Trial Outcomes & Findings for 11C-Acetate PET/CT Imaging As a Biomarker of Amyloid-Induced Neuroinflammation (NCT NCT02811744)
NCT ID: NCT02811744
Last Updated: 2024-01-11
Results Overview
We compare the whole brain 11C-acetate uptake standardized uptake value ratio (SUVR) between the amnestic MCI and control cohorts. Static summed images from 40-60 minutes after tracer injection were generated from raw dynamic PET data. This timeframe was selected to preferentially capture 11C-acetate trapped in biosynthetic pathways in activated astrocytes, rather than what was catabolized to 11C-CO2 .Mean tracer binding, expressed as standardized uptake values (SUV) in the whole cerebral cortex and other regions is measured from these summed images using PMOD software (PMOD technologies). SUVR is generated by dividing the mean whole cortex SUV by the mean cerebellar gray matter SUV; SUVR is a unitless measure. For this tracer, higher values are worse, indicating more astrocyte activation and inflammation.
TERMINATED
PHASE2
11 participants
6 months
2024-01-11
Participant Flow
6 MCI subjects and 5 Healthy Controls recruited from neurology practice at University of Pennsylvania
11 subjects were enrolled. Target enrollment of 20 was not met due to difficulty with recruitment.
Participant milestones
| Measure |
Amnestic MCI Cohort
Patients with Mild Cognitive Impairment (MCI) (up to 14) will be recruited primarily from the Penn Memory Center (PMC). Clinical diagnostic criteria (described in further detail in Study Procedures section) will be used to identify subjects who are meet criteria for amnestic MCI. Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
11C-acetate: Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
|
Control Cohort
Normal control subjects in the same age range (up to 6) will be recruited from a current ongoing study investigating neuroinflammation in late life depression and healthy controls, from the control group in which all subjects receive MRI and LP and from the PMC research cohort. Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
11C-acetate: Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
|
|---|---|---|
|
Overall Study
STARTED
|
6
|
5
|
|
Overall Study
COMPLETED
|
6
|
5
|
|
Overall Study
NOT COMPLETED
|
0
|
0
|
Reasons for withdrawal
Withdrawal data not reported
Baseline Characteristics
11C-Acetate PET/CT Imaging As a Biomarker of Amyloid-Induced Neuroinflammation
Baseline characteristics by cohort
| Measure |
Amnestic MCI Cohort
n=6 Participants
Patients with Mild Cognitive Impairment (MCI) (up to 14) will be recruited primarily from the Penn Memory Center (PMC). Clinical diagnostic criteria (described in further detail in Study Procedures section) will be used to identify subjects who are meet criteria for amnestic MCI. Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
11C-acetate: Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
|
Control Cohort
n=5 Participants
Normal control subjects in the same age range (up to 6) will be recruited from a current ongoing study investigating neuroinflammation in late life depression and healthy controls, from the control group in which all subjects receive MRI and LP and from the PMC research cohort. Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
11C-acetate: Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
|
Total
n=11 Participants
Total of all reporting groups
|
|---|---|---|---|
|
Age, Categorical
<=18 years
|
0 Participants
n=99 Participants
|
0 Participants
n=107 Participants
|
0 Participants
n=206 Participants
|
|
Age, Categorical
Between 18 and 65 years
|
0 Participants
n=99 Participants
|
0 Participants
n=107 Participants
|
0 Participants
n=206 Participants
|
|
Age, Categorical
>=65 years
|
6 Participants
n=99 Participants
|
5 Participants
n=107 Participants
|
11 Participants
n=206 Participants
|
|
Sex: Female, Male
Female
|
4 Participants
n=99 Participants
|
2 Participants
n=107 Participants
|
6 Participants
n=206 Participants
|
|
Sex: Female, Male
Male
|
2 Participants
n=99 Participants
|
3 Participants
n=107 Participants
|
5 Participants
n=206 Participants
|
|
Race (NIH/OMB)
American Indian or Alaska Native
|
0 Participants
n=99 Participants
|
0 Participants
n=107 Participants
|
0 Participants
n=206 Participants
|
|
Race (NIH/OMB)
Asian
|
0 Participants
n=99 Participants
|
0 Participants
n=107 Participants
|
0 Participants
n=206 Participants
|
|
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
|
0 Participants
n=99 Participants
|
0 Participants
n=107 Participants
|
0 Participants
n=206 Participants
|
|
Race (NIH/OMB)
Black or African American
|
1 Participants
n=99 Participants
|
1 Participants
n=107 Participants
|
2 Participants
n=206 Participants
|
|
Race (NIH/OMB)
White
|
5 Participants
n=99 Participants
|
3 Participants
n=107 Participants
|
8 Participants
n=206 Participants
|
|
Race (NIH/OMB)
More than one race
|
0 Participants
n=99 Participants
|
1 Participants
n=107 Participants
|
1 Participants
n=206 Participants
|
|
Race (NIH/OMB)
Unknown or Not Reported
|
0 Participants
n=99 Participants
|
0 Participants
n=107 Participants
|
0 Participants
n=206 Participants
|
PRIMARY outcome
Timeframe: 6 monthsPopulation: There were six participants with MCI and 2 controls
We compare the whole brain 11C-acetate uptake standardized uptake value ratio (SUVR) between the amnestic MCI and control cohorts. Static summed images from 40-60 minutes after tracer injection were generated from raw dynamic PET data. This timeframe was selected to preferentially capture 11C-acetate trapped in biosynthetic pathways in activated astrocytes, rather than what was catabolized to 11C-CO2 .Mean tracer binding, expressed as standardized uptake values (SUV) in the whole cerebral cortex and other regions is measured from these summed images using PMOD software (PMOD technologies). SUVR is generated by dividing the mean whole cortex SUV by the mean cerebellar gray matter SUV; SUVR is a unitless measure. For this tracer, higher values are worse, indicating more astrocyte activation and inflammation.
Outcome measures
| Measure |
Amnestic MCI Cohort
n=6 Participants
Patients with Mild Cognitive Impairment (MCI) (up to 14) will be recruited primarily from the Penn Memory Center (PMC). Clinical diagnostic criteria (described in further detail in Study Procedures section) will be used to identify subjects who are meet criteria for amnestic MCI. Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
11C-acetate: Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
|
Control Cohort
n=2 Participants
Normal control subjects in the same age range (up to 6) will be recruited from a current ongoing study investigating neuroinflammation in late life depression and healthy controls, from the control group in which all subjects receive MRI and LP and from the PMC research cohort. Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
11C-acetate: Participants will receive injection of radioactive tracer 11C-acetate and complete a PET/CT scan.
|
|---|---|---|
|
11C-acetate Uptake in Amyloid Positive Mild Cognitive Impairment (MCI) Subjects Versus Amyloid Negative Healthy Controls
|
1.04 Standardized uptake value ratio (SUVR)
Standard Deviation 0.06
|
1.04 Standardized uptake value ratio (SUVR)
Standard Deviation 0.05
|
Adverse Events
Amnestic MCI Cohort
Control Cohort
Serious adverse events
Adverse event data not reported
Other adverse events
Adverse event data not reported
Additional Information
Results disclosure agreements
- Principal investigator is a sponsor employee
- Publication restrictions are in place