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  1. Article ; Online: High dietary K

    Wang, Tong / Liu, Tommy / Xu, Shuhua / Frindt, Gustavo / Weinstein, Alan M / Palmer, Lawrence G

    American journal of physiology. Renal physiology

    2023  Volume 325, Issue 2, Page(s) F224–F234

    Abstract: The impact of chronic dietary K ...

    Abstract The impact of chronic dietary K
    MeSH term(s) Rats ; Animals ; Sodium-Hydrogen Exchanger 3/metabolism ; Kidney Tubules, Proximal/metabolism ; Nephrons/metabolism ; Kidney/metabolism ; Sodium/metabolism ; Glomerular Filtration Rate
    Chemical Substances Sodium-Hydrogen Exchanger 3 ; Sodium (9NEZ333N27)
    Language English
    Publishing date 2023-06-15
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 603837-2
    ISSN 1522-1466 ; 0363-6127
    ISSN (online) 1522-1466
    ISSN 0363-6127
    DOI 10.1152/ajprenal.00013.2023
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Association between vitamin K

    Palmer, Claire R / Bellinge, Jamie W / Dalgaard, Frederik / Sim, Marc / Murray, Kevin / Connolly, Emma / Blekkenhorst, Lauren C / Bondonno, Catherine P / Croft, Kevin D / Gislason, Gunnar / Tjønneland, Anne / Overvad, Kim / Schultz, Carl / Lewis, Joshua R / Hodgson, Jonathan M / Bondonno, Nicola P

    European journal of epidemiology

    2021  Volume 36, Issue 10, Page(s) 1005–1014

    Abstract: Reported associations between vitamin K ...

    Abstract Reported associations between vitamin K
    MeSH term(s) Cardiovascular Diseases/metabolism ; Cardiovascular Diseases/mortality ; Cardiovascular Diseases/prevention & control ; Cause of Death ; Denmark/epidemiology ; Female ; Humans ; Male ; Middle Aged ; Mortality ; Neoplasms/metabolism ; Neoplasms/mortality ; Neoplasms/prevention & control ; Nutrition Assessment ; Prospective Studies ; Risk Factors ; Surveys and Questionnaires ; Vitamin K/administration & dosage ; Vitamin K 1/administration & dosage ; Vitamin K 2/administration & dosage
    Chemical Substances Vitamin K 2 (11032-49-8) ; Vitamin K (12001-79-5) ; Vitamin K 1 (84-80-0)
    Language English
    Publishing date 2021-09-30
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 632614-6
    ISSN 1573-7284 ; 0393-2990
    ISSN (online) 1573-7284
    ISSN 0393-2990
    DOI 10.1007/s10654-021-00806-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Development of a Vitamin K Database for Commercially Available Food in Australia.

    Palmer, Claire R / Koch, Henrietta / Shinde, Sujata / Blekkenhorst, Lauren C / Lewis, Joshua R / Croft, Kevin D / Hodgson, Jonathan M / Sim, Marc

    Frontiers in nutrition

    2021  Volume 8, Page(s) 753059

    Abstract: Vitamin K content of foods is known to vary substantially by geographical location. In Australia ... no Vitamin K database of food exists, thereby creating ambiguity when trying to develop national ... dietary intake guidelines. This investigation aimed to develop a Vitamin K database for commonly consumed ...

    Abstract Vitamin K content of foods is known to vary substantially by geographical location. In Australia, no Vitamin K database of food exists, thereby creating ambiguity when trying to develop national dietary intake guidelines. This investigation aimed to develop a Vitamin K database for commonly consumed foods that are commercially available in Australian supermarkets. The Vitamin K1 (phylloquinone; PK) and K2 (menaquinone; MK4, MK7) content of 60 foods known to contain Vitamin K were assessed (e.g., vegetables fruits, oils, animal products, dairy and fermented foods). A liquid chromatography with tandem mass spectrometry (LCMS/MS) method was developed and used to measure PK and MKs in different foods with an improved chromatographic separation and detection of Vitamin K's and their analogs. The LOD and LOQ for PK and MK4 was 0.1, 0.5 ng/ml and 0.5, 1.0 ng/ml, respectively. The majority foods contained detectable PK (53/60), about half contained MK4 (31/60), and few contained MK7 (3/60). PK was highest in green leafy vegetables, with moderate amounts in oils. Highest MK4 content was in chicken eggs and meat products such as ham and chicken. This database enables nutritional epidemiologist to estimate dietary Vitamin K intake, especially in Australian cohorts, for a range of health outcomes.
    Language English
    Publishing date 2021-12-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2776676-7
    ISSN 2296-861X
    ISSN 2296-861X
    DOI 10.3389/fnut.2021.753059
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: ENaC and ROMK channels in the connecting tubule regulate renal K+ secretion.

    Yang, Lei / Xu, Yuanyuan / Gravotta, Diego / Frindt, Gustavo / Weinstein, Alan M / Palmer, Lawrence G

    The Journal of general physiology

    2021  Volume 153, Issue 8

    Abstract: ... conditions. Under basal dietary conditions (0.5% K), ENaC activity, measured as amiloride-sensitive currents ... much of the urinary K+ required for K balance on this diet. In animals fed a K-deficient diet (0.1% K ... In animals fed a diet supplemented with 3% K, ENaC currents increased modestly in the CNTe but strongly ...

    Abstract We measured the activities of epithelial Na channels (ENaC) and ROMK channels in the distal nephron of the mouse kidney and assessed their role in the process of K+ secretion under different physiological conditions. Under basal dietary conditions (0.5% K), ENaC activity, measured as amiloride-sensitive currents, was high in cells at the distal end of the distal convoluted tubule (DCT) and proximal end of the connecting tubule (CNT), a region we call the early CNT (CNTe). In more distal parts of the CNT (aldosterone-sensitive portion [CNTas]), these currents were minimal. This functional difference correlated with alterations in the intracellular location of ENaC, which was at or near the apical membrane in CNTe and more cytoplasmic in the CNTas. ROMK activity, measured as TPNQ-sensitive currents, was substantial in both segments. A mathematical model of the rat nephron suggested that K+ secretion by the CNTe predicted from these currents provides much of the urinary K+ required for K balance on this diet. In animals fed a K-deficient diet (0.1% K), both ENaC and ROMK currents in the CNTe decreased by ∼50%, predicting a 50% decline in K+ secretion. Enhanced reabsorption by a separate mechanism is required to avoid excessive urinary K+ losses. In animals fed a diet supplemented with 3% K, ENaC currents increased modestly in the CNTe but strongly in the CNTas, while ROMK currents tripled in both segments. The enhanced secretion of K+ by the CNTe and the recruitment of secretion by the CNTas account for the additional transport required for K balance. Therefore, adaptation to increased K+ intake involves the extension of robust K+ secretion to more distal parts of the nephron.
    MeSH term(s) Animals ; Epithelial Sodium Channels ; Kidney Tubules, Distal/metabolism ; Mice ; Nephrons/metabolism ; Potassium Channels, Inwardly Rectifying ; Rats ; Sodium/metabolism
    Chemical Substances Epithelial Sodium Channels ; Potassium Channels, Inwardly Rectifying ; Sodium (9NEZ333N27)
    Language English
    Publishing date 2021-06-18
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 3118-5
    ISSN 1540-7748 ; 0022-1295
    ISSN (online) 1540-7748
    ISSN 0022-1295
    DOI 10.1085/jgp.202112902
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Clinical Performance of Triage Strategies for Hr-HPV-Positive Women; A Longitudinal Evaluation of Cytology, p16/K-67 Dual Stain Cytology, and HPV16/18 Genotyping.

    Stanczuk, Grazyna / Currie, Heather / Forson, William / Baxter, Gwendoline / Lawrence, James / Wilson, Allan / Palmer, Timothy / Arbyn, Marc / Cuschieri, Kate

    Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology

    2022  Volume 31, Issue 7, Page(s) 1492–1498

    Abstract: Background: We evaluated the longitudinal performance of three options: HPV16/18 genotyping (HPV16/18), cytology (LBC), and p16/Ki-67 dual stain cytology (DS) for the triage of high-risk Human Papillomavirus-positive (Hr-HPV+) women within the cervical ... ...

    Abstract Background: We evaluated the longitudinal performance of three options: HPV16/18 genotyping (HPV16/18), cytology (LBC), and p16/Ki-67 dual stain cytology (DS) for the triage of high-risk Human Papillomavirus-positive (Hr-HPV+) women within the cervical screening program in Scotland.
    Methods: Data were derived from a cohort of Hr-HPV+ women (n = 385) who participated in PaVDaG (Papillomavirus Dumfries and Galloway) study. Performance of triage strategies for detecting high-grade disease was assessed at 3 (in women <50 years) or 5 years (in women >50 years). Sensitivity, specificity, PPV, and cNPV of each triage test were calculated for CIN2+ and CIN3+ when used singly or sequentially.
    Results: The sensitivity of LBC (≥ borderline), DS, and HPV 16/18 genotyping for the detection of CIN2+ was 62.7% (50.7-73.3), 77.7% (63.1-83.7), and 62.7% (50.7-73.3) with corresponding cNPVs of 10.9%, 8.4%, and 11.9%. The option with the highest sensitivity and lowest cNPV was HPV 16/18 genotyping followed by LBC of Hr-HPV other+ and then DS of the LBC negatives. This yielded sensitivity of 94.7% (86.2-98.3) and cNPV 2.7% for CIN2+. Triage performance was similar if women had tested Hr-HPV+ positive by vaginal self-sampling.
    Conclusions: Two-step triage with HPV 16/18 genotyping before LBC (or DS) for Hr-HPV other+ women was associated with a lower risk of significant disease at follow-up compared with single triage approaches.
    Impact: This study provides longitudinal performance data on triage strategies in Hr-HPV+ women and will be informative for the evolution of cervical screening programs that increasingly rely on molecular technologies.
    MeSH term(s) Cervical Intraepithelial Neoplasia/diagnosis ; Cervical Intraepithelial Neoplasia/genetics ; Coloring Agents ; Colposcopy ; Early Detection of Cancer ; Female ; Genotype ; Human papillomavirus 16/genetics ; Human papillomavirus 18/genetics ; Humans ; Ki-67 Antigen/analysis ; Papillomavirus Infections/complications ; Papillomavirus Infections/diagnosis ; Papillomavirus Infections/genetics ; Pregnancy ; Triage ; Uterine Cervical Neoplasms
    Chemical Substances Coloring Agents ; Ki-67 Antigen
    Language English
    Publishing date 2022-05-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1153420-5
    ISSN 1538-7755 ; 1055-9965
    ISSN (online) 1538-7755
    ISSN 1055-9965
    DOI 10.1158/1055-9965.EPI-21-1425
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Quantifying dietary vitamin K and its link to cardiovascular health: a narrative review.

    Palmer, Claire R / Blekkenhorst, Lauren C / Lewis, Joshua R / Ward, Natalie C / Schultz, Carl J / Hodgson, Jonathan M / Croft, Kevin D / Sim, Marc

    Food & function

    2020  Volume 11, Issue 4, Page(s) 2826–2837

    Abstract: ... a link between vitamin K insufficiency and deficiency with vascular calcification, a marker of advanced ... atherosclerosis. Vitamin K refers to a group of fat-soluble vitamins important for blood coagulation, reducing ... in promoting cardiovascular health. Presently, there is a lack of a comprehensive vitamin K database ...

    Abstract Cardiovascular disease is the leading cause of death and disability worldwide. Recent work suggests a link between vitamin K insufficiency and deficiency with vascular calcification, a marker of advanced atherosclerosis. Vitamin K refers to a group of fat-soluble vitamins important for blood coagulation, reducing inflammation, regulating blood calcium metabolism, as well as bone metabolism, all of which may play a role in promoting cardiovascular health. Presently, there is a lack of a comprehensive vitamin K database on individual foods, which are required to accurately calculate vitamin K1 and K2 intake for examination in epidemiological studies. This has likely contributed to ambiguity regarding the recommended daily intake of vitamin K, including whether vitamin K1 and K2 may have separate, partly overlapping functions. This review will discuss the presence of: (i) vitamin K1 and K2 in the diet; (ii) the methods of quantitating vitamin K compounds in foods; and (iii) provide an overview of the evidence for the cardiovascular health benefits of vitamin K in observational and clinical trials.
    MeSH term(s) Cardiovascular Diseases/drug therapy ; Dietary Supplements ; Functional Food ; Humans ; Recommended Dietary Allowances ; Vitamin K/administration & dosage
    Chemical Substances Vitamin K (12001-79-5)
    Language English
    Publishing date 2020-03-06
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2612033-1
    ISSN 2042-650X ; 2042-6496
    ISSN (online) 2042-650X
    ISSN 2042-6496
    DOI 10.1039/c9fo02321f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Regulation of renal Na transporters in response to dietary K.

    Yang, Lei / Xu, Shuhua / Guo, Xiaoyun / Uchida, Shinichi / Weinstein, Alan M / Wang, Tong / Palmer, Lawrence G

    American journal of physiology. Renal physiology

    2018  Volume 315, Issue 4, Page(s) F1032–F1041

    Abstract: ... with increased dietary K intake for 1 wk. The epithelial Na channel (ENaC) was upregulated, with enhanced ... The expression of the phosphorylated form of the Na-K-2Cl cotransporter NKCC2 also decreased, despite an increase ...

    Abstract Changes in the expression of Na transport proteins were measured in the kidneys of mice with increased dietary K intake for 1 wk. The epithelial Na channel (ENaC) was upregulated, with enhanced expression of full-length and cleaved forms of α-ENaC and cleaved γ-ENaC. At the same time, the amount of the NaCl cotransporter NCC and its phosphorylated form decreased by ~50% and ~80%, respectively. The expression of the phosphorylated form of the Na-K-2Cl cotransporter NKCC2 also decreased, despite an increase in overall protein content. The effect was stronger in males (80%) than in females (40%). This implies that less Na
    MeSH term(s) Animals ; Biological Transport/physiology ; Carrier Proteins/metabolism ; Epithelial Sodium Channels/metabolism ; Kidney Tubules, Distal/metabolism ; Kidney Tubules, Proximal/metabolism ; Membrane Transport Proteins/metabolism ; Mice ; Nephrons/metabolism ; Sodium/metabolism ; Sodium-Hydrogen Exchangers/metabolism ; Sodium-Potassium-Chloride Symporters/metabolism ; Solute Carrier Family 12, Member 1/metabolism ; Solute Carrier Family 12, Member 3/metabolism
    Chemical Substances Carrier Proteins ; Epithelial Sodium Channels ; Membrane Transport Proteins ; Sodium-Hydrogen Exchangers ; Sodium-Potassium-Chloride Symporters ; Solute Carrier Family 12, Member 1 ; Solute Carrier Family 12, Member 3 ; Sodium (9NEZ333N27)
    Language English
    Publishing date 2018-06-20
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 603837-2
    ISSN 1522-1466 ; 0363-6127
    ISSN (online) 1522-1466
    ISSN 0363-6127
    DOI 10.1152/ajprenal.00117.2018
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: The effects of vitamin K-rich green leafy vegetables on bone metabolism: A 4-week randomised controlled trial in middle-aged and older individuals.

    Sim, Marc / Lewis, Joshua R / Prince, Richard L / Levinger, Itamar / Brennan-Speranza, Tara C / Palmer, Claire / Bondonno, Catherine P / Bondonno, Nicola P / Devine, Amanda / Ward, Natalie C / Byrnes, Elizabeth / Schultz, Carl J / Woodman, Richard / Croft, Kevin / Hodgson, Jonathan M / Blekkenhorst, Lauren C

    Bone reports

    2020  Volume 12, Page(s) 100274

    Abstract: ... i) increased dietary vitamin K1 by consuming green leafy vegetables (H-K; ~200 g/d containing 164.3 [99.5-384.7 ... μg/d of vitamin K1); (ii) low vitamin K1 by consuming vitamin K1-poor vegetables (L-K; ~200 g/d ...

    Abstract Background: High vegetable intake is associated with beneficial effects on bone. However, the mechanisms remain uncertain. Green leafy vegetables are a rich source of vitamin K1, which is known to have large effects on osteoblasts and osteocalcin (OC) metabolism.
    Objective: To examine the effects of consumption of two to three extra serves of green leafy vegetables daily on bone metabolism.
    Methods: Thirty individuals (mean age 61.8 ± 9.9 years, 67% male) completed three experimental phases in a randomised controlled crossover design, each lasting four weeks, with a washout period of four weeks between phases (clinical trial registration: ACTRN12615000194561). The three experimental phases were: (i) increased dietary vitamin K1 by consuming green leafy vegetables (H-K; ~200 g/d containing 164.3 [99.5-384.7] μg/d of vitamin K1); (ii) low vitamin K1 by consuming vitamin K1-poor vegetables (L-K; ~200 g/d containing 9.4 [7.7-11.6] μg/d of vitamin K1); and (iii) control (CON) where participants consumed an energy-matched non-vegetable control. OC forms, total OC (tOC), carboxylated OC (cOC) and undercarboxylated OC (ucOC), were measured in serum pre- and post-intervention for each experimental phase using a sandwich-electrochemiluminescence immunoassay.
    Results: Pre-intervention tOC, ucOC and ucOC:tOC levels were similar between phases (
    Conclusions: In middle-aged healthy men and women, an easily achieved increase in dietary intake of vitamin K1-rich green leafy vegetables substantially reduces serum tOC and ucOC suggesting increased entry of OC into bone matrix, where it may improve the material property of bone. In conjunction with previous epidemiological and randomised controlled trial data, these findings suggest that interventions to increase vegetable intake over extended periods should include bone end points including fracture risk.
    Language English
    Publishing date 2020-04-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2821774-3
    ISSN 2352-1872
    ISSN 2352-1872
    DOI 10.1016/j.bonr.2020.100274
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  9. Article: Picture This: Management of Canine Pyotraumatic Dermatitis (a.k.a., Hot Spot).

    Palmer, Lee E

    Journal of special operations medicine : a peer reviewed journal for SOF medical professionals

    2018  Volume 18, Issue 2, Page(s) 105–109

    Abstract: Pyotraumatic dermatitis (a.k.a., hot spot) is a rapidly developing, superficial, moist, exudative ...

    Abstract Pyotraumatic dermatitis (a.k.a., hot spot) is a rapidly developing, superficial, moist, exudative dermatitis commonly induced by self-inflicted trauma. Although not acutely life threatening, these lesions are extremely pruritic and distracting and significantly interfere with the canine's operational effectiveness and ability to stay on task. The review discusses a case, including clinical presentation, diagnosis, treatment, and prognosis.
    MeSH term(s) Animals ; Dermatitis/diagnosis ; Dermatitis/pathology ; Dermatitis/therapy ; Dermatitis/veterinary ; Dogs ; Military Medicine ; Military Personnel ; Skin/injuries ; Skin/pathology ; Veterinary Medicine
    Language English
    Publishing date 2018-07-02
    Publishing country United States
    Document type Case Reports ; Journal Article ; Review
    ZDB-ID 3006517-3
    ISSN 1553-9768
    ISSN 1553-9768
    DOI 10.55460/XCG6-N1DJ
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  10. Article ; Online: Sex difference in kidney electrolyte transport II: impact of K

    Li, Jing / Xu, Shuhua / Yang, Lei / Yang, Janey / Wang, Claire J / Weinstein, Alan M / Palmer, Lawrence G / Wang, Tong

    American journal of physiology. Renal physiology

    2019  Volume 317, Issue 4, Page(s) F967–F977

    Abstract: We studied sex differences in response to high K ...

    Abstract We studied sex differences in response to high K
    MeSH term(s) Animals ; Cations/urine ; Diuretics/pharmacology ; Electron Transport Complex II/metabolism ; Female ; Glomerular Filtration Rate ; Hydrochlorothiazide/pharmacology ; Kidney/metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Potassium/pharmacology ; Potassium/urine ; Receptor, Angiotensin, Type 1/genetics ; Receptor, Angiotensin, Type 1/metabolism ; Sex Characteristics ; Sodium-Hydrogen Exchanger 3/metabolism ; Sodium-Potassium-Chloride Symporters/metabolism ; Urodynamics
    Chemical Substances Cations ; Diuretics ; Receptor, Angiotensin, Type 1 ; Slc9a3 protein, mouse ; Sodium-Hydrogen Exchanger 3 ; Sodium-Potassium-Chloride Symporters ; Hydrochlorothiazide (0J48LPH2TH) ; Electron Transport Complex II (EC 1.3.5.1) ; Potassium (RWP5GA015D)
    Language English
    Publishing date 2019-08-07
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 603837-2
    ISSN 1522-1466 ; 0363-6127
    ISSN (online) 1522-1466
    ISSN 0363-6127
    DOI 10.1152/ajprenal.00125.2019
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