Lead sponsor
- University of PennsylvaniaUniversity, hospital or other
- Study start
- 9 May 2025 (actual)
- Primary completion
- Apr 2030 (estimated)
- Study completion
- Apr 2030 (estimated)
- First posted
- 17 Apr 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The current protocol is to determine the biodistribution, metabolism, excretion and brain uptake of 18F-JSS20-183A. The goal of this radiotracer is to quantify 4Repeat Tau (4Rtau) protein that is abnormally deposited in the brain of people with a class of neurodegenerative diseases called tauopathies, such as Progressive Supranuclear Palsy (PSP), Corticobasal Syndrome (CBS), syndromes of genetic Frontotemporal Lobar Degeneration (genetic FTLD) as well as participants with Parkinson disease (PD), Alzheimer's Disease (AD) and healthy controls. This multicenter project funded by an NIH U19 grant, is centered at U Pennsylvania (Penn, Grant PI: Robert Mach) in collaboration with U Pittsburgh (Pitt), Yale U, U of California at San Francisco (UCSF) and Washington University in St. Louis (WUSTL). The University of Pennsylvania will act as the sIRB for this multi-center human subjects project and participants will be recruited from all sites.
Detailed description
The current protocol is to determine the biodistribution, metabolism, excretion and brain uptake of 18F-JSS20-183A. The goal of this radiotracer is to quantify 4Repeat Tau (4Rtau) protein that is abnormally deposited in the brain of people with a class of neurodegenerative diseases called tauopathies, such as Progressive Supranuclear Palsy (PSP), Corticobasal Syndrome (CBS), syndromes of genetic Frontotemporal Lobar Degeneration (genetic FTLD) as well as participants with Parkinson disease (PD), Alzheimer's Disease (AD) and healthy controls. This multicenter project funded by an NIH U19 grant, is centered at U Pennsylvania (Penn, Grant PI: Robert Mach) in collaboration with U Pittsburgh (Pitt), Yale U, U of California at San Francisco (UCSF) and Washington University in St. Louis (WUSTL). The University of Pennsylvania will act as the sIRB for this multi-center human subjects project and participants will be recruited from all sites.
Participating clinical sites will recruit up to 90 subjects total; up to 20 people with PSP, 10 with CBS, 15 with genetic FTLD, 10 with AD, 10 with PD and 25 healthy controls across sites with all participants ranging from 40-85 years old. We will encourage equal participation of males and females.
This protocol will include up to 90 evaluable participants across all centers (Penn, Yale, UCSF, WUSTL, Pitt), the whole-body biodistribution analysis will be done at Penn. Investigators anticipate enrollment of up to 15-20 participants at each clinical site, who will undergo up to 120-minutes of dynamic PET/CT scan over the brain, or brain and body if scanned on a long axial-field-of-view scanner, starting approximately at the same time as the injection of radiotracer. A second IV or an arterial line may be placed, preferably in the arm contralateral to the side of injection, for blood metabolite analysis and/or radioactive counts at various times during the scanning session. These blood sample collections can be omitted at the discretion of the investigator. For participants at Penn that may be part of BioD analysis, urine may be collected at the end of the scan session. Participants may also undergo a research brain MRI that may be on the same or a separate day from the PET.
PET imaging sessions will include an injection of ≤ 8 mCi (approximate range for most studies is anticipated to be 3-8 mCi at sites with a standard PET scanner or a lower dose may be used at sites with a high sensitivity scanner) of 18F-JSS20-183A. Biodistribution, metabolism, excretion and pilot brain uptake data will be collected and human dosimetry will be calculated from participants scanned at Penn who have whole body scans. PET scans will be collected to evaluate image quality and collect preliminary information on brain uptake of 18F-JSS20-183A in the disease cohorts and healthy controls. The safety of 18F-JSS20-183A will also be evaluated in all participants. Some participants (usually those with positive 18F-JSS20-183A PET scan) may also be asked to have an amyloid-beta (Aβ) PET scan or a blood draw to measure pTau to investigate specificity of 18F-JSS20-183A.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| 18F-JSS20-183A PET | Experimental | Drug: 18F-JSS20-183A PET, Diagnostic Test: Brain MRI, Diagnostic Test: Amyloid PET, Behavioral: Neurological AssessmentsParticipants will undergo 18F-JSS20-183A PET scan, they may also have a brain MRI and Amyloid PET scan as well as neurological assessments. |
Who may qualify
- Ages
- 40 to 85 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Patients in all cohorts will be male or female adults from 40 to 85 years of age.
- Participants must be informed of the investigational nature of this study and be willing to provide written informed consent and participate in this study in accordance with institutional and federal guidelines prior to study-specific procedures or Participants who are deemed unable to provide informed consent must have a designated study partner present for consent and to accompany them to study visits.
- Investigators will ask disease cohort participants to agree to brain donation, but this choice is not mandatory for participation in this study.
- Diagnosis-specific inclusion criteria: Clinical diagnoses will be determined by consensus committee (except AD and HC cohorts) for diagnostic agreement using video exams of each participant that are stored at WashU in a secured video repository with view-only access exclusively by secured virtual private network (VPN) connection. Video exam and screening assessments for PSP, CBS, MSA, PD, and FTLD may not be required to be repeated if they have been done within 6 months of enrollment, unless requested at the discretion of an investigator to document changes in clinical progression. A consensus committee will not be required to be repeated for participants who have already had a consensus committee diagnosis documented.
Key exclusion criteria (6 listed)
- Females who are pregnant or breast feeding will be excluded, a urine pregnancy test will be performed in women of child-bearing potential prior to injection of 18F-JSS20-183A 11C-PiB or 18F-Florbetaben
- Forms of parkinsonism other than PSP-RS, and PD as defined above
- History of significant or ongoing alcohol abuse or substance abuse or dependence based on medical record review or self-reported
- Contraindications or inability to tolerate imaging, arterial line or IV placement or blood draw procedures in the opinion of an investigator or treating physician
- Contraindication to MRI, such as non-compatible implanted medical device
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| 18F-JSS20-183A PET2 hour Positron Emission Tomography (PET) scan using new radiotracer 18F-JSS20-183A. | Drug | 18F-JSS20-183A PET |
| Brain MRIMRI scan of the brain. | Diagnostic test | 18F-JSS20-183A PET |
| Amyloid PETPET scan with Florbetaben F18 or 11C-PiB. | Diagnostic test | 18F-JSS20-183A PET |
| Neurological AssessmentsNeurological assessments, including a video interview. | Behavioural | 18F-JSS20-183A PET |
Primary outcome
Organ Biodistribution or Dosimetry
Time frame: 4 weeks
Determine biodistribution of the radioactive investigational drug, 18F-JSS20-183A and calculate human dosimetry. A second IV or an arterial line may be placed in the arm contralateral to the side of injection for blood metabolite analysis and/or radioactive counts at various times during the scanning session. Biodistribution, metabolism, excretion and pilot brain uptake data will be collected and human dosimetry will be calculated.
PET Uptake of Tracer
Time frame: 4 weeks
Determine whether there is selective uptake of 18F-JSS20-183A in people with taupathies compared to healthy volunteers and non-tau depositing neurodegenerative disease.
1 secondary outcome
Adverse Events
Time frame: 4 weeks
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 23 Dec 2025.
- Individual participant dataSharing planned: Yes. Early safety assessments including whole body dosimetry studies at Penn; coordinate patient selection criteria, centrally collect and serve all imaging and demographic data, coordinate tracer kinetic methods development and validation for human imaging, and coordinate all data to efficiently enable GO-NOGO decisions for candidate radiotracers. As a final check on diagnosis and specificity of candidate radiotracers, Investigators will request all patient participants to permit postmortem brain donation for autoradiography of relevant radiotracers on fresh frozen brain tissues. Additionally, this Core will interact with multiple ongoing studies with cohorts studying PD, MSA, PSP and FTD. Finally, a robust data sharing plan facilitates collaboration and use of support documents and imaging data.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Early Phase 1 study testing 18F-JSS20-183A PET, Brain MRI and Amyloid PET in people with Tauopathies, run by University of Pennsylvania at 2 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 23 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Early Phase 1 (sometimes called Phase 0) studies give a very small amount of a treatment to a few people, mainly to see how the body handles it.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Each site lists its own contact: choose the nearest one under Trial locations. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Organ Biodistribution or Dosimetry (time frame: 4 weeks). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 Dec 2025.