Retinal Neurodegenerative Signs in Alzheimer's Diseases (SIGNAL)
A few studies suggest that patients suffering from neurodegenerative diseases (such a multiple sclerosis or Alzheimer's disease (AD)) show decreased thickness of the retinal nerve fiber layer (RNFL), indicating axonal degeneration. High-definition spectral domain optical coherence tomography (SD-OCT), performed without radiation in a few seconds per eye, offers a precise and standardized estimation of this parameter, which could constitute a biomarker for cerebral axonal degeneration. These RNFL deficits might even be the earliest sign of AD, prior to damage of the hippocampal region that impacts memory.
Besides, some associations of AD with some degenerative diseases of the eye (glaucoma, microvascular abnormalities, age-related macular degeneration (AMD)) have also been reported.
It therefore seems interesting to determine whether RNFL thickness, and other ocular parameters, may give some indications for a better detection of AD and cognitive decline in the elderly.
調査の概要
研究の種類
入学 (実際)
段階
- 適用できない
連絡先と場所
研究場所
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Bordeaux、フランス、33000
- CHU bordeaux - Hopital Pellegrin
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
説明
Inclusion Criteria:
- Inclusion criteria for AD cases:
- Diagnosis of probable AD, defined according to the NINCDS-ARDRA criteria51
- Light to moderate severity of the disease, defined by a MMSE score >10 (global evaluation of cognition)
- Patient aged 50 years or more
- Patient benefiting from social insurance
Inclusion criteria for controls:
- Absence of suspicion of dementia, based on normal performance according to age and educational level at neuropsychological testing defined as:
- Free recall ≥17 and total recall ≥40 for the Free and Cued Selective Reminding Test (Grober and Buschke test 52) MMSE ≥ norm for age and educational level (defined by mean - 1 SD)
- Isaac's set test ≥ norm for age and educational level (defined by mean - 1 SD)
- Matched to age and gender of the cases
- Patient benefiting from social insurance
Exclusion Criteria:
Exclusion criteria for all patients :
- History of Parkinson's disease or other neurodegenerative disorder
- History of Horton's disease
- History of inflammatory neuropathies (in particular Devic's disease, multiple sclerosis)
- History of vascular ischemic neuropathies and chronic intracranial hypertension
- History of pituitary tumors
- Presence of diseases (systemic and/or ocular diseases) or behavioural or cognitive symptoms incompatible with eye examination
- Known diabetes
- Person under tutorship or curatorship, person unable to express consent
Additional exclusion criteria for AD cases:
- Dementia of other cause than AD
- Severe AD, defined by MMSE score ≤ 10
Additional exclusion criteria for controls:
- Presence of dementia, of whatever cause
研究計画
研究はどのように設計されていますか？
デザインの詳細
- 主な目的：診断
- 割り当て：非ランダム化
- 介入モデル：並列代入
- マスキング：なし（オープンラベル）
武器と介入
参加者グループ / アーム |
介入・治療 |
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アクティブコンパレータ：コントロール
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The following examinations will be performed, after pupil dilation:
The following informations will be collected through a standardized questionnaire, administered face-to-face during the inclusion visit, or at the moment of the verification of eligibility criteria:
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実験的：アルツハイマー病
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The following examinations will be performed, after pupil dilation:
The following informations will be collected through a standardized questionnaire, administered face-to-face during the inclusion visit, or at the moment of the verification of eligibility criteria:
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この研究は何を測定していますか？
主要な結果の測定
結果測定 |
時間枠 |
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RNFL thickness measured on a peri-papillary scan of SD-OCT examination.
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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二次結果の測定
結果測定 |
時間枠 |
|---|---|
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Glaucomatous optic nerve damage observed on colour photographs (cup/disc ratio)
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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Retinal microvascular abnormalities (microaneurysms, micro-hemorrhage, cotton wool spots, arteriovenous nicking), observed on retinal colour photography
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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Macular abnormalities observed on retinal colour photographs (drusen, pigmentary abnormalities, neovascular AMD, atrophic AMD, other retinal diseases)
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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Macular abnormalities observed on macular scans in SD-OCT (drusen, pigmentary abnormalities, neovascular AMD, atrophic AMD, epiretinal membranes, other retinal diseases).
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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Macular abnormalities observed in autofluorescence imaging (increased autofluorescence, decreased autofluorescence, reticular drusen, atrophic AMD, other abnormalities)
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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Macular and peripheral abnormalities diagnosed in wide-field retinal imaging
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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Retinal blood flow velocity (RFI)
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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Intraocular pressure
時間枠：inclusion visit (day0)
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inclusion visit (day0)
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axial length
時間枠：inclusion visit (day 0)
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inclusion visit (day 0)
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協力者と研究者
捜査官
- 主任研究者：Jean-François KOROBELNIK, Pr、University Hospital, Bordeaux, France
- スタディチェア：Delcourt Cécile, Dr、ISPED, bordeaux, France
出版物と役立つリンク
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (推定)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。