Dementia Clinical Trial
Official title:
Dopaminergic Therapy for Frontotemporal Dementia Patients: an Interventional, Multi-site, Randomized, Double-blind, Placebo-controlled Study on the Efficacy and Safety of RTG Treatment in Patients With Behavioral FTD
This is a phase IIa 24-week randomized, double-blind, placebo-controlled study. The study is designed to evaluate the efficacy and safety of Rotigotine (RTG) transdermal administration at the dosage of 4 mg or 6 mg per day versus Placebo (PLC) in newly diagnosed behavioural Frontotemporal Dementia (bvFTD) patients. 75 patients with a diagnosis of probable bvFTD will be randomly allocated to the 3 treatment arms (RTG 4mg/day, RTG 6mg/day or PLC), with 25 patients per group. Clinical and neurophysiological measurements and brain metabolism via FDG-PET will be collected before and after drug administration.
The current study has the ambition to provide the first-time evidence of the clinical impact, at cognitive and behavioral level, of a dopamine-based treatment in newly diagnosed bvFTD patients. To evaluate the cognitive and behavioral effects of RTG administration, the investigators will employ a battery of tests assessing global cognition, executive functions, language and behavior. The battery will include: Neuropsychiatric Inventory (NPI) and Frontal Behavioral Inventory (FBI) to evaluate behavior, Clinical Dementia Rating Scale-Frontotemporal Dementia Sum Of Boxes (CDR-FTD SOB) to evaluate global disease severity, Frontal Assessment Battery (FAB) to evaluate frontal functions, Screening for aphasia in Neurodegeneration (SAND) to evaluate language functions, Alzheimer's Disease Cooperative Study - Activities of Daily Living (ADCS-ADL) to evaluate activities of daily living, the Addenbrooke's Cognitive Examination Revised (ACE-R) to evaluate global cognition. To evaluate changes in brain metabolism the investigators will perform 2 FDG-PET scans before starting the treatment and at the end of week 24. Neurophysiological investigations will be performed to identify quantifiable biomarkers underlying the effects induced by dopamine agonist on the bvFTD brain. In particular, the investigators will use multimodal neurophysiological tools based on TMS-EMG and TMS-EEG. More specifically, different paired-pulse TMS protocols will be used to evaluate in vivo the activity of different intracortical circuits, such as short intracortical inhibition (SICI), reflecting GABA(A)-ergic neurotransmission; long intracortical inhibition (LICI), evaluating GABA(B)-ergic neurotransmission; short afferent inhibition (SAI) evaluating cholinergic neurotransmission and intermittent theta burst stimulation (iTBS) probing cortical plasticity mechanisms, such as long- term potentiation (LTP). The effects of these protocols will be evaluated by means of motor-evoked potentials, recordable with EMG. TMS-EEG will be used to measure the effects of RTG on frontal and parieto-temporal cortical activity, in terms of cortical excitability, oscillatory activity and connectivity. The investigators will evaluate the effects of the DA drug on brain activity and plasticity by analyzing MEPs and TEPs before and after the treatment. The investigators expect to find modulations in the high EEG frequencies (beta and gamma oscillatory activities) and/or in the indexes of cortical reactivity and plasticity (amplitude of TEPs and MEPs) that correlate with improvement in clinical assessment. ;
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