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Diachenko AI, Rodin IA, Krasnova TN, Klychnikov OI, Nefedova LN. The Role of Vitamin K in the Development of Neurodegenerative Diseases. BIOCHEMISTRY. BIOKHIMIIA 2024; 89:S57-S70. [PMID: 38621744 DOI: 10.1134/s0006297924140049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/18/2023] [Accepted: 09/22/2023] [Indexed: 04/17/2024]
Abstract
Neurodegenerative diseases are a growing global health problem with enormous consequences for individuals and society. The most common neurodegenerative diseases, such as Alzheimer's and Parkinson's diseases, can be caused by both genetic factors (mutations) and epigenetic changes caused by the environment, in particular, oxidative stress. One of the factors contributing to the development of oxidative stress that has an important effect on the nervous system is vitamin K, which is involved in redox processes. However, its role in cells is ambiguous: accumulation of high concentrations of vitamin K increases the content of reactive oxygen species increases, while small amounts of vitamin K have a protective effect and activate the antioxidant defense systems. The main function of vitamin K is its involvement in the gamma carboxylation of the so-called Gla proteins. Some Gla proteins are expressed in the nervous system and participate in its development. Vitamin K deficiency can lead to a decrease or loss of function of Gla proteins in the nervous system. It is assumed that the level of vitamin K in the body is associated with specific changes involved in the development of dementia and cognitive abilities. Vitamin K also influences the sphingolipid profile in the brain, which also affects cognitive function. The role of vitamin K in the regulation of biochemical processes at the cellular and whole-organism levels has been studied insufficiently. Further research can lead to the discovery of new targets for vitamin K and development of personalized diets and therapies.
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Affiliation(s)
- Anna I Diachenko
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Igor A Rodin
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Tatiana N Krasnova
- Faculty of Fundamental Medicine, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Oleg I Klychnikov
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Lidia N Nefedova
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia.
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2
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Emekli-Alturfan E, Alturfan AA. The emerging relationship between vitamin K and neurodegenerative diseases: a review of current evidence. Mol Biol Rep 2023; 50:815-828. [PMID: 36329336 DOI: 10.1007/s11033-022-07925-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 09/06/2022] [Indexed: 11/06/2022]
Abstract
Neurodegenerative disease refers to a group of disorders that predominantly damage the neurons in the brain. Despite significant progress in the knowledge of neurodegenerative diseases, there is currently no disease-modifying drug available. Vitamin K was first established for its involvement in blood clotting, but there is now compelling evidence indicating its role in the neurological system. In particular, the results of recent studies on the effects of vitamin K2 on preventing apoptosis, oxidative stress, and microglial activation in neuron cells through its role in electron transport are very promising against Alzheimer's disease. In addition to its protective effect on cognitive functions, its inhibitory effects on inflammation and α-synuclein fibrillization in Parkinson's disease, which has been revealed in recent years, are remarkable. Although there are many studies on the mechanism and possible treatment methods of neurodegenerative diseases, especially Parkinson's and Alzheimer's disease, studies on the relationship between vitamin K and neurodegenerative diseases are very limited, yet have promising findings. Vitamin K has also been proposed for therapeutic use in multiple sclerosis patients to lower the intensity or to slow down the progression of the disease. Accordingly, the aim of this study is to review the current evidence for the use of vitamin K supplementation in neurodegenerative diseases, in particular Alzheimer's disease, Parkinson's disease, and multiple sclerosis.
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Affiliation(s)
- Ebru Emekli-Alturfan
- Faculty of Dentistry, Department of Basic Medical Sciences, Marmara University, Istanbul, Turkey.
| | - A Ata Alturfan
- Faculty of Medicine, Department of Biochemistry, Istanbul University-Cerrahpaşa, Istanbul, Turkey
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3
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Montague B, Summers A, Bhawal R, Anderson ET, Kraus-Malett S, Zhang S, Goggs R. Identifying potential biomarkers and therapeutic targets for dogs with sepsis using metabolomics and lipidomics analyses. PLoS One 2022; 17:e0271137. [PMID: 35802586 PMCID: PMC9269464 DOI: 10.1371/journal.pone.0271137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 06/23/2022] [Indexed: 11/19/2022] Open
Abstract
Sepsis is a diagnostic and therapeutic challenge and is associated with morbidity and a high risk of death. Metabolomic and lipidomic profiling in sepsis can identify alterations in metabolism and might provide useful insights into the dysregulated host response to infection, but investigations in dogs are limited. We aimed to use untargeted metabolomics and lipidomics to characterize metabolic pathways in dogs with sepsis to identify therapeutic targets and potential diagnostic and prognostic biomarkers. In this prospective observational cohort study, we examined the plasma metabolomes and lipidomes of 20 healthy control dogs and compared them with those of 21 client-owned dogs with sepsis. Patient data including signalment, physical exam findings, clinicopathologic data and clinical outcome were recorded. Metabolites were identified using an untargeted mass spectrometry approach and pathway analysis identified multiple enriched metabolic pathways including pyruvaldehyde degradation; ketone body metabolism; the glucose-alanine cycle; vitamin-K metabolism; arginine and betaine metabolism; the biosynthesis of various amino acid classes including the aromatic amino acids; branched chain amino acids; and metabolism of glutamine/glutamate and the glycerophospholipid phosphatidylethanolamine. Metabolites were identified with high discriminant abilities between groups which could serve as potential biomarkers of sepsis including 13,14-Dihydro-15-keto Prostaglandin A2; 12(13)-DiHOME (12,13-dihydroxy-9Z-octadecenoic acid); and 9-HpODE (9-Hydroxyoctadecadienoic acid). Metabolites with higher abundance in samples from nonsurvivors than survivors included 3-(2-hydroxyethyl) indole, indoxyl sulfate and xanthurenic acid. Untargeted lipidomic profiling revealed multiple sphingomyelin species (SM(d34:0)+H; SM(d36:0)+H; SM(d34:0)+HCOO; and SM(d34:1D3)+HCOO); lysophosphatidylcholine molecules (LPC(18:2)+H) and lipophosphoserine molecules (LPS(20:4)+H) that were discriminating for dogs with sepsis. These biomarkers could aid in the diagnosis of dogs with sepsis, provide prognostic information, or act as potential therapeutic targets.
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Affiliation(s)
- Brett Montague
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - April Summers
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Ruchika Bhawal
- Proteomics and Metabolomics Facility, Cornell University, Ithaca, New York, United States of America
| | - Elizabeth T. Anderson
- Proteomics and Metabolomics Facility, Cornell University, Ithaca, New York, United States of America
| | - Sydney Kraus-Malett
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Sheng Zhang
- Proteomics and Metabolomics Facility, Cornell University, Ithaca, New York, United States of America
| | - Robert Goggs
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
- * E-mail:
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Wang A, Zhao M, Luo J, Zhang T, Zhang D. Association of Dietary Vitamin K Intake With Cognition in the Elderly. Front Nutr 2022; 9:900887. [PMID: 35811956 PMCID: PMC9260313 DOI: 10.3389/fnut.2022.900887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 06/07/2022] [Indexed: 11/13/2022] Open
Abstract
Several previous studies discussed the association between vitamin K (VK) status and cognition. But the association between dietary VK consumption and cognitive performance in the elderly was not well understood. Therefore, we investigated the correlation between dietary VK intake and the cognition of the elderly. Our research used the data of the National Health and Nutrition Examination Survey (NHANES) from 2011 to 2014. The dietary intake of VK was assessed by two 24-h dietary recalls. The cognitive function was measured in the survey of NHANES, including the Consortium to Establish a Registry for Alzheimer’s disease Word Learning subtest (CERAD W-L), Animal Fluency Test (AFT), and Digit Symbol Substitution Test (DSST). Logistic regression and restricted cubic spline models were applied to assess the relationship between dietary VK intake and cognition. Compared with the lowest dietary VK intake group, the multivariate-adjusted odds ratio (OR) [95% confidence interval (95% CI)] of low CERAD W-L score for the highest intake group was 0.39 (0.26–0.60), the multivariate-adjusted OR (95% CI) of low AFT score was 0.59 (0.38–0.92), and the multivariate-adjusted OR (95% CI) of low DSST score was 0.44 (0.29–0.65), respectively. There was an L-shaped dose–response relationship between dietary VK intake and low CERAD W-L score. There was a linear dose–response relationship between dietary VK intake and low AFT score, and there was also a linear dose–response relationship for the low DSST score. In addition, we also found a negative association between VK from vegetables and the risk of low CERAD W-L scores. Dietary VK intake and VK intake from vegetables were inversely related to the risk of low cognitive performance of the elderly.
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Affiliation(s)
- Anni Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Qingdao University, Qingdao, China
| | - Meng Zhao
- School of Nursing, Qingdao University Medical College, Qingdao, China
| | - Jia Luo
- Department of Epidemiology and Health Statistics, School of Public Health, Qingdao University, Qingdao, China
| | - Tianhao Zhang
- Department of Epidemiology and Health Statistics, School of Public Health, Qingdao University, Qingdao, China
| | - Dongfeng Zhang
- Department of Epidemiology and Health Statistics, School of Public Health, Qingdao University, Qingdao, China
- *Correspondence: Dongfeng Zhang,
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Wang XQ, Li H, Li XN, Yuan CH, Zhao H. Gut-Brain Axis: Possible Role of Gut Microbiota in Perioperative Neurocognitive Disorders. Front Aging Neurosci 2022; 13:745774. [PMID: 35002672 PMCID: PMC8727913 DOI: 10.3389/fnagi.2021.745774] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 12/03/2021] [Indexed: 12/19/2022] Open
Abstract
Aging is becoming a severe social phenomenon globally, and the improvements in health care and increased health awareness among the elderly have led to a dramatic increase in the number of surgical procedures. Because of the degenerative changes in the brain structure and function in the elderly, the incidence of perioperative neurocognitive disorders (PND) is much higher in elderly patients than in young people following anesthesia/surgery. PND is attracting more and more attention, though the exact mechanisms remain unknown. A growing body of evidence has shown that the gut microbiota is likely involved. Recent studies have indicated that the gut microbiota may affect postoperative cognitive function via the gut-brain axis. Nonetheless, understanding of the mechanistic associations between the gut microbiota and the brain during PND progression remains very limited. In this review, we begin by providing an overview of the latest progress concerning the gut-brain axis and PND, and then we summarize the influence of perioperative factors on the gut microbiota. Next, we review the literature on the relationship between gut microbiota and PND and discuss how gut microbiota affects cognitive function during the perioperative period. Finally, we explore effective early interventions for PND to provide new ideas for related clinical research.
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Affiliation(s)
- Xiao-Qing Wang
- Department of Anesthesiology, School of Medicine, Affiliated Yancheng Hospital, Southeast University, Yancheng, China
| | - He Li
- Department of Anesthesiology, Affiliated Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiang-Nan Li
- Department of Anesthesiology, School of Medicine, Affiliated Yancheng Hospital, Southeast University, Yancheng, China
| | - Cong-Hu Yuan
- Department of Anesthesiology, School of Medicine, Affiliated Yancheng Hospital, Southeast University, Yancheng, China
| | - Hang Zhao
- Department of Anesthesiology, School of Medicine, Affiliated Yancheng Hospital, Southeast University, Yancheng, China
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6
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Vitamin K2 Holds Promise for Alzheimer's Prevention and Treatment. Nutrients 2021; 13:nu13072206. [PMID: 34199021 PMCID: PMC8308377 DOI: 10.3390/nu13072206] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 06/24/2021] [Accepted: 06/24/2021] [Indexed: 12/24/2022] Open
Abstract
Recent studies have highlighted the importance of vitamin K2 (VK2) in human health. However, there have been no clinical studies investigating the role of VK2 in the prevention or treatment of Alzheimer's disease (AD), a debilitating disease for which currently there is no cure. In reviewing basic science research and clinical studies that have connected VK2 to factors involved in AD pathogenesis, we have found a growing body of evidence demonstrating that VK2 has the potential to slow the progression of AD and contribute to its prevention. In our review, we consider the antiapoptotic and antioxidant effects of VK2 and its impact on neuroinflammation, mitochondrial dysfunction, cognition, cardiovascular health, and comorbidities in AD. We also examine the link between dysbiosis and VK2 in the context of the microbiome's role in AD pathogenesis. Our review is the first to consider the physiological roles of VK2 in the context of AD, and, given the recent shift in AD research toward nonpharmacological interventions, our findings emphasize the timeliness and need for clinical studies involving VK2.
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Kołakowski A, Kurzyna PF, Żywno H, Bzdęga W, Harasim-Symbor E, Chabowski A, Konstantynowicz-Nowicka K. Vitamin K2 as a New Modulator of the Ceramide De Novo Synthesis Pathway. Molecules 2021; 26:molecules26113377. [PMID: 34204938 PMCID: PMC8199730 DOI: 10.3390/molecules26113377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 12/31/2022] Open
Abstract
The aim of the study was to evaluate the influence of vitamin K2 (VK2) supplementation on the sphingolipid metabolism pathway in palmitate-induced insulin resistant hepatocytes. The study was carried out on human hepatocellular carcinoma cells (HepG2) incubated with VK2 and/or palmitic acid (PA). The concentrations of sphingolipids were measured by high-performance liquid chromatography. The expression of enzymes from the sphingolipid pathway was assessed by Western blotting. The same technique was used in order to determine changes in the expression of the proteins from the insulin signaling pathway in the cells. Simultaneous incubation of HepG2 cells with palmitate and VK2 elevated accumulation of sphinganine and ceramide with increased expression of enzymes from the ceramide de novo synthesis pathway. HepG2 treatment with palmitate and VK2 significantly decreased the insulin-stimulated expression ratio of insulin signaling proteins. Moreover, we observed that the presence of PA w VK2 increased fatty acid transport protein 2 expression. Our study showed that VK2 activated the ceramide de novo synthesis pathway, which was confirmed by the increase in enzymes expression. VK2 also intensified fatty acid uptake, ensuring substrates for sphingolipid synthesis through the de novo pathway. Furthermore, increased concentration of sphingolipids, mainly sphinganine, inhibited insulin pathway proteins phosphorylation, increasing insulin resistance development.
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Romano S, Savva GM, Bedarf JR, Charles IG, Hildebrand F, Narbad A. Meta-analysis of the Parkinson's disease gut microbiome suggests alterations linked to intestinal inflammation. NPJ Parkinsons Dis 2021. [PMID: 33692356 DOI: 10.1101/2020.08.10.20171397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
The gut microbiota is emerging as an important modulator of neurodegenerative diseases, and accumulating evidence has linked gut microbes to Parkinson's disease (PD) symptomatology and pathophysiology. PD is often preceded by gastrointestinal symptoms and alterations of the enteric nervous system accompany the disease. Several studies have analyzed the gut microbiome in PD, but a consensus on the features of the PD-specific microbiota is missing. Here, we conduct a meta-analysis re-analyzing the ten currently available 16S microbiome datasets to investigate whether common alterations in the gut microbiota of PD patients exist across cohorts. We found significant alterations in the PD-associated microbiome, which are robust to study-specific technical heterogeneities, although differences in microbiome structure between PD and controls are small. Enrichment of the genera Lactobacillus, Akkermansia, and Bifidobacterium and depletion of bacteria belonging to the Lachnospiraceae family and the Faecalibacterium genus, both important short-chain fatty acids producers, emerged as the most consistent PD gut microbiome alterations. This dysbiosis might result in a pro-inflammatory status which could be linked to the recurrent gastrointestinal symptoms affecting PD patients.
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Affiliation(s)
- Stefano Romano
- Quadram Institute Bioscience, Norwich Research Park, Norwich, UK.
| | - George M Savva
- Quadram Institute Bioscience, Norwich Research Park, Norwich, UK
| | - Janis R Bedarf
- Quadram Institute Bioscience, Norwich Research Park, Norwich, UK
- Department of Neurology, University of Bonn, Bonn, Germany
| | - Ian G Charles
- Quadram Institute Bioscience, Norwich Research Park, Norwich, UK
- University of East Anglia, Norwich Research Park, Norwich, UK
| | - Falk Hildebrand
- Quadram Institute Bioscience, Norwich Research Park, Norwich, UK.
- Earlham Institute, Norwich Research Park, Norwich, UK.
| | - Arjan Narbad
- Quadram Institute Bioscience, Norwich Research Park, Norwich, UK
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Meta-analysis of the Parkinson's disease gut microbiome suggests alterations linked to intestinal inflammation. NPJ Parkinsons Dis 2021; 7:27. [PMID: 33692356 PMCID: PMC7946946 DOI: 10.1038/s41531-021-00156-z] [Citation(s) in RCA: 282] [Impact Index Per Article: 94.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 01/08/2021] [Indexed: 02/06/2023] Open
Abstract
The gut microbiota is emerging as an important modulator of neurodegenerative diseases, and accumulating evidence has linked gut microbes to Parkinson's disease (PD) symptomatology and pathophysiology. PD is often preceded by gastrointestinal symptoms and alterations of the enteric nervous system accompany the disease. Several studies have analyzed the gut microbiome in PD, but a consensus on the features of the PD-specific microbiota is missing. Here, we conduct a meta-analysis re-analyzing the ten currently available 16S microbiome datasets to investigate whether common alterations in the gut microbiota of PD patients exist across cohorts. We found significant alterations in the PD-associated microbiome, which are robust to study-specific technical heterogeneities, although differences in microbiome structure between PD and controls are small. Enrichment of the genera Lactobacillus, Akkermansia, and Bifidobacterium and depletion of bacteria belonging to the Lachnospiraceae family and the Faecalibacterium genus, both important short-chain fatty acids producers, emerged as the most consistent PD gut microbiome alterations. This dysbiosis might result in a pro-inflammatory status which could be linked to the recurrent gastrointestinal symptoms affecting PD patients.
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Stacchiotti V, Rezzi S, Eggersdorfer M, Galli F. Metabolic and functional interplay between gut microbiota and fat-soluble vitamins. Crit Rev Food Sci Nutr 2020; 61:3211-3232. [PMID: 32715724 DOI: 10.1080/10408398.2020.1793728] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Gut microbiota is a complex ecosystem seen as an extension of human genome. It represents a major metabolic interface of interaction with food components and xenobiotics in the gastrointestinal (GI) environment. In this context, the advent of modern bacterial genome sequencing technology has enabled the identification of dietary nutrients as key determinants of gut microbial ecosystem able to modulate the host-microbiome symbiotic relationship and its effects on human health. This article provides a literature review on functional and molecular interactions between a specific group of lipids and essential nutrients, e.g., fat-soluble vitamins (FSVs), and the gut microbiota. A two-way relationship appears to emerge from the available literature with important effects on human metabolism, nutrition, GI physiology and immune function. First, FSV directly or indirectly modify the microbial composition involving for example immune system-mediated and/or metabolic mechanisms of bacterial growth or inhibition. Second, the gut microbiota influences at different levels the synthesis, metabolism and transport of FSV including their bioactive metabolites that are either introduced with the diet or released in the gut via entero-hepatic circulation. A better understanding of these interactions, and of their impact on intestinal and metabolic homeostasis, will be pivotal to design new and more efficient strategies of disease prevention and therapy, and personalized nutrition.
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Affiliation(s)
- Valentina Stacchiotti
- Micronutrient Vitamins and Lipidomics Lab, Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy
| | - Serge Rezzi
- Swiss Vitamin Institute, Epalinges, Switzerland
| | - Manfred Eggersdorfer
- Department of Internal Medicine, University Medical Center Groningen, Groningen, the Netherlands
| | - Francesco Galli
- Micronutrient Vitamins and Lipidomics Lab, Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy
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11
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Vitamin K Concentration and Cognitive Status in Elderly Patients on Anticoagulant Therapy: A Pilot Study. J Aging Res 2020; 2020:9695324. [PMID: 32148962 PMCID: PMC7049843 DOI: 10.1155/2020/9695324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 11/20/2019] [Accepted: 12/26/2019] [Indexed: 02/03/2023] Open
Abstract
Objectives Recent studies have suggested that vitamin K may exert significant effects on the central nervous system. The present study investigates the relationship between vitamin K plasmatic levels and cognitive functions in elderly patients on oral anticoagulant therapy (OAT). Design At the Thrombosis Centre of Haematology, “Sapienza” University of Rome, 85 patients on OAT, aged between 75 and 92, were randomly enrolled in the study. Patients were on OAT with vitamin K antagonists (VKAs). Vitamin K1 concentrations were determined using standardized High-Performance Liquid Chromatography (HPLC). Cognitive functions were assessed using the Milan Overall Dementia Assessment (MODA). Results MODA scores are positively correlated to vitamin K1 concentration. Patients with vitamin K1 below 0.100 μg/L and between 0.100 and 0.400 μg/L and between 0.100 and 0.400 μg/L and between 0.100 and 0.400 p < 0.001). Even long-term OAT (>10 years) does not affect MODA scores. Education seems to exert a greater role on the cognitive status in comparison with aging. Conclusions The study shows a positive association between vitamin K1 concentration and cognitive status in elderly patients (≥75 years) on OAT. The relationship between vitamin K1 concentration and MODA scores is described by a linear model. Cognitive status is not influenced by the duration of OAT but by the years of education.
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12
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McCann A, Jeffery IB, Ouliass B, Ferland G, Fu X, Booth SL, Tran TTT, O'Toole PW, O'Connor EM. Exploratory analysis of covariation of microbiota-derived vitamin K and cognition in older adults. Am J Clin Nutr 2019; 110:1404-1415. [PMID: 31518386 PMCID: PMC6885478 DOI: 10.1093/ajcn/nqz220] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 08/07/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Vitamin K has multiple important physiological roles, including blood coagulation and beneficial effects on myelin integrity in the brain. Some intestinal microbes possess the genes to produce vitamin K in the form of menaquinone (MK). MK appears in higher concentration in tissues, such as the brain, particularly MK4, than the dietary form of phylloquinone (PK). Lower PK concentrations have been reported in patients with Alzheimer disease while higher serum PK concentrations have been positively associated with verbal episodic memory. Despite knowledge of the importance of vitamin K for various health parameters, few studies have measured MK concentration and biosynthesis by gut commensals. OBJECTIVE The aim of the current study was to investigate the relation between genes involved in gut-microbiota derived MK, concentrations of MK isoforms, and cognitive function. METHODS Shotgun metagenomic sequencing of the gut microbiome of 74 elderly individuals with different cognitive ability levels was performed. From this, gene counts for microbial MK biosynthesis were determined. Associations between clusters of individuals, grouped based on a similar presence and prevalence of MK biosynthesis genes, and cognitive ability were investigated. Fecal MK concentrations were quantified by HPLC to investigate correlations with subject clusters. RESULTS Separation of subject groups defined by banded quantification of the genetic potential of their microbiome to biosynthesize MK was associated with significant differences in cognitive ability [assessed using the Mini-Mental State Examination (MMSE)]. Three MK isoforms were found to be positively associated with MMSE, along with the identification of key components of the MK pathway that drive this association. Although the causality and direction of these associations remain unknown, these findings justify further studies. CONCLUSIONS This study provides evidence that although total concentrations of MK did not covary with cognition, certain MK isoforms synthesized by the gut microbiome, particularly the longer chains, are positively associated with cognition.
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Affiliation(s)
- Angela McCann
- School of Microbiology, University College Cork, Cork, Ireland,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Ian B Jeffery
- School of Microbiology, University College Cork, Cork, Ireland,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Bouchra Ouliass
- Département de Nutrition, Université de Montréal, Montreal, Canada
| | - Guylaine Ferland
- Département de Nutrition, Université de Montréal, Montreal, Canada
| | - Xueyen Fu
- Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Sarah L Booth
- Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Tam T T Tran
- School of Microbiology, University College Cork, Cork, Ireland,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Paul W O'Toole
- School of Microbiology, University College Cork, Cork, Ireland,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Eibhlís M O'Connor
- APC Microbiome Ireland, University College Cork, Cork, Ireland,Department of Biological Sciences, School of Natural Sciences, University of Limerick, Limerick, Ireland,Health Research Institute, University of Limerick, Limerick, Ireland,Address correspondence to EMOC (E-mail: )
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13
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Vitamin K enhances the production of brain sulfatides during remyelination. PLoS One 2018; 13:e0203057. [PMID: 30148869 PMCID: PMC6110503 DOI: 10.1371/journal.pone.0203057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 08/14/2018] [Indexed: 12/02/2022] Open
Abstract
Multiple sclerosis (MS) is a devastating neurological disease, which is characterized by multifocal demyelinating lesions in the central nervous system. The most abundant myelin lipids are galactosylceramides and their sulfated form, sulfatides, which together account for about 27% of the total dry weight of myelin. In this study we investigated the role of vitamin K in remyelination, by using an animal model for MS, the cuprizone model. Demyelination was induced in C57Bl6/J mice, by feeding them a special diet containing 0.3% cuprizone (w/w) for 6 weeks. After 6 weeks, cuprizone was removed from the diet and mice were allowed to remyelinate for either 1 or 3 weeks, in the absence or presence of vitamin K (i.p. phylloquinone, 2mg, three times per week). Vitamin K enhanced the production of total brain sulfatides, after both 1 week and 3 weeks of remyelination (n = 5, P-values were <0.0001), when compared with the control group. To determine whether or not there is a synergistic effect between vitamins K and D for the production of brain sulfatides, we employed a similar experiment as above. Vitamin K also increased the production of individual brain sulfatides, including d18:1/18:0, d18:1/20:0, d18:1/24:0, and d18:1/24:1 after 3 weeks of remyelination, when compared to the control group. In addition, vitamin D enhanced the production of total brain sulfatides, as well as d18:1/18:0, d18:1/24:0, and d18:1/24:1 sulfatides after 3 weeks of remyelination, but no synergistic effect between vitamins K and D for the production of total brain sulfatides was observed.
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Tarento TDC, McClure DD, Talbot AM, Regtop HL, Biffin JR, Valtchev P, Dehghani F, Kavanagh JM. A potential biotechnological process for the sustainable production of vitamin K 1. Crit Rev Biotechnol 2018; 39:1-19. [PMID: 29793354 DOI: 10.1080/07388551.2018.1474168] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The primary objective of this review is to propose an approach for the biosynthesis of phylloquinone (vitamin K1) based upon its known sources, its role in photosynthesis and its biosynthetic pathway. The chemistry, health benefits, market, and industrial production of vitamin K are also summarized. Vitamin K compounds (K vitamers) are required for the normal function of at least 15 proteins involved in diverse physiological processes such as coagulation, tissue mineralization, inflammation, and neuroprotection. Vitamin K is essential for the prevention of Vitamin K Deficiency Bleeding (VKDB), especially in neonates. Increased vitamin K intake may also reduce the severity and/or risk of bone fracture, arterial calcification, inflammatory diseases, and cognitive decline. Consumers are increasingly favoring natural food and therapeutic products. However, the bulk of vitamin K products employed for both human and animal use are chemically synthesized. Biosynthesis of the menaquinones (vitamin K2) has been extensively researched. However, published research on the biotechnological production of phylloquinone is restricted to a handful of available articles and patents. We have found that microalgae are more suitable than plant cell cultures for the biosynthesis of phylloquinone. Many algae are richer in vitamin K1 than terrestrial plants, and algal cells are easier to manipulate. Vitamin K1 can be efficiently recovered from the biomass using supercritical carbon dioxide extraction.
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Affiliation(s)
- Thomas D C Tarento
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, Australia
| | - Dale D McClure
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, Australia
| | - Andrea M Talbot
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, Australia.,Agricure Scientific Organics Pty. Ltd., Braemar, NSW, Australia
| | - Hubert L Regtop
- Agricure Scientific Organics Pty. Ltd., Braemar, NSW, Australia
| | - John R Biffin
- Agricure Scientific Organics Pty. Ltd., Braemar, NSW, Australia
| | - Peter Valtchev
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, Australia
| | - Fariba Dehghani
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, Australia
| | - John M Kavanagh
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW, Australia
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Abstract
Background Vitamin K2 (VK2) belongs to the vitamin K family and comprises a number of subtypes differing in length of side chains consisting of isoprenoid groups (menaquinone-n, MK-n). It is essential for a number of physiological functions although the full spectrum of activity has not yet been elucidated. Due to its role in protection of mitochondrial damage, VK2 could be relevant in preventing disease progress in multiple sclerosis (MS). Methods We measured VK2 serum levels by the double antibody sandwich Enzyme-linked Immunosorbent Assay (ELISA) technique in MS patients and age and sex matched controls, both under vitamin D supplementation, and related it to disease characteristics and treatment. Results Overall, 45 MS patients (31 females and 39 of the relapsing-remitting type) and 29 healthy controls (19 females) were included in the analysis. The MS patients had vastly lower VK2 blood levels than controls (235 ± 100 ng/ml vs. 812 ± 154 ng/ml, respectively). Female patients had significantly lower VK2 levels than males and a decrease with age by approximately 10% per decade was found. The VK2 levels were lower with increasing numbers of attacks per year and were higher in patients with optic nerve lesions. No consistent relationship with medications was detected. Conclusion The substantially lower levels of VK2 in MS patients could be due to depletion, lower production in the gut, diminished absorption or, less likely, reduced intake of precursor vitamin K1. The role of VK2 in MS development and progress deserves further study. Electronic supplementary material The online version of this article (10.1007/s00508-018-1328-x) contains supplementary material, which is available to authorized users.
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Wei H, Wang L, Zhao G, Fang Z, Wu H, Wang P, Zheng Z. Extraction, purification and identification of menaquinones from Flavobacterium meningosepticum fermentation medium. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Fenech M. Vitamins Associated with Brain Aging, Mild Cognitive Impairment, and Alzheimer Disease: Biomarkers, Epidemiological and Experimental Evidence, Plausible Mechanisms, and Knowledge Gaps. Adv Nutr 2017; 8:958-970. [PMID: 29141977 PMCID: PMC5682999 DOI: 10.3945/an.117.015610] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The key to preventing brain aging, mild cognitive impairment (MCI), and Alzheimer disease (AD) via vitamin intake is first to understand molecular mechanisms, then to deduce relevant biomarkers, and subsequently to test the level of evidence for the impact of vitamins in the relevant pathways and their modulation of dementia risk. This narrative review infers information on mechanisms from gene and metabolic defects associated with MCI and AD, and assesses the role of vitamins using recent results from animal and human studies. Current evidence suggests that all known vitamins and some "quasi-vitamins" are involved as cofactors or influence ≥1 of the 6 key sets of pathways or pathologies associated with MCI or AD, relating to 1) 1-carbon metabolism, 2) DNA damage and repair, 3) mitochondrial function and glucose metabolism, 4) lipid and phospholipid metabolism and myelination, 5) neurotransmitter synthesis and synaptogenesis, and 6) amyloidosis and Tau protein phosphorylation. The contemporary level of evidence for each of the vitamins varies considerably, but it is notable that B vitamins are involved as cofactors in all of the core pathways or pathologies and, together with vitamins C and E, are consistently associated with a protective role against dementia. Outcomes from recent studies indicate that the efficacy and safety of supplementation with vitamins to prevent MCI and the early stages of AD will most likely depend on 1) which pathways are defective, 2) which vitamins are deficient and could correct the relevant metabolic defects, and 3) the modulating impact of nutrient-nutrient and nutrient-genotype interaction. More focus on a precision nutrition approach is required to realize the full potential of vitamin therapy in preventing dementia and to avoid causing harm.
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Affiliation(s)
- Michael Fenech
- CSIRO Health and Biosecurity, Genome Health and Personalised Nutrition, Adelaide, South Australia, Australia
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Wei H, Zhao G, Liu H, Wang H, Ni W, Wang P, Zheng Z. A simple and efficient method for the extraction and separation of menaquinone homologs from wet biomass of Flavobacterium. Bioprocess Biosyst Eng 2017; 41:107-113. [DOI: 10.1007/s00449-017-1851-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 10/04/2017] [Indexed: 10/18/2022]
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Vitamins K1 and K2: The Emerging Group of Vitamins Required for Human Health. J Nutr Metab 2017; 2017:6254836. [PMID: 28698808 PMCID: PMC5494092 DOI: 10.1155/2017/6254836] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 05/10/2017] [Indexed: 12/21/2022] Open
Abstract
Objective To review the evidence for the use of vitamin K supplementation in clinical conditions such as osteoporosis, vascular calcification, arthritis, cancer, renal calculi, diabetes, and warfarin therapy. Quality of Evidence PubMed was searched for articles on vitamin K (K1 and K2) along with books and conference proceedings and health conditions listed above. Level I and II evidence supports the use of vitamins K1 and K2 in osteoporosis and Level II evidence supports vitamin K2 in prevention of coronary calcification and cardiovascular disease. Evidence is insufficient for use in diabetes, arthritis, renal calculi, and cancer. Main Message Vitamin K2 may be a useful adjunct for the treatment of osteoporosis, along with vitamin D and calcium, rivaling bisphosphonate therapy without toxicity. It may also significantly reduce morbidity and mortality in cardiovascular health by reducing vascular calcification. Vitamin K2 appears promising in the areas of diabetes, cancer, and osteoarthritis. Vitamin K use in warfarin therapy is safe and may improve INR control, although a dosage adjustment is required. Conclusion Vitamin K supplementation may be useful for a number of chronic conditions that are afflicting North Americans as the population ages. Supplementation may be required for bone and cardiovascular health.
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Marangoni MN, Braun D, Situ A, Moyano AL, Kalinin S, Polak P, Givogri MI, Feinstein DL. Differential effects on glial activation by a direct versus an indirect thrombin inhibitor. J Neuroimmunol 2016; 297:159-68. [PMID: 27397090 DOI: 10.1016/j.jneuroim.2016.05.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 04/13/2016] [Accepted: 05/22/2016] [Indexed: 12/21/2022]
Abstract
Thrombin is a potent regulator of brain function in health and disease, modulating glial activation and brain inflammation. Thrombin inhibitors, several of which are in clinical use as anti-coagulants, can reduce thrombin-dependent neuroinflammation in pathological conditions. However, their effects in a healthy CNS are largely unknown. In adult healthy mice, we compared the effects of treatment by the direct thrombin inhibitor dabigatran etexilate (DE), to those of warfarin, which acts by preventing vitamin K recycling essential for coagulation. After 4weeks, warfarin increased both astrocyte GFAP and microglia Iba-1 staining throughout the CNS; whereas DE reduced expression of both markers. Warfarin, but not DE, reduced sulfatide levels; and warfarin showed longer lasting changes in cerebellar gene expression. DE also reduced glial activation in a mouse model of Alzheimer's disease, although no changes in amyloid plaque burden were observed. These results suggest that treatment with direct thrombin inhibitors may be preferable to those agents which reduce vitamin K levels and have the potential to increase glial activation.
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Affiliation(s)
- M Natalia Marangoni
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - David Braun
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Annie Situ
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Ana L Moyano
- Department of Anatomy and Cell Biology, University of Illinois, Chicago, IL 60612, United States
| | - Sergey Kalinin
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Paul Polak
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Maria I Givogri
- Department of Anatomy and Cell Biology, University of Illinois, Chicago, IL 60612, United States
| | - Douglas L Feinstein
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612, United States; Department of Veterans Affairs, Jesse Brown VA Medical Center, Chicago, IL 60612, United States.
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Gentili A, Miccheli A, Tomai P, Baldassarre ME, Curini R, Pérez-Fernández V. Liquid chromatography–tandem mass spectrometry method for the determination of vitamin K homologues in human milk after overnight cold saponification. J Food Compost Anal 2016. [DOI: 10.1016/j.jfca.2015.12.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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van den Heuvel EGHM, van Schoor NM, Vermeer C, Zwijsen RML, den Heijer M, Comijs HC. Vitamin K Status Is not Associated with Cognitive Decline in Middle Aged Adults. J Nutr Health Aging 2015; 19:908-12. [PMID: 26482692 DOI: 10.1007/s12603-015-0579-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVES The aim of this study was to examine the association between dephospho-uncarboxylated matrix Gla protein (dp-ucMGP), an indicator of vitamin K status, and cognitive decline, and the modifying role of 25(OH)D. DESIGN Longitudinal study with six years follow-up. SETTING Community based. PARTICIPANTS 599 participants of the Longitudinal Aging Study Amsterdam (aged 55-65 years). MEASUREMENTS Information processing speed and a composite Z-score by combining three domains of cognition reflecting general cognitive functioning. RESULTS Generalized estimating equations (GEE) showed no significant associations between dp-ucMGP and decline in general cognitive functioning. Vitamin D modified the association between dp-ucMGP and speed of information processing (p<0.05). In the group with a 25(OH)D concentration > 50 nmol/l, the highest tertile of dp-ucMGP (>406 pmol/l), which corresponds to lower vitamin K levels, was associated with 1.5 higher score on information processing speed (p=0.023) as compared to the lowest tertile of dp-ucMGP. CONCLUSION In contrast to our hypothesis, a suboptimal vitamin K was not associated with cognitive decline in middle-aged adults.
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Affiliation(s)
- E G H M van den Heuvel
- H.C. Comijs, GGZ in Geest/ Department of Psychiatry, A.J. Ernststraat 1187, 1081 HL Amsterdam, The Netherlands. Tel.: +31-20-7885699;fax: +31-20-4446775. E-mail address:
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23
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Presse N, Belleville S, Gaudreau P, Greenwood CE, Kergoat MJ, Morais JA, Payette H, Shatenstein B, Ferland G. Vitamin K status and cognitive function in healthy older adults. Neurobiol Aging 2013; 34:2777-83. [PMID: 23850343 DOI: 10.1016/j.neurobiolaging.2013.05.031] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 04/22/2013] [Accepted: 05/30/2013] [Indexed: 12/11/2022]
Abstract
Evidence is accumulating that vitamin K could have a role in cognition, especially in aging. Using data from the Québec Longitudinal Study on Nutrition and Successful Aging (NuAge), a cross-sectional analysis was conducted to examine the associations between vitamin K status, measured as serum phylloquinone concentrations, and performance in verbal and non-verbal episodic memory, executive functions, and speed of processing. The sample included 320 men and women aged 70 to 85 years who were free of cognitive impairment. After adjustment for covariates, higher serum phylloquinone concentration (log-transformed) was associated with better verbal episodic memory performances (F = 2.43, p = 0.048); specifically with the scores (Z-transformed) on the second (β = 0.47; 95% confidence interval [CI] = 0.13-0.82), third (β = 0.41; 95% CI = 0.06-0.75), and 20-minute delayed (β = 0.47; 95% CI = 0.12-0.82) free recall trials of the RL/RI-16 Free and Cued Recall Task. No associations were found with non-verbal episodic memory, executive functions, and speed of processing. Our study adds evidence to the possible role of vitamin K in cognition during aging, specifically in the consolidation of the memory trace.
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Affiliation(s)
- Nancy Presse
- Centre de recherche, Institut Universitaire de Gériatrie de Montréal, Montréal, Quebec, Canada; Département de Nutrition, Université de Montréal, Montréal, Quebec, Canada
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24
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Assadi M, Wang DJ, Anderson K, Carran M, Bilaniuk L, Leone P. Vitamin k antagonist warfarin for palliative treatment of metachromatic leukodystrophy, a compassionate study of four subjects. J Cent Nerv Syst Dis 2012; 4:73-9. [PMID: 23650469 PMCID: PMC3619661 DOI: 10.4137/jcnsd.s9355] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
MLD is characterized by accumulation of sulfatides in the brain. Vitamin K regulates two enzymes in sphingolipid biosynthesis and warfarin is known to lower brain sulfatides in rats and mice. We hypothesized that warfarin may mitigate the MLD phenotype by reducing the formation of sulfatides. This compassionate study recruited four advanced patients with clinical, biochemical and genetic confirmation of MLD. The patients were treated with warfarin according to the approved protocol for a total of 45 days. The battery of tests included proton MR spectroscopy (H-MRS) of brain and urinary sulfatide levels recorded at defined intervals. The patients tolerated the medication and there were no bleeding complications. The urinary sulfatide levels did not decline during the study period. The H-MRS showed decreased N-acetyl aspartate and elevated myoinositol levels in the basal ganglia which remained unchanged after treatment. Our study did not demonstrate any beneficial effects of warfarin in four advanced cases of MLD. The drug intervention however, was safe and deserves further evaluation through a larger study of longer duration. The metabolite abnormalities reported on H-MRS may be useful in longitudinal follow up of patients with MLD during drug trials.
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25
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Shearer MJ, Fu X, Booth SL. Vitamin K nutrition, metabolism, and requirements: current concepts and future research. Adv Nutr 2012; 3:182-95. [PMID: 22516726 PMCID: PMC3648719 DOI: 10.3945/an.111.001800] [Citation(s) in RCA: 156] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In 2001, the US Food and Nutrition Board concluded that there were insufficient data with which to establish a RDA for vitamin K, in large part because of a lack of robust endpoints that reflected adequacy of intake. Knowledge of the relative bioavailability of multiple vitamin K forms was also poor. Since then, stable isotope methodologies have been applied to the assessment of the bioavailability of the major dietary form of vitamin K in its free state and when incorporated into a plant matrix. There is a need for stable isotope studies with enhanced sensitivity to expand knowledge of the bioavailability, absorption, disposition, and metabolism of different molecular forms of vitamin K. Another area for future research stems from evidence that common polymorphisms or haplotypes in certain key genes implicated in vitamin K metabolism might affect nutritional requirements. Thus far, much of this evidence is indirect via effects on warfarin dose requirements. In terms of clinical endpoints, vitamin K deficiency in early infancy continues to be a leading cause of intracranial bleeding even in developed countries and the reasons for its higher prevalence in certain Asian countries has not been solved. There is universal consensus for the need for vitamin K prophylaxis in newborns, but the effectiveness of any vitamin K prophylactic regimen needs to be based on sound nutritional principles. In contrast, there is still a lack of suitable biomarkers or clinical endpoints that can be used to determine vitamin K requirements among adults.
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Affiliation(s)
- Martin J. Shearer
- Haemostasis Research Unit, Centre for Haemostasis and Thrombosis, Guy’s and St Thomas’ NHS Foundation Trust, and King’s College, London, UK; and,To whom correspondence should be addressed. E-mail:
| | - Xueyan Fu
- Haemostasis Research Unit, Centre for Haemostasis and Thrombosis, Guy’s and St Thomas’ NHS Foundation Trust, and King’s College, London, UK; and
| | - Sarah L. Booth
- Haemostasis Research Unit, Centre for Haemostasis and Thrombosis, Guy’s and St Thomas’ NHS Foundation Trust, and King’s College, London, UK; and
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Carrié I, Bélanger E, Portoukalian J, Rochford J, Ferland G. Lifelong low-phylloquinone intake is associated with cognitive impairments in old rats. J Nutr 2011; 141:1495-501. [PMID: 21653572 DOI: 10.3945/jn.110.137638] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
In a previous report, we showed vitamin K to preferentially accumulate in brain regions rich in white matter and to positively correlate with certain sphingolipids. In rodents, pharmacological vitamin K deficiency has resulted in behavioral perturbations. To gain insight on the role of vitamin K status on brain function, we investigated learning abilities (Morris water maze), motor activity (open field), and anxiety (elevated plus maze) in distinct groups of 6-, 12-, and 20-mo-old female Sprague-Dawley rats that had been fed diets containing low (L; ~80 μg/kg diet), adequate (A; ~500 μg/kg diet), or high (H; ~2000 μg/kg diet) levels of phylloquinone (μg/kg diet; n = 9-12/diet) since weaning. In 20-mo-old rats, sphingolipids (cerebroside, sulfatide, sphingomyelin, ceramide, and gangliosides), phylloquinone, and menaquinone-4 were also assessed in cerebellum, midbrain, pons medulla, striatum, and hippocampus. Lifetime consumption of a low-vitamin K diet resulted in cognitive deficits in the 20-mo-old rats, with those in the L group having longer latencies than those in the H group (P < 0.05); this was associated with higher concentrations of ceramides in the hippocampus (P < 0.05) and lower gangliosides in the pons medulla and midbrain (P < 0.05). The low-vitamin K diet did not affect cognition at 6 and 12 mo of age, nor did it affect motor activity or anxiety at any age. Although much remains to be elucidated about the mechanism of action of vitamin K in cognition, this report points to vitamin K as an important nutritional factor contributing to cognitive health during aging.
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Affiliation(s)
- Isabelle Carrié
- Département de Nutrition, Université de Montréal, Montréal H3C 3J7, QC, Canada
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Nowicka B, Kruk J. Occurrence, biosynthesis and function of isoprenoid quinones. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2010; 1797:1587-605. [PMID: 20599680 DOI: 10.1016/j.bbabio.2010.06.007] [Citation(s) in RCA: 303] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 06/09/2010] [Accepted: 06/14/2010] [Indexed: 12/23/2022]
Abstract
Isoprenoid quinones are one of the most important groups of compounds occurring in membranes of living organisms. These compounds are composed of a hydrophilic head group and an apolar isoprenoid side chain, giving the molecules a lipid-soluble character. Isoprenoid quinones function mainly as electron and proton carriers in photosynthetic and respiratory electron transport chains and these compounds show also additional functions, such as antioxidant function. Most of naturally occurring isoprenoid quinones belong to naphthoquinones or evolutionary younger benzoquinones. Among benzoquinones, the most widespread and important are ubiquinones and plastoquinones. Menaquinones, belonging to naphthoquinones, function in respiratory and photosynthetic electron transport chains of bacteria. Phylloquinone K(1), a phytyl naphthoquinone, functions in the photosynthetic electron transport in photosystem I. Ubiquinones participate in respiratory chains of eukaryotic mitochondria and some bacteria. Plastoquinones are components of photosynthetic electron transport chains of cyanobacteria and plant chloroplasts. Biosynthetic pathway of isoprenoid quinones has been described, as well as their additional, recently recognized, diverse functions in bacterial, plant and animal metabolism.
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Affiliation(s)
- Beatrycze Nowicka
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
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Age- and brain region-specific effects of dietary vitamin K on myelin sulfatides. J Nutr Biochem 2010; 21:1083-8. [PMID: 20092997 DOI: 10.1016/j.jnutbio.2009.09.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2009] [Revised: 07/13/2009] [Accepted: 09/17/2009] [Indexed: 02/06/2023]
Abstract
Dysregulation of myelin sulfatides is a risk factor for cognitive decline with age. Vitamin K is present in high concentrations in the brain and has been implicated in the regulation of sulfatide metabolism. Our objective was to investigate the age-related interrelation between dietary vitamin K and sulfatides in myelin fractions isolated from the brain regions of Fischer 344 male rats fed one of two dietary forms of vitamin K: phylloquinone or its hydrogenated form, 2',3'-dihydrophylloquinone (dK), for 28 days. Both dietary forms of vitamin K were converted to menaquinone-4 (MK-4) in the brain. The efficiency of dietary dK conversion to MK-4 compared to dietary phylloquinone was lower in the striatum and cortex, and was similar to that in the hippocampus. There were significant positive correlations between sulfatides and MK-4 in the hippocampus (phylloquinone-supplemented diet, 12 and 24 months; dK-supplemented diet, 12 months) and cortex (phylloquinone-supplemented diet, 12 and 24 months). No significant correlations were observed in the striatum. Furthermore, sulfatides in the hippocampus were significantly positively correlated with MK-4 in serum. This is the first attempt to establish and characterize a novel animal model that exploits the inability of dietary dK to convert to brain MK-4 to study the dietary effects of vitamin K on brain sulfatide in brain regions controlling motor and cognitive functions. Our findings suggest that this animal model may be useful for investigation of the effect of the dietary vitamin K on sulfatide metabolism, myelin structure and behavior functions.
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Abstract
There is a growing awareness that natural vitamins (with the only exception of pantothenic acid) positively or negatively modulate the synthesis of some cytokines and growth factors in the CNS, and various mammalian cells and organs. As natural vitamins are micronutrients in the human diet, studying their effects can be considered a part of nutritional genomics or nutrigenomics. A given vitamin selectively modifies the synthesis of only a few cytokines and/or growth factors, although the same cytokine and/or growth factor may be regulated by more than one vitamin. These effects seem to be independent of the effects of vitamins as coenzymes and/or reducing agents, and seem to occur mainly at genomic and/or epigenetic level, and/or by modulating NF-kappaB activity. Although most of the studies reviewed here have been based on cultured cell lines, but their findings have been confirmed by some key in vivo studies. The CNS seems to be particularly involved and is severely affected by most avitaminoses, especially in the case of vitamin B(12). However, the vitamin-induced changes in cytokine and growth factor synthesis may initiate a cascade of events that can affect the function, differentiation, and morphology of the cells and/or structures not only in the CNS, but also elsewhere because most natural vitamins, cytokines, and growth factors cross the blood-brain barrier. As cytokines are essential to CNS-immune and CNS-hormone system communications, natural vitamins also interact with these circuits. Further studies of such vitamin-mediated effects could lead to vitamins being used for the treatment of diseases which, although not true avitaminoses, involve an imbalance in cytokine and/or growth factor synthesis.
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Affiliation(s)
- Giuseppe Scalabrino
- Laboratory of Neuropathology, 'Città Studi' Department, Faculty of Medicine and Surgery, University of Milan, Milan, Italy.
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Presse N, Shatenstein B, Kergoat MJ, Ferland G. Low Vitamin K Intakes in Community-Dwelling Elders at an Early Stage of Alzheimer's Disease. ACTA ACUST UNITED AC 2008; 108:2095-9. [DOI: 10.1016/j.jada.2008.09.013] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Accepted: 05/23/2008] [Indexed: 02/07/2023]
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Booth SL, Peterson JW, Smith D, Shea MK, Chamberland J, Crivello N. Age and dietary form of vitamin K affect menaquinone-4 concentrations in male Fischer 344 rats. J Nutr 2008; 138:492-6. [PMID: 18287355 DOI: 10.1093/jn/138.3.492] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Phylloquinone, the primary dietary form of vitamin K, is converted to menaquinone-4 (MK-4) in certain tissues. MK-4 may have tissue-specific roles independent of those traditionally identified with vitamin K. Fischer 344 male rats of different ages (2, 12, and 24 mo, n = 20 per age group) were used to compare the conversion of phylloquinone to MK-4 with an equivalent dose of another dietary form of vitamin K, 2',3'-dihydrophylloquinone. Rats were age- and diet-group pair-fed phylloquinone (198 +/- 9.0 microg/kg diet) or dihydrophylloquinone (172 +/- 13.0 microg/kg diet) for 28 d. MK-4 was the primary form of vitamin K in serum, spleen, kidney, testes, bone marrow, and brain myelin fractions, regardless of age group. MK-4 concentrations were significantly lower in kidney, heart, testes, cortex (myelin), and striatum (myelin) in the dihydrophylloquinone diet group compared with the phylloquinone diet group (P < 0.05). The MK-4 concentrations in 2-mo-old rats were lower in liver, spleen, kidney, heart, and cortex (myelin) but higher in testes compared with 24-mo-old rats (P < 0.05). However, there were no age-specific differences in MK-4 concentrations among the rats fed the 2 diets. These data suggest that dihydrophylloquinone, which differs from phylloquinone in its side phytyl chain, is absorbed but its intake results in less MK-4 in certain tissues. Dihydrophylloquinone may be used in models for the study of tissue-specific vitamin K deficiency.
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Affiliation(s)
- Sarah L Booth
- Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, MA 02111, USA.
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Raghav S, Reutens D. Neurological sequelae of intrauterine warfarin exposure. J Clin Neurosci 2006; 14:99-103. [PMID: 17107801 DOI: 10.1016/j.jocn.2006.03.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Accepted: 03/08/2006] [Indexed: 11/24/2022]
Abstract
Warfarin embryopathy is a well-defined manifestation of intrauterine warfarin exposure. The embryopathy phenotype as it relates to the nervous system is broad and poorly recognised. We describe an adult with neurological sequelae of fetal warfarin exposure. We review previous cases with neurological sequelae and discuss the pathogenetic mechanism in light of recent research.
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Affiliation(s)
- Sanjay Raghav
- Department of Neurology, Monash Medical Centre, 246 Clayton Road, Clayton, Victoria 3168, Australia
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