Cognition and the course of prodromal Parkinson's disease.
Cognition and the course of prodromal Parkinson's disease.
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DOI:
10.1002/mds.27189
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发表时间:
2017-11
期刊:
影响因子:
--
通讯作者:
PARS Investigators
中科院分区:
文献类型:
--
作者:
Weintraub D;Chahine LM;Hawkins KA;Siderowf A;Eberly S;Oakes D;Seibyl J;Stern MB;Marek K;Jennings D;PARS Investigators
Prospective data on cognition in prodromal Parkinson’s disease (PD) are limited. To assess in prodromal PD if (1) baseline cognition predicts conversion to clinical PD, (2) baseline dopamine transporter (DAT) binding predicts longitudinal changes in cognition, and (3) impaired olfaction predicts future cognitive decline. Prodromal participants were 136 hyposmic individuals enrolled in the Parkinson Associated Risk Study study. We examined baseline neuropsychological test performance in PD converters vs. non-converters and the association between baseline DAT binding and change in cognition. An additional 73 normosmic individuals were included in analyses of the relationship between hyposmia and cognitive decline. In prodromal participants, baseline cognitive scores did not significantly predict conversion, but converters performed numerically worse on 5 of the 6 cognitive domains assessed, with the greatest differences in executive function/working memory (0.68 SD lower) and global cognition (0.64 SD lower). Lower baseline DAT binding predicted greater future decline in processing speed/attention (p=0.02). Hyposmia predicted greater future decline in language (p=0.005) and memory abilities (p=0.01). Given hyposmia in the general population predicts cognitive decline, the role of cognition in predicting conversion in prodromal PD needs to be assessed in large cohorts followed long-term. The dopamine system may be associated with changes in processing speed/attention in individuals at-risk for PD.
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