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vitamin k and calcification

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https://www.readbyqxmd.com/read/29147170/clinical-assessment-of-warfarin-therapy-in-patients-with-maintenance-dialysis-clinical-efficacy-risks-and-development-of-calciphylaxis
#1
Hajime Hasegawa
Recent years, multiple studies regarding clinical efficacy and risks of Warfarin therapy in dialysis patients have been reported, and not a few reports conclude that clinical advantage of Warfarin is questionable in dialysis patients. Conversely, its hemorrhagic risk might be a little more serious in dialysis patients comparing to non-dialysis patients. Basically, it is assumed that long-term administration of Warfarin accelerates the development of vascular athelosclerosis because of the abolished anti-calcification effect of Gla-protein activation by decreased vitamin K activity...
September 25, 2017: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/29136138/calcific-aortic-valve-stenosis-hard-disease-in-the-heart-a-biomolecular-approach-towards-diagnosis-and-treatment
#2
Frederique E C M Peeters, Steven J R Meex, Marc R Dweck, Elena Aikawa, Harry J G M Crijns, Leon J Schurgers, Bas L J H Kietselaer
Calcific aortic valve stenosis (CAVS) is common in the ageing population and set to become an increasing economic and health burden. Once present, it inevitably progresses and has a poor prognosis in symptomatic patients. No medical therapies are proven to be effective in holding or reducing disease progression. Therefore, aortic valve replacement remains the only available treatment option. Improved knowledge of the mechanisms underlying disease progression has provided us with insights that CAVS is not a passive disease...
November 10, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29121522/effects-of-vitamin-k-antagonist-on-aortic-valve-degeneration-in-non-valvular-atrial-fibrillation-patients-prospective-4-year-observational-study
#3
Kazuhiro Yamamoto, Yukihiro Koretsune, Takashi Akasaka, Akira Kisanuki, Nobuyuki Ohte, Takashi Takenaka, Masaaki Takeuchi, Kiyoshi Yoshida, Kazunori Iwade, Yuji Okuyama, Yutaka Hirano, Yasuharu Takeda, Yasumasa Tsukamoto, Yoshiharu Kinugasa, Satoshi Nakatani, Takashi Sakamoto, Katsuomi Iwakura, Takashi Sozu, Tohru Masuyama
BACKGROUND: The prevalence of atrial fibrillation (AF) is high in elder subjects. Our previous observational study suggested that vitamin K antagonist (VKA) promotes aortic valve degeneration, a principal cause of aortic stenosis in the elderly, and that angiotensin receptor blocker (ARB) attenuates its progression. This study aimed to prospectively investigate these observations in non-valvular AF patients. METHODS: Of enrolled 430 patients with calcification on no or one aortic valve leaflet, all of the planned 4-year follow-up data were obtained in 122 non-valvular AF patients treated with warfarin (warfarin group) and 101 patients with cardiovascular diseases and without AF and prescription of warfarin (non-warfarin group)...
November 6, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29055397/vitamin-k-deficit-and-elastolysis-theory-in-pulmonary-elasto-degenerative-diseases
#4
Rob Janssen, Cees Vermeer
Elastin is a unique protein providing deformability and resilience to dynamic tissues, such as arteries and lungs. It is an absolute basic requirement for circulation and respiration. Elastin can be degraded by elastases and has a high calcium affinity. Elastin calcification and elastin degradation are two pathological processes that impair elastin's functioning. Furthermore, elastin degradation can be associated to elastin calcification. Matrix Gla Protein (MGP) is probably the most potent natural inhibitor of elastin calcification and requires vitamin K for its activation...
October 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28992263/desphospho-uncarboxylated-matrix-gla-protein-is-a-novel-circulating-biomarker-predicting-deterioration-of-renal-function-in-the-general-population
#5
Fang-Fei Wei, Sander Trenson, Lutgarde Thijs, Qi-Fang Huang, Zhen-Yu Zhang, Wen-Yi Yang, Paula Moliterno, Karel Allegaert, José Boggia, Stefan Janssens, Peter Verhamme, Cees Vermeer, Jan A Staessen
Background: Recent studies showing an inverse association between estimated glomerular filtration rate (eGFR), a microvascular trait, and inactive desphospho-uncarboxylated matrix Gla protein (dp-ucMGP) support the hypothesis that after vitamin K-dependent activation, matrix Gla protein (MGP) is renoprotective, but these were limited by their cross-sectional design. Methods: In 1009 randomly recruited Flemish (50.6% women), we assessed the association between eGFR and plasma dp-ucMGP, using multivariable-adjusted analyses...
August 25, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28944098/the-role-of-vitamin-k-status-in-cardiovascular-health-evidence-from-observational-and-clinical-studies
#6
REVIEW
A J van Ballegooijen, J W Beulens
PURPOSE OF REVIEW: Vitamin K is a fat-soluble vitamin required for the activation of several vitamin K-dependent proteins to confer functioning. A growing body of evidence supports that vitamin K has beneficial effects on bone and cardiovascular health. This review summarizes key evidence on vitamin K status as measured by circulating measures and cardiovascular outcomes. RECENT FINDINGS: Overall, observational studies indicate that low vitamin K status as measured by high dephosphorylated uncarboxylated matrix gla protein concentrations plays a potential role in cardiovascular disease development, particularly in high-risk and chronic kidney disease populations...
2017: Current Nutrition Reports
https://www.readbyqxmd.com/read/28933309/cigarette-smoking-is-associated-with-decreased-bone-gla-protein-bgp-levels-in-hemodialysis-patients
#7
Maria Fusaro, Maurizio Gallieni, Andrea Aghi, Giorgio Iervasi, Maria Antonietta Rizzo, Andrea Stucchi, Marianna Noale, Giovanni Tripepi, Thomas Nickolas, Nicola Veronese, Fabrizio Fabris, Sandro Giannini, Lorenzo Calò, Antonio Piccoli, Maria Cristina Mereu, Laura Cosmai, Alberto Ferraro, Fiorenza Magonara, Michela Spinello, Stefania Sella, Mario Plebani
BACKGROUND: Bone gamma-carboxyglutamic acid (Gla)-protein (BGP or osteocalcin) is a vitamin K-dependent protein involved in the regulation of bone mineralization. Smoking is a risk factor for osteoporosis. METHODS: We carried out a secondary analysis of the vitamin K Italian (VIKI) study to investigate the association between cigarette smoking and BGP levels in patients with end stage renal disease. Data were collected in 370 haemodialysis patients, 37% (136) smokers (or ex-smokers) and 63% (234) non-smokers...
September 19, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28926471/role-of-fat-soluble-vitamins-in-osteoarthritis-management
#8
Xiao-Yan Zheng, Jun Liang, Yu-Sheng Li, Min Tu
Osteoarthritis (OA) is a chronic degenerative joint disease, in which metabolic imbalance in bone is observed. The pathological mechanism of metabolic imbalance is not clear yet, but the nutritional factors, particularly the vitamins, might be intrinsic to the development and progression of OA. In this review article, we have explored databases such as PubMed, Scopus, and Google Scholar articles until the beginning of 2017 and reviewed the role of fat-soluble vitamins in pathological and therapeutic aspects of OA...
September 19, 2017: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/28857066/hypoparathyroidism
#9
REVIEW
Michael Mannstadt, John P Bilezikian, Rajesh V Thakker, Fadil M Hannan, Bart L Clarke, Lars Rejnmark, Deborah M Mitchell, Tamara J Vokes, Karen K Winer, Dolores M Shoback
Hypoparathyroidism is a disease characterized by inadequately low circulating concentrations of parathyroid hormone (PTH) resulting in low calcium levels and increased phosphate levels in the blood. Symptoms of the disease result from increased neuromuscular irritability caused by hypocalcaemia and include tingling, muscle cramps and seizures. The most common cause of the disease is inadvertent removal of, or injury to, the parathyroid glands during neck surgery, followed by genetic, idiopathic and autoimmune aetiologies...
August 31, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28855172/genome-wide-association-and-functional-studies-identify-a-role-for-matrix-gla-protein-in-osteoarthritis-of-the-hand
#10
Wouter den Hollander, Cindy G Boer, Deborah J Hart, Michelle S Yau, Yolande F M Ramos, Sarah Metrustry, Linda Broer, Joris Deelen, L Adrienne Cupples, Fernando Rivadeneira, Margreet Kloppenburg, Marjolein Peters, Tim D Spector, Albert Hofman, P Eline Slagboom, Rob G H H Nelissen, André G Uitterlinden, David T Felson, Ana M Valdes, Ingrid Meulenbelt, Joyce J B van Meurs
OBJECTIVE: Osteoarthritis (OA) is the most common form of arthritis and the leading cause of disability in the elderly. Of all the joints, genetic predisposition is strongest for OA of the hand; however, only few genetic risk loci for hand OA have been identified. Our aim was to identify novel genes associated with hand OA and examine the underlying mechanism. METHODS: We performed a genome-wide association study of a quantitative measure of hand OA in 12 784 individuals (discovery: 8743, replication: 4011)...
August 30, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28816531/prevalence-and-predictors-of-primary-hyperparathyroidism-amongpatients-with-urolithiasis
#11
S Sharma, A Rastogi, S K Bhadada, P Singh, S Varshney, A Behera, A Bhansali, S K Singh, D S Rao
BACKGROUND: Urolithiasis may be the only presenting manifestation of primary hyperparathyroidism (PHPT), and early detection of PHPT in such patients may prevent future urolithiasis and other PHPT complications. OBJECTIVES: To study the prevalence and predictors of PHPT in patients presenting with urolithiasis. SUBJECTS & METHODS: Consecutive patients presenting with urolithiasis were evaluated for clinical and biochemical manifestations of PHPT with serum and urine calcium, serum intact parathyroid hormone and 25 (OH) vitamin D...
August 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28748891/study-of-chronic-kidney-disease-mineral-bone-disorders-in-newly-detected-advanced-renal-failure-patients-a-hospital-based-cross-sectional-study
#12
Praveen Kumar Etta, R K Sharma, Amit Gupta
We aim to evaluate the disturbances in mineral metabolism, abnormalities in bone mineral density (BMD), and extraskeletal calcification in newly detected, untreated predialysis stage 4 and 5 chronic kidney disease (CKD) patients at a tertiary care hospital in North India. This is cross-sectional observational study. A total of 95 (68 males, 27 females) newly detected patients underwent clinical evaluation, biochemical assessment [serum calcium, phosphorus, alkaline phosphatase (ALP), albumin, creatinine, intact parathyroid hormone (iPTH), 25- hydroxyvitamin D (25(OH)D)], BMD measurement (at spine, hip, and forearm) by dual-energy X-ray absorptiometry (DXA), lateral abdominal radiograph [for abdominal aortic calcification (AAC)], skeletal survey (to look for any abnormality including fractures), and echocardiography [for any cardiac valvular calcification (CVC)]...
July 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28734922/warfarin-use-is-associated-with-progressive-coronary-arterial-calcification-insights-from-serial-intravascular-ultrasound
#13
Jordan Andrews, Peter J Psaltis, Ozgur Bayturan, Mingyuan Shao, Brian Stegman, Mohamed Elshazly, Samir R Kapadia, E Murat Tuzcu, Steven E Nissen, Stephen J Nicholls, Rishi Puri
OBJECTIVES: This study compared serial changes in coronary percent atheroma volume (PAV) and calcium index (CaI) in patients with coronary artery disease who were treated with and without warfarin. BACKGROUND: Warfarin blocks the synthesis and activity of matrix Gla protein, a vitamin K-dependent inhibitor of arterial calcification. The longitudinal impact of warfarin on serial coronary artery calcification in vivo in humans is unknown. METHODS: In a post hoc patient-level analysis of 8 prospective randomized trials using serial coronary intravascular ultrasound examinations, this study compared changes in PAV and CaI in matched arterial segments in patients with coronary artery disease who were treated with (n = 171) and without (n = 4,129) warfarin during an 18- to 24-month period...
July 13, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28714498/chondrodysplasia-punctata-a-case-report-of-fetal-warfarin-syndrome
#14
S Songmen, O B Panta, S S Paudel, R K Ghimire
Chondrodysplasia punctata is abnormal calcification in the cartilage of developing bones and has been seen in association with deranged vitamin K metabolism. Warfarin, an oral anticoagulant acting on vitamin K dependent clotting factors is known to cause chondrodysplasia punctata. Despite the knowledge of the condition the management of patients with prosthetic heart valves might require use of the drug for anticoagulation. Here, we present a case of a fetal warfarin syndrome in a second born child of a 27 year lady under warfarin for prosthetic heart valve...
January 2017: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/28707070/functional-role-of-matrix-gla-protein-in-glioma-cell-migration
#15
Mu-Hui Fu, Chih-Yen Wang, Yun-Ti Hsieh, Kuan-Min Fang, Shun-Fen Tzeng
Glioblastoma multiforme (GBM) is the most common and aggressive brain tumor subtype. Despite that metastasis of GBM beyond the central nervous system (CNS) is rare, its malignancy is attributed to the highly infiltration trait, leading to the difficulty of complete surgical excision. Matrix gla protein (MGP) is a vitamin K-dependent small secretory protein, and functions as a calcification inhibitor. The involvement of MGP function in glioma cell dynamics remains to be clarified. The study showed that a low proliferative rat C6 glioma cell line named as C6-2 exhibited faster migratory and invasive capability compared to that observed in a high tumorigenic rat C6 glioma cell line (called as C6-1)...
July 13, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28703931/rationale-and-design-of-a-randomized-trial-of-apixaban-vs-warfarin-to-evaluate-atherosclerotic-calcification-and-vulnerable-plaque-progression
#16
Kazuhiro Osawa, Rine Nakanishi, Theingi Tiffany Win, Dong Li, Sina Rahmani, Negin Nezarat, Nasim Sheidaee, Matthew J Budoff
Vitamin K antagonists (VKAs) are known to increase vascular calcification, suggesting increased cardiovascular disease events. Apixaban is an oral direct factor Xa inhibitor superior to warfarin at preventing stroke or systemic embolism and may stabilize coronary atherosclerosis. The potential benefits of avoiding VKA therapy and the favorable effects of factor Xa inhibitors could contribute to cardiovascular disease event reduction. We hypothesized that apixaban inhibits vascular calcification and coronary atherosclerosis progression compared with warfarin in patients with atrial fibrillation (AF)...
July 13, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28698808/vitamins-k1-and-k2-the-emerging-group-of-vitamins-required-for-human-health
#17
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/28657840/therapeutic-warfarin-use-and-the-extrahepatic-functions-of-vitamin-k-dependent-proteins
#18
C J Donaldson, D J Harrington
The impact of warfarin therapy on the functions of extrahepatic vitamin K-dependent proteins (VKDP) is less clearly understood and less widely recognised in clinical practice than that on the hepatic counterparts (clotting factors II, VII, IX and X). Warfarin inhibits osteocalcin, an abundant extrahepatic VKDP involved in the mineralisation and maturation of bone and thus, primarily by this mechanism, may have an adverse effect on bone health. Whilst some studies do link warfarin use to an increase in osteoporosis and fracture risk others have not...
October 2017: British Journal of Biomedical Science
https://www.readbyqxmd.com/read/28639365/vascular-calcification-vitamin-k-and-warfarin-therapy-possible-or-plausible-connection
#19
Aino Siltari, Heikki Vapaatalo
Atherosclerosis is a pathological process underpinning many cardiovascular diseases; it is the main cause of global mortality. Atherosclerosis is characterized by an invasion of inflammatory cells, accumulation of lipids and the formation of fatty streaks (plaques) which subsequently allow accumulation of calcium and other minerals leading to a disturbance in the vascular endothelium and its regulatory role in arterial function. Vascular calcification is a different process, stringently regulated mainly by local factors, in which osteoblast-like cells accumulate in the muscular layer of arteries ultimately taking on the physiological appearance of bone...
June 21, 2017: Basic & Clinical Pharmacology & Toxicology
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
#20
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
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