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Article ; Online: Enhanced vitamin K expenditure as a major contributor to vitamin K deficiency in COVID-19.

Visser, Margot P J / Walk, Jona / Vermeer, Cees / Bílková, Simona / Janssen, Rob / Mayer, Otto

International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases

2022 Volume 125, Page(s) 275–277

Abstract: Objectives: Vitamin K deficiency consistently associates with worse clinical outcome in COVID-19 ... patients. However, whether this is due to increased expenditure during inflammation or poor vitamin K ... we demonstrate normal vitamin K status prior to infection in SARS-CoV-2 positive patients, supporting the theory ...

Abstract	Objectives: Vitamin K deficiency consistently associates with worse clinical outcome in COVID-19 patients. However, whether this is due to increased expenditure during inflammation or poor vitamin K status prior to infection remained unknown. Methods: Dp-ucMGP levels of 128 individuals were measured for the post-MONICA study and were compared to SARS-CoV-2 PCR testing results. Results: Dp-ucMGP levels prior to COVID-19 infection were not significantly different comparing PCR-negative, PCR-positive and not hospitalized, and PCR-positive and hospitalized patients. Conclusion: In this study, we demonstrate normal vitamin K status prior to infection in SARS-CoV-2 positive patients, supporting the theory of increased utilisation during disease.
Language	English
Publishing date	2022-10-28
Publishing country	Canada
Document type	Journal Article
ZDB-ID	1331197-9
ISSN	1878-3511 ; 1201-9712
ISSN (online)	1878-3511
ISSN	1201-9712
DOI	10.1016/j.ijid.2022.10.030
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Article ; Online: Cellular localization of the K

Rogasevskaia, Tatiana P / Szerencsei, Robert T / Jalloul, Ali H / Visser, Frank / Winkfein, Robert J / Schnetkamp, Paul P M

Pigment cell & melanoma research

2018 Volume 32, Issue 1, Page(s) 55–67

Abstract: NCKX5 is a bidirectional K ...

Abstract	NCKX5 is a bidirectional K
MeSH term(s)	Amino Acid Sequence ; Animals ; Autoantigens/metabolism ; Calcium/metabolism ; Cell Count ; HEK293 Cells ; Humans ; Membrane Glycoproteins/metabolism ; Membrane Proteins/metabolism ; Mice ; Mutation/genetics ; Pigmentation/drug effects ; Potassium/pharmacology ; Protein Structure, Secondary ; Protein Transport/drug effects ; Sodium-Calcium Exchanger/chemistry ; Sodium-Calcium Exchanger/metabolism ; Structure-Activity Relationship ; Zebrafish ; trans-Golgi Network/drug effects ; trans-Golgi Network/metabolism
Chemical Substances	Autoantigens ; Golgin subfamily A member 2 ; Membrane Glycoproteins ; Membrane Proteins ; Sodium-Calcium Exchanger ; TGOLN2 protein, human ; Potassium (RWP5GA015D) ; Calcium (SY7Q814VUP)
Language	English
Publishing date	2018-07-25
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2409570-9
ISSN	1755-148X ; 1600-0749 ; 0893-5785 ; 1755-1471
ISSN (online)	1755-148X ; 1600-0749
ISSN	0893-5785 ; 1755-1471
DOI	10.1111/pcmr.12723
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Zs.A 2444: Show issues

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Article: Effects of Vitamin D and K on Interleukin-6 in COVID-19.

Visser, Margot P J / Dofferhoff, Anton S M / van den Ouweland, Jody M W / van Daal, Henny / Kramers, Cornelis / Schurgers, Leon J / Janssen, Rob / Walk, Jona

Frontiers in nutrition

2022 Volume 8, Page(s) 761191

Abstract: ... response with a key role for interleukin (IL)-6. Both vitamin D and K have been proposed as potential ... modulators of this process.: Methods: We assessed vitamin D and K status by measuring circulating 25 ... An intervention trial may provide insight whether vitamin K administration, either or not in combination ...

Abstract	Background: Pathology during COVID-19 infection arises partly from an excessive inflammatory response with a key role for interleukin (IL)-6. Both vitamin D and K have been proposed as potential modulators of this process. Methods: We assessed vitamin D and K status by measuring circulating 25-hydroxyvitamin D (25(OH)D) and desphospho-uncarboxylated Matrix Gla-Protein (dp-ucMGP), respectively in 135 hospitalized COVID-19 patients in relation to inflammatory response, elastic fiber degradation and clinical outcomes. Results: Comparing good and poor disease outcomes of COVID-19 patients, vitamin 25(OH)D levels were not significantly different. IL-6 levels, however, were significantly higher in patients with poor outcome, compared to patients with good outcome (30.3 vs. 153.0 pg/mL; Conclusions: Dp-ucMGP associates with IL-6 as a central component of the destructive inflammatory processes in COVID-19. An intervention trial may provide insight whether vitamin K administration, either or not in combination with vitamin D, improves clinical outcome of COVID-19.
Language	English
Publishing date	2022-01-17
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2776676-7
ISSN	2296-861X
ISSN	2296-861X
DOI	10.3389/fnut.2021.761191
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Article: Corrigendum: Effects of Vitamin D and K on Interleukin-6 in COVID-19.

Visser, Margot P J / Dofferhoff, Anton S M / van den Ouweland, Jody M W / van Daal, Henny / Kramers, Cornelis / Schurgers, Leon J / Janssen, Rob / Walk, Jona

Frontiers in nutrition

2022 Volume 9, Page(s) 868324

Abstract: This corrects the article DOI: 10.3389/fnut.2021.761191.]. ...

Abstract	[This corrects the article DOI: 10.3389/fnut.2021.761191.].
Language	English
Publishing date	2022-03-08
Publishing country	Switzerland
Document type	Published Erratum
ZDB-ID	2776676-7
ISSN	2296-861X
ISSN	2296-861X
DOI	10.3389/fnut.2022.868324
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Article ; Online: The effect of COVID-19 vaccination on anticoagulation stability in adolescents and young adults using vitamin K antagonists.

Visser, Chantal / Yousefi, Arjen / Nierman, Melchior C / Huisman, Menno V / Gulpen, Anouk J W / van Ommen, C Heleen / Kruip, Marieke J H A

Thrombosis research

2023 Volume 228, Page(s) 121–127

Abstract: ... young adults (AYAs) from 12 years onwards. In elderly vitamin K antagonist (VKA) users, COVID-19 vaccination ...

Abstract	Introduction: The European Medicine Agency has authorized COVID-19 vaccination in adolescents and young adults (AYAs) from 12 years onwards. In elderly vitamin K antagonist (VKA) users, COVID-19 vaccination has been associated with an increased risk of supra- and subtherapeutic INRs. Whether this association is also observed in AYAs using VKA is unknown. Our aim was to describe the stability of anticoagulation after COVID-19 vaccination in AYA VKA users. Materials and methods: A case-crossover study was performed in a cohort of AYAs (12-30 years) using VKAs. The most recent INR results before vaccination, the reference period, were compared with the most recent INR after the first and, if applicable, second vaccination. Several sensitivity analyses were performed in which we restricted our analysis to stable patients and patients without interacting events. Results: 101 AYAs were included, with a median age [IQR] of 25 [7] years, of whom 51.5 % were male and 68.3 % used acenocoumarol. We observed a decrease of 20.8 % in INRs within range after the first vaccination, due to an increase of 16.8 % in supratherapeutic INRs. These results were verified in our sensitivity analyses. No differences were observed after the second vaccination compared to before and after the first vaccination. Complications after vaccination occurred less often than before vaccination (9.0 vs 3.0 bleedings) and were non-severe. Conclusions: the stability of anticoagulation after COVID-19 vaccination was decreased in AYA VKA users. However, the decrease might not be clinically relevant as no increase of complications nor significant dose adjustments were observed.
MeSH term(s)	Humans ; Male ; Young Adult ; Adolescent ; Aged ; Adult ; Female ; COVID-19 Vaccines/adverse effects ; Cross-Over Studies ; COVID-19/prevention & control ; Anticoagulants/therapeutic use ; International Normalized Ratio/methods ; Vitamin K
Chemical Substances	COVID-19 Vaccines ; Anticoagulants ; Vitamin K (12001-79-5)
Language	English
Publishing date	2023-06-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	121852-9
ISSN	1879-2472 ; 0049-3848
ISSN (online)	1879-2472
ISSN	0049-3848
DOI	10.1016/j.thromres.2023.06.005
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Article ; Online: The Immediate Effect of COVID-19 Vaccination on Anticoagulation Control in Patients Using Vitamin K Antagonists.

Visser, Chantal / Biedermann, Joseph S / Nierman, Melchior C / van der Meer, Felix J M / Gulpen, Anouk J W / Moors, Yvonne C F / Cannegieter, Suzanne C / Lijfering, Willem M / Kruip, Marieke J H A

Thrombosis and haemostasis

2022 Volume 122, Issue 3, Page(s) 377–385

Abstract: ... vitamin K antagonists (VKAs).: Methods: A case-crossover study was performed in a cohort of outpatient ...

Abstract	Background: In January 2021, the Dutch vaccination program against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was started. Clinical studies have shown that systemic reactions occur in up to 50% of vaccine recipients. Therefore, COVID-19 vaccination could affect anticoagulation control, potentially leading to an increased risk of thrombotic events and bleeding complications. Aims: This article investigates whether the BNT162b2 vaccine affects anticoagulation control in outpatients using vitamin K antagonists (VKAs). Methods: A case-crossover study was performed in a cohort of outpatient VKA users from four Dutch anticoagulation clinics who received a BNT162b2 vaccine. International normalized ratio (INR) results and VKA dosages before the first vaccination, the reference period, were compared with those after the first and second vaccination. Results: A total of 3,148 outpatient VKA users were included, with a mean age (standard deviation) of 86.7 (8.7) years, of whom 43.8% were male, 67.0% used acenocoumarol, and 33.0% phenprocoumon. We observed a decrease of 8.9% of INRs within range in the standard intensity group (target INR 2.0-3.0). There was both an increased risk of supratherapeutic (odds ratio [OR] = 1.34 [95% confidence interval [CI] 1.08-1.67]) and subtherapeutic levels (OR = 1.40 [95% CI 1.08-1.83]) after first vaccination. In the high-intensity group (target INR 2.5-3.5), the risk of a supratherapeutic INR was 2.3 times higher after first vaccination (OR = 2.29 [95% CI 1.22-4.28]) and 3.3 times higher after second vaccination (OR = 3.25 [95% CI 1.06-9.97]). Conclusion: BNT162b2 was associated with an immediate negative effect on anticoagulation control in patients treated with VKAs, so it is advisable to monitor the INR shortly after vaccination, even in stable patients.
MeSH term(s)	Aged ; Aged, 80 and over ; Ambulatory Care ; Anticoagulants/administration & dosage ; BNT162 Vaccine/administration & dosage ; BNT162 Vaccine/adverse effects ; Blood Coagulation/drug effects ; Drug Monitoring ; Female ; Humans ; International Normalized Ratio ; Male ; Netherlands ; Predictive Value of Tests ; Retrospective Studies ; Risk Assessment ; Risk Factors ; Time Factors ; Treatment Outcome ; Vaccination/adverse effects ; Vitamin K/antagonists & inhibitors
Chemical Substances	Anticoagulants ; Vitamin K (12001-79-5) ; BNT162 Vaccine (N38TVC63NU)
Language	English
Publishing date	2022-03-04
Publishing country	Germany
Document type	Journal Article ; Multicenter Study
ZDB-ID	518294-3
ISSN	2567-689X ; 0340-6245
ISSN (online)	2567-689X
ISSN	0340-6245
DOI	10.1055/s-0042-1742628
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Uh III Zs.192: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular ab Jg. 2022: Lesesaal (EG)
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Article ; Online: RLP/K enrichment sequencing; a novel method to identify receptor-like protein (RLP) and receptor-like kinase (RLK) genes.

Lin, Xiao / Armstrong, Miles / Baker, Katie / Wouters, Doret / Visser, Richard G F / Wolters, Pieter J / Hein, Ingo / Vleeshouwers, Vivianne G A A

The New phytologist

2020 Volume 227, Issue 4, Page(s) 1264–1276

Abstract: ... Effectoromics leads to precise identification of plants with target PRRs, and subsequent RLP/K enrichment ...

Abstract	The identification of immune receptors in crop plants is time-consuming but important for disease control. Previously, resistance gene enrichment sequencing (RenSeq) was developed to accelerate mapping of nucleotide-binding domain and leucine-rich repeat containing (NLR) genes. However, resistances mediated by pattern recognition receptors (PRRs) remain less utilized. Here, our pipeline shows accelerated mapping of PRRs. Effectoromics leads to precise identification of plants with target PRRs, and subsequent RLP/K enrichment sequencing (RLP/KSeq) leads to detection of informative single nucleotide polymorphisms that are linked to the trait. Using Phytophthora infestans as a model, we identified Solanum microdontum plants that recognize the apoplastic effectors INF1 or SCR74. RLP/KSeq in a segregating Solanum population confirmed the localization of the INF1 receptor on chromosome 12, and led to the rapid mapping of the response to SCR74 to chromosome 9. By using markers obtained from RLP/KSeq in conjunction with additional markers, we fine-mapped the SCR74 receptor to a 43-kbp G-LecRK locus. Our findings show that RLP/KSeq enables rapid mapping of PRRs and is especially beneficial for crop plants with large and complex genomes. This work will enable the elucidation and characterization of the nonNLR plant immune receptors and ultimately facilitate informed resistance breeding.
MeSH term(s)	Amino Acid Sequence ; Phytophthora infestans ; Plant Breeding ; Plant Diseases/genetics ; Receptors, Pattern Recognition ; Solanum
Chemical Substances	Receptors, Pattern Recognition
Language	English
Publishing date	2020-05-22
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	208885-x
ISSN	1469-8137 ; 0028-646X
ISSN (online)	1469-8137
ISSN	0028-646X
DOI	10.1111/nph.16608
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Book ; Online: Vaststellen habitatkwaliteit i.h.k.v. het agrarisch natuurbeheer

Visser, Tim / Melman, Dick

Ervaringen uit de praktijk

2021

Abstract: De monitoring van het agrarisch richt zich tot dusver met name op het in beeld brengen van de abundantie (aantallen) van de doelsoorten. Het primaire effect van het agrarisch natuurbeheer is evenwel de beïnvloeding van de habitatkwaliteit. Deze ... ...

Abstract	De monitoring van het agrarisch richt zich tot dusver met name op het in beeld brengen van de abundantie (aantallen) van de doelsoorten. Het primaire effect van het agrarisch natuurbeheer is evenwel de beïnvloeding van de habitatkwaliteit. Deze veranderde habitatkwaliteit vertaalt zich op termijn als het goed is in een verandering van de abundantie van de doelsoorten. Om snel zicht te krijgen op de effectiviteit van het beheer is monitoring van de habitatkwaliteit daarom noodzaak. In dit project is een start gemaakt met de ontwikkeling van een systematiek waarmee de habitatkwaliteit kan worden gemonitord, op basis van metingen in het veld en kaartmateriaal. Voor 4 doelsoorten (grutto, ringmus, veldleeuwerik en grote modderkruiper) is een praktijkhandleiding ontwikkeld, die vervolgens is getest in het veld door vrijwilligers en experts. Daarbij is een uiteenlopendeset van habitatkenmerken op gestandaardiseerde wijze gemeten. Uit de evaluatie bleek dat de methodiek goed toepasbaar is en het benodigde kennisniveau voor het uitvoeren van de metingen relatief laag is. De resultaten van de metingen komen op hoofdlijnen goed overeen met het beeld van betrokken deskundigen en vrijwilligers. Verbetermogelijkheden liggen bij 1) de ontwikkeling van een GIStool waarmee overzichten van habitateisen voor een gebied naar keuze kunnen worden gemaakt, 2) verkenning van mogelijkheden voor het gebruik van van remote sensing, bijvoorbeeld voor het inventariseren en classificeren van landschapselementen, 3) het vinden van de juiste (betrouwbaar en toegankelijk) methodiek voor het meten van de insectenstand als voedselbron voor boerenlandvogels en 4) een oplossing voor moeilijk kwantificeerbare habitatkenmerken zoals de ruimtelijke samenhang van verschillende habitatonderdelen. Zodra operationalisering aan de orde komt dient te worden verkend of kan worden aangesloten op de ICT hulpmiddelen die momenteel door de vrijwilligers wordt gebruikt, zodat metingen direct in het veld kunnen worden ingevoerd en gekoppeld aan een beheereenheid.
Keywords	Alauda arvensis ; Limosa limosa ; Misgurnus fossilis ; Passer montanus ; agri-environment schemes ; grassland birds ; habitat management ; habitats ; management units ; monitoring ; nature management ; agrarisch natuurbeheer ; beheerseenheden ; habitatbeheer ; natuurbeheer ; weidevogels
Language	Dutch
Publisher	Wageningen Environmental Research
Publishing country	nl
Document type	Book ; Online
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Article ; Online: Increasing the dose of oral vitamin K prophylaxis and its effect on bleeding risk.

Löwensteyn, Yvette Nicole / Jansen, Nicolaas Johannes Georgius / van Heerde, Marc / Klein, Richard Henryk / Kneyber, Martin Christiaan Jacques / Kuiper, Jan Willem / Riedijk, Maaike Anne / Verlaat, Carin Wilhelmus Maria / Visser, Idse Hendrik Egbert / van Waardenburg, Dirk Adriaan / van Hasselt, Peter Marin

European journal of pediatrics

2019 Volume 178, Issue 7, Page(s) 1033–1042

Abstract: Vitamin K prophylaxis in infancy aims to prevent life-threatening vitamin K deficiency bleeding ... December 2016. Additionally, infants with intracranial vitamin K deficiency bleeding were identified using ... to 154 days (p < 0.001).Conclusion: A sixfold increase in oral vitamin K prophylaxis was associated ...

Abstract	Vitamin K prophylaxis in infancy aims to prevent life-threatening vitamin K deficiency bleeding (VKDB). The Dutch prophylactic oral daily regimen was increased sixfold from 25 to 150 μg because of a high failure rate. To evaluate the efficacy of this new regimen, incidences of intracranial VKDB under both regimens were compared using both general and targeted surveillance. Late VKDB in the general pediatric population was identified by the Netherlands Pediatric Surveillance Unit, between 1 October 2014 and 31 December 2016. Additionally, infants with intracranial vitamin K deficiency bleeding were identified using the Dutch Pediatric Intensive Care Evaluation registry. The incidence of intracranial VKDB as assessed by general and targeted surveillance decreased from 1.6 per 100,000 (95% CI, 0.4-5.1) to 1.3 per 100,000 (95% CI, 0.5-3.2) and from 3.1 per 100,000 live births (95% CI, 1.9-5.0) to 1.2 per 100,000 live births (95% CI, 0.6-2.3), respectively. Median time between consecutive cases in the latter increased from 24 to 154 days (p < 0.001).Conclusion: A sixfold increase in oral vitamin K prophylaxis was associated with a surprisingly modest reduction in the incidence of intracranial VKDB, indicating that factors other than the dose need addressing to improve efficacy. What is Known: • The efficacy of intramuscular vitamin K prophylaxis is threatened by an increasing number of parents opting out. • Oral prophylaxis represents an attractive and less invasive alternative but is inferior, especially in infants with malabsorption of vitamin K due to cholestasis. What is New: • Increasing the daily oral dose of vitamin K sixfold had a surprisingly modest effect on the incidence of late vitamin K deficiency bleeding. • This finding indicates that factors other than the dose must play an important role.
MeSH term(s)	Administration, Oral ; Antifibrinolytic Agents/administration & dosage ; Cross-Sectional Studies ; Dose-Response Relationship, Drug ; Female ; Humans ; Incidence ; Infant ; Infant, Newborn ; Intracranial Hemorrhages/epidemiology ; Intracranial Hemorrhages/etiology ; Intracranial Hemorrhages/prevention & control ; Male ; Netherlands/epidemiology ; Vitamin K/administration & dosage ; Vitamin K Deficiency Bleeding/epidemiology ; Vitamin K Deficiency Bleeding/prevention & control
Chemical Substances	Antifibrinolytic Agents ; Vitamin K (12001-79-5)
Language	English
Publishing date	2019-05-06
Publishing country	Germany
Document type	Journal Article
ZDB-ID	194196-3
ISSN	1432-1076 ; 0340-6199 ; 0943-9676
ISSN (online)	1432-1076
ISSN	0340-6199 ; 0943-9676
DOI	10.1007/s00431-019-03391-y
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Article ; Online: Understanding Motivation to Adhere to Guidelines for Alcohol Intake, Physical Activity, and Fruit and Vegetable Intake Among U.K. University Students.

de Visser, Richard O / Conroy, Dominic / Davies, Emma / Cooke, Richard

Health education & behavior : the official publication of the Society for Public Health Education

2021 Volume 48, Issue 4, Page(s) 480–487

Abstract: ... less likely than older adults to exceed U.K. weekly alcohol intake guidelines or to be inactive ... An online survey was completed by 559 U.K. university students. Key outcome variables were knowledge ... the U.K. guidelines for alcohol intake, PA, and FV intake. However, simply increasing knowledge may not ...

Abstract	Background: To encourage people to lead healthier lifestyles, governments in many countries publish guidelines for alcohol intake, physical activity (PA), and fruit and vegetable (FV) intake. However, there is a need for better understanding of whether people understand such guidelines, consider them useful, and adhere to them. University students are a group worthy of attention because although they are less likely than older adults to exceed U.K. weekly alcohol intake guidelines or to be inactive, they are also less likely to meet FV consumption targets. Furthermore, because behavior during youth predicts adult behavior, it is important to identify influences on healthier behavior. Method: An online survey was completed by 559 U.K. university students. Key outcome variables were knowledge of guidelines, motivation to adhere to them, and adherence to them. Results: A total of 72% adhered to guidelines for alcohol intake, 58% for PA, and 20% for FV intake. Students generally had poor or moderate knowledge of guidelines, perceived them as only moderately useful, and were only moderately motivated to adhere to them. Greater motivation to adhere to guidelines was not significantly related to more accurate knowledge. However, it was related to greater familiarity, and perceiving guidelines as useful and realistic, and greater conscientiousness. Discussion: There is a need to ensure that students understand the U.K. guidelines for alcohol intake, PA, and FV intake. However, simply increasing knowledge may not lead to greater adherence to the guidelines: There is also a need to focus on improving perceptions of how useful and realistic they are.
MeSH term(s)	Adolescent ; Aged ; Alcohol Drinking/prevention & control ; Cross-Sectional Studies ; Diet ; Exercise ; Fruit ; Humans ; Motivation ; Students ; Universities ; Vegetables
Language	English
Publishing date	2021-02-16
Publishing country	United States
Document type	Journal Article
ZDB-ID	1362906-2
ISSN	1552-6127 ; 1090-1981
ISSN (online)	1552-6127
ISSN	1090-1981
DOI	10.1177/1090198120988251
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