2,475 results match your criteria Vitamin K Deficiency


Vitamin K deficiency bleeding in an apparently healthy newborn infant: the compelling need for evidence-based recommendation.

Ital J Pediatr 2019 Mar 4;45(1):30. Epub 2019 Mar 4.

Early infancy Sub-intensive Care Unit, Città della Salute e della Scienza di Torino, "Regina Margherita" Children's Hospital, Piazza Polonia, 94, 10126, Turin, Italy.

Background: Vitamin K is a key point for guarantee normal blood clotting and its level in newborns is commonly low, so a supplementation after delivery is mandatory. Vitamin K prophylaxis in newborns is still an open field of debate: many types of protocol have been proposed in different years and Countries, and sometimes with great variability inside the same Nation (for instance, in Italy a national consensus is not available, so different protocols are employed). Recommendations include different protocols for healthy newborns born at term, but the unpreventable presence of bleeding favouring factors (i. Read More

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http://dx.doi.org/10.1186/s13052-019-0625-yDOI Listing

[Severe coagulation abnormality during treatment for ischemic enteritis in an older patient taking a direct oral anticoagulant].

Nihon Ronen Igakkai Zasshi 2019 ;56(1):74-78

Department of Neurology and Cerebrovascular Medicine, Saitama Medical University International Medical Center.

An 85-year-old woman hospitalized for rehabilitation after cerebral infarction developed persistent bloody diarrhea and was transferred to our hospital (day 1). Contrast-enhanced computed tomography of the abdomen showed edematous thickening extending from the left side of the transverse colon to the rectum, with decreased mucosal enhancement. She was diagnosed with ischemic enteritis. Read More

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https://www.jstage.jst.go.jp/article/geriatrics/56/1/56_56.7
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http://dx.doi.org/10.3143/geriatrics.56.74DOI Listing
January 2019
4 Reads

Association of the Inactive Circulating Matrix Gla Protein with Vitamin K Intake, Calcification, Mortality, and Cardiovascular Disease: A Review.

Int J Mol Sci 2019 Feb 1;20(3). Epub 2019 Feb 1.

Division of Nephrology and Hypertension, 1st Department of Internal Medicine, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece.

Matrix Gla Protein (MGP), a small Gla vitamin K-dependent protein, is the most powerful natural occurring inhibitor of calcification in the human body. To become biologically active, MGP must undergo vitamin K-dependent carboxylation and phosphorylation. Vitamin K deficiency leads to the inactive uncarboxylated, dephosphorylated form of MGP (dpucMGP). Read More

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http://dx.doi.org/10.3390/ijms20030628DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6387246PMC
February 2019

Associations of vitamin K status with mortality and cardiovascular events in peritoneal dialysis patients.

Int Urol Nephrol 2019 Jan 28. Epub 2019 Jan 28.

Department of Nephrology, the 2nd Affiliated Hospital of Guangzhou Medical University, Guangdong, People's Republic of China.

Purpose: Vitamin K deficiency, expressed by a high level of desphospho-uncarboxylated matrix GLA protein (dp-ucMGP), is highly prevalent in dialysis patients. However, the predictive ability of the vitamin K status remains unclear in continuous ambulatory peritoneal dialysis (CAPD) patients.

Methods: 158 prevalent CAPD patients with a median level of dp-ucMGP of 1093 (752, 1485) pmol/L were enrolled. Read More

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http://dx.doi.org/10.1007/s11255-019-02080-xDOI Listing
January 2019
3 Reads

Effect of 6-Month Vitamin D Supplementation on Plasma Matrix Gla Protein in Older Adults.

Nutrients 2019 Jan 22;11(2). Epub 2019 Jan 22.

Department of Nephrology, and Amsterdam Cardiovascular Science, VU University Medical Center, 1081 HV Amsterdam, The Netherlands.

Vitamin D supplementation has been widely promoted to restore 25-hydroxyvitamin D concentrations; however, experimental evidence suggests a nutrient interaction with vitamin K. We assessed the effects of 1200 IU vitamin D₃ per day versus placebo for six months on vitamin K status in a randomized, double-blind, placebo-controlled trial with participants aged 60⁻80 years with depressive symptoms and ≥1 functional limitation for a secondary analysis. Stored baseline and six-month follow-up blood samples were available for 131 participants ( = 65 placebo vs. Read More

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http://dx.doi.org/10.3390/nu11020231DOI Listing
January 2019
1 Read

Vitamin K in Chronic Kidney Disease.

Nutrients 2019 Jan 14;11(1). Epub 2019 Jan 14.

Department of Medicine, Division of Nephrology, Massachusetts General Hospital, Boston, MA 02114, USA.

Vitamin K is a composite term referring to a group of fat-soluble vitamins that function as a cofactor for the enzyme γ-glutamyl carboxylase (GGCX), which activates a number of vitamin K-dependent proteins (VKDPs) involved in haemostasis and vascular and bone health. Accumulating evidence demonstrates that chronic kidney disease (CKD) patients suffer from subclinical vitamin K deficiency, suggesting that this represents a population at risk for the biological consequences of poor vitamin K status. This deficiency might be caused by exhaustion of vitamin K due to its high requirements by vitamin K-dependent proteins to inhibit calcification. Read More

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http://dx.doi.org/10.3390/nu11010168DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6356438PMC
January 2019

Emerging Role of Vitamins D and K in Modulating Uremic Vascular Calcification: The Aspect of Passive Calcification.

Nutrients 2019 Jan 12;11(1). Epub 2019 Jan 12.

Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan.

Vascular calcification is a critical complication in patients with chronic kidney disease (CKD) because it is predictive of cardiovascular events and mortality. In addition to the traditional mechanisms associated with endothelial dysfunction and the osteoblastic transformation of vascular smooth muscle cells (VSMCs), the regulation of calcification inhibitors, such as calciprotein particles (CPPs) and matrix vesicles plays a vital role in uremic vascular calcification in CKD patients because of the high prevalence of vitamin K deficiency. Vitamin K governs the gamma-carboxylation of matrix Gla protein (MGP) for inhibiting vascular calcification, and the vitamin D binding protein receptor is related to vitamin K gene expression. Read More

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http://dx.doi.org/10.3390/nu11010152DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6356797PMC
January 2019
1 Read

How to Optimize Activated Partial Thromboplastin Time (APTT) Testing: Solutions to Establishing and Verifying Normal Reference Intervals and Assessing APTT Reagents for Sensitivity to Heparin, Lupus Anticoagulant, and Clotting Factors.

Semin Thromb Hemost 2019 Feb 10;45(1):22-35. Epub 2019 Jan 10.

Department of Haematology, NSW Health Pathology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.

The activated partial thromboplastin time (APTT) assay is a very common coagulation test, used for several reasons. The test is conventionally used for assessing the contact factor (intrinsic) pathway of blood coagulation, and thus for screening deficiencies in this pathway, most typically factors VIII, IX, and XI. The APTT is also sensitive to contact factor deficiencies, including factor XII, prekallikrein, and high-molecular-weight kininogen. Read More

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http://dx.doi.org/10.1055/s-0038-1677018DOI Listing
February 2019
6 Reads

Prevalence of vitamin K deficiency in older people with hip fracture.

Acta Clin Belg 2019 Jan 8:1-5. Epub 2019 Jan 8.

a Department of Ageing & Health , Guy's & St. Thomas' NHS Trust , London , UK.

Introduction: Vitamin K plays an important role in blood coagulation. Diet is the main source of vitamin K and body stores are depleted in days, hence deficiency is common in malnourished older people. A high proportion of people who sustain a hip fracture are already malnourished, compounded by fasting for surgery which might further increase deficiency. Read More

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http://dx.doi.org/10.1080/17843286.2018.1564174DOI Listing
January 2019

The Effectiveness of Topical Cerium Nitrate-Silver Sulfadiazine Application on Overall Outcome in Patients with Calciphylaxis.

Dermatology 2019 3;235(2):120-129. Epub 2019 Jan 3.

Department of Nephrology and Organ Transplantation, Center for Rare Renal Disease, University Hospital of Toulouse, Toulouse,

Background: Calciphylaxis (CPX) is a rare and life-threatening disease characterized by vascular calcification and development of painful and necrotizing skin lesions with a challenging management. Mechanisms of CPX are complex and include an imbalance between vascular calcification promoters and inhibitors, and frequently vitamin K deficiency.

Objectives: To describe the various presentations and identify predictive factors of death in patients with CPX. Read More

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http://dx.doi.org/10.1159/000493975DOI Listing
January 2019
1 Read

Newborn Vitamin K Prophylaxis: A Historical Perspective to Understand Modern Barriers to Uptake.

Hosp Pediatr 2019 Jan;9(1):55-60

Department of Women's and Children's Health, Dunedin School of Medicine,

Since its initial discovery almost a century ago, vitamin K has been labeled as both lifesaving and malignancy causing. This has led to debate of not only its use in general but also regarding its appropriate dose and route. In this article, we review through a historical lens the past 90 years of newborn vitamin K from its discovery through to its modern use of preventing vitamin K deficiency bleeding (VKDB). Read More

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http://hosppeds.aappublications.org/lookup/doi/10.1542/hpeds
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http://dx.doi.org/10.1542/hpeds.2018-0104DOI Listing
January 2019
4 Reads

Evaluation of vitamin K status and rationale for vitamin K supplementation in dialysis patients.

Nephrol Dial Transplant 2018 Dec 26. Epub 2018 Dec 26.

Division of Nephrology and Infectious Diseases, Department of Internal Medicine, AZ Sint-Jan Brugge, Brugge, and Ghent University, Ghent, Belgium.

The cardinal biological role of vitamin K is to act as cofactor for the carboxylation of a number of vitamin K-dependent proteins, some of which are essential for coagulation, bone formation and prevention of vascular calcification. Functional vitamin K deficiency is common and severe among dialysis patients and has garnered attention as a modifiable risk factor in this population. However, no single biochemical parameter can adequately assess vitamin K status. Read More

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http://dx.doi.org/10.1093/ndt/gfy373DOI Listing
December 2018

Acquired Factor VII Deficiency in Association with Pyelonephritis.

J Assoc Physicians India 2018 May;66(5):95-6

Junior Resident, SGRD-IMSAR, Sri Amritsar, Punjab.

Acquired factor VII (FVII) deficiency in the absence of vitamin K deficiency, oral, synthetic liver dysfunction, or DIC is rare, with only a handful of cases published in literature. Congenital deficiency of FVII is well known but, little is known about secondary FVII deficiency and its management. The knowledge of this syndrome should avoid false diagnosis of congenital factor VII deficiency. Read More

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May 2018
3 Reads

Surgery in patients with congenital factor VII deficiency - a single center study.

Pol Przegl Chir 2018 May;90(5):1-5

Instytut Hematologii i Transfuzjologii w Warszawie Klinika Chirurgii Ogólnej, Onkologicznej i Metabolicznej.

Introduction: Congenital factor VII deficiency is a rare hemorrhagic disorder inherited in an autosomal recessive pattern. Surgical treatment with insufficient diathesis correction is burdened with high risk of bleeding complications. The aim of the study was evaluation of the surgical outcome in patients with congenital factor VII deficiency and assessment of the efficacy and safety of recombinant activated factor VII (rFVIIa) used for perioperative hemostatic coverage in our two schemas of substitutive therapy. Read More

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https://ppch.pl/gicid/01.3001.0012.0668
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http://dx.doi.org/10.5604/01.3001.0012.0668DOI Listing
May 2018
12 Reads

Vitamin K deficiency in critical ill patients; a prospective observational study.

J Crit Care 2019 Feb 28;49:105-109. Epub 2018 Oct 28.

Institution of Clinical Sciences Lund, Medical Faculty, Lund University, S-22185 Lund, Sweden.; Department of Intensive and Perioperative Care, Skane University Hospital, S-22185 Lund, Sweden. Electronic address:

Background: Vitamin K is a cofactor for proteins involved in cardiovascular health, bone metabolism and cancer. Measuring uncarboxylated prothrombin, also termed as "protein induced by vitamin K absence or antagonism for factor II (PIVKA-II)", has been used to assess vitamin K status. High levels may indicate vitamin K deficiency. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S08839441183094
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http://dx.doi.org/10.1016/j.jcrc.2018.10.022DOI Listing
February 2019
10 Reads

Vitamins D and K as Factors Associated with Osteopathy in Chronic Pancreatitis: A Prospective Multicentre Study (P-BONE Study).

Clin Transl Gastroenterol 2018 Oct 15;9(10):197. Epub 2018 Oct 15.

Digestive & Liver Disease Unit, Sant'Andrea Hospital, "La Sapienza", Rome, Italy.

Background: Osteopathy is common in patients with chronic pancreatitis (CP), but previous studies carry several limitations. Vitamin K is essential for bone metabolism, but its role in this setting has never been investigated. Our aim is to assess the prevalence of osteoporosis and osteopenia in CP patients, and to investigate the association between osteopathy and CP features and nutritional parameters, especially vitamin D and K levels. Read More

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http://www.nature.com/articles/s41424-018-0066-8
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http://dx.doi.org/10.1038/s41424-018-0066-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6189068PMC
October 2018
8 Reads

Position Statement: Guidelines for vitamin K prophylaxis in newborns: A joint statement of the Canadian Paediatric Society and the College of Family Physicians of Canada.

Can Fam Physician 2018 Oct;64(10):736-739

Member of the Maternity and Newborn Care Program Committee of the College of Family Physicians of Canada.

Newborns are at risk for vitamin K deficiency bleeding (VKDB) caused by inadequate prenatal storage and deficiency of vitamin K in breast milk. Systematic review of evidence to date suggests that a single intramuscular (IM) injection of vitamin K at birth effectively prevents VKDB. Current scientific data suggest that single or repeated doses of oral (PO) vitamin K are less effective than IM vitamin K in preventing VKDB. Read More

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6184976PMC
October 2018
5 Reads

Vitamin K Administration.

Authors:
Poj Lysouvakon

Pediatr Ann 2018 10;47(10):e383-e384

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http://dx.doi.org/10.3928/19382359-20180926-01DOI Listing
October 2018
1 Read

Neonatal vitamin K deficiency in the son of a mother with short bowel syndrome.

Pediatr Int 2018 Oct 8;60(10):991-992. Epub 2018 Oct 8.

Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan.

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http://doi.wiley.com/10.1111/ped.13684
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http://dx.doi.org/10.1111/ped.13684DOI Listing
October 2018
17 Reads

Fetal intracranial hemorrhage due to maternal subclinical vitamin K deficiency associated with long-term eating disorder.

J Obstet Gynaecol Res 2019 Feb 25;45(2):461-465. Epub 2018 Sep 25.

Department of Pediatrics, Iwate Medical University School of Medicine, Morioka, Japan.

Vitamin K deficiency in pregnant women causes intracranial hemorrhage (ICH) in fetuses. Fetal ICH frequently causes life-threatening and persistent neurological damage. However, indicators for preventing fetal ICH are not established. Read More

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http://dx.doi.org/10.1111/jog.13825DOI Listing
February 2019
7 Reads

Factor VII deficiency - an enigma; clinicohematological profile in 12 cases.

Hematology 2019 Dec 7;24(1):97-102. Epub 2018 Sep 7.

a Department of Hematology , All India Institute of Medical Sciences , New Delhi , India.

Objective: Factor VII deficiency is the commonest of the rare bleeding disorders with limited knowledge on clinical profile. The objective of this study was to study the prevalence and clinico-hematological profile of factor VII-deficient patients.

Methods: It is a retrospective observational study of probable inherited factor VII deficiency covering 18 months. Read More

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http://dx.doi.org/10.1080/10245332.2018.1518799DOI Listing
December 2019
20 Reads
1.190 Impact Factor

α-Tocopherol Intake Decreases Phylloquinone Concentration in Bone but Does Not Affect Bone Metabolism in Rats.

J Nutr Sci Vitaminol (Tokyo) 2018 ;64(4):243-250

Department of Home Economics, Aichi Gakusen University.

Previous studies have shown that α-tocopherol intake lowers phylloquinone (PK) concentration in some extrahepatic tissues in rats. The study's aim was to clarify the effect of α-tocopherol intake on vitamin K concentration in bone, as well as the physiological action of vitamin K. Male Wistar rats were divided into 4 groups. Read More

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http://dx.doi.org/10.3177/jnsv.64.243DOI Listing
January 2019
10 Reads

The Vitamin K Metabolome in Chronic Kidney Disease.

Nutrients 2018 Aug 12;10(8). Epub 2018 Aug 12.

Department of Biomedical and Molecular Science, Queen's University, Kingston, ON K7L 3V6, Canada.

The purpose of this review is to summarize the research to date on the impact of chronic kidney disease (CKD) on the vitamin K metabolome. Vitamin K-dependent proteins contribute to cardiovascular disease (CVD) prevention via the prevention of ectopic mineralization. Sub-clinical vitamin K deficiency is common in CKD patients, and evidence suggests that it may contribute to the CVD burden in this population. Read More

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http://dx.doi.org/10.3390/nu10081076DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6115832PMC
August 2018
16 Reads

Refusal of Vitamin K Injection: Survey of the Current Literature and Practical Tips for Pediatricians.

Pediatr Ann 2018 Aug;47(8):e334-e338

Vitamin K refusal and associated sequelae of vitamin K deficiency bleed (VKDB) in the newborn period is becoming a more common occurrence. We present six recent cases from a 4-month period in 2017 of parent refusal of vitamin K and describe the reasons for refusal and the clinical outcomes of these infants. There have been a number of case reports citing the rising incidence of VKDB and the reasons why parents refuse. Read More

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https://www.healio.com/doiresolver?doi=10.3928/19382359-2018
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http://dx.doi.org/10.3928/19382359-20180709-02DOI Listing
August 2018
10 Reads

Genetic Polymorphism of VKORC1-1639 in Children With Intracranial Hemorrhage Due to Vitamin K Deficiency.

Clin Appl Thromb Hemost 2018 Aug 13:1076029618792302. Epub 2018 Aug 13.

5 Faculty of Medicine, Division of Pediatric Neurology, Department of Pediatrics, Erciyes University, Kayseri, Turkey.

Intracranial hemorrhage due to vitamin K deficiency is a serious disease that can lead to morbidity, mortality, and mental retardation. Our goal in this study is to determine the frequency of VKORC1-1639 G>A polymorphism in patients who have undergone intracranial hemorrhage due to vitamin K deficiency bleeding (VKDB). To study VKORC1-1639 G>A polymorphism, blood was drawn from patients (n = 51, age 8:0 ± 6:5 years) followed at the Pediatric Neurology and Hematology section, Faculty of Medicine, Erciyes University, between 1990 and 2016, diagnosed with VKDB as idiopathic or from patients diagnosed with intracranial hemorrhage due to secondary vitamin K deficiency and also from volunteers (n = 51, age 11 ± 4. Read More

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http://dx.doi.org/10.1177/1076029618792302DOI Listing
August 2018
13 Reads

Calciphylaxis in a dialysis patient successfully treated with high-dose vitamin K supplementation.

Clin Kidney J 2018 Aug 10;11(4):528-529. Epub 2017 Nov 10.

Canberra Hospital Renal Unit, Garran, ACT, Australia.

Calciphylaxis has high mortality. Vitamin K deficiency is common in haemodialysis patients and may be a trigger for calciphylaxis due to its role in activating matrix Gla protein (a tissue inhibitor of calcification). We report the case of a 43-year-old female haemodialysis patient who developed calciphylaxis. Read More

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http://dx.doi.org/10.1093/ckj/sfx126DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6070075PMC
August 2018
5 Reads

[Shaken-baby syndrome and unilateral retinal hemorrhage?]

Ophthalmologe 2018 Aug 2. Epub 2018 Aug 2.

Augenklinik und Poliklinik, Universitätsklinikum Würzburg, Josef-Schneider-Str. 11, 97080, Würzburg, Deutschland.

Unilateral retinal hemorrhage in infants can be caused by vitamin K deficiency. The case described here with fatal outcome presents the medical history of a 2-month-old infant with vitamin K deficiency bleeding caused by the refusal of vitamin K prophylaxis by the parents. Ocular signs were unilateral intraretinal hemorrhage with Roth spots and preretinal hemorrhage over the complete back of the eye. Read More

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http://link.springer.com/10.1007/s00347-018-0764-3
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http://dx.doi.org/10.1007/s00347-018-0764-3DOI Listing
August 2018
13 Reads

Vitamin K Deficiency Induced by Warfarin Is Associated With Cognitive and Behavioral Perturbations, and Alterations in Brain Sphingolipids in Rats.

Front Aging Neurosci 2018 16;10:213. Epub 2018 Jul 16.

Montreal Heart Institute Research Centre, Montreal, QC, Canada.

Initially discovered for its role in blood coagulation, there is now convincing evidence that vitamin K (VK) has important actions in the nervous system. In brain, VK is present in the form of menaquinone-4 (MK-4), a byproduct of the main dietary source, phylloquinone. It contributes to the biological activation of various proteins (i. Read More

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https://www.frontiersin.org/article/10.3389/fnagi.2018.00213
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http://dx.doi.org/10.3389/fnagi.2018.00213DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6054920PMC
July 2018
19 Reads

Menadione sodium bisulfite inhibits the toxic aggregation of amyloid-β(1-42).

Biochim Biophys Acta Gen Subj 2018 Jul 20;1862(10):2226-2235. Epub 2018 Jul 20.

Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. Electronic address:

Protein misfolding and aggregation are associated with amyloidosis. The toxic aggregation of amyloid-β 1-42 (Aβ42) may disrupt cell membranes and lead to cell death and is thus regarded as a contributing factor in Alzheimer's disease (AD). 1,4-naphthoquinone (NQ) has been shown to exhibit strong anti-aggregation effects on amyloidogenic proteins such as insulin and α-synuclein; however, its high toxicity and poor solubility limit its clinical application. Read More

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http://dx.doi.org/10.1016/j.bbagen.2018.07.019DOI Listing
July 2018
15 Reads
4.380 Impact Factor

X-Linked Chronic Granulomatous Disease: Initial Presentation with Intracranial Hemorrhage from Vitamin K Deficiency in Infant.

Case Rep Pediatr 2018 24;2018:7041204. Epub 2018 Jun 24.

Division of Hematology and Oncology, Department of Pediatrics, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand.

Vitamin K deficiency bleeding (VKDB) is a life-threatening condition and can be found in children as early as neonatal period with early onset intracranial hemorrhage (ICH). Here, we reported a 1-year-old boy who initially presented with intracranial hemorrhage secondary to vitamin K deficiency since 3 months of age and later found to have XL-CGD which was complicated by malabsorption due to severe vaccine-associated mycobacterial disease. Read More

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https://www.hindawi.com/journals/cripe/2018/7041204/
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http://dx.doi.org/10.1155/2018/7041204DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6035845PMC
June 2018
6 Reads

The sample that would not clot.

Clin Chim Acta 2018 Oct 26;485:272-274. Epub 2018 Jun 26.

University of Virginia Department of Pathology, Charlottesville, VA, United States. Electronic address:

Background: Vitamin K is a vital component within both the intrinsic and extrinsic coagulation cascade as certain factors (II, VII, IX, X and protein C and S) utilize vitamin K as a cofactor during post translational modification. Deficiency of vitamin K can result in the inability to properly form blood clots, both in vivo and in vitro, due to reduced vitamin K dependent factor levels and function. Vitamin K deficiency can result from congenital causes, such as VKOR or CYP2C9 mutations, or acquired causes, such as nutritional deficiencies, antibiotic therapy, or supra-therapeutic warfarin dosing. Read More

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http://dx.doi.org/10.1016/j.cca.2018.06.026DOI Listing
October 2018

Vitamin K status and physical decline in older adults-The Longitudinal Aging Study Amsterdam.

Maturitas 2018 Jul 30;113:73-79. Epub 2018 Apr 30.

Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands.

Objective: We examined the association between vitamin K status and physical functioning over 13 years in the Longitudinal Aging Study Amsterdam.

Study Design: Longitudinal cohort study of 633 community-dwelling adults from the Longitudinal Aging Study Amsterdam (LASA) aged 55-65 years (54% women).

Main Outcome Measures: At baseline (2002-2003), plasma desphospho-uncarboxylated matrix Gla protein (dp-ucMGP) was measured with a sandwich ELISA as a marker of vitamin K status. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S03785122183003
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http://dx.doi.org/10.1016/j.maturitas.2018.04.013DOI Listing
July 2018
4 Reads

Decreased Levels of Circulating Carboxylated Osteocalcin in Children with Low Energy Fractures: A Pilot Study.

Nutrients 2018 Jun 6;10(6). Epub 2018 Jun 6.

Department of Biochemistry, Cardiovascular Research Institute Maastricht, University Maastricht, 6200 MD Maastricht, The Netherlands.

Objective: In the past decades, an increased interest in the roles of vitamin D and K has become evident, in particular in relation to bone health and prevention of bone fractures. The aim of the current study was to evaluate vitamin D and K status in children with low-energy fractures and in children without fractures.

Methods: The study group of 20 children (14 boys, 6 girls) aged 5 to 15 years old, with radiologically confirmed low-energy fractures was compared with the control group of 19 healthy children (9 boys, 10 girls), aged 7 to 17 years old, without fractures. Read More

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http://dx.doi.org/10.3390/nu10060734DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6024307PMC
June 2018
1 Read

Vitamin K Deficiency in Patients After Restorative Proctocolectomy.

Inflamm Bowel Dis 2019 Feb;25(3):e17-e18

Department of Paediatric Gastroenterology and Metabolic Diseases, Poznań, Poland.

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http://dx.doi.org/10.1093/ibd/izy184DOI Listing
February 2019
4 Reads

A rare case of fetal extensive intracranial hemorrhage and whole-cerebral hypoplasia due to latent maternal vitamin K deficiency.

J Neonatal Perinatal Med 2018 ;11(2):191-194

Department of Perinatal and Neonatal Medicine, Aichi Medical University Sciences, Karimata, Nagakute, Aichi, Japan.

We present here a late preterm infant with extensive brain lesions resulting from vitamin K deficiency. A female infant was born after 35 weeks of gestation by emergent cesarean section because of non-reassuring fetal status. Her mother had severe eating disorder and recurrent vomiting since early pregnancy. Read More

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http://dx.doi.org/10.3233/NPM-181745DOI Listing
December 2018
2 Reads

Coagulopathy secondary to vitamin K deficiency caused by severe diarrhea.

Am J Emerg Med 2017 04 16;35(4):660.e1-660.e2. Epub 2014 Oct 16.

Good Samaritan Hospital Medical Center, 1000 Montauk Highway, West Islip, NY 11795.

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http://dx.doi.org/10.1016/j.ajem.2014.10.028DOI Listing
April 2017
1 Read

Comparison of biliary atresia with and without intracranial hemorrhage.

J Pediatr Surg 2018 Nov 1;53(11):2245-2249. Epub 2018 May 1.

Department of Pediatric Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.

Background/purpose: Intracranial hemorrhage (ICH) is a severe complication of biliary atresia (BA). We aimed to compare the clinical data of BA patients with and without ICH.

Methods: Sixty-three BA patients who underwent Kasai portoenterostomy were included in this study. Read More

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http://dx.doi.org/10.1016/j.jpedsurg.2018.04.031DOI Listing
November 2018
2 Reads

A potential biotechnological process for the sustainable production of vitamin K.

Crit Rev Biotechnol 2018 May 24:1-19. Epub 2018 May 24.

a School of Chemical and Biomolecular Engineering , University of Sydney , Sydney , NSW , Australia.

The primary objective of this review is to propose an approach for the biosynthesis of phylloquinone (vitamin K) based upon its known sources, its role in photosynthesis and its biosynthetic pathway. The chemistry, health benefits, market, and industrial production of vitamin K are also summarized. Vitamin K compounds (K vitamers) are required for the normal function of at least 15 proteins involved in diverse physiological processes such as coagulation, tissue mineralization, inflammation, and neuroprotection. Read More

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http://dx.doi.org/10.1080/07388551.2018.1474168DOI Listing
May 2018
6 Reads

Circulating Dephospho-Uncarboxylated Matrix Gla-Protein Is Associated With Kidney Dysfunction and Arterial Stiffness.

Am J Hypertens 2018 Aug;31(9):988-994

Department of Medicine and Radiology, Corporal Michael J. Crescenz VAMC, Philadelphia, Pennsylvania, USA.

Background: Large artery stiffening is increased in advanced chronic kidney disease (CKD) but likely develops progressively in earlier stages of CKD. Active matrix Gla-protein (MGP) is a potent vitamin K-dependent inhibitor of vascular calcification. A recent animal model demonstrated intrinsic abnormalities in vitamin K metabolism even in early CKD, but whether early human CKD is associated with vascular vitamin K deficiency is unknown. Read More

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http://dx.doi.org/10.1093/ajh/hpy079DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6077812PMC
August 2018
26 Reads
2.852 Impact Factor

Vitamin K‑dependent proteins involved in bone and cardiovascular health (Review).

Mol Med Rep 2018 Jul 27;18(1):3-15. Epub 2018 Apr 27.

Department of Physiology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China.

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. Read More

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http://dx.doi.org/10.3892/mmr.2018.8940DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6059683PMC
July 2018
1 Read

Review on Vitamin K Deficiency and its Biomarkers: Focus on the Novel Application of PIVKA-II in Clinical Practice.

Clin Lab 2018 Apr;64(4):413-424

Background: Vitamin K (VK) is a co-factor of the γ-glutamyl carboxylase that catalyzes the conversion of glutamate residues to γ-carboxyglutamate in VK-dependent proteins. The carboxylation reaction imparts the essential calcium-binding residues for the biological function of several proteins involved in the process of coagulation and bone metabolism. VK deficiency is frequently encountered in newborns and can lead to fatal hemorrhagic complications. Read More

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http://dx.doi.org/10.7754/Clin.Lab.2017.171020DOI Listing
April 2018
5 Reads

Slow Elevation in Protein C Activity without a Mutation in a Neonate with Intracranial Hemorrhage.

AJP Rep 2018 Apr 12;8(2):e68-e70. Epub 2018 Apr 12.

Department of Postgraduate Education and Training, National Center for Child Health and Development, Tokyo, Japan.

Severe protein C (PC) deficiency leads to purpura fulminans and stroke in newborns. However, the clinical impact of plasma PC activity on the development of neonatal cerebral disease remains elusive. We report a case of hemorrhagic stroke associated with neonatal asphyxia and severe PC deficiency. Read More

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http://dx.doi.org/10.1055/s-0038-1639614DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5897120PMC
April 2018
8 Reads

Fat soluble vitamin levels in children with newly diagnosed celiac disease, a case control study.

BMC Pediatr 2018 04 9;18(1):130. Epub 2018 Apr 9.

Department of Biochemistry, Adnan Menderes University Medical Faculty, Aydın, Turkey.

Background: In children diagnosed with celiac disease, fat soluble vitamin levels were aimed to be evaluated and it was intended to determine whether fat soluble vitamin levels were needed to be assessed routinely in these patients during diagnosis.

Methods: Between May 2015-May 2016, diagnosis symptoms of celiac patients (CD) in newly diagnosed pediatric group were questioned, fat soluble vitamin levels simultaneous with intestinal biopsies were evaluated. Vitamin levels were compared with those of healthy control group. Read More

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http://dx.doi.org/10.1186/s12887-018-1107-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5890346PMC
April 2018
6 Reads

Controllable vitamin K deficiency under high-dose oral menatetrenone administration - a case report.

Pharmazie 2018 04;73(4):234-240

Vitamin (V) K deficiency may cause severe bleeding tendencies, which necessitates extreme caution. We report a case of a 30-year-old man diagnosed with VK deficiency of unknown etiology. He was treated with intravenous menatetrenone three times a week in an outpatient setting for about 1 year and 9 months. Read More

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http://dx.doi.org/10.1691/ph.2018.7994DOI Listing
April 2018
4 Reads

Estimated costs for treatment and prophylaxis of newborn vitamin K deficiency bleeding in Tashkent, Uzbekistan.

Nagoya J Med Sci 2018 02;80(1):11-20

Department of Healthcare Administration, Nagoya University Graduate School of Medicine, Nagoya, Japan.

Vitamin K deficiency bleeding (VKDB) is a preventable cause of infant mortality and long-term morbidity through the world. This study aimed to demonstrate the costs of VKDB treatment estimated from the hospital records in Tashkent, Uzbekistan, as well as the prophylaxis costs for mass vitamin K medication. Subjects were 50 patients with no operation and 50 patients who had received a brain operation, consecutively enrolled from 180 cases diagnosed at Republican Research Center of Emergency Medicine in 2014. Read More

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http://hdl.handle.net/2237/00027502
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http://dx.doi.org/10.18999/nagjms.80.1.11DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5857497PMC
February 2018
1 Read

Newborn haemorrhagic disorders: about 30 cases.

Pan Afr Med J 2017;28:150. Epub 2017 Oct 18.

Paediatric Medical Emergency Department, Children's Hospital, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco.

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http://dx.doi.org/10.11604/pamj.2017.28.150.13159DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5847128PMC
August 2018
10 Reads

Vitamin K deficiency: a case report and review of current guidelines.

Ital J Pediatr 2018 Mar 14;44(1):36. Epub 2018 Mar 14.

Pediatric and Infectious Disease Unit, Bambino Gesu' Children's Hospital, IRCCS, Piazza Sant'Onofrio 4, Rome, Italy.

Background: Vitamin K, a fat soluble vitamin, is a necessary cofactor for the activation of coagulation factors II, VII, IX, X, and protein C and S. In neonatal period, vitamin K deficiency may lead to Vitamin K Deficiency Bleeding (VKDB).

Case Presentation: We present the case of a 2 months and 20 days Caucasian male, presented for bleeding from the injections sites of vaccines. Read More

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http://dx.doi.org/10.1186/s13052-018-0474-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5853086PMC
March 2018
7 Reads