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Hutchison RM, Fraser K, Yang M, Fox T, Hirschhorn E, Njingti E, Scott D, Bedell BJ, Kistner KM, Cedarbaum JM, Evans KC, Graham D, Martarello L, Mollenhauer B, Lang AE, Dam T, Beaver J. Cinpanemab in Early Parkinson Disease: Evaluation of Biomarker Results From the Phase 2 SPARK Clinical Trial. Neurology 2024; 102:e209137. [PMID: 38315945 DOI: 10.1212/wnl.0000000000209137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 11/29/2023] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Sensitive, reliable, and scalable biomarkers are needed to accelerate the development of therapies for Parkinson disease (PD). In this study, we evaluate the biomarkers of early PD diagnosis, disease progression, and treatment effect collected in the SPARK. METHODS Cinpanemab is a human-derived monoclonal antibody binding preferentially to aggregated forms of extracellular α-synuclein. SPARK was a randomized, double-blind, placebo-controlled, phase 2 multicenter trial evaluating 3 cinpanemab doses administered intravenously every 4 weeks for 52 weeks with an active treatment dose-blind extension period for up to 112 weeks. SPARK enrolled 357 participants diagnosed with PD within 3 years, aged 40-80 years, ≤2.5 on the modified Hoehn and Yahr scale, and with evidence of striatal dopaminergic deficit. The primary outcome was change from baseline in the Movement Disorder Society-Sponsored Revision of the Unified Parkinson's Disease Rating Scale total score. Secondary and exploratory biomarker outcomes evaluated change from baseline at week 52 relative to placebo. Dopamine transporter SPECT and MRI were used to quantify changes in the nigrostriatal dopamine pathway and regional atrophy. CSF and plasma samples were used to assess change in total α-synuclein levels, α-synuclein seeding, and neurofilament light chain levels. SPARK was conducted from January 2018 to April 2021 and terminated due to lack of efficacy. RESULTS Approximately 3.8% (15/398) of SPECT-imaged participants did not have evidence of dopaminergic deficit and were screen-failed. Binary classification of α-synuclein seeding designated 93% (110/118) of the enrolled CSF subgroup as positive for α-synuclein seeds at baseline. Clinical disease progression was observed, with no statistically significant difference in cinpanemab groups compared with that in placebo. Ninety-nine percent of participants with positive α-synuclein seeding remained positive through week 52. No statistically significant changes from baseline were observed between treatment groups and placebo across biomarker measures. Broadly, there was minimal annual change with high interindividual variability across biomarkers-with striatal binding ratios of the ipsilateral putamen showing the greatest mean change/SD over time. DISCUSSION Biomarker results indicated enrollment of the intended population with early PD, but there was no significant correlation with disease progression or clear evidence of a cinpanemab treatment effect on biomarker measures. Suitable biomarkers for evaluating disease severity and progression in early PD trials are still needed. TRIAL REGISTRATION INFORMATION NCT03318523 (clinicaltrials.gov/ct2/show/NCT03318523); Submitted October 24, 2017; First patient enrolled January 2018.
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Affiliation(s)
- R Matthew Hutchison
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Kyle Fraser
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Minhua Yang
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Tara Fox
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Elizabeth Hirschhorn
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Edwin Njingti
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - David Scott
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Barry J Bedell
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Kristi M Kistner
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Jesse M Cedarbaum
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Karleyton C Evans
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Danielle Graham
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Laurent Martarello
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Brit Mollenhauer
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Anthony E Lang
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - Tien Dam
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
| | - John Beaver
- From Biogen Inc. (R.M.H., K.F., M.Y., E.H., K.C.E., D.G., L.M., J.B.), Cambridge, MA; Biogen Inc. (T.F.), Maidenhead, United Kingdom; Formerly Biogen Inc. at time of study (E.N., J.M.C., T.D.); Clario (D.S.), Princeton, NJ; Biospective Inc. (B.J.B.), Montreal, Quebec, Canada; Nucleus Global (K.M.K.), Atlanta, GA; Coeruleus Clinical Sciences LLC (J.M.C.), Woodbridge, CT; Department of Neurology (B.M.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, and Scientific Employee with an Honorary Contract at German Center for Neurodegenerative Diseases (DZNE), Germany; Morton and Gloria Shulman Movement Disorders Clinic (A.E.L.); and Edmond J. Safra Program in Parkinson's Disease (A.E.L.), Toronto, Ontario, Canada
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Parnianpour P, Benatar M, Briemberg H, Dey A, Dionne A, Dupré N, Evans KC, Frayne R, Genge A, Graham SJ, Korngut L, McLaren DG, Seres P, Welsh RC, Wilman A, Zinman L, Kalra S. Mismatch between clinically defined classification of ALS stage and the burden of cerebral pathology. J Neurol 2024:10.1007/s00415-024-12190-x. [PMID: 38282082 DOI: 10.1007/s00415-024-12190-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/05/2024] [Accepted: 01/10/2024] [Indexed: 01/30/2024]
Abstract
This study aimed to investigate the clinical stratification of amyotrophic lateral sclerosis (ALS) patients in relation to in vivo cerebral degeneration. One hundred forty-nine ALS patients and one hundred forty-four healthy controls (HCs) were recruited from the Canadian ALS Neuroimaging Consortium (CALSNIC). Texture analysis was performed on T1-weighted scans to extract the texture feature "autocorrelation" (autoc), an imaging biomarker of cerebral degeneration. Patients were stratified at baseline into early and advanced disease stages based on criteria adapted from ALS clinical trials and the King's College staging system, as well as into slow and fast progressors (disease progression rates, DPR). Patients had increased autoc in the internal capsule. These changes extended beyond the internal capsule in early-stage patients (clinical trial-based criteria), fast progressors, and in advanced-stage patients (King's staging criteria). Longitudinal increases in autoc were observed in the postcentral gyrus, corticospinal tract, posterior cingulate cortex, and putamen; whereas decreases were observed in corpus callosum, caudate, central opercular cortex, and frontotemporal areas. Both longitudinal increases and decreases of autoc were observed in non-overlapping regions within insula and precentral gyrus. Within-criteria comparisons of autoc revealed more pronounced changes at baseline and longitudinally in early- (clinical trial-based criteria) and advanced-stage (King's staging criteria) patients and fast progressors. In summary, comparative patterns of baseline and longitudinal progression in cerebral degeneration are dependent on sub-group selection criteria, with clinical trial-based stratification insufficiently characterizing disease stage based on pathological cerebral burden.
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Affiliation(s)
- Pedram Parnianpour
- Neuroscience and Mental Health Institute, University of Alberta, 562 Heritage Medical Research Centre, 11313-87 Ave, Edmonton, AB, T6G2S2, Canada.
| | - Michael Benatar
- Department of Neurology, University of Miami Miller School of Medicine, Miami, USA
| | - Hannah Briemberg
- Division of Neurology, University of British Columbia, Vancouver, BC, Canada
| | - Avyarthana Dey
- Neuroscience and Mental Health Institute, University of Alberta, 562 Heritage Medical Research Centre, 11313-87 Ave, Edmonton, AB, T6G2S2, Canada
| | - Annie Dionne
- Axe Neurosciences, CHU de Québec-Université Laval, Québec City, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Nicolas Dupré
- Axe Neurosciences, CHU de Québec-Université Laval, Québec City, QC, Canada
- Department of Medicine, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | | | - Richard Frayne
- Hotchkiss Brain Institute, University of Calgary, Calgary, Canada
| | - Angela Genge
- Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Simon J Graham
- Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Toronto, Canada
| | - Lawrence Korngut
- Hotchkiss Brain Institute, University of Calgary, Calgary, Canada
| | | | - Peter Seres
- Department of Biomedical Engineering, University of Alberta, Edmonton, Canada
| | - Robert C Welsh
- Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - Alan Wilman
- Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, AB, Canada
| | - Lorne Zinman
- Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Toronto, Canada
| | - Sanjay Kalra
- Neuroscience and Mental Health Institute, University of Alberta, 562 Heritage Medical Research Centre, 11313-87 Ave, Edmonton, AB, T6G2S2, Canada
- Department of Biomedical Engineering, University of Alberta, Edmonton, Canada
- Division of Neurology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
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Ben Bashat D, Thaler A, Lerman Shacham H, Even-Sapir E, Hutchison M, Evans KC, Orr-Urterger A, Cedarbaum JM, Droby A, Giladi N, Mirelman A, Artzi M. Neuromelanin and T 2*-MRI for the assessment of genetically at-risk, prodromal, and symptomatic Parkinson's disease. NPJ Parkinsons Dis 2022; 8:139. [PMID: 36271084 PMCID: PMC9586960 DOI: 10.1038/s41531-022-00405-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 09/30/2022] [Indexed: 11/23/2022] Open
Abstract
MRI was suggested as a promising method for the diagnosis and assessment of Parkinson's Disease (PD). We aimed to assess the sensitivity of neuromelanin-MRI and T2* with radiomics analysis for detecting PD, identifying individuals at risk, and evaluating genotype-related differences. Patients with PD and non-manifesting (NM) participants [NM-carriers (NMC) and NM-non-carriers (NMNC)], underwent MRI and DAT-SPECT. Imaging-based metrics included 48 neuromelanin and T2* radiomics features and DAT-SPECT specific-binding-ratios (SBR), were extracted from several brain regions. Imaging values were assessed for their correlations with age, differences between groups, and correlations with the MDS-likelihood-ratio (LR) score. Several machine learning classifiers were evaluated for group classification. A total of 127 participants were included: 46 patients with PD (62.3 ± 10.0 years) [15:LRRK2-PD, 16:GBA-PD, and 15:idiopathic-PD (iPD)], 47 NMC (51.5 ± 8.3 years) [24:LRRK2-NMC and 23:GBA-NMC], and 34 NMNC (53.5 ± 10.6 years). No significant correlations were detected between imaging parameters and age. Thirteen MRI-based parameters and radiomics features demonstrated significant differences between PD and NMNC groups. Support-Vector-Machine (SVM) classifier achieved the highest performance (AUC = 0.77). Significant correlations were detected between LR scores and two radiomic features. The classifier successfully identified two out of three NMC who converted to PD. Genotype-related differences were detected based on radiomic features. SBR values showed high sensitivity in all analyses. In conclusion, neuromelanin and T2* MRI demonstrated differences between groups and can be used for the assessment of individuals at-risk in cases when DAT-SPECT can't be performed. Combining neuromelanin and T2*-MRI provides insights into the pathophysiology underlying PD, and suggests that iron accumulation precedes neuromelanin depletion during the prodromal phase.
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Affiliation(s)
- Dafna Ben Bashat
- grid.413449.f0000 0001 0518 6922Sagol Brain Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Avner Thaler
- grid.12136.370000 0004 1937 0546Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel ,grid.413449.f0000 0001 0518 6922Laboratory of Early Markers Of Neurodegeneration (LEMON), Neurological Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Hedva Lerman Shacham
- grid.413449.f0000 0001 0518 6922Department of Nuclear Medicine, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Einat Even-Sapir
- grid.12136.370000 0004 1937 0546Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel ,grid.413449.f0000 0001 0518 6922Department of Nuclear Medicine, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel
| | | | | | - Avi Orr-Urterger
- grid.12136.370000 0004 1937 0546Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel ,grid.413449.f0000 0001 0518 6922Genomic Research Laboratory for Neurodegeneration, Neurological Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Jesse M. Cedarbaum
- Coeruleus Clinical Sciences LLC, Woodbridge, CT USA ,grid.47100.320000000419368710Yale University School of Medicine, New Haven, CT USA
| | - Amgad Droby
- grid.12136.370000 0004 1937 0546Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel ,grid.413449.f0000 0001 0518 6922Laboratory of Early Markers Of Neurodegeneration (LEMON), Neurological Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Nir Giladi
- grid.12136.370000 0004 1937 0546Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel ,grid.413449.f0000 0001 0518 6922Laboratory of Early Markers Of Neurodegeneration (LEMON), Neurological Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Anat Mirelman
- grid.12136.370000 0004 1937 0546Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel ,grid.413449.f0000 0001 0518 6922Laboratory of Early Markers Of Neurodegeneration (LEMON), Neurological Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Moran Artzi
- grid.413449.f0000 0001 0518 6922Sagol Brain Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel ,grid.12136.370000 0004 1937 0546Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
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Lang AE, Siderowf AD, Macklin EA, Poewe W, Brooks DJ, Fernandez HH, Rascol O, Giladi N, Stocchi F, Tanner CM, Postuma RB, Simon DK, Tolosa E, Mollenhauer B, Cedarbaum JM, Fraser K, Xiao J, Evans KC, Graham DL, Sapir I, Inra J, Hutchison RM, Yang M, Fox T, Budd Haeberlein S, Dam T. Trial of Cinpanemab in Early Parkinson's Disease. N Engl J Med 2022; 387:408-420. [PMID: 35921450 DOI: 10.1056/nejmoa2203395] [Citation(s) in RCA: 103] [Impact Index Per Article: 51.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Aggregated α-synuclein plays an important role in Parkinson's disease pathogenesis. Cinpanemab, a human-derived monoclonal antibody that binds to α-synuclein, is being evaluated as a disease-modifying treatment for Parkinson's disease. METHODS In a 52-week, multicenter, double-blind, phase 2 trial, we randomly assigned, in a 2:1:2:2 ratio, participants with early Parkinson's disease to receive intravenous infusions of placebo (control) or cinpanemab at a dose of 250 mg, 1250 mg, or 3500 mg every 4 weeks, followed by an active-treatment dose-blinded extension period for up to 112 weeks. The primary end points were the changes from baseline in the Movement Disorder Society-sponsored revision of the Unified Parkinson's Disease Rating Scale (MDS-UPDRS) total score (range, 0 to 236, with higher scores indicating worse performance) at weeks 52 and 72. Secondary end points included MDS-UPDRS subscale scores and striatal binding as assessed on dopamine transporter single-photon-emission computed tomography (DaT-SPECT). RESULTS Of the 357 enrolled participants, 100 were assigned to the control group, 55 to the 250-mg cinpanemab group, 102 to the 1250-mg group, and 100 to the 3500-mg group. The trial was stopped after the week 72 interim analysis owing to lack of efficacy. The change to week 52 in the MDS-UPDRS score was 10.8 points in the control group, 10.5 points in the 250-mg group, 11.3 points in the 1250-mg group, and 10.9 points in the 3500-mg group (adjusted mean difference vs. control, -0.3 points [95% confidence interval {CI}, -4.9 to 4.3], P = 0.90; 0.5 points [95% CI, -3.3 to 4.3], P = 0.80; and 0.1 point [95% CI, -3.8 to 4.0], P = 0.97, respectively). The adjusted mean difference at 72 weeks between participants who received cinpanemab through 72 weeks and the pooled group of those who started cinpanemab at 52 weeks was -0.9 points (95% CI, -5.6 to 3.8) for the 250-mg dose, 0.6 points (95% CI, -3.3 to 4.4) for the 1250-mg dose, and -0.8 points (95% CI, -4.6 to 3.0) for the 3500-mg dose. Results for secondary end points were similar to those for the primary end points. DaT-SPECT imaging at week 52 showed no differences between the control group and any cinpanemab group. The most common adverse events with cinpanemab were headache, nasopharyngitis, and falls. CONCLUSIONS In participants with early Parkinson's disease, the effects of cinpanemab on clinical measures of disease progression and changes in DaT-SPECT imaging did not differ from those of placebo over a 52-week period. (Funded by Biogen; SPARK ClinicalTrials.gov number, NCT03318523.).
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Affiliation(s)
- Anthony E Lang
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Andrew D Siderowf
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Eric A Macklin
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Werner Poewe
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - David J Brooks
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Hubert H Fernandez
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Olivier Rascol
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Nir Giladi
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Fabrizio Stocchi
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Caroline M Tanner
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Ronald B Postuma
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - David K Simon
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Eduardo Tolosa
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Brit Mollenhauer
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Jesse M Cedarbaum
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Kyle Fraser
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - James Xiao
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Karleyton C Evans
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Danielle L Graham
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Inbal Sapir
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Jennifer Inra
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - R Matthew Hutchison
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Minhua Yang
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Tara Fox
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Samantha Budd Haeberlein
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
| | - Tien Dam
- From the Edmond J. Safra Program in Parkinson's Disease, University Health Network, and the University of Toronto, Toronto (A.E.L.), and the Montreal Neurological Institute, Montreal (R.B.P.); the University of Pennsylvania, Philadelphia (A.D.S.); the Biostatistics Center, Massachusetts General Hospital (E.A.M.), Beth Israel Deaconess Medical Center (D.K.S.), and Harvard Medical School (E.A.M., D.K.S.), Boston, and Biogen, Cambridge (K.F., J.X., K.C.E., D.L.G., I.S., J.I., R.M.H., M.Y., S.B.H., T.D.) - all in Massachusetts; Medizinische Universität Innsbruck, Innsbruck, Austria (W.P.); Newcastle University, Newcastle upon Tyne (D.J.B.), and Biogen, Maidenhead (T.F.) - both in the United Kingdom; Aarhus University, Aarhus, Denmark (D.J.B.); the Center for Neurological Restoration, Cleveland Clinic, and Cleveland Clinic Lerner College of Medicine - both in Cleveland (H.H.F.); Clinical Investigation Center 1436, the Departments of Clinical Pharmacology and Neurosciences, NS-PARK-French Clinical Research Infrastructure Network, NeuroToul COEN Center, INSERM, University Hospital of Toulouse, and the University of Toulouse III - both in Toulouse, France (O.R.); Tel Aviv Sourasky Medical Center, and the Sackler School of Medicine and the Sagol School of Neuroscience, Tel Aviv University - both in Tel Aviv, Israel (N.G.); University San Raffaele and IRCCS San Raffaele - both in Rome (F.S.); the University of California, San Diego, La Jolla (C.M.T.), and the San Francisco Veterans Affairs Medical Center, San Francisco (C.M.T.); the University of Barcelona, Barcelona (E.T.); the Department of Neurology, University Medical Center Göttingen, Göttingen, and Paracelsus-Elena-Klinik, Kassel - both in Germany (B.M.); and Coeruleus Clinical Sciences, Woodbridge, CT (J.M.C.)
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Clarke MTM, Mansur A, Rizzo G, Passchier J, Lewis Y, Evans KC, Chen L, Schwarz AJ, Takano A, Gunn RN, Cash DM, Rabiner EA, Rohrer JD. Synaptic PET imaging using [
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C]UCB‐J in frontotemporal dementia. Alzheimers Dement 2021. [DOI: 10.1002/alz.054210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mica TM Clarke
- Dementia Research Centre, Queen Square Institute of Neurology, University College London London United Kingdom
- MINDMAPS Consortium London United Kingdom
| | - Ayla Mansur
- MINDMAPS Consortium London United Kingdom
- Invicro LLC London United Kingdom
- Division of Brain Sciences, Imperial College London London United Kingdom
| | - Gaia Rizzo
- MINDMAPS Consortium London United Kingdom
- Invicro LLC London United Kingdom
| | - Jan Passchier
- MINDMAPS Consortium London United Kingdom
- Invicro LLC London United Kingdom
| | - Yvonne Lewis
- MINDMAPS Consortium London United Kingdom
- Invicro LLC London United Kingdom
| | | | - Laigao Chen
- MINDMAPS Consortium London United Kingdom
- Pfizer Cambridge MA USA
| | - Adam J. Schwarz
- MINDMAPS Consortium London United Kingdom
- Takeda Pharmaceuticals Cambridge MA USA
| | - Akihiro Takano
- MINDMAPS Consortium London United Kingdom
- Takeda Pharmaceutical Company Limited Osaka Japan
| | - Roger N Gunn
- MINDMAPS Consortium London United Kingdom
- Invicro LLC London United Kingdom
- Division of Brain Sciences, Imperial College London London United Kingdom
| | - David M Cash
- Dementia Research Centre, Queen Square Institute of Neurology, University College London London United Kingdom
- MINDMAPS Consortium London United Kingdom
| | - Eugenii A. Rabiner
- MINDMAPS Consortium London United Kingdom
- Invicro LLC London United Kingdom
- Centre for Neuroimaging Sciences, IoPPN, King’s College London United Kingdom
| | - Jonathan D Rohrer
- Dementia Research Centre, Queen Square Institute of Neurology, University College London London United Kingdom
- MINDMAPS Consortium London United Kingdom
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Hutchison RM, Evans KC, Fox T, Yang M, Barakos J, Bedell BJ, Cedarbaum JM, Brys M, Siderowf A, Lang AE. Evaluating dopamine transporter imaging as an enrichment biomarker in a phase 2 Parkinson's disease trial. BMC Neurol 2021; 21:459. [PMID: 34814867 PMCID: PMC8609885 DOI: 10.1186/s12883-021-02470-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 10/25/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dopamine transporter single-photon emission computed tomography (DaT-SPECT) can quantify the functional integrity of the dopaminergic nerve terminals and has been suggested as an imaging modality to verify the clinical diagnosis of Parkinson's disease (PD). Depending on the stage of progression, approximately 5-15% of participants clinically diagnosed with idiopathic PD have been observed in previous studies to have normal DaT-SPECT patterns. However, the utility of DaT-SPECT in enhancing early PD participant selection in a global, multicenter clinical trial of a potentially disease-modifying therapy is not well understood. METHODS The SPARK clinical trial was a phase 2 trial of cinpanemab, a monoclonal antibody against alpha-synuclein, in participants with early PD. DaT-SPECT was performed at screening to select participants with DaT-SPECT patterns consistent with degenerative parkinsonism. Acquisition was harmonised across 82 sites. Images were reconstructed and qualitatively read at a central laboratory by blinded neuroradiologists for inclusion prior to automated quantitative analysis. RESULTS In total, 482 unique participants were screened between January 2018 and May 2019; 3.8% (15/398) of imaged participants were excluded owing to negative DaT-SPECT findings (i.e., scans without evidence of dopaminergic deficit [SWEDD]). CONCLUSION A smaller proportion of SPARK participants were excluded owing to SWEDD status upon DaT-SPECT screening than has been reported in prior studies. Further research is needed to understand the reasons for the low SWEDD rate in this study and whether these results are generalisable to future studies. If supported, the radiation risks, imaging costs, and operational burden of DaT-SPECT for enrichment may be mitigated by clinical assessment and other study design aspects. TRIAL REGISTRATION ClinicalTrials.gov identifier: NCT03318523 . Date submitted: October 19, 2017. First Posted: October 24, 2017.
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Affiliation(s)
| | | | | | - Minhua Yang
- Biogen, 300 Binney Street, Cambridge, MA, 02142, USA
| | | | | | | | | | | | - Anthony E Lang
- Morton and Gloria Shulman Movement Disorders Clinic, Toronto, ON, Canada.,Edmond J. Safra Program in Parkinson's Disease, Toronto, ON, Canada
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Trojano M, Ramió-Torrentà L, Grimaldi LME, Lubetzki C, Schippling S, Evans KC, Ren Z, Muralidharan KK, Licata S, Gafson AR. A randomized study of natalizumab dosing regimens for relapsing–remitting multiple sclerosis. Mult Scler 2021; 27:2240-2253. [PMID: 33821693 PMCID: PMC8597184 DOI: 10.1177/13524585211003020] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: REFINE was an exploratory, dose- and frequency-blinded, prospective, randomized, dose-ranging study in relapsing–remitting multiple sclerosis (RRMS) patients. Objective: To examine the efficacy, safety, and tolerability of natalizumab administered via various regimens in RRMS patients. Methods: Clinically stable RRMS patients previously treated with 300 mg natalizumab intravenously for ⩾12 months were randomized to one of six natalizumab regimens over 60 weeks: 300 mg administered intravenously or subcutaneously every 4 weeks (Q4W), 300 mg intravenously or subcutaneously every 12 weeks (Q12W), or 150 mg intravenously or subcutaneously Q12W. The primary endpoint was the mean cumulative number of combined unique active magnetic resonance imaging (MRI) lesions at week 60. Results: In total, 290 patients were enrolled. All Q12W dosing arms were associated with increased clinical and MRI disease activity and closed early; ⩾39.5% of patients in each Q12W arm met rescue criteria. In the 300 mg intravenous and subcutaneous Q4 W arms, the mean cumulative number of combined unique active MRI lesions was 0.23 and 0.02, respectively; annualized relapse rates were 0.07 and 0.08, respectively; and trough natalizumab serum levels and α4-integrin saturation were comparable. Conclusion: Natalizumab 300 mg subcutaneous Q4W was comparable to 300 mg intravenous Q4W dosing with respect to efficacy, pharmacokinetics/pharmacodynamics, and safety.
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Affiliation(s)
- Maria Trojano
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari “Aldo Moro,” Bari, Italy
| | - Lluís Ramió-Torrentà
- Neurology Department, Dr. Josep Trueta University Hospital, Girona Biomedical Research Institute (IDIBGI), Medical Sciences Department, University of Girona, Girona, Spain
| | - Luigi ME Grimaldi
- Unità Operativa Neurologia, Fondazione Istituto San Raffaele G. Giglio di Cefalù, Cefalù, Italy
| | - Catherine Lubetzki
- Sorbonne University and Paris Brain Institute (ICM), Pitié-Salpêtrière Hospital, Department of Neurology, Assistance Publique–Hôpitaux de Paris, Paris, France
| | - Sven Schippling
- Neuroimmunology and Multiple Sclerosis Research Section, Department of Neurology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
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Chan ST, Evans KC, Song TY, Selb J, van der Kouwe A, Rosen BR, Zheng YP, Ahn AC, Kwong KK. Dynamic brain-body coupling of breath-by-breath O2-CO2 exchange ratio with resting state cerebral hemodynamic fluctuations. PLoS One 2020; 15:e0238946. [PMID: 32956397 PMCID: PMC7505589 DOI: 10.1371/journal.pone.0238946] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 08/26/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND The origin of low frequency cerebral hemodynamic fluctuations (CHF) in the resting state remains unknown. Breath-by breath O2-CO2 exchange ratio (bER) has been reported to correlate with the cerebrovascular response to brief breath hold challenge at the frequency range of 0.008-0.03Hz in healthy adults. bER is defined as the ratio of the change in the partial pressure of oxygen (ΔPO2) to that of carbon dioxide (ΔPCO2) between end inspiration and end expiration. In this study, we aimed to investigate the contribution of respiratory gas exchange (RGE) metrics (bER, ΔPO2 and ΔPCO2) to low frequency CHF during spontaneous breathing. METHODS Twenty-two healthy adults were included. We used transcranial Doppler sonography to evaluate CHF by measuring the changes in cerebral blood flow velocity (ΔCBFv) in bilateral middle cerebral arteries. The regional CHF were mapped with blood oxygenation level dependent (ΔBOLD) signal changes using functional magnetic resonance imaging. Temporal features and frequency characteristics of RGE metrics during spontaneous breathing were examined, and the simultaneous measurements of RGE metrics and CHF (ΔCBFv and ΔBOLD) were studied for their correlation. RESULTS We found that the time courses of ΔPO2 and ΔPCO2 were interdependent but not redundant. The oscillations of RGE metrics were coherent with resting state CHF at the frequency range of 0.008-0.03Hz. Both bER and ΔPO2 were superior to ΔPCO2 in association with CHF while CHF could correlate more strongly with bER than with ΔPO2 in some brain regions. Brain regions with the strongest coupling between bER and ΔBOLD overlapped with many areas of default mode network including precuneus and posterior cingulate. CONCLUSION Although the physiological mechanisms underlying the strong correlation between bER and CHF are unclear, our findings suggest the contribution of bER to low frequency resting state CHF, providing a novel insight of brain-body interaction via CHF and oscillations of RGE metrics.
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Affiliation(s)
- Suk-tak Chan
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Karleyton C. Evans
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Tian-yue Song
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Juliette Selb
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Andre van der Kouwe
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Bruce R. Rosen
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Yong-ping Zheng
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| | - Andrew C. Ahn
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Kenneth K. Kwong
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
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9
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Chan ST, Evans KC, Song TY, Selb J, van der Kouwe A, Rosen BR, Zheng YP, Ahn A, Kwong KK. Cerebrovascular reactivity assessment with O2-CO2 exchange ratio under brief breath hold challenge. PLoS One 2020; 15:e0225915. [PMID: 32208415 PMCID: PMC7092994 DOI: 10.1371/journal.pone.0225915] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Accepted: 02/27/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Hypercapnia during breath holding is believed to be the dominant driver behind the modulation of cerebral blood flow (CBF). However, increasing evidence show that mild hypoxia and mild hypercapnia in breath hold (BH) could work synergistically to enhance CBF response. We hypothesized that breath-by-breath O2-CO2 exchange ratio (bER), defined as the ratio of the change in partial pressure of oxygen (ΔPO2) to that of carbon dioxide (ΔPCO2) between end inspiration and end expiration, would be able to better correlate with the global and regional cerebral hemodynamic responses (CHR) to BH challenge. We aimed to investigate whether bER is a more useful index than end-tidal PCO2 to characterize cerebrovascular reactivity (CVR) under BH challenge. METHODS We used transcranial Doppler ultrasound (TCD) to evaluate CHR under BH challenge by measuring cerebral blood flow velocity (CBFv) in the middle cerebral arteries. Regional changes in CHR to BH and exogenous CO2 challenges were mapped with blood oxygenation level dependent (BOLD) signal changes using functional magnetic resonance imaging (fMRI). We correlated respiratory gas exchange (RGE) metrics (bER, ΔPO2, ΔPCO2, end-tidal PCO2 and PO2, and time of breaths) with CHR (CBFv and BOLD) to BH challenge. Temporal features and frequency characteristics of RGE metrics and their coherence with CHR were examined. RESULTS CHR to brief BH epochs and free breathing were coupled with both ΔPO2 and ΔPCO2. We found that bER was superior to either ΔPO2 or ΔPCO2 alone in coupling with the changes of CBFv and BOLD signals under breath hold challenge. The regional CVR results derived by regressing BOLD signal changes on bER under BH challenge resembled those derived by regressing BOLD signal changes on end-tidal PCO2 under exogenous CO2 challenge. CONCLUSION Our findings provide a novel insight on the potential of using bER to better quantify CVR changes under BH challenge.
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Affiliation(s)
- Suk-tak Chan
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Karleyton C. Evans
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Tian-yue Song
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Juliette Selb
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Andre van der Kouwe
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Bruce R. Rosen
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Yong-ping Zheng
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| | - Andrew Ahn
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
| | - Kenneth K. Kwong
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
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10
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Matthews DC, Lerman H, Lukic A, Andrews RD, Mirelman A, Wernick MN, Giladi N, Strother SC, Evans KC, Cedarbaum JM, Even-Sapir E. FDG PET Parkinson's disease-related pattern as a biomarker for clinical trials in early stage disease. Neuroimage Clin 2018; 20:572-579. [PMID: 30186761 PMCID: PMC6120603 DOI: 10.1016/j.nicl.2018.08.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 08/03/2018] [Accepted: 08/05/2018] [Indexed: 11/30/2022]
Abstract
Background The development of therapeutic interventions for Parkinson disease (PD) is challenged by disease complexity and subjectivity of symptom evaluation. A Parkinson's Disease Related Pattern (PDRP) of glucose metabolism via fluorodeoxyglucose positron emission tomography (FDG-PET) has been reported to correlate with motor symptom scores and may aid the detection of disease-modifying therapeutic effects. Objectives We sought to independently evaluate the potential utility of the PDRP as a biomarker for clinical trials of early-stage PD. Methods Two machine learning approaches (Scaled Subprofile Model (SSM) and NPAIRS with Canonical Variates Analysis) were performed on FDG-PET scans from 17 healthy controls (HC) and 23 PD patients. The approaches were compared regarding discrimination of HC from PD and relationship to motor symptoms. Results Both classifiers discriminated HC from PD (p < 0.01, p < 0.03), and classifier scores for age- and gender- matched HC and PD correlated with Hoehn & Yahr stage (R2 = 0.24, p < 0.015) and UPDRS (R2 = 0.23, p < 0.018). Metabolic patterns were highly similar, with hypometabolism in parieto-occipital and prefrontal regions and hypermetabolism in cerebellum, pons, thalamus, paracentral gyrus, and lentiform nucleus relative to whole brain, consistent with the PDRP. An additional classifier was developed using only PD subjects, resulting in scores that correlated with UPDRS (R2 = 0.25, p < 0.02) and Hoehn & Yahr stage (R2 = 0.16, p < 0.06). Conclusions Two independent analyses performed in a cohort of mild PD patients replicated key features of the PDRP, confirming that FDG-PET and multivariate classification can provide an objective, sensitive biomarker of disease stage with the potential to detect treatment effects on PD progression. The Parkinson's disease-related pattern (PDRP) of glucose metabolic effects is demonstrated in an independent cohort of early stage PD patients. The PDRP pattern of metabolic changes is robust to variations in image processing and choice of classification model. Age-related metabolic changes show partial overlap with the PDRP, suggesting that age-adjustment is an important consideration. The PDRP correlates with motor function as defined by Hoehn & Yahr stage and UPDRS score. An additional data driven metabolic classifier highlights pattern aspects associated with early stage motor decline.
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Affiliation(s)
| | - Hedva Lerman
- Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | | | - Anat Mirelman
- Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Miles N Wernick
- ADM Diagnostics Inc., USA; Medical Imaging Research Center, Illinois Institute of Technology, Chicago, IL, USA
| | - Nir Giladi
- Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Stephen C Strother
- ADM Diagnostics Inc., USA; Rotman Research Institute, Baycrest, Toronto, Ontario, CA, Canada
| | | | | | - Einat Even-Sapir
- Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Dougherty DD, Chou T, Corse AK, Arulpragasam AR, Widge AS, Cusin C, Evans KC, Greenberg BD, Haber SN, Deckersbach T. Acute deep brain stimulation changes in regional cerebral blood flow in obsessive-compulsive disorder. J Neurosurg 2016; 125:1087-1093. [PMID: 26894459 PMCID: PMC9884519 DOI: 10.3171/2015.9.jns151387] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
OBJECTIVE Deep brain stimulation (DBS) is a reversible, nonlesion-based treatment for patients with intractable obsessive-compulsive disorder (OCD). The first studies on DBS for OCD stimulating the ventral capsule/ventral striatum (VC/VS) yielded encouraging results for this neuroanatomical site's therapeutic efficacy. This investigation was conducted to better understand which regions of the cortico-striatal-thalamic-cortical network were acutely affected by VC/VS DBS for OCD. Furthermore, the objective was to identify which brain regions demonstrated changes in perfusion, as stimulation was applied across a dorsoventral lead axis that corresponded to different anatomical locations in the VC/VS. METHODS Six patients receiving VC/VS DBS for OCD underwent oxygen-15 positron emission tomography (15O-PET) scanning. Monopolar DBS was delivered at each of the 4 different electrodes on the stimulating lead in the VC/VS. The data were analyzed using SPM5. Paired t-tests were run in SPSS to identify significant changes in regional cerebral blood flow (rCBF) between stimulation conditions. Pearson's r correlations were run between these significant changes in rCBF and changes in OCD and depressive symptom severity. RESULTS Perfusion in the dorsal anterior cingulate cortex (dACC) significantly increased when monopolar DBS was turned on at the most ventral DBS contact, and this increase in dACC activity was correlated with reductions in depressive symptom severity (r(5) = -0.994, p = 0.001). Perfusion in the thalamus, striatum, and globus pallidus significantly increased when DBS was turned on at the most dorsal contact. CONCLUSIONS DBS of the VC/VS appears to modulate activity in the regions implicated in the pathophysiology of OCD. Different regions in the cortico-striatal-thalamic-cortical circuit showed increased perfusion based on whether the stimulation was more ventral or dorsal along the lead axis in the VC/VS. Evidence was found that DBS at the most ventral site was associated with clinical changes in depressive symptom severity, but not OCD symptom severity.
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Affiliation(s)
- Darin D. Dougherty
- Division of Neurotherapeutics, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown
| | - Tina Chou
- Division of Neurotherapeutics, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown,Department of Psychology, Harvard University, Cambridge
| | - Andrew K. Corse
- Division of Neurotherapeutics, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown
| | - Amanda R. Arulpragasam
- Division of Neurotherapeutics, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown
| | - Alik S. Widge
- Division of Neurotherapeutics, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown,Picower Institute for Learning & Memory, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Cristina Cusin
- Division of Neurotherapeutics, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown
| | - Karleyton C. Evans
- Division of Neurotherapeutics, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown
| | - Benjamin D. Greenberg
- Department of Psychiatry and Behavioral Sciences, Butler Hospital and Brown Medical School, Providence, Rhode Island
| | - Suzanne N. Haber
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, New York
| | - Thilo Deckersbach
- Division of Neurotherapeutics, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown
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Bianciardi M, Toschi N, Polimeni JR, Evans KC, Bhat H, Keil B, Rosen BR, Boas DA, Wald LL. The pulsatility volume index: an indicator of cerebrovascular compliance based on fast magnetic resonance imaging of cardiac and respiratory pulsatility. Philos Trans A Math Phys Eng Sci 2016; 374:rsta.2015.0184. [PMID: 27044992 PMCID: PMC4822444 DOI: 10.1098/rsta.2015.0184] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/26/2015] [Indexed: 05/03/2023]
Abstract
The influence of cardiac activity on the viscoelastic properties of intracranial tissue is one of the mechanisms through which brain-heart interactions take place, and is implicated in cerebrovascular disease. Cerebrovascular disease risk is not fully explained by current risk factors, including arterial compliance. Cerebrovascular compliance is currently estimated indirectly through Doppler sonography and magnetic resonance imaging (MRI) measures of blood velocity changes. In order to meet the need for novel cerebrovascular disease risk factors, we aimed to design and validate an MRI indicator of cerebrovascular compliance based on direct endogenous measures of blood volume changes. We implemented a fast non-gated two-dimensional MRI pulse sequence based on echo-planar imaging (EPI) with ultra-short repetition time (approx. 30-50 ms), which stepped through slices every approximately 20 s. We constrained the solution of the Bloch equations for spins moving faster than a critical speed to produce an endogenous contrast primarily dependent on spin volume changes, and an approximately sixfold signal gain compared with Ernst angle acquisitions achieved by the use of a 90° flip angle. Using cardiac and respiratory peaks detected on physiological recordings, average cardiac and respiratory MRI pulse waveforms in several brain compartments were obtained at 7 Tesla, and used to derive a compliance indicator, the pulsatility volume index (pVI). The pVI, evaluated in larger cerebral arteries, displayed significant variation within and across vessels. Multi-echo EPI showed the presence of significant pulsatility effects in both S0 and [Formula: see text] signals, compatible with blood volume changes. Lastly, the pVI dynamically varied during breath-holding compared with normal breathing, as expected for a compliance indicator. In summary, we characterized and performed an initial validation of a novel MRI indicator of cerebrovascular compliance, which might prove useful to investigate brain-heart interactions in cerebrovascular disease and other disorders.
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Affiliation(s)
- Marta Bianciardi
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA
| | - Nicola Toschi
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA Medical Physics Section, Department of Biomedicine and Prevention, Faculty of Medicine, University of Rome 'Tor Vergata', Via Montpellier 1, 00133 Rome, Italy
| | - Jonathan R Polimeni
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA
| | - Karleyton C Evans
- Department of Psychiatry, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA
| | - Himanshu Bhat
- Siemens Healthcare, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA
| | - Boris Keil
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA Institute for Medical Physics and Radiation Protection, Life Science Engineering, Mittelhessen University of Applied Science, Wiesenstrasse 14, 35390 Giessen, Germany
| | - Bruce R Rosen
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA
| | - David A Boas
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA
| | - Lawrence L Wald
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, Boston, MA 02129, USA
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13
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Dougherty DD, Rezai AR, Carpenter LL, Howland RH, Bhati MT, O'Reardon JP, Eskandar EN, Baltuch GH, Machado AD, Kondziolka D, Cusin C, Evans KC, Price LH, Jacobs K, Pandya M, Denko T, Tyrka AR, Brelje T, Deckersbach T, Kubu C, Malone DA. A Randomized Sham-Controlled Trial of Deep Brain Stimulation of the Ventral Capsule/Ventral Striatum for Chronic Treatment-Resistant Depression. Biol Psychiatry 2015; 78:240-8. [PMID: 25726497 DOI: 10.1016/j.biopsych.2014.11.023] [Citation(s) in RCA: 293] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 10/23/2014] [Accepted: 11/04/2014] [Indexed: 12/28/2022]
Abstract
BACKGROUND Multiple open-label trials of deep brain stimulation (DBS) for treatment-resistant depression (TRD), including those targeting the ventral capsule/ventral striatum target, have shown encouraging response rates. However, no randomized controlled trials of DBS for TRD have been published. METHODS Thirty patients with TRD participated in a sham-controlled trial of DBS at the ventral capsule/ventral striatum target for TRD. Patients were randomized to active versus sham DBS treatment in a blinded fashion for 16 weeks, followed by an open-label continuation phase. The primary outcome measure was response, defined as a 50% or greater improvement on the Montgomery-Åsberg Depression Rating Scale from baseline. RESULTS There was no significant difference in response rates between the active (3 of 15 subjects; 20%) and control (2 of 14 subjects; 14.3%) treatment arms and no significant difference between change in Montgomery-Åsberg Depression Rating Scale scores as a continuous measure upon completion of the 16-week controlled phase of the trial. The response rates at 12, 18, and 24 months during the open-label continuation phase were 20%, 26.7%, and 23.3%, respectively. CONCLUSION The results of this first randomized controlled study of DBS for the treatment of TRD did not demonstrate a significant difference in response rates between the active and control groups at the end of the 16-week controlled phase. However, a range of 20% to 26.7% of patients did achieve response at any time during the open-label continuation phase. Future studies, perhaps utilizing alternative study designs and stimulation parameters, are needed.
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Affiliation(s)
- Darin D Dougherty
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts.
| | - Ali R Rezai
- Department of Psychiatry and Psychology, Cleveland Clinic, Cleveland, Ohio
| | - Linda L Carpenter
- Butler Hospital, Alpert Medical School of Brown University, Providence, Rhode Island
| | - Robert H Howland
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, Pittsburgh
| | - Mahendra T Bhati
- Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - John P O'Reardon
- Department of Psychiatry, University of Medicine and Dentistry of New Jersey School of Osteopathic Medicine, Stratford, New Jersey
| | - Emad N Eskandar
- Department of Neurosurgery, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Gordon H Baltuch
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Andre D Machado
- Center for Neurological Restoration, Cleveland Clinic, Cleveland, Ohio
| | - Douglas Kondziolka
- Department of Neurosurgery, New York University Langone Medical Center, New York University, New York, New York
| | - Cristina Cusin
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Karleyton C Evans
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Lawrence H Price
- Butler Hospital, Alpert Medical School of Brown University, Providence, Rhode Island
| | - Karen Jacobs
- Department of Psychiatry and Psychology, Cleveland Clinic, Cleveland, Ohio
| | - Mayur Pandya
- Department of Psychiatry and Psychology, Cleveland Clinic, Cleveland, Ohio
| | - Timothey Denko
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, Pittsburgh
| | - Audrey R Tyrka
- Butler Hospital, Alpert Medical School of Brown University, Providence, Rhode Island
| | | | - Thilo Deckersbach
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Cynthia Kubu
- Department of Psychiatry and Psychology, Cleveland Clinic, Cleveland, Ohio
| | - Donald A Malone
- Department of Psychiatry and Psychology, Cleveland Clinic, Cleveland, Ohio
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Roffman JL, Witte JM, Tanner AS, Ghaznavi S, Abernethy RS, Crain LD, Giulino PU, Lable I, Levy RA, Dougherty DD, Evans KC, Fava M. Neural predictors of successful brief psychodynamic psychotherapy for persistent depression. Psychother Psychosom 2015; 83:364-70. [PMID: 25323387 DOI: 10.1159/000364906] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 05/26/2014] [Indexed: 01/01/2023]
Abstract
BACKGROUND Psychodynamic psychotherapy has been used to treat depression for more than a century. However, not all patients respond equally well, and there are few reliable predictors of treatment outcome. METHODS We used resting (18)F-fluorodeoxyglucose positron emission tomography ((18)FDG-PET) scans immediately before and after a structured, open trial of brief psychodynamic psychotherapy (n = 16) in conjunction with therapy process ratings and clinical outcome measures to identify neural correlates of treatment response. RESULTS Pretreatment glucose metabolism within the right posterior insula correlated with depression severity. Reductions in depression scores correlated with a pre- to posttreatment reduction in right insular metabolism, which in turn correlated with higher objective measures of patient insight obtained from videotaped therapy sessions. Pretreatment metabolism in the right precuneus was significantly higher in patients who completed treatment and correlated with psychological mindedness. CONCLUSIONS Resting brain metabolism predicted both clinical course and relevant psychotherapeutic process during short-term psychodynamic psychotherapy for depression.
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Affiliation(s)
- Joshua L Roffman
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, Mass., USA
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15
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Chan ST, Evans KC, Rosen BR, Song TY, Kwong KK. A case study of magnetic resonance imaging of cerebrovascular reactivity: a powerful imaging marker for mild traumatic brain injury. Brain Inj 2014; 29:403-7. [PMID: 25384127 DOI: 10.3109/02699052.2014.974209] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PRIMARY OBJECTIVE To use breath-hold functional magnetic resonance imaging (fMRI) to localize the brain regions with impaired cerebrovascular reactivity (CVR) in a female patient diagnosed with mild traumatic brain injury (mTBI). The extent of impaired CVR was evaluated 2 months after concussion. Follow-up scan was performed 1 year post-mTBI using the same breath-hold fMRI technique. RESEARCH DESIGN Case report. METHODS AND PROCEDURES fMRI blood oxygenation dependent level (BOLD) signals were measured under breath-hold challenge in a female mTBI patient 2 months after concussion followed by a second fMRI with breath-hold challenge 1 year later. CVR was expressed as the percentage change of BOLD signals per unit time of breath-hold. MAIN OUTCOMES In comparison with CVR measurement of normal control subjects, statistical maps of CVR revealed substantial neurovascular deficits and hemispheric asymmetry within grey and white matter in the initial breath-hold fMRI scan. Follow-up breath-hold fMRI performed 1 year post-mTBI demonstrated normalization of CVR accompanied with symptomatic recovery. CONCLUSIONS CVR may serve as an imaging biomarker to detect subtle deficits in both grey and white matter for individual diagnosis of mTBI. The findings encourage further investigation of hypercapnic fMRI as a diagnostic tool for mTBI.
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Affiliation(s)
- Suk-tak Chan
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging and
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16
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Fan AP, Evans KC, Stout JN, Rosen BR, Adalsteinsson E. Regional quantification of cerebral venous oxygenation from MRI susceptibility during hypercapnia. Neuroimage 2014; 104:146-55. [PMID: 25300201 DOI: 10.1016/j.neuroimage.2014.09.068] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 08/18/2014] [Accepted: 09/30/2014] [Indexed: 12/27/2022] Open
Abstract
There is an unmet medical need for noninvasive imaging of regional brain oxygenation to manage stroke, tumor, and neurodegenerative diseases. Oxygenation imaging from magnetic susceptibility in MRI is a promising new technique to measure local venous oxygen extraction fraction (OEF) along the cerebral venous vasculature. However, this approach has not been tested in vivo at different levels of oxygenation. The primary goal of this study was to test whether susceptibility imaging of oxygenation can detect OEF changes induced by hypercapnia, via CO2 inhalation, within selected a priori brain regions. Ten healthy subjects were scanned at 3T with a 32-channel head coil. The end-tidal CO2 (ETCO2) was monitored continuously and inspired gases were adjusted to achieve steady-state conditions of eucapnia (41±3mmHg) and hypercapnia (50±4mmHg). Gradient echo phase images and pseudo-continuous arterial spin labeling (pcASL) images were acquired to measure regional OEF and CBF respectively during eucapnia and hypercapnia. By assuming constant cerebral oxygen consumption throughout both gas states, regional CBF values were computed to predict the local change in OEF in each brain region. Hypercapnia induced a relative decrease in OEF of -42.3% in the straight sinus, -39.9% in the internal cerebral veins, and approximately -50% in pial vessels draining each of the occipital, parietal, and frontal cortical areas. Across volunteers, regional changes in OEF correlated with changes in ETCO2. The reductions in regional OEF (via phase images) were significantly correlated (P<0.05) with predicted reductions in OEF derived from CBF data (via pcASL images). These findings suggest that susceptibility imaging is a promising technique for OEF measurements, and may serve as a clinical biomarker for brain conditions with aberrant regional oxygenation.
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Affiliation(s)
- Audrey P Fan
- Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, USA; Radiology, Athinoula A. Martinos Center for Biomedical Imaging, 149 Thirteenth Street, Charlestown, MA, USA.
| | - Karleyton C Evans
- Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, USA; Psychiatry, Massachusetts General Hospital East, 149 Thirteenth Street, Charlestown, MA, USA.
| | - Jeffrey N Stout
- Radiology, Athinoula A. Martinos Center for Biomedical Imaging, 149 Thirteenth Street, Charlestown, MA, USA; Harvard-MIT Health Sciences and Technology, Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, USA.
| | - Bruce R Rosen
- Radiology, Athinoula A. Martinos Center for Biomedical Imaging, 149 Thirteenth Street, Charlestown, MA, USA; Harvard-MIT Health Sciences and Technology, Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, USA.
| | - Elfar Adalsteinsson
- Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, USA; Radiology, Athinoula A. Martinos Center for Biomedical Imaging, 149 Thirteenth Street, Charlestown, MA, USA; Harvard-MIT Health Sciences and Technology, Institute of Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, USA.
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17
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Binks AP, Evans KC, Reed JD, Moosavi SH, Banzett RB. The time-course of cortico-limbic neural responses to air hunger. Respir Physiol Neurobiol 2014; 204:78-85. [PMID: 25263029 DOI: 10.1016/j.resp.2014.09.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 09/09/2014] [Accepted: 09/11/2014] [Indexed: 01/30/2023]
Abstract
Several studies have mapped brain regions associated with acute dyspnea perception. However, the time-course of brain activity during sustained dyspnea is unknown. Our objective was to determine the time-course of neural activity when dyspnea is sustained. Eight healthy subjects underwent brain blood oxygen level dependent functional magnetic imaging (BOLD-fMRI) during mechanical ventilation with constant mild hypercapnia (∼ 45 mm Hg). Subjects rated dyspnea (air hunger) via visual analog scale (VAS). Tidal volume (V(T)) was alternated every 90 s between high VT (0.96 ± 0.23 L) that provided respiratory comfort (12 ± 6% full scale) and low V(T) (0.48 ± 0.08 L) which evoked air hunger (56 ± 11% full scale). BOLD signal was extracted from a priori brain regions and combined with VAS data to determine air hunger related neural time-course. Air hunger onset was associated with BOLD signal increases that followed two distinct temporal profiles within sub-regions of the anterior insula, anterior cingulate and prefrontal cortices (cortico-limbic circuitry): (1) fast, BOLD signal peak <30s and (2) slow, BOLD signal peak >40s. BOLD signal during air hunger offset followed fast and slow temporal profiles symmetrical, but inverse (signal decreases) to the time-courses of air hunger onset. We conclude that differential cortico-limbic circuit elements have unique contributions to dyspnea sensation over time. We suggest that previously unidentified sub-regions are responsible for either the acute awareness or maintenance of dyspnea. These data enhance interpretation of previous studies and inform hypotheses for future dyspnea research.
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Affiliation(s)
- Andrew P Binks
- Department of Biomedical Sciences, University of South Carolina School of Medicine, Greenville, SC, USA
| | - Karleyton C Evans
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA.
| | - Jeffrey D Reed
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA
| | - Shakeeb H Moosavi
- Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, UK
| | - Robert B Banzett
- Harvard Medical School, Boston, MA, USA; Division Pulmonary and Critical Care Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
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18
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Selb J, Boas DA, Chan ST, Evans KC, Buckley EM, Carp SA. Sensitivity of near-infrared spectroscopy and diffuse correlation spectroscopy to brain hemodynamics: simulations and experimental findings during hypercapnia. Neurophotonics 2014; 1:015005. [PMID: 25453036 PMCID: PMC4247161 DOI: 10.1117/1.nph.1.1.015005] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 06/12/2014] [Accepted: 06/25/2014] [Indexed: 05/18/2023]
Abstract
Near-infrared spectroscopy (NIRS) and diffuse correlation spectroscopy (DCS) are two diffuse optical technologies for brain imaging that are sensitive to changes in hemoglobin concentrations and blood flow, respectively. Measurements for both modalities are acquired on the scalp, and therefore hemodynamic processes in the extracerebral vasculature confound the interpretation of cortical hemodynamic signals. The sensitivity of NIRS to the brain versus the extracerebral tissue and the contrast-to-noise ratio (CNR) of NIRS to cerebral hemodynamic responses have been well characterized, but the same has not been evaluated for DCS. This is important to assess in order to understand their relative capabilities in measuring cerebral physiological changes. We present Monte Carlo simulations on a head model that demonstrate that the relative brain-to-scalp sensitivity is about three times higher for DCS (0.3 at 3 cm) than for NIRS (0.1 at 3 cm). However, because DCS has higher levels of noise due to photon-counting detection, the CNR is similar for both modalities in response to a physiologically realistic simulation of brain activation. Even so, we also observed higher CNR of the hemodynamic response during graded hypercapnia in adult subjects with DCS than with NIRS.
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Affiliation(s)
- Juliette Selb
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Department of Radiology, Optics Division, 149 13th Street, Charlestown, Massachusetts 02129, United States
- Address all correspondence to: Juliette Selb, E-mail:
| | - David A. Boas
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Department of Radiology, Optics Division, 149 13th Street, Charlestown, Massachusetts 02129, United States
| | - Suk-Tak Chan
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Department of Radiology, Optics Division, 149 13th Street, Charlestown, Massachusetts 02129, United States
| | - Karleyton C. Evans
- Massachusetts General Hospital, Harvard Medical School, Department of Psychiatry, 149 13th Street, Charlestown, Massachusetts 02129, United States
| | - Erin M. Buckley
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Department of Radiology, Optics Division, 149 13th Street, Charlestown, Massachusetts 02129, United States
| | - Stefan A. Carp
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Department of Radiology, Optics Division, 149 13th Street, Charlestown, Massachusetts 02129, United States
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20
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Kopell BH, Halverson J, Butson CR, Dickinson M, Bobholz J, Harsch H, Rainey C, Kondziolka D, Howland R, Eskandar E, Evans KC, Dougherty DD. Epidural cortical stimulation of the left dorsolateral prefrontal cortex for refractory major depressive disorder. Neurosurgery 2012; 69:1015-29; discussion 1029. [PMID: 21709597 DOI: 10.1227/neu.0b013e318229cfcd] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND A significant number of patients with major depressive disorder are unresponsive to conventional therapies. For these patients, neuromodulation approaches are being investigated. OBJECTIVE To determine whether epidural cortical stimulation at the left dorsolateral prefrontal cortex is safe and efficacious for major depressive disorder through a safety and feasibility study. METHODS Twelve patients were recruited in this randomized, single-blind, sham-controlled study with a 104-week follow-up period. The main outcome measures were Hamilton Depression Rating Scale-28 (HDRS), Montgomery-Asberg Depression Rating Scale (MADRS), Global Assessment of Function (GAF), and Quality of Life Enjoyment and Satisfaction (QLES) questionnaire. An electrode was implanted over Brodmann area 9/46 in the left hemisphere. The electrode provided long-term stimulation to this target via its connections to an implanted neurostimulator in the chest. RESULTS During the sham-controlled phase, there was no statistical difference between sham and active stimulation, although a trend toward efficacy was seen with the active stimulation group. In the open-label phase, we observed a significant improvement in outcome scores for the HDRS, MADRS, and GAF but not the QLES (HDRS: df = 7, F = 7.72, P < .001; MADRS: df = 7, F = 8.2, P < .001; GAF: df = 5, F = 16.87, P < .001; QLES: df = 5, F = 1.32, P > .2; repeated measures ANOVA). With regard to the HDRS, 6 patients had ≥ 40% improvement, 5 patients had ≥ 50% improvement, and 4 subjects achieved remission (HDRS < 10) at some point during the study. CONCLUSION Epidural cortical stimulation of the left dorsolateral prefrontal cortex appears to be a safe and potentially efficacious neuromodulation approach for treatment-refractory major depressive disorder.
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Affiliation(s)
- Brian Harris Kopell
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA.
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Kopell BH, Halverson J, Butson CR, Dickinson M, Bobholz J, Harsch H, Rainey C, Kondziolka D, Howland R, Eskandar E, Evans KC, Dougherty DD. In Reply. Neurosurgery 2012. [DOI: 10.1227/neu.0b013e31823a3219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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22
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Cusin C, Evans KC, Carpenter LL, Greenberg BD, Malone DA, Eskandar E, Dougherty DD. Deep Brain Stimulation for Treatment Resistant Depression: The Role of the Ventral Capsule/Ventral Striatum. Psychiatr Ann 2010. [DOI: 10.3928/00485713-20100924-04] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Evans KC. Cortico-limbic circuitry and the airways: insights from functional neuroimaging of respiratory afferents and efferents. Biol Psychol 2010; 84:13-25. [PMID: 20211221 DOI: 10.1016/j.biopsycho.2010.02.005] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 02/01/2010] [Accepted: 02/11/2010] [Indexed: 01/25/2023]
Abstract
After nearly two decades of active research, functional neuroimaging has demonstrated utility in the identification of cortical, limbic, and paralimbic (cortico-limbic) brain regions involved in respiratory control and respiratory perception. Before the recent boon of human neuroimaging studies, the location of the principal components of respiratory-related cortico-limbic circuitry had been unknown and their function had been poorly understood. Emerging neuroimaging evidence in both healthy and patient populations suggests that cognitive and emotional/affective processing within cortico-limbic circuitry modulates respiratory control and respiratory perception. This paper will review functional neuroimaging studies of respiration with a focus on whole brain investigations of sensorimotor pathways that have identified respiratory-related neural circuitry known to overlap emotional/affective cortico-limbic circuitry. To aid the interpretation of present and future findings, the complexities and challenges underlying neuroimaging methodologies will also be reviewed as applied to the study of respiration physiology.
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Affiliation(s)
- Karleyton C Evans
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, 13th Street, Charlestown, MA 02129, USA.
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Van Dijk KRA, Hedden T, Venkataraman A, Evans KC, Lazar SW, Buckner RL. Intrinsic functional connectivity as a tool for human connectomics: theory, properties, and optimization. J Neurophysiol 2010; 103:297-321. [PMID: 19889849 PMCID: PMC2807224 DOI: 10.1152/jn.00783.2009] [Citation(s) in RCA: 1388] [Impact Index Per Article: 99.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resting state functional connectivity MRI (fcMRI) is widely used to investigate brain networks that exhibit correlated fluctuations. While fcMRI does not provide direct measurement of anatomic connectivity, accumulating evidence suggests it is sufficiently constrained by anatomy to allow the architecture of distinct brain systems to be characterized. fcMRI is particularly useful for characterizing large-scale systems that span distributed areas (e.g., polysynaptic cortical pathways, cerebro-cerebellar circuits, cortical-thalamic circuits) and has complementary strengths when contrasted with the other major tool available for human connectomics-high angular resolution diffusion imaging (HARDI). We review what is known about fcMRI and then explore fcMRI data reliability, effects of preprocessing, analysis procedures, and effects of different acquisition parameters across six studies (n = 98) to provide recommendations for optimization. Run length (2-12 min), run structure (1 12-min run or 2 6-min runs), temporal resolution (2.5 or 5.0 s), spatial resolution (2 or 3 mm), and the task (fixation, eyes closed rest, eyes open rest, continuous word-classification) were varied. Results revealed moderate to high test-retest reliability. Run structure, temporal resolution, and spatial resolution minimally influenced fcMRI results while fixation and eyes open rest yielded stronger correlations as contrasted to other task conditions. Commonly used preprocessing steps involving regression of nuisance signals minimized nonspecific (noise) correlations including those associated with respiration. The most surprising finding was that estimates of correlation strengths stabilized with acquisition times as brief as 5 min. The brevity and robustness of fcMRI positions it as a powerful tool for large-scale explorations of genetic influences on brain architecture. We conclude by discussing the strengths and limitations of fcMRI and how it can be combined with HARDI techniques to support the emerging field of human connectomics.
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Affiliation(s)
- Koene R A Van Dijk
- Harvard University-Center for Brain Science, 52 Oxford Street, Cambridge, MA 02138, USA
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25
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Hölzel BK, Carmody J, Evans KC, Hoge EA, Dusek JA, Morgan L, Pitman RK, Lazar SW. Stress reduction correlates with structural changes in the amygdala. Soc Cogn Affect Neurosci 2009; 5:11-7. [PMID: 19776221 DOI: 10.1093/scan/nsp034] [Citation(s) in RCA: 265] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Stress has significant adverse effects on health and is a risk factor for many illnesses. Neurobiological studies have implicated the amygdala as a brain structure crucial in stress responses. Whereas hyperactive amygdala function is often observed during stress conditions, cross-sectional reports of differences in gray matter structure have been less consistent. We conducted a longitudinal MRI study to investigate the relationship between changes in perceived stress with changes in amygdala gray matter density following a stress-reduction intervention. Stressed but otherwise healthy individuals (N = 26) participated in an 8-week mindfulness-based stress reduction intervention. Perceived stress was rated on the perceived stress scale (PSS) and anatomical MR images were acquired pre- and post-intervention. PSS change was used as the predictive regressor for changes in gray matter density within the bilateral amygdalae. Following the intervention, participants reported significantly reduced perceived stress. Reductions in perceived stress correlated positively with decreases in right basolateral amygdala gray matter density. Whereas prior studies found gray matter modifications resulting from acquisition of abstract information, motor and language skills, this study demonstrates that neuroplastic changes are associated with improvements in a psychological state variable.
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26
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Evans KC, Dougherty DD, Schmid AM, Scannell E, McCallister A, Benson H, Dusek JA, Lazar SW. Modulation of spontaneous breathing via limbic/paralimbic-bulbar circuitry: an event-related fMRI study. Neuroimage 2009; 47:961-71. [PMID: 19450692 DOI: 10.1016/j.neuroimage.2009.05.025] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Revised: 04/13/2009] [Accepted: 05/08/2009] [Indexed: 10/20/2022] Open
Abstract
It is well established that pacemaker neurons in the brainstem provide automatic control of breathing for metabolic homeostasis and survival. During waking spontaneous breathing, cognitive and emotional demands can modulate the intrinsic brainstem respiratory rhythm. However the neural circuitry mediating this modulation is unknown. Studies of supra-pontine influences on the control of breathing have implicated limbic/paralimbic-bulbar circuitry, but these studies have been limited to either invasive surgical electrophysiological methods or neuroimaging during substantial respiratory provocation. Here we probed the limbic/paralimbic-bulbar circuitry for respiratory-related neural activity during unlabored spontaneous breathing at rest as well as during a challenging cognitive task (sustained random number generation). Functional magnetic resonance imaging (fMRI) with simultaneous physiological monitoring (heart rate, respiratory rate, tidal volume, end-tidal CO(2)) was acquired in 14 healthy subjects during each condition. The cognitive task produced expected increases in breathing rate, while end-tidal CO(2) and heart rate did not significantly differ between conditions. The respiratory cycle served as the input function for breath-by-breath, event-related, voxel-wise, random-effects image analyses in SPM5. Main effects analyses (cognitive task+rest) demonstrated the first evidence of coordinated neural activity associated with spontaneous breathing within the medulla, pons, midbrain, amygdala, anterior cingulate and anterior insular cortices. Between-condition paired t-tests (cognitive task>rest) demonstrated modulation within this network localized to the dorsal anterior cingulate and pontine raphe magnus nucleus. We propose that the identified limbic/paralimbic-bulbar circuitry plays a significant role in cognitive and emotional modulation of spontaneous breathing.
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Affiliation(s)
- Karleyton C Evans
- Department of Psychiatry, Division of Neurotherapeutics, Massachusetts General Hospital-East, 13th Street, Building 149, Suite 2625, Charlestown, MA 02129, USA.
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Evans KC, Simon NM, Dougherty DD, Hoge EA, Worthington JJ, Chow C, Kaufman RE, Gold AL, Fischman AJ, Pollack MH, Rauch SL. A PET study of tiagabine treatment implicates ventral medial prefrontal cortex in generalized social anxiety disorder. Neuropsychopharmacology 2009; 34:390-8. [PMID: 18536708 DOI: 10.1038/npp.2008.69] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Corticolimbic circuitry has been implicated in generalized social anxiety disorder (gSAD) by several neuroimaging symptom provocation studies. However, there are limited data regarding resting state or treatment effects on regional cerebral metabolic rate of glucose uptake (rCMRglu). Given evidence for anxiolytic effects conferred by tiagabine, a gamma-aminobutyric acid (GABA) reuptake inhibitor, the present [(18)F] fluorodeoxyglucose-positron emission tomography ((18)FDG-PET) study sought to (1) compare resting rCMRglu between healthy control (HC) and pretreatment gSAD cohorts, (2) examine pre- to post-tiagabine treatment rCMRglu changes in gSAD, and (3) determine rCMRglu predictors of tiagabine treatment response. Fifteen unmedicated individuals with gSAD and ten HCs underwent a baseline (pretreatment) resting-state (18)FDG-PET scan. Twelve of the gSAD individuals completed an open, 6-week, flexible dose trial of tiagabine, and underwent a second (posttreatment) resting-state (18)FDG-PET scan. Compared to the HC subjects, individuals with gSAD demonstrated less pretreatment rCMRglu within the anterior cingulate cortex and ventral medial prefrontal cortex (vmPFC) at baseline. Following tiagabine treatment, vmPFC rCMRglu increased significantly in the gSAD group. Further, the magnitude of treatment response was inversely correlated with pretreatment rCMRglu within vmPFC. Taken together the present findings converge with neuroimaging findings from studies of social cognition in healthy individuals and symptom provocation in gSAD to support a role for the vmPFC in the pathophysiology of gSAD. Given the pharmacological profile of tiagabine, these findings suggest that its therapeutic effects in gSAD may be mediated by GABAergic modulation within the vmPFC.
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Affiliation(s)
- Karleyton C Evans
- Department of Psychiatry, Psychiatric Neuroscience Division, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02129, USA.
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Evans KC, Wright CI, Wedig MM, Gold AL, Pollack MH, Rauch SL. A functional MRI study of amygdala responses to angry schematic faces in social anxiety disorder. Depress Anxiety 2008; 25:496-505. [PMID: 17595018 DOI: 10.1002/da.20347] [Citation(s) in RCA: 154] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Neuroimaging studies using angry or contemptuous human facial photographic stimuli have suggested amygdala hyper-responsivity in social anxiety disorder (SAD). We sought to determine if an angry "schematic face" (simple line drawing) would evoke exaggerated amygdalar responses in SAD patients compared with healthy control (HC) subjects. Angry, happy, and neutral schematic faces were overtly presented to matched cohorts of 11 SAD and 11 HC subjects for passive viewing, whereas brain functional magnetic resonance imaging signal was measured at 1.5 Tesla. Voxel-wise analyses were performed using a random effects model in SPM99. Compared with HC subjects, SAD patients exhibited exaggerated responses in the right amygdala for the Angry versus Neutral contrast. The findings of exaggerated amygdala responses to angry schematic faces in SAD converge with results from earlier neuroimaging studies and illustrate the potential utility of schematic faces for probing amygdala function in psychiatric disorders. One prospective advantage of schematic faces is that they may minimize confounds related to gender, age, or race effects. However, extending earlier findings in healthy subjects, schematic faces appear more effective for probing amygdala responses to arousal-based (Angry versus Neutral) as opposed to valence-based (Angry versus Happy) contrasts.
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Affiliation(s)
- Karleyton C Evans
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02129, USA.
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Simon NM, Weiss AM, Kradin R, Evans KC, Reese HE, Otto MW, Oppenheimer JE, Smoller JW, Zalta A, Worthington JJ, Pollack MH. The relationship of anxiety disorders, anxiety sensitivity and pulmonary dysfunction with dyspnea-related distress and avoidance. J Nerv Ment Dis 2006; 194:951-7. [PMID: 17164635 DOI: 10.1097/01.nmd.0000249062.25829.53] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Little is known about factors that mediate the relationship between anxiety and respiratory-related distress and disability. We hypothesized that elevations in anxiety sensitivity would be associated with greater severity of dyspnea, greater dyspnea-related avoidance, and poorer subjective assessment of health in patients with dyspnea referred for pulmonary function testing, regardless of objective evidence of pulmonary dysfunction. A total of 182 consecutive patients receiving pulmonary function tests to evaluate dyspnea were screened with a patient-rated Primary Care Evaluation of Mental Disorders and completed the Anxiety Sensitivity Index and questionnaires assessing symptom severity and avoidance. Anxiety Sensitivity Index score predicted more severe subjective dyspnea and greater dyspnea-related avoidance, even after adjustment for anxiety disorders and pulmonary dysfunction. Despite some limitations, these data provide preliminary support that strategies to identify, measure, and address high levels of anxiety sensitivity should be examined to reduce subjective distress and improve functioning for patients with dyspnea.
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Affiliation(s)
- Naomi M Simon
- Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
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Abstract
BACKGROUND Functional neuroimaging has begun to show promise as a clinical tool in the prediction of treatment response in mood and anxiety disorders. Given the variance in patient responses to psychiatric treatments, the use of such predictive tools could be tremendously valuable, especially in situations where treatments carry substantial risks or costs. METHODS A literature search was conducted in December 2004 to identify published neuroimaging treatment prediction papers. "Neuroimaging," "treatment," and "depression or anxiety" were used as keywords. Studies of treatment prediction were complemented by studies of treatment effects to provide context. RESULTS Fifteen original published papers were identified as investigations of treatment prediction in mood and anxiety disorders. These studies have predominantly been conducted in patients with major depression (MDD) and obsessive-compulsive disorder (OCD). We review this literature and provide a discussion of design considerations in psychiatric neuroimaging studies of treatment response prediction. CONCLUSIONS The neuroimaging literature pertaining to treatment response prediction is largely limited to studies of MDD and OCD. While these initial reports are preliminary, the findings reviewed suggest that treatment outcome may be predicted by patterns of pre-treatment brain activity in psychiatric patients. However, the actual clinical utility of such tests remains to be shown.
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Affiliation(s)
- Karleyton C Evans
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
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31
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Abstract
Analgesics and topical agents ineffectively inhibit painful erections after penile and urethral surgery. Oral ketoconazole reversibly inhibits testosterone production and has been used empirically at our institution to decrease postoperative erections. We performed a retrospective review of 38 patients who had undergone penile and urethral reconstructive surgery. In all, 31 patients received 400 mg of ketoconazole three times daily for 10-14 days postoperatively (the study group) and seven patients did not receive ketoconazole (the control group). The incidence of postoperative erections, pain, side effects, surgical outcomes and patient satisfaction in each group were compared. Of the control group, 71% reported erections in the immediate postoperative period, and all these patients reported the erections were painful. Only 23% of the patient taking ketoconazole reported postoperative erections, and only 16% reported the erections were painful. We conclude that ketoconazole effectively prevents painful postoperative erections with minimal side effects.
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Affiliation(s)
- K C Evans
- Urology Service, Madigan Army Medical Center, Tacoma, Washington 98431, USA
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Evans KC, Evans RG, Royal R, Esterman AJ, James SL. Effect of caesarean section on breast milk transfer to the normal term newborn over the first week of life. Arch Dis Child Fetal Neonatal Ed 2003; 88:F380-2. [PMID: 12937041 PMCID: PMC1721616 DOI: 10.1136/fn.88.5.f380] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To determine the effect of caesarean section on breast milk transfer (BMT) to the normal term infant over the first week of life. METHOD A sample of 88 healthy nursing mothers who had a normal vaginal delivery, and 97 mothers who had a caesarean section were recruited from a teaching hospital. Mothers and midwives were instructed to weigh the infants before and after each feed throughout the study period using calibrated portable electronic scales. RESULTS The volume of milk transferred to infants born by caesarean section was significantly less than that transferred to infants born by normal vaginal delivery on days 2 to 5 (p < 0.05), but by day 6 there was no difference between the two groups (p = 0.08). The difference could not be explained by any of the maternal and infant variables measured. Birth weight was regained by day 6 in 40% of infants born vaginally compared with 20% in those born by caesarean section. CONCLUSION There is a lag in the profile of the daily volume of breast milk transferred to infants delivered by caesarean section compared with those born by normal vaginal delivery. This study also challenges the widely followed schedules of milk volumes considered to be suitable for the term infant, which appear to be excessive, at least for the first four to five days post partum.
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Affiliation(s)
- K C Evans
- Women and Children at Flinders, Flinders Medical Centre, Bedford Park, South Australia 5042
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Abstract
To investigate the functional neuroanatomy of voluntary respiratory control, blood O2 level-dependent functional magnetic resonance imaging was performed in six healthy right-handed individuals during voluntary hyperpnea. Functional images of the whole brain were acquired during 30-s periods of spontaneous breathing alternated with 30-s periods of isocapnic hyperpnea [spontaneous vs. voluntary: tidal volume = 0.5 +/- 0.01 vs. 1.3 +/- 0.1 (SE) liters and breath duration = 4.0 +/- 0.4 vs. 3.2 +/- 0.4 (SE) s]. For the group, voluntary hyperpnea was associated with significant (P < 0.05, corrected for multiple comparisons) neural activity bilaterally in the primary sensory and motor cortices, supplementary motor area, cerebellum, thalamus, caudate nucleus, and globus pallidum. Significant increases in activity were also identified in the medulla (corrected for multiple comparisons on the basis of a small volume correction for a priori region of interest) in a superior dorsal position (P = 0.012). Activity within the medulla suggests that the brain stem respiratory centers may have a role in mediating the voluntary control of breathing in humans.
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Affiliation(s)
- L C McKay
- National Heart and Lung Instiute, Imperial College London, London W6 8RP, United Kingdom
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Evans KC, Banzett RB, Adams L, McKay L, Frackowiak RSJ, Corfield DR. BOLD fMRI identifies limbic, paralimbic, and cerebellar activation during air hunger. J Neurophysiol 2002; 88:1500-11. [PMID: 12205170 DOI: 10.1152/jn.2002.88.3.1500] [Citation(s) in RCA: 269] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Air hunger (uncomfortable urge to breathe) is a component of dyspnea (shortness of breath). Three human H(2)(15)O positron emission tomography (PET) studies have identified activation of phylogenetically ancient structures in limbic and paralimbic regions during dyspnea. Other studies have shown activation of these structures during other sensations that alert the organism to urgent homeostatic imbalance: pain, thirst, and hunger for food. We employed blood oxygen level dependent (BOLD) functional magnetic resonance imaging (fMRI) to examine activation during air hunger. fMRI conferred several advantages over PET: enhanced signal-to-noise, greater spatial resolution, and lack of ionizing radiation, enabling a greater number of trials in each subject. Six healthy men and women were mechanically ventilated at 12-14 breaths/min. The primary experiment was conducted at mean end-tidal PCO(2) of 41 Torr. Moderate to severe air hunger was evoked during 42-s epochs of lower tidal volume (mean = 0.75 L). Subjects described the sensation as "like breath-hold," "urge to breathe," and "starved for air." In the baseline condition, air hunger was consistently relieved by epochs of higher tidal volume (mean = 1.47 L). A control experiment in the same subjects under a background of mild hypocapnia (mean end-tidal PCO(2) = 33 Torr) employed similar tidal volumes but did not evoke air hunger, controlling for stimulus variables not related to dyspnea. During each experiment, we maintained constant end-tidal PCO(2) and PO(2) to avoid systematic changes in global cerebral blood flow. Whole-brain images were acquired every 5 s (T2*, 56 slices, voxel resolution 3 x 3 x 3 mm). Activations associated with air hunger were determined using voxel-based interaction analysis of covariance that compared data between primary and control experiments (SPM99). We detected activations not seen in the earlier PET study using a similar air hunger stimulus (Banzett et al. 2000). Limbic and paralimbic loci activated in the present study were within anterior insula (seen in all 3 published studies of dyspnea), anterior cingulate, operculum, cerebellum, amygdala, thalamus, and basal ganglia. Elements of frontoparietal attentional networks were also identified. The consistency of anterior insular activation across subjects in this study and across published studies suggests that the insula is essential to dyspnea perception, although present data suggest that the insula acts in concert with a larger neural network.
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Affiliation(s)
- Karleyton C Evans
- Physiology Program, Harvard School of Public Health, Boston, Massachusetts 02115, USA
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Evans KC, Shea SA, Saykin AJ. Functional MRI localisation of central nervous system regions associated with volitional inspiration in humans. J Physiol 1999; 520 Pt 2:383-92. [PMID: 10523407 PMCID: PMC2269603 DOI: 10.1111/j.1469-7793.1999.00383.x] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/1999] [Accepted: 07/27/1999] [Indexed: 11/28/2022] Open
Abstract
1. Functional magnetic resonance imaging (fMRI) provides a means of studying neuronal circuits that control respiratory muscles in humans with better spatial and temporal resolution than in previous positron emission tomography (PET) studies. 2. Whole brain blood oxygenation level-dependent (BOLD) changes determined by fMRI were used to identify areas of neuronal activation associated with volitional inspiration in five healthy men. Four series of scans of each subject were acquired during voluntary breathing (active task) and mechanical ventilation (passive task). Ventilation and end-tidal PCO2 were similar between tasks. Scan data were re-aligned to correct for movement artefacts and cross-referenced breath by breath to respiratory data for selective averaging of inspiratory and expiratory images. 3. Group analysis identified significant increases in the fMRI signal with volitional inspiration in the superior motor cortex, premotor cortex and supplementary motor area at loci similar to those detected in earlier studies that used PET. Additional regions activated by volitional inspiration included inferolateral sensorimotor cortex, prefrontal cortex and striatum (these foci were only revealed by PET under significant inspiratory load). 4. This study represents the first synchronised breath-by-breath analysis of respiratory-related neuronal activity with whole brain imaging in humans. Temporal resolution is sufficient to distinguish individual breaths at a normal breathing frequency.
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Affiliation(s)
- K C Evans
- Brain Imaging Laboratory, Departments of Psychiatry and Radiology, Dartmouth-Hitchcock Medical Center, 1 Medical Center Drive, Lebanon, NH 03756, USA
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36
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Abstract
Hypercapnia evokes an uncomfortable sensation, termed 'air hunger'. We examined the relationship between PETCO2 and ratings of air hunger intensity under three conditions in 16 subjects: 1) mechanical ventilation with hyperoxic gas mixtures at fixed frequency and tidal volume (twice resting ventilation), 2) the same mechanical ventilation, but with hypoxic gas mixture, 3) spontaneous breathing with hyperoxic gas mixture. In each case, PETCO2 was varied randomly among several levels, each held for 5 min. During hyperoxic mechanical ventilation, the mean threshold for air hunger sensation was 43 Torr, i.e., 4 Torr above resting PETCO2; intolerable air hunger was evoked by 50 Torr. The threshold and tolerable levels of PETCO2 varied among individuals, but were not well correlated with their ventilatory responses to CO2. Hypoxia (PETO2 60-75 Torr) shifted the PETCO2 at both threshold and tolerance down by only 2 Torr. Breathing greatly reduced the air hunger experienced at any given PETCO2 (threshold increased 5 Torr, and sensitivity decreased 50%).
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Affiliation(s)
- R B Banzett
- Physiology Program, Harvard School of Public Health, Boston, MA 02115, USA
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Evans KC, Berger EP, Cho CG, Weisgraber KH, Lansbury PT. Apolipoprotein E is a kinetic but not a thermodynamic inhibitor of amyloid formation: implications for the pathogenesis and treatment of Alzheimer disease. Proc Natl Acad Sci U S A 1995; 92:763-7. [PMID: 7846048 PMCID: PMC42700 DOI: 10.1073/pnas.92.3.763] [Citation(s) in RCA: 233] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The apolipoprotein E4 (APOE4) allele is associated with an early age of onset of the nonfamilial form of Alzheimer disease (AD) and with increased beta protein amyloid deposition in the brain. These two observations may both arise from an effect of the apoE family of proteins on the rate of in vivo amyloidogenesis. We report here that apoE3, the common apoE isoform, is an in vitro amyloid nucleation inhibitor at physiological concentrations. A significant delay in the onset of amyloid fibril formation by the beta-amyloid protein of AD (beta 1-40) was observed at a low apoE3 concentration (40 nM), corresponding to an apoE3/beta protein molar ratio of 1:1000. The inhibitory activity of a proteolytic fragment of apoE3, containing the N-terminal 191 amino acids, is comparable to the native protein, whereas the C-terminal fragment has no activity. ApoE4 is equipotent or slightly less potent than apoE3, which may be due to its inability to form a disulfide dimer, since the apoE3 dimer is a significantly more potent nucleation inhibitor than apoE4. Neither apoE3 nor apoE4 inhibits the seeded growth of amyloid or affects the solubility or structure of the amyloid fibrils, indicating that apoE is not a thermodynamic amyloid inhibitor. We propose that the linkage between the APOE4 allele and AD reflects the reduced ability of APOE4 homozygotes to suppress in vivo amyloid formation.
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Affiliation(s)
- K C Evans
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge 02139
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Szlyk PC, Evans KC, Sils IV. Validation of a modified one-step rebreathing technique for measuring exercise cardiac output. Aviat Space Environ Med 1988; 59:1193-7. [PMID: 3149188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A modification of the Farhi one-step rebreathing technique (1) is described for determining submaximal exercise cardiac output (Q). Factors critical in the estimation of Q are initial rebreathing bag volume and constant bag volume during the maneuver. By substituting a high flow rate analyzer (500 ml.min-1) for the recommended low flow rate mass spectrometer (60 ml.min-1), adding a recirculation circuit from the outlet of the analyzer to an inlet at the base of the rebreathing bag, and reducing the length of sample tubing to the analyzer, we were able to recirculate the subject's expired gas and achieve no loss of bag volume. No statistically significant differences in estimate of cardiac output were noted between the mass spectrometer and LB-2 analyzer with recirculation circuit during submaximal cycling. Heart rate and oxygen uptake were highly correlated with cardiac output and agreed well with the literature, irrespective of the CO2 analyzer system used. A unique feature of our method is that the subject's tidal volume is measured prior to the maneuver and then used as the initial rebreathing bag volume. Varying the bag volume by +/- 0.2 L from the tidal volume had no significant effect on the estimate of cardiac output during exercise. Now quick, reliable, and noninvasive measurements of cardiac output are feasible in subjects--not only in the laboratory but also in the field where a mass spectrometer is not readily portable.
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Affiliation(s)
- P C Szlyk
- Heart Research Division, U.S. Army Institute of Environmental Medicine, Natick, MA 01760-5007
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