Emily D. Clark, Jamie Perin, Nathan Herrmann, Olga Brawman-Mintzer, Krista L. Lanctôt, Alan J. Lerner, Jacobo Mintzer, Prasad R. Padala, Paul B. Rosenberg, Susie Sami, David M. Shade, Christopher H. van Dyck, Anton P. Porsteinsson, for the ADMET-2 Study Group
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Caregiver scores were compared from baseline to month 6 in 199 participants receiving methylphenidate (20 mg/day) or placebo regarding the presence or absence of individual neuropsychiatric symptoms, emergence of new symptoms, and individual domain scores.</p>\n </section>\n \n <section>\n \n <h3> RESULTS</h3>\n \n <p>No clinically meaningful improvement was observed in any NPI domain, excluding apathy, in participants treated with methylphenidate compared to placebo after 6 months. A statistical difference between groups was appreciated in the domains of elation/euphoria (<i>P</i> = 0.044) and appetite/eating disorders (<i>P</i> = 0.014); however, these findings were not considered significant.</p>\n </section>\n \n <section>\n \n <h3> DISCUSSION</h3>\n \n <p>Methylphenidate is a selective agent for symptoms of apathy in patients with AD with no meaningful impact on other NPS. 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Effects of methylphenidate on neuropsychiatric symptoms in Alzheimer's disease: Evidence from the ADMET 2 study
INTRODUCTION
Methylphenidate has been shown to improve apathy in patients with Alzheimer's disease (AD). The authors evaluated the impact of methylphenidate on neuropsychiatric symptoms (NPS) of AD, excluding apathy, using data from the Apathy in Dementia Methylphenidate Trial 2 (ADMET 2) study.
METHODS
A secondary analysis was conducted on data from the ADMET 2 study to determine the effect of methylphenidate on Neuropsychiatric Inventory (NPI) scores outside of apathy. Caregiver scores were compared from baseline to month 6 in 199 participants receiving methylphenidate (20 mg/day) or placebo regarding the presence or absence of individual neuropsychiatric symptoms, emergence of new symptoms, and individual domain scores.
RESULTS
No clinically meaningful improvement was observed in any NPI domain, excluding apathy, in participants treated with methylphenidate compared to placebo after 6 months. A statistical difference between groups was appreciated in the domains of elation/euphoria (P = 0.044) and appetite/eating disorders (P = 0.014); however, these findings were not considered significant.
DISCUSSION
Methylphenidate is a selective agent for symptoms of apathy in patients with AD with no meaningful impact on other NPS. Findings from this secondary analysis are considered exploratory and multiple limitations should be considered when interpreting these results, including small sample size and use of a single questionnaire.
HIGHLIGHTS
Methylphenidate was not associated with significant improvement on the Neuropsychiatric Inventory in domains outside of apathy.
Methylphenidate did not show a statistically significant emergence of new neuropsychiatric symptoms (NPS) throughout the 6-month treatment period compared to placebo.
Methylphenidate appears to be a highly selective agent for apathy in Alzheimer's disease, potentially supporting catecholaminergic dysfunction as the driving force behind this presentation of symptoms.
期刊介绍:
Alzheimer''s & Dementia: Translational Research & Clinical Interventions (TRCI) is a peer-reviewed, open access,journal from the Alzheimer''s Association®. The journal seeks to bridge the full scope of explorations between basic research on drug discovery and clinical studies, validating putative therapies for aging-related chronic brain conditions that affect cognition, motor functions, and other behavioral or clinical symptoms associated with all forms dementia and Alzheimer''s disease. The journal will publish findings from diverse domains of research and disciplines to accelerate the conversion of abstract facts into practical knowledge: specifically, to translate what is learned at the bench into bedside applications. The journal seeks to publish articles that go beyond a singular emphasis on either basic drug discovery research or clinical research. Rather, an important theme of articles will be the linkages between and among the various discrete steps in the complex continuum of therapy development. For rapid communication among a multidisciplinary research audience involving the range of therapeutic interventions, TRCI will consider only original contributions that include feature length research articles, systematic reviews, meta-analyses, brief reports, narrative reviews, commentaries, letters, perspectives, and research news that would advance wide range of interventions to ameliorate symptoms or alter the progression of chronic neurocognitive disorders such as dementia and Alzheimer''s disease. The journal will publish on topics related to medicine, geriatrics, neuroscience, neurophysiology, neurology, psychiatry, clinical psychology, bioinformatics, pharmaco-genetics, regulatory issues, health economics, pharmacoeconomics, and public health policy as these apply to preclinical and clinical research on therapeutics.