Gregory S Day1, Brian A Gordon2, Richard J Perrin2, Nigel J Cairns2, Helen Beaumont2, Katherine Schwetye2, Cole Ferguson2, Namita Sinha2, Robert Bucelli2, Erik S Musiek2, Nupur Ghoshal2, Maria R Ponisio2, Benjamin Vincent2, Shruti Mishra2, Kelley Jackson2, John C Morris2, Tammie L S Benzinger2, Beau M Ances2. 1. From The Charles F. and Joanne Knight Alzheimer Disease Research Center (G.S.D., B.A.G., R.J.P., N.J.C., H.B., E.S.M., N.G., J.C.M., T.L.S.B., B.M.A.), Department of Neurology (G.S.D., R.B., E.S.M., N.G., J.C.M., B.M.A.), Mallinckrodt Institute of Radiology (B.A.G., H.B., M.R.P., B.V., S.M., K.J., T.L.S.B., B.M.A.), and Department of Pathology (R.J.P., N.J.C., K.S., C.F., N.S., J.C.M.), Washington University School of Medicine (G.S.D., B.A.G., R.J.P., N.J.C., H.B., K.S., C.F., N.S., R.B., E.S.M., N.G., M.R.P., B.V., S.M., K.J., J.C.M., T.L.S.B., B.M.A.), St. Louis, MO. gday@wustl.edu. 2. From The Charles F. and Joanne Knight Alzheimer Disease Research Center (G.S.D., B.A.G., R.J.P., N.J.C., H.B., E.S.M., N.G., J.C.M., T.L.S.B., B.M.A.), Department of Neurology (G.S.D., R.B., E.S.M., N.G., J.C.M., B.M.A.), Mallinckrodt Institute of Radiology (B.A.G., H.B., M.R.P., B.V., S.M., K.J., T.L.S.B., B.M.A.), and Department of Pathology (R.J.P., N.J.C., K.S., C.F., N.S., J.C.M.), Washington University School of Medicine (G.S.D., B.A.G., R.J.P., N.J.C., H.B., K.S., C.F., N.S., R.B., E.S.M., N.G., M.R.P., B.V., S.M., K.J., J.C.M., T.L.S.B., B.M.A.), St. Louis, MO.
Abstract
OBJECTIVE: To determine whether specific patterns of [18F]-AV-1451 tau-PET retention are observed in patients with autopsy-proven sporadic Creutzfeldt-Jakob disease (CJD). METHODS: In vivo [18F]-AV-1451 PET neuroimaging was performed in 5 patients with sporadic CJD (median age, 66 years [63-74]), and results were compared to cognitively normal (CN) persons (n = 44; median age, 68 years [63-74]) and to participants with very mild Alzheimer disease (AD) dementia (n = 8; median age, 77 years [63-90]). Autopsy was completed in all patients with CJD, confirming the clinical diagnosis and permitting characterization of AD neuropathologic change (ADNC). RESULTS: All patients with CJD presented with rapidly progressive dementia, typical magnetic resonance brain imaging changes, and elevated CSF total tau (median = 6,519; range = 1,528-13,240 pg/mL). Death occurred within 9 months of symptom onset, with a median 1 month (0.2-3.3) interval from [18F]-AV-1451 PET to autopsy. No unique pattern of [18F]-AV-1451 retention was observed on visual inspection. Summary standardized uptake value ratios in patients with CJD (1.17, 1.08-1.36) were indistinguishable from CN persons (1.14, 0.84-1.54; p = 0.6), and well below those of participants with AD (2.23, 1.60-3.04; p ≤ 0.01). [18F]-AV-1451 retention in patients with CJD and CN persons was similar in brain areas frequently affected in AD and CJD. Neuropathologic analysis confirmed the clinical diagnosis in all patients with CJD. Four patients with CJD also had low-level ADNC (A1B1C0); one patient had intermediate-level ADNC (A2B2C1/2). CONCLUSION: Increased [18F]-AV-1451 retention was not observed in patients with rapidly progressive dementia due to sporadic CJD. The [18F]-AV-1451 PET tracer maintains good specificity for paired helical tau filaments associated with AD dementia.
OBJECTIVE: To determine whether specific patterns of [18F]-AV-1451 tau-PET retention are observed in patients with autopsy-proven sporadic Creutzfeldt-Jakob disease (CJD). METHODS: In vivo [18F]-AV-1451 PET neuroimaging was performed in 5 patients with sporadic CJD (median age, 66 years [63-74]), and results were compared to cognitively normal (CN) persons (n = 44; median age, 68 years [63-74]) and to participants with very mild Alzheimer disease (AD) dementia (n = 8; median age, 77 years [63-90]). Autopsy was completed in all patients with CJD, confirming the clinical diagnosis and permitting characterization of AD neuropathologic change (ADNC). RESULTS: All patients with CJD presented with rapidly progressive dementia, typical magnetic resonance brain imaging changes, and elevated CSF total tau (median = 6,519; range = 1,528-13,240 pg/mL). Death occurred within 9 months of symptom onset, with a median 1 month (0.2-3.3) interval from [18F]-AV-1451 PET to autopsy. No unique pattern of [18F]-AV-1451 retention was observed on visual inspection. Summary standardized uptake value ratios in patients with CJD (1.17, 1.08-1.36) were indistinguishable from CN persons (1.14, 0.84-1.54; p = 0.6), and well below those of participants with AD (2.23, 1.60-3.04; p ≤ 0.01). [18F]-AV-1451 retention in patients with CJD and CN persons was similar in brain areas frequently affected in AD and CJD. Neuropathologic analysis confirmed the clinical diagnosis in all patients with CJD. Four patients with CJD also had low-level ADNC (A1B1C0); one patient had intermediate-level ADNC (A2B2C1/2). CONCLUSION: Increased [18F]-AV-1451 retention was not observed in patients with rapidly progressive dementia due to sporadic CJD. The [18F]-AV-1451 PET tracer maintains good specificity for paired helical tau filaments associated with AD dementia.
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