Journal Article

Prodromal characteristics of dementia with Lewy bodies: baseline results of the MEMENTO memory clinics nationwide cohort

Moreaud, Olivier, Botzung, Anne, Ceccaldi, Mathieu, Habert, Marie-Odile, Dufouil, Carole, Belin, Catherine, Chupin, Marie, de Sousa, Paulo Loureiro, Gabelle, Audrey, David, Renaud, Krolak-Salmon, Pierre, Namer, Izzie, Mangin, Jean-François, Harston, Sandrine, Chene, Geneviève, Bouteloup, Vincent, Wallon, David, Bousiges, Olivier, Dartigues, Jean-François, Demuynck, Catherine, Pasquier, Florence, Cretin, Benjamin, Blanc, Frederic, Sauvée, Mathilde, Verny, Marc, Philippi, Nathalie, Paquet, Claire, Kremer, Stéphane, Albasser, Timothée, Fischer, Clara, Muller, Candice

2022

Overview

Background Isolated subjective cognitive impairment (SCI) and mild cognitive impairment (MCI) are the prodromal phases of dementia with Lewy bodies (DLB). MEMENTO is a nationwide study of patients with SCI and MCI with clinic, neuropsychology, biology, and brain imaging data. We aimed to compare SCI and MCI patients with symptoms of prodromal DLB to others in this study at baseline. Methods Participants of the French MEMENTO cohort study were recruited for either SCI or MCI. Among them, 892 were included in the Lewy sub-study, designed to search specifically for symptoms of DLB. Probable prodromal DLB diagnosis (pro-DLB group) was done using a two-criteria cutoff score among the four core clinical features of DLB. This Pro-DLB group was compared to two other groups at baseline: one without any core symptoms (NS group) and the one with one core symptom (1S group). A comprehensive cognitive battery, questionnaires on behavior, neurovegetative and neurosensory symptoms, brain 3D volumetric MRI, CSF, FDG PET, and amyloid PET were done. Results The pro-DLB group comprised 148 patients (16.6%). This group showed more multidomain (59.8%) MCI with slower processing speed and a higher proportion of patients with depression, anxiety, apathy, constipation, rhinorrhea, sicca syndrome, and photophobia, compared to the NS group. The pro-DLB group had isolated lower P-Tau in the CSF (not significant after adjustments for confounders) and on brain MRI widening of sulci including fronto-insular, occipital, and olfactory sulci (FDR corrected), when compared to the NS group. Evolution to dementia was not different between the three groups over a median follow-up of 2.6 years. Conclusions Patients with symptoms of prodromal DLB are cognitively slower, with more behavioral disorders, autonomic symptoms, and photophobia. The occipital, fronto-insular, and olfactory bulb involvement on brain MRI was consistent with symptoms and known neuropathology. The next step will be to study the clinical, biological, and imaging evolution of these patients. Trial registration Clinicaltrials.gov , NCT01926249

• Publisher: BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
• Subject: Akinesia / Alzheimer Disease / Alzheimer Disease - diagnosis / Alzheimer's disease / Biomarkers / Biomedical and Life Sciences / Biomedicine / Caregivers / Clinics / Cognitive ability / Cognitive Dysfunction / Cognitive Dysfunction - diagnostic imaging / Cognitive science / Cohort Studies / Constipation / Dementia / Dementia with Lewy bodies / Diagnosis / Erectile dysfunction / Executive function / Geriatric Psychiatry / Geriatrics/Gerontology / Hallucinations / Human health and pathology / Humans / Lewy Body Disease / Lewy Body Disease - diagnostic imaging / Life Sciences / Medical imaging / Memory / Mild cognitive impairment / Mild neurocognitive impairment / Neuroimaging / Neurology / Neuropsychology / Neuroscience / Neurosciences / Parkinson's disease / Patients / Photophobia / Plasma / Prodromal / Prodromal Symptoms / Questionnaires / Subjective cognitive impairment