葉酸は血のホモシステインを低下させ,腎不全前の透析患者の内皮機能を改善しますか?
J Thambyrajah1, M J Landray, F J McGlynn
1Division of Medical Sciences (Cardiology), University of Birmingham Birmingham, UK. J.Thambyrajah@bham.ac.uk
Circulation
|August 23, 2000
まとめ
高用量の葉酸は,慢性腎不全患者の高ホモシステイン血症を低下させましたが,内皮機能を改善することはありませんでした. これは,葉酸が尿病における血管疾患の負担を軽減しない可能性があることを示唆しています.
科学分野:
- ネフロロジーは腎臓科
- 心血管医学は,心臓血管医学である.
- 栄養科学とは,栄養科学である.
背景:
- ハイパーホモキステン血症は,動脈硬化症と内皮機能不全に関連した独立した血管リスク因子です.
- 慢性腎不全 (CRF) は,ハイパーホモシステイン血症と動脈硬化症の両方に関連しています.
- CRF患者における血管疾患に対する葉酸の影響は不明である.
研究 の 目的:
- 透析前の慢性腎不全患者の内皮機能に対する葉酸の効果を調査する.
- 葉酸のサプリメントが,この患者集団における血管の健康マーカーを改善できるかどうかを判断する.
主な方法:
- 100人のCRF患者を対象とした前向きな,ダブルブラインド,プラセボ対照試験です.
- 患者は12週間にわたって毎日5mgの葉酸またはプラセボを投与されました.
- 内皮機能は,腕動脈の拡張,血清の窒素酸塩/窒素酸塩濃度,および血のフォン・ウィレブランド因子濃度によって評価されました.
主要な成果:
- 葉酸サプリメントは,プラセボと比較して葉酸のレベルを有意に上昇させ,ハイパーホモキステインエミアを減少させた.
- 葉酸依存の膨張,血清のニートリート/ニートレート,またはプラズマのフォン・ウィレブランド因子において,葉酸とプラセボ群の間で有意な差異は観察されなかった.
- 葉酸治療は高ホモキシステイン血症のレベルを低下させましたが,正常化させませんでした.
結論:
- 高用量の葉酸は,分析前のCRF患者におけるハイパーホモシスタインエミアを効果的に低下させますが,正常化させることはありません.
- 葉酸サプリメントは,このコホートにおける内皮機能を改善しませんでした.
- これらの発見は,葉酸治療が尿血症に関連する血管疾患の負担を軽減しない可能性があることを示唆しています.
関連する概念動画
Lipid-Lowering Drugs: Statins and Miscellaneous Agents
1.7K
Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
1.7K
Lipids: Dietary Sources and Requirements
2.5K
Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ...
2.5K
Cholesterol: Significance and Regulation
2.1K
Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Considering cholesterol and...
2.1K
Atherosclerosis III: Management
741
Management of atherosclerosis involves an integrated strategy encompassing pharmacological treatment, surgical interventions, lifestyle changes, and nutrition therapy to address the multifactorial nature of the disease.Pharmacological TherapyA cornerstone of atherosclerosis management is the use of pharmacological agents. Statins, such as atorvastatin, are pivotal in inhibiting HMG-CoA reductase, an enzyme that catalyzes an initial step in cholesterol synthesis in the liver. This reduction in...
741
Nephrotic Syndrome I : Introduction
1.2K
Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
1.2K
Nephrotic Syndrome III : Nursing Management
549
Nursing management for nephrotic syndrome adapts as the disease progresses, with strategies evolving to address advancing symptoms and complications.Early-Stage Management In the early stages, nursing interventions for nephrotic syndrome resemble those used in managing acute glomerulonephritis, focusing on symptom monitoring, fluid balance, and managing mild to moderate edema.Vital Signs: Regularly monitor blood pressure, pulse, respiratory rate, and temperature to promptly identify...
549


