Ketogenic

生酮
  • 文章类型: Journal Article
    这篇文章提出了一个解释偏头痛原因的假设,这表明电解质失衡,特别是感觉神经元的细胞外空间缺乏足够的钠,导致动作电位失败。作者认为,当钠通道无法启动动作电位时,就会触发偏头痛,阻止神经元之间的交流。这篇文章讨论了偏头痛大脑的进化观点,指出偏头痛患者的大脑过敏,感觉神经元连接更多,使它们对环境刺激更具反应性,并且需要更多的矿物质来增加感觉神经元的交流。由于葡萄糖通常用于降低血清高钠血症,因此,高碳水化合物饮食减少了大脑中使用的钠的可用性,导致电解质不平衡。低碳水化合物饮食,如生酮,低碳水化合物高脂肪(LCHF),和食肉动物(所有动物产品),可以通过减少/消除碳水化合物的摄入对偏头痛患者有益,从而增加钠的可用性。支持,提到了许多研究论文和一些轶事证据。文章最后提出了生活方式的改变,如饮食变化和钠摄入管理。这些将为偏头痛患者提供长期健康的代谢基础,帮助他们保持强大的营养依从性,并有助于持续正常的神经元功能和偏头痛自由生活。
    This article presents a hypothesis explaining the cause of migraines, suggesting that electrolyte imbalance, specifically a lack of sufficient sodium in the extracellular space of sensory neurons, leads to failed action potentials. The author argues that migraines are triggered when sodium channels fail to initiate action potentials, preventing communication between neurons. The article discusses the evolutionary perspective of the migraine brain, stating that migraineurs have a hypersensitive brain with more sensory neuronal connections, making them more reactive to environmental stimuli and in need of more minerals for the increased sensory neuronal communication. Since glucose is often used to reduce serum hypernatremia, it follows that a high carbohydrate diet reduces sodium availability for use in the brain, causing an electrolyte imbalance. Low carbohydrate diets, such as ketogenic, low carb-high fat (LCHF), and carnivore (all animal products), can be beneficial for migraineurs by reducing/eliminating carbohydrate intake, thereby increasing sodium availability. In support, many research papers and some anecdotal evidences are referred to. The article concludes by proposing lifestyle modifications, such as dietary changes and sodium intake management. These will provide migraineurs with a long-term healthy metabolic foundation helping them to maintain strong nutritional adherence and with that aiding continued proper neuronal functioning and migraine free life.
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  • 文章类型: Journal Article
    阿尔茨海默病(AD)的患病率正在增加,但对其认知障碍的有效治疗仍然非常有限。这项研究调查了通过饮食操纵产生酮体对早期AD引起的轻度认知障碍患者记忆的影响,并探讨了潜在的作用机制。
    我们进行了12周,平行组,生酮饮食的受控可行性试验,改良的阿特金斯饮食(MAD),与患有归因于AD的认知障碍的患者的对照饮食相比。我们进行了神经心理学评估,包括记忆测试,并在基线和干预12周后收集血液样本。我们对血浆样品进行非靶向脂质组学和靶向代谢组学分析以检测随时间的变化。
    共筛选了839个人,得到38名随机参与者,其中20人被分配接受MAD,18人被分配接受对照饮食。由于减员,对于主要终点,MAD组中只有13个和对照组中的9个进行了评估,两名参与者达到酮症水平,用于定义MAD依从性标准。与对照组相比,MAD组的记忆综合评分从基线的平均变化为1.37(95%CI:-0.87,4.90)分。干预对基线MAD变化的影响大小中等(Cohen'sD=0.57,95%CI:-0.67,1.33)。在15名参与者中(9名MAD,六个对照)评估脂质组学和代谢组学-脂质组学和代谢组学,从基线到12周,13种代谢物和10种脂质显示出显着变化,包括三酰基甘油(标签,50:5、52:5和52:6),鞘磷脂(SM,44:3、46:0、46:3和48:1),乙酰乙酸酯,脂肪酰基肉碱,甘油-3-磷酸,和羟基脂肪酸。
    在基线和第6周之间磨耗最大。在第6周保留的所有参与者完成研究。尽管按照先验定义的标准,遵守率很低,脂质组学和代谢组学分析显示,在随机化后12周时,MAD和对照参与者之间的循环脂质和代谢物相对于基线有显著变化,MAD参与者表现得更多,尽管不重要,提高记忆力。
    UNASSIGNED: Alzheimer\'s disease (AD) is increasing in prevalence, but effective treatments for its cognitive impairment remain severely limited. This study investigates the impact of ketone body production through dietary manipulation on memory in persons with mild cognitive impairment due to early AD and explores potential mechanisms of action.
    UNASSIGNED: We conducted a 12-week, parallel-group, controlled feasibility trial of a ketogenic diet, the modified Atkins diet (MAD), compared to a control diet in patients with cognitive impairments attributed to AD. We administered neuropsychological assessments, including memory tests, and collected blood samples at baseline and after 12 weeks of intervention. We performed untargeted lipidomic and targeted metabolomic analyses on plasma samples to detect changes over time.
    UNASSIGNED: A total of 839 individuals were screened to yield 38 randomized participants, with 20 assigned to receive MAD and 18 assigned to receive a control diet. Due to attrition, only 13 in the MAD arm and nine in the control arm were assessed for the primary endpoint, with two participants meeting ketosis levels used to define MAD adherence criteria. The average change from baseline in the Memory Composite Score was 1.37 (95% CI: -0.87, 4.90) points higher in the MAD group compared to the control group. The effect size of the intervention on baseline MAD change was moderate (Cohen\'s D = 0.57, 95% CI: -0.67, 1.33). In the 15 participants (nine MAD, six control) assessed for lipidomic and metabolomic-lipidomics and metabolomics, 13 metabolites and 10 lipids showed significant changes from baseline to 12 weeks, including triacylglycerols (TAGs, 50:5, 52:5, and 52:6), sphingomyelins (SM, 44:3, 46:0, 46:3, and 48:1), acetoacetate, fatty acylcarnitines, glycerol-3-phosphate, and hydroxy fatty acids.
    UNASSIGNED: Attrition was greatest between baseline and week 6. All participants retained at week 6 completed the study. Despite low rates of adherence by criteria defined a priori, lipidomic and metabolomic analyses indicate significant changes from baseline in circulating lipids and metabolites between MAD and control participants at 12-week postrandomization, and MAD participants showed greater, albeit nonsignificant, improvement in memory.
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  • 文章类型: Journal Article
    这篇综述提供了代谢相关脂肪肝疾病(MASLD)的非药物干预措施的实用和全面概述。专注于饮食和运动策略。它强调了咖啡消费的有效性,间歇性禁食,地中海和生酮饮食改善代谢和肝脏健康。该综述强调了将有氧和阻力训练结合起来作为减少肝脏脂肪和增加胰岛素敏感性的关键方法的重要性。此外,讨论了饮食和运动在增强肝脏参数方面的协同作用以及肠道菌群在MASLD中的作用。这篇论文强调了整体的必要性,个性化方法,综合饮食,锻炼,肠道健康,和耐心的动机。与药物和手术选择的副作用相比,它还强调了生活方式干预的长期益处和最小风险。审查呼吁个性化的治疗策略,持续的患者教育,并进一步研究优化MASLD管理的治疗结果。
    This review provides a practical and comprehensive overview of non-pharmacological interventions for metabolic-associated fatty liver disease (MASLD), focusing on dietary and exercise strategies. It highlights the effectiveness of coffee consumption, intermittent fasting, and Mediterranean and ketogenic diets in improving metabolic and liver health. The review emphasizes the importance of combining aerobic and resistance training as a critical approach to reducing liver fat and increasing insulin sensitivity. Additionally, it discusses the synergy between diet and exercise in enhancing liver parameters and the role of gut microbiota in MASLD. The paper underscores the need for a holistic, individualized approach, integrating diet, exercise, gut health, and patient motivation. It also highlights the long-term benefits and minimal risks of lifestyle interventions compared to the side effects of pharmacological and surgical options. The review calls for personalized treatment strategies, continuous patient education, and further research to optimize therapeutic outcomes in MASLD management.
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  • 文章类型: Journal Article
    低碳水化合物,运动员的高脂肪(LCHF)饮食会增加脂肪氧化,但会损害运动表现,可能是由于锻炼经济性受损。膳食补充硝酸盐可以通过增加一氧化氮的产生来改善运动经济性,这是由口腔内硝酸盐还原成亚硝酸盐引发的。这种反应依赖于硝酸盐还原口腔细菌的存在,饮食变化可能会改变,包括LCHF饮食。这项研究探索了LCHF饮食对口腔微生物组的影响以及补充硝酸盐后血浆亚硝酸盐浓度的随后变化。经过五天的LCHF或高碳水化合物(HCHO)控制饮食干预,训练有素的男性竞走者消耗了含有8.4mmol硝酸盐的140mL甜菜根汁;然后他们提供(a)用于血浆硝酸盐和亚硝酸盐分析的血液样本,以及(b)用于口腔微生物组16SrRNA测序的唾液样本。LCHF饮食(n=13)减少口腔细菌多样性,改变奈瑟氏球菌属的相对丰度(+10%),梭菌(+3%),普雷沃氏菌(-9%),和Veillonella(-4%),在HCHO饮食后没有观察到显著变化(n=11)。甜菜根汁摄入后,与HCHO饮食相比,LCHF饮食的血浆亚硝酸盐浓度更高(p=0.04).然而,与试验(pre-post)没有相互作用(p=0.71),这表明这种差异不是由于饮食干预.总之,我们发现补充硝酸盐后血浆硝酸盐和亚硝酸盐浓度升高,与饮食无关.这表明口腔微生物组适应于饮食变化并且可以维持硝酸盐还原能力,尽管LCHF饮食后细菌多样性减少。
    A low carbohydrate, high fat (LCHF) diet in athletes increases fat oxidation but impairs sports performance, potentially due to impaired exercise economy. Dietary nitrate supplementation can improve exercise economy via an increase in nitric oxide production, which is initiated by the reduction of nitrate to nitrite within the oral cavity. This reaction is dependent on the presence of nitrate-reducing oral bacteria, which can potentially be altered by dietary changes, including a LCHF diet. This study explored the effect of a LCHF diet on the oral microbiome and subsequent changes to plasma nitrite concentration following nitrate supplementation. Following five days of LCHF or high carbohydrate (HCHO) control dietary intervention, highly trained male race walkers consumed 140 mL beetroot juice containing 8.4 mmol nitrate; they then provided (a) blood samples for plasma nitrate and nitrite analysis and (b) saliva samples for 16S rRNA sequencing of the oral microbiome. The LCHF diet (n = 13) reduced oral bacterial diversity and changed the relative abundance of the genera Neisseria (+10%), Fusobacteria (+3%), Prevotella (-9%), and Veillonella (-4%), with no significant changes observed following the HCHO diet (n = 11). Following beetroot juice ingestion, plasma nitrite concentrations were higher for the LCHF diet compared to the HCHO diet (p = 0.04). However, the absence of an interaction with the trial (pre-post) (p = 0.71) suggests that this difference was not due to the dietary intervention. In summary, we found an increase in plasma nitrate and nitrite concentrations in response to nitrate supplementation independent of diet. This suggests the oral microbiome is adaptive to dietary changes and can maintain a nitrate reduction capacity despite a decrease in bacterial diversity following the LCHF diet.
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  • 文章类型: Video-Audio Media
    背景:肠道微生物群通过饮食组合来调节,宿主遗传学,和性影响。这些影响的大小和它们之间的相互作用对于理解肠道微生物群中的个体间变异性是重要的。在之前的研究中,观察到小鼠品系对美国饮食和生酮饮食的特异性反应以及几种代谢性状的QTL。在目前的研究中,我们搜索了对美国饮食和生酮饮食的肠道微生物群差异的潜在遗传变异,脂肪含量高,碳水化合物成分不同,C57BL/6J(B6)和FVB/NJ(FVB)小鼠品系之间的关系。
    结果:微生物特征的遗传图谱揭示了QTL模型下的18个基因座(即不是饮食或性别特有的边际效应),饮食模型下QTL的12个位点,和1个位点下的QTL按性别模子。多个代谢和微生物特征与从β多样性度量的主坐标分析中提取的特征向量一起映射到Chr1和Chr16的远端部分。双亲,Ruminiclostridium9和Rikenella(Chr1)被鉴定为与性别和饮食无关的QTL候选基石生物,和副杆菌属(Chr16)被确定为饮食特异性,将性状映射到这些区域的验证性因子分析中的候选基石生物。对于许多微生物特征,无论使用哪种QTL模型,饮食或饮食与基因型之间的相互作用是每种微生物性状丰度的最强预测因子。性,虽然对分析很重要,对微生物丰度的预测能力不强。
    结论:这些结果表明,性别,饮食,和遗传背景对肠道菌群的个体差异有不同程度的影响。因此,通过整合遗传变异的精准营养,微生物群,和影响微生物群变化的性别对于预测对碳水化合物组成变化的饮食的反应将是重要的。视频摘要。
    The gut microbiota is modulated by a combination of diet, host genetics, and sex effects. The magnitude of these effects and interactions among them is important to understanding inter-individual variability in gut microbiota. In a previous study, mouse strain-specific responses to American and ketogenic diets were observed along with several QTLs for metabolic traits. In the current study, we searched for genetic variants underlying differences in the gut microbiota in response to American and ketogenic diets, which are high in fat and vary in carbohydrate composition, between C57BL/6 J (B6) and FVB/NJ (FVB) mouse strains.
    Genetic mapping of microbial features revealed 18 loci under the QTL model (i.e., marginal effects that are not specific to diet or sex), 12 loci under the QTL by diet model, and 1 locus under the QTL by sex model. Multiple metabolic and microbial features map to the distal part of Chr 1 and Chr 16 along with eigenvectors extracted from principal coordinate analysis of measures of β-diversity. Bilophila, Ruminiclostridium 9, and Rikenella (Chr 1) were identified as sex- and diet-independent QTL candidate keystone organisms, and Parabacteroides (Chr 16) was identified as a diet-specific, candidate keystone organism in confirmatory factor analyses of traits mapping to these regions. For many microbial features, irrespective of which QTL model was used, diet or the interaction between diet and a genotype were the strongest predictors of the abundance of each microbial trait. Sex, while important to the analyses, was not as strong of a predictor for microbial abundances.
    These results demonstrate that sex, diet, and genetic background have different magnitudes of effects on inter-individual differences in gut microbiota. Therefore, Precision Nutrition through the integration of genetic variation, microbiota, and sex affecting microbiota variation will be important to predict response to diets varying in carbohydrate composition. Video Abstract.
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  • 文章类型: Journal Article
    背景:营养为运动员提供最佳表现。随着研究的发展,许多可用的饮食,以及专业运动员的宣传,有必要回顾饮食模式对运动表现的影响。
    结果:地中海饮食是一种低炎症饮食,与改善力量和肌肉耐力以及身体成分有关。生酮饮食限制碳水化合物和蛋白质。虽然两者都没有体重减轻,生酮饮食,这是一种更严格的低碳水化合物饮食形式,可能更难以遵循。高蛋白和低碳水化合物饮食的蛋白质节奏版本也显示出有利于运动表现。植物性饮食有许多变化。素食主义者有微量营养素缺乏和亮氨酸含量下降的风险,因此,肌肉蛋白质合成减少。然而,与杂食动物相比,文献并未显示性能下降。间歇性禁食有许多不同的版本,这可能不适合那些有合并症或特定需求的人,也会导致冲刺速度下降和疲惫时间恶化。
    结论:本文严格评估了饮食与运动表现相关的研究,并详细介绍了应监测的一些潜在风险。没有人普遍推荐运动员饮食;然而,本文提供的信息供运动员分析,与医疗专业顾问一起,他们自己的饮食,并考虑可持续的变化,可以帮助实现性能和身体习惯目标。
    BACKGROUND: Nutrition fuels optimal performance for athletes. With increased research developments, numerous diets available, and publicity from professional athletes, a review of dietary patterns impact on athletic performance is warranted.
    RESULTS: The Mediterranean diet is a low inflammatory diet linked to improved power and muscle endurance and body composition. Ketogenic diets are restrictive of carbohydrates and proteins. Though both show no decrements in weight loss, ketogenic diets, which is a more restrictive form of low-carbohydrate diets, can be more difficult to follow. High-protein and protein-paced versions of low-carbohydrate diets have also shown to benefit athletic performance. Plant-based diets have many variations. Vegans are at risk of micronutrient deficiencies and decreased leucine content, and therefore, decreased muscle protein synthesis. However, the literature has not shown decreases in performance compared to omnivores. Intermittent fasting has many different versions, which may not suit those with comorbidities or specific needs as well as lead to decreases in sprint speed and worsening time to exhaustion.
    CONCLUSIONS: This paper critically evaluates the research on diets in relation to athletic performance and details some of the potential risks that should be monitored. No one diet is universally recommend for athletes; however, this article provides the information for athletes to analyze, in conjunction with medical professional counsel, their own diet and consider sustainable changes that can help achieve performance and body habitus goals.
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  • 文章类型: Journal Article
    改变饮食以治疗疾病日期为c。当饥饿用于减少癫痫患者的癫痫发作时,公元前400年。当前自闭症谱系障碍(ASD)的症状学和机制的多样性以及相应的缺乏针对特定疾病的有效治疗方法,促使人们将饮食评估为改善ASD症状的治疗方法。在这篇评论文章中,我们总结了ASD营养研究的主要发现,强调自闭症最常见的单基因病因,脆性X综合征(FXS),研究最多的饮食干预,生酮饮食以及其他饮食干预措施。我们还讨论了与前和益生菌疗法相关的肠道微生物群,并提供了对未来方向的见解,这些方向可以帮助理解饮食功效的潜在机制。
    Altering the diet to treat disease dates to c. 400 BC when starvation was used to reduce seizures in persons with epilepsy. The current diversity of symptomology and mechanisms underlying autism spectrum disorders (ASDs) and a corresponding lack of disorder-specific effective treatments prompts an evaluation of diet as a therapeutic approach to improve symptoms of ASDs. In this review article, we summarize the main findings of nutritional studies in ASDs, with an emphasis on the most common monogenic cause of autism, Fragile X Syndrome (FXS), and the most studied dietary intervention, the ketogenic diet as well as other dietary interventions. We also discuss the gut microbiota in relation to pre- and probiotic therapies and provide insight into future directions that could aid in understanding the mechanism(s) underlying dietary efficacy.
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  • 文章类型: Journal Article
    痴呆症是一个日益增长的公共卫生问题,估计全世界有5700万成年人。阿尔茨海默病(AD)占病例的60-80%。测试潜在药物和神经保护剂的临床试验被证明是徒劳的,目前批准的药物仅提供对症的益处。新兴的流行病学和临床研究表明,生活方式的改变,包括饮食和体力活动,为减缓和预防认知衰退和痴呆提供另一种治疗途径。年龄是痴呆症最常见的危险因素,它与减缓细胞生物能学和代谢过程有关。因此,营养丰富的饮食对于最佳的大脑健康至关重要。此外,2型糖尿病(T2D)是AD的危险因素,降低T2D风险的饮食可能赋予神经保护。地中海的主要食物,心灵,和DASH饮食,包括水果,绿叶蔬菜,鱼,坚果,橄榄油,可以预防或减缓认知能力下降。这些营养素促进大脑健康的机制,然而,尚未完全理解。其他饮食方法和饮食制度,包括生酮和间歇性禁食,对大脑健康也有益。这篇综述总结了病理生理学,相关危险因素,以及几种饮食和饮食方式激活的潜在神经保护途径,这些途径在促进大脑健康和预防痴呆症方面显示出有希望的结果。
    Dementia is a growing public health concern, with an estimated prevalence of 57 million adults worldwide. Alzheimer\'s disease (AD) accounts for 60-80% of the cases. Clinical trials testing potential drugs and neuroprotective agents have proven futile, and currently approved drugs only provide symptomatic benefits. Emerging epidemiological and clinical studies suggest that lifestyle changes, including diet and physical activity, offer an alternative therapeutic route for slowing and preventing cognitive decline and dementia. Age is the single most common risk factor for dementia, and it is associated with slowing cellular bioenergetics and metabolic processes. Therefore, a nutrient-rich diet is critical for optimal brain health. Furthermore, type 2 diabetes (T2D) is a risk factor for AD, and diets that reduce the risk of T2D may confer neuroprotection. Foods predominant in Mediterranean, MIND, and DASH diets, including fruits, leafy green vegetables, fish, nuts, and olive oil, may prevent or slow cognitive decline. The mechanisms by which these nutrients promote brain health, however, are not yet completely understood. Other dietary approaches and eating regimes, including ketogenic and intermittent fasting, are also emerging as beneficial for brain health. This review summarizes the pathophysiology, associated risk factors, and the potential neuroprotective pathways activated by several diets and eating regimes that have shown promising results in promoting brain health and preventing dementia.
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  • 文章类型: Randomized Controlled Trial
    (1)背景:地中海生酮营养(MKN)可能直接针对与老年人痴呆风险相关的多种神经生物学机制。尽管承诺,这种类型的营养可能是具有挑战性的学习和坚持以健康的方式。我们的团队使用美国国立卫生研究院肥胖相关行为干预试验(NIHORBIT)模型来开发和试点一项计划,以帮助有记忆问题的老年人使用MKN。(2)方法:使用双臂,随机设计,与MKN教育(MKNE)计划相比,我们评估了MKN坚持(MKNA)计划(N=58).研究组之间的主要差异涉及仅在MKNA组中使用动机性访谈(MI)策略和行为改变技术(BCT)。如果参与者在蒙特利尔认知评估(得分19≤26)中证明了主观记忆问题或客观记忆障碍,则将其包括在内。检查的主要结果包括可行性,可接受性,坚持,以及与该计划相关的临床结果。(3)结果:总体上,两组的计划完成度都相对较高,79%的参与者完成了为期6周的课程。招募方案需要调整,但成功达到目标样本量。与MKNE相比,MKNA部门的保留率(82%)和会议出勤率(91%)更高(保留率=72%;出勤率=77%)。总的来说,两组中的大多数参与者使用客户满意度问卷将该计划评为“优秀”。在为期6周的计划中,MKNA小组的参与者证明了对MKN的客观和自我报告依从性更高。Further,有一些证据表明该计划的临床益处,尽管在3个月的随访中,这些影响随着依从性的降低而减弱。(4)讨论:这项试点试验表明,结合MI和BCT策略的MKN计划可能比单独的营养教育计划更好地吸引和留住参与者,尽管两组参与者都报告了很高的满意度。
    (1) Background: Mediterranean ketogenic nutrition (MKN) may directly target multiple neurobiological mechanisms associated with dementia risk in older adults. Despite its promise, this type of nutrition can be challenging to learn and adhere to in a healthy manner. Our team used the National Institutes of Health Obesity Related Behavioral Intervention Trials (NIH ORBIT) model to develop and pilot a program to help older adults with memory concerns use MKN. (2) Methods: Using a two-arm, randomized design, we evaluated an MKN Adherence (MKNA) program compared to an MKN education (MKNE) program (N = 58). The primary difference between study arms involved the use of motivational interviewing (MI) strategies and behavior change techniques (BCT) only in the MKNA arm. Participants were included if they evidenced subjective memory concerns or objective memory impairment on the Montreal Cognitive Assessment (Score 19 ≤ 26). Primary outcomes examined included feasibility, acceptability, adherence, and clinical outcomes associated with the program. (3) Results: Overall, there was relatively high program completion in both groups, with 79% of participants completing the 6-week program. The recruitment protocol required adjustment but was successful in reaching the target sample size. Retention (82%) and session attendance (91%) were higher in the MKNA arm compared to the MKNE (retention = 72%; attendance = 77%). Overall, most participants in both groups rated the program as \"excellent\" using the client satisfaction questionnaire. Participants in the MKNA arm evidenced higher objective and self-reported adherence to MKN during the 6-week program. Further, there was some evidence of clinical benefits of the program, although these effects diminished as adherence decreased in the 3 months follow-up. (4) Discussion: This pilot trial demonstrated that the MKN program incorporating MI and BCT strategies may better engage and retain participants than a nutrition education program alone, although participants in both groups reported high satisfaction.
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  • 文章类型: Journal Article
    背景:生酮饮食具有抗炎和神经保护特性,这使得这些饮食对于患有多发性硬化症(MS)的患者而言是有吸引力的补充治疗方法。本研究的目的是评估生酮饮食对神经丝轻链(NfL)的影响,神经轴索损伤的生物标志物。
    方法:39例复发性MS患者完成了为期6个月的生酮饮食干预。在基线(饮食前)和6个月饮食时测定NfL水平。此外,生酮饮食研究参与者与一个历史队列(n=31)进行了比较,未处理的MS对照。
    结果:基线(饮食前)平均NfL为5.45pg/ml(95%CI4.59-6.31)。生酮饮食6个月后,平均NfL无显著变化(5.49pg/ml;95%CI4.82-6.19)。与未经处理的MS对照(平均15.17pg/ml)相比,生酮饮食队列的NfL水平相对较低。具有较高水平的酮症(如通过血清β-羟基丁酸酯测量的)的MS受试者在基线和生酮饮食的6个月之间表现出更大的NfL降低。
    结论:生酮饮食不会使复发性MS患者神经变性的生物标志物恶化,稳定,在整个饮食干预中观察到低水平的NfL。具有更高的酮症生物标志物的受试者在血清NfL中经历了更高程度的改善。
    背景:NCT03718247-\"复发MS患者使用生酮饮食\"https://clinicaltrials.gov/ct2/show/NCT03718247。
    BACKGROUND: Ketogenic diets have anti-inflammatory and neuroprotective properties which make these diets an attractive complimentary treatment approach for patients living with multiple sclerosis (MS). The objective of this study was to assess the impact of ketogenic diets on neurofilament light chain (NfL), a biomarker of neuroaxonal injury.
    METHODS: Thirty-nine subjects with relapsing MS completed a 6-month ketogenic diet intervention. NfL levels were assayed at both baseline (pre-diet) and 6-months on-diet. In addition, ketogenic diet study participants were compared to a cohort (n = 31) of historical, untreated MS controls.
    RESULTS: Baseline (pre-diet) mean NfL was 5.45 pg/ml (95% CI 4.59 - 6.31). After 6 months on ketogenic diet, mean NfL was not significantly changed (5.49 pg/ml; 95% CI 4.82 - 6.19). Compared to untreated MS controls (mean 15.17 pg/ml), NfL levels for the ketogenic diet cohort were relatively low. MS subjects with higher levels of ketosis (as measured by serum beta-hydroxybutyrate) exhibited greater reductions in NfL between baseline and 6-months on ketogenic diet.
    CONCLUSIONS: Ketogenic diets do not worsen biomarkers of neurodegeneration in relapsing MS patients, with stable, low levels of NfL observed throughout the diet intervention. Subjects with greater biomarkers of ketosis experienced a higher degree of improvement in serum NfL.
    BACKGROUND: NCT03718247 - \"Utilization of the Ketogenic Diet in Patients with Relapsing-Remitting MS\" https://clinicaltrials.gov/ct2/show/NCT03718247.
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