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Piechocka J, Wyszczelska-Rokiel M, Głowacki R. Simultaneous determination of 2-(3-hydroxy-5-phosphonooxymethyl-2-methyl-4-pyridyl)-1,3-thiazolidine-4-carboxylic acid and main plasma aminothiols by HPLC-UV based method. Sci Rep 2023; 13:9294. [PMID: 37286735 DOI: 10.1038/s41598-023-36548-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 06/06/2023] [Indexed: 06/09/2023] Open
Abstract
The report presents the first method for simultaneous determination of plasma 2-(3-hydroxy-5-phosphonooxymethyl-2-methyl-4-pyridyl)-1,3-thiazolidine-4-carboxylic acid (HPPTCA), an adduct of cysteine (Cys) and active form of vitamin B6 pyridoxal 5'-phosphate (PLP), as well as total low molecular-weight thiols content, including Cys, homocysteine (Hcy), cysteinyl-glycine (Cys-Gly), and glutathione (GSH). The assay is based on high performance liquid chromatography coupled with ultraviolet detection (HPLC-UV) and involves disulfides reduction with tris(2-carboxyethyl)phosphine (TCEP), derivatization with 2-chloro-1-methylquinolinium tetrafluoroborate (CMQT) followed by sample deproteinization with perchloric acid (PCA). The chromatographic separation of obtained stable UV-absorbing derivatives is achieved on ZORBAX SB-C18 (150 × 4.6 mm, 5.0 µm) column using gradient elution with eluent consisted of 0.1 mol/L trichloroacetic acid (TCA), pH 1.7 and acetonitrile (ACN), delivered at a flow rate 1 mL/min. Under these conditions, the analytes are separated within 14 min at room temperature, and quantified by monitoring at 355 nm. Regarding HPPTCA, the assay linearity was demonstrated within a 1-100 µmol/L in plasma and the lowest concentration on the calibration curve was recognized as the limit of quantification (LOQ). The accuracy ranged from 92.74 to 105.57% and 95.43 to 115.73%, while precision varied from 2.48 to 6.99% and 0.84 to 6.98% for intra- and inter-day measurements, respectively. The utility of the assay was proved by application to plasma samples delivered by apparently healthy donors (n = 18) in which the HPPTCA concentration ranged from 19.2 to 65.6 µmol/L. The HPLC-UV assay provides complementary tool for routine clinical analysis, facilitating further studies on the role of aminothiols and HPPTCA in living systems.
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Affiliation(s)
- Justyna Piechocka
- Department of Environmental Chemistry, Faculty of Chemistry, University of Lodz, 163/165 Pomorska Str., 90-236, Łódź, Poland.
| | - Monika Wyszczelska-Rokiel
- Department of Environmental Chemistry, Faculty of Chemistry, University of Lodz, 163/165 Pomorska Str., 90-236, Łódź, Poland
| | - Rafał Głowacki
- Department of Environmental Chemistry, Faculty of Chemistry, University of Lodz, 163/165 Pomorska Str., 90-236, Łódź, Poland.
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Ye M, Li H, Luo H, Zhou Y, Luo W, Lin Z. Potential Antioxidative Activity of Homocysteine in Erythrocytes under Oxidative Stress. Antioxidants (Basel) 2023; 12:antiox12010202. [PMID: 36671064 PMCID: PMC9855177 DOI: 10.3390/antiox12010202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/18/2023] Open
Abstract
Homocysteine is an amino acid containing a free sulfhydryl group, making it probably contribute to the antioxidative capacity in the body. We recently found that plasma total homocysteine (total-Hcy) concentration increased with time when whole blood samples were kept at room temperature. The present study was to elucidate how increased plasma total-Hcy is produced and explore the potential physiological role of homocysteine. Erythrocytes and leukocytes were separated and incubated in vitro; the amount of total-Hcy released by these two kinds of cells was then determined by HPLC-MS. The effects of homocysteine and methionine on reactive oxygen species (ROS) production, osmotic fragility, and methemoglobin formation in erythrocytes under oxidative stress were studied. The reducing activities of homocysteine and methionine were tested by ferryl hemoglobin (Hb) decay assay. As a result, it was discovered that erythrocytes metabolized methionine to homocysteine, which was then oxidized within the cells and released to the plasma. Homocysteine and its precursor methionine could significantly decrease Rosup-induced ROS production in erythrocytes and inhibit Rosup-induced erythrocyte's osmotic fragility increase and methemoglobin formation. Homocysteine (but not methionine) was demonstrated to enhance ferryl Hb reduction. In conclusion, erythrocytes metabolize methionine to homocysteine, which contributes to the antioxidative capability under oxidative stress and might be a supplementary protective factor for erythrocytes against ROS damage.
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Cheng Y, Liu S, Chen D, Yang Y, Liang Q, Huo Y, Zhou Z, Zhang N, Wang Z, Liu L, Song Y, Liu X, Duan Y, Liang X, Hou B, Wang B, Tang G, Qin X, Yan F. Association between serum 5-methyltetrahydrofolate and homocysteine in Chinese hypertensive participants with different MTHFR C677T polymorphisms: a cross-sectional study. Nutr J 2022; 21:29. [PMID: 35562805 PMCID: PMC9102656 DOI: 10.1186/s12937-022-00786-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 05/08/2022] [Indexed: 12/03/2022] Open
Abstract
Background and aims Clarifying the association between 5-methyltetrahydrofolate and homocysteine and the effect pattern of methylene tetrahydrofolate reductase (MTHFR C677T) may contribute to the management of homocysteine and may serve as a significant reference for a randomized controlled trial of 5-methyltetrahydrofolate intervention. This study aimed to reveal the association between these two biochemical indices. Methods Study population was drawn from the baseline data of the China Stroke Primary Prevention Trial (CSPPT), including 2328 hypertensive participants. 5-methyltetrahydrofolate and homocysteine were determined by stable-isotope dilution liquid chromatography-tandem mass spectrometry and automatic clinical analyzers, respectively. MTHFR C677T polymorphisms were detected using TaqMan assay. Multiple linear regression was performed to evaluate the association between serum 5-methyltetrahydrofolate and homocysteine. Results There was a significant inverse association between 5-methyltetrahydrofolate and homocysteine when 5-methyltetrahydrofolate was ≤ 10 ng/mL, and this association was modified by MTHFR C677T (per 1-ng/mL increment; All: β = − 0.50, P < 0.001; CC: β = − 0.14, P = 0.087; CT: β = − 0.20, P = 0.011; TT: β = − 1.19, P < 0.001). Moreover, the decline in trend in genotype TT participants was stronger than in genotype CC participants (P for difference < 0.001) and genotype CT participants (P for difference < 0.001), while there was no significant difference between genotype CC and genotype CT participants (P for difference = 0.757). Conclusions Our data showed a non-linear association between serum homocysteine and 5-methyltetrahydrofolate among Chinese hypertensive adults, however, it could be inversely linearly fitted when serum 5-methyltetrahydrofolate was ≤ 10 ng/mL, and this association was modified by MTHFR C677T. Supplementary Information The online version contains supplementary material available at 10.1186/s12937-022-00786-w.
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Affiliation(s)
- Yu Cheng
- State Key Laboratory of Natural Medicines, Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210000, China
| | - Shuai Liu
- State Key Laboratory of Natural Medicines, Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210000, China
| | - Duo Chen
- State Key Laboratory of Natural Medicines, Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210000, China
| | - Yiman Yang
- State Key Laboratory of Natural Medicines, Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210000, China
| | - Qiongyue Liang
- State Key Laboratory of Natural Medicines, Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210000, China
| | - Ya Huo
- State Key Laboratory of Natural Medicines, Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210000, China
| | - Ziyi Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Nan Zhang
- Department of Cardiology, Peking University First Hospital, Beijing, China
| | - Zhuo Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Lishun Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Yun Song
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Institute of Biomedicine, Anhui Medical University, Hefei, China
| | - Xiangyi Liu
- BeiJing TongRen Hospital, CMU, Beijing, China
| | - Yong Duan
- Yunnan Key Laboratory of Laboratory Medicine, Kunming, China.,Department of Clinical Laboratory, the First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Xiuwen Liang
- China Mongolia Hospital of Hulunbuir, Inner Mongolia, China
| | - Bingjie Hou
- The Fourth Central Hospital of Baoding City, Hebei, Baoding, China
| | - Binyan Wang
- Institute of Biomedicine, Anhui Medical University, Hefei, China.,Shenzhen Evergreen Medical Institute, Shenzhen, China
| | - Genfu Tang
- School of Health Administration, Anhui Medical University, Hefei, China
| | - Xianhui Qin
- Division of Nephrology, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease; State Key Laboratory of Organ Failure Research; Guangdong Provincial Institute of Nephrology, Guangdong Provincial Key Laboratory of Renal Failure Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, 510000, China.
| | - Fangrong Yan
- State Key Laboratory of Natural Medicines, Research Center of Biostatistics and Computational Pharmacy, China Pharmaceutical University, Nanjing, 210000, China.
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Hyung SW, Lee S, Han J, Lee J, Beak SY, Kim B, Choi K, Ahn S. Highly sensitive analytical method for the accurate determination of 5-methyltetrahydrofolic acid monoglutamate in various volumes of human plasma using isotope dilution ultra-high performance liquid chromatography-mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1179:122725. [PMID: 34311437 DOI: 10.1016/j.jchromb.2021.122725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 04/07/2021] [Accepted: 04/12/2021] [Indexed: 11/18/2022]
Abstract
One predominant and bioactive folate vitamer circulating in the blood is 5-methyltetrahydrofolate (5-Me-THF). In this study, a method for the accurate determination of 5-Me-THF in human plasma samples of various volumes was established using isotope dilution ultra-high performance liquid chromatography-mass spectrometry (ID-UPLC-MS). For this purpose, 500 μL of homogeneous human plasma was initially employed, and the 5-Me-THF and the 13C5-5-Me-THF standard solutions prepared using 1% ascorbic acid in water gave the calibration solution and spiking sample. The desired amount of 13C5-5-Me-THF standard solution was spiked into the sample followed by sample pretreatment. The method was validated for its repeatability, reproducibility, recovery, and limits of detection and quantification. Subsequently, it was applied to smaller volumes of human plasma samples (i.e., 50 and 10 μL), the results of which corresponded well with those obtained using 500 μL. The feasibility of the method was further confirmed using 10 μL of a standard reference material, SRM 3949, which is a human serum sample containing three different levels of 5-Me-THF. The established ID-UPLC-MS method was successfully applied to various volumes of human plasma or serum ranging from 500 to 10 μL, which exhibited particularly good sensitivity in addition to reliable results for the quantification of 5-Me-THF. Our method therefore expands on the ability to obtain accurate quantitative results for 5-Me-THF using small volumes of blood.
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Affiliation(s)
- Seok-Won Hyung
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea.
| | - Sunyoung Lee
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Jeesoo Han
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Joonhee Lee
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Song-Yee Beak
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Byungjoo Kim
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Kiwhan Choi
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Seonghee Ahn
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
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Xiang H, Guo F, Tao X, Zhou Q, Xia S, Deng D, Li L, Shang D. Pancreatic ductal deletion of S100A9 alleviates acute pancreatitis by targeting VNN1-mediated ROS release to inhibit NLRP3 activation. Theranostics 2021; 11:4467-4482. [PMID: 33754072 PMCID: PMC7977474 DOI: 10.7150/thno.54245] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 02/03/2021] [Indexed: 12/13/2022] Open
Abstract
Recent studies have proven that the overall pathophysiology of pancreatitis involves not only the pancreatic acinar cells but also duct cells, however, pancreatic duct contribution in acinar cells homeostasis is poorly known and the molecular mechanisms leading to acinar insult and acute pancreatitis (AP) are unclear. Our previous work also showed that S100A9 protein level was notably increased in AP rat pancreas through iTRAQ-based quantitative proteomic analysis. Therefore, we investigated the actions of injured duct cells on acinar cells and the S100A9-related effects and mechanisms underlying AP pathology in the present paper. Methods: In this study, we constructed S100A9 knockout (s100a9-/-) mice and an in vitro coculture system for pancreatic duct cells and acinar cells. Moreover, a variety of small molecular inhibitors of S100A9 were screened from ChemDiv through molecular docking and virtual screening methods. Results: We found that the upregulation of S100A9 induces cell injury and inflammatory response via NLRP3 activation by targeting VNN1-mediated ROS release; and loss of S100A9 decreases AP injury in vitro and in vivo. Moreover, molecular docking and mutant plasmid experiments proved that S100A9 has a direct interaction with VNN1 through the salt bridges formation of Lys57 and Glu92 residues in S100A9 protein. We further found that compounds C42H60N4O6 and C28H29F3N4O5S can significantly improve AP injury in vitro and in vivo through inhibiting S100A9-VNN1 interaction. Conclusions: Our study showed the important regulatory effect of S100A9 on pancreatic duct injury during AP and revealed that inhibition of the S100A9-VNN1 interaction may be a key therapeutic target for this disease.
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David V, Moldoveanu SC, Galaon T. Derivatization procedures and their analytical performances for HPLC determination in bioanalysis. Biomed Chromatogr 2020; 35:e5008. [PMID: 33084080 DOI: 10.1002/bmc.5008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 02/06/2023]
Abstract
Derivatization, or chemical structure modification, is often used in bioanalysis performed by liquid chromatography technique in order to enhance detectability or to improve the chromatographic performance for the target analytes. The derivatization process is discussed according to the analytical procedure used to achieve the reaction between the reagent and the target compounds (containing hydroxyl, thiol, amino, carbonyl and carboxyl as the main functional groups involved in derivatization). Important procedures for derivatization used in bioanalysis are in situ or based on extraction processes (liquid-liquid, solid-phase and related techniques) applied to the biomatrix. In the review, chiral, isotope-labeling, hydrophobicity-tailored and post-column derivatizations are also included, based on representative publications in the literature during the last two decades. Examples of derivatization reagents and brief reaction conditions are included, together with some bioanalytical applications and performances (chromatographic conditions, detection limit, stability and sample biomatrix).
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Affiliation(s)
- Victor David
- Faculty of Chemistry, Department of Analytical Chemistry, University of Bucharest, Bucharest, Romania
| | | | - Toma Galaon
- National Research and Development Institute for Industrial Ecology - ECOIND, Bucharest-6, Romania
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