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https://www.readbyqxmd.com/read/29314139/validating-genome-wide-associated-signals-for-clinical-mastitis-in-german-holstein-cattle
#1
H Abdel-Shafy, R H Bortfeldt, M Reissmann, G A Brockmann
A validation study for six genomic regions previously identified by a genome-wide association study for somatic cell score was conducted with data of clinical mastitis in German Holstein cattle. Out of 10 tested SNPs, five on chromosomes 6, 13 and 19 were significantly associated with clinical mastitis (P < 0.05). Three SNPs on chromosomes 6 and 19 had the same direction of effect as those previously reported in the initial genome-wide association study for somatic cell score. The other two SNPs on chromosome 13 had opposite effects...
January 4, 2018: Animal Genetics
https://www.readbyqxmd.com/read/29280077/effects-of-combined-human-parathyroid-hormone-1-34-and-menaquinone-4-treatment-on-the-interface-of-hydroxyapatite-coated-titanium-implants-in-the-femur-of-osteoporotic-rats
#2
Hang Li, Qiang Zhou, Bing-Li Bai, She-Ji Weng, Zong-Yi Wu, Zhong-Jie Xie, Zhen-Hua Feng, Liang Cheng, Viraj Boodhun, Lei Yang
The objective of this study was to investigate the effects of human parathyroid hormone (1-34) (PTH1-34; PTH) plus menaquinone-4 (vitamin K2; MK) on the osseous integration of hydroxyapatite (HA)-coated implants in osteoporotic rats. Ovariectomized female Sprague-Dawley rats were used for the study. Twelve weeks after bilateral ovariectomy, HA-coated titanium implants were inserted bilaterally in the femoral medullary canal of the remaining 40 ovariectomized rats. All animals were then randomly assigned to four groups: Control, MK, PTH and PTH + MK...
December 26, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/29214795/retraction-paper-comparison-of-the-effect-of-vitamin-k2-and-risedronate-on-trabecular-bone-in-glucocorticoid-treated-rats-a-bone-histomorphometry-study-by-iwamoto-j-et-al-yonsei-med-j-2009-50-2-189-194
#3
https://www.readbyqxmd.com/read/29213118/vitamin-k2-prevents-lymphoma-in-drosophila
#4
Maytham A Dragh, Zhiliang Xu, Zainab S Al-Allak, Ling Hong
Previous studies have established the anticancer effect of vitamin K2 (VK2). However, its effect on lymphoma induced by UBIAD1/heix mutation in Drosophila remains unknown. Therefore, we aimed to develop an in vivo model of lymphoma for the precise characterization of lymphoma phenotypes. We also aimed to improve the understanding of the mechanisms that underlie the preventative effects of VK2 on lymphoma. Our results demonstrated that VK2 prevents lymphoma by acting as an electron carrier and by correcting the function and structure of mitochondria by inhibiting mitochondrial reactive oxygen species production mtROS...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29196151/effect-of-vitamin-k2-on-type-2-diabetes-mellitus-a-review
#5
REVIEW
Yan Li, Jie Peng Chen, Lili Duan, Shuzhuang Li
Type 2 diabetes mellitus (T2DM) continue to be a major public health problem around the world that frequently presents with microvascular and macrovascular complications. Individuals with T2DM are not only suffering from significant emotional and physical misery, but also at increased risk of dying from severe complications. In recent years, evidence from prospective observational studies and clinical trials has shown T2DM risk reduction with vitamin K2 supplementation. We thus did an overview of currently available studies to assess the effect of vitamin K2 supplementation on insulin sensitivity, glycaemic control and reviewed the underlying mechanisms...
November 28, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29167270/ubia-prenyltransferase-domain-containing-protein-1-modulates-hmg-coa-reductase-degradation-to-coordinate-synthesis-of-sterol-and-nonsterol-isoprenoids
#6
Marc M Schumacher, Dong-Jae Jun, Brittany M Johnson, Russell A DeBose-Boyd
UbiA prenyltransferase domain-containing protein-1 (UBIAD1) utilizes geranylgeranyl pyrophosphate (GGpp) to synthesize vitamin K2. We previously reported that sterols stimulate binding of UBIAD1 to endoplasmic reticulum (ER)-localized HMG CoA reductase. UBIAD1 binding inhibits sterol-accelerated, ER-associated degradation (ERAD) of reductase, one of several mechanisms for feedback control of this rate-limiting enzyme in the branched pathway that produces cholesterol and nonsterol isoprenoids such as GGpp. Accumulation of GGpp in ER membranes triggers release of UBIAD1 from reductase, permitting its maximal ERAD and ER-to-Golgi transport of UBIAD1...
November 22, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29107682/underlying-mechanisms-for-sterol-induced-ubiquitination-and-er-associated-degradation-of-hmg-coa-reductase
#7
REVIEW
Brittany M Johnson, Russell A DeBose-Boyd
Accelerated ubiquitination and subsequent endoplasmic reticulum (ER)-associated degradation (ERAD) constitute one of several mechanisms for feedback control of HMG CoA reductase, the rate-limiting enzyme in synthesis of cholesterol and nonsterol isoprenoids. This ERAD is initiated by the accumulation of certain sterols in ER membranes, which trigger binding of reductase to ER membrane proteins called Insigs. Insig-associated ubiquitin ligases facilitate ubiquitination of reductase, marking the enzyme for extraction across the ER membrane through a reaction that is augmented by nonsterol isoprenoids...
October 28, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28986748/anesthetic-isoflurane-or-desflurane-plus-surgery-differently-affects-cognitive-function-in-alzheimer-s-disease-transgenic-mice
#8
Huihui Miao, Yuanlin Dong, Yiying Zhang, Hui Zheng, Yuan Shen, Gregory Crosby, Deborah J Culley, Edward R Marcantonio, Zhongcong Xie
Anesthesia/surgery could be associated with cognitive impairment and Alzheimer's disease neuropathogenesis. However, whether surgery under different anesthetics has different effects on cognitive function remains largely unknown. We therefore set out to compare effects of anesthetic isoflurane or desflurane plus surgery on cognitive function and hippocampus levels of synaptic marker (postsynaptic density-95 and synaptophysin) and ATP. Five-month-old AD Transgenic (Tg) (FAD5X) and wild-type male mice received isoflurane or desflurane plus abdominal surgery...
October 6, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28973555/the-effects-of-an-environmentally-relevant-level-of-arsenic-on-the-gut-microbiome-and-its-functional-metagenome
#9
Liang Chi, Xiaoming Bian, Bei Gao, Pengcheng Tu, Hongyu Ru, Kun Lu
Multiple environmental factors induce dysbiosis in the gut microbiome and cause a variety of human diseases. Previously, we have first demonstrated that arsenic alters the composition of the gut microbiome. However, the functional impact of arsenic on the gut microbiome has not been adequately assessed, particularly at environmentally relevant concentrations. In this study, we used 16S rRNA sequencing and metagenomics sequencing to investigate how exposure to 100 ppb arsenic for 13 weeks alters the composition and functional capacity of the gut microbiome in mice...
December 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28952607/vitamin-k-induced-effects-on-body-fat-and-weight-results-from-a-3-year-vitamin-k2-intervention-study
#10
M H J Knapen, K M Jardon, C Vermeer
BACKGROUND/OBJECTIVES: Vitamin K status has been linked to fat and glucose metabolism by several authors, but whether high vitamin K intake influences body weight or composition has remained unclear. Here we tested the hypothesis that increased vitamin K intake decreases body fat or fat distribution. SUBJECTS/METHODS: In a randomized placebo-controlled human intervention trial, 214 postmenopausal women, 55-65 years of age, received either 180 mcg/day of vitamin K2 (menaquinone-7, MK-7) or placebo for 3 years...
September 27, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28838081/us-pharmacopeial-convention-safety-evaluation-of-menaquinone-7-a-form-of-vitamin-k
#11
Robin J Marles, Amy L Roe, Hellen A Oketch-Rabah
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)...
July 1, 2017: Nutrition Reviews
https://www.readbyqxmd.com/read/28756183/vitamin-k2-supplementation-and-arterial-stiffness-among-renal-transplant-recipients-a-single-arm-single-center-clinical-trial
#12
Anthony G Mansour, Essa Hariri, Yazan Daaboul, Serge Korjian, Andrew El Alam, Athanase D Protogerou, Hala Kilany, Albert Karam, Antoine Stephan, Sola Aoun Bahous
Subclinical vitamin K deficiency is prevalent among renal transplant recipients and is associated with an increased risk of cardiovascular disease. However, the association between vitamin K supplementation and improvement of arterial stiffness has not been explored in the renal transplant population. The KING trial (vitamin K2 In reNal Graft) is a single-arm study that evaluated the association between the change in vitamin K status and indices of arterial stiffness following 8 weeks of menaquinone-7 (vitamin K2) supplementation (360 μg once daily) among renal transplant recipients (n = 60)...
September 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28698808/vitamins-k1-and-k2-the-emerging-group-of-vitamins-required-for-human-health
#13
REVIEW
Gerry Kurt Schwalfenberg
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...
2017: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/28686548/roles-of-vitamins-d-and-k-nutrition-and-lifestyle-in-low-energy-bone-fractures-in-children-and-young-adults
#14
Michał Karpiński, Janusz Popko, Katarzyna Maresz, Vladimir Badmaev, Sidney J Stohs
The research on skeletal system health in children and young adults, while recognizing the important role of calcium and vitamin D, goes beyond these nutritional standards. This review focuses on the role of vitamin K in combination with vitamin D and other factors in bone health. The current understanding is that maintaining bone health and prevention of low-energy fractures in any pediatric population includes nutritional factors combined with an active lifestyle. Calcium, vitamin D, and vitamin K supplementation contribute independently and collectively to bone health...
July 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28646812/oral-consumption-of-vitamin-k2-for-8-weeks-associated-with-increased-maximal-cardiac-output-during-exercise
#15
RANDOMIZED CONTROLLED TRIAL
Brian K McFarlin, Andrea L Henning, Adam S Venable
Background • Vitamin K1 and K2 are not typically common in a Western diet because they are found in a variety of fermented foods. Vitamin K2 in particular has been demonstrated to restore mitochondrial function and has a key role in production of mitochondrial adenosine triphosphate. Thus, it is reasonable to speculate that dietary supplementation with vitamin K2 could increase the function of muscle with high mitochondrial content (ie, skeletal and cardiac muscle). Objective • The purpose of this study was to determine if 8 wk of dietary supplementation with Vitamin K2 could alter cardiovascular responses to a graded cycle ergometer test...
July 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28624135/effectiveness-of-vitamin-k2-on-osteoporosis-in-adults-with-cerebral-palsy
#16
Yuichi Kodama, Yasuhiro Okamoto, Tomohiro Kubota, Yoshifumi Hiroyama, Hiroshi Fukami, Kensuke Matsushita, Yoshifumi Kawano
BACKGROUND: Osteoporosis can lead to spontaneous fractures in adults with cerebral palsy (CP). Undercarboxylated osteocalcin (ucOC) is a useful marker for vitamin K insufficiency in osteoporosis. The primary objective of this study was to determine the effect of vitamin K2 on bone mineral density (BMD) in adults with CP and vitamin K insufficiency. METHODS: Sixteen adults, median age of 56years, with CP and osteoporosis in whom the serum ucOC concentration exceeded 4...
June 14, 2017: Brain & Development
https://www.readbyqxmd.com/read/28605609/effects-of-macro-and-micronutrients-on-exercise-induced-hepcidin-response-in-highly-trained-endurance-athletes
#17
Dylan T Dahlquist, Trent Stellingwerff, Brad P Dieter, Donald C McKenzie, Michael S Koehle
Iron deficiency has ergolytic effects on athletic performance. Exercise-induced inflammation impedes iron absorption in the digestive tract by upregulating the expression of the iron regulatory protein, hepcidin. Limited research indicates the potential of specific macro- and micronutrients on blunting exercise-induced hepcidin. Therefore, we investigated the effects of postexercise supplementation with protein and carbohydrate (CHO) and vitamins D3 and K2 on the postexercise hepcidin response. Ten highly trained male cyclists (age: 26...
October 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28596081/vitamin-k2-improves-developmental-competency-and-cryo-tolerance-of-in%C3%A2-vitro-derived-ovine-blastocyst
#18
Fatemeh Sefid, S Ostadhosseini, S M Hosseini, F Ghazvini Zadegan, M Pezhman, Mohammad Hossein Nasr Esfahani
Vitamin K2 (VK2), acts as an electron carrier in mitochondria and thereby effects reactive oxygen species (ROS) and ATP production. This study evaluates role of VK2 on in vitro developmental competency and cryo-survival of pre-implantation ovine embryos. Initially the optimal and beneficial concentration of VK2 on compaction and blastocyst formation rates was defined (0.1 μM). Subsequently, it was shown that 0.1 μM VK2, at blastocyst stage, reduces H2O2 production, increase the expression of mitochondrial related gene and improved embryos quality...
June 6, 2017: Cryobiology
https://www.readbyqxmd.com/read/28592319/high-dephosphorylated-uncarboxylated-mgp-in-hemodialysis-patients-risk-factors-and-response-to-vitamin-k2-a-pre-post-intervention-clinical-trial
#19
Mabel Aoun, Maha Makki, Hiba Azar, Hiam Matta, Dania Nehme Chelala
BACKGROUND: Vascular calcifications are highly prevalent in hemodialysis patients. Dephosphorylated-uncarboxylated MGP (dp-ucMGP) was found to increase in vitamin K-deficient patients and may be associated with vascular calcifications. Supplementation of hemodialysis patients with vitamin K2 (menaquinone-7) has been studied in Europe with a maximum 61% drop of dp-ucMGP levels. The aim of this study is to assess first the drop of dp-ucMGP in an Eastern Mediterranean cohort after vitamin K2 treatment and second the correlation between baseline dp-ucMGP and vascular calcification score...
June 7, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28587577/vitamin-k2-can-suppress-the-expression-of-toll-like-receptor-2-tlr2-and-tlr4-and-inhibit-calcification-of-aortic-intima-in-apoe-mice-as-well-as-smooth-muscle-cells
#20
Zhaojun Wang, Zhongqun Wang, Jie Zhu, Xinguang Long, Jinchuan Yan
Background and objectives Vascular calcification is a common complication in atherosclerosis. Accumulating evidence showed that Toll-like receptors (TLRs) mediate pro-inflammatory and atherosclerosis. Recent studies demonstrated that vascular calcification is one of the detrimental effects of vitamin K (Vit K) antagonists. However, the effects of Vit K on the expression of TLR2 and 4 and intimal calcification in artery remained unidentified. Methods and results Eighteen ApoE(-/-) mice were randomly divided into model group, Vit K-treated group, and control group...
January 1, 2017: Vascular
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