Lewy Body Dementia (LBD)Phase 2NCT04786223
Targeting Neuroinflammation as a Contributing Pathology in Alzheimer's Disease Dementia and Related Dementias
A Phase 2 study testing C-11 ER-176 and Blood Test in people with Lewy Body Dementia (LBD) and Alzheimer Dementia (AD), run by Val Lowe at 1 site in United States.
Trial summary
This study is being done to research the usefulness of PET/CT imaging for measuring brain inflammation and its relation to Alzheimer's Disease Dementia and related dementias. Additionally, researchers are looking to learn more about the side effects of a new radioactive tracer (radiotracer) C-11 ER176. Read more about this study
- Who is it for?
- Ages 60 years and olderHealthy volunteers can take part
- Conditions the study is for
- Lewy Body Dementia (LBD), Alzheimer Dementia (AD)
- What is being tested?
- C-11 ER-176 and Blood Test
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 125 participants
- Where
- 1 siteUnited States
- Study dates
- 30 Mar 2021to Mar 2030
- Phase
- Phase 2
- 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 60 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Males or females 60 years of age or older.
- Meet the requirements for one of the five groups (CU A-, CU A+, MCI A+, AD A+, MCI-LB or DLB).
- Neurologic evaluation procedures with testing in the MCSA, ADRC, Longitudinal Imaging Biomarkers of Prodromal and Overt DLB studies or Mayo Clinic Behavioral Neurology Practice. Must have had or plan to have at least 2 testing sessions.
- All participants must have or plan to have an amyloid PiB PET scan and MRI brain scan within approximately 6 months of the first ER176 PET/CT scan. Participants undergoing an optional additional ER176 scan are preferred, but not required, to have or plan to have an amyloid PiB PET scan and MRI brain scan within approximately 6 months of the second ER176 PET/CT scan.
- Capacity to sign consent or have a legally authorized representative to sign the consent.
Who cannot join
- Participants unable to lie down without moving for 20 minutes.
- Women who are pregnant or cannot stop breast feeding for 24 hours.
- Actively taking daily anti-inflammatory medications (NSAIDs, corticosteroids, etc.) except for a small control group.
- Generalized inflammatory condition and treatment with immunosuppressive, corticoid/glucocorticoid, steroidal or non-steroidal anti-inflammatory medication within 2 weeks of scanning (only acute medication use as an exclusion so as to limit medication interaction but preserve possible chronic systemic inflammation interaction).
- Standard safety exclusionary criteria for MRI such as metallic foreign bodies, pacemaker, etc., since the quantitative PET data analysis is based on anatomic criteria that are established uniquely for each subject by registration to his/her MRI.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site
Mayo Clinic in Rochester
Rochester, Minnesota, 55905
About this study
This study is being done to research the usefulness of PET/CT imaging for measuring brain inflammation and its relation to Alzheimer's Disease Dementia and related dementias. Additionally, researchers are looking to learn more about the side effects of a new radioactive tracer (radiotracer) C-11 ER176.
Read the detailed description
Alzheimer's disease (AD) dementia is a devastating illness with no cure. Treatments targeting known pathologic hallmarks of AD, such as amyloid-beta (AB), in symptomatic individuals have proved largely fruitless so other potential disease targets warrant exploration. Neuroinflammation has interesting possible associations with AD dementia and may contribute to AD dementia in different ways among different individuals. Previous PET neuroinflammation data are not entirely consistent and new methods of PET imaging and studies with larger cohorts are needed to further investigate the role of neuroinflammation in AD dementia and the utility of PET as a biomarker. This project seeks to test new PET neuroinflammation imaging methods in unimpaired, mildly impaired, AD dementia, and mild cognitively impaired and dementia with Lewy bodies (DLB) individuals with biomarker-identified brain pathology to help address these gaps in knowledge in the field.
- Conditions
- Lewy Body Dementia (LBD), Alzheimer Dementia (AD)
- Being tested
- C-11 ER-176, Blood Test
- Keywords
- ER176, Neuroinflammation
- Medical subject headings
- Lewy Body Disease, Alzheimer Disease, Neuroinflammatory Diseases
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
C-11 ER-176Drug
Participants will receive a one-time administration of C-11 ER176 and undergo a PET/CT imaging study. Participants may be invited to return for an additional administration of C-11 ER176 and undergo an additional PET/CT imaging study.
Blood TestDiagnostic test
Participants will undergo a one time venipuncture blood collection to evaluate the presence of inflammatory and genetic markers.
| Study group | Role | What they receive |
|---|---|---|
| C-11 ER176 PET/CT | Other | C-11 ER176 is an investigational radiopharmaceutical that will be produced under cGMP in the Mayo Clinic Cyclotron Facility. The imaging agent (C-11 ER176) will be administered on an outpatient basis. It will be administered at a single time IV prior to the PET imaging. Receives: Drug: C-11 ER-176; Diagnostic Test: Blood Test |
What is being measured
The primary outcome is the main question the study is designed to answer.
Determine if neuroinflammation, as measured by C-11 ER176 SUVr and inflammatory blood test measurements, is correlated with an increase in AB plaque, as measured by C-11 PiB SUVr.
Rationale: Biomarkers that are surrogates of AD pathology are needed to provide methods to select appropriate treatment strategies. We hypothesize that increased neuroinflammation PET signal is seen in AD A+ and MCI A+ as compared to CU A+ participants and is also increased in CU A+ vs. CU A- participants. We note that similar patterns may also be observed in other neurodegenerative diseases such as DLB, particularly in cases with mixed AD pathology.
Measured: 4 years
Determine if neuroinflammation, as measured by C-11 ER176 SUVr, is correlated with a history of increased cognitive decline in the 5 years preceding PET imaging, as measured by z scores from neuropsychiatric test results (memory, etc.).
Rationale: Surrogate biomarkers of AD pathology, beyond amyloid and tau, are needed to better assess disease progression and prognosis in AD dementia patients, as well as in DLB patients. We hypothesize that increased ER176 PET signal in amyloid positive participants is associated with the rate of cognitive decline preceding the neuroinflammation PET scan.
Measured: 4 years
Determine if neuroinflammation, as measured by PET imaging, is associated with blood and/or CSF biomarkers of inflammation or other neurologic diseases and related blood tests.
Rationale: Plasma biomarkers are advantageous over imaging and CSF biomarkers with regards to cost, invasiveness, and feasibility in community settings. However, they may be less specific. We need to determine how blood and/or CSF biomarkers correlate with PET neuroinflammation imaging as markers of disease progression, which markers are most highly correlated, and which may be specific to AD pathology. We hypothesize that plasma biomarkers of inflammation and other neurologic diseases and related blood tests (cytokines, TSPO, amyloid and tau) will correlate with increased PET neuroinflammation imaging signal.
Measured: 4 years
Secondary outcomes (1)
Incidence of adverse events attributable to ER176.
Adverse events related to ER176 will be evaluated according to the Common Terminology Criteria for Adverse Events (CTCAE 5.0)
Measured: 4 year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Mar 2021
- Study start30 Mar 2021
- Primary completionMar 2029 (estimated)
- Study completionMar 2030 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Lewy Body Dementia (LBD)Studies of the same condition, open and under way.
- 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
- Phase 2
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- Alzheimer's Disease Dementia, dementia with Lewy bodies
- Masking
- None (open label)
- Enrolment
- 125 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Val Lowe
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Val Lowe, Mayo Clinic
- Investigators
- Val Lowe, MD, Principal investigator, Mayo Clinic
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04786223
- Sponsor's protocol ID
- 20-000866
- Status last verified
- May 2026
- First submitted
- 18 Feb 2021
- Last updated
- 22 May 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 22 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Targeting Neuroinflammation as a Contributing Pathology in Alzheimer's Disease Dementia and Related Dementias
- ClinicalTrials.gov ID
- NCT04786223
- Acronym / sponsor ID
- 20-000866
- Conditions
- Lewy Body Dementia (LBD), Alzheimer Dementia (AD)
- Keywords
- ER176, Neuroinflammation
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Enrolling by invitation
- Enrolment
- 125 participants (estimated)
- Lead sponsor
- Val LoweUniversity, hospital or other
- Study start
- 30 Mar 2021 (actual)
- Primary completion
- Mar 2029 (estimated)
- Study completion
- Mar 2030 (estimated)
- First posted
- 8 Mar 2021 (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.
This study is being done to research the usefulness of PET/CT imaging for measuring brain inflammation and its relation to Alzheimer's Disease Dementia and related dementias. Additionally, researchers are looking to learn more about the side effects of a new radioactive tracer (radiotracer) C-11 ER176.
Detailed description
Alzheimer's disease (AD) dementia is a devastating illness with no cure. Treatments targeting known pathologic hallmarks of AD, such as amyloid-beta (AB), in symptomatic individuals have proved largely fruitless so other potential disease targets warrant exploration. Neuroinflammation has interesting possible associations with AD dementia and may contribute to AD dementia in different ways among different individuals. Previous PET neuroinflammation data are not entirely consistent and new methods of PET imaging and studies with larger cohorts are needed to further investigate the role of neuroinflammation in AD dementia and the utility of PET as a biomarker. This project seeks to test new PET neuroinflammation imaging methods in unimpaired, mildly impaired, AD dementia, and mild cognitively impaired and dementia with Lewy bodies (DLB) individuals with biomarker-identified brain pathology to help address these gaps in knowledge in the field.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- Alzheimer's Disease Dementia, dementia with Lewy bodies
| Arm | Type | Receives |
|---|---|---|
| C-11 ER176 PET/CT | Other | Drug: C-11 ER-176, Diagnostic Test: Blood TestC-11 ER176 is an investigational radiopharmaceutical that will be produced under cGMP in the Mayo Clinic Cyclotron Facility. The imaging agent (C-11 ER176) will be administered on an outpatient basis. It will be administered at a single time IV prior to the PET imaging. |
Who may qualify
- Ages
- 60 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Males or females 60 years of age or older.
- Meet the requirements for one of the five groups (CU A-, CU A+, MCI A+, AD A+, MCI-LB or DLB).
- Neurologic evaluation procedures with testing in the MCSA, ADRC, Longitudinal Imaging Biomarkers of Prodromal and Overt DLB studies or Mayo Clinic Behavioral Neurology Practice. Must have had or plan to have at least 2 testing sessions.
- All participants must have or plan to have an amyloid PiB PET scan and MRI brain scan within approximately 6 months of the first ER176 PET/CT scan. Participants undergoing an optional additional ER176 scan are preferred, but not required, to have or plan to have an amyloid PiB PET scan and MRI brain scan within approximately 6 months of the second ER176 PET/CT scan.
- Capacity to sign consent or have a legally authorized representative to sign the consent.
Key exclusion criteria (5 listed)
- Participants unable to lie down without moving for 20 minutes.
- Women who are pregnant or cannot stop breast feeding for 24 hours.
- Actively taking daily anti-inflammatory medications (NSAIDs, corticosteroids, etc.) except for a small control group.
- Generalized inflammatory condition and treatment with immunosuppressive, corticoid/glucocorticoid, steroidal or non-steroidal anti-inflammatory medication within 2 weeks of scanning (only acute medication use as an exclusion so as to limit medication interaction but preserve possible chronic systemic inflammation interaction).
- Standard safety exclusionary criteria for MRI such as metallic foreign bodies, pacemaker, etc., since the quantitative PET data analysis is based on anatomic criteria that are established uniquely for each subject by registration to his/her MRI.
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 |
|---|---|---|
| C-11 ER-176Participants will receive a one-time administration of C-11 ER176 and undergo a PET/CT imaging study. Participants may be invited to return for an additional administration of C-11 ER176 and undergo an additional PET/CT imaging study. | Drug | C-11 ER176 PET/CT |
| Blood TestParticipants will undergo a one time venipuncture blood collection to evaluate the presence of inflammatory and genetic markers. | Diagnostic test | C-11 ER176 PET/CT |
Primary outcome
Determine if neuroinflammation, as measured by C-11 ER176 SUVr and inflammatory blood test measurements, is correlated with an increase in AB plaque, as measured by C-11 PiB SUVr.
Time frame: 4 years
Rationale: Biomarkers that are surrogates of AD pathology are needed to provide methods to select appropriate treatment strategies. We hypothesize that increased neuroinflammation PET signal is seen in AD A+ and MCI A+ as compared to CU A+ participants and is also increased in CU A+ vs. CU A- participants. We note that similar patterns may also be observed in other neurodegenerative diseases such as DLB, particularly in cases with mixed AD pathology.
Determine if neuroinflammation, as measured by C-11 ER176 SUVr, is correlated with a history of increased cognitive decline in the 5 years preceding PET imaging, as measured by z scores from neuropsychiatric test results (memory, etc.).
Time frame: 4 years
Rationale: Surrogate biomarkers of AD pathology, beyond amyloid and tau, are needed to better assess disease progression and prognosis in AD dementia patients, as well as in DLB patients. We hypothesize that increased ER176 PET signal in amyloid positive participants is associated with the rate of cognitive decline preceding the neuroinflammation PET scan.
Determine if neuroinflammation, as measured by PET imaging, is associated with blood and/or CSF biomarkers of inflammation or other neurologic diseases and related blood tests.
Time frame: 4 years
Rationale: Plasma biomarkers are advantageous over imaging and CSF biomarkers with regards to cost, invasiveness, and feasibility in community settings. However, they may be less specific. We need to determine how blood and/or CSF biomarkers correlate with PET neuroinflammation imaging as markers of disease progression, which markers are most highly correlated, and which may be specific to AD pathology. We hypothesize that plasma biomarkers of inflammation and other neurologic diseases and related blood tests (cytokines, TSPO, amyloid and tau) will correlate with increased PET neuroinflammation imaging signal.
1 secondary outcome
Incidence of adverse events attributable to ER176.
Time frame: 4 year
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 22 May 2026.
- Mayo Clinic Clinical TrialsLink provided by the sponsor.
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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.
Val Lowe, MD principal investigator
Mayo Clinic
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing C-11 ER-176 and Blood Test in people with Lewy Body Dementia (LBD) and Alzheimer Dementia (AD), run by Val Lowe at 1 site 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 5 inclusion and 5 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: enrolling by invitation, as of the sponsor's last update on 22 May 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site 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?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
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?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Determine if neuroinflammation, as measured by C-11 ER176 SUVr and inflammatory blood test measurements, is correlated with an increase in AB plaque, as measured by C-11 PiB SUVr. (time frame: 4 years). The study lists 3 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 22 May 2026.