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Lu Q, Wang Z, Zhang S, Wang J, Mao X, Xie L, Liu Q, Zeng H. Molecular interaction mechanism for humic acids fouling resistance on charged, zwitterion-like and zwitterionic surfaces. J Colloid Interface Sci 2024; 666:393-402. [PMID: 38603881 DOI: 10.1016/j.jcis.2024.04.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/27/2024] [Accepted: 04/05/2024] [Indexed: 04/13/2024]
Abstract
Humic acids (HA) are ubiquitous in surface waters, leading to significant fouling challenges. While zwitterion-like and zwitterionic surfaces have emerged as promising candidates for antifouling, a quantitative understanding of molecular interaction mechanism, particularly at the nanoscale, still remains elusive. In this work, the intermolecular forces between HA and charged, zwitterion-like or zwitterionic monolayers in aqueous environments were quantified using atomic force microscope. Compared to cationic MTAC ([2-(methacryloyloxy)ethyl]trimethylammonium chloride), which exhibited an adhesion energy of ∼1.342 mJ/m2 with HA due to the synergistic effect of electrostatic attraction and possible cation-π interaction, anionic SPMA (3-sulfopropyl methacrylate) showed a weaker adhesion energy (∼0.258 mJ/m2) attributed to the electrostatic repulsion. Zwitterion-like MTAC/SPMA mixture, driven by electrostatic attraction between opposite charges, formed a hydration layer that prevented the interaction with HA, thereby considerably reducing adhesion energy to ∼0.123 mJ/m2. In contrast, zwitterionic MPC (2-methacryloyloxyethyl phosphorylcholine) and DMAPS ([2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl) ammonium hydroxide) displayed ultralow adhesion energy (0.06-0.07 mJ/m2) with HA, arising from their strong dipole moments which could induce a tight hydration layer that effectively inhibited HA fouling. The pH-mediated electrostatic interaction resulted in the increased adhesion energy for MTAC but decreased adhesion energy for SPMA with elevated pH, while the adhesion energy for zwitterion-like and zwitterionic surfaces was independent of environmental pH. Density functional theory (DFT) simulation confirmed the strong binding capability of MPC and DMAPS with water molecules (∼-12 kcal mol-1). This work provides valuable insights into the molecular interaction mechanisms underlying humic-substance-fouling resistance of charged, zwitterion-like and zwitterionic materials at the nanoscale, shedding light on developing more effective strategy for HA antifouling in water treatment.
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Affiliation(s)
- Qiuyi Lu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Zhoujie Wang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, PR China
| | - Shishuang Zhang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, PR China
| | - Jingyi Wang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Xiaohui Mao
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Lei Xie
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, PR China.
| | - Qi Liu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
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Tam EA, Robb FE, Champagne AM. Lipids in the American Alligator stratum corneum provide insights into the evolution of vertebrate skin. Comp Biochem Physiol A Mol Integr Physiol 2024; 292:111620. [PMID: 38452971 DOI: 10.1016/j.cbpa.2024.111620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 03/02/2024] [Accepted: 03/04/2024] [Indexed: 03/09/2024]
Abstract
In terrestrial vertebrates, the outermost layer of the skin, the stratum corneum (SC), provides a durable and flexible interface with the environment and is comprised of corneocytes embedded in lipids. However, the morphology and lipid composition of the SC varies throughout evolutionary history. Because crocodilians and birds phylogenetically bracket the Archosaurian clade, lipid composition in crocodilian SC may be compared with that of birds and other vertebrates to make inferences about broader phylogenetic patterns within Archosaurs while highlighting adaptations in vertebrate skin. We identified and quantified lipid classes in the SC of the American Alligator (Alligator mississippiensis) from three skin regions varying in mobility. Our results find similarities in lipid composition between alligator and avian SC, including a high percentage of cerebrosides, a polar lipid previously found only in the SC of birds and bats. Furthermore, polar lipids were more abundant in the most mobile region of the SC. Because polar lipids bind with water to increase skin hydration and therefore its pliability under physical stress, we hypothesize that selection for lipids in Archosaurian SC was driven by the unique distribution of proteins in the SC of this clade, and cerebrosides may have served as pre-adaptations for flight.
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Affiliation(s)
- Elissa A Tam
- Biology Department, University of Southern Indiana, Evansville, IN 47712, USA
| | - Frank E Robb
- Environmental Education Awareness Research Support and Services, Sharpes, FL 32959, USA
| | - Alex M Champagne
- Biology Department, University of Southern Indiana, Evansville, IN 47712, USA.
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Yu N, Bello IT, Chen X, Liu T, Li Z, Song Y, Ni M. Rational Design of Ruddlesden-Popper Perovskite Ferrites as Air Electrode for Highly Active and Durable Reversible Protonic Ceramic Cells. Nanomicro Lett 2024; 16:177. [PMID: 38647738 PMCID: PMC11035539 DOI: 10.1007/s40820-024-01397-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 03/16/2024] [Indexed: 04/25/2024]
Abstract
Reversible protonic ceramic cells (RePCCs) hold promise for efficient energy storage, but their practicality is hindered by a lack of high-performance air electrode materials. Ruddlesden-Popper perovskite Sr3Fe2O7-δ (SF) exhibits superior proton uptake and rapid ionic conduction, boosting activity. However, excessive proton uptake during RePCC operation degrades SF's crystal structure, impacting durability. This study introduces a novel A/B-sites co-substitution strategy for modifying air electrodes, incorporating Sr-deficiency and Nb-substitution to create Sr2.8Fe1.8Nb0.2O7-δ (D-SFN). Nb stabilizes SF's crystal, curbing excessive phase formation, and Sr-deficiency boosts oxygen vacancy concentration, optimizing oxygen transport. The D-SFN electrode demonstrates outstanding activity and durability, achieving a peak power density of 596 mW cm-2 in fuel cell mode and a current density of - 1.19 A cm-2 in electrolysis mode at 1.3 V, 650 °C, with excellent cycling durability. This approach holds the potential for advancing robust and efficient air electrodes in RePCCs for renewable energy storage.
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Affiliation(s)
- Na Yu
- Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Idris Temitope Bello
- Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Xi Chen
- Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Tong Liu
- Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, Guangdong, People's Republic of China
| | - Zheng Li
- Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China
| | - Yufei Song
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People's Republic of China.
| | - Meng Ni
- Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD) and Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China.
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Sessions J, Marsden J, Bringloe L, Gilsenan I. Changing the culture around hospital-based nutrition. Br J Nurs 2024; 33:S18-S25. [PMID: 38639746 DOI: 10.12968/bjon.2024.33.8.s18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Following a serious incident and inquest after the death of a patient due to choking at Sheffield Teaching Hospitals NHS Foundation Trust, the Trust put in place an action plan and implemented strategies to reduce the risk of recurrence. Four key actions were identified as essential to try to reduce the risk of a similar event: introduction of a standard operating procedure for mealtimes that included a pre-meal safety 'pause'; use of an electronic communication icon to indicate modified diet/fluid requirements, from emergency department and onward as a patient is transferred; job-specific mealtime safety training; and use of bedside posters with specific dietary requirements (in line with the International Dysphagia Diet Standards Initiative Framework). A new role of Lead Educator for Nutrition was introduced to support the changes and provide training. Changes were also made to the incident reporting system to ensure easy identification of events relating to dysphagia, so that these could be monitored, themes identified and lessons shared. A series of audits following the changes have shown that more staff across disciplines and teams have accessed training on nutrition and hydration practices, wards have increased the use of the icon and posters, and successfully implemented pre-meal safety pauses. The Lead Educator for Nutrition has helped embed learning, and increased awareness and knowledge about nutrition and hydration.
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Affiliation(s)
- Jo Sessions
- Lead Educator for Nutrition, Central Nursing, Sheffield Teaching Hospitals NHS Foundation Trust
| | - Jo Marsden
- Nurse Director, Surgical Services, Sheffield Teaching Hospitals NHS Foundation Trust
| | - Louise Bringloe
- Lead Nurse for Quality and Practice Development, Central Nursing, Sheffield Teaching Hospitals NHS Foundation Trust
| | - Irene Gilsenan
- Practice Development Co-ordinator (Evidence Based Practice) Learning, Education and Development Department, Sheffield Teaching Hospitals NHS Foundation Trust
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Mingo V, Foudoulakis M, Wheeler JR. Mechanistic modelling of amphibian body burdens after dermal uptake of pesticides from soil. Environ Pollut 2024; 346:123614. [PMID: 38387548 DOI: 10.1016/j.envpol.2024.123614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/08/2024] [Accepted: 02/18/2024] [Indexed: 02/24/2024]
Abstract
Amphibians are currently considered to be covered by pesticide Environmental Risk Assessment schemes by surrogacy assumptions of exposure and susceptibility based on typical laboratory test species such as fish, mammals, and birds. While multiple reviews have shown for this approach to be adequate in the case of aquatic stages, the same cannot be definitively stated for terrestrial stages. Concerns have risen that exposure of amphibians is likely to be highly influenced by dermal absorption, primarily due to the high permeability of their skin and the lack of a protective layer, such as fur or feathers. It is thus hypothesized that dermal uptake could be a significant route of exposure. Consequently, it is necessary to determine the relative importance of different exposure routes that might affect the integrated toxicity outcome for terrestrial amphibian life-stages. Here, a one-compartment Toxicokinetic model was derived and tested using a publicly available dataset containing relevant exposure and uptake information for juvenile anurans exposed to 13 different pesticides. Modelled body burdens were then compared to measured burdens for a total of 815 individuals. Overall, a good concordance between modelled and measured values was observed, with the predicted and measured body burdens differing by a factor of 2 on average (overall R2 of 0.80 and correlation coefficient of 0.89), suggesting good predictivity of the model. Accordingly, the model predicts realistic body burdens for a variety of frog and toad species, and overall, for anurans. As the model includes rehydration (implicit in the evaluated studies) but currently does not account for metabolism, it can be seen as a worst-case assessment. We suggest toxicokinetic models, such as the one here presented, could be used to characterize dermal exposure in amphibians, screen for pesticides of concern, and prioritize risk assessment efforts, whilst reducing the need for de novo vertebrate testing.
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Affiliation(s)
| | | | - James R Wheeler
- Corteva Agriscience, Bergen op Zoom, North Brabant, the Netherlands
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Deymier AC, Deymier PA. Open-system force-elongation relationship of collagen in chemo-mechanical equilibrium with water. J Mech Behav Biomed Mater 2024; 152:106464. [PMID: 38367533 DOI: 10.1016/j.jmbbm.2024.106464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 02/07/2024] [Accepted: 02/13/2024] [Indexed: 02/19/2024]
Abstract
A significant deformation mechanism of collagen at low loads is molecular uncoiling and rearrangement. Although the effect of hydration and cross-linking has been investigated at larger loads when collagen undergoes molecular sliding, their effects on collagen molecular reorganization remain unclear. Here we develop two thermodynamic models that use the notion of open-system elasticity to elucidate the effect of swelling due to water uptake during deformation of collagen networks under low and high cross-linking conditions. With low crosslinking, entropic contributions dominate resulting in rejection of solvent from the polymer network leading to reduced collagen stiffness with increased loads. Contrarily, high cross-linking inhibits initial coiling and structural kinking and the mechanical behavior is dominated by elastic energy. In this configuration, the solvent content depends on the sign of the applied load resulting in a non-linear open-system stress-strain relationship. The models provide insight on the parameters that impact the stress-strain relationships of hydrated collagen and can inform the way collagenous matrices are treated both in medical and laboratory settings.
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Affiliation(s)
- A C Deymier
- Department of Biomedical Engineering, UConn Health, Farmington, CT, USA.
| | - P A Deymier
- Department of Materials Science and Engineering, University of Arizona, Tucson, AZ, 85721, USA
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Huygen L, Thys PM, Wollenberg A, Gutermuth J, Krohn IK. Skin Barrier Function Assessment: Electrical Impedance Spectroscopy Is Less Influenced by Daily Routine Activities Than Transepidermal Water Loss. Ann Dermatol 2024; 36:99-111. [PMID: 38576248 PMCID: PMC10995614 DOI: 10.5021/ad.23.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/27/2023] [Accepted: 11/21/2023] [Indexed: 04/06/2024] Open
Abstract
BACKGROUND Skin barrier function assessment is commonly done by measuring transepidermal water loss (TEWL). An important limitation of this method is the influence of intrinsic and extrinsic factors. Electrical impedance spectroscopy (EIS) is a lesser-established method for skin barrier function assessment. Some influential factors have been described, but no guidelines exist regarding the standardization of these measurements. OBJECTIVE To evaluate the effect size of daily routine activities on TEWL and EIS, as well as their correlation with age and anatomical differences. METHODS Healthy participants (n=31) were stratified into three age groups (18-29, 30-49, and ≥50 years). In a climate-controlled room, EIS and TEWL measurements were performed on the left and right volar forearm and abdomen. RESULTS Body cream application decreased TEWL and EIS values after 15 and 90 minutes. Skin washing decreased TEWL for 15 minutes and EIS values for at least 90 minutes. TEWL was increased 5 minutes after moderate to intense exercise. Coffee intake increased TEWL on the abdomen after 60 minutes. TEWL and EIS values did not correlate with participants' age and no anatomical differences were observed. No correlation was observed between TEWL and EIS. CONCLUSION Body cream application and skin washing should be avoided at least 90 minutes prior to measurements of TEWL and EIS. Exercise and coffee intake should also be avoided prior to TEWL measurements. EIS may be a promising tool for skin barrier function assessment as it is less affected by daily routine activities than TEWL.
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Affiliation(s)
- Lisa Huygen
- Vrije Universiteit Brussel (VUB), Skin Immunology & Immune Tolerance (SKIN) Research Group, Brussels, Belgium
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Department of Dermatology, Brussels, Belgium.
| | - Pauline Marie Thys
- Vrije Universiteit Brussel (VUB), Skin Immunology & Immune Tolerance (SKIN) Research Group, Brussels, Belgium
| | - Andreas Wollenberg
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Department of Dermatology, Brussels, Belgium
- Department of Dermatology and Allergy, Ludwig-Maximilian-University, Munich, Germany
- Department of Dermatology and Allergy, University Hospital Augsburg, Augsburg, Germany
| | - Jan Gutermuth
- Vrije Universiteit Brussel (VUB), Skin Immunology & Immune Tolerance (SKIN) Research Group, Brussels, Belgium
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Department of Dermatology, Brussels, Belgium
| | - Inge Kortekaas Krohn
- Vrije Universiteit Brussel (VUB), Skin Immunology & Immune Tolerance (SKIN) Research Group, Brussels, Belgium
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Department of Dermatology, Brussels, Belgium
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Zhu J, Wang Z, Guan X, Shah SP, Liu H, Yang H, Zhang W. Study on activation of fluorogypsum by sodium sulfate and sodium nitrite. Sci Total Environ 2024; 925:171794. [PMID: 38508247 DOI: 10.1016/j.scitotenv.2024.171794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 02/17/2024] [Accepted: 03/16/2024] [Indexed: 03/22/2024]
Abstract
Given the issues related to poor hydration activity, long setting time and low early strength of industrial by-product fluorogypsum (FG), the composite modifiers (Na2SO4 and NaNO2) were utilized to enhance its reactivity. The investigation of the mechanism involved the utilization of contemporary analytical methods, including X-ray diffraction (XRD), 1H low-field nuclear magnetic resonance (NMR), and Scanning electron microscope and Energy Dispersive Spectrometer (SEM-EDS). The results demonstrated that the incorporation of modifiers significantly enhanced both the hydration rate and activity of fluorogypsum. The optimum concentration of the composite modifier was found to be 1.5 wt% Na2SO4 and 0.5 wt% NaNO2. The addition of modifiers (1.5 wt% Na2SO4 and 0.5 wt% NaNO2) significantly shortens the setting time of FG paste, reducing it by approximately 500 min compared to the control sample. After 28 days of curing, the flexural strength and compressive strength of the fluorogypsum sample containing modifiers (1.5 wt% Na2SO4 and 0.5 wt% NaNO2) increased by 55.5 % (reaching 4.2 MPa) and 31.5 % (reaching 37.6 MPa), respectively. The modifiers facilitate the transformation from anhydrite (CaSO4, AH) to dihydrate gypsum (CaSO4·2H2O, DH). Both NaNO2 and Na2SO4 alter the growth rates of different crystal axes during DH crystal growth, transforming them into prismatic and needle-shaped DH. The prismatic and needle-shaped DH crystals were arranged in layers, resulting in a compact structure with low hole content and few pores, which led to increased density of the hardened paste and higher strength. The current study provides evidence that the inclusion of composite modifiers greatly improves the activity of FG, making it more efficient in the field of building materials.
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Affiliation(s)
- Jianping Zhu
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Zuolin Wang
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Xuemao Guan
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Surendra P Shah
- Center for Advanced Construction Materials, The University of Texas at Arlington, Arlington, TX 76019, United States
| | - Haixia Liu
- Do-Fluoride New Materials Co., Ltd, Jiaozuo 454000, China
| | - Huachun Yang
- Do-Fluoride New Materials Co., Ltd, Jiaozuo 454000, China
| | - Wenyan Zhang
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China.
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Brown HA, Clark B, Périard JD. Reliability and validity of the MX3 portable sweat sodium analyser during exercise in warm conditions. Eur J Appl Physiol 2024:10.1007/s00421-024-05447-w. [PMID: 38430262 DOI: 10.1007/s00421-024-05447-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 02/10/2024] [Indexed: 03/03/2024]
Abstract
PURPOSE Accurately measuring sweat sodium concentration ([Na+]) in the field is advantageous for coaches, scientists, and dieticians looking to tailor hydration strategies. The MX3 hydration testing system is a new portable analyser that uses pre-calibrated biosensors to measure sweat [Na+]. This study aimed to assess the validity and reliability of the MX3 hydration testing system. METHODS Thirty-one (11 females) recreationally active participants completed one experimental trial. During this trial, participants exercised at a self-selected pace for 45 min in a warm environment (31.5 ± 0.8 °C, 63.2 ± 1.3% relative humidity). Sweat samples were collected from three measurement sites using absorbent patches. The samples were then analysed for sweat [Na+] using both the MX3 hydration testing system and the Horiba LAQUAtwin-NA-11. The reliability of the MX3 hydration testing system was determined following two measurements of the same sweat sample. RESULTS The mean difference between measurements was 0.1 mmoL·L-1 (95% limits of agreement (LoA): - 9.2, 9.4). The analyser demonstrated a coefficient of variation (CV) of 5.6% and the standard error of measurement was 3.3 mmoL·L-1. When compared to the Horiba LAQUAtwin-NA-11, there was a mean difference of - 1.7 mmoL·L-1 (95% LoA: - 0.25 X ¯ , 0.25 X ¯ ) and the CV was 9.8%. CONCLUSION The MX3 hydration testing system demonstrated very good single-trial reliability, moderate agreement and a very good CV relative to the Horiba LAQUAtwin-Na-11. To further validate its performance, the MX3 hydration testing system should be compared with analytical techniques known for superior reliability and validity.
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Affiliation(s)
- Harry A Brown
- Research Institute for Sport and Exercise Science (UCRISE), University of Canberra, Bruce, Canberra, ACT, Australia
| | - Brad Clark
- Research Institute for Sport and Exercise Science (UCRISE), University of Canberra, Bruce, Canberra, ACT, Australia
| | - Julien D Périard
- Research Institute for Sport and Exercise Science (UCRISE), University of Canberra, Bruce, Canberra, ACT, Australia.
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Sanson G, Doriguzzi L, Garbari P, Ruggiero MJ, Valentinuzzo I, Mettulio T, Stolfa E, Fisicaro M, Vecchiet S, Mazzaro E, Zanetti M, Fabiani A. The severity of early fluid overload assessed by bioelectrical vector impedance as an independent risk factor for longer patient care after cardiac surgery. Clin Nutr 2024; 43:803-814. [PMID: 38350288 DOI: 10.1016/j.clnu.2024.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 02/03/2024] [Accepted: 02/06/2024] [Indexed: 02/15/2024]
Abstract
BACKGROUND AND AIMS Fluid overload is a common postoperative complication in patients undergoing cardiac surgery. Although this condition is notably associated with relevant adverse outcomes, assessment of hydration status in clinical practice is challenging. Bioelectrical impedance vector analysis (BIVA) has emerged as a potentially effective method to monitor hydration changes, but the available evidence in critically ill patients undergoing cardiac surgery is limited and sometimes conflicting. The aim of this study was to explore by mean of BIVA the evolution over time of hydration status and its impact on relevant outcomes. METHODS Prospective observational study enrolling 130 patients undergoing cardiac surgery. Height normalized impedance was calculated both before surgery (baseline) and in the first five postoperative days. Relevant clinical and laboratory data were collected daily close to BIVA measurements. Length of mechanical ventilation (MV), intensive care unit (ICU) and hospital stay exceeding the 75th percentile of the study population were considered as study endpoints. RESULTS Compared to baseline, a significant reduction in impedance was found at first postoperative day, demonstrating a relevant fluid overload. An adjusted impedance at first postoperative day shorter than the best respective threshold was associated to longer MV (7.4 times), ICU stay (4.7 times) and hospital stay (5.6 times). A significant change in impedance and phase angle was documented throughout the observation days (p < 0.001), without returning to the baseline value. The co-existence of low impedance and high plasma osmolarity increased significantly the risk of incurring the study outcomes. CONCLUSIONS In patients with cardiac surgery-induced fluid overload, recovery to baseline conditions occurs slowly. A relevant early fluid overload should be considered predictive for longer time of MV, ICU and total hospital stay.
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Affiliation(s)
- Gianfranco Sanson
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, Trieste, Italy.
| | - Lisa Doriguzzi
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Pierpaolo Garbari
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Maria Josè Ruggiero
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Ilaria Valentinuzzo
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Tanja Mettulio
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Elisa Stolfa
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Manuela Fisicaro
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Sara Vecchiet
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Enzo Mazzaro
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
| | - Michela Zanetti
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Strada di Fiume 447, Trieste, Italy.
| | - Adam Fabiani
- Cardiac Surgery Unit, Azienda Sanitaria Universitaria Giuliano-Isontina, Strada di Fiume 447, Trieste, Italy.
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Conroy DE, Marks J, Cutshaw A, Ram N, Thomaz E, Streeper NM. Promoting fluid intake to increase urine volume for kidney stone prevention: Protocol for a randomized controlled efficacy trial of the sip IT intervention. Contemp Clin Trials 2024; 138:107454. [PMID: 38253254 PMCID: PMC10923155 DOI: 10.1016/j.cct.2024.107454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 01/11/2024] [Accepted: 01/19/2024] [Indexed: 01/24/2024]
Abstract
BACKGROUND Risk of kidney stone recurrence can be reduced by increasing fluid intake and urine production but most patients fail to adhere to recommended clinical guidelines. Patients have indicated that common barriers to fluid intake include a lack of thirst, forgetting to drink, and not having access to water. We developed the sipIT intervention to support patients' fluid intake with semi-automated tracking (via a mobile app, connected water bottle and a smartwatch clockface that detects drinking gestures) and provision of just-in-time text message reminders to drink when they do not meet the hourly fluid intake goal needed to achieve the recommended volume. This trial evaluates the efficacy of sipIT for increasing urine output in patients at risk for recurrence of kidney stones. METHOD/DESIGN Adults with a history of kidney stones and lab-verified low urine production (<2 L/day) will be randomly assigned to receive either usual care (education and encouragement to meet fluid intake guidelines) or usual care plus the sipIT intervention. The primary outcome is 24-h urine volume; secondary outcomes include urinary supersaturations, past week fluid intake, and experienced automaticity of fluid intake. Outcomes will be assessed at baseline, 1 month, 3 months, and 12 months. CONCLUSIONS The sipIT intervention is the first to prompt periodic fluid intake through integration of just-in-time notifications and semi-automated tracking. If sipIT is more efficacious than usual care, this intervention provides an innovative treatment option for patients needing support in meeting fluid intake guidelines for kidney stone prevention.
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Affiliation(s)
- David E Conroy
- Department of Kinesiology, The Pennsylvania State University, University Park, PA 16802, USA.
| | - James Marks
- Department of Urology, The Pennsylvania State University, Hershey, PA 17033, USA
| | - Alyssa Cutshaw
- Department of Kinesiology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Nilam Ram
- Department of Communication and Psychology, Stanford University, Palo Alto, CA 94305, USA
| | - Edison Thomaz
- Department of Electrical and Computer Engineering, University of Texas, Austin, TX 78712, USA
| | - Necole M Streeper
- Department of Urology, The Pennsylvania State University, Hershey, PA 17033, USA
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12
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Francisco R, Jesus F, Nunes CL, Alvim M, Campa F, Sardinha LB, Mendonca GV, Lukaski H, Silva AM. Comparison of series and parallel reactance to identify changes in intracellular water in response to physical training in athletes during a sports season. Nutrition 2024; 123:112414. [PMID: 38564838 DOI: 10.1016/j.nut.2024.112414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/29/2024] [Accepted: 02/26/2024] [Indexed: 04/04/2024]
Abstract
OBJECTIVE Cross-sectional evidence has demonstrated that parallel reactance obtained by bioelectrical impedance analysis (BIA) may be an alternative to the regularly used series of measurements to predict intracellular water (ICW) in athletes. However, we are not aware of any studies that have determined the predictive role or compared the effectiveness of both series and parallel reactance for tracking ICW changes during an athletic season. The main aim of this study was to determine the predictive role and compare both series and parallel reactance (Xc) in tracking ICW during an athletic season. RESEARCH METHODS AND PROCEDURES This longitudinal study analyzed 108 athletes in the preparatory and competitive periods. Using dilution techniques, total body water (TBW) and extracellular water (ECW) were determined and ICW was calculated. Resistance (R), Xc, and impedance (Z) standardized for height were obtained through BIA spectroscopy using a frequency of 50kHz in a series array and then mathematically transformed in a parallel array. RESULTS Multiple regression analyses showed that only changes in parallel Xc and capacitance (CAP) (P < 0.05) were predictors of delta ICW during the sports season. In contracts, this was not the case for Xcs. Both changes in R and Z, series and parallel, predicted similarly the changes in ECW and TBW (P < 0.05) in athletes. CONCLUSION Our findings highlight the potential of parallel BIA values to detect changes in body water compartments over a competitive season. These data provide preliminary evidence that changes in parallel Xc/H, and ultimately CAP, represent valid markers of alterations in cell volume during a sports season.
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Affiliation(s)
- Rúben Francisco
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal.
| | - Filipe Jesus
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | | | - Marta Alvim
- National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
| | - Francesco Campa
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Luís B Sardinha
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - Goncalo V Mendonca
- Neuromuscular Research Lab, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - Henry Lukaski
- Department of Kinesiology and Public Health Education, Hyslop Sports Center, University of North Dakota, Grand Forks, North Dakota, USA
| | - Analiza M Silva
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
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13
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Zhou BC, Chen BZ, Song TT, Yang Y, Zhang LM, Ji DW, Wan B, Chen QA. Hydrated [3+2] Cyclotelomerization of Butafulvenes to Create Multiple Contiguous Fully Substituted Carbon Centers. Angew Chem Int Ed Engl 2024; 63:e202317299. [PMID: 38105386 DOI: 10.1002/anie.202317299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/11/2023] [Accepted: 12/15/2023] [Indexed: 12/19/2023]
Abstract
The construction of multiple continuous fully substituted carbon centers, which serve as unique structural motif in natural products, is a challenging topic in organic synthesis. Herein, we report a hydrated [3+2] cyclotelomerization of butafulvenes to create contiguous fully substituted carbon backbone. In the presence of scandium triflate, all-carbon skeleton with spiro fused tricyclic ring can be constructed in high diastereoselectivity by utilizing butafulvene as the synthon. Mechanistic studies suggest that this atom-economic reaction probably proceeds through a synergistic process containing butafulvenes dimerization and nucleophilic attack by water. In addition, the tricyclic product can undergo a series of synthetic derivatizations, which highlights the potential applications of this strategy. The recyclability of Sc(OTf)3 has also been demonstrated to show its robust performance in this hydrated cyclotelomerization.
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Affiliation(s)
- Bo-Chao Zhou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bing-Zhi Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ting-Ting Song
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Yang Yang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Li-Ming Zhang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ding-Wei Ji
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Boshun Wan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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14
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Chen PR, Chu LK. Infrared characterization of hydrated products of glyoxal in aqueous solution. Spectrochim Acta A Mol Biomol Spectrosc 2024; 306:123571. [PMID: 37944380 DOI: 10.1016/j.saa.2023.123571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/19/2023] [Accepted: 10/21/2023] [Indexed: 11/12/2023]
Abstract
The simplest and most abundant dicarbonyl in the atmosphere, glyoxal ((CHO)2), and its geminal diols via stepwise hydration reactions, monohydrate (CHOCH(OH)2) and dihydrate ((HC(OH)2)2), are proposed to be responsible for the generation of atmospheric acid and the increase in aerosol viscosity. In this work, the hydrates of glyoxal were prepared by dissolving glyoxal trimer dihydrate (C6H10O8) in H2O and D2O and probed by infrared absorption spectrometry at varied temperatures. In glyoxal aqueous solution at a concentration of < 1 wt%, the monomeric dihydrate is predominant. Coupled with the predicted vibrational wavenumbers and the corresponding intensities using the B3LYP/aug-cc-pVTZ method, the intense IR bands at 1075 cm-1 and 1073 cm-1 are attributed to the C-O stretching modes of dihydrate and deuterium substituted dihydrate at the hydroxyl groups, denoted as d4-dihydrate ((HC(OD)2)2). Upon heating of the d4-dihydrate solution to cause dehydration, a new band generated at 1745 cm-1 was attributed to the C=O stretching mode of d2-monohydrate (CHOCH(OD)2). Comparing the predicted wavenumbers of glyoxal monohydrate and the observed vibrational wavenumbers of the glycolaldehyde (HCOCH2OH), the wavenumber of the C=O stretching mode of monohydrate is reasonably presumed to be 1745 ± 5 cm-1. These infrared characterizations of the glyoxal hydrates provide suitable detection windows for further investigating the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as studying the relevant reaction kinetics.
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Affiliation(s)
- Pei-Rong Chen
- Department of Chemistry, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Rd, Hsinchu 300044, Taiwan
| | - Li-Kang Chu
- Department of Chemistry, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Rd, Hsinchu 300044, Taiwan.
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15
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Mathew GM, Nahmod NG, Master L, Reichenberger DA, Rosinger AY, Chang AM. Effects of a 1-hour per night week-long sleep extension in college students on cardiometabolic parameters, hydration status, and physical activity: A pilot study. Sleep Health 2024; 10:S130-S139. [PMID: 37996285 DOI: 10.1016/j.sleh.2023.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 10/10/2023] [Accepted: 10/12/2023] [Indexed: 11/25/2023]
Abstract
OBJECTIVES Short sleep duration is associated with poor physical health in college students. Few studies examine the effects of sleep extension on physical health in this population, who are susceptible to sleep loss. We examined health effects of a 1-week, 1-hour nightly sleep extension in college students. METHODS Twelve healthy undergraduate college students (83% female; age 20.2 ± 1.5years) completed a study consisting of sleeping typically for 1week ("Habitual"), then extending sleep by ≥1 hour/night during the second week ("Extension"). Sleep and physical activity actigraphy were collected throughout. Following each week, participants completed cardiometabolic assessments including a meal response and provided a urine sample for markers of hydration. RESULTS In Extension compared to Habitual, average sleep duration increased (mean change±SEM, +42.6 ± 15.1 minutes; p = .005), while subjective sleepiness (-1.8 ± 0.8 units; p = .040), systolic blood pressure (-6.6 ± 2.8 mmHg; p = .037), postprandial glucose area under the curve (-26.5 ± 10.2 mg/dL × h; p = .025) and time to baseline (-83.0 ± 46.4 minutes; p = .031) after the meal response, sedentary time (-44.3 ± 15.7 minutes; p = .018), and percentage of wake in moderate-to-vigorous activity (-0.89% ± 0.35%; p = .030) decreased. Participants who increased average sleep duration by ≥20 minutes (n = 9) were better hydrated according to urine osmolality (-187.0 ± 68.4 mOsm/kg; p = .026) and specific gravity (-0.01 ± 0.002 g/mL; p = .012) and had reduced odds of dehydration according to urine osmolality (≥800 mOsm/kg; -67%; OR=0.03; p = .035). CONCLUSIONS This pilot study's findings suggest that sleep extension may improve cardiometabolic functioning and hydration, and alter sedentary behavior and physical activity, in college students. Sleep extension may be employed to improve multiple aspects of health in this sleep-deprived population.
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Affiliation(s)
- Gina Marie Mathew
- Department of Biobehavioral Health, College of Health and Human Development, Pennsylvania State University, University Park, Pennsylvania, USA.
| | - Nicole G Nahmod
- Department of Biobehavioral Health, College of Health and Human Development, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Lindsay Master
- Department of Biobehavioral Health, College of Health and Human Development, Pennsylvania State University, University Park, Pennsylvania, USA
| | - David A Reichenberger
- Department of Biobehavioral Health, College of Health and Human Development, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Asher Y Rosinger
- Department of Biobehavioral Health, College of Health and Human Development, Pennsylvania State University, University Park, Pennsylvania, USA; Department of Anthropology, College of Liberal Arts, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Anne-Marie Chang
- Department of Biobehavioral Health, College of Health and Human Development, Pennsylvania State University, University Park, Pennsylvania, USA
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16
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Le Page AK, Johnstone LM, Kausman JY. Hospital admissions associated with de hydration in childhood kidney transplantation. Pediatr Nephrol 2024; 39:547-557. [PMID: 37555933 PMCID: PMC10728223 DOI: 10.1007/s00467-023-06095-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 08/10/2023]
Abstract
BACKGROUND Paediatric kidney transplant recipients may be at a particular risk of dehydration due to poor kidney concentrating capacity and illness associated with poor fluid intake or losses. In this population, creatinine rise may be more likely with relatively mild dehydration, which may trigger hospital admission. This study describes hospital admissions in the first 12 months after transplantation with diagnosis of graft dysfunction associated with dehydration due to illness or poor fluid intake. We assess risk factors for these admissions. METHODS Data was extracted from medical records of patients transplanted in two tertiary children hospitals. Following descriptive analysis, multiple failure regression analyses were used to identify factors associated with admission for acute kidney allograft dysfunction associated with dehydration. RESULTS Of 92 children, 42% had at least 1 dehydration admission in the 12 months following transplantation. Almost half of the dehydration admissions were due to poor fluid intake, which accounted for 1/5 of all unplanned hospital admissions. Target fluid intake at first discharge of > 100 ml/kg/day was associated with dehydration admissions of all types (hazard ratio (HR) 2.04 (95% CI 1.13-3.68)). Teen age was associated with poor fluid intake dehydration admissions (HR 4.87 (95% CI 1.19-19.86)), which were more frequent in mid-summer. Use of enteric feeding tube, which correlated with age under 4, associated with contributing illness dehydration admissions (HR 2.18 (95% CI 1.08-4.41)). CONCLUSIONS Dehydration admissions in the 12 months following childhood kidney transplantation are common. Highlighted admission risk factors should prompt further study into optimal fluid intake prescription and hydration advice given to children, teenagers, and their carers following kidney transplantation. Use of an enteric feeding tube may not protect patients from admission with dehydration associated with contributing illness. A highger resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Amelia K Le Page
- Department of Nephrology, Monash Children's Hospital, Clayton, VIC, Australia.
- Department of Pediatrics, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia.
| | - Lilian M Johnstone
- Department of Nephrology, Monash Children's Hospital, Clayton, VIC, Australia
- Department of Pediatrics, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
| | - Joshua Y Kausman
- Department of Nephrology, Royal Children's Hospital, Melbourne, Australia
- Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Australia
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17
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Évora AS, Zhang Z, Johnson SA, Adams MJ. The effects of hydration on the topographical and mechanical properties of corneocytes. J Mech Behav Biomed Mater 2024; 150:106296. [PMID: 38141363 DOI: 10.1016/j.jmbbm.2023.106296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/04/2023] [Accepted: 12/02/2023] [Indexed: 12/25/2023]
Abstract
It is well established that the biomechanical properties of the Stratum Corneum (SC) are influenced by both moisture-induced plasticization and the lipid content. This study employs Atomic Force Microscopy to investigate how hydration affects the surface topographical and elasto-viscoplastic characteristics of corneocytes from two anatomical sites. Volar forearm cells underwent swelling when immersed in water with a 50% increase in thickness and volume. Similarly, medial heel cells demonstrated significant swelling in volume, accompanied by increased cell area and reduced cell roughness. Furthermore, as the water activity was increased, they exhibited enhanced compliance, leading to a decreased Young's modulus, hardness, and relaxation times. Moreover, the swollen cells also displayed a greater tolerance to strain before experiencing permanent deformation. Despite the greater predominance of immature cornified envelopes in plantar skin, the comparable Young's modulus of medial heel and forearm corneocytes suggests that cell stiffness primarily relies on the keratin matrix rather than on the cornified envelope. The Young's moduli of the cells in distilled water are similar to those reported for the SC, which suggests that the corneodesmosomes and intercellular lamellae lipids junctions that connect the corneocytes are able to accommodate the mechanical deformations of the SC.
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Affiliation(s)
- Ana S Évora
- School of Chemical Engineering, University of Birmingham, Birmingham, UK.
| | - Zhibing Zhang
- School of Chemical Engineering, University of Birmingham, Birmingham, UK.
| | - Simon A Johnson
- School of Chemical Engineering, University of Birmingham, Birmingham, UK.
| | - Michael J Adams
- School of Chemical Engineering, University of Birmingham, Birmingham, UK.
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18
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Song X, Man J, Qiu Y, Wang J, Liu J, Li R, Zhang Y, Li J, Li J, Chen Y. Design, preparation, and characterization of lubricating polymer brushes for biomedical applications. Acta Biomater 2024; 175:76-105. [PMID: 38128641 DOI: 10.1016/j.actbio.2023.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/21/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023]
Abstract
The lubrication modification of biomedical devices significantly enhances the functionality of implanted interventional medical devices, thereby providing additional benefits for patients. Polymer brush coating provides a convenient and efficient method for surface modification while ensuring the preservation of the substrate's original properties. The current research has focused on a "trial and error" method to finding polymer brushes with superior lubricity qualities, which is time-consuming and expensive, as obtaining effective and long-lasting lubricity properties for polymer brushes is difficult. This review summarizes recent research advances in the biomedical field in the design, material selection, preparation, and characterization of lubricating and antifouling polymer brushes, which follow the polymer brush development process. This review begins by examining various approaches to polymer brush design, including molecular dynamics simulation and machine learning, from the fundamentals of polymer brush lubrication. Recent advancements in polymer brush design are then synthesized and potential avenues for future research are explored. Emphasis is placed on the burgeoning field of zwitterionic polymer brushes, and highlighting the broad prospects of supramolecular polymer brushes based on host-guest interactions in the field of self-repairing polymer brush applications. The review culminates by providing a summary of methodologies for characterizing the structural and functional attributes of polymer brushes. It is believed that a development approach for polymer brushes based on "design-material selection-preparation-characterization" can be created, easing the challenge of creating polymer brushes with high-performance lubricating qualities and enabling the on-demand creation of coatings. STATEMENT OF SIGNIFICANCE: Biomedical devices have severe lubrication modification needs, and surface lubrication modification by polymer brush coating is currently the most promising means. However, the design and preparation of polymer brushes often involves "iterative testing" to find polymer brushes with excellent lubrication properties, which is both time-consuming and expensive. This review proposes a polymer brush development process based on the "design-material selection-preparation-characterization" strategy and summarizes recent research advances and trends in the design, material selection, preparation, and characterization of polymer brushes. This review will help polymer brush researchers by alleviating the challenges of creating polymer brushes with high-performance lubricity and promises to enable the on-demand construction of polymer brush lubrication coatings.
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Affiliation(s)
- Xinzhong Song
- Key Laboratory of High Efficiency and Clean Mechanicalanufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China
| | - Jia Man
- Key Laboratory of High Efficiency and Clean Mechanicalanufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China.
| | - Yinghua Qiu
- Key Laboratory of High Efficiency and Clean Mechanicalanufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China
| | - Jiali Wang
- Qilu Hospital of Shandong University, Jinan 250012, PR China
| | - Jianing Liu
- Qilu Hospital of Shandong University, Jinan 250012, PR China
| | - Ruijian Li
- Qilu Hospital of Shandong University, Jinan 250012, PR China
| | - Yongqi Zhang
- Key Laboratory of High Efficiency and Clean Mechanicalanufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China
| | - Jianyong Li
- Key Laboratory of High Efficiency and Clean Mechanicalanufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China
| | - Jianfeng Li
- Key Laboratory of High Efficiency and Clean Mechanicalanufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China
| | - Yuguo Chen
- Qilu Hospital of Shandong University, Jinan 250012, PR China
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Schulke S, Nolten M, Schwaab G, Havenith M. Studying Local Electrostatics by Terahertz Spectroscopy Using Amines as a Probe. Chemphyschem 2024; 25:e202300389. [PMID: 37897334 DOI: 10.1002/cphc.202300389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 09/20/2023] [Accepted: 10/26/2023] [Indexed: 10/30/2023]
Abstract
In a previous study[1] we could show that a large amplitude mode of the zwitterion glycine can serve as a sensitive probe for protonation and allows to deduce local pKa values. Here we show that the underlying concept is more general: We present the results of a pH dependent measurement of Terahertz-FTIR (THz-FTIR) spectra of solvated amines, i. e. Diethylamine (DEA), Triethylamine (TEA), and Diisopropylamine (DiPA). We show that amines serve as a sensitive, label free probe for local protonation. Protonation of the amines yield intensity changes which can be quantified by precise THz spectroscopy (30 cm-1 -450 cm-1 ). A detailed analysis allows us to correlate the titration spectra of solvated amines in the THz range with pKa values. This demonstrates the potential of THz spectroscopy to probe the charge state of biomolecules in water in a label free manner.
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Affiliation(s)
- Simon Schulke
- Physical Chemistry 2, Ruhr-Univeristy Bochum, Universitaetsstraße 150, 44801, Bochum, Germany
| | - Melinda Nolten
- Physical Chemistry 2, Ruhr-Univeristy Bochum, Universitaetsstraße 150, 44801, Bochum, Germany
| | - Gerhard Schwaab
- Physical Chemistry 2, Ruhr-Univeristy Bochum, Universitaetsstraße 150, 44801, Bochum, Germany
| | - Martina Havenith
- Physical Chemistry 2, Ruhr-Univeristy Bochum, Universitaetsstraße 150, 44801, Bochum, Germany
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20
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Li J, Wu Y, Chen C, Zhang W, Yue L, Liu T. A systematic review for prevention of cisplatin-induced nephrotoxicity using different hydration protocols and meta-analysis for magnesium hydrate supplementation. Clin Exp Nephrol 2024; 28:1-12. [PMID: 37530867 DOI: 10.1007/s10157-023-02386-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 07/17/2023] [Indexed: 08/03/2023]
Abstract
BACKGROUND Nephrotoxicity remains the most serious side effect of cisplatin therapy. Cisplatin-induced nephrotoxicity (CIN) limits the use of this drug and affects up to 20% of patients. Several possible interventions such as magnesium supplementation may prevent CIN. This study aimed to review different types of hydration protocols and we conducted a meta-analysis of magnesium supplementation to understand its effect in protecting against CIN. METHODS A search of the PubMed, Embase, and Cochrane databases was performed. Trials were eligible if they enrolled patients who received cisplatin and different hydration protocols to prevent CIN. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to assess the efficacy of different protocols. RESULTS We initially identified 1113 different studies and included 33 of them which met the selection criteria. A meta-analysis of 11 retrospective studies that examined magnesium supplementation during hydration showed that this treatment provided significant protection against CIN (OR = 0.22, 95% CI = 0.14 to 0.35). CONCLUSION There has been uncertainty regarding the best method to prevent CIN. Our results highlight the potentially protective effect of magnesium supplementation during hydration. This study is registered in PROSPERO, CRD42020212682.
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Affiliation(s)
- Juanjuan Li
- Division of Nephrology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 68 Gehu Road, Hutang Town, Wujin District, Changzhou, Jiangsu, China
| | - Yu Wu
- Division of Nephrology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 68 Gehu Road, Hutang Town, Wujin District, Changzhou, Jiangsu, China
| | - Cheng Chen
- Division of Nephrology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 68 Gehu Road, Hutang Town, Wujin District, Changzhou, Jiangsu, China
| | - Wanfen Zhang
- Division of Nephrology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 68 Gehu Road, Hutang Town, Wujin District, Changzhou, Jiangsu, China
| | - Lili Yue
- Division of Nephrology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 68 Gehu Road, Hutang Town, Wujin District, Changzhou, Jiangsu, China.
| | - Tongqiang Liu
- Division of Nephrology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 68 Gehu Road, Hutang Town, Wujin District, Changzhou, Jiangsu, China.
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Wang J, Deng X, Tan H, Guo H, Zhang J, Li M, Chen P, He X, Yang J, Jian S, Yang Z. The mechanical properties and sustainability of phosphogypsum-slag binder activated by nano-ettringite. Sci Total Environ 2023; 903:166015. [PMID: 37579808 DOI: 10.1016/j.scitotenv.2023.166015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 07/05/2023] [Accepted: 08/01/2023] [Indexed: 08/16/2023]
Abstract
The cementitious material based on phosphogypsum (PG) and ground granulated blast furnace slag (GBFS) demonstrates good economy and sustainability, whereas its drawback of ultra-slow strength development seems unacceptable. In this study, an attempt to drive the hydration of PG-GBFS and further facilitate the strength development by introducing nano-ettringite (NE) was carried out. The impact of 1- 5 % NE on the compressive strength, hydration process, dissolution behavior, and microstructure evolution of PG-GBFS were investigated. The results showed that the incorporation of NE significantly increased the compressive strength of PG-GBFS. At 7 d, the strength grew from 0 MPa to a range of 7.6- 20.2 MPa, and at 28 d, it was enhanced from 22.9 MPa to a range of 45.6- 79.0 MPa. The reason was that the introduction of NE induced the formation of AFt, thereby accelerating the hydration process and promoting the development of the skeletal network, resulting in higher early strength. Besides, NE facilitated the formation of C-S(A)-H gel, which further refined the pore structure and led to continuous growth in later strength. Additionally, PG-GFBS with 5 % NE exhibited significantly lower total costs (35.0 % of NaOH-activated slag and 51.7 % of water glass-activated slag) and lower carbon emissions (30.8 % of NaOH-activated slag and 49.8 % of water glass-activated slag) at the same 28 d compressive strength, indicating its strong competitiveness in both sustainability and economy.
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Affiliation(s)
- Jintang Wang
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China
| | - Xiufeng Deng
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China; National Engineering Laboratory for Fiber Optic Sensing Technologies, Wuhan University of Technology, Wuhan 430070, PR China
| | - Hongbo Tan
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, PR China.
| | - Huiyong Guo
- National Engineering Laboratory for Fiber Optic Sensing Technologies, Wuhan University of Technology, Wuhan 430070, PR China
| | - Junjie Zhang
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China
| | - Maogao Li
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China
| | - Pian Chen
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China
| | - Xingyang He
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430070, PR China
| | - Jin Yang
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430070, PR China
| | - Shouwei Jian
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China
| | - Zhuowen Yang
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China
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22
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McMichael D, Gillen P, McGeary C, Sartaj M, Patterson L. Investigating the impact of an online hydration intervention in care homes using the COM-B model: a mixed methods study. BMC Geriatr 2023; 23:822. [PMID: 38066418 PMCID: PMC10704796 DOI: 10.1186/s12877-023-04515-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 11/24/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Antimicrobial resistance is a serious threat to public health. To reduce antimicrobial resistance, interventions to reduce gram-negative infections, specifically urinary tract infections, are vital. Early evidence suggests increased fluid intake is linked with a reduction in UTIs and subsequently has potential to reduce antibiotic usage. Care homes have a high prevalence of UTIs and provide an opportunity in a closed setting to deliver an intervention focused on increasing fluid intake, where it is supported and monitored by health care workers. The study aimed to evaluate the impact and feasibility of an online staff focused intervention over a 30 day period to increase the hydration of care home residents with a view to reducing the burden of AMR in this setting. METHODS The study was a pre and post intervention with a sequential explanatory mixed methods design. The intervention was delivered online in 3 care homes, containing 3 main components underpinned by the COM-B model including hydration training, 7 structured drinks rounds and a hydration champion to change behaviour of care home staff. A pre and post questionnaire assessed the impact of the intervention on staff and data was collected on fluid intake, drinks rounds delivered to residents, UTIs, antibiotic used to treat UTIs, falls and hospitalisation. Descriptive statistics summarised and assessed the impact of the study. Focus groups with care home staff provided qualitative data which was thematically analysed. RESULTS Staff increased in self-perceived knowledge across the six components of hydration care. 59% of residents had an increase in median fluid intake post intervention. During the time of the intervention, a 13% decrease in UTIs and antibiotic usage to treat UTIs across the 3 care homes was recorded, however falls and hospitalisations increased. Themes arising from focus groups included the role of information for action, accessibility of online training, online training content. CONCLUSIONS This study demonstrates that a brief, low cost, online multi-component intervention focused on care home staff can increase the fluid intake of residents. A reduction in UTIs and antibiotic consumption was observed overall. Empowering care home staff could be a way of reducing the burden of infection in this setting.
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Affiliation(s)
- Danielle McMichael
- Public Health Agency, 12-22 Linenhall Street, Belfast, BT2 8BS, Northern Ireland.
| | - Patricia Gillen
- Ulster University, Shore Rd, Newtownabbey, BT37 0QB, Northern Ireland
- Health and Social Care Trust, Rosedale, 10 Moyallen Road, Gilford, BT63 5JX, Northern Ireland
| | - Caroline McGeary
- Public Health Agency, 12-22 Linenhall Street, Belfast, BT2 8BS, Northern Ireland
| | - Muhammad Sartaj
- Public Health Agency, 12-22 Linenhall Street, Belfast, BT2 8BS, Northern Ireland
| | - Lynsey Patterson
- Public Health Agency, 12-22 Linenhall Street, Belfast, BT2 8BS, Northern Ireland
- Centre for Public Health, Institute of Clinical Sciences, Royal Victoria Hospital, Queen's University Belfast, Belfast, BT12 6BA, Northern Ireland
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23
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Pem B, Brkljača Z, Philippe A, Schaumann GE, Vazdar M, Bakarić D. FTIR spectroscopy and molecular level insight of diluted aqueous solutions of acetic acid. Spectrochim Acta A Mol Biomol Spectrosc 2023; 302:123135. [PMID: 37454436 DOI: 10.1016/j.saa.2023.123135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 06/27/2023] [Accepted: 07/10/2023] [Indexed: 07/18/2023]
Abstract
Aqueous solutions of acetic acid (AA) have been intensively explored for decades with a particular attention addressed to the hydrogen bond network generated by COOH group at different concentrations. In majority of studies conducted so far the envelope originated from νCO is decomposed into two bands assigned to differently hydrated monomers: the one presumably to AA···H2O, and another one to AA···(H2O)2. In order to examine if species other than the mentioned monomers produce this spectral signature, we performed computational and FTIR spectroscopic study of AA in aqueous solutions. Dilute solutions of deuterated acetic acid (CD3COOD) in D2O and in C2Cl4 as a reference were prepared (c0 = 0.001, 0.01 and 0.1 mol dm-3) as well as of deuterated sodium acetate (CD3COONa) in D2O. CD3COOD in 0.1 mol dm-3 solution in D2O displays a feature that separated in two signals with maxima at 1706 cm-1 and 1687 cm-1. A combined DFT and molecular dynamics study performed in this work showed the assignation of those spectral bands to be a more complex problem than previously thought, with syn-anti isomerism and hydration contributing to the experimentally observed broad νCO envelope.
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Affiliation(s)
- Barbara Pem
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Zlatko Brkljača
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; Selvita d.o.o. Prilaz baruna Filipovića 29, 10000 Zagreb, Croatia
| | - Allan Philippe
- University of Koblenz-Landau, iES Landau-Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstraße 7, D-76829 Landau, Germany
| | - Gabriele E Schaumann
- University of Koblenz-Landau, iES Landau-Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstraße 7, D-76829 Landau, Germany
| | - Mario Vazdar
- Department of Mathematics, Informatics and Cybernetics, University of Chemistry and Technology, 166 28 Prague, Czech Republic
| | - Danijela Bakarić
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; University of Koblenz-Landau, iES Landau-Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstraße 7, D-76829 Landau, Germany.
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24
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Cebrián-Ponce Á, Marini E, Stagi S, Castizo-Olier J, Carrasco-Marginet M, Garnacho-Castaño MV, Noriega Z, Espasa-Labrador J, Irurtia A. Body fluids and muscle changes in trail runners of various distances. PeerJ 2023; 11:e16563. [PMID: 38054016 PMCID: PMC10695110 DOI: 10.7717/peerj.16563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 11/12/2023] [Indexed: 12/07/2023] Open
Abstract
Background This study aims to investigate body fluids and muscle changes evoked by different trail races using anthropometric, bioelectrical, and creatine kinase (CK) measurements. Methods A total of 92 subjects (55 men, 37 women) participating in three different races of 14, 35, and 52 km were evaluated before (PRE) and after (POST) the races. Classic bioelectrical impedance vector analysis was applied at the whole-body level (WB-BIVA). Additionally, muscle-localized bioelectrical assessments (ML-BIVA) were performed in a subgroup of 11 men (in the quadriceps, hamstrings, and calves). PRE-POST differences and correlations between bioelectrical values and CK, running time and race distance were tested. Results Changes in whole-body vectors and phase angles disclosed an inclination towards dehydration among men in the 14, 35, and 52 km groups (p < 0.001), as well as among women in the 35 and 52 km groups (p < 0.001). PRE Z/H was negatively correlated with running time in the 35 km men group and 14 km women group (r = -0.377, p = 0.048; r = -0.751, p = 0.001; respectively). POST Z/H was negatively correlated with running time in the 14 km women group (r = -0.593, p = 0.02). CK was positively correlated with distance in men and women (p < 0.001) and negatively correlated with reactance and vector length in the 14 km men group (p < 0.05). ML-BIVA echoed the same tendency as the WB-BIVA in the 35 and 52 km runners, with the most notable changes occurring in the calves (p < 0.001). Conclusions WB-BIVA and CK measurements underscored a conspicuous trend towards post-race dehydration and muscle damage, displaying a weak association with performance. Notably, ML-BIVA detected substantial alterations primarily in the calves. The study underscores the utility of BIVA as a technique to assess athlete's body composition changes.
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Affiliation(s)
- Álex Cebrián-Ponce
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC). University of Barcelona (UB), Barcelona, Spain
| | - Elisabetta Marini
- Department of Life and Environmental Sciences. Neuroscience and Anthropology Section, University of Cagliari, Cagliari, Italy
| | - Silvia Stagi
- Department of Life and Environmental Sciences. Neuroscience and Anthropology Section, University of Cagliari, Cagliari, Italy
| | - Jorge Castizo-Olier
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC). University of Barcelona (UB), Barcelona, Spain
- DAFNiS Research Group (Pain, Physical Activity, Nutrition and Health), Campus Docent Sant Joan de Déu, University of Barcelona, Barcelona, Spain
| | - Marta Carrasco-Marginet
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC). University of Barcelona (UB), Barcelona, Spain
| | - Manuel Vicente Garnacho-Castaño
- DAFNiS Research Group (Pain, Physical Activity, Nutrition and Health), Campus Docent Sant Joan de Déu, University of Barcelona, Barcelona, Spain
- Faculty of Health Sciences, Valencian International University (VIU), Valencia, Spain
| | - Zeasseska Noriega
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC). University of Barcelona (UB), Barcelona, Spain
| | - Javier Espasa-Labrador
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC). University of Barcelona (UB), Barcelona, Spain
| | - Alfredo Irurtia
- INEFC-Barcelona Sports Sciences Research Group, National Institute of Physical Education of Catalonia (INEFC). University of Barcelona (UB), Barcelona, Spain
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25
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Moeller KT, Brashears JA, Davies S, Demare G, Smith GD, Brusch Iv GA, Simpson RK, DeNardo DF. Corticosterone and immune responses to de hydration in squamate reptiles. J Exp Biol 2023; 226:jeb246257. [PMID: 37955054 DOI: 10.1242/jeb.246257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 11/01/2023] [Indexed: 11/14/2023]
Abstract
Many environments present some degree of seasonal water limitations; organisms that live in such environments must be adapted to survive periods without permanent water access. Often this involves the ability to tolerate dehydration, which can have adverse physiological effects and is typically considered a physiological stressor. While having many functions, the hormone corticosterone (CORT) is often released in response to stressors, yet increasing plasma CORT while dehydrated could be considered maladaptive, especially for species that experience predictable bouts of dehydration and have related coping mechanisms. Elevating CORT could reduce immunocompetence and have other negative physiological effects. Thus, such species likely have CORT and immune responses adapted to experiencing seasonal droughts. We evaluated how dehydration affects CORT and immune function in eight squamate species that naturally experience varied water limitation. We tested whether hydric state affected plasma CORT concentrations and aspects of immunocompetence (lysis, agglutination, bacterial killing ability and white blood cell counts) differently among species based on how seasonally water limited they are and whether this is constrained by phylogeny. The species represented four familial pairs, with one species of each pair inhabiting environments with frequent access to water and one naturally experiencing extended periods (>30 days) with no access to standing water. The effects of dehydration on CORT and immunity varied among species. Increases in CORT were generally not associated with reduced immunocompetence, indicating CORT and immunity might be decoupled in some species. Interspecies variations in responses to dehydration were more clearly grouped by phylogeny than by habitat type.
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Affiliation(s)
- Karla T Moeller
- School of Life Sciences , Arizona State University, Tempe, AZ 85281, USA
| | - Jacqueline A Brashears
- Natural Sciences Department, LaGuardia Community College, Long Island City, NY 11101, USA
| | - Scott Davies
- Department of Biological Sciences, Quinnipiac University, Hamden, CT 06518, USA
| | - Guillaume Demare
- Museum für Naturkunde - Leibniz Institute for Evolution and Biodiversity Research, Invalidenstraße 43, 10115 Berlin, Germany
| | - Geoffrey D Smith
- Department of Biological Sciences, Utah Tech University, St George, UT 84770, USA
| | - George A Brusch Iv
- Department of Biological Sciences, California State University San Marcos, San Marcos, CA 92096, USA
| | - Richard K Simpson
- Nature Conservancy of Canada, Ontario Region, 245 Eglinton Ave East, Suite 410, Toronto, ON, Canada, M4P 3J1
| | - Dale F DeNardo
- School of Life Sciences , Arizona State University, Tempe, AZ 85281, USA
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26
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Guo Z, Du Z, Zhao Y, Shen X, Liang C. Vanadium-catalyzed Hydration of 2-Cyanopyrazine to Pyrazinamide with Unique Substrate Specificity. Chem Asian J 2023; 18:e202300741. [PMID: 37754564 DOI: 10.1002/asia.202300741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 09/28/2023]
Abstract
Pyrazinamide is an important medicine used for the treatment of tuberculosis(TB). The preparation of pyrazinamide via catalytic hydration of 2-cyanopyrazine is of great economic interest with high atomic economy. Heterogeneous non-precious transition metal-catalyzed hydration of nitriles under neutral reaction conditions would be rather attractive. Herein vanadium-nitrogen-carbon materials were fabricated and employed for selective hydration of nitriles using water as both the solvent and reactant. 2-Cyanopyrazine could be smoothly converted into to pyrazinamide with unique substrate specificity. Additives with different N and O atoms could significantly affect hydration of 2-cyanopyrazine due to competitive adsorption/coordination in the reaction system. This work provides a new approach for non-precious metal catalyzed hydration of nitriles.
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Affiliation(s)
- Zhongxu Guo
- School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin, 124221, P. R. China
| | - Zhongtian Du
- School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin, 124221, P. R. China
| | - Yanbin Zhao
- School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin, 124221, P. R. China
| | - Xiaoyu Shen
- School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin, 124221, P. R. China
| | - Changhai Liang
- School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin, 124221, P. R. China
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, P. R. China
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27
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Kong MJ, Han SJ, Seu SY, Han KH, Lipschutz JH, Park KM. High water intake induces primary cilium elongation in renal tubular cells. Kidney Res Clin Pract 2023:j.krcp.23.087. [PMID: 37933114 DOI: 10.23876/j.krcp.23.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 07/27/2023] [Indexed: 11/08/2023] Open
Abstract
Background The primary cilium protrudes from the cell surface and functions as a mechanosensor. Recently, we found that water intake restriction shortens the primary cilia of renal tubular cells, and a blockage of the shortening disturbs the ability of the kidneys to concentrate urine. Here, we investigate whether high water intake (HWI) alters primary cilia length, and if so, what is its underlying mechanism and its role on kidney urine production. Methods Experimental mice were given free access to normal water (normal water intake) or 3% sucrose-containing water for HWI for 2 days. Some mice were administered with U0126 (10 mg/kg body weight), an inhibitor of MEK kinase, from 2 days before HWI, daily. The primary cilium length and urine amount and osmolality were investigated. Results HWI-induced diluted urine production and primary cilium elongation in renal tubular cells. HWI increased the expression of α-tubulin acetyltransferase 1 (αTAT1), leading to the acetylation of α-tubulins, a core protein of the primary cilia. HWI also increased phosphorylated ERK1/2 (p-ERK1/2) and exocyst complex component 5 (EXOC5) expression in the kidneys. U0126 blocked HWI-induced increases in αTAT1, p-ERK1/2, and EXOC5 expression. U0126 inhibited HWI-induced α-tubulin acetylation, primary cilium elongation, urine amount increase, and urine osmolality decrease. Conclusion These results show that increased water intake elongates the primary cilia via ERK1/2 activation and that ERK inhibition prevents primary cilium elongation and diluted urine production. These data suggest that the elongation of primary cilium length is associated with the production of diluted urine.
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Affiliation(s)
- Min Jung Kong
- Department of Anatomy and Cardiovascular Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Sang Jun Han
- Department of Anatomy and Cardiovascular Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
- Department of Biotechnology, College of Fisheries Science, Pukyong National University, Busan, Republic of Korea
| | - Sung Young Seu
- Department of Anatomy and Cardiovascular Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Ki-Hwan Han
- Department of Anatomy, Ewha Womans University School of Medicine, Seoul, Republic of Korea
| | - Joshua H Lipschutz
- Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
- Department of Medicine, Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC, USA
| | - Kwon Moo Park
- Department of Anatomy and Cardiovascular Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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28
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Bhatia T. Stability of multilamellar lipid tubules in excess water. Eur Biophys J 2023; 52:749-756. [PMID: 37882815 DOI: 10.1007/s00249-023-01686-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 08/26/2023] [Accepted: 09/23/2023] [Indexed: 10/27/2023]
Abstract
In the lyotropic phase of lipids with excess water, multilamellar tubules (MLTs) grow from defects. A phenomenological model for the stability of MLTs is developed that is universal and independent of the underlying growth mechanisms of MLTs. The stability of MLTs implies that they are in hydrostatic equilibrium and stable as elastic objects that have compression and bending elasticity. The results show that even with solvent pressure differences of 0.1 atm, the density profile is not significantly altered, so suggesting the stability is due to the trapped solvent. The results are of sufficient value in relation to lamellar stability models and may have implications beyond the described MLT models, especially in other models of membrane systems.
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Affiliation(s)
- Tripta Bhatia
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, Knowledge City, Manauli, SAS Nagar, Mohali, Punjab, 140306, India.
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29
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Miller C, Jones SP, Bangee M, Martinez-Garduno CM, Brady MC, Cadilhac DA, Dale S, McInnes E, Middleton S, Watkins CL, Lightbody CE. Hydration and nutrition care practices in stroke: findings from the UK and Australia. BMC Nurs 2023; 22:403. [PMID: 37891567 PMCID: PMC10604400 DOI: 10.1186/s12912-023-01575-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 10/22/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Dehydration and malnutrition are common in hospitalised patients following stroke leading to poor outcomes including increased mortality. Little is known about hydration and nutrition care practices in hospital to avoid dehydration or malnutrition, and how these practices vary in different countries. This study sought to capture how the hydration and nutrition needs of patients' post-stroke are assessed and managed in the United Kingdom (UK) and Australia (AUS). AIM To examine and compare current in-hospital hydration and nutrition care practice for patients with stroke in the UK and Australia. METHODS A cross-sectional survey was conducted between April and November 2019. Questionnaires were mailed to stroke specialist nurses in UK and Australian hospitals providing post-stroke inpatient acute care or rehabilitation. Non-respondents were contacted up to five times. RESULTS We received 150/174 (86%) completed surveys from hospitals in the UK, and 120/162 (74%) in Australia. Of the 270 responding hospitals, 96% reported undertaking assessment of hydration status during an admission, with nurses most likely to complete assessments (85%). The most common methods of admission assessment were visual assessment of the patient (UK 62%; AUS 58%), weight (UK 52%; AUS 52%), and body mass index (UK 47%; AUS 42%). Almost all (99%) sites reported that nutrition status was assessed at some point during admission, and these were mainly completed by nurses (91%). Use of standardised nutrition screening tools were more common in the UK (91%) than Australia (60%). Similar proportions of hydration management decisions were made by physicians (UK 84%; AUS 83%), and nutrition management decisions by dietitians (UK 98%; AUS 97%). CONCLUSION Despite broadly similar hydration and nutrition care practices after stroke in the UK and Australia, some variability was identified. Although nutrition assessment was more often informed by structured screening tools, the routine assessment of hydration was generally not. Nurses were responsible for assessment and monitoring, while dietitians and physicians undertook decision-making regarding management. Hydration care could be improved through the development of standardised assessment tools. This study highlights the need for increased implementation and use of evidence-based protocols in stroke hydration and nutrition care to improve patient outcomes.
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Affiliation(s)
- Colette Miller
- Stroke Research Team, School of Nursing & Midwifery, University of Central Lancashire, Preston, PR1 2HE, UK.
| | - Stephanie P Jones
- Stroke Research Team, School of Nursing & Midwifery, University of Central Lancashire, Preston, PR1 2HE, UK
| | - Munirah Bangee
- Stroke Research Team, School of Nursing & Midwifery, University of Central Lancashire, Preston, PR1 2HE, UK
| | - Cintia Mayel Martinez-Garduno
- Nursing Research Institute - St Vincent's Health Network Sydney, St Vincent's Hospital Melbourne & Australian Catholic University, Sydney, Australia
| | - Marian C Brady
- Nursing, Midwifery and Allied Health Professions Research Unit, Glasgow Caledonian University, Glasgow, UK
| | - Dominique A Cadilhac
- Stroke and Ageing Research, Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, VIC, Melbourne, Australia
| | - Simeon Dale
- Nursing Research Institute - St Vincent's Health Network Sydney, St Vincent's Hospital Melbourne & Australian Catholic University, Sydney, Australia
- School of Nursing, Midwifery and Paramedicine, Australian Catholic University, VIC, Melbourne, Australia
| | - Elizabeth McInnes
- Nursing Research Institute - St Vincent's Health Network Sydney, St Vincent's Hospital Melbourne & Australian Catholic University, Sydney, Australia
- School of Nursing, Midwifery and Paramedicine, Australian Catholic University, VIC, Melbourne, Australia
| | - Sandy Middleton
- Nursing Research Institute - St Vincent's Health Network Sydney, St Vincent's Hospital Melbourne & Australian Catholic University, Sydney, Australia
- School of Nursing, Midwifery and Paramedicine, Australian Catholic University, VIC, Melbourne, Australia
| | - Caroline L Watkins
- Stroke Research Team, School of Nursing & Midwifery, University of Central Lancashire, Preston, PR1 2HE, UK
| | - C Elizabeth Lightbody
- Stroke Research Team, School of Nursing & Midwifery, University of Central Lancashire, Preston, PR1 2HE, UK
- Lancashire Teaching Hospitals NHS Foundation Trust, Preston, UK
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30
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Sessa C, Zanoli L, Noto G, Alessandrello I, Galeano D, Giglio E, Giuffrida AE, Distefano G, Ficara V, Messina RM, Musumeci S, Scollo V, Zirino F, Zuppardo C, Morale W. [Contrast Media Toxicity and Its Prevention]. G Ital Nefrol 2023; 40:2023-vol5. [PMID: 38010244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Intravenous iodinated contrast media are commonly used in clinical practice, ranging from medical imaging to interventional radiology (IR) procedures and endovascular interventions. Compared with patients with normal renal function, nephropathic patients have an increased risk of acute kidney injury (AKI). Nevertheless, this condition cannot represent a limit to diagnostics or endovascular interventions. Despite the literature of the last five years, conflicting management and approaches for nephropathic patients persist, including the use of contrast agents and treatments replacing renal functions, which are often mistakenly considered as part of preventive strategies. Though the issue has been widely discussed, specialists often cope with uncertainty in handling properly the administration of contrast media and renal counselling requests. Furthermore, there is a general difficulty in distinguishing the Post-Contrast Acute Kidney Injury (PC-AKI) from the Contrast-Associated Acute Kidney Injury (CI-AKI). The present review aims to provide an update on the issue and examine strategies to reduce the acute kidney injury risk after the administration of contrast media. These strategies include the early identification of high-risk individuals, the choice of the contrast media and the proper dosage, the suspension of nephrotoxic drugs, the follow-up of the high-risk individuals, and the early identification of AKI.
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Affiliation(s)
- Concetto Sessa
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | - Luca Zanoli
- Nefrologia, Dipartimento di Medicina Clinica e Sperimentale, Università di Catania, Catania (CT)
| | - Giovanni Noto
- U.O.C. Medicina e Chirurgia d'Accettazione e Urgenza, P.O. Giovanni Paolo II, Ragusa (RG)
| | - Ivana Alessandrello
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | - Dario Galeano
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | - Elisa Giglio
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | | | - Giulio Distefano
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | - Vincenzo Ficara
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | | | - Stella Musumeci
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | - Viviana Scollo
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | - Fortunata Zirino
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | - Carmelo Zuppardo
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
| | - Walter Morale
- U.O.C. Nefrologia e Dialisi, P.O. Maggiore "Nino Baglieri", Modica, Ragusa (RG)
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31
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Solomon R. Hydration to Prevent Contrast-Associated Acute Kidney Injury in Patients Undergoing Cardiac Angiography. Interv Cardiol Clin 2023; 12:515-524. [PMID: 37673495 DOI: 10.1016/j.iccl.2023.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Administration of fluid (oral and intravenous) is the cornerstone of prevention of contrast-associated acute kidney injury in the cardiac environment. Intravenous saline is the preferred fluid. The amount, timing, and duration of therapy are discussed. A key determinant of the benefit may be the rate of urine output stimulated by the therapy. Approaches using hemodynamic-guided rates of fluid administration and novel techniques to generate large urine outputs while maintaining fluid balance are highlighted.
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Affiliation(s)
- Richard Solomon
- Larner College of Medicine, University of Vermont, Burlington, VT 05401, USA.
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32
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Rodriguez-Sanchez N, Galloway SDR. A randomised trial to assess fluid and electrolyte balance responses following ingestion of different beverages in young and older men. Eur J Appl Physiol 2023; 123:2331-2340. [PMID: 37294517 PMCID: PMC10492686 DOI: 10.1007/s00421-023-05241-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 05/23/2023] [Indexed: 06/10/2023]
Abstract
BACKGROUND Older adults are susceptible to dehydration and fluid overload due to a reduced ability to maintain homeostatic control of fluid and electrolyte balance. PURPOSE To assess fluid and electrolyte balance responses in young and older men following ingestion of commonly consumed beverages differing in composition. METHODS 12 young and 11 older men were recruited. Euhydrated body mass was recorded. Participants consumed 1L (250 ml every 15 min) of water, fruit juice, a sports drink or low-fat milk in a randomized cross-over design. Urine and blood samples were obtained before and after the drinking period and every hour thereafter for 3-h. Samples were used to determine osmolality, electrolytes (Na+ and K+), water clearance, and glomerular filtration rate. RESULTS Free water clearance was significantly higher in Young than Older at 1 and 2 h after the ingestion of W and S (p < 0.05). Net Na+ and K+ balance were not different between Young and Older (p = 0.91 and p = 0.65) adults, respectively. At 3 h Na+ balance was negative after ingesting water and fruit juice, but neutral after sport drink and milk. Net K+ balance was neutral at 3 h after ingesting milk, but negative after water, fruit juice and sport drink. CONCLUSIONS Milk was retained longer than other beverages in Young, but not in Older, despite similar net electrolyte balance responses. Older had higher fluid retention in the first 2 h after the ingestion of all beverages, except for milk when compared to Young, indicating an age-related loss of ability to regulate fluid balance under current study conditions.
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Affiliation(s)
- Nidia Rodriguez-Sanchez
- Physiology, Exercise and Nutrition Research Group, Faculty of Health Sciences and Sport, University of Stirling, Stirling, FK9 4LA, UK.
| | - Stuart D R Galloway
- Physiology, Exercise and Nutrition Research Group, Faculty of Health Sciences and Sport, University of Stirling, Stirling, FK9 4LA, UK
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33
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Zhao W, Hou Q, Qi Y, Wu S, Wan X. Structural and molecular basis of pollen germination. Plant Physiol Biochem 2023; 203:108042. [PMID: 37738868 DOI: 10.1016/j.plaphy.2023.108042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/27/2023] [Accepted: 09/14/2023] [Indexed: 09/24/2023]
Abstract
Pollen germination is a prerequisite for double fertilization of flowering plants. A comprehensive understanding of the structural and molecular basis of pollen germination holds great potential for crop yield improvement. The pollen aperture serves as the foundation for most plant pollen germination and pollen aperture formation involves the establishment of cellular polarity, the formation of distinct membrane domains, and the precise deposition of extracellular substances. Successful pollen germination requires precise material exchange and signal transduction between the pollen grain and the stigma. Recent cytological and mutant analysis of pollen germination process in Arabidopsis and rice has expanded our understanding of this biological process. However, the overall changes in germination site structure and energy-related metabolites during pollen germination remain to be further explored. This review summarizes and compares the recent advances in the processes of pollen aperture formation, pollen adhesion, hydration, and germination between eudicot Arabidopsis and monocot rice, and provides insights into the structural basis and molecular mechanisms underlying pollen germination process.
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Affiliation(s)
- Wei Zhao
- Research Institute of Biology and Agriculture, Shunde Innovation School, University of Science and Technology Beijing (USTB), Beijing, 100083, China
| | - Quancan Hou
- Research Institute of Biology and Agriculture, Shunde Innovation School, University of Science and Technology Beijing (USTB), Beijing, 100083, China; Zhongzhi International Institute of Agricultural Biosciences, Beijing, 100083, China
| | - Yuchen Qi
- Research Institute of Biology and Agriculture, Shunde Innovation School, University of Science and Technology Beijing (USTB), Beijing, 100083, China
| | - Suowei Wu
- Research Institute of Biology and Agriculture, Shunde Innovation School, University of Science and Technology Beijing (USTB), Beijing, 100083, China; Zhongzhi International Institute of Agricultural Biosciences, Beijing, 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co. Ltd., Beijing, 100192, China.
| | - Xiangyuan Wan
- Research Institute of Biology and Agriculture, Shunde Innovation School, University of Science and Technology Beijing (USTB), Beijing, 100083, China; Zhongzhi International Institute of Agricultural Biosciences, Beijing, 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co. Ltd., Beijing, 100192, China.
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34
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Zhu T, Yang S, Mauro TM, Man MQ. Association of Epidermal Biophysical Properties with Obesity and Its Implications. Skin Pharmacol Physiol 2023; 36:165-173. [PMID: 37640014 DOI: 10.1159/000533587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/04/2023] [Indexed: 08/31/2023]
Abstract
BACKGROUND Obesity is a condition defined by an excess amount of body fat, with body mass index (BMI) of 30 and higher. It is associated with a number of other medical conditions, including insulin resistance, diabetes mellitus, and cardiovascular diseases, as well as dyslipidemia, and it is also associated with several cutaneous disorders such as atopic dermatitis, psoriasis, intertriginous dermatitis, acanthosis nigricans and skin infections. SUMMARY Evidence suggests a link between obesity and epidermal dysfunction. Generally, individuals with obesity display higher transepidermal water loss rate and lower stratum corneum hydration levels, although no association of obesity with epidermal dysfunction has been documented. Results of skin surface pH are controversial. But study demonstrated a positive correlation of BMI with skin surface pH on both the forearm and the shin in males, suggesting that the changes in epidermal function vary with gender in individuals with obesity. KEY MESSAGES This review summarizes the association between obesity and epidermal function, and discusses possible underlying mechanisms. Individuals with obesity exhibit poor epidermal permeability barrier and lower stratum corneum hydration levels. Because of the pathogenic role of compromised epidermal function in inflammation, which is also linked to obesity, improvement in epidermal function could benefit individuals with obesity, particularly those with abnormalities in epidermal function.
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Affiliation(s)
- Tingting Zhu
- Department of Dermatology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Shuyun Yang
- Department of Dermatology, The People's Hospital of Baoshan, Baoshan, China
| | - Theodora M Mauro
- Department of Dermatology, Veterans Affairs Medical Center San Francisco, University of California San Francisco, San Francisco, California, USA
| | - Mao-Qiang Man
- Department of Dermatology, Veterans Affairs Medical Center San Francisco, University of California San Francisco, San Francisco, California, USA
- Dermatology Hospital, Southern Medical University, Guangzhou, China
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35
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Fleming PJ, Correia JJ, Fleming KG. Revisiting macromolecular hydration with HullRadSAS. Eur Biophys J 2023; 52:215-224. [PMID: 36602579 DOI: 10.1007/s00249-022-01627-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 01/06/2023]
Abstract
Hydration of biological macromolecules is important for their stability and function. Historically, attempts have been made to describe the degree of macromolecular hydration using a single parameter over a narrow range of values. Here, we describe a method to calculate two types of hydration: surface shell water and entrained water. A consideration of these two types of hydration helps to explain the "hydration problem" in hydrodynamics. The combination of these two types of hydration allows accurate calculation of hydrodynamic volume and related macromolecular properties such as sedimentation and diffusion coefficients, intrinsic viscosities, and the concentration-dependent non-ideality identified with sedimentation velocity experiments.
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Affiliation(s)
- Patrick J Fleming
- Thomas C. Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - John J Correia
- Department of Cell and Molecular Biology, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Karen G Fleming
- Thomas C. Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, MD, 21218, USA.
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36
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Chen F, Lu J, Yang X, Liu D, Wang Q, Geng X, Xiao B, Zhang J, Liu F, Gu G, Cui W. Different hydration methods for the prevention of contrast-induced nephropathy in patients with elective percutaneous coronary intervention: a retrospective study. BMC Cardiovasc Disord 2023; 23:323. [PMID: 37355592 PMCID: PMC10290803 DOI: 10.1186/s12872-023-03358-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 06/19/2023] [Indexed: 06/26/2023] Open
Abstract
BACKGROUND Hydration is currently the main measure to prevent contrast-induced nephropathy (CIN). We aimed to compare the preventive effect of preprocedure and postprocedure hydration on CIN in patients with coronary heart disease undergoing elective percutaneous coronary intervention (PCI). METHODS A retrospective study included 198 cases of postprocedure hydration and 396 cases of preprocedure hydration using propensity score matching. The incidence of CIN 48 h after PCI and adverse events within 30 days after contrast media exposure were compared between the two groups. Logistic regression analysis was used to analyse the risk factors for CIN. RESULTS The incidence of CIN in the postprocedure hydration group was 3.54%, while that in the preprocedure hydration group was 4.8%. There was no significant difference between the two groups (p = 0.478). Multivariate logistic regression analysis showed that diabetes mellitus, baseline BNP and cystatin C levels, and contrast agent dosage were independent risk factors for CIN. There was no significant difference in the incidence of major adverse events between the two groups (3.03% vs. 2.02%, p = 0.830). CONCLUSIONS Postprocedure hydration is equally effective compared to preoperative hydration in the prevention of CIN in patients with coronary heart disease undergoing elective PCI.
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Affiliation(s)
- Fei Chen
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Jingchao Lu
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Xiuchun Yang
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Demin Liu
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Qian Wang
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Xue Geng
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Bing Xiao
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Jie Zhang
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Fan Liu
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Guoqiang Gu
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China
| | - Wei Cui
- Department of Cardiology, the Second Hospital of Hebei Medical University and the Institute of Cardiocerebrovascular Disease of Hebei Province, Shijiazhuang, 050000, China.
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Lu P, Guo J, Fan J, Wang P, Yan X. Combined effect of konjac glucomannan addition and ultrasound treatment on the physical and physicochemical properties of frozen dough. Food Chem 2023; 411:135516. [PMID: 36696719 DOI: 10.1016/j.foodchem.2023.135516] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 01/02/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023]
Abstract
The effects of dual sequential modification using konjac glucomannan and ultrasound treatments at power densities of 15-37.5 W/L on the hydration, rheology and structural characteristics of frozen dough were investigated in this study. The results revealed that the konjac glucomannan and ultrasound treatments improved the textural properties of frozen dough, but had a negative impact on its viscoelasticity. Furthermore, konjac glucomannan and ultrasound treatments increased the content of free sulfhydryl group and disulfide bond, as well as improved the freeze tolerance of dough. The results exhibited that the enthalpy of frozen dough decreased by 20.42 % compared with the frozen blank control dough under ultrasonic power density of 22.5 W/L. The network structure of frozen dough treated by konjac glucomannan and ultrasound was more ordered and integral than that of frozen blank control dough. These results provide valuable knowledge on the application of konjac glucomannan and ultrasound to frozen wheat-based foods.
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Affiliation(s)
- Peng Lu
- College of Food and Bioengineering, Henan University of Science and Technology, 471023 Luoyang, Henan Province, P.R. China
| | - Jinying Guo
- College of Food and Bioengineering, Henan University of Science and Technology, 471023 Luoyang, Henan Province, P.R. China.
| | - Jiawei Fan
- College of Food and Bioengineering, Henan University of Science and Technology, 471023 Luoyang, Henan Province, P.R. China
| | - Ping Wang
- College of Food and Bioengineering, Henan University of Science and Technology, 471023 Luoyang, Henan Province, P.R. China
| | - Xiang Yan
- College of Food and Bioengineering, Henan University of Science and Technology, 471023 Luoyang, Henan Province, P.R. China
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38
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Jaffri SRF, Scheer H, MacAlister CA. The hydroxyproline O-arabinosyltransferase FIN4 is required for tomato pollen intine development. Plant Reprod 2023; 36:173-191. [PMID: 36749417 DOI: 10.1007/s00497-023-00459-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/20/2023] [Indexed: 06/09/2023]
Abstract
The pollen grain cell wall is a highly specialized structure composed of distinct layers formed through complex developmental pathways. The production of the innermost intine layer, composed of cellulose, pectin and other polymers, is particularly poorly understood. Here we demonstrate an important and specific role for the hydroxyproline O-arabinosyltransferase (HPAT) FIN4 in tomato intine development. HPATs are plant-specific enzymes which initiate glycosylation of certain cell wall structural proteins and signaling peptides. FIN4 was expressed throughout pollen development in both the developing pollen and surrounding tapetal cells. A fin4 mutant with a partial deletion of the catalytic domain displayed significantly reduced male fertility in vivo and compromised pollen hydration and germination in vitro. However, fin4 pollen that successfully germinated formed morphologically normal pollen tubes with the same growth rate as the wild-type pollen. When we examined mature fin4 pollen, we found they were cytologically normal, and formed morphologically normal exine, but produced significantly thinner intine. During intine deposition at the late stages of pollen development we found fin4 pollen had altered polymer deposition, including reduced cellulose and increased detection of pectin, specifically homogalacturonan with both low and high degrees of methylesterification. Therefore, FIN4 plays an important role in intine formation and, in turn pollen hydration and germination and the process of intine formation involves dynamic changes in the developing pollen cell wall.
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Affiliation(s)
- Syeda Roop Fatima Jaffri
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Holly Scheer
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Cora A MacAlister
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, USA.
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39
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Funnell MP, Juett LA, Ferrara R, Mears SA, James LJ. Ad-libitum fluid intake was insufficient to achieve eu hydration 20 h after intermittent running in male team sports athletes. Physiol Behav 2023; 268:114227. [PMID: 37156317 DOI: 10.1016/j.physbeh.2023.114227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/17/2023] [Accepted: 05/05/2023] [Indexed: 05/10/2023]
Abstract
This study documented 20 h rehydration from intermittent running while concealing the primary outcome of rehydration from subjects. Twenty-eight male team sports athletes (age 25 ± 3 y; predicted V̇O2max 54 ± 3 mL∙kg-1∙min-1) were pair-matched to exercise (EX) or rest (REST) groups. To determine hydration status, body mass, urine and blood samples were collected at 08:00, pre-intervention (09:30), post-intervention (12:00), 3 h post-intervention and 08:00 the following morning (20 h). The intervention was 110 min intermittent running (EX) or seated rest (REST), with ad-libitum fluid provided in both. Subjects completed a weighed diet record and collected all urine for the 24 h. Changes typical of hypohydration were apparent in EX following the intervention period (body mass: EX -2.0 ± 0.5%; REST -0.2 ± 0.3%; serum osmolality: EX 293 ± 4 mOsm∙kgH2O-1; REST 287 ± 6 mOsm∙kgH2O-1; P≤0.022). Fluid intake during the intervention period (EX 704 ± 286 mL, REST 343 ± 230 mL) and fluid intake within the first 3 h post-intervention (EX 1081 ± 460 mL, REST 662 ± 230 mL) were greater (P≤0.004), and 24 h urine volume lower (EX 1697 ± 824 mL, REST 2370 ± 842 mL; P=0.039) in EX. Compared to baseline, body mass remained lower (-0.6 ± 0.5%; P=0.030) and urine osmolality elevated (20 h: 844 ± 197 mOsm∙kgH2O-1, 08:00: 698 ± 200 mOsm∙kgH2O-1; P=0.004) at 20 h in EX. When games players drank fluid ad-libitum during exercise and post-exercise in free-living conditions, a small degree of hypohydration remained 20 h post-exercise.
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Affiliation(s)
- Mark P Funnell
- National Centre for Sport, Exercise & Medicine, Loughborough University, Leicestershire, UK, LE11 3TU..
| | - Loris A Juett
- National Centre for Sport, Exercise & Medicine, Loughborough University, Leicestershire, UK, LE11 3TU
| | - Robert Ferrara
- National Centre for Sport, Exercise & Medicine, Loughborough University, Leicestershire, UK, LE11 3TU
| | - Stephen A Mears
- National Centre for Sport, Exercise & Medicine, Loughborough University, Leicestershire, UK, LE11 3TU
| | - Lewis J James
- National Centre for Sport, Exercise & Medicine, Loughborough University, Leicestershire, UK, LE11 3TU
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40
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Wang Y, Zhang Y, He W, Nie D. Effect of phosphate rock acid insoluble residue on hydration process and mechanical properties of α-hemihydrate gypsum. Environ Sci Pollut Res Int 2023; 30:62815-62831. [PMID: 36947372 DOI: 10.1007/s11356-023-26484-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/13/2023] [Indexed: 05/10/2023]
Abstract
The application of α-hemihydrate gypsum (α-HH) is limited by several factors, such as a rapid hydration rate, short setting time, poor water resistance, and high cost. Especially because of the high production cost, although α-HH has excellent mechanical strength, it is rarely used in the field of building materials. In this study, based on the composition characteristics of new industrial solid waste (phosphate-rock acid-insoluble residue, PAIR) and to meet the needs of resource utilization, gypsum matrix composites were prepared by adding PAIR to α-HH to solve the problems of short setting time and poor water resistance of gypsum matrix composites and improve the comprehensive properties of α-HH products. The results show that when the different types of pores formed during the hydration of α-HH were filled with inert substances, such as silicon dioxide, insoluble phosphate, and calcium fluoride from PAIR, the proportion of mesopores in the composite products increased, whereas that of harmful macropores decreased. The compressive and flexural softening coefficients of the PAIR/α-HH system with 23% PAIR were the highest at 57.25 and 60.125%, respectively, and the water resistance of the system was improved; when the content of PAIR reaches 35%, the strength of the composite products decreased from 58.125 to 43.8 MPa. The HPO42- in PAIR partially replaces the SO42- ion in the dihydrate gypsum (DH) lattice to form a Ca(SO4, HPO4)•2H2O double salt, leading to the production of eutectic phosphorus. Soluble F-, Al3+, Mg2+, and phosphorus-containing substances in PAIR form a variety of complex ions in PAIR/α-HH aqueous solution, which are adsorbed onto the surface of the new DH phase; the crystal morphology changed from thick, long columns to clusters, thin rods, and plates, inhibiting the nucleation and growth of DH and changing its crystal growth rate and crystallization behavior. Therefore, the setting time of gypsum is prolonged; when 35% PAIR was added, the induced nucleation period of the PAIR/α-HH system was prolonged from 40 to 265 min, and the final setting time was from 12 to 360 min. By mixing solid waste PAIR, while the setting time of α-HH is prolonged, its water resistance is improved, and its mechanical strength is not significantly reduced, reducing the cost. From the perspective of economy and environmental protection, this study is a way to α-HH is widely used in the field of building materials.
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Affiliation(s)
- Yu Wang
- School of Chemistry and Chemical Engineering, Guizhou University, Guizhou, Guiyang, 550025, People's Republic of China
| | - Yu Zhang
- School of Chemistry and Chemical Engineering, Guizhou University, Guizhou, Guiyang, 550025, People's Republic of China.
| | - Weilong He
- School of Chemistry and Chemical Engineering, Guizhou University, Guizhou, Guiyang, 550025, People's Republic of China
| | - Dengpan Nie
- School of Chemical Engineering, Guizhou Minzu University, Guizhou, Guiyang, 550025, People's Republic of China
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41
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Luo K, Peng K, Li J, Lu Z, Jiang J. Effect mechanism of steel slag on CO 2 capture in hydraulic lime. Environ Sci Pollut Res Int 2023; 30:67582-67595. [PMID: 37118395 DOI: 10.1007/s11356-023-26746-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 03/27/2023] [Indexed: 05/25/2023]
Abstract
Steel slag (SS) inhibits the early hydration of cement, limiting its application in cement-based materials. In this study, SS was used to prepare hydraulic lime (HL), and the effect of SS on CO2 capture in HL was investigated. SS inhibited the carbonation of HL in the early stages but promoted carbonation in the later stages. Adding more than 10% SS inhibited the formation of hydration products, and the reduction of hydration products inhibited the carbonation product content, increased the porosity of the hydration mortar, promoted the later stage carbonation rate, and reduced the compressive strength. The carbonation area and captured CO2 content of the mortars in SS-HL increased exponentially with an increasing carbonation curing age. With an increasing SS content, the carbonation area and the degree of CO2 capture decreased then increased after 1 day and after 3 days of accelerated carbonation curing, respectively.
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Affiliation(s)
- Kai Luo
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Ke Peng
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Jun Li
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China.
| | - Zhongyuan Lu
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Jun Jiang
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
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Steele CN, Nowak KL. Nonpharmacological Management of Autosomal Dominant Polycystic Kidney Disease. Adv Kidney Dis Health 2023; 30:220-227. [PMID: 37088524 DOI: 10.1053/j.akdh.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 04/25/2023]
Abstract
Autosomal dominant polycystic kidney disease is a slowly progressive, lifelong disease characterized by continuous development and enlargement of kidney cysts. Thus, nonpharmacological interventions are crucial in disease management and have the potential for a large clinical impact as standalone interventions or in conjunction with pharmacological therapies. Current potential strategies regarding nonpharmacological management of autosomal dominant polycystic kidney disease include nonpharmacological management of blood pressure, calorie restriction, weight loss or weight management, enhanced hydration, limiting caffeine, dietary sodium restriction, protein restriction or altering the type of protein intake, phosphorus restriction, and reducing net acid load. This brief review discusses the available evidence, including cell culture, animal, epidemiological, and clinical studies, regarding the utility of such strategies in the nonpharmacological management of autosomal dominant polycystic kidney disease. We assert that lifestyle modification strategies should be a critical aspect of the treatment of autosomal dominant polycystic kidney disease, while further trial and mechanistic evidence continue to become available.
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Affiliation(s)
- Cortney N Steele
- Division of Renal Diseases and Hypertension, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Kristen L Nowak
- Division of Renal Diseases and Hypertension, University of Colorado Anschutz Medical Campus, Aurora, CO.
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Weston A, Vladescu SC, Reddyhoff T, Griffiths A, Crouzier T, Fielden M, Garnett JA, Carpenter GH. The influence of ions on the lubricative abilities of mucin and the role of sialic acids. Colloids Surf B Biointerfaces 2023; 227:113327. [PMID: 37172419 DOI: 10.1016/j.colsurfb.2023.113327] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 04/17/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023]
Abstract
Mucus reduces friction between epithelial surfaces by providing lubrication in the boundary and mixed regime. Mucins, the main macromolecule, are heavily glycosylated proteins that polymerise and retain water molecules, resulting in a hydrated biogel. It is assumed that positively charged ions can influence mucin film structure by screening the electrostatic repulsions between the negatively charged glycans on mucin moieties and draw in water molecules via hydration shells. The ionic concentration can vary significantly in different mucus systems and here we show that increasing the ionic concentration in mucin films leads to an increase in lubrication between two polydimethylsiloxane surfaces at sliding contact in a compliant oral mimic. Mucins were found to bind sodium ions in a concentration-dependent manner and increased ionic concentration appears to cause mucin films to swell when assessed by Quartz Crystal hiMicrobalance with Dissipation (QCM-D) analysis. Furthermore, we determined that the removal of negatively charged sialic acid moieties by sialidase digestion resulted in reduced adsorption to hydrophilic surfaces but did not affect the swelling of mucin films with increasing ionic concentrations. Moreover, the coefficient of friction was increased with sialic acid removal, but lubrication was still increased with increasing ionic concentrations. Taken together this suggests that sialic acids are important for lubrication and may exert this through the sacrificial layer mechanism. Ionic concentration appears to influence mucin films and their lubrication, and sialic acids, at least partly, may be important for ion binding.
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Affiliation(s)
- Abby Weston
- Centre for Host Microbiome Interactions, Salivary Research, Faculty of Dentistry, Oral and Craniofacial Science, King's College London, London, UK.
| | - Sorin-Cristian Vladescu
- Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London, UK
| | - Tom Reddyhoff
- Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London, UK
| | - Alex Griffiths
- London Metallomics Facility, King's College London, Waterloo Campus, London, UK
| | - Thomas Crouzier
- Division of Glycoscience, KTH Royal Institute of Technology, Albanova Unversity Centre, Stockholm, Sweden
| | - Matthew Fielden
- Division of Surface and Corrosion Science, KTH Royal Institute of Technology, Albanova University Centre, Stockholm, Sweden
| | - James A Garnett
- Centre for Host Microbiome Interactions, Salivary Research, Faculty of Dentistry, Oral and Craniofacial Science, King's College London, London, UK
| | - Guy H Carpenter
- Centre for Host Microbiome Interactions, Salivary Research, Faculty of Dentistry, Oral and Craniofacial Science, King's College London, London, UK
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Rodger A, Vezevicius A, Papies EK. Can a simple plan change a complex behavior? Implementation intentions in the context of water drinking. Appetite 2023; 183:106459. [PMID: 36646386 DOI: 10.1016/j.appet.2023.106459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/02/2022] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
Underhydration has significant adverse physical and mental health effects, yet many people drink too little water. Implementation intentions have been found to effectively promote many health behaviors, but little is known about the processes underlying their effects in naturalistic settings, and whether they could improve water drinking. This mixed-methods study assessed the impact and potential underlying processes of using implementation intentions to increase self-reported water intake over a five-day follow-up. Ninety-five participants (Mage = 39, SD = 12) received an educational quiz to increase their water drinking motivation before being randomly assigned to the control or intervention group. Participants also completed a qualitative survey that assessed the processes underlying their attempts to increase water intake. Quantitative results suggested that most participants increased their average daily water intake regardless of group. Qualitative results indicated that implementation intention participants struggled with remembering and the perceived effort of preparation and drinking behaviors, which reduced the effect of planning on behavior. This study provides essential theoretical and methodological considerations for researchers studying implementation intentions, as the effects and mechanisms of implementation intentions in real-life situations may be more complex than previously assumed. For example, the results suggest that implementation intentions did not automatize remembering and performing the behavior in ways the current literature theorizes. Other kinds of interventions may be needed to improve the complex daily-life behaviour of water drinking.
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Affiliation(s)
- Amy Rodger
- School of Psychology, Institute of Neuroscience and Psychology, University of Glasgow, UK.
| | - Ariel Vezevicius
- School of Psychology, Institute of Neuroscience and Psychology, University of Glasgow, UK
| | - Esther K Papies
- School of Psychology, Institute of Neuroscience and Psychology, University of Glasgow, UK
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Guidugli S, Villegas M, Benegas J, Donati I, Paoletti S. Solvation and expansion of neutral and charged chains of a carbohydrate polyelectrolyte: Galacturonan in water. A critical revisiting. Biophys Chem 2023; 295:106960. [PMID: 36806954 DOI: 10.1016/j.bpc.2023.106960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/13/2023] [Accepted: 01/19/2023] [Indexed: 02/05/2023]
Abstract
Experimental and theoretical data have been revisited to shed light onto the aspects of hydration and chain expansion of pectic acid (galacturonan) upon charging. The prediction of the variation of the number of solvation water molecules between the two limit ionization states from theoretical calculations was confirmed to a very high accuracy by the corresponding number evaluated form dilatometric measurements. The relevance of hydration to the mechanism of bonding of calcium ions by sodium pectate is discussed. Characterization of polymer expansion has been obtained by calculating the values of the characteristic ratio and/or the persistence length on the respective populations and comparing the theoretical predictions with experimental data. The results show that a charged chain in typical conditions of ionic strength is more expanded than its neutral counterpart, whereas the ideal limit (31 and 21) helical conformations in the uncharged and totally charged conditions, respectively, share the same value of the linear advance of the helical repeat, when the ionic strength tends to infinite. Total divergence between theoretical predictions and experimental evidence rules out the possibility that carboxylate charge reduction by protonation and by methyl esterification are equivalent in determining the solution behavior of galacturonan.
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Affiliation(s)
- Silvina Guidugli
- Instituto de Matemática Aplicada San Luis (IMASL), Departamento de Física, Universidad Nacional de San Luis, CONICET, Ejército De Los Andes 950, 5700 San Luis, Argentina
| | - Myriam Villegas
- Instituto de Matemática Aplicada San Luis (IMASL), Departamento de Física, Universidad Nacional de San Luis, CONICET, Ejército De Los Andes 950, 5700 San Luis, Argentina
| | - Julio Benegas
- Instituto de Matemática Aplicada San Luis (IMASL), Departamento de Física, Universidad Nacional de San Luis, CONICET, Ejército De Los Andes 950, 5700 San Luis, Argentina
| | - Ivan Donati
- Dipartimento di Scienze della Vita, Università degli Studi di Trieste, I-34127 Trieste, Italy.
| | - Sergio Paoletti
- Dipartimento di Scienze della Vita, Università degli Studi di Trieste, I-34127 Trieste, Italy
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Greenwood MP, Greenwood M, Bárez-López S, Hawkins JW, Short K, Tatovic D, Murphy D. Osmoadaptive GLP-1R signalling in hypothalamic neurones inhibits antidiuretic hormone synthesis and release. Mol Metab 2023; 70:101692. [PMID: 36773648 PMCID: PMC9969259 DOI: 10.1016/j.molmet.2023.101692] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/01/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
OBJECTIVES The excessive release of the antidiuretic hormone vasopressin is implicated in many diseases including cardiovascular disease, diabetes, obesity, and metabolic syndrome. Once thought to be elevated as a consequence of diseases, data now supports a more causative role. We have previously identified CREB3L1 as a transcription factor that co-ordinates vasopressin synthesis and release in the hypothalamus. The objective here was to identify mechanisms orchestrated by CREB3L1 that co-ordinate vasopressin release. METHODS We mined Creb3l1 knockdown SON RNA-seq data to identify downstream target genes. We proceeded to investigate the expression of these genes and associated pathways in the supraoptic nucleus of the hypothalamus in response to physiological and pharmacological stimulation. We used viruses to selectively knockdown gene expression in the supraoptic nucleus and assessed physiological and metabolic parameters. We adopted a phosphoproteomics strategy to investigate mechanisms that facilitate hormone release by the pituitary gland. RESULTS We discovered glucagon like peptide 1 receptor (Glp1r) as a downstream target gene and found increased expression in stimulated vasopressin neurones. Selective knockdown of supraoptic nucleus Glp1rs resulted in decreased food intake and body weight. Treatment with GLP-1R agonist liraglutide decreased vasopressin synthesis and release. Quantitative phosphoproteomics of the pituitary neurointermediate lobe revealed that liraglutide initiates hyperphosphorylation of presynapse active zone proteins that control vasopressin exocytosis. CONCLUSION In summary, we show that GLP-1R signalling inhibits the vasopressin system. Our data advises that hydration status may influence the pharmacodynamics of GLP-1R agonists so should be considered in current therapeutic strategies.
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Affiliation(s)
- Michael P Greenwood
- Molecular Neuroendocrinology Research Group, Bristol Medical School: Translational Health Sciences, University of Bristol, Dorothy Hodgkin Building, Bristol, United Kingdom.
| | - Mingkwan Greenwood
- Molecular Neuroendocrinology Research Group, Bristol Medical School: Translational Health Sciences, University of Bristol, Dorothy Hodgkin Building, Bristol, United Kingdom
| | - Soledad Bárez-López
- Molecular Neuroendocrinology Research Group, Bristol Medical School: Translational Health Sciences, University of Bristol, Dorothy Hodgkin Building, Bristol, United Kingdom
| | - Joe W Hawkins
- Molecular Neuroendocrinology Research Group, Bristol Medical School: Translational Health Sciences, University of Bristol, Dorothy Hodgkin Building, Bristol, United Kingdom
| | - Katherine Short
- Molecular Neuroendocrinology Research Group, Bristol Medical School: Translational Health Sciences, University of Bristol, Dorothy Hodgkin Building, Bristol, United Kingdom
| | - Danijela Tatovic
- Diabetes and Endocrinology Department, North Bristol NHS Trust, Bristol, United Kingdom
| | - David Murphy
- Molecular Neuroendocrinology Research Group, Bristol Medical School: Translational Health Sciences, University of Bristol, Dorothy Hodgkin Building, Bristol, United Kingdom
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Adams WM, Zaplatosch ME, Glenn SE, Butts CL, Scarneo-Miller SE. Characterizing fluid intake and physical activity in university students within the United States during the COVID-19 pandemic. Eur J Nutr 2023; 62:1165-1184. [PMID: 36449091 PMCID: PMC9709366 DOI: 10.1007/s00394-022-03058-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 11/16/2022] [Indexed: 12/02/2022]
Abstract
PURPOSE This study determined fluid intake and physical activity behaviors among college students during the COVID-19 pandemic. METHODS College students (n = 1014; females, 75.6%) completed an online survey during the Spring 2020 academic semester following the initial global response to the COVID-19 pandemic. Academic standing, habitation situation, and University/College responses to COVID-19 were collected. Participants completed the Godin Leisure-Time Exercise Questionnaire and a 15-item Beverage Questionnaire (BEVQ-15) to determine physical activity level and fluid intake behaviors, respectively. RESULTS Females (1920 ± 960 mL) consumed significantly less fluid than males (2400 ± 1270 mL, p < 0.001). Living off-campus (p < 0.01) and living with a spouse/partner (p < 0.01) was associated with increased consumption of alcoholic beverages. 88.7% of participants reported being at least moderately active; however, Black/African American and Asian participants were more likely to be less active than their Caucasian/White counterparts (p < 0.05). Participants reporting no change in habitation in response to COVID-19 had a higher fluid intake (p = 0.002); however, the plain water consumption remained consistent (p = 0.116). While there was no effect of habitation or suspension of classes on physical activity levels (p > 0.05), greater self-reported physical activity was associated with greater fluid intake (std. β = 0.091, p = 0.003). CONCLUSIONS Fluid intake among college students during the initial response to the COVID-19 pandemic approximated current daily fluid intake recommendations. Associations between COVID-19-related disruptions (i.e., suspension of classes and changes in habitation) and increased alcohol intake are concerning and may suggest the need for the development of targeted strategies and programming to attenuate the execution of negative health-related behaviors in college students.
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Affiliation(s)
- William M Adams
- Division of Sports Medicine, United States Olympic & Paralympic Committee, 1 Olympic Plaza, Colorado Springs, CO, 80909, USA.
- United States Coalition for the Prevention of Illness and Injury in Sport, Colorado Springs, CO, USA.
- Hydration, Environment, and Thermal Stress Lab, Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC, USA.
| | - Mitchell E Zaplatosch
- Hydration, Environment, and Thermal Stress Lab, Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Shaylynn E Glenn
- Department of Exercise and Nutrition Sciences, Weber State University, Ogden, UT, USA
| | - Cory L Butts
- Department of Exercise and Nutrition Sciences, Weber State University, Ogden, UT, USA
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Cao YQ, Wang YX, Zhao Y, Zhang J, He X, Xie P, Chen J, Sun YH, Chen J, Sun YH. Transfer of the zp3a gene results in changes in egg adhesiveness and buoyancy in transgenic zebrafish. Zool Res 2023; 44:259-268. [PMID: 36650065 PMCID: PMC10083224 DOI: 10.24272/j.issn.2095-8137.2022.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Reproductive strategies and spawning habits play key roles in the evolution of endemic East Asian cyprinids. However, the molecular mechanisms underlying the regulation of spawning habits are not well understood. We recently identified zona pellucida (Zp) as the top differentially expressed protein between East Asian cyprinids that produce adhesive and semi-buoyant eggs, suggesting that Zp protein may play important roles in the regulation of egg type. In this work, we generated transgenic zebrafish in which oocyte-specific expression of zp genes from rare minnow ( Gobiocypris rarus), an East Asian cyprinid laying adhesive eggs, was driven by a zebrafish zp3.2 gene promoter. We found that the transgenic eggs obtained partial adhesiveness and exhibited alteration in hydration and buoyancy. Abnormal metabolism of vitellogenin (VTG) may contribute to enhanced hydration and/or buoyancy. Our work shows that expression of the exogenous zp3a gene from an adhesive-egg producing fish is sufficient to induce changes in both egg adhesiveness and buoyancy in zebrafish, emphasizing the important role of zp genes in the regulation of spawning habits. Our results thus provide new insights into how endemic East Asian cyprinids may have adapted to the Yangtze river-lake system via changes in spawning habits.
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Affiliation(s)
- Yu-Qing Cao
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong-Xin Wang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Zhao
- University of Chinese Academy of Sciences, Beijing 100049, China.,Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
| | - Jia Zhang
- University of Chinese Academy of Sciences, Beijing 100049, China.,Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
| | - Xian He
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ping Xie
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
| | - Jun Chen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China. E-mail:
| | - Yu-Hua Sun
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China.,Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100049, China.,University of Chinese Academy of Sciences, Beijing 100049, China. E-mail:
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Nishi SK, Babio N, Paz-Graniel I, Serra-Majem L, Vioque J, Fitó M, Corella D, Pintó X, Bueno-Cavanillas A, Tur JA, Diez-Ricote L, Martinez JA, Gómez-Martínez C, González-Botella A, Castañer O, Alvarez-Sala A, Montesdeoca-Mendoza C, Fanlo-Maresma M, Cano-Ibáñez N, Bouzas C, Daimiel L, Zulet MÁ, Sievenpiper JL, Rodriguez KL, Vázquez-Ruiz Z, Salas-Salvadó J. Water intake, hydration status and 2-year changes in cognitive performance: a prospective cohort study. BMC Med 2023; 21:82. [PMID: 36882739 DOI: 10.1186/s12916-023-02771-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 02/06/2023] [Indexed: 03/09/2023] Open
Abstract
BACKGROUND Water intake and hydration status have been suggested to impact cognition; however, longitudinal evidence is limited and often inconsistent. This study aimed to longitudinally assess the association between hydration status and water intake based on current recommendations, with changes in cognition in an older Spanish population at high cardiovascular disease risk. METHODS A prospective analysis was conducted of a cohort of 1957 adults (aged 55-75) with overweight/obesity (BMI between ≥ 27 and < 40 kg/m2) and metabolic syndrome from the PREDIMED-Plus study. Participants had completed bloodwork and validated, semiquantitative beverage and food frequency questionnaires at baseline, as well as an extensive neuropsychological battery of 8 validated tests at baseline and 2 years of follow-up. Hydration status was determined by serum osmolarity calculation and categorized as < 295 mmol/L (hydrated), 295-299.9 mmol/L (impending dehydration), and ≥ 300 mmol/L (dehydrated). Water intake was assessed as total drinking water intake and total water intake from food and beverages and according to EFSA recommendations. Global cognitive function was determined as a composite z-score summarizing individual participant results from all neuropsychological tests. Multivariable linear regression models were fitted to assess the associations between baseline hydration status and fluid intake, continuously and categorically, with 2-year changes in cognitive performance. RESULTS The mean baseline daily total water intake was 2871 ± 676 mL/day (2889 ± 677 mL/day in men; 2854 ± 674 mL/day in women), and 80.2% of participants met the ESFA reference values for an adequate intake. Serum osmolarity (mean 298 ± 24 mmol/L, range 263 to 347 mmol/L) indicated that 56% of participants were physiologically dehydrated. Lower physiological hydration status (i.e., greater serum osmolarity) was associated with a greater decline in global cognitive function z-score over a 2-year period (β: - 0.010; 95% CI - 0.017 to - 0.004, p-value = 0.002). No significant associations were observed between water intake from beverages and/or foods with 2-year changes in global cognitive function. CONCLUSIONS Reduced physiological hydration status was associated with greater reductions in global cognitive function over a 2-year period in older adults with metabolic syndrome and overweight or obesity. Future research assessing the impact of hydration on cognitive performance over a longer duration is needed. TRIAL REGISTRATION International Standard Randomized Controlled Trial Registry, ISRCTN89898870. Retrospectively registered on 24 July 2014.
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50
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Shokouhinejad N, Tahun IA, Tahan SS, Mohandes F, Nekoofar MH, Dummer PMH. Microstructure and color stability of calcium silicate-based dental materials exposed to blood or platelet-rich fibrin. Clin Oral Investig 2023; 27:1193-1206. [PMID: 36585527 DOI: 10.1007/s00784-022-04733-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 10/01/2022] [Indexed: 01/01/2023]
Abstract
OBJECTIVES To investigate the effects of blood and platelet-rich fibrin (PRF), commonly used scaffolds in regenerative endodontic treatment (RET), on the hydration, microstructure, and color stability of three hydraulic calcium silicate cements (HCSCs), OrthoMTA, RetroMTA, and TotalFill-BC-RRM. MATERIALS AND METHODS The HCSCs were prepared and placed into polyethylene molds and transferred to Eppendorf tubes containing PRF, blood, or PBS and then incubated for 1 week or 1 month. The microstructure and hydration of the cements were studied by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The chromatic alteration of materials was also measured using a spectrophotometer. The data for color stability were analyzed using 2-way analysis of variance and Tukey post hoc tests. RESULTS There was no significant difference between the color stability of cements exposed to PBS (p > 0.05). The chromatic alteration of cements exposed to blood was significantly greater than those exposed to PRF and PBS (p < 0.001). In the presence of blood and PRF, the color change of OrthoMTA was significantly greater than that of RetroMTA and TotalFill (p < 0.05), with no significant difference between RetroMTA and TotalFill (p > 0.05). XRD analysis of all cements revealed a calcium hydroxide peak after 1-week and 1-month exposure to the media; however, OrthoMTA and TotalFill exposed to blood and PRF for 1 month showed weaker calcium hydroxide peaks. SEM images revealed cements exposed to PBS had a different surface microstructure compared to those exposed to blood and PRF. Furthermore, the surface microstructure of HCSCs was influenced by the type of cement radiopacifier (bismuth oxide or zirconium oxide). EDS analysis of the elemental composition in all groups displayed peaks of Ca, O, C, Si, P, and Al. CONCLUSIONS Color stability, hydration behavior, and microstructure of HCSCs were affected by exposure to PRF and blood and the type of cement radiopacifier. CLINICAL RELEVANCE As some important physicochemical properties of HCSCs could be influenced by the environmental conditions and the type of radiopacifier, alternatives to blood clot and HCSCs containing substitutes for bismuth oxide might be more suitable in RETs.
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Affiliation(s)
- Noushin Shokouhinejad
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Ibrahim Abu Tahun
- Department of Conservative Dentistry, School of Dentistry, The University of Jordan, Amman, Jordan
| | - Shima Saber Tahan
- Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Mohandes
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Mohammad H Nekoofar
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. .,Department of Tissue Engineering & Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran. .,Department of Endodontic, Bahçeşehir University School of Dentistry, Istanbul, Turkey.
| | - Paul M H Dummer
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
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