Frontotemporal Lobar Degeneration Epidemiology, Pathophysiology, Diagnosis and Management

被引:278
作者
Rabinovici, Gil D. [1 ]
Miller, Bruce L. [1 ]
机构
[1] Univ Calif San Francisco, Memory & Aging Ctr, Dept Neurol, San Francisco, CA 94143 USA
关键词
AMYOTROPHIC-LATERAL-SCLEROSIS; TAR-DNA-BINDING; PROGRESSIVE SUPRANUCLEAR PALSY; LACKING DISTINCTIVE HISTOLOGY; PROGRANULIN MUTATION CARRIERS; VOXEL-BASED MORPHOMETRY; C-TERMINAL FRAGMENTS; NON-ALZHEIMER TYPE; CORTICOBASAL DEGENERATION; SEMANTIC DEMENTIA;
D O I
10.2165/11533100-000000000-00000
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Frontotemporal lobar degeneration (FTLD) is a clinically and pathologically heterogeneous syndrome, characterized by progressive decline in behaviour or language associated with degeneration of the frontal and anterior temporal lobes. While the seminal cases were described at the turn of the 20th century, FTLD has only recently been appreciated as a leading cause of dementia, particularly in patients presenting before the age of 65 years. Three distinct clinical variants of FTLD have been described: (i) behavioural-variant frontotemporal dementia, characterized by changes in behaviour and personality in association with frontal-predominant cortical degeneration; (ii) semantic dementia, a syndrome of progressive loss of knowledge about words and objects associated with anterior temporal neuronal loss; and (iii) progressive nonfluent aphasia, characterized by effortful language output, loss of grammar and motor speech deficits in the setting of left perisylvian cortical atrophy. The majority of pathologies associated with FTLD clinical syndromes include either tau-positive (FTLD-TAU) or TAR DNA-binding protein 43 (TDP-43)-positive (FTLD-TDP) inclusion bodies. FTLD overlaps clinically and pathologically with the atypical parkinsonian disorders corticobasal degeneration and progressive supranuclear palsy, and with amyotrophic lateral sclerosis. The majority of familial FTLD cases are caused by mutations in the genes encoding microtubule-associated protein tau (leading to FTLD-TAU) or progranulin (leading to FTLD-TDP). The clinical and pathological heterogeneity of FTLD poses a significant diagnostic challenge, and in vivo prediction of underlying histopathology can be significantly improved by supplementing the clinical evaluation with genetic tests and emerging biological markers. Current pharmacotherapy for FTLD focuses on manipulating serotonergic or dopaminergic neurotransmitter systems to ameliorate behavioural or motor symptoms. However, recent advances in FTLD genetics and molecular pathology make the prospect of biologically driven, disease-specific therapies for FTLD seem closer than ever.
引用
收藏
页码:375 / 398
页数:24
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