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Qin Y, Xiao D, Gao X, Zhang X, Xu Y. Nanocubic cobalt-containing Prussian blue analogue-derived carbon-coated CoFe alloy nanoparticles for noninvasive uric acid sensing. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2496-2504. [PMID: 38578053 DOI: 10.1039/d4ay00121d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
This work describes an electrochemical sensor for the fast noninvasive detection of uric acid (UA) in saliva. The sensing material was based on a cobalt-containing Prussian blue analogue (Na2-xCo[Fe(CN)6]1-y, PCF). By optimizing the ratio of Co and Fe as 1.5 : 1 in PCF (PCF1.5,0), particles with a regular nanocubic morphology were formed. The calcination of PCF1.5,0 produced a carbon-coated CoFe alloy (CCF1.5), which possessed abundant defects and achieved an excellent electrochemical performance. Subsequently, CCF1.5 was modified on a screen-printed carbon electrode (SPCE) to fabricate the electrochemical sensor, CCF1.5/SPCE, which showed a sensitive and selective response toward salivary UA owing to its good conductivity, sufficient surface active sites and efficient catalytic activity. The determination of UA in artificial saliva achieved the wide linear range of 40 nM-30 μM and the low limit of detection (LOD) of 15.3 nM (3σ/s of 3). The performances of the sensor including its reproducibility, stability and selectivity were estimated to be satisfactory. The content of UA in human saliva was determined and the recovery was in the range of 98-107% and the total RSD was 4.14%. The results confirmed the reliability of CCF1.5/SPCE for application in noninvasive detection.
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Affiliation(s)
- Yunting Qin
- School of Pharmacy, Chengdu University, No. 2025, Chengluo Avenue, Chengdu, P. R. China
| | - Dan Xiao
- Institute of Advanced Study, Chengdu University, No. 2025, Chengluo Avenue, Chengdu, P. R. China.
- College of Chemical Engineering, Sichuan University, No. 29 Wangjiang Road, Chengdu, P. R. China.
| | - Xilan Gao
- College of Food and Bioengineering, Chengdu University, No. 2025, Chengluo Avenue, Chengdu, P. R. China
| | - Xicui Zhang
- Sichuan Institute of Product Quality Supervision & Inspection, No. 16, Xinmao Street, Chengdu, China.
| | - Yanxue Xu
- Institute of Advanced Study, Chengdu University, No. 2025, Chengluo Avenue, Chengdu, P. R. China.
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Schwarz C, Balean O, Dumitrescu R, Ciordas PD, Marian C, Georgescu M, Bolchis V, Sava-Rosianu R, Fratila AD, Alexa I, Jumanca D, Galuscan A. Total Antioxidant Capacity of Saliva and Its Correlation with pH Levels among Dental Students under Different Stressful Conditions. Diagnostics (Basel) 2023; 13:3648. [PMID: 38132232 PMCID: PMC10743087 DOI: 10.3390/diagnostics13243648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/08/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023] Open
Abstract
(1) Background: This cross-sectional study conducted at the Faculty of Dental Medicine, Timisoara, Romania, between December 2022 and February 2023 aims to assess salivary total antioxidant capacity and pH levels in dental students experiencing non-stressful and stressful situations and explore potential correlations between these factors. (2) Methods: Saliva samples were collected during two different periods: before an Oral Health course and before the Oral Health exam, under stressful conditions. Ethical principles were followed, and informed consent was obtained. Data on age, gender, health status, drug use, smoking habits, and anxiety levels were recorded. Saliva was collected using the draining method and pH was measured using indicator paper strips. Total antioxidant capacity (TAC) was determined using a commercial assay kit. Statistical analysis involved descriptive statistics, Student's t-test to compare pH and TAC between study groups, and Pearson's correlation coefficient to analyze the correlation between salivary pH and TAC within each group, with p < 0.05 indicating significance. (3) Results: This study involved 80 participants, comprising 26 males and 54 females, all enrolled in the 5th year of the Oral Health course, with ages ranging from 20 to 53 and a mean age of 23.62 (±4.19) years. Pearson's correlation results show a statistically significant negative relationship between the STAI test and TAC during the stress-free period (-0.02 **, N = 80, p < 0.01). (4) Conclusions: There are variations in saliva's antioxidant capacity in response to different stress conditions. Dental students experienced a higher level of stress before academic assessments compared to the non-stress period during the course.
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Affiliation(s)
- Christoph Schwarz
- Translational and Experimental Clinical Research Centre in Oral Health, Department of Preventive, Community Dentistry and Oral Health, University of Medicine and Pharmacy “Victor Babes”, 300040 Timisoara, Romania; (C.S.); (O.B.); (R.D.); (V.B.); (D.J.); (A.G.)
| | - Octavia Balean
- Translational and Experimental Clinical Research Centre in Oral Health, Department of Preventive, Community Dentistry and Oral Health, University of Medicine and Pharmacy “Victor Babes”, 300040 Timisoara, Romania; (C.S.); (O.B.); (R.D.); (V.B.); (D.J.); (A.G.)
- Clinic of Preventive, Community Dentistry and Oral Health, Department I, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Sq. no 2, 300041 Timisoara, Romania
| | - Ramona Dumitrescu
- Translational and Experimental Clinical Research Centre in Oral Health, Department of Preventive, Community Dentistry and Oral Health, University of Medicine and Pharmacy “Victor Babes”, 300040 Timisoara, Romania; (C.S.); (O.B.); (R.D.); (V.B.); (D.J.); (A.G.)
- Clinic of Preventive, Community Dentistry and Oral Health, Department I, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Sq. no 2, 300041 Timisoara, Romania
| | - Paula Diana Ciordas
- Department of Biochemistry and Pharmacology, Victor Babeş University of Medicine and Pharmacy, Pta Eftimie Murgu Nr. 2, 300041 Timisoara, Romania; (P.D.C.); (C.M.)
| | - Catalin Marian
- Department of Biochemistry and Pharmacology, Victor Babeş University of Medicine and Pharmacy, Pta Eftimie Murgu Nr. 2, 300041 Timisoara, Romania; (P.D.C.); (C.M.)
| | - Marius Georgescu
- Functional Sciences Department, Physiology Discipline, Victor Babes University of Medicine and Pharmacy of Timisoara, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania;
| | - Vanessa Bolchis
- Translational and Experimental Clinical Research Centre in Oral Health, Department of Preventive, Community Dentistry and Oral Health, University of Medicine and Pharmacy “Victor Babes”, 300040 Timisoara, Romania; (C.S.); (O.B.); (R.D.); (V.B.); (D.J.); (A.G.)
| | - Ruxandra Sava-Rosianu
- Translational and Experimental Clinical Research Centre in Oral Health, Department of Preventive, Community Dentistry and Oral Health, University of Medicine and Pharmacy “Victor Babes”, 300040 Timisoara, Romania; (C.S.); (O.B.); (R.D.); (V.B.); (D.J.); (A.G.)
- Clinic of Preventive, Community Dentistry and Oral Health, Department I, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Sq. no 2, 300041 Timisoara, Romania
| | - Aurora Doris Fratila
- Faculty of Dental Medicine, Ludwig-Maximilian-University Munich, Goethestraße 70, 80336 München, Germany;
| | - Iulia Alexa
- Department of Dentistry, Faculty of Dental Medicine, “Vasile Goldis” Western University of Arad, 310045 Arad, Romania;
| | - Daniela Jumanca
- Translational and Experimental Clinical Research Centre in Oral Health, Department of Preventive, Community Dentistry and Oral Health, University of Medicine and Pharmacy “Victor Babes”, 300040 Timisoara, Romania; (C.S.); (O.B.); (R.D.); (V.B.); (D.J.); (A.G.)
- Clinic of Preventive, Community Dentistry and Oral Health, Department I, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Sq. no 2, 300041 Timisoara, Romania
| | - Atena Galuscan
- Translational and Experimental Clinical Research Centre in Oral Health, Department of Preventive, Community Dentistry and Oral Health, University of Medicine and Pharmacy “Victor Babes”, 300040 Timisoara, Romania; (C.S.); (O.B.); (R.D.); (V.B.); (D.J.); (A.G.)
- Clinic of Preventive, Community Dentistry and Oral Health, Department I, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Sq. no 2, 300041 Timisoara, Romania
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Kanchibhotla D, Ingole S, Kulkarni S, Saisudha B. Impact of Sudarshan Kriya Yoga on Salivary pH: An Exploratory Pilot Study. Complement Med Res 2021; 28:478-481. [PMID: 33735857 DOI: 10.1159/000515139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 02/05/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Saliva is increasingly used as a diagnostic tool as it is non-invasive, easily accessible, and less stressful compared to blood sampling. Saliva has a vital role in maintaining oral health. It is necessary for the salivary pH to be neutral in the oral cavity for the optimal functioning of its components. Stress has an effect on salivary pH. OBJECTIVE To study the effect of a mind-body intervention like Sudarshan Kriya yoga (SKY) on the salivary pH. METHODS AND MATERIALS An exploratory pilot study involving an open trial on 321 healthy individuals who were novice to SKY was conducted. The salivary pH was measured before and after a single 90-min session of SKY. RESULTS The salivary pH continued to be neutral after the intervention in the group that had initial neutral pH. There was a statistically significant shift of pH towards neutral in both the groups that had either acidic or alkaline pH initially. CONCLUSION Mind-body interventions like SKY modulate the salivary pH to bring it to the range of optimal functioning. This pilot study provides information for future long-term studies that can be implemented with measures of anxiety and stress along with measuring other salivary biomarkers.
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Affiliation(s)
| | - Sumeet Ingole
- Sri Sri Institute for Advanced Research, Bengaluru, India
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Park J, Ross A, Klagholz SD, Bevans MF. The Role of Biomarkers in Research on Caregivers for Cancer Patients: A Scoping Review. Biol Res Nurs 2017; 20:300-311. [PMID: 29130313 DOI: 10.1177/1099800417740970] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Biomarkers can be used as prognostic, predictive, or monitoring indicators of an associated outcome. The purpose of this review was to provide a comprehensive summary of the research examining the use of biomarkers as surrogate end points for clinical outcomes in family caregivers for cancer patients, identify gaps, and make recommendations for future research. METHODS A scoping review, a process of mapping the existing literature, was conducted. Studies comparing biomarkers across caregivers and controls and/or examining relationships between biomarkers and psychological health were reviewed. RESULTS The studies ( N = 18) of caregivers for cancer patients who were identified used biomarkers to predict outcomes ( n = 13) and to monitor the efficacy of interventions ( n = 6). Biomarkers were divided into two categories based on physiological systems involved: (1) neuroendocrine function (sympathetic-adrenal-medullary axis activity, hypothalamic-pituitary-adrenal axis activity) and (2) immune function. Predictive biomarkers were sensitive to differences between caregivers and controls. The biomarkers were used to evaluate outcomes frequently associated with stress, depression, and anxiety. Cortisol was the biomarker most commonly measured to monitor the efficacy of interventions. DISCUSSION Biomarkers are most commonly incorporated into caregiver studies to predict group membership and psychological health. Neuroendocrine biomarkers, specifically cortisol, are most frequently assessed. Future research should include biomarkers of other physiologic functions (e.g., cardiovascular function, cognitive dysfunction, and cell aging) and those that serve as multisystem indicators. Expanding the scientific study of biomarkers will contribute to our understanding of the mechanisms through which stress may influence caregiver health.
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Affiliation(s)
- Jumin Park
- 1 National Institutes of Health Clinical Center, Bethesda, MD, USA
| | - Alyson Ross
- 1 National Institutes of Health Clinical Center, Bethesda, MD, USA
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Saliva pH as a biomarker of exam stress and a predictor of exam performance. J Psychosom Res 2014; 77:420-5. [PMID: 25439341 DOI: 10.1016/j.jpsychores.2014.07.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 07/01/2014] [Accepted: 07/04/2014] [Indexed: 11/20/2022]
Abstract
BACKGROUND Salivary pH is regulated by the sympathetic and parasympathetic nervous system; therefore, it may serve as a biomarker of stress. AIMS To assess the associations between the cognitive and emotional dimensions of exam stress and pH levels, and the predictability of salivary pH in relation to test performance. METHODS A prospective study. Eighty-three nursing students answered a questionnaire on stress appraisals, experienced stress, test anxiety (including worry and emotionality subscales) and health behaviors, and gave a saliva sample for measuring pH on the morning of their first term exam and three months later. Their performance on the test (grades) was also recorded. RESULTS Levels of pH in saliva were higher (levels of acidity were lower) in the post exam compared to the exam period, in parallel to lower threat appraisal, experienced stress, and test anxiety levels post exam. Controlling for smoking, physical activity and working hours per week, pH levels at both time points were predicted by appraised threat regarding the exam situation, experienced stress, and the emotionality dimension of test anxiety. pH at Time 1 predicted performance on the exams and mediated the associations of experienced stress and emotionality subscale with test performance. CONCLUSIONS the present study indicates that pH levels may serve as a reliable, accessible and inexpensive means by which to assess the degree of physiological reactions to exams and other naturalistic stressors.
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