Sagittal and axial views of positron emission tomographic (PET) scans of representative patients. The vertical bars indicate the range of semiautomated quantitative analysis of the ratio of cortical to cerebellar signal (SUVr) scores. The maximum color (red) corresponds to an SUVr of approximately 2.2. The 4G8 immunohistochemistry shows precuneus gray matter with aggregated β-amyloid (red) using a

β-アミロイド斑を検知するPETスキャン造影剤である、Florbetapir 、これが、アルツハイマー病発症予測に役立つ Clark C, et al "Use of florbetapir-PET for imaging for beta-amyloid pathology" JAMA 2011; 305: 275-283. ピンシルバニア大学とAvid Radiopharmaceuticalsでかいハツされた、新しい18F 標識トレーサーで、βアミロイド会合体へ結合するが、CNS受容体やeurofibrillary tangleのような他の神経病態ターゲットへの結合しない。 研究では2つのコホートに分けて、35名の余命の少ない対象者（原文に書いてるからしょうがない）と74名の若年健康者で、10 mCiのflorbetapirを注入、30-50分後、10分間のPET検査 15/29（52

ベースライン認知症無しの老人の前向きコホート研究で、Yaffeらは、1年次の低血中β-アミロイド42/40が9年後の認知症減少と関連することを見いだした。 Bretelerは、これが認知機能減弱と、アルツハイマー病のバイオマーカーとして有望か議論 Association of Plasma β-Amyloid Level and Cognitive Reserve With Subsequent Cognitive Decline JAMA. 2011;305(3):261-266. 髄液では以下の報告などがあるようだ Prediction of Alzheimer’s Disease Using the CSF Aβ42/Aβ40 Ratio in Patients with Mild Cognitive Impairment Dementia and geriatric cogniti

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Brain regions in which a lower cerebral glucose metabolic rate was associated with greater insulin resistance as indexed by the homeostasis model assessment of insulin resistance. Regions in which the strongest negative associations were observed are represented in yellow. The vertical bar shows image color vs Z score scale. Image views are labeled as follows: R, right; L, left; Lat, lateral; Sup,

抗体に結合しうる、数千もの合成分子、poptoidを用いた "high throughput" screeningで、アルツハイマー病患者に、健康対照者や健常対照者に３倍ものIgGの捕捉されたのは、合成分子数千のうち２つ Identification of Candidate IgG Biomarkers for Alzheimer's Disease via Combinatorial Library Screening Cell, Volume 144, Issue 1, 132-142, 7 January 2011 血液検査でアルツハイマー病患者の診断・スクリーニングができる可能性が出てきた。そして、アルツハイマー病の病因・病態の研究にも。 抗原を自然合成して、それに反応する免疫グロブリンの反応で特異的抗体を見出す。そういう手法。 有用性の一例として、アルツハイマー病における２つの

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アルツハイマー病の根本原因は、アミロイドβ蛋白過剰産生というより、排除・除去メカニズムの問題かもしれないという、ワシントン大学の　Randall J. Bateman, MDの報告 Decreased Clearance of CNS β-Amyloid in Alzheimer’s Disease Science DOI: 10.1126/science.1197623 12名の60歳以降早期アルツハイマー病で他の疾患なしと診断された対象 (Clinical Dementia Rating scores of 0.5 to 1.0) 、年齢77歳平均 2名がapolipoprotein E ε４alleleで4名がheterozygous・ε-3 allele 対照群が若干若く71歳平均で、 apo E ε-4 homozygousは持たず6名がheterzygosity 腰椎穿刺間、ア

Abstract Aims: Our purpose was to study the link between serum brain-derived neurotrophic factor (BDNF) levels and neuropsychological functioning through the Texas Alzheimer’s Research Consortium cohort. Methods: A total of 399 participants [probable Alzheimer’s disease (AD) n = 198, controls n = 201] were available for analysis. The BDNF levels were assayed via multiplex immunoassay. Regression a

1Departments of 1Geriatrics and 2Psychiatry, University of Geneva School of Medicine, Geneva and 3Division of Old Age Psychiatry, University of Lausanne School of Medicine, Lausanne, Switzerland

Abstract Background: The Ε4 allele of apolipoprotein E (APOE) is associated with Alzheimer’s disease (AD). However, attributable risk due to APOE4 varies by region and by race/ethnicity. Methods: A literature review and meta-analysis were conducted to estimate the prevalence of APOE4 by geographic area among AD patients. Results: Although estimates varied significantly by study design and case def

日経メディカル運営の「日本最大級」医師求人メディア。転職支援会社が扱う求人情報のほか、医療機関からの直接求人情報も掲載！