1
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Hwang SB, Choi MJ, Lee HJ, Han JJ. Safety evaluation of vitamin K2 (menaquinone-7) via toxicological tests. Sci Rep 2024; 14:5440. [PMID: 38443482 PMCID: PMC10914784 DOI: 10.1038/s41598-024-56151-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 03/01/2024] [Indexed: 03/07/2024] Open
Abstract
This study aims to evaluate the safety of MK-7 produced by fermentation process using a Bacillus subtilis var. natto strain for human ingestion via acute oral toxicity, repeated dose 90-day oral toxicity, 28-day recovery test, and genotoxicity tests. The acute oral toxicity test results indicated that all subjects survived at the dose of 5000 mg/kg with no toxic effects. For the repeated dose 90-day oral toxicity test, MK-7 was administered to rats at 500, 1500, and 4500 mg/kg for 90 d. No abnormal findings were detected in clinical observations or in clinical pathological and histopathological examinations. The no-observed-adverse-effect level(NOAEL) was determined to be 4500 mg/kg/d, the maximum dose tested. For the evaluation of genotoxicity, reverse mutation, chromosomal aberration, and micronucleus tests were performed. In the reversion mutation test, vitamin K2 did not induce reversion in bacterial strains, and no chromosomal abnormality was observed in the chromosomal abnormality test using Chinese hamster lung cells. In the micronucleus test, micronuclei were not induced using ICR mouse bone marrow cells. All the toxicity test results suggest that vitamin K2 produced by fermentation processes using Bacillus subtilis var. natto induced no toxicological changes under the experimental conditions.
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Affiliation(s)
- Sung-Bong Hwang
- Department of Quality, GF Fermentech, Inc., Sejong, 30077, South Korea
| | - Min-Ju Choi
- Department of Quality, GF Fermentech, Inc., Sejong, 30077, South Korea
| | - Hyeon-Jeong Lee
- Department of Quality, GF Fermentech, Inc., Sejong, 30077, South Korea
| | - Jeong-Jun Han
- GF Fermentech, Inc., R&D Institute, Daejon, South Korea.
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2
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Yang W, Wang Y, Liu L, Liu L, Li S, Li Y. Protective Effect of Vitamin K2 (MK-7) on Acute Lung Injury Induced by Lipopolysaccharide in Mice. Curr Issues Mol Biol 2024; 46:1700-1712. [PMID: 38534726 DOI: 10.3390/cimb46030110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/16/2024] [Accepted: 02/17/2024] [Indexed: 03/28/2024] Open
Abstract
Vitamin K2 (MK-7) has been shown to cause significant changes in different physiological processes and diseases, but its role in acute lung injury (ALI) is unclear. Therefore, in this study, we aimed to evaluate the protective effects of VK2 against LPS-induced ALI in mice. The male C57BL/6J mice were randomly divided into six groups (n = 7): the control group, LPS group, negative control group (LPS + Oil), positive control group (LPS + DEX), LPS + VK2 (L) group (VK2, 1.5 mg/kg), and LPS + VK2 (H) group (VK2, 15 mg/kg). Hematoxylin-eosin (HE) staining of lung tissue was performed. Antioxidant superoxide dismutase (SOD) and total antioxidant capacity (T-AOC) activities, and the Ca2+ level in the lung tissue were measured. The effects of VK2 on inflammation, apoptosis, tight junction (TJ) injury, mitochondrial dysfunction, and autophagy were quantitatively assessed using Western blot analysis. Compared with the LPS group, VK2 improved histopathological changes; alleviated inflammation, apoptosis, and TJ injury; increased antioxidant enzyme activity; reduced Ca2+ overload; regulated mitochondrial function; and inhibited lung autophagy. These results indicate that VK2 could improve tight junction protein loss, inflammation, and cell apoptosis in LPS-induced ALI by inhibiting the mitochondrial dysfunction and excessive autophagy, indicating that VK2 plays a beneficial role in ALI and might be a potential therapeutic strategy.
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Affiliation(s)
- Weidong Yang
- College of Basic Medical Science, Dalian Medical University, Dalian 116041, China
| | - Yulian Wang
- College of Basic Medical Science, Dalian Medical University, Dalian 116041, China
| | - Lulu Liu
- College of Basic Medical Science, Dalian Medical University, Dalian 116041, China
| | - Lihong Liu
- College of Basic Medical Science, Dalian Medical University, Dalian 116041, China
| | - Shuzhuang Li
- College of Basic Medical Science, Dalian Medical University, Dalian 116041, China
| | - Yuyuan Li
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian 116041, China
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3
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Du F, Yan M, Duan L, Xie G, Yao X, Hu W, Liu Y, Meng M, Chen J, Shao D. The study of bioavailability and endogenous circadian rhythm of menaquinone-7, a form of vitamin K 2, in healthy subjects. Br J Nutr 2023; 130:1885-1897. [PMID: 37132123 DOI: 10.1017/s0007114523001034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Menaquinone-7 (MK-7), a multipotent vitamin K2, possesses a wide range of biological activities, a precise curative effect and excellent safety. A simple and rapid LC-APCI-MS/MS method for the determination of MK-7 in human plasma with single liquid-liquid extraction (LLE) extraction and 4·5-min analysis time has been developed and validated. Four per cent bovine serum albumin (BSA) was used as surrogate matrix for standard curves and endogenous baseline subtraction. This method was reproducible and reliable and was used to analyse of MK-7 in human plasma. The endogenous circadian rhythm and bioavailability of MK-7 were investigated in two randomised single-dose, open, one-way clinical trials (Study I and Study II). A total of five healthy male subjects were enrolled in Study I and 12 healthy male subjects in Study II. Single-dose (1 mg) of MK-7 was given to each subject under fasting condition, and all eligible subjects were given a restricting VK2 diet for 4 d prior to drug administration and during the trial. The experiment results of Study I demonstrated that endogenous MK-7 has no circadian rhythm in individuals. Both studies showed MK-7 are absorbed with peak plasma concentrations at about 6 h after intake and has a very long half-life time.
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Affiliation(s)
- Fan Du
- Chonggang General Hospital, Chongqing, People's Republic of China
| | - Min Yan
- Chongqing Denali Medpharma, Co., Ltd, Chongqing, People's Republic of China
| | - Lili Duan
- Guangdong Sungen Biotech, Co., Ltd, Shantou, People's Republic of China
| | - Guolong Xie
- Chonggang General Hospital, Chongqing, People's Republic of China
| | - Xiuhua Yao
- Chonggang General Hospital, Chongqing, People's Republic of China
| | - Wenjing Hu
- Chonggang General Hospital, Chongqing, People's Republic of China
| | - Yu Liu
- Chongqing Denali Medpharma, Co., Ltd, Chongqing, People's Republic of China
| | - Min Meng
- Chongqing Denali Medpharma, Co., Ltd, Chongqing, People's Republic of China
| | - Jiepeng Chen
- Guangdong Sungen Biotech, Co., Ltd, Shantou, People's Republic of China
| | - Di Shao
- Chonggang General Hospital, Chongqing, People's Republic of China
- Chongqing University Central Hospital, Chongqing Emergency Medical Center, Chongqing, People's Republic of China
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4
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Hasific S, Øvrehus KA, Hosbond S, Lambrechtsen J, Kumarathurai P, Mejldal A, Ravn EJ, Rasmussen LM, Gerke O, Mickley H, Diederichsen A. Effects of vitamins K2 and D3 supplementation in patients with severe coronary artery calcification: a study protocol for a randomised controlled trial. BMJ Open 2023; 13:e073233. [PMID: 37451735 PMCID: PMC10351276 DOI: 10.1136/bmjopen-2023-073233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023] Open
Abstract
INTRODUCTION Coronary artery calcification (CAC) and especially progression in CAC is a strong predictor of acute myocardial infarction and cardiovascular mortality. Supplementation with vitamin K2 and D3 has been suggested to have a protective role in the progression of CAC. In this study, we will examine the effect of vitamins K2 and D3 in men and women with severe CAC. We hypothesise that supplementation with vitamins K2 and D3 will slow down the calcification process. METHOD AND ANALYSIS In this multicentre and double-blinded placebo-controlled study, 400 men and women with CAC score≥400 are randomised (1:1) to treatment with vitamin K2 (720 µg/day) and vitamin D3 (25 µg/day) or placebo treatment (no active treatment) for 2 years. Among exclusion criteria are treatment with vitamin K antagonist, coagulation disorders and prior coronary artery disease. To evaluate progression in coronary plaque, a cardiac CT-scan is performed at baseline and repeated after 12 and 24 months of follow-up. Primary outcome is progression in CAC score from baseline to follow-up at 2 years. Among secondary outcomes are coronary plaque composition and cardiac events. Intention-to-treat principle is used for all analyses. ETHICS AND DISSEMINATION There are so far no reported adverse effects associated with the use of vitamin K2. The protocol was approved by the Regional Scientific Ethical Committee for Southern Denmark and the Data Protection Agency. It will be conducted in accordance with the Declaration of Helsinki. Positive as well as negative findings will be reported. TRIAL REGISTRATION NUMBER NCT05500443.
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Affiliation(s)
- Selma Hasific
- Department of Cardiology, Odense University Hospital, Odense, Denmark
| | | | - Susanne Hosbond
- Department of Cardiology, Sygehus Lillebalt, Vejle, Syddanmark, Denmark
| | | | | | - Anna Mejldal
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Open Patient Data Explorative Network, Odense University, Odense, Denmark
| | | | - Lars Melholt Rasmussen
- Department of Clinical Biochemistry and Pharmacology, Odense Universitetshospital, Odense, Denmark
- Centre for Individualised Medicine in Arterial Diseases, Odense Universitetshospital, Odense, Denmark
| | - Oke Gerke
- Department of Nuclear Medicine, Odense University Hospital, Odense, Denmark
| | - Hans Mickley
- Department of Cardiology, Odense University Hospital, Odense, Denmark
| | - Axel Diederichsen
- Department of Cardiology, Odense University Hospital, Odense, Denmark
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5
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Zhang Y, Liu L, Wei C, Wang X, Li R, Xu X, Zhang Y, Geng G, Dang K, Ming Z, Tao X, Xu H, Yan X, Zhang J, Hu J, Li Y. Vitamin K2 supplementation improves impaired glycemic homeostasis and insulin sensitivity for type 2 diabetes through gut microbiome and fecal metabolites. BMC Med 2023; 21:174. [PMID: 37147641 PMCID: PMC10163743 DOI: 10.1186/s12916-023-02880-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 04/25/2023] [Indexed: 05/07/2023] Open
Abstract
BACKGROUND There is insufficient evidence for the ability of vitamin K2 to improve type 2 diabetes mellitus symptoms by regulating gut microbial composition. Herein, we aimed to demonstrate the key role of the gut microbiota in the improvement of impaired glycemic homeostasis and insulin sensitivity by vitamin K2 intervention. METHODS We first performed a 6-month RCT on 60 T2DM participants with or without MK-7 (a natural form of vitamin K2) intervention. In addition, we conducted a transplantation of the MK-7-regulated microbiota in diet-induced obesity mice for 4 weeks. 16S rRNA sequencing, fecal metabolomics, and transcriptomics in both study phases were used to clarify the potential mechanism. RESULTS After MK-7 intervention, we observed notable 13.4%, 28.3%, and 7.4% reductions in fasting serum glucose (P = 0.048), insulin (P = 0.005), and HbA1c levels (P = 0.019) in type 2 diabetes participants and significant glucose tolerance improvement in diet-induced obesity mice (P = 0.005). Moreover, increased concentrations of secondary bile acids (lithocholic and taurodeoxycholic acid) and short-chain fatty acids (acetic acid, butyric acid, and valeric acid) were found in human and mouse feces accompanied by an increased abundance of the genera that are responsible for the biosynthesis of these metabolites. Finally, we found that 4 weeks of fecal microbiota transplantation significantly improved glucose tolerance in diet-induced obesity mice by activating colon bile acid receptors, improving host immune-inflammatory responses, and increasing circulating GLP-1 concentrations. CONCLUSIONS Our gut-derived findings provide evidence for a regulatory role of vitamin K2 on glycemic homeostasis, which may further facilitate the clinical implementation of vitamin K2 intervention for diabetes management. TRIAL REGISTRATION The study was registered at https://www.chictr.org.cn (ChiCTR1800019663).
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Affiliation(s)
- Yuntao Zhang
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Lin Liu
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Chunbo Wei
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Xuanyang Wang
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Ran Li
- Department of Nutrition, the Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xiaoqing Xu
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Yingfeng Zhang
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Guannan Geng
- Department of Endocrinology, the First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Keke Dang
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Zhu Ming
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Xinmiao Tao
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Huan Xu
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Xuemin Yan
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Jia Zhang
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Jinxia Hu
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China
| | - Ying Li
- Department of Nutrition and Food Hygiene, the National Key Discipline, School of Public Health, Harbin Medical University, Harbin, China.
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6
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Lal N, Seifan M, Berenjian A. Optimisation of the fermentation media to enhance the production of the bioactive isomer of vitamin menaquinone-7. Bioprocess Biosyst Eng 2022; 45:1371-1390. [PMID: 35864383 PMCID: PMC9302956 DOI: 10.1007/s00449-022-02752-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 06/22/2022] [Indexed: 11/30/2022]
Abstract
Menaquinone-7 (MK-7) offers significant health benefits; however, only the all-trans form is biologically active. MK-7 produced through fermentation can occur as all-trans and cis isomers, and the therapeutic value of the resulting MK-7 is exclusively determined by the quantity of the all-trans isomer. Therefore, this study aimed to investigate the effect of the media composition on the isomer profile obtained from fermentation and determine the optimum media combination to increase the concentration of the all-trans isomer and diminish the production of cis MK-7. For this purpose, design of experiments (DOE) was used to screen the most effective nutrients, and a central composite face-centred design (CCF) was employed to optimise the media components. The optimum media consisted of 1% (w/v) glucose, 2% (w/v) yeast extract, 2% (w/v) soy peptone, 2% (w/v) tryptone, and 0.1% (w/v) CaCl2. This composition resulted in an average all-trans and cis isomer concentration of 36.366 mg/L and 1.225 mg/L, respectively. In addition, the optimised media enabled an all-trans isomer concentration 12.2-fold greater and a cis isomer concentration 2.9-fold less than the unoptimised media. This study was the first to consider the development of an optimised fermentation media to enhance the production of the bioactive isomer of MK-7 and minimise the concentration of the inactive isomer. Furthermore, this media is commercially promising, as it will improve the process productivity and reduce the costs associated with the industrial fermentation of the vitamin.
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Affiliation(s)
- Neha Lal
- School of Engineering, The University of Waikato, Hamilton, 3240, New Zealand
| | - Mostafa Seifan
- School of Engineering, The University of Waikato, Hamilton, 3240, New Zealand
| | - Aydin Berenjian
- School of Engineering, The University of Waikato, Hamilton, 3240, New Zealand. .,Department of Agricultural and Biological Engineering, Pennsylvania State University, 221 Agricultural Engineering Building, University Park, PA, 16802, USA.
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7
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Roumeliotis S, Duni A, Vaios V, Kitsos A, Liakopoulos V, Dounousi E. Vitamin K Supplementation for Prevention of Vascular Calcification in Chronic Kidney Disease Patients: Are We There Yet? Nutrients 2022; 14:nu14050925. [PMID: 35267901 PMCID: PMC8912443 DOI: 10.3390/nu14050925] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/07/2022] [Accepted: 02/19/2022] [Indexed: 02/04/2023] Open
Abstract
Chronic Kidney Disease (CKD) patients are at high risk of presenting with arterial calcification or stiffness, which confers increased cardiovascular mortality and morbidity. In recent years, it has become evident that VC is an active process regulated by various molecules that may act as inhibitors of vessel mineralization. Matrix Gla Protein (MGP), one the most powerful naturally occurring inhibitors of arterial calcification, requires vitamin K as a co-factor in order to undergo post-translational γ-carboxylation and phosphrorylation and become biologically active. The inactive form of MGP (dephosphorylated, uncarboxylated dp-ucMGP) reflects vitamin K deficiency and has been repeatedly associated with surrogate markers of VC, stiffness, and cardiovascular outcomes in CKD populations. As CKD is a state of progressive vitamin K depletion and VC, research has focused on clinical trials aiming to investigate the possible beneficial effects of vitamin K in CKD and dialysis patients. In this study, we aim to review the current evidence regarding vitamin K supplementation in uremic patients.
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Affiliation(s)
- Stefanos Roumeliotis
- Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (S.R.); (V.V.); (V.L.)
| | - Anila Duni
- Department of Nephrology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece; (A.D.); (A.K.)
| | - Vasilios Vaios
- Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (S.R.); (V.V.); (V.L.)
| | - Athanasios Kitsos
- Department of Nephrology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece; (A.D.); (A.K.)
| | - Vassilios Liakopoulos
- Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece; (S.R.); (V.V.); (V.L.)
| | - Evangelia Dounousi
- Department of Nephrology, Faculty of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece; (A.D.); (A.K.)
- Correspondence: ; Tel.: +30-2651007429
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8
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Hariri E, Kassis N, Iskandar JP, Schurgers LJ, Saad A, Abdelfattah O, Bansal A, Isogai T, Harb SC, Kapadia S. Vitamin K 2-a neglected player in cardiovascular health: a narrative review. Open Heart 2021; 8:openhrt-2021-001715. [PMID: 34785587 PMCID: PMC8596038 DOI: 10.1136/openhrt-2021-001715] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 10/04/2021] [Indexed: 12/15/2022] Open
Abstract
Vitamin K2 serves an important role in cardiovascular health through regulation of calcium homeostasis. Its effects on the cardiovascular system are mediated through activation of the anti-calcific protein known as matrix Gla protein. In its inactive form, this protein is associated with various markers of cardiovascular disease including increased arterial stiffness, vascular and valvular calcification, insulin resistance and heart failure indices which ultimately increase cardiovascular mortality. Supplementation of vitamin K2 has been strongly associated with improved cardiovascular outcomes through its modification of systemic calcification and arterial stiffness. Although its direct effects on delaying the progression of vascular and valvular calcification is currently the subject of multiple randomised clinical trials, prior reports suggest potential improved survival among cardiac patients with vitamin K2 supplementation. Strengthened by its affordability and Food and Drug Adminstration (FDA)-proven safety, vitamin K2 supplementation is a viable and promising option to improve cardiovascular outcomes.
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Affiliation(s)
- Essa Hariri
- Department of Internal Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Nicholas Kassis
- Department of Internal Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Jean-Pierre Iskandar
- Department of Internal Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Leon J Schurgers
- Biochemistry, Maastricht University CARIM School for Cardiovascular Diseases, Maastricht, The Netherlands
| | - Anas Saad
- Department of Cardiovascular Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Omar Abdelfattah
- Department of Cardiovascular Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA.,Department of Cardiovascular Medicine, Morristown Medical Center, Morristown, New Jersey, USA
| | - Agam Bansal
- Department of Internal Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Toshiaki Isogai
- Department of Cardiovascular Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Serge C Harb
- Department of Internal Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Samir Kapadia
- Department of Cardiovascular Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
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9
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Roumeliotis S, Roumeliotis A, Dounousi E, Eleftheriadis T, Liakopoulos V. Vitamin K for the Treatment of Cardiovascular Disease in End-Stage Renal Disease Patients: Is there Hope? Curr Vasc Pharmacol 2021; 19:77-90. [PMID: 32196451 DOI: 10.2174/1570161118666200320111745] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 02/24/2020] [Accepted: 02/25/2020] [Indexed: 01/07/2023]
Abstract
In Chronic Kidney Disease, vascular calcification (VC) is highly prevalent even at early stages and is gradually enhanced, along with disease progression to End-Stage Renal Disease (ESRD). The calcification pattern in uremia includes all types of mineralization and contributes to the heavy cardiovascular (CV) burden that is common in these patients. Ectopic mineralization is the result of the imbalance between inhibitors and promoters of vascular calcification, with the latter overwhelming the former. The most powerful, natural inhibitor of calcification is Matrix Gla Protein (MGP), a small vitamin K dependent protein, secreted by chondrocytes and vascular smooth muscle cells. In uremia, MGP was reported as the only molecule able to reverse VC by "sweeping" calcium and hydroxyapatite crystals away from the arterial wall. To become biologically active, this protein needs to undergo carboxylation and phosphorylation, reactions highly dependent on vitamin K status. The inactive form of MGP reflects the deficiency of vitamin K and has been associated with CV events and mortality in ESRD patients. During the past decade, vitamin K status has emerged as a novel risk factor for vascular calcification and CV disease in various populations, including dialysis patients. This review presents evidence regarding the association between vitamin K and CV disease in ESRD patients, which are prone to atherosclerosis and atheromatosis.
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Affiliation(s)
- Stefanos Roumeliotis
- Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Athanasios Roumeliotis
- Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Evangelia Dounousi
- Department of Nephrology, Medical School, University Hospital of Ioannina, Ioannina, Greece
| | | | - Vassilios Liakopoulos
- Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
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10
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Xu W, Wu H, Chen S, Wang X, Tanaka S, Sugiyama K, Yamada H, Hirano T. Cytotoxic effects of vitamins K1, K2, and K3 against human T lymphoblastoid leukemia cells through apoptosis induction and cell cycle arrest. Chem Biol Drug Des 2020; 96:1134-1147. [PMID: 32305047 DOI: 10.1111/cbdd.13696] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/30/2020] [Accepted: 04/13/2020] [Indexed: 02/06/2023]
Abstract
The present study was undertaken to evaluate cytotoxic effects of vitamin K1 (phylloquinone), vitamin K2 (menaquinones), and vitamin K3 (menadione) against human T lymphoblastoid leukemia cells, Jurkat T cells, MOLT-4 cells, and P-glycoprotein-expressing multidrug-resistant MOLT-4/DNR cells. Vitamins K2 and K3, but not vitamin K1, reduced viabilities of Jurkat, MOLT-4, and MOLT-4/DNR cells. The influence potency of vitamin K3 was larger than that of vitamin K2 in all of the three cell lines. MOLT-4/DNR cells seemed to be more sensitive toward the effects of vitamins K2 and K3. The cytotoxicity of vitamins K2 and K3 on these leukemia cells seems to be related to apoptosis induction and cell cycle arrest. Vitamin K2 and K3 treatment induced cleavage of PARP obviously. Moreover, vitamins K2 and K3 specifically down-regulated the expressions of cyclin A2 in all of the three cell lines. However, the effects of vitamins K2 and K3 on the cell cycle profiling in Jurkat, MOLT-4, and MOLT-4/DNR cells varied with the cell type. Vitamins K2 and K3 also decreased the viability of mitogen-activated human peripheral blood mononuclear cells. Our observations suggest that vitamins K2 and K3 have bilateral cytotoxic effects on activated human peripheral lymphocytes and the human leukemic T cells.
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Affiliation(s)
- Wencheng Xu
- Department of Pharmacy, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China.,Institute of Traditional Chinese Medicine, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, China
| | - Hongguang Wu
- Department of Clinical Pharmacology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Shuhe Chen
- Department of Pharmacy, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China.,Institute of Traditional Chinese Medicine, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, China
| | - Xiaoqin Wang
- Institute of Traditional Chinese Medicine, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, China.,Department of Nephrology, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China
| | - Sachiko Tanaka
- Department of Clinical Pharmacology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Kentaro Sugiyama
- Department of Clinical Pharmacology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Haruki Yamada
- Department of Clinical Pharmacology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Toshihiko Hirano
- Department of Clinical Pharmacology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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11
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Akbulut AC, Pavlic A, Petsophonsakul P, Halder M, Maresz K, Kramann R, Schurgers L. Vitamin K2 Needs an RDI Separate from Vitamin K1. Nutrients 2020; 12:E1852. [PMID: 32575901 PMCID: PMC7353270 DOI: 10.3390/nu12061852] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 02/06/2023] Open
Abstract
Vitamin K and its essential role in coagulation (vitamin K [Koagulation]) have been well established and accepted the world over. Many countries have a Recommended Daily Intake (RDI) for vitamin K based on early research, and its necessary role in the activation of vitamin K-dependent coagulation proteins is known. In the past few decades, the role of vitamin K-dependent proteins in processes beyond coagulation has been discovered. Various isoforms of vitamin K have been identified, and vitamin K2 specifically has been highlighted for its long half-life and extrahepatic activity, whereas the dietary form vitamin K1 has a shorter half-life. In this review, we highlight the specific activity of vitamin K2 based upon proposed frameworks necessary for a bioactive substance to be recommended for an RDI. Vitamin K2 meets all these criteria and should be considered for a specific dietary recommendation intake.
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Affiliation(s)
- Asim Cengiz Akbulut
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, 6200MD Maastricht, The Netherlands; (A.C.A.); (A.P.); (P.P.)
| | - Angelina Pavlic
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, 6200MD Maastricht, The Netherlands; (A.C.A.); (A.P.); (P.P.)
| | - Ploingarm Petsophonsakul
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, 6200MD Maastricht, The Netherlands; (A.C.A.); (A.P.); (P.P.)
| | - Maurice Halder
- Division of Nephrology, RWTH Aachen University, 52074 Aachen, Germany; (M.H.); (R.K.)
| | - Katarzyna Maresz
- International Science & Health Foundation, 30-134 Krakow, Poland;
| | - Rafael Kramann
- Division of Nephrology, RWTH Aachen University, 52074 Aachen, Germany; (M.H.); (R.K.)
| | - Leon Schurgers
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, 6200MD Maastricht, The Netherlands; (A.C.A.); (A.P.); (P.P.)
- Division of Nephrology, RWTH Aachen University, 52074 Aachen, Germany; (M.H.); (R.K.)
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12
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Farhadi Moghadam B, Fereidoni M. Neuroprotective effect of menaquinone-4 (MK-4) on transient global cerebral ischemia/reperfusion injury in rat. PLoS One 2020; 15:e0229769. [PMID: 32150581 PMCID: PMC7062268 DOI: 10.1371/journal.pone.0229769] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 02/14/2020] [Indexed: 02/06/2023] Open
Abstract
Cerebral ischemia/reperfusion (I/R) injury causes cognitive deficits, excitotoxicity, neuroinflammation, oxidative stress and brain edema. Vitamin K2 (Menaquinone 4, MK-4) as a potent antioxidant can be a good candidate to ameliorate I/R consequences. This study focused on the neuroprotective effects of MK-4 for cerebral I/R insult in rat’s hippocampus. The rat model of cerebral I/R was generated by transient bilateral common carotid artery occlusion for 20 min. Rats were divided into control, I/R, I/R+DMSO (solvent (1% v/v)) and I/R+MK-4 treated (400 mg/kg, i.p.) groups. Twenty-four hours after I/R injury induction, total brain water content, superoxide dismutase (SOD) activity, nitrate/nitrite concentration and neuronal density were evaluated. In addition to quantify the apoptosis processes, TUNEL staining, as well as expression level of Bax and Bcl2, were assessed. To evaluate astrogliosis and induced neurotoxicity by I/R GFAP and GLT-1 mRNA expression level were quantified. Furthermore, pro-inflammatory cytokines including IL-1β, IL-6 and TNF-α were measured. Seven days post I/R, behavioral analysis to quantify cognitive function, as well as Nissl staining for surviving neuronal evaluation, were conducted. The findings indicated that administration of MK-4 following I/R injury improved anxiety-like behavior, short term and spatial learning and memory impairment induced by I/R. Also, MK-4 was able to diminish the increased total brain water content, apoptotic cell density, Bax/ Bcl2 ratio and GFAP mRNA expression following I/R. In addition, the high level of nitrate/nitrite, IL-6, IL-1β and TNF-α induced by I/R was reduced after MK-4 administration. However, MK-4 promotes the level of SOD activity and GLT-1 mRNA expression in I/R rat model. The findings demonstrated that MK-4 can rescue transient global cerebral I/R consequences via its anti-inflammatory and anti-oxidative stress features. MK-4 administration ameliorates neuroinflammation, neurotoxicity and neuronal cell death processes and leads to neuroprotection.
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Affiliation(s)
| | - Masoud Fereidoni
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
- * E-mail:
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13
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Cis and trans isomers of the vitamin menaquinone-7: which one is biologically significant? Appl Microbiol Biotechnol 2020; 104:2765-2776. [PMID: 32009201 DOI: 10.1007/s00253-020-10409-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/15/2020] [Accepted: 01/23/2020] [Indexed: 12/20/2022]
Abstract
Recently, several studies have indicated that an adequate intake of menaquinone-7 (MK-7) offers numerous health benefits. However, the low availability of MK-7 in the diet necessitates the development of dietary supplements or functional food products to complement natural food sources and meet the daily intake requirements. Like most biological molecules, MK-7 can exist as geometric isomers that can occur in the cis, trans, and cis/trans forms; however, only the all-trans form is biologically significant. MK-7 is traditionally produced through bacterial fermentation, but various synthetic preparations have lately become available. The isomer composition in the final product is influenced by numerous factors, including the methods of production and purification, as well as particular environmental and storage conditions. The MK-7 profile obtained from the various production methods has not yet been elucidated, and the ideal method for the synthesis of the all-trans form of the vitamin is also debatable. Consequently, the quantification of the MK-7 profile of various products is necessary to develop an understanding of the factors that influence the proportion of isomers that are obtained in different preparations. Several possible methods exist for the quantification of MK-7 isomers, and of these, liquid chromatography in conjunction with mass spectrometry techniques appears to be the most promising. Evaluation of the isomer composition is an important consideration, as only the all-trans form sustains biological activity. Furthermore, knowledge of the prominent factors that influence the MK-7 composition may also enable their manipulation to obtain a more favorable MK-7 profile in the final product.
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14
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Salminen W, Agbaje-Williams M, Ajayi FO. A Unique Formulation of Cardioprotective Bio-Actives: An Overview of Their Safety Profile. MEDICINES (BASEL, SWITZERLAND) 2019; 6:E107. [PMID: 31652632 PMCID: PMC6963456 DOI: 10.3390/medicines6040107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/16/2019] [Accepted: 10/17/2019] [Indexed: 12/19/2022]
Abstract
The burden of cardiovascular disease (CVD) remains high globally and in the United States despite the availability of pharmaceuticals aimed at its prevention and treatment. An invention by Summit Innovation Labs, which is a formula consisting of a unique blend of select polyphenols (i.e., curcumin, quercetin, resveratrol), vitamin K2 as menaquinone-7, and magnesium, was recently developed to modulate the impact of the specific drivers of CVD, namely, vascular calcification, oxidative stress, and chronic inflammation. The SIL formulation is a dietary supplement that was designed leveraging the more bioavailable forms of ingredients with poor absorption, such as curcumin and quercetin. Each ingredient within the SIL formulation has been shown to contribute to CVD risk reduction by moderating the effect of CVD triggers, thereby providing a holistic prevention strategy for CVD in the healthy population. This review focuses on recently published clinical data to support the safety profile of these ingredients following oral administration. The preponderance of clinical trial data reviewed support the overall safety of the bioactives when used singly or in combination. The most commonly reported adverse effects were generally mild dose-related gastrointestinal disturbances, which may be alleviated with diet in some cases. In light of these, we conclude that the combination of the ingredients in the SIL formulation is reasonably expected to be safe.
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15
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Microbial production of vitamin K2: current status and future prospects. Biotechnol Adv 2019; 39:107453. [PMID: 31629792 DOI: 10.1016/j.biotechadv.2019.107453] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/24/2019] [Accepted: 09/17/2019] [Indexed: 12/18/2022]
Abstract
Vitamin K2, also called menaquinone, is an essential lipid-soluble vitamin that plays a critical role in blood clotting and prevention of osteoporosis. It has become a focus of research in recent years and has been widely used in the food and pharmaceutical industries. This review will briefly introduce the functions and applications of vitamin K2 first, after which the biosynthesis pathways and enzymes will be analyzed in-depth to highlight the bottlenecks facing the microbial vitamin K2 production on the industrial scale. Then, various strategies, including strain mutagenesis and genetic modification, different cultivation modes, fermentation and separation processes, will be summarized and discussed. The future prospects and perspectives of microbial menaquinone production will also be discussed finally.
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Lindholt JS, Frandsen NE, Fredgart MH, Øvrehus KA, Dahl JS, Møller JE, Folkestad L, Urbonaviciene G, Becker SW, Lambrechtsen J, Auscher S, Hosbond S, Alan DH, Rasmussen LM, Gerke O, Mickley H, Diederichsen A. Effects of menaquinone-7 supplementation in patients with aortic valve calcification: study protocol for a randomised controlled trial. BMJ Open 2018; 8:e022019. [PMID: 30139903 PMCID: PMC6112404 DOI: 10.1136/bmjopen-2018-022019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
INTRODUCTION Aortic stenosis is a common heart valve disease, and due to the growing elderly population, the prevalence is increasing. The disease is progressive with increasing calcification of the valve cusps. A few attempts with medical preventive treatment have failed; thus, presently, the only effective treatment of aortic stenosis is surgery. This study will examine the effect of menaquinone-7 (MK-7) supplementation on progression of aortic valve calcification (AVC). We hypothesise that MK-7 supplementation will slow down the calcification process. METHODS AND ANALYSIS In this multicenter and double-blinded, placebo-controlled study, 400 men aged 65-74 years with substantial AVC are randomised (1:1) to treatment with MK-7 (720 µg/day) supplemented by the recommended daily dose of vitamin D (25 µg/day) or placebo treatment (no active treatment) for 2 years. Exclusion criteria are treatment with vitamin K antagonist or coagulation disorders. To evaluate AVC score, a non-contrast CT scan is performed at baseline and repeated after 12 and 24 months of follow-up. Primary outcome is difference in AVC score from baseline to follow-up at 2 years. Intention-to-treat principle is used for all analyses. ETHICS AND DISSEMINATION There are no reported adverse effects associated with the use of MK-7. The protocol is approved by the Regional Scientific Ethical Committee for Southern Denmark (S-20170059) and the Data Protection Agency (17/19010). It is conducted in accordance with the Declaration of Helsinki. Positive as well as negative findings will be reported. TRIAL REGISTRATION NUMBER NCT03243890.
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Affiliation(s)
- Jes Sanddal Lindholt
- Department of Cardiothoracic and Vascular Surgery, Odense Universitetshospital, Odense, Denmark
- Centre for Individualized Medicine in Arterial Diseases, Odense Universitetshospital, Odense, Denmark
| | | | | | | | | | | | - Lars Folkestad
- Department of Endocrinology, Odense Universitetshospital, Odense, Denmark
| | | | | | - Jess Lambrechtsen
- Department of Cardiology, Svendborg Sygehus, Svendborg, Syddanmark, Denmark
| | - Søren Auscher
- Department of Cardiology, Svendborg Sygehus, Svendborg, Syddanmark, Denmark
| | | | | | - Lars Melholt Rasmussen
- Centre for Individualized Medicine in Arterial Diseases, Odense Universitetshospital, Odense, Denmark
- Department of Clinical Biochemistry and Pharmacology, Odense Universitetshospital, Odense, Denmark
| | - Oke Gerke
- Department of Nuclear Medicine, Odense Universitetshospital, Odense C, Denmark
| | - Hans Mickley
- Department of Cardiology, Odense Universitetshospital, Odense, Denmark
| | - Axel Diederichsen
- Centre for Individualized Medicine in Arterial Diseases, Odense Universitetshospital, Odense, Denmark
- Department of Cardiology, Odense Universitetshospital, Odense, Denmark
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17
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Szterk A, Bus K, Zmysłowski A, Ofiara K. Analysis of Menaquinone-7 Content and Impurities in Oil and Non-Oil Dietary Supplements. Molecules 2018; 23:molecules23051056. [PMID: 29724016 PMCID: PMC6102598 DOI: 10.3390/molecules23051056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 04/24/2018] [Accepted: 04/28/2018] [Indexed: 12/12/2022] Open
Abstract
Rapid, global technological development has caused the food industry to use concentrated food component sources like dietary supplements ever more commonly as part of the human diet. This study analysed the menaquinone-7 (MK-7) content of dietary supplements in oil capsule and hard tablet forms. A novel method for separating and measuring geometric isomers of MK-7 in dietary supplements was developed and validated. Eleven different isomers of cis/trans- menaquinone-7 were identified. Identification of cis/trans isomers was performed by combination of HPLC, UPLC and HRMS-QTOF detection, whereas their quantities were determined by DAD detection. The content of menaquinone impurities was ascertained, including cis/trans- menaquinone-6 isomers (5.5–16.9 µg per tablet/capsule) and cis/trans-menaquinone-7 isomers (70.9–218.7 µg tablet/capsule), which were most likely formed during the chemical synthesis of the menaquinone-7. The all-trans MK-7 content was lower than the isomeric form and often lower than what the labels declared. A new method of quantification, developed and validated for menaquinones in oil capsules, provided on average 90% recovery and a limit of quantification (LOQ) of approximately 1 µg mL−1.
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Affiliation(s)
- Arkadiusz Szterk
- Department of Spectrometric Methods, National Medicines Institute, 30/34 Chełmska, 00-725 Warsaw, Poland.
| | - Katarzyna Bus
- Department of Spectrometric Methods, National Medicines Institute, 30/34 Chełmska, 00-725 Warsaw, Poland.
| | - Adam Zmysłowski
- Department of Spectrometric Methods, National Medicines Institute, 30/34 Chełmska, 00-725 Warsaw, Poland.
| | - Karol Ofiara
- Department of Spectrometric Methods, National Medicines Institute, 30/34 Chełmska, 00-725 Warsaw, Poland.
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18
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Wen L, Chen J, Duan L, Li S. Vitamin K‑dependent proteins involved in bone and cardiovascular health (Review). Mol Med Rep 2018; 18:3-15. [PMID: 29749440 PMCID: PMC6059683 DOI: 10.3892/mmr.2018.8940] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 02/13/2018] [Indexed: 12/19/2022] Open
Abstract
In postmenopausal women and elderly men, bone density decreases with age and vascular calcification is aggravated. This condition is closely associated with vitamin K2 deficiency. A total of 17 different vitamin K-dependent proteins have been identified to date. Vitamin K-dependent proteins are located within the bone, heart and blood vessels. For instance, carboxylated osteocalcin is beneficial for bone and aids the deposition of calcium into the bone matrix. Carboxylated matrix Gla protein effectively protects blood vessels and may prevent calcification within the vascular wall. Furthermore, carboxylated Gla-rich protein has been reported to act as an inhibitor in the calcification of the cardiovascular system, while growth arrest-specific protein-6 protects endothelial cells and vascular smooth muscle cells, resists apoptosis and inhibits the calcification of blood vessels by inhibiting the apoptosis of vascular smooth muscle cells. In addition, periostin may promote the differentiation, aggregation, adhesion and proliferation of osteoblasts. Periostin also occurs in the heart and may be associated with the reconstruction of heart function. These vitamin K-dependent proteins may exert their functions following γ-carboxylation with vitamin K, and different vitamin K-dependent proteins may exhibit synergistic effects or antagonistic effects on each other. In the cardiovascular system with vitamin K antagonist supplement or vitamin K deficiency, calcification occurs in the endothelium of blood vessels and vascular smooth muscle cells are transformed into osteoblast-like cells, a phenomenon that resembles bone growth. Both the bone and cardiovascular system are closely associated during embryonic development. Thus, the present study hypothesized that embryonic developmental position and tissue calcification may have a certain association for the bone and the cardiovascular system. This review describes and briefly discusses several important vitamin K-dependent proteins that serve an important role in bone and the cardiovascular system. The results of the review suggest that the vascular calcification and osteogenic differentiation of vascular smooth muscle cells may be associated with the location of the bone and cardiovascular system during embryonic development.
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Affiliation(s)
- Lianpu Wen
- Department of Physiology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Jiepeng Chen
- Sungen Bioscience Co., Ltd., Shantou, Guangdong 515000, P.R. China
| | - Lili Duan
- Sungen Bioscience Co., Ltd., Shantou, Guangdong 515000, P.R. China
| | - Shuzhuang Li
- Department of Physiology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
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19
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Identification of cis / trans isomers of menaquinone-7 in food as exemplified by dietary supplements. Food Chem 2018; 243:403-409. [DOI: 10.1016/j.foodchem.2017.10.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/11/2017] [Accepted: 10/02/2017] [Indexed: 01/07/2023]
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20
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Marles RJ, Roe AL, Oketch-Rabah HA. US Pharmacopeial Convention safety evaluation of menaquinone-7, a form of vitamin K. Nutr Rev 2018; 75:553-578. [PMID: 28838081 DOI: 10.1093/nutrit/nux022] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Vitamin K plays important biological roles in maintaining normal blood coagulation, bone mineralization, soft tissue physiology, and neurological development. Menaquinone-7 is a form of vitamin K2 that occurs naturally in some animal-derived and fermented foods. It is also available as an ingredient of dietary supplements. Menaquinone-7 has greater bioavailability than other forms of vitamin K, which has led to increasing sales and use of menaquinone-7 supplements. This special article reviews the chemistry, nomenclature, dietary sources, intake levels, and pharmacokinetics of menaquinones, along with the nonclinical toxicity data available and the data on clinical outcomes related to safety (adverse events). In conclusion, the data reviewed indicate that menaquinone-7, when ingested as a dietary supplement, is not associated with any serious risk to health or with other public health concerns. On the basis of this conclusion, US Pharmacopeia monographs have been developed to establish quality standards for menaquinone-7 as a dietary ingredient and as a dietary supplement in various dosage forms.
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Affiliation(s)
- Robin J Marles
- US Pharmacopeial Convention's Dietary Supplements Admission Evaluations Joint Standard Setting Subcommittee, US Pharmacopeial Convention, Rockville, Maryland, USA. US Pharmacopeial Convention, Rockville, Maryland, USA
| | - Amy L Roe
- US Pharmacopeial Convention's Dietary Supplements Admission Evaluations Joint Standard Setting Subcommittee, US Pharmacopeial Convention, Rockville, Maryland, USA. US Pharmacopeial Convention, Rockville, Maryland, USA
| | - Hellen A Oketch-Rabah
- US Pharmacopeial Convention's Dietary Supplements Admission Evaluations Joint Standard Setting Subcommittee, US Pharmacopeial Convention, Rockville, Maryland, USA. US Pharmacopeial Convention, Rockville, Maryland, USA
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21
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Llana-Ruiz-Cabello M, Maisanaba S, Puerto M, Pichardo S, Jos A, Moyano R, Cameán A. A subchronic 90-day oral toxicity study of Origanum vulgare essential oil in rats. Food Chem Toxicol 2017; 101:36-47. [DOI: 10.1016/j.fct.2017.01.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 12/23/2016] [Accepted: 01/03/2017] [Indexed: 01/28/2023]
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22
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Jedynak Ł, Jedynak M, Kossykowska M, Zagrodzka J. A novel method for the determination of chemical purity and assay of menaquinone-7. Comparison with the methods from the official USP monograph. J Pharm Biomed Anal 2016; 135:116-125. [PMID: 28024259 DOI: 10.1016/j.jpba.2016.11.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/25/2016] [Accepted: 11/28/2016] [Indexed: 01/07/2023]
Abstract
An HPLC method with UV detection and separation with the use of a C30 reversed phase analytical column for the determination of chemical purity and assay of menaquinone-7 (MK7) in one chromatographic run was developed. The method is superior to the methods published in the USP Monograph in terms of selectivity, sensitivity and accuracy, as well as time, solvent and sample consumption. The developed methodology was applied to MK7 samples of active pharmaceutical ingredient (API) purity, MK7 samples of lower quality and crude MK7 samples before purification. The comparison of the results revealed that the use of USP methodology could lead to serious overestimation (up to a few percent) of both purity and MK7 assay in menaquinone-7 samples.
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Affiliation(s)
- Łukasz Jedynak
- Pharmaceutical Research Institute, R&D Analytical Chemistry Department, Rydygiera 8, 01-793 Warsaw, Poland.
| | - Maria Jedynak
- Pharmaceutical Research Institute, R&D Analytical Chemistry Department, Rydygiera 8, 01-793 Warsaw, Poland
| | - Magdalena Kossykowska
- Pharmaceutical Research Institute, R&D Analytical Chemistry Department, Rydygiera 8, 01-793 Warsaw, Poland
| | - Joanna Zagrodzka
- Pharmaceutical Research Institute, R&D Analytical Chemistry Department, Rydygiera 8, 01-793 Warsaw, Poland
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23
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Hami J, Hosseini M, Nezhad SV, Shahi S, Lotfi N, Ehsani H, Sadeghi A. Beneficial effects of L-arginine on 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced neuronal degeneration in substantia nigra of Balb/c mice. Adv Biomed Res 2016; 5:140. [PMID: 27656609 PMCID: PMC5025923 DOI: 10.4103/2277-9175.187374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 09/09/2015] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND L-arginine has been recently investigated and proposed to reduce neurological damage after various experimental models of neuronal cellular damage. In this study, we aim to evaluate the beneficial effects of L-arginine administration on the numerical density of dark neurons (DNs) in the substantia nigra pars compacta (SNc) of Balb/c mice subjected to 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) administration. MATERIALS AND METHODS Male Balb/c mice were randomly divided into 4 groups (n = 7 each): MPTP only; saline only (control); MPTP + L-arginine; and L-arginine only. The animals were infused intranasally with a single intranasal administration of the proneurotoxin MPTP (1 mg/nostril). L-arginine (300 mg/kg) was administrated intraperitoneally once daily for 1-week starting from 3 days after MPTP administration. Cavalieri principle method was used to estimate the numerical density of DNs in the SNc of different studied groups. RESULTS Twenty days following MPTP administration, the number of DNs was significantly increased when compared to sham-control and L-arginine-control groups (P < 0.05). Nevertheless, our results showed that L-arginine administration significantly decreased the numerical density of DNs in SNc of mice. CONCLUSION This investigation provides new insights in experimental models of Parkinson's disease, indicating that L-arginine represents a potential treatment agent for dopaminergic neuron degeneration in SNc observed in Parkinson's disease patients.
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Affiliation(s)
- Javad Hami
- Department of Anatomical Sciences, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Mehran Hosseini
- Department of Public Health, Research Centre of Experimental Medicine, Deputy of Research and Technology, Birjand University of Medical Sciences, Birjand, Iran
| | - Saeed Vafaei Nezhad
- Department of Anatomical Sciences, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Sekineh Shahi
- Department of Biology, School of Sciences, Payam-e-Noor University, Tehran, Iran
| | - Nassim Lotfi
- Department of Anatomical Sciences, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Hossein Ehsani
- Student of Medicine, Department of Anatomical Sciences, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Akram Sadeghi
- Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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24
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Baell JB. Feeling Nature's PAINS: Natural Products, Natural Product Drugs, and Pan Assay Interference Compounds (PAINS). JOURNAL OF NATURAL PRODUCTS 2016; 79:616-28. [PMID: 26900761 DOI: 10.1021/acs.jnatprod.5b00947] [Citation(s) in RCA: 351] [Impact Index Per Article: 43.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We have previously reported on classes of compounds that can interfere with bioassays via a number of different mechanisms and termed such compounds Pan Assay INterference compoundS, or PAINS. These compounds were defined on the basis of high-throughput data derived from vendor-supplied synthetics. The question therefore arises whether the concept of PAINS is relevant to compounds of natural origin. Here, it is shown that this is indeed the case, but that the context of the biological readout is an important factor that must be brought into consideration.
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Affiliation(s)
- Jonathan B Baell
- Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus) , 381 Royal Parade, Parkville, Victoria 3084, Australia
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25
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Caluwé R, Pyfferoen L, De Boeck K, De Vriese AS. The effects of vitamin K supplementation and vitamin K antagonists on progression of vascular calcification: ongoing randomized controlled trials. Clin Kidney J 2015; 9:273-9. [PMID: 26985380 PMCID: PMC4792621 DOI: 10.1093/ckj/sfv146] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 11/30/2015] [Indexed: 01/02/2023] Open
Abstract
Background The extent and the progression of vascular calcification (VC) are independent predictors of cardiovascular risk in the haemodialysis population. Vitamin K is essential for the activation of matrix gla protein (MGP), a powerful inhibitor of tissue calcification. Functional vitamin K deficiency may contribute to the high VC burden in haemodialysis patients. In addition, haemodialysis patients are frequently treated with vitamin K antagonists, mainly to prevent stroke in atrial fibrillation, potentially compounding the cardiovascular risk in these already vulnerable patients. New oral anticoagulants (NOACs) are valuable alternatives to vitamin K antagonists in the general population, but their use in dialysis has been encumbered by substantial renal clearance. However, a recent pharmacokinetic study provided information on how to use rivaroxaban in haemodialysis patients. Methods We conduct a randomized, prospective, multicentre, open-label interventional clinical trial that will include 117 chronic haemodialysis patients with non-valvular atrial fibrillation, treated with or candidates for treatment with vitamin K antagonists. Patients will be randomized to a vitamin K antagonist titrated weekly to an international normalized ratio between 2 and 3, a daily dose of rivaroxaban of 10 mg, or a daily dose of rivaroxaban 10 mg with a thrice weekly supplement of 2000 µg vitamin K2. Cardiac computed tomography, pulse wave velocity (PWV) measurements and MGP sampling will be performed at baseline, 6 months, 12 months and 18 months. Primary endpoints include progression of coronary artery and thoracic aorta calcification and changes in PWV. Secondary endpoints are progression of aortic and mitral valve calcification, all-cause mortality, major adverse cardiovascular events, stroke and bleeding. The ClinicalTrials.gov database was searched to retrieve related trials. Results Seven trials, three of which are performed in the haemodialysis population, evaluate whether pharmacological doses of vitamin K1 or K2 retard progression of VC. Five studies compare the effect of warfarin and NOACs on progression of VC, the present study being the only conducted in the dialysis population. Conclusion Vitamin K deficiency may be a modifiable cardiovascular risk factor in the haemodialysis population. Conversely, vitamin K antagonists may aggravate VC burden in haemodialysis patients. Several ongoing trials may provide an answer to these questions in the near future.
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Affiliation(s)
| | - Lotte Pyfferoen
- Department of Medical Imaging , AZ Sint-Jan Brugge , Brugge , Belgium
| | - Koen De Boeck
- Division of Nephrology , ZNA Hospital , Antwerp , Belgium
| | - An S De Vriese
- Division of Nephrology and Infectious Diseases , AZ Sint-Jan Brugge , Brugge , Belgium
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Scheiber D, Veulemans V, Horn P, Chatrou ML, Potthoff SA, Kelm M, Schurgers LJ, Westenfeld R. High-Dose Menaquinone-7 Supplementation Reduces Cardiovascular Calcification in a Murine Model of Extraosseous Calcification. Nutrients 2015; 7:6991-7011. [PMID: 26295257 PMCID: PMC4555157 DOI: 10.3390/nu7085318] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 07/30/2015] [Accepted: 08/06/2015] [Indexed: 12/12/2022] Open
Abstract
Cardiovascular calcification is prevalent in the aging population and in patients with chronic kidney disease (CKD) and diabetes mellitus, giving rise to substantial morbidity and mortality. Vitamin K-dependent matrix Gla-protein (MGP) is an important inhibitor of calcification. The aim of this study was to evaluate the impact of high-dose menaquinone-7 (MK-7) supplementation (100 µg/g diet) on the development of extraosseous calcification in a murine model. Calcification was induced by 5/6 nephrectomy combined with high phosphate diet in rats. Sham operated animals served as controls. Animals received high or low MK-7 diets for 12 weeks. We assessed vital parameters, serum chemistry, creatinine clearance, and cardiac function. CKD provoked increased aortic (1.3 fold; p < 0.05) and myocardial (2.4 fold; p < 0.05) calcification in line with increased alkaline phosphatase levels (2.2 fold; p < 0.01). MK-7 supplementation inhibited cardiovascular calcification and decreased aortic alkaline phosphatase tissue concentrations. Furthermore, MK-7 supplementation increased aortic MGP messenger ribonucleic acid (mRNA) expression (10-fold; p < 0.05). CKD-induced arterial hypertension with secondary myocardial hypertrophy and increased elastic fiber breaking points in the arterial tunica media did not change with MK-7 supplementation. Our results show that high-dose MK-7 supplementation inhibits the development of cardiovascular calcification. The protective effect of MK-7 may be related to the inhibition of secondary mineralization of damaged vascular structures.
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Affiliation(s)
- Daniel Scheiber
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty, University Duesseldorf, Duesseldorf 40225, Germany.
| | - Verena Veulemans
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty, University Duesseldorf, Duesseldorf 40225, Germany.
| | - Patrick Horn
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty, University Duesseldorf, Duesseldorf 40225, Germany.
| | - Martijn L Chatrou
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht 6229 ER, The Netherlands.
| | - Sebastian A Potthoff
- Department of Nephrology, University Duesseldorf, Medical Faculty, Duesseldorf 40225, Germany.
| | - Malte Kelm
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty, University Duesseldorf, Duesseldorf 40225, Germany.
- Cardiovascular Research Institute Duesseldorf, University Duesseldorf, Medical Faculty, Duesseldorf 40225, Germany.
| | - Leon J Schurgers
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht 6229 ER, The Netherlands.
| | - Ralf Westenfeld
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty, University Duesseldorf, Duesseldorf 40225, Germany.
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Abdel-Rahman MS, Alkady EA, Ahmed S. Menaquinone-7 as a novel pharmacological therapy in the treatment of rheumatoid arthritis: A clinical study. Eur J Pharmacol 2015; 761:273-8. [DOI: 10.1016/j.ejphar.2015.06.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 06/04/2015] [Accepted: 06/05/2015] [Indexed: 11/28/2022]
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Festing MFW. The extended statistical analysis of toxicity tests using standardised effect sizes (SESs): a comparison of nine published papers. PLoS One 2014; 9:e112955. [PMID: 25426843 PMCID: PMC4245118 DOI: 10.1371/journal.pone.0112955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 08/07/2014] [Indexed: 11/18/2022] Open
Abstract
The safety of chemicals, drugs, novel foods and genetically modified crops is often tested using repeat-dose sub-acute toxicity tests in rats or mice. It is important to avoid misinterpretations of the results as these tests are used to help determine safe exposure levels in humans. Treated and control groups are compared for a range of haematological, biochemical and other biomarkers which may indicate tissue damage or other adverse effects. However, the statistical analysis and presentation of such data poses problems due to the large number of statistical tests which are involved. Often, it is not clear whether a "statistically significant" effect is real or a false positive (type I error) due to sampling variation. The author's conclusions appear to be reached somewhat subjectively by the pattern of statistical significances, discounting those which they judge to be type I errors and ignoring any biomarker where the p-value is greater than p = 0.05. However, by using standardised effect sizes (SESs) a range of graphical methods and an over-all assessment of the mean absolute response can be made. The approach is an extension, not a replacement of existing methods. It is intended to assist toxicologists and regulators in the interpretation of the results. Here, the SES analysis has been applied to data from nine published sub-acute toxicity tests in order to compare the findings with those of the author's. Line plots, box plots and bar plots show the pattern of response. Dose-response relationships are easily seen. A "bootstrap" test compares the mean absolute differences across dose groups. In four out of seven papers where the no observed adverse effect level (NOAEL) was estimated by the authors, it was set too high according to the bootstrap test, suggesting that possible toxicity is under-estimated.
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Affiliation(s)
- Michael F. W. Festing
- Medical Research Council Toxicology Unit, Hodgkin Building, Lancaster Road, Leicester, United Kingdom
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Scientific Opinion on the safety and efficacy of vitamin K3 (menadione sodium bisulphite and menadione nicotinamide bisulphite) as a feed additive for all animal species. EFSA J 2014. [DOI: 10.2903/j.efsa.2014.3532] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Abstract
Recent reports have attributed the potential health benefits of vitamin K beyond its function to activate hepatic coagulation factors. Moreover, several studies have suggested that menaquinones, also known as vitamin K2, may be more effective in activating extra-hepatic vitamin K-dependent proteins than phylloquinone, also known as vitamin K1. Nevertheless, present dietary reference values (DRV) for vitamin K are exclusively based on phylloquinone, and its function in coagulation. The present review describes the current knowledge on menaquinones based on the following criteria for setting DRV: optimal dietary intake; nutrient amount required to prevent deficiency, maintain optimal body stores and/or prevent chronic disease; factors influencing requirements such as absorption, metabolism, age and sex. Dietary intake of menaquinones accounts for up to 25% of total vitamin K intake and contributes to the biological functions of vitamin K. However, menaquinones are different from phylloquinone with respect to their chemical structure and pharmacokinetics, which affects bioavailability, metabolism and perhaps impact on health outcomes. There are significant gaps in the current knowledge on menaquinones based on the criteria for setting DRV. Therefore, we conclude that further investigations are needed to establish how differences among the vitamin K forms may influence tissue specificities and their role in human health. However, there is merit for considering both menaquinones and phylloquinone when developing future recommendations for vitamin K intake.
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