米国における鉛への曝露とアルツハイマー病および全因性認知症の発生率
medRxiv : the preprint server for health sciences
|September 2, 2025
まとめ
蓄積された鉛の暴露は,特に骨で,認知症とアルツハイマー病のリスクの増加と関連しています. 血中鉛濃度は,この大規模な前向きな研究で有意な関連性を示さなかった.
科学分野:
- 環境 健康
- 神経科学
- 流行病学
背景:
- 鉛の曝露と認知症のリスクとの関連が示唆されています
- この関連性を調査するヒトの研究は限られており,さらなる研究が必要である.
研究 の 目的:
- アルツハイマー病 (AD) と全因性認知症の発生率との関連を調査する.
- 強力な疫学的な洞察を得るために,全国的に代表的な,有望なコホートからデータを分析する.
主な方法:
- 国家保健栄養調査 (NHANES) -IIIおよび継続的なNHANESから14,000人以上のデータを利用した.
- 血中鉛濃度と 膝蓋骨と骨の鉛濃度が測定され 認知症発生率のメディケアと国家死亡指数と関連付けられています
- 雇用調査加重のコックス回帰で,危険比率 (HRs) と最大30年間の信頼区間 (CI) を推定する.
主要な成果:
- 連続したNHANESでは,骨格の鉛がアルツハイマー病 (HR=2. 96) と全因認知症 (HR=2. 15) と正の関連性を示した.
- NHANES- IIIではより弱い関連が観察され,血中鉛濃度は認知症と有意な関連を示さなかった.
- これらの発見は,累積的な鉛暴露,特に骨鉛を潜在的な危険因子として強調しています.
結論:
- 骨の鉛で示される累積的な鉛曝露は,アルツハイマー病を含む認知症の重要な危険因子です.
- これらのメカニズムを明らかにし,様々な集団でこれらの発見を確認するためにさらなる研究が必要である.
関連する概念動画
Alzheimer's Disease: Overview
666
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
666
Dementia
165
Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual....
The progression of dementia is generally gradual....
165
Psychoneuroimmunology: Diabetes and Cancer
62
Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...
62
Attention-Deficit/Hyperactivity Disorder
289
Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings....
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings....
289
Alzheimer's Disease: Treatment
260
Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
260
Disorders of the Nervous Tissue
1.6K
Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
Alzheimer's disease manifests as a gradual decline in memory and cognitive abilities, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Parkinson's disease arises from the...
Homeostatic Imbalances:
Alzheimer's disease manifests as a gradual decline in memory and cognitive abilities, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Parkinson's disease arises from the...
1.6K


