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Ciftci H, Gul HF, Sahin L, Dolanbay T, Canacik O, Karsli E, Ercin D, Karapehlivan M. Serum myeloperoxidase, paraoxonase, and plasma asprosin concentrations in patients with acute myocardial infarction. Heliyon 2024; 10:e29465. [PMID: 38665586 PMCID: PMC11043935 DOI: 10.1016/j.heliyon.2024.e29465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 04/02/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
Introduction The objective of this study was to evaluate the usefulness of the serum biomarkers myeloperoxidase (MPO), paraoxonase (PON), and plasma asprosin in acute myocardial infarction (AMI) diagnosis and assess their compatibility with routinely screened cardiac biomarkers. Methods This study was conducted using a prospective cross-sectional design and included 90 patients, consisting of 60 patients diagnosed with AMI (30 with ST-segment elevation and 30 with non-ST-segment elevation on ECG) and 30 controls (without a diagnosis of AMI). Changes in the levels of cardiac biomarkers (Hs-cTnI, CK, CK-MB), lipid profile (TC, TG, LDL, HDL), MPO, PON, asprosin, and routine biochemical parameters of patients were evaluated. Furthermore, receiver operating characteristic curve analysis revealed the diagnostic value of Hs-cTnI, MPO, PON, and asprosin in predicting AMI. Binary logistic regression analysis of cardiac marker concentrations was used to predict the presence of AMI. In contrast, multinomial logistic regression analysis was conducted to predict the type of AMI and the control group. Results The median levels of MPO and plasma asprosin were found to be higher in the patient group (3.22 [interquartile range {IQR}: 2.4-4.4] ng/ml and 10.84 [IQR: 8.8-17.8] ng/ml, respectively) than in the control group (2.49 [IQR: 1.9-2.9] ng/ml and 4.82 [IQR: 4.6-8.0] ng/ml, respectively) (p = 0.001 and p < 0.001, respectively). The median levels of PON were 8.94 (IQR: 7.6-10.4) ng/ml in the patient group and 10.44 (IQR: 9.1-20.0) ng/ml in the control group (p < 0.001). In the binary logistic regression model, compared with the control group, a 1 ng/ml increase in MPO level increased the odds of having AMI by 3.61 (p = 0.041, 95% CI: 1.055-12.397), whereas a 1 ng/ml increase in asprosin level increased the odds of having AMI by 2.33 (p < 0.001, 95% CI: 1.479-3.683). In the multinominal logistic regression model, compared with the control group, a 1 ng/ml increase in the MPO level increased the odds of having NSTEMI by 4.14 (p = 0.025, 95% CI: 1.195-14.350), whereas a 1 ng/ml increase in asprosin concentrations increased the odds of having NSTEMI by 2.35 (p < 0.001, 95% CI: 1.494-3.721). Conclusion Herein, MPO and asprosin concentrations increased with Hs-cTnI, and a decrease in PON concentration indicated that oxidant-antioxidant parameters and adipokines were related to AMI pathogenesis.
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Affiliation(s)
- Handan Ciftci
- Department of Emergency Medicine, University of Health Sciences, Bursa Yuksek İhtisas Training and Research Hospital, Bursa, Turkey
| | - Huseyin Fatih Gul
- Department of Biochemistry, Kafkas University, Faculty of Medicine, Kars, Turkey
| | - Levent Sahin
- Department of Emergency Medicine, Kafkas University, Faculty of Medicine, Kars, Turkey
| | - Turgut Dolanbay
- Department of Emergency Medicine, Omer Halis Demir University Medical School, University Research and Education Hospital, Nigde, Turkey
| | - Omer Canacik
- Department of Emergency Medicine, Dokuz Eylul University, School of Medicine, Izmir, Turkey
| | - Emre Karsli
- Department of Emergency Medicine, Bakircay University Cigli Training and Research Hospital, Izmir, Turkey
| | - Dogan Ercin
- Occupational Safety and Health, Ford Otosan Golcuk Company, Kocaeli, Turkey
| | - Mahmut Karapehlivan
- Department of Biochemistry, Kafkas University, Faculty of Medicine, Kars, Turkey
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2
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Guerrero-Flores GN, Pacheco FJ, Boskovic DS, Pacheco SOS, Zhang G, Fraser GE, Miles FL. Sialic acids Neu5Ac and KDN in adipose tissue samples from individuals following habitual vegetarian or non-vegetarian dietary patterns. Sci Rep 2023; 13:12593. [PMID: 37537165 PMCID: PMC10400564 DOI: 10.1038/s41598-023-38102-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 06/30/2023] [Indexed: 08/05/2023] Open
Abstract
Sialic acids (Sias) are a class of sugar molecules with a parent nine-carbon neuraminic acid, generally present at the ends of carbohydrate chains, either attached to cellular surfaces or as secreted glycoconjugates. Given their position and structural diversity, Sias modulate a wide variety of biological processes. However, little is known about the role of Sias in human adipose tissue, or their implications for health and disease, particularly among individuals following different dietary patterns. The goal of this study was to measure N-Acetylneuraminic acid (Neu5Ac), N-Glycolylneuraminic acid (Neu5Gc), and 2-keto-3-deoxy-D-glycero-D-galacto-nononic acid (KDN) concentrations in adipose tissue samples from participants in the Adventist Health Study-2 (AHS-2) and to compare the abundance of these Sias in individuals following habitual, long-term vegetarian or non-vegetarian dietary patterns. A method was successfully developed for the extraction and detection of Sias in adipose tissue. Sias levels were quantified in 52 vegans, 56 lacto-vegetarians, and 48 non-vegetarians using LC-MS/MS with Neu5Ac-D-1,2,3-13C3 as an internal standard. Dietary groups were compared using linear regression. Vegans and lacto-ovo-vegetarians had significantly higher concentrations of Neu5Ac relative to non-vegetarians. While KDN levels tended to be higher in vegans and lacto-ovo-vegetarians, these differences were not statistically significant. However, KDN levels were significantly inversely associated with body mass index. In contrast, Neu5Gc was not detected in human adipose samples. It is plausible that different Neu5Ac concentrations in adipose tissues of vegetarians, compared to those of non-vegetarians, reflect a difference in the baseline inflammatory status between the two groups. Epidemiologic studies examining levels of Sias in human adipose tissue and other biospecimens will help to further explore their roles in development and progression of inflammatory conditions and chronic diseases.
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Affiliation(s)
- Gerardo N Guerrero-Flores
- Interdisciplinary Center for Research in Health and Behavioral Sciences, School of Medicine, Universidad Adventista del Plata, 3103, Libertador San Martín, Entre Ríos, Argentina
- Faculty of Medical Sciences, Universidad Nacional de Rosario (UNR), 3100, Rosario, Argentina
| | - Fabio J Pacheco
- Interdisciplinary Center for Research in Health and Behavioral Sciences, School of Medicine, Universidad Adventista del Plata, 3103, Libertador San Martín, Entre Ríos, Argentina
- Institute for Food Science and Nutrition, Universidad Adventista del Plata, 3103, Libertador San Martín, Entre Ríos, Argentina
| | - Danilo S Boskovic
- Division of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA, 92350, USA
| | - Sandaly O S Pacheco
- Interdisciplinary Center for Research in Health and Behavioral Sciences, School of Medicine, Universidad Adventista del Plata, 3103, Libertador San Martín, Entre Ríos, Argentina
- Institute for Food Science and Nutrition, Universidad Adventista del Plata, 3103, Libertador San Martín, Entre Ríos, Argentina
| | - Guangyu Zhang
- Division of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA, 92350, USA
| | - Gary E Fraser
- Center for Nutrition, Healthy Lifestyles and Disease Prevention, School of Public Health, Loma Linda University, Loma Linda, CA, 92350, USA
- Adventist Health Study, Loma Linda University, Loma Linda, CA, 92350, USA
- Department of Medicine, School of Medicine, Loma Linda University, Loma Linda, CA, 92350, USA
| | - Fayth L Miles
- Division of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA, 92350, USA.
- Center for Nutrition, Healthy Lifestyles and Disease Prevention, School of Public Health, Loma Linda University, Loma Linda, CA, 92350, USA.
- Adventist Health Study, Loma Linda University, Loma Linda, CA, 92350, USA.
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3
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Yu L, Peng J, Mineo C. Lipoprotein sialylation in atherosclerosis: Lessons from mice. Front Endocrinol (Lausanne) 2022; 13:953165. [PMID: 36157440 PMCID: PMC9498574 DOI: 10.3389/fendo.2022.953165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 08/15/2022] [Indexed: 11/22/2022] Open
Abstract
Sialylation is a dynamically regulated modification, which commonly occurs at the terminal of glycan chains in glycoproteins and glycolipids in eukaryotic cells. Sialylation plays a key role in a wide array of biological processes through the regulation of protein-protein interactions, intracellular localization, vesicular trafficking, and signal transduction. A majority of the proteins involved in lipoprotein metabolism and atherogenesis, such as apolipoproteins and lipoprotein receptors, are sialylated in their glycan structures. Earlier studies in humans and in preclinical models found a positive correlation between low sialylation of lipoproteins and atherosclerosis. More recent works using loss- and gain-of-function approaches in mice have revealed molecular and cellular mechanisms by which protein sialylation modulates causally the process of atherosclerosis. The purpose of this concise review is to summarize these findings in mouse models and to provide mechanistic insights into lipoprotein sialylation and atherosclerosis.
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Affiliation(s)
- Liming Yu
- Center for Pulmonary and Vascular Biology, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Jun Peng
- Center for Pulmonary and Vascular Biology, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Chieko Mineo
- Center for Pulmonary and Vascular Biology, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, United States
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, United States
- *Correspondence: Chieko Mineo,
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4
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Psefteli PM, Kitscha P, Vizcay G, Fleck R, Chapple SJ, Mann GE, Fowler M, Siow RC. Glycocalyx sialic acids regulate Nrf2-mediated signaling by fluid shear stress in human endothelial cells. Redox Biol 2021; 38:101816. [PMID: 33340902 PMCID: PMC7750408 DOI: 10.1016/j.redox.2020.101816] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/12/2020] [Accepted: 11/25/2020] [Indexed: 12/15/2022] Open
Abstract
Activation of the nuclear factor erythroid 2-related factor 2 (Nrf2) pathway is critical for vascular endothelial redox homeostasis in regions of high, unidirectional shear stress (USS), however the underlying mechanosensitive mediators are not fully understood. The endothelial glycocalyx is disrupted in arterial areas exposed to disturbed blood flow that also exhibit enhanced oxidative stress leading to atherogenesis. We investigated the contribution of glycocalyx sialic acids (SIA) to Nrf2 signaling in human endothelial cells (EC) exposed to atheroprotective USS or atherogenic low oscillatory shear stress (OSS). Cells exposed to USS exhibited a thicker glycocalyx and enhanced turnover of SIA which was reduced in cells cultured under OSS. Physiological USS, but not disturbed OSS, enhanced Nrf2-mediated expression of antioxidant enzymes, which was attenuated following SIA cleavage with exogenous neuraminidase. SIA removal disrupted kinase signaling involved in the nuclear accumulation of Nrf2 elicited by USS and promoted mitochondrial reactive oxygen species accumulation. Notably, knockdown of the endogenous sialidase NEU1 potentiated Nrf2 target gene expression, directly implicating SIA in regulation of Nrf2 signaling by USS. In the absence of SIA, deficits in Nrf2 responses to physiological flow were also associated with a pro-inflammatory EC phenotype. This study demonstrates that the glycocalyx modulates endothelial redox state in response to shear stress and provides the first evidence of an atheroprotective synergism between SIA and Nrf2 antioxidant signaling. The endothelial glycocalyx therefore represents a potential therapeutic target against EC dysfunction in cardiovascular disease and redox dyshomeostasis in ageing.
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Affiliation(s)
- Paraskevi-Maria Psefteli
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9NH, United Kingdom
| | - Phoebe Kitscha
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9NH, United Kingdom
| | - Gema Vizcay
- Centre for Ultrastructural Imaging, Faculty of Life Sciences & Medicine, King's College London, London, SE1 1UL, United Kingdom
| | - Roland Fleck
- Centre for Ultrastructural Imaging, Faculty of Life Sciences & Medicine, King's College London, London, SE1 1UL, United Kingdom
| | - Sarah J Chapple
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9NH, United Kingdom
| | - Giovanni E Mann
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9NH, United Kingdom
| | - Mark Fowler
- Strategic Science Group, Unilever R&D, Colworth Science Park, Bedford, MK44 1LQ, United Kingdom
| | - Richard C Siow
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9NH, United Kingdom.
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5
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Pirillo A, Svecla M, Catapano AL, Holleboom AG, Norata GD. Impact of protein glycosylation on lipoprotein metabolism and atherosclerosis. Cardiovasc Res 2020; 117:1033-1045. [PMID: 32886765 DOI: 10.1093/cvr/cvaa252] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/23/2020] [Accepted: 08/26/2020] [Indexed: 02/07/2023] Open
Abstract
Protein glycosylation is a post-translational modification consisting in the enzymatic attachment of carbohydrate chains to specific residues of the protein sequence. Several types of glycosylation have been described, with N-glycosylation and O-glycosylation being the most common types impacting on crucial biological processes, such as protein synthesis, trafficking, localization, and function. Genetic defects in genes involved in protein glycosylation may result in altered production and activity of several proteins, with a broad range of clinical manifestations, including dyslipidaemia and atherosclerosis. A large number of apolipoproteins, lipoprotein receptors, and other proteins involved in lipoprotein metabolism are glycosylated, and alterations in their glycosylation profile are associated with changes in their expression and/or function. Rare genetic diseases and population genetics have provided additional information linking protein glycosylation to the regulation of lipoprotein metabolism.
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Affiliation(s)
- Angela Pirillo
- Center for the Study of Atherosclerosis, E. Bassini Hospital, via M. Gorki 50, 20092 Cinisello Balsamo, Milan, Italy.,IRCCS MultiMedica, via Milanese 300, 20099 Sesto S. Giovanni, Milan, Italy
| | - Monika Svecla
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti 9, Milan 20133, Italy
| | - Alberico Luigi Catapano
- IRCCS MultiMedica, via Milanese 300, 20099 Sesto S. Giovanni, Milan, Italy.,Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti 9, Milan 20133, Italy
| | - Adriaan G Holleboom
- Department of Vascular Medicine, Amsterdam University Medical Centers, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Giuseppe Danilo Norata
- Center for the Study of Atherosclerosis, E. Bassini Hospital, via M. Gorki 50, 20092 Cinisello Balsamo, Milan, Italy.,Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti 9, Milan 20133, Italy
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6
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Zhang C, Chen J, Liu Y, Xu D. Sialic acid metabolism as a potential therapeutic target of atherosclerosis. Lipids Health Dis 2019; 18:173. [PMID: 31521172 PMCID: PMC6745061 DOI: 10.1186/s12944-019-1113-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 08/30/2019] [Indexed: 01/08/2023] Open
Abstract
Sialic acid (Sia), the acylated derivative of the nine-carbon sugar neuraminic acid, is a terminal component of the oligosaccharide chains of many glycoproteins and glycolipids. In light of its important biological and pathological functions, the relationship between Sia and coronary artery disease (CAD) has been drawing great attentions recently. Large-scale epidemiological surveys have uncovered a positive correlation between plasma total Sia and CAD risk. Further research demonstrated that N-Acetyl-Neuraminic Acid, acting as a signaling molecule, triggered myocardial injury via activation of Rho/ROCK-JNK/ERK signaling pathway both in vitro and in vivo. Moreover, there were some evidences showing that the aberrant sialylation of low-density lipoprotein, low-density lipoprotein receptor and blood cells was involved in the pathological process of atherosclerosis. Significantly, the Sia regulates immune response by binding to sialic acid-binding immunoglobulin-like lectin (Siglecs). The Sia-Siglecs axis is involved in the immune inflammation of atherosclerosis. The generation of Sia and sialylation of glycoconjugate both depend on many enzymes, such as sialidase, sialyltransferase and trans-sialidase. Abnormal activation or level of these enzymes associated with atherosclerosis, and inhibitors of them might be new CAD treatments. In this review, we focus on summarizing current understanding of Sia metabolism and of its relevance to atherosclerosis.
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Affiliation(s)
- Chao Zhang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, 410011, Hunan, China.,Department of Health Management Center, Hunan Provincial People's Hospital, 61 Jiefang West Road, Changsha, 410005, Hunan, China
| | - Jingyuan Chen
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Yuhao Liu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, 410011, Hunan, China
| | - Danyan Xu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, 139 Middle Renmin Road, Changsha, 410011, Hunan, China.
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7
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Hou P, Hu S, Wang J, Yang Z, Yin J, Zhou G, Guo S. Exogenous supplement of N-acetylneuraminic acid improves macrophage reverse cholesterol transport in apolipoprotein E-deficient mice. Lipids Health Dis 2019; 18:24. [PMID: 30678697 PMCID: PMC6346517 DOI: 10.1186/s12944-019-0971-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/08/2019] [Indexed: 12/30/2022] Open
Abstract
Background N-acetylneuraminic acid (NANA) is the major form of sialic acid in mammals, and the plasma NANA level is increased in patients with cardiovascular diseases. Exogenous supplement of NANA has been demonstrated to reduce hyperlipidaemia and the formation of atherosclerotic lesions; however, the underlying mechanisms have not yet been clarified. The aim of this study is to investigate whether exogenous supplement of NANA improves reverse cholesterol transprot (RCT) in vivo. Methods Apolipoprotein E-deficient mice fed a high-fat diet were used to investigate the effect of NANA on RCT by [3H]-cholesterol-loaded macrophages, and the underlying mechanism was further investigated by various molecular techniques using fenofibrate as a positive control. Results Our novel results demonstrated that exogenous supplement of NANA significantly improved [3H]-cholesterol transfer from [3H]-cholesterol-loaded macrophages to the plasma (an increase of > 42.9%), liver (an increase of 35.8%), and finally to the feces (an increase of 50.4% from 0 to 24 h) for excretion in apolipoprotein E-deficient mice fed a high-fat diet. In addition, NANA up regulated the protein expression of ATP-binding cassette (ABC) G1 and peroxisome proliferator-activated receptor α (PPARα), but not the protein expression of ABCA1and scavenger receptor B type 1 in the liver. Therefore, the underlying mechanism of NANA in improving RCT may be partially due to the elevated protein levels of PPARα and ABCG1. Conclusion Exogenous supplement of NANA improves RCT in apolipoprotein E-deficient mice fed a high-fat diet mainly by improving the protein expression of PPARα and ABCG1. These results are helpful in explaining the lipid-lowering effect of NANA.
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Affiliation(s)
- Pengbo Hou
- Research Center on Life Sciences and Environmental Sciences, Harbin University of Commerce, Harbin, 150076, China.,Institute of Lipid Metabolism and Atherosclerosis, Innovative Drug Research Centre, School of Pharmacy, Weifang Medical University, 7166# Baotongxi Street, Weifang, 261053, Shandong Province, China
| | - Shumei Hu
- Institute of Lipid Metabolism and Atherosclerosis, Innovative Drug Research Centre, School of Pharmacy, Weifang Medical University, 7166# Baotongxi Street, Weifang, 261053, Shandong Province, China
| | - Jin Wang
- Institute of Lipid Metabolism and Atherosclerosis, Innovative Drug Research Centre, School of Pharmacy, Weifang Medical University, 7166# Baotongxi Street, Weifang, 261053, Shandong Province, China
| | - Zixun Yang
- Research Center on Life Sciences and Environmental Sciences, Harbin University of Commerce, Harbin, 150076, China.,Institute of Lipid Metabolism and Atherosclerosis, Innovative Drug Research Centre, School of Pharmacy, Weifang Medical University, 7166# Baotongxi Street, Weifang, 261053, Shandong Province, China
| | - Jiayu Yin
- Research Center on Life Sciences and Environmental Sciences, Harbin University of Commerce, Harbin, 150076, China.,Institute of Lipid Metabolism and Atherosclerosis, Innovative Drug Research Centre, School of Pharmacy, Weifang Medical University, 7166# Baotongxi Street, Weifang, 261053, Shandong Province, China
| | | | - Shoudong Guo
- Research Center on Life Sciences and Environmental Sciences, Harbin University of Commerce, Harbin, 150076, China. .,Institute of Lipid Metabolism and Atherosclerosis, Innovative Drug Research Centre, School of Pharmacy, Weifang Medical University, 7166# Baotongxi Street, Weifang, 261053, Shandong Province, China. .,Taishan Medical University, Taian, 271000, China.
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8
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Theoretical Studies on the Electronic Structure Parameters and Reactive Activity of Neu5Gc and Neu5Ac under Food Processing Solvent Environment. Molecules 2019; 24:molecules24020313. [PMID: 30654545 PMCID: PMC6359032 DOI: 10.3390/molecules24020313] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 01/14/2019] [Accepted: 01/14/2019] [Indexed: 11/19/2022] Open
Abstract
The animal product hazard factor N-glycolylneuraminic (Neu5Gc) and brain nutrient substance N-acetylneuraminic acid (Neu5Ac) were studied at the M062X/6-311 + G(d,p) geometry optimization level. We considered the electronic structure parameters with different solvents: (benzene ε = 2.27, acetic acid ε = 6.25, ethanol ε = 24.85, lactic acid ε = 22.00, formic acid ε = 51.1, water ε = 78.35). The maximum molecular surface electrostatic potentials, which were 62.77 for Neu5Gc and 60.90 kcal/mol for Neu5Ac, are both located on the carboxyl group hydrogen. The orbital analysis showed that the amide group and carboxyl group confer the sites with susceptibility to nucleophilic and electrophilic attack, respectively. The solvent effect showed that polar solvents, such as formic acid and water, can enhance the two molecules’ nucleophilic activity. To better understand the roles of the hydroxyl group in the two molecules, the independent gradient model theory confirmed the four intramolecular hydrogen bonds of Neu5Gc at gas phase, whereas Neu5Ac only has two. The lowest bond dissociation energy in solvent occurs at O7-H, which is 104.03 kcal/mol in water for Neu5Gc and 104.57 kcal/mol in lactic acid for Neu5Ac. The lowest proton affinity value for Neu5Gc (20.34 kcal/mol) and Neu5Ac (20.76 kcal/mol) was both occur at the carboxyl group O6-H under ethanol. The antioxidant mechanisms of the two sialic acid are prone to sequential proton-loss electron transfer under polar or non-polar solvents.
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9
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Bastani A, Rajabi S, Daliran A, Saadat H, Karimi-Busheri F. Oxidant and antioxidant status in coronary artery disease. Biomed Rep 2018; 9:327-332. [PMID: 30233785 DOI: 10.3892/br.2018.1130] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 06/25/2018] [Indexed: 12/11/2022] Open
Abstract
Formation of atherosclerotic plaques is the major cause of coronary artery disease (CAD). Several lines of study have revealed the role of oxidative stress in CAD pathogenesis. In the present study the aim was to investigate the oxidative and antioxidative markers in CAD patients and a control population. The study sample comprised of acute coronary syndrome (ACS) patients, chronic CAD patients and healthy controls (n=30/group). Blood samples of patients and control subjects were collected to measure the concentrations of reduced glutathione (GSH), malondialdehyde (MDA) and the percentage of MDA release as well as the activity of erythrocyte glutathione peroxidase (GPx) and total antioxidant capacity (TAC) of plasma. All parameters were measured by spectrophotometric methods. Additionally, oxidant/antioxidant status was compared between CAD patients with single, double or triple-vessel stenosis and in comparison with controls. The results indicated a significant increase in MDA level and the percentage of MDA release (P<0.05), and a marked decrease in GSH concentration (P<0.0001), TAC (P<0.0001) and the activity of erythrocyte GPx (P<0.0001) in the patient groups compared controls. ACS patients exhibited a similar pattern of data when compared with the chronic CAD group. Similar results were also observed when chronic CAD patients with single, double or triple vessel stenosis and controls were compared. The present study indicates that the acute form of CAD is more susceptible to oxidative damage, suggesting that use of antioxidant therapy may be warranted to ameliorate oxidative stress in this condition.
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Affiliation(s)
- Abdolhossein Bastani
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran
| | - Sadegh Rajabi
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran
| | - Afshin Daliran
- Department of Clinical Biochemistry, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran
| | - Habibollah Saadat
- Cardiovascular Research Center, Modares Hospital, Shahid Beheshti University of Medical Sciences, Tehran 1998734383, Iran
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10
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Tian H, Liu Q, Qin S, Zong C, Zhang Y, Yao S, Yang N, Guan T, Guo S. Synthesis and cardiovascular protective effects of quercetin 7-O-sialic acid. J Cell Mol Med 2017; 21:107-120. [PMID: 27511707 PMCID: PMC5192943 DOI: 10.1111/jcmm.12943] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 07/04/2016] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress and inflammation play important roles in the pathogenesis of cardiovascular disease (CVD). Oxidative stress-induced desialylation is considered to be a primary step in atherogenic modification, and therefore, the attenuation of oxidative stress and/or inflammatory reactions may ameliorate CVD. In this study, quercetin 7-O-sialic acid (QA) was synthesized aiming to put together the cardiovascular protective effect of quercetin and the recently reported anti-oxidant and anti-atherosclerosis functions of N-acetylneuraminic acid. The biological efficacy of QA was evaluated in vitro in various cellular models. The results demonstrated that 50 μM QA could effectively protect human umbilical vein endothelial cells (HUVEC, EA.hy926) against hydrogen peroxide- or oxidized low-density lipoprotein-induced oxidative damage by reducing the production of reactive oxygen species. QA attenuated hydrogen peroxide-induced desialylation of HUVEC and lipoproteins. QA decreased lipopolysaccharide-induced secretion of tumour necrosis factor-α (TNF-α) and monocyte chemoattractant protein-1 (MCP-1), and it significantly reduced the expression of intercellular adhesion molecule-1, vascular cell adhesion molecule-1, TNF-α and MCP-1. Furthermore, QA effectively promoted cholesterol efflux from Raw 264.7 macrophages to apolipoprotein A-1 and high-density lipoprotein by up-regulating ATP-binding cassette transporter A1 and G1, respectively. Results indicated that the novel compound QA exhibited a better capacity than quercetin for anti-oxidation, anti-inflammation, cholesterol efflux promotion and biomolecule protection against desialylation and therefore could be a candidate compound for the prevention or treatment of CVD.
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Affiliation(s)
- Hua Tian
- Key Laboratory of Atherosclerosis in Universities of Shandong ProvinceInstitute of AtherosclerosisTaishan Medical UniversityTaianChina
| | - Qingchao Liu
- Department of Pharmaceutical EngineeringNorthwest UniversityXi'anChina
| | - Shucun Qin
- Key Laboratory of Atherosclerosis in Universities of Shandong ProvinceInstitute of AtherosclerosisTaishan Medical UniversityTaianChina
| | - Chuanlong Zong
- Key Laboratory of Atherosclerosis in Universities of Shandong ProvinceInstitute of AtherosclerosisTaishan Medical UniversityTaianChina
| | - Ying Zhang
- Key Laboratory of Atherosclerosis in Universities of Shandong ProvinceInstitute of AtherosclerosisTaishan Medical UniversityTaianChina
| | - Shutong Yao
- Key Laboratory of Atherosclerosis in Universities of Shandong ProvinceInstitute of AtherosclerosisTaishan Medical UniversityTaianChina
| | - Nana Yang
- Key Laboratory of Atherosclerosis in Universities of Shandong ProvinceInstitute of AtherosclerosisTaishan Medical UniversityTaianChina
| | - Tao Guan
- Key Laboratory of Atherosclerosis in Universities of Shandong ProvinceInstitute of AtherosclerosisTaishan Medical UniversityTaianChina
| | - Shoudong Guo
- Key Laboratory of Atherosclerosis in Universities of Shandong ProvinceInstitute of AtherosclerosisTaishan Medical UniversityTaianChina
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Guo S, Tian H, Dong R, Yang N, Zhang Y, Yao S, Li Y, Zhou Y, Si Y, Qin S. Exogenous supplement of N-acetylneuraminic acid ameliorates atherosclerosis in apolipoprotein E-deficient mice. Atherosclerosis 2016; 251:183-191. [DOI: 10.1016/j.atherosclerosis.2016.05.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 05/13/2016] [Accepted: 05/18/2016] [Indexed: 12/14/2022]
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12
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Altay M, Karakoç MA, Çakır N, Yılmaz Demirtaş C, Cerit ET, Aktürk M, Ateş İ, Bukan N, Arslan M. Serum Total Sialic Acid Level is Elevated in Hypothyroid Patients as an Atherosclerotic Risk Factor. J Clin Lab Anal 2016; 31. [PMID: 27457058 DOI: 10.1002/jcla.22034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 06/28/2016] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Serum total sialic acid (TSA) concentration is regarded as an indicator of the risks of atherosclerosis and cardiovascular diseases. The association between SA levels and atherosclerosis risk factors has not been assessed in patients with thyroid diseases. METHODS Sixty newly diagnosed treatment-naive hypothyroid patients, 35 with subclinical and 25 with overt hypothyroidism, and 30 euthyroid individuals were analyzed. SA was measured in fasting blood samples, as were routine biochemical parameters, some atherosclerosis markers and carotid artery intima media thickness (CIMT). RESULTS Mean SA (38.1 ± 12.0 vs. 46.0 ±15.8; P = 0.019) and CIMT (0.57 ± 0.06 vs. 0.62 ± 0.12; P = 0.013) were found to be higher in the patient group compared with the control group. Mean sialic acid was higher in overt hypothyroidism patients compared with subclinical hypothyroidism patients and the control group. No difference was found between the subclinical hypothyroidism group and the control group. Sialic acid level and CIMT had a positive correlation in both the entire population and the hypothyroidism group. The linear regression model established for mean CIMT level in the entire population showed that risk factors of LDL (B ± SE = 0.454 ± 0.206; P = 0.030), uric acid (B ± SE = 1.902 ± 0.686; P = 0.007), hs-CRP (B ± SE = 1.003 ± 0.380; P =0.010), and SA (B ± SE = 2.419 ± 0.450; P < 0.001) were independent predictors of CIMT level. CONCLUSION Sialic acid level is elevated in hypothyroid patients. However, this elevation is not related to thyroid hormone levels and autoantibodies. Correlations between SA and atherosclerosis indicators, such as CIMT, LDL, hs-CRP, and uric acid, in hypothyroid individuals suggest that SA may be an indicator of atherogenesis in these patients.
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Affiliation(s)
- Mustafa Altay
- Department of Endocrinology and Metabolism, Gazi University Medical Faculty, Ankara, Turkey
| | - Mehmet Ayhan Karakoç
- Department of Endocrinology and Metabolism, Gazi University Medical Faculty, Ankara, Turkey
| | - Nuri Çakır
- Department of Endocrinology and Metabolism, Gazi University Medical Faculty, Ankara, Turkey
| | | | - Ethem Turgay Cerit
- Department of Endocrinology and Metabolism, Gazi University Medical Faculty, Ankara, Turkey
| | - Müjde Aktürk
- Department of Endocrinology and Metabolism, Gazi University Medical Faculty, Ankara, Turkey
| | - İhsan Ateş
- Department of Internal Medicine, Numune Education and Research Hospital, Ankara, Turkey
| | - Neslihan Bukan
- Clinical Biochemistry, Gazi University Medical Faculty, Ankara, Turkey
| | - Metin Arslan
- Department of Endocrinology and Metabolism, Gazi University Medical Faculty, Ankara, Turkey
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Yılmaz EE, Bozdağ Z, Ibiloğlu I, Arıkanoğlu Z, Yazgan ÜC, Kaplan I, Gümüş M, Atamanalp SS. Therapeutic effects of ellagic acid on L-arginin ınduced acute pancreatitis. Acta Cir Bras 2016; 31:396-401. [DOI: 10.1590/s0102-865020160060000006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 05/19/2016] [Indexed: 12/23/2022] Open
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14
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Arteriovenous Blood Metabolomics: A Readout of Intra-Tissue Metabostasis. Sci Rep 2015; 5:12757. [PMID: 26244428 PMCID: PMC4525490 DOI: 10.1038/srep12757] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 06/23/2015] [Indexed: 12/21/2022] Open
Abstract
The human circulatory system consists of arterial blood that delivers nutrients to tissues, and venous blood that removes the metabolic by-products. Although it is well established that arterial blood generally has higher concentrations of glucose and oxygen relative to venous blood, a comprehensive biochemical characterization of arteriovenous differences has not yet been reported. Here we apply cutting-edge, mass spectrometry-based metabolomic technologies to provide a global characterization of metabolites that vary in concentration between the arterial and venous blood of human patients. Global profiling of paired arterial and venous plasma from 20 healthy individuals, followed up by targeted analysis made it possible to measure subtle (<2 fold), yet highly statistically significant and physiologically important differences in water soluble human plasma metabolome. While we detected changes in lactic acid, alanine, glutamine, and glutamate as expected from skeletal muscle activity, a number of unanticipated metabolites were also determined to be significantly altered including Krebs cycle intermediates, amino acids that have not been previously implicated in transport, and a few oxidized fatty acids. This study provides the most comprehensive assessment of metabolic changes in the blood during circulation to date and suggests that such profiling approach may offer new insights into organ homeostasis and organ specific pathology.
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Yerlikaya FH, Toker A, Çiçekler H, Arıbaş A. The association of total sialic acid and malondialdehyde levels with metabolic and anthropometric variables in obesity. Biotech Histochem 2014; 90:31-7. [PMID: 25151992 DOI: 10.3109/10520295.2014.937744] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Serum sialic acid levels are abnormally high in pathological states that exhibit tissue destruction, tissue proliferation or inflammation. We measured total serum sialic acid levels in 139 women and 125 men. Subjects were divided into quartiles according to their body mass index (BMI): Q1 (18-24.9 kg/m(2)), Q2 (25-29.9 kg/m(2)), Q3 (30-39.9 kg/m(2)) and Q4 (> 40 kg/m(2)). The patients in Q1 constituted the control group. Serum sialic acid levels of subjects in Q2, Q3 and Q4 were significantly higher than those in Q1. Higher BMI quartiles also were associated with higher levels of serum glucose, insulin, total cholesterol, LDL-cholesterol, triglycerides, high-sensitivity C-reactive protein, malondialdehyde levels, waist circumference, blood pressure and homeostasis model assessment of insulin resistance in both women and men. Lower BMI quartiles were associated with higher levels of serum HDL-cholesterol levels in both women and men. We found positive associations among serum sialic acid levels, BMI and oxidative stress. Serum sialic acid also is related to some conventional cardiovascular risk factors including elevated lipid profile, increased blood pressure, increased serum glucose and insulin levels, and insulin resistance in obese people.
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Affiliation(s)
- F H Yerlikaya
- Necmettin Erbakan University, Meram Faculty of Medicine, Department of Biochemistry , Konya , Turkey
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16
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Salivary lipid peroxidation and total sialic acid levels in smokers and smokeless tobacco users as Maraş powder. Mediators Inflamm 2012; 2012:619293. [PMID: 22577253 PMCID: PMC3347744 DOI: 10.1155/2012/619293] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Accepted: 02/24/2012] [Indexed: 01/09/2023] Open
Abstract
Maraş powder (MP), a different type of smokeless tobacco (ST) and prepared from a tobacco of species Nicotiana rustica Linn, is widely used in Turkey. We aimed to investigate the effects of MP on salivary total sialic acid (TSA) and malondialdehyde (MDA) levels and to compare these parameters in smokers and MP users (MPUs). The salivary TSA and MDA concentrations were significantly higher in the smokers and MPU than those of control subjects and also in MPU than that of smokers. We have also observed that as the number of cigarettes consumed and MP amount increases, TSA and MDA levels increase too. In smokers, MDA values were significantly correlated with the number of cigarettes smoked and the duration of smoking. In MPU, both MDA and TSA levels were significantly correlated with the duration of MP use and the amount of daily consumed MP. We have concluded increased salivary TSA and MDA levels associated in MPU and smokers. Results can help to evaluate harmful effects of these habits. It is important to point out that bigger change in the measured parameters has been observed for MP use. This observation may be an important indication of harmful effects of ST use as MP.
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Rahsepar AA, Mirzaee A, Moodi F, Moohebati M, Tavallaie S, Eshraghi A, Alavi MS, Khorashadizadeh F, Pourghadamyari H, Paydar R, Amini M, Khojasteh R, Mousavi S, Sahebi M, Ghayour-Mobarhan M, Ferns GA. Prooxidant-Antioxidant Balance and Antioxidized LDL Antibody Level Values and Cardiac Function in Patients with Coronary Artery Disease. Cardiology 2012; 122:203-9. [DOI: 10.1159/000339273] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Accepted: 04/27/2012] [Indexed: 11/19/2022]
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18
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Dede O, Varol E, Altinbas A, Varol S. Chronic fluoride exposure has a role in etiology of coronary artery ectasia: sialic acid/glycosaminoglycan ratio. Biol Trace Elem Res 2011; 143:695-701. [PMID: 21136197 DOI: 10.1007/s12011-010-8913-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Accepted: 11/26/2010] [Indexed: 11/27/2022]
Abstract
The sialic acid/glycosaminoglycan ratio was determined in 35 coronary artery ectasia patients and 35 control subjects to determine the possible role of fluoride in the etiology of the disease. The coronary artery ectasia patients and controls were selected from subjects who underwent coronary angiography. The mean serum sialic acid level was significantly lower in patients with coronary artery ectasia (CAE) than in controls (340.3±28.6 vs. 427.0±15.9 μg/mL, respectively; p<0.001). The mean serum glycosaminoglycan level was significantly higher in patients with CAE than in controls (5,013.1±158.6 vs. 3,833.6±237.1 μg/mL, respectively; p<0.001). The sialic acid/glycosaminoglycan ratio in patients with coronary artery ectasia was significantly lower than in controls (0.068±0.007 vs. 0.111±0.005; p<0.001). There was more than 38.7% reduction in this ratio in patients with CAE when compared with controls. We demonstrated that chronic fluoride exposure has an important role in pathogenesis of coronary artery ectasia.
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Prooxidant–anti-oxidant balance is not associated with extent of coronary artery disease. Clin Biochem 2011; 44:1304-8. [DOI: 10.1016/j.clinbiochem.2011.08.1133] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 08/10/2011] [Accepted: 08/14/2011] [Indexed: 01/21/2023]
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20
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Cemek M, Aymelek F, Büyükokuroğlu ME, Karaca T, Büyükben A, Yilmaz F. Protective potential of Royal Jelly against carbon tetrachloride induced-toxicity and changes in the serum sialic acid levels. Food Chem Toxicol 2010; 48:2827-32. [PMID: 20637822 DOI: 10.1016/j.fct.2010.07.013] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Revised: 06/17/2010] [Accepted: 07/08/2010] [Indexed: 11/30/2022]
Abstract
Royal Jelly (RJ) is used in the Turkish folk medicine for the treatment of number of disorders. The present study describes the hepatoprotective and antioxidant activities of the RJ against carbon tetrachloride (CCl(4))-induced acute liver damage. Sprague-Dawley rats were used for the experiment. CCl(4) (0.8 ml/kg; s.c.) and RJ (50, 100, 200mg/kg; orally) were given every other day, for 20 days. Malondialdehyde, reduced glutathione in whole blood and tissues; ceruloplasmin, sialic acid, ascorbic acid, retinol, β-carotene and liver enzymes levels in serum were measured. Additionally, histopathological alterations in the liver were examined. RJ exerted the significant protective effect on liver damage as well as on oxidative stress induced by CCl(4), resulting in reduced lipid peroxidation and improved endogenous antioxidant defence systems. It also reduced the elevated levels of liver enzymes. Histopathological study further confirmed the hepatoprotective effect of RJ, when compared with the CCl(4) treated control groups. In conclusion, present study reveals biological evidence that supports the use of RJ in the treatment of chemical-induced hepatotoxicity.
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Affiliation(s)
- Mustafa Cemek
- Department of Chemistry, Biochemistry Division, Faculty of Sciences and Arts, Kocatepe University, Afyonkarahisar, Turkey
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21
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Ciftci G, Cenesiz S, Yarim GF, Nisbet O, Nisbet C, Cenesiz M, Guvenc D. Effect of fluoride exposure on serum glycoprotein pattern and sialic acid level in rabbits. Biol Trace Elem Res 2010; 133:51-9. [PMID: 19904501 DOI: 10.1007/s12011-009-8563-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2008] [Accepted: 10/27/2009] [Indexed: 10/20/2022]
Abstract
This study describes the effects of fluoride exposure on the protein profile, glycoprotein pattern, and total sialic acid concentration of serum in rabbits. For this aim; 20 healthy New Zealand rabbits were used. The rabbits were divided into two equal groups each with ten animals according to their weighing: control group and experimental group. The rabbits in control group were given drinking tap water containing 0.29 mg/l sodium fluoride and experimental group received the same tap water to which was added 40 mg/l sodium fluoride for 70 days. Blood samples were taken from each rabbit on day 70. Serum fluoride concentrations were measured by a fluoride-specific ion electrode in serum. The fluoride levels in the serum were found as 18.4 (+/-1.58) microg/L in control and 301.3 (+/-52.18) microg/L in fluoride exposed rabbits. The sialic acid levels were found as 69.2 (+/-0.32) mg/dL in control and 43.4 (+/-0.13) mg/dL in fluoride exposed group. The electrophoretic patterns of serum proteins, glycoproteins, and total sialic acid concentration were determined. Fifteen different protein fractions with molecular weights ranging from 22 to 249 kDa were displayed in the serum protein electrophoretic gel of both groups. The raw concentrations of the protein fractions decreased in fluoride exposed rabbits as compared with the control rabbits. The serum glycoprotein pattern revealed seven major protein bands from 47 to 167 kDa in experimental and control groups. The slight decrease of raw concentration of the protein bands in glycoprotein pattern of serum was observed in fluoride toxication comparing to control. The results suggest that serum TSA determination and serum protein electrophoresis can be used to evaluate prognosis of fluoride exposure as a supplementary laboratory test in combination with clinical and other laboratory findings of fluorosis.
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Affiliation(s)
- Gulay Ciftci
- Department of Biochemistry, Faculty of Veterinary Medicine, University of Ondokuz Mayis, 55139 Samsun, Turkey.
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Oztürk LK, Akyüz S, Yarat A, Koç S, Gül N, Doğan BN. Salivary lipid peroxidation and total sialic acid levels during healthy gestation and postpartum: a longitudinal study. Clin Biochem 2009; 43:430-4. [PMID: 19896477 DOI: 10.1016/j.clinbiochem.2009.10.053] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Revised: 10/22/2009] [Accepted: 10/26/2009] [Indexed: 10/20/2022]
Abstract
OBJECTIVES This study investigated salivary lipid peroxidation (LPO) as an oxidative stress marker and salivary total sialic acid (TSA) as an inflammatory response during gestation and postpartum. DESIGN AND METHODS Salivary LPO and TSA levels, using the Ledwozyw and Warren methods respectively, were obtained in healthy pregnant women followed up during gestation and 6-8 weeks postpartum, and in healthy non-pregnant controls. All were with good oral health. RESULTS LPO was significantly higher than controls during all trimesters and postpartum and in the second trimester than in the third trimester and postpartum. TSA in the second trimester was significantly higher than in any other group. First trimester levels were significantly higher than postpartum . Oral health indices remained within normal levels for the duration. CONCLUSION The salivary LPO profile followed plasma gestation and postpartum profiles in the literature but the salivary TSA differed in that after the 2nd trimester, rather than persisting, it decreased.
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Affiliation(s)
- L Koç Oztürk
- Marmara University, Faculty of Dentistry, Department of Basic Sciences, Istanbul, 34365, Turkey.
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Oxidative stress induced changes in plasma protein can be a predictor of imminent severe dengue infection. Acta Trop 2008; 106:156-61. [PMID: 18420173 DOI: 10.1016/j.actatropica.2008.03.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2007] [Revised: 03/03/2008] [Accepted: 03/04/2008] [Indexed: 01/23/2023]
Abstract
OBJECTIVES Oxidative stress in dengue viral infection has been suggested and severity of it was found to be associated with progress of illness. Hence assessing oxidative stress mediated changes in plasma proteins can be an early biomarker for prediction of severe dengue infection. DESIGN AND METHODS Thirty two dengue hemorrhagic fever (DHF), 21 dengue shock syndrome (DSS), 27 dengue fever (DF) and 63 age and sex matched controls, were included in this study. Blood samples were collected on the 3rd day of fever. Protein carbonylation (PCOs) and protein-bound sulphydryl (PBSH) group levels were determined by spectrophotometric method and analyzed as predictor of dengue hemorrhagic fever and dengue shock syndrome. RESULTS About 80-84% of cases presented with no signs of DHF/DSS at the time of sampling. Dengue infected individuals had significantly elevated PCOs and low PBSH group levels than the controls. Using one-way ANOVA we found a significant difference with high PCOs and low PBSH group levels between DHF and DSS when compared with DF (P<0.001). However, no difference was observed in PBSH group levels between DHF and DSS. A significant difference in PCOs to PBSH ratio was observed among DF, DHF and DSS (P<0.001). Linear regression analysis revealed that duration of hospitalization is dependent on PCOs and PBSH group levels. Receiver operator curve (ROC) analysis indicated that 5.22nmol/mg protein PCOs; 1.08 PCOs to PBSH group levels ratio were optimal cutoff value for predicting DHF with sensitivity and specificity of 87.5% and 74.1%; 96.9% and 81.5%, respectively. For DSS prediction, 6.13 nmol/mg protein PCOs; 1.16 PCOs to PBSH group levels ratio were found as effective cutoff with sensitivity and specificity of 81% and 71.9%; 95.2% and 56.2%, respectively. CONCLUSION Oxidative stress has been observed to develop since early days of onset of dengue infection. Plasma PCOs, PCOs to PBSH group ratio were found to very well predict DHF/DSS.
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