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Jung E, Youn SH, Shin KY, Shin HJ, Yang JY, Yang Y, Jung JH, Kim Y. Investigation of symmetric dimethylarginine as a serologic marker for kidney function in striped skunks ( Mephitis mephitis). J Vet Sci 2024; 25:e52. [PMID: 39083204 PMCID: PMC11291430 DOI: 10.4142/jvs.24057] [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: 02/14/2024] [Revised: 06/27/2024] [Accepted: 07/03/2024] [Indexed: 08/03/2024] Open
Abstract
IMPORTANCE Kidney disease is prevalent among veterinary species, including zoo animals; however, investigations into this condition in striped skunks (Mephitis mephitis) are scarce. Diagnostic tools for kidney diseases in this species also remain limited. OBJECTIVE This study aimed to assess the utility of symmetric dimethylarginine as a biomarker for kidney disease in captive striped skunks in Korea. METHODS This retrospective study analysed 11 striped skunks housed at the Everland Zoo between 2017 and 2021. Blood samples were collected during health checks. Kidney function was assessed through blood analysis and diagnostic ultrasound, with necropsies conducted on deceased animals. Symmetric dimethylarginine levels were measured in 27 plasma samples collected from 11 skunks. RESULTS Over the study period, seven skunks were diagnosed with kidney disease. Analysis of 27 blood samples revealed a concurrent increase in SDMA levels with concentrations of blood urea nitrogen and blood creatinine. In 3 of the 7 skunks with kidney disease, symmetric dimethylarginine exceeded 14 µg/dL prior to the elevation of blood urea nitrogen and blood creatinine above the upper reference limit. CONCLUSIONS AND RELEVANCE To our knowledge, this is the first study investigating symmetric dimethylarginine in captive striped skunks in Korea. Our findings suggest that symmetric dimethylarginine may serve as an early and consistent biomarker for renal dysfunction in striped skunks. Further studies with larger clinical sample size from striped skunks are needed to validate the clinical utility of blood symmetric dimethylarginine concentration.
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Affiliation(s)
- Eun Jung
- Laboratory of Veterinary Clinical Pathology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
- Everland Animal Hospital, Yongin 17023, Korea
| | | | | | | | | | - Yeseul Yang
- Laboratory of Veterinary Clinical Pathology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
- BK21 PLUS Program for Creative Veterinary Science Research, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Jae-Ha Jung
- Laboratory of Veterinary Clinical Pathology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
- BK21 PLUS Program for Creative Veterinary Science Research, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Yongbaek Kim
- Laboratory of Veterinary Clinical Pathology, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea.
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Li Q, Zeng Y, Ai L, Wei M, Liu X, Zhao X, Zhang H, Guo X. Determination of six volatile fatty acids in human serum, urine and faeces by low temperature derivatisation combined with HPLC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1241:124172. [PMID: 38815357 DOI: 10.1016/j.jchromb.2024.124172] [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: 02/29/2024] [Revised: 05/13/2024] [Accepted: 05/23/2024] [Indexed: 06/01/2024]
Abstract
A stable isotope dilution-liquid chromatography tandem mass spectrometry method based on a low-temperature derivatization strategy with 3-nitrophenylhydrazine (3-NPH) was developed for the determination of six volatile fatty acids (VFAs) in serum, urine, and feces. Ice acetonitrile was used to precipitate proteins and extract the target analytes. The extract was derivatized with 3-NPH methanol solution at 4 °C. BEH C8 (1.7 μm, 2.1 × 100 mm) column was used for chromatographic separation, and acetonitrile-water (both containing 0.01 % formic acid) were used as the mobile phase with a gradient elution of 10 min. Electrospray ionization source (ESI) in negative ion multiple reaction monitoring (MRM) mode were used for analyte detection. The regression coefficients R2 of the calibration curves for the six VFAs were in the range of 0.9963-0.9994, and the LOQs were in the range of 0.02-0.5 μg mL-1, with the recoveries in the range of 85.3-104.3 %, and the intra- and inter-day precision in the range of 1.8-9.1 %. The method is simple, accurate and reliable, and has been applied in the sensitive determination of VFAs in complex biological samples.
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Affiliation(s)
- Qian Li
- School of Public Health, Hebei Medical University, Shijiazhuang 050017, China
| | - Yongfu Zeng
- School of Public Health, Hebei Medical University, Shijiazhuang 050017, China
| | - Lianfeng Ai
- School of Public Health, Hebei Medical University, Shijiazhuang 050017, China; Shijiazhuang Customs Technology Center, Shijiazhuang 050051, China
| | - Maolin Wei
- School of Public Health, Hebei Medical University, Shijiazhuang 050017, China
| | - Xiaomeng Liu
- College of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xiaochan Zhao
- School of Public Health, Hebei Medical University, Shijiazhuang 050017, China
| | - Haoran Zhang
- Hebei Qianye Biotechnology Co, Shijiazhuang 050000, China
| | - Xiujuan Guo
- Hebei Medical University Fourth Hospital, Shijiazhuang 050011, China.
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Li Z, Li Y, Cheng W. Determination of cinnamaldehyde, thymol and eugenol in essential oils by LC-MS/MS and antibacterial activity of them against bacteria. Sci Rep 2024; 14:12424. [PMID: 38816435 PMCID: PMC11139912 DOI: 10.1038/s41598-024-63114-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 05/24/2024] [Indexed: 06/01/2024] Open
Abstract
Plant essential oils contain many secondary metabolites, some of which can effectively inhibit the growth of pathogenic microorganisms, so it is a very promising antibacterial agent. In this study, a qualitative and quantitative method based on high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed for the simultaneous determination of three bioactive substances, cinnamaldehyde (CNM), thymol (THY), and eugenol (EUG), in the essential oils of plants. Necessary tests for linearity, limit of quantification, recovery, carryover contamination and precision of the method were carried out. Then, the antibacterial activity of 3 bioactive compounds against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) was evaluated by minimal inhibitory concentration and the synergistic antimicrobial effect. The results indicated that CNM, THY and EUG had good antibacterial activity. According to the results of fractional inhibitory concentration index (FICI), it is considered that CNM + THY and CNM + THY + EUG has obvious synergistic inhibitory effect on E. coli, and CNM + THY and CNM + EUG has obvious synergistic inhibitory effect on S. aureus. Finally, we analyzed the effect of the bioactive compounds on trace elements in bacteria and found significant changes in magnesium, calcium, copper and iron.
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Affiliation(s)
- Zhi Li
- Tianjin Guoke Medical Technology Development Co., LTD, Tianjin, 300399, China
| | - Yan Li
- Tianjin Guoke Medical Technology Development Co., LTD, Tianjin, 300399, China
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, 215163, China
| | - Wenbo Cheng
- Tianjin Guoke Medical Technology Development Co., LTD, Tianjin, 300399, China.
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, 215163, China.
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Li J, Xu A, Xue J, Qian W, Xu P, Hu Z, Chen C, Wu C. Development and validation of a deep eutectic solvent-assisted liquid-liquid extraction method for simultaneous quantification of six steroid hormones in serum by liquid chromatography-tandem mass spectrometry. J Chromatogr A 2023; 1710:464413. [PMID: 37806044 DOI: 10.1016/j.chroma.2023.464413] [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: 07/05/2023] [Revised: 09/13/2023] [Accepted: 09/24/2023] [Indexed: 10/10/2023]
Abstract
Steroid hormones have been reported to be associated with endocrine system diseases. This paper proposes a novel procedure of deep eutectic solvent (DES)-assisted liquid-liquid extraction (LLE) to extract six steroid hormones (including cortisone, cortisol, androstenedione, testosterone, 17-hydroxyprogesterone, and progesterone) from serum coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS). A total of five types of L-proline, choline chloride, and citric acid-based DESs were tailored; the DES from L-proline and ethylene glycol at a molar ratio of 1:4 with 20 % acetonitrile was selected as the best-fit assisted solvent for the six steroid hormones compared with other DESs. The parameters for extraction by selected DES were optimized using Box-Behnken design (BBD), and the optimal extraction conditions are 200 µL of acetonitrile, 100 µL of the sample, and 80 µL of DES. Under optimum conditions, the method has good linear calibration ranges (between 0.07 ng mL-1 and 600 ng mL-1), correlation coefficients of determination (r2>0.99), and low limits of quantification (between 0.02 and 0.60 ng mL-1). The extraction recoveries were in the range of 81.84-114.43 %, and the intra-day and inter-day relative standard deviations (RSDs) were less than 10 %.In general, the DES-LC-MS/MS method is a simple and environmentally-friendly method, which can be complementary to the presently available methods for determining steroid hormones in serum.
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Affiliation(s)
- Jufang Li
- Zhejiang Biozon Medical Technology Co., Ltd, Hangzhou, Zhejiang 310000, China
| | - Aiping Xu
- Laprode (Zhejiang) Analysis Co., Ltd, Hangzhou, Zhejiang 310000, China
| | - Jianyou Xue
- Zhejiang Biozon Medical Technology Co., Ltd, Hangzhou, Zhejiang 310000, China
| | - Wei Qian
- Zhejiang Biozon Medical Technology Co., Ltd, Hangzhou, Zhejiang 310000, China
| | - Ping Xu
- Zhejiang Biozon Medical Technology Co., Ltd, Hangzhou, Zhejiang 310000, China
| | - Zhineng Hu
- Zhejiang Biozon Medical Technology Co., Ltd, Hangzhou, Zhejiang 310000, China
| | - Chen Chen
- Department of Clinical Laboratory, Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, Jiangsu 210004, China.
| | - Chaochao Wu
- Zhejiang Biozon Medical Technology Co., Ltd, Hangzhou, Zhejiang 310000, China.
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Brans M, Marynissen S, Mortier F, Duchateau L, Daminet S, Paepe D. Effect of storage temperature and time on measurement of serum symmetric dimethylarginine concentration using point-of-care and commercial laboratory analyzers in cats and dogs. J Vet Intern Med 2023; 37:1794-1805. [PMID: 37565515 PMCID: PMC10472997 DOI: 10.1111/jvim.16811] [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: 10/13/2022] [Accepted: 07/03/2023] [Indexed: 08/12/2023] Open
Abstract
BACKGROUND Stability of serum symmetric dimethylarginine (sSDMA) during short- and long-term storage has not been assessed for the immunoassay of the Point-of-Care IDEXX Catalyst DX (POC) analyzer and the Enzyme Multiplied Immunoassay Technique of IDEXX commercial laboratory (CL). Also, the agreement between both analyzers is questioned. OBJECTIVES To determine (a) the effect of storage time and temperature on sSDMA measured by POC and CL; (b) the agreement between sSDMA measured by POC and CL; and (c) the imprecision of the POC. ANIMALS Serum of cats (n = 17) and dogs (n = 18) with a range of SDMA concentrations (6 to >100 μg/dL). METHODS Based on an equivalence trial with predefined equivalence range (-3.0 to +3.0 μg/dL) and using T0 as baseline, stability was evaluated after 24 hours at 22°C and 4°C (POC); after 7 days at 4°C (POC and CL) and after 10 and 24 months at -24°C and -80°C (CL). Bland-Altman plots enabled method comparison. Imprecision of the POC was assessed by duplicate sSDMA measurements at T0. RESULTS The POC analyzer produced equivalent sSDMA measurements if samples were stored for 24 hours at 4°C (95% confidence interval [CI]: -2.5-2.0 μg/dL), but not when stored for 24 hours at room temperature (RT; 95% CI: -4.1 to 0.5 μg/dL) or after 7 days at 4°C (95% CI: -3.6-1.0 μg/dL). The CL analyzer was less affected by preanalytical variation with clinically similar results obtained when samples were stored for 7 days at 4°C (95% CI: -2.2 to 2.4 μg/dL) and for at least 24 months at -24°C (95% CI: -1.7 to 2.9 μg/dL) and -80°C (95% CI: -1.5 to 3 μg/dL). A relevant mean difference of -2.3 μg/dL between both analyzers was found. Duplicate POC measurements were equivalent (95% CI: -2.6 to 2.0 μg/dL). CONCLUSIONS Delayed analysis may significantly change sSDMA depending on storage and measurement conditions. Interchangeable use of assays should be done with caution because analytical variation could be interpreted as clinically relevant change.
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Affiliation(s)
- Marleen Brans
- Small Animal Department, Faculty of Veterinary MedicineGhent UniversityGhentBelgium
| | - Sofie Marynissen
- Small Animal Department, Faculty of Veterinary MedicineGhent UniversityGhentBelgium
| | - Femke Mortier
- Small Animal Department, Faculty of Veterinary MedicineGhent UniversityGhentBelgium
| | - Luc Duchateau
- Department of Morphology, Imaging, Orthopedics, Rehabilitation, and NutritionGhent UniversityGhentBelgium
| | - Sylvie Daminet
- Small Animal Department, Faculty of Veterinary MedicineGhent UniversityGhentBelgium
| | - Dominique Paepe
- Small Animal Department, Faculty of Veterinary MedicineGhent UniversityGhentBelgium
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Zou H, Liu M, Li Y, Zhao F, Ren G. An efficient LC-MS/MS method for simultaneous determination of four substances in the Hcy metabolism pathway. Bioanalysis 2023; 15:727-737. [PMID: 37354095 DOI: 10.4155/bio-2023-0049] [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] [Indexed: 06/26/2023] Open
Abstract
Aim: This study aimed to develop and validate an efficient LC-MS/MS method for the simultaneous determination of Hcy, Cys, Met and 5-methyltetrahydrofolate in human serum and to apply this method to patients with coronary artery disease. Methodology and results: Serum samples were prepared by reduction with dithiothreitol followed by protein precipitation. The analytical run time was 2.2 min. The linearity was good in the range of 2-100 μmol/l-1 for Hcy and Met, 10-500 μmol/l-1 for Cys, and 1-50 ng/ml-1 for 5-methyltetrahydrofolate. Conclusion: An accurate and precise method that was rapid, robust and with high-throughput for the routine clinical monitoring of patients with coronary artery disease was developed.
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Affiliation(s)
- Hongyang Zou
- Jinzhou Medical University, Jinzhou, 121000, China
| | - Mingli Liu
- Dalian Boyuan Medical Lab Co. Ltd, Dalian, 116000, China
| | - Ying Li
- Dalian Boyuan Medical Lab Co. Ltd, Dalian, 116000, China
| | - Furong Zhao
- Dalian Boyuan Medical Lab Co. Ltd, Dalian, 116000, China
| | - Guocheng Ren
- Jinzhou Medical University, Jinzhou, 121000, China
- Chaoyang Central Hospital, Chaoyang, 122000, China
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Huang Q, Liu Y, Cheng Y, Jia F, Pu C, Yan Q, Chang Z, Liao P, Ma D, Xu L, Zhang H, Lu Y, Liu X, Liu K. High-throughput quantitation of serological dimethylarginines by LC/MS/MS: Potential cardiovascular biomarkers for rheumatoid arthritis. J Pharm Biomed Anal 2023; 232:115336. [PMID: 37159983 DOI: 10.1016/j.jpba.2023.115336] [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: 01/12/2023] [Revised: 03/01/2023] [Accepted: 03/10/2023] [Indexed: 05/11/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disorder characterized by systemic inflammation of the joints and extra-articular tissues. The incidence of cardiovascular disease (CVD) remains the main cause of morbidity and mortality in patients with RA. Despite the development of new therapeutics targeting the articular manifestations, the relief of the cardiovascular burden is still an unmet medical need during the management of RA. So, the early prognosis of RA-associated CVD plays a crucial role in improving the clinical outcomes of RA patients. Recently, circulating dimethylarginines have gained attention as potential biomarkers for CVDs. Here, we present the development and validation of a high-throughput liquid chromatography-tandem mass spectrometric (LC/MS/MS) method for simultaneous quantification of creatinine, arginine, and dimethylarginines in human serum within 2 mins by isotope dilution mass spectrometry. This method employed a protein precipitation method for rapid sample preparation, trichloroacetic acid (TCA)-based ion pairing chromatography for fast analyte separation, and multiple reaction monitoring (MRM) with stable isotope-labeled internal standards (ISs) for simultaneous quantitation. To assure the quality, our method was validated against the FDA guidelines for lower limit of quantitation (0.2 µM), linearity (square of coefficient correlation>0.99), precision (intra-&inter-assay imprecision < 10 %), accuracy (intra-&inter-assay inaccuracy < 10 %), sample preparation recovery (recovery ≥ 90 %), stability (instability < 10 %), matrix effect (signal suppression < 55 %), and carryover ( < 0.01 %). Afterward, we applied the validated method to a retrospective cross-sectional study. We aimed to evaluate the utility of serological dimethylarginines as potential cardiovascular biomarkers in the development of RA-associated CVD. Our results revealed that the serological ratio of asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA), an indicator of physiological arginine methylation status, was significantly elevated in patients with RA. This finding might provide value in detecting CVD to improve clinical outcomes in RA management.
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Affiliation(s)
- Qianyang Huang
- Shenzhen Kanghua Juntai Biotech Co. Ltd., B 215, Unit No.7, Shahe Rd W, Nanshan, Shenzhen, Guangdong Province 518063, China
| | - Ying Liu
- Physical Examination Center, Yuebei People's Hospital, Wu Jiang Qu, Shao Guan Shi, Guangzhou 512027, China
| | - Yuna Cheng
- Shanghai Center for Disease Control and Prevention, Chang Ning Qu, Shang Hai Shi, 200051, China
| | - Fujian Jia
- Shenzhen Kanghua Juntai Biotech Co. Ltd., B 215, Unit No.7, Shahe Rd W, Nanshan, Shenzhen, Guangdong Province 518063, China
| | - Chunchao Pu
- Shenzhen Kanghua Juntai Biotech Co. Ltd., B 215, Unit No.7, Shahe Rd W, Nanshan, Shenzhen, Guangdong Province 518063, China
| | - Qinghua Yan
- Shanghai Center for Disease Control and Prevention, Chang Ning Qu, Shang Hai Shi, 200051, China
| | - Zhaoyu Chang
- Shanghai Center for Disease Control and Prevention, Chang Ning Qu, Shang Hai Shi, 200051, China
| | - Ping Liao
- Shanghai Center for Disease Control and Prevention, Chang Ning Qu, Shang Hai Shi, 200051, China
| | - Dandan Ma
- Shenzhen Kanghua Juntai Biotech Co. Ltd., B 215, Unit No.7, Shahe Rd W, Nanshan, Shenzhen, Guangdong Province 518063, China
| | - Lei Xu
- Shenzhen Kanghua Juntai Biotech Co. Ltd., B 215, Unit No.7, Shahe Rd W, Nanshan, Shenzhen, Guangdong Province 518063, China
| | - Hua Zhang
- Shenzhen Kanghua Juntai Biotech Co. Ltd., B 215, Unit No.7, Shahe Rd W, Nanshan, Shenzhen, Guangdong Province 518063, China
| | - Yuanzhi Lu
- Department of Pathology, The First Affiliated Hospital of Jinan University, Tianhe Qu, Guangzhou 510632, China
| | - Xin Liu
- Shenzhen Kanghua Juntai Biotech Co. Ltd., B 215, Unit No.7, Shahe Rd W, Nanshan, Shenzhen, Guangdong Province 518063, China.
| | - Kang Liu
- Shenzhen Kanghua Juntai Biotech Co. Ltd., B 215, Unit No.7, Shahe Rd W, Nanshan, Shenzhen, Guangdong Province 518063, China.
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A method for quantifying hepatic and intestinal ceramides on mice by UPLC-MS/MS. Anal Biochem 2023; 661:114982. [PMID: 36375519 DOI: 10.1016/j.ab.2022.114982] [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: 09/28/2022] [Revised: 11/01/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022]
Abstract
BACKGROUND Ceramide is one type of sphingolipids, is associated with the occurrence of metabolic diseases, including obesity, diabetes, cardiovascular disease, cancer, and nonalcoholic fatty liver disease. Dihydroceramide, the direct precursors of ceramide, which is converted to ceramide with the dihydroceramide desaturase, is recently regarded as involving in various biological processes and metabolic diseases. The liver and gut ceramide levels are interactional in pathophysiological condition, quantifying hepatic and intestinal ceramide levels become indispensable. The aim of this study is to establish a rapid method for the determination of ceramides including dihydroceramides in liver and small intestinal tissues for researching the mechanisms of ceramide related diseases. METHODS The levels of Cer d18:1/2:0, Cer d18:1/6:0, Cer d18:1/12:0, Cer d18:1/14:0, Cer d18:1/16:0, Cer d18:1/17:0, Cer d18:1/18:0, Cer d18:1/20:0, Cer d18:1/22:0, Cer d18:1/24:1, Cer d18:1/24:0, dHCer d18:0/12:0, dHCer d18:0/14:0, dHCer d18:0/16:0, dHCer d18:0/18:0, dHCer d18:0/24:1 and dHCer d18:0/24:0 in mice liver and small intestine were directly quantified by ultra-high performance liquid chromatography-tandem mass spectrometry after methanol extraction. In detail, liver or small intestine tissues were thoroughly homogenized with methanol. The resultant ceramides were separated on a Waters BEH C18 column using gradient elution within 10 min. Positive electrospray ionization with multiple reaction monitoring was applied to detect. In the end, the levels of ceramides in mice liver and small intestine tissues were quantified by this developed method. RESULTS The limits of detection and quantification of 11 ceramides and 6 dihydroceramides were 0.01-0.5 ng/mL and 0.02-1 ng/mL, respectively, and all detected ceramides had good linearities (R2 > 0.997). The extraction recoveries of ceramides at three levels were within 82.32%-115.24% in the liver and within 83.21%-118.70% in the small intestine. The relative standard deviations of intra- and inter-day precision were all within 15%. The extracting solutions of the liver and small intestine could be stably stored in the autosampler 24 h at 10 °C, the lyophilized liver and small intestine for ceramides quantification could be stably stored at least 1 week at -80 °C. The ceramides and dihydroceramides in normal mice liver and small intestinal tissues analyzed by the developed method indicated that the detected 9 ceramide and 5 dihydroceramides levels were significantly different, in which Cer d18:1/16:0, Cer d18:1/22:0, Cer d18:1/24:1, Cer d18:1/24:0 and dHCer d18:0/24:1 are the main components in the liver, whereas Cer d18:1/16:0 and dHCer d18:0/16:0 accounts for the majority of proportion in the intestinal tissues. CONCLUSION A simple and rapid method for the quantification of 11 ceramides and 6 dihydroceramides in the animal tissues was developed and applied. The compositions of ceramides in two tissues suggested that the compositional features should to be considered when exploring the biomarkers or molecular mechanisms.
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Parthasarathy S, Soundararajan P, Sakthivelu M, Karuppiah KM, Velusamy P, Gopinath SC, Pachaiappan R. The role of prognostic biomarkers and their implications in early detection of preeclampsia: A systematic review. Process Biochem 2023. [DOI: 10.1016/j.procbio.2023.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Bonnitcha P, Sullivan D, Fitzpatrick M, Ireland A, Nguyen VL, Koay YC, O'Sullivan J. Design and validation of an LC-MS/MS method for simultaneous quantification of asymmetric dimethylguanidino valeric acid, asymmetric dimethylarginine and symmetric dimethylarginine in human plasma. Pathology 2022; 54:591-598. [DOI: 10.1016/j.pathol.2022.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 01/11/2022] [Accepted: 01/20/2022] [Indexed: 10/18/2022]
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Michael H, Szlosek D, Clements C, Mack R. Symmetrical Dimethylarginine: Evaluating Chronic Kidney Disease in the Era of Multiple Kidney Biomarkers. Vet Clin North Am Small Anim Pract 2022; 52:609-629. [DOI: 10.1016/j.cvsm.2022.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sun Y, Zhu B, Meng X, Yin B, Wu K, Liu Y, Zou D, Xue J, Sun X, Zhang D, Ma Z. Effect of maternal body mass index on the steroid profile in women with gestational diabetes mellitus. Front Endocrinol (Lausanne) 2022; 13:999154. [PMID: 36440200 PMCID: PMC9681895 DOI: 10.3389/fendo.2022.999154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/24/2022] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVE To explore the effect of maternal body mass index (BMI) on steroid hormone profiles in women with gestational diabetes mellitus (GDM) and those with normal glucose tolerance (NGT). METHODS We enrolled 79 women with NGT and 80 women with GDM who had a gestational age of 24-28 weeks. The participants were grouped according to their BMI. We quantified 11 steroid hormones profiles by liquid chromatography-tandem mass spectrometry and calculated the product-to-precursor ratios in the steroidogenic pathway. RESULTS Women with GDM and BMI<25kg/m2 showed higher concentrations of dehydroepiandrosterone (DHEA) (p<0.001), testosterone (T) (p=0.020), estrone (E1) (p=0.010) and estradiol (E2) (p=0.040) and lower Matsuda index and HOMA-β than women with NGT and BMI<25kg/m2. In women with GDM, concentrations of E1 (p=0.006) and E2 (p=0.009) declined, accompanied by reduced E2/T (p=0.008) and E1/androstenedione (A4) (p=0.010) in the BMI>25 kg/m2 group, when compared to that in the BMI<25 kg/m2 group. The values of E2/T and E1/A4 were used to evaluate the cytochrome P450 aromatase enzyme activity in the steroidogenic pathway. Both aromatase activities negatively correlated with the maternal BMI and positively correlated with the Matsuda index in women with GDM. CONCLUSIONS NGT women and GDM women with normal weight presented with different steroid hormone profiles. Steroidogenic pathway profiling of sex hormones synthesis showed a significant increase in the production of DHEA, T, E1, and E2 in GDM women with normal weight. Additionally, the alteration of steroid hormone metabolism was related to maternal BMI in women with GDM, and GDM women with overweight showed reduced estrogen production and decreased insulin sensitivity compared with GDM women with normal weight.
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Affiliation(s)
- Yanni Sun
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Clinical Prenatal Diagnosis Center, Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Bo Zhu
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Clinical Prenatal Diagnosis Center, Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xingjun Meng
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Clinical Prenatal Diagnosis Center, Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Binbin Yin
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Clinical Prenatal Diagnosis Center, Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Kaiqi Wu
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Clinical Prenatal Diagnosis Center, Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yifeng Liu
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Women’s Reproductive Health of Zhejiang Province, and Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Dandan Zou
- Hangzhou BIOZON Medical Laboratory co. Ltd., Hangzhou, Zhejiang, China
| | - Jianyou Xue
- Hangzhou BIOZON Medical Laboratory co. Ltd., Hangzhou, Zhejiang, China
| | - Xiao Sun
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Women’s Reproductive Health of Zhejiang Province, and Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Dan Zhang
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Women’s Reproductive Health of Zhejiang Province, and Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- *Correspondence: Zhixin Ma, ; Dan Zhang,
| | - Zhixin Ma
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Clinical Prenatal Diagnosis Center, Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- *Correspondence: Zhixin Ma, ; Dan Zhang,
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Hamlin DM, Schultze AE, Coyne MJ, McCrann DJ, Mack R, Drake C, Murphy RE, Cross J, Strong-Townsend M, Yerramilli M, Leissinger MK. Evaluation of Renal Biomarkers, Including Symmetric Dimethylarginine, following Gentamicin-Induced Proximal Tubular Injury in the Rat. KIDNEY360 2021; 3:341-356. [PMID: 35373128 PMCID: PMC8967625 DOI: 10.34067/kid.0006542020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 12/03/2021] [Indexed: 01/10/2023]
Abstract
Symmetric dimethylarginine (SDMA) is an excretory renal function biomarker shown to correlate well with glomerular filtration rate in dogs, cats, humans, and rats. The objectives of this study were to determine utility of serum SDMA as a renal biomarker in a rat model of gentamicin-induced renal injury and to provide validation of a commercially available SDMA immunoassay for rat serum. Rats were randomly assigned to one of three dose levels of gentamicin (20, 50, or 100 mg/kg) or a vehicle control group and dosed once daily by subcutaneous injection for either four or ten days. Serum and urine renal biomarker evaluation, including serum SDMA, hematologic and serum biochemical analysis, urinalysis, and histologic examination of kidney, were performed. Before biologic validation, analytic validation of the SDMA immunoassay for rat serum was performed, including assessment of assay accuracy, precision, analytical sensitivity, linearity, analyte stability, and interference testing. Among markers of excretory renal function, SDMA and serum creatinine increased earliest and at the lowest gentamicin concentrations and were significantly increased in both the 50- and 100- mg/kg dose levels in the four- and ten-dose treatment groups compared with controls. Time- and dose-dependent increases were noted for all urinary biomarkers investigated in this study, with microalbumin being most responsive and osteopontin least responsive for detection of gentamicin-induced injury across dose levels and schedules investigated. The SDMA immunoassay met all set quality requirements assessed in analytical validation. This study is the first to investigate performance of serum SDMA compared with other excretory renal function markers in a rat gentamicin acute toxicity model. In this study, serum SDMA was an earlier biomarker for detection of gentamicin-induced toxicity than serum cystatin C, BUN, and creatinine clearance. The SDMA immunoassay provides a reliable commercially available assay for future renal investigations in rat models.
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Affiliation(s)
- Diane M. Hamlin
- Pathology Department, Toxicology Division, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana
| | - A. Eric Schultze
- Pathology Department, Toxicology Division, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana
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Eryavuz Onmaz D, Abusoglu S, Yaglioglu H, Abusoglu G, Unlu A. Developing a robust, fast and reliable measurement method for the analysis of methylarginine derivatives and related metabolites. J Mass Spectrom Adv Clin Lab 2021; 19:34-45. [PMID: 34820664 PMCID: PMC8601011 DOI: 10.1016/j.jmsacl.2021.02.002] [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: 08/09/2020] [Revised: 02/17/2021] [Accepted: 02/19/2021] [Indexed: 11/21/2022] Open
Abstract
Background Nitric oxide (NO) plays an important role in endothelial homeostasis. Asymmetric dimethyl arginine (ADMA), L-N monomethyl arginine (L-NMMA) and symmetric dimethyl arginine (SDMA), which are derivatives of methylarginine, directly or indirectly reduce NO production. Therefore, these metabolites are an important risk factor for various diseases, including cardiovascular diseases. Numerous methods have been developed for the measurement of methylarginine derivatives, but various difficulties have been encountered. This study aimed to develop a reliable, fast and cost-effective method for the analysis and measurement of methylarginine derivatives (ADMA, SDMA, L-NMMA) and related metabolites (arginine, citrulline, homoarginine, ornithine), and to validate this method according to Clinical and Laboratory Standards Institute (CLSI) protocols. Methods For the analysis of ADMA, SDMA, L-NMMA, arginine, homoarginine, citrulline, ornithine, 200 µl of serum were precipitated with methanol, and subsequently derivatized with a butanol solution containing 5% acetyl chloride. Butyl derivatives were separated using a C18 reverse phase column with a 5 min run time. Detection of analytes was achieved by utilising the specific fragmentation patterns identified through tandem mass spectrometry. Results The method was linear for ADMA, SDMA, L-NMMA, ornithine, arginine, homoarginine and citrulline in the ranges of 0.023–6.0, 0.021–5.5, 0.019–5.0, 0.015–250, 0.015–250, 0.019–5 and 0.015–250 µM, respectively. The inter-assay CV% values for all analytes was less than 9.8%. Conclusions Data obtained from method validation studies shows that the developed method is highly sensitive, precise and accurate. Short analysis time, cost-effectiveness, and multiplexed analysis of these metabolites, with the same pretreatment steps, are the main advantages of the method.
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Key Words
- ADMA
- ADMA, asymmetric dimethyl arginine
- CE, capillary electrophoresis
- CE, collision energy
- CLSI, The Clinical & Laboratory Standards Institute
- CXP, collision cell exit potential
- DDAH, dimethylaminohydrolase
- DP, declustering potential
- EP, enterance potential
- FDA, Food and Drug Administration
- GC–MS, gas chromatography–mass spectrometry
- HPLC, high performance liquid chromatography
- L-NMMA, L-N monomethyl arginine
- LC-MS, liquid chromatography–mass spectrometry
- LC-MS/MS, liquid chromatography tandem-mass spectrometry
- MRM, multiple reaction monitoring
- Methylarginines
- NO, nitric oxide
- NOS, nitric oxide synthase
- PRMTs, protein arginine methyltransferases
- SDMA, symmetric dimethyl arginine
- Tandem mass spectrometry
- Validation
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Affiliation(s)
- Duygu Eryavuz Onmaz
- Department of Biochemistry, Selcuk University Faculty of Medicine, Konya, Turkey
| | - Sedat Abusoglu
- Department of Biochemistry, Selcuk University Faculty of Medicine, Konya, Turkey
| | - Havva Yaglioglu
- Department of Biochemistry, Selcuk University Faculty of Medicine, Konya, Turkey
| | - Gulsum Abusoglu
- Department of Medical Laboratory Techniques, Selcuk University Vocational School of Health, Konya, Turkey
| | - Ali Unlu
- Department of Biochemistry, Selcuk University Faculty of Medicine, Konya, Turkey
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USE OF SYMMETRIC DIMETHYLARGININE TO DETECT RENAL LESIONS IN FISH: A PRELIMINARY STUDY IN BROOK TROUT ( SALVELINUS FONTINALIS). J Zoo Wildl Med 2021; 52:1024-1029. [PMID: 34687520 DOI: 10.1638/2020-0218] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2021] [Indexed: 11/21/2022] Open
Abstract
Symmetric dimethylarginine (SDMA) is an early marker for renal lesions in mammals. The objectives of this study were 1) to establish a reference interval of SDMA in healthy brook trout, Salvelinus fontinalis (Mitchill, 1814), and 2) to assess its sensibility as a marker of renal pathology. Plasma SDMA was quantified by liquid chromatography-mass spectrometry in 25 adult brook trout, including 20 fish displaying no renal histologic lesions, and five fish displaying chronic nonactive microscopic granulomas. The fish size (P = 0.30) and weight (P = 0.12) were not statistically different among groups, nor were SDMA values (P = 0.22). However, brook trout without microscopic renal lesions tended to have lower SDMA values (no lesions: mean = 24.9 µg/dL; lesions: mean = 31.4 µg/dL). The reference interval (90% confidence interval [90% CI]) for SDMA concentration in brook trout ranged between 10.0 µg/dL (90% CI: 5.4-14.7) and 39.8 µg/dL (90% CI: 34.8-43.9). These values were higher than those previously reported in other vertebrate species. Further research is needed to evaluate the use of SDMA as a marker of renal function in fishes.
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Pan Q, Shen M, Yu T, Yang X, Li Q, Zhao B, Zou J, Zhang M. Liquid chromatography as candidate reference method for the determination of vitamins A and E in human serum. J Clin Lab Anal 2020; 34:e23528. [PMID: 33090556 PMCID: PMC7755822 DOI: 10.1002/jcla.23528] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 07/13/2020] [Accepted: 07/15/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Owing to the increasing interest in public health research of antioxidant micronutrients and the inaccuracy of routine serum concentrations of the fat-soluble vitamins A (retinol) and E (DL-α-tocopherol) measurements, we developed a reliable, highly sensitive, robust and rapid method for the quantification of two clinically important lipophilic antioxidants in serum using a reverse-phase HPLC/DAD method. METHOD Sample preparation and analytical conditions that would affect extraction efficiency and quantitative results of vitamins A and E were investigated and optimized. Vitamins A and E were extracted from serum via liquid-liquid extraction (LLE). After adequate sample preparation, the samples were injected directly into the HPLC system with diode-array detector (DAD). Chromatographic separation was completed in 7 minutes for vitamins A and E. With vitamin A acetate and vitamin E acetate as internal standards, the method was applied to the measurement of vitamins A and E in human serum. RESULTS We evaluated method linearity, accuracy (recovery rate and trueness), precision, carryover, limit of quantitation and limit of detection, and measurement uncertainty. The method was evaluated for trueness using NIST Standard Reference Material SRM 968f. The serum concentration of the studied compounds had a good linear relationship in the range of 0.05 ~ 3.0 μg/mL concentration (r = 0.9998), with 0.0077 μg/mL detection limit and 0.025 μg/mL quantitative limit for vitamin A, respectively, and 1.0 ~ 60.0 μg/mL concentration (r = 0.9999), with 0.40 μg/mL detection limit and 0.50 μg/mL quantitative limit for vitamin E, respectively. The intra- and inter-assay coefficients of variation were calculated by using three concentrations (1, 2, and 3) of the studied compounds in human serum samples. Intra-assay and inter-assay precision were 1.23%-4.97% and 0.97%-3.79% for vitamin A, respectively, and 0.64%-4.07% and 0.81%-5.96% for vitamin E, respectively. The average recovery rates were 100.98% for vitamin A, and 99.21% for vitamin E, respectively. The carryover rate of vitamins A and E was below 1%. As for the evaluation of accuracy, the biases were <± 5% by comparing with NIST standard reference material SRM 968f. CONCLUSION The method is a simple sample treatment procedure for the determination of fat-soluble vitamins A and E in human serum with high sensitivity and specificity. The proposed method could be recommended as a candidate reference method for the determination of serum concentrations of the fat-soluble vitamins A and E in human serum.
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Affiliation(s)
- Qingqing Pan
- Reference LaboratoryMedicalSystem Biotechnology Co., Ltd. NingboNingboChina
| | - Min Shen
- Reference LaboratoryMedicalSystem Biotechnology Co., Ltd. NingboNingboChina
- Department of Clinical LaboratoryBeijing Shijitan HospitalBeijingChina
| | - Ting Yu
- Division of In Vitro Diagnostics for Non‐infectious diseasesNational Institutes for Food and Drug ControlBeijingChina
| | - Xiaodong Yang
- Reference LaboratoryMedicalSystem Biotechnology Co., Ltd. NingboNingboChina
| | - Quanle Li
- Reference LaboratoryMedicalSystem Biotechnology Co., Ltd. NingboNingboChina
| | - Beibei Zhao
- Independent Clinical LaboratoryGuangzhou Kingmed Diagnostics Group Co., Ltd.GuangzhouChina
| | - Jihua Zou
- Reference LaboratoryMedicalSystem Biotechnology Co., Ltd. NingboNingboChina
| | - Man Zhang
- Department of Clinical LaboratoryBeijing Shijitan HospitalBeijingChina
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Roggensack T, Merz B, Dick N, Bub A, Krüger R. Targeted ultra-performance liquid chromatography/tandem mass spectrometric quantification of methylated amines and selected amino acids in biofluids. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8646. [PMID: 31674086 DOI: 10.1002/rcm.8646] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/23/2019] [Accepted: 10/27/2019] [Indexed: 06/10/2023]
Abstract
RATIONALE Methylated amino compounds and basic amino acids are important analyte classes with high relevance in nutrition, physical activity and physiology. Reliable and easy quantification methods covering a variety of metabolites in body fluids are a prerequisite for efficient investigations in the field of food and nutrition. METHODS Targeted ultra-performance liquid chromatography/tandem mass spectrometric (UHPLC/MS) analysis was performed using HILIC separation and timed ESI-MRM detection, combined with a short sample preparation. Calibration in urine and blood plasma was achieved by matrix-matched standards, isotope-labelled internal standards and standard addition. The method was fully validated and the performance was evaluated using a subset from the Karlsruhe Metabolomics and Nutrition (KarMeN) study. RESULTS Within this method, a total of 30 compounds could be quantified simultaneously in a short run of 9 min in both body fluids. This covers a variety of free amino compounds which are present in very different concentrations. The method is easy, precise and robust, and has a broad working range. As a proof of principle, literature-based associations of certain metabolites with dietary intake of respective foods were clearly confirmed in the KarMeN subset. CONCLUSIONS Overall, the method turned out to be well suited for application in nutrition studies, as shown for the example of food intake biomarkers in KarMeN. Application to a variety of questions such as food-related effects or physical activity will support future studies in the context of nutrition and health.
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Affiliation(s)
- Tim Roggensack
- Department of Physiology and Biochemistry of Nutrition, Max Rubner-Institut, Karlsruhe, Germany
| | - Benedikt Merz
- Department of Physiology and Biochemistry of Nutrition, Max Rubner-Institut, Karlsruhe, Germany
| | - Niels Dick
- Department of Physiology and Biochemistry of Nutrition, Max Rubner-Institut, Karlsruhe, Germany
| | - Achim Bub
- Department of Physiology and Biochemistry of Nutrition, Max Rubner-Institut, Karlsruhe, Germany
| | - Ralf Krüger
- Department of Physiology and Biochemistry of Nutrition, Max Rubner-Institut, Karlsruhe, Germany
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Pre-Analytical and Clinical Validation of a Dried Blood Spot Assay for Asymmetric Dimethylarginine and L-Arginine. J Clin Med 2020; 9:jcm9041072. [PMID: 32283799 PMCID: PMC7230730 DOI: 10.3390/jcm9041072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/07/2020] [Accepted: 04/08/2020] [Indexed: 02/07/2023] Open
Abstract
Asymmetric dimethylarginine (ADMA) inhibits nitric oxide (NO) synthesis. It is a risk marker for cardiovascular events and mortality in patients with cardiometabolic diseases and in population-based studies. Plasma or serum analysis of ADMA may be hampered by pre-analytical sample handling. We validated a dried blood spot (DBS) assay for ADMA and L-arginine and show here that this assay has excellent variabilities and reproducibilities. Filter paper is impregnated with the arginase inhibitor nor-NOHA (Nω-hydroxy-nor-Arginine) to avoid L-arginine degradation. Clinical validation of this DBS assay confirms elevated ADMA concentration in hemodialysis patients as compared to healthy controls, higher ADMA concentrations in men versus women, and elevated L-arginine concentration in subjects supplemented with L-arginine. The DBS assay was used in a cohort study involving 100 primarily healthy subjects in the Andean region to assess the impact of chronic intermittent hypoxia on ADMA and L-arginine; ADMA DBS concentration at sea level was prospectively associated with pulmonary hypertension after six months of exposure to 3500 m. In a cohort of 753 individuals, L-arginine/ADMA ratio significantly decreased with increasing number of traditional cardiovascular risk factors. Analysis of ADMA and L-arginine in DBS is a reliable and reproducible method for quantitation of these markers in field studies.
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EVALUATION OF SYMMETRIC DIMETHYLARGININE AS AN EARLY BIOMARKER OF CHRONIC KIDNEY DISEASE IN CAPTIVE CHEETAHS (ACINONYX JUBATUS). J Zoo Wildl Med 2019; 48:874-877. [PMID: 28920795 DOI: 10.1638/2016-0224.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Symmetric dimethylarginine (SDMA) has been shown to be a valuable biomarker for early detection of chronic kidney disease (CKD) in canine and feline patients. Recognition of early (subclinical) kidney disease would be of value in cheetahs (Acinonyx jubatus) as prevalence of CKD is relatively high in this species in captivity. Fifty-eight banked serum and plasma samples from seven adult cheetahs that died of CKD were analyzed for creatinine, urea, and SDMA. A marked increase in SDMA was noted on five of the tested cheetahs earlier than the rise of serum creatinine and urea (estimated 8-35 mo; mean 21.4 mo; median 22 mo). SDMA appears as an early biomarker to evaluate renal function for the diagnosis of CKD in cheetahs regardless of the cause of this disease.
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20
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Shafi T, Hostetter TH, Meyer TW, Hwang S, Hai X, Melamed ML, Banerjee T, Coresh J, Powe NR. Serum Asymmetric and Symmetric Dimethylarginine and Morbidity and Mortality in Hemodialysis Patients. Am J Kidney Dis 2017; 70:48-58. [PMID: 28089476 DOI: 10.1053/j.ajkd.2016.10.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 10/26/2016] [Indexed: 02/05/2023]
Abstract
BACKGROUND Asymmetric (ADMA) and symmetric dimethylarginine (SDMA) are putative uremic toxins that may exert toxicity by a number of mechanisms, including impaired nitric oxide synthesis and generation of reactive oxygen species. The study goal was to determine the association between these metabolites and cardiovascular outcomes in hemodialysis patients. STUDY DESIGN Post hoc analysis of the Hemodialysis (HEMO) Study. SETTING & PARTICIPANTS 1,276 prevalent hemodialysis patients with available samples 3 to 6 months after randomization. PREDICTOR ADMA and SDMA measured in stored specimens. OUTCOMES Cardiac death, sudden cardiac death, first cardiovascular event, and any-cause death. Association with predictors analyzed using Cox regression adjusted for potential confounders (including demographics, clinical characteristics, comorbid conditions, albumin level, and residual kidney function). RESULTS Mean age of patients was 57±14 (SD) years, 63% were black, and 57% were women. Mean ADMA (0.9±0.2μmol/L) and SDMA levels (4.3±1.4μmol/L) were moderately correlated (r=0.418). Higher dialysis dose or longer session length were not associated with lower predialysis ADMA or SDMA concentrations. In fully adjusted models, each doubling of ADMA level was associated with higher risk (HR per 2-fold higher concentration; 95% CI) of cardiac death (1.83; 1.29-2.58), sudden cardiac death (1.79; 1.19-2.69), first cardiovascular event (1.50; 1.20-1.87), and any-cause death (1.44; 1.13-1.83). Compared to the lowest ADMA quintile (<0.745 μmol/L), the highest ADMA quintile (≥1.07μmol/L) was associated with higher risk (HR; 95% CI) of cardiac death (2.10; 1.44-3.05), sudden cardiac death (2.06; 1.46-2.90), first cardiovascular event (1.75; 1.35-2.27), and any-cause death (1.56; 1.21-2.00). SDMA level was associated with higher risk for cardiac death (HR, 1.40; 95% CI, 1.03-1.92), but this was no longer statistically significant after adjusting for ADMA level (HR, 1.20; 95% CI, 0.86-1.68). LIMITATIONS Single time-point measurement of ADMA and SDMA. CONCLUSIONS ADMA and, to a lesser extent, SDMA levels are associated with cardiovascular outcomes in hemodialysis patients.
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Affiliation(s)
- Tariq Shafi
- Department of Medicine, Johns Hopkins University, Baltimore, MD; Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, MD.
| | - Thomas H Hostetter
- Department of Medicine, Case Western University School of Medicine, Cleveland, OH
| | - Timothy W Meyer
- Department of Medicine, Palo Alto Veterans Affairs Health Care System and Stanford University, Palo Alto, CA
| | | | - Xin Hai
- Department of Medicine, Case Western University School of Medicine, Cleveland, OH
| | - Michal L Melamed
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY; Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY
| | | | - Josef Coresh
- Department of Medicine, Johns Hopkins University, Baltimore, MD; Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, MD; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Neil R Powe
- Department of Medicine, University of California, San Francisco, CA
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Yerramilli M, Farace G, Quinn J, Yerramilli M. Kidney Disease and the Nexus of Chronic Kidney Disease and Acute Kidney Injury: The Role of Novel Biomarkers as Early and Accurate Diagnostics. Vet Clin North Am Small Anim Pract 2016; 46:961-93. [PMID: 27485279 DOI: 10.1016/j.cvsm.2016.06.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chronic kidney disease (CKD) and acute kidney injury (AKI) are interconnected and the presence of one is a risk for the other. CKD is an important predictor of AKI after exposure to nephrotoxic drugs or major surgery, whereas persistent or repetitive injury could result in the progression of CKD. This brings new perspectives to the diagnosis and monitoring of kidney diseases highlighting the need for a panel of kidney-specific biomarkers that reflect functional as well as structural damage and recovery, predict potential risk and provide prognosis. This article discusses the kidney-specific biomarkers, symmetric dimethylarginine (SDMA), clusterin, cystatin B, and inosine.
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Affiliation(s)
- Murthy Yerramilli
- IDEXX Laboratories, Research & Development, 1-IDEXX Drive, Westbrook, ME 04092, USA.
| | - Giosi Farace
- IDEXX Laboratories, Research & Development, 1-IDEXX Drive, Westbrook, ME 04092, USA
| | - John Quinn
- IDEXX Laboratories, Research & Development, 1-IDEXX Drive, Westbrook, ME 04092, USA
| | - Maha Yerramilli
- IDEXX Laboratories, Research & Development, 1-IDEXX Drive, Westbrook, ME 04092, USA
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El-Khoury JM, Bunch DR, Hu B, Payto D, Reineks EZ, Wang S. Comparison of symmetric dimethylarginine with creatinine, cystatin C and their eGFR equations as markers of kidney function. Clin Biochem 2016; 49:1140-1143. [PMID: 27452178 DOI: 10.1016/j.clinbiochem.2016.07.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 07/14/2016] [Accepted: 07/15/2016] [Indexed: 01/02/2023]
Abstract
OBJECTIVES Symmetric dimethylarginine (SDMA) is a catabolic product of arginine-methylated proteins and is an emerging biomarker for kidney function. A limited number of studies in selected populations have shown good correlation between SDMA and a few known markers of glomerular filtration rate (GFR). However, a comprehensive comparison of SDMA with all existing serum endogenous markers in a population with varied kidney function and against measured GFR is lacking. The objective of this study was to compare the correlations of SDMA, creatinine, cystatin C and their eGFR equations against GFR measured by iothalamate clearance in an adult population with varied kidney function. DESIGN & METHODS Left-over serum and plasma specimens were collected from 40 adults with normal and reduced kidney function. GFR was measured using a radioactive iothalamate procedure. Creatinine and cystatin C were measured on Roche Cobas 8000. SDMA was measured by a published liquid chromatography-tandem mass spectrometry method. RESULTS SDMA correlated highly with measured GFR (r=-0.84), which was better than creatinine (r=-0.70) but equivalent to cystatin C (r=-0.86) and the eGFR equations [MDRD and CKD-EPI (separate and combined)]. CONCLUSIONS SDMA is a strong marker of kidney function and further studies are needed to establish an eGFR formula that includes it for widespread clinical use.
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Affiliation(s)
- Joe M El-Khoury
- Department of Laboratory Medicine, Yale University, New Haven, CT 06510, United States
| | - Dustin R Bunch
- Department of Laboratory Medicine, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Bo Hu
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Drew Payto
- Department of Laboratory Medicine, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Edmunds Z Reineks
- Department of Laboratory Medicine, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Sihe Wang
- Department of Laboratory Medicine, Cleveland Clinic, Cleveland, OH 44195, United States.
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Determination of Asymmetric and Symmetric Dimethylarginine in Serum from Patients with Chronic Kidney Disease: UPLC-MS/MS versus ELISA. Toxins (Basel) 2016; 8:toxins8050149. [PMID: 27187471 PMCID: PMC4885064 DOI: 10.3390/toxins8050149] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/19/2016] [Accepted: 05/04/2016] [Indexed: 02/07/2023] Open
Abstract
Asymmetric dimethylarginine (ADMA), an endogenous inhibitor of nitric oxide (NO) synthesis, and its structural isomer symmetric dimethylarginine (SDMA) are uremic toxins accumulating in chronic kidney disease (CKD) patients. The objective of this study was to develop and validate a robust UPLC-MS/MS method for the simultaneous determination of ADMA and SDMA in human serum. Chromatographic separation after butyl ester derivatization was achieved on an Acquity UPLC BEH C18 column, followed by tandem mass spectrometric detection. After validation, the applicability of the method was evaluated by the analysis of serum samples from 10 healthy controls and 77 CKD patients on hemodialysis (CKD5HD). Both ADMA (0.84 ± 0.19 µM vs. 0.52 ± 0.07 µM) and SDMA concentrations (2.06 ± 0.82 µM vs. 0.59 ± 0.13 µM) were significantly (p < 0.001) elevated in CKD5HD patients compared to healthy controls. In general, low degrees of protein binding were found for both ADMA and SDMA. In addition, an established commercially available ELISA kit was utilized on the same samples (n = 87) to compare values obtained both with ELISA and UPLC-MS/MS. Regression analysis between these two methods was significant (p < 0.0001) but moderate for both ADMA (R = 0.78) and SDMA (R = 0.72).
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Affiliation(s)
- Jessica A. Hokamp
- Department of Veterinary Pathobiology; College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; College Station TX USA
| | - Mary B. Nabity
- Department of Veterinary Pathobiology; College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; College Station TX USA
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Stasyuk NY, Gayda GZ, Fayura LR, Boretskyy YR, Gonchar MV, Sibirny AA. Novel arginine deiminase-based method to assay L-arginine in beverages. Food Chem 2016; 201:320-6. [PMID: 26868583 DOI: 10.1016/j.foodchem.2016.01.093] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 01/18/2016] [Accepted: 01/20/2016] [Indexed: 12/01/2022]
Abstract
A highly selective and sensitive enzymatic method for the quantitative determination of L-arginine (Arg) has been developed. The method is based on the use of recombinant bacterial arginine deiminase (ADI) isolated from the cells of a recombinant strain Escherichia coli and o-phthalaldehyde (OPA) as a chemical reagent. Ammonia, the product of the enzymatic digestion of Arg by ADI, reacts with OPA and forms in the presence of sulfite a product, which can be detected by spectrophotometry (S) and fluorometry (F). The linear concentration range for Arg assay in the final reaction mixture varies for ADI-OPA-F variant of the method from 0.35 μM to 24 μM with the detection limit of 0.25 μM. For ADI-OPA-S variant of the assay, the linearity varies from 0.7 μM to 50 μM with the detection limit of 0.55 μM. The new method was tested on real samples of wines and juices. A high correlation (R=0.978) was shown for the results obtained with the proposed and the reference enzymatic method.
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Affiliation(s)
- N Ye Stasyuk
- Institute of Cell Biology, National Academy of Science of Ukraine, Drahomanov Str. 14/16, 79005 Lviv, Ukraine
| | - G Z Gayda
- Institute of Cell Biology, National Academy of Science of Ukraine, Drahomanov Str. 14/16, 79005 Lviv, Ukraine.
| | - L R Fayura
- Institute of Cell Biology, National Academy of Science of Ukraine, Drahomanov Str. 14/16, 79005 Lviv, Ukraine
| | - Y R Boretskyy
- Department of Biochemistry and Hygiene, Lviv State University of Physical Culture, Kosciuszko Street 11, 79000 Lviv, Ukraine; Institute of Cell Biology, National Academy of Science of Ukraine, Drahomanov Str. 14/16, 79005 Lviv, Ukraine
| | - M V Gonchar
- Institute of Cell Biology, National Academy of Science of Ukraine, Drahomanov Str. 14/16, 79005 Lviv, Ukraine; Institute of Applied Biotechnology and Basic Sciences, Rzeszow University, Sokolowska Str. 26, 36-100 Kolbuszowa, Poland
| | - A A Sibirny
- Institute of Cell Biology, National Academy of Science of Ukraine, Drahomanov Str. 14/16, 79005 Lviv, Ukraine; Department of Biotechnology and Microbiology, Rzeszow University, Cwiklinskiej 2, 35-601 Rzeszow, Poland
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Alkaitis MS, Nardone G, Chertow JH, Ackerman HC. Resolution and quantification of arginine, monomethylarginine, asymmetric dimethylarginine, and symmetric dimethylarginine in plasma using HPLC with internal calibration. Biomed Chromatogr 2015; 30:294-300. [PMID: 26130049 PMCID: PMC4755038 DOI: 10.1002/bmc.3548] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 04/05/2015] [Accepted: 06/08/2015] [Indexed: 11/10/2022]
Abstract
N(G) ,N(G) -dimethyl-l-arginine (asymmetric dimethylarginine, ADMA),N(G) -monomethyl-l-arginine (l-NMMA) and N(G) ,N(G') -dimethyl-l-arginine (symmetric dimethylarginine, SDMA) are released during hydrolysis of proteins containing methylated arginine residues. ADMA and l-NMMA inhibit nitric oxide synthase by competing with l-arginine substrate. All three methylarginine derivatives also inhibit arginine transport. To enable investigation of methylarginines in diseases involving impaired nitric oxide synthesis, we developed a high-performance liquid chromatography (HPLC) assay to simultaneously quantify arginine, ADMA, l-NMMA and SDMA. Our assay requires 12 μL of plasma and is ideal for applications where sample availability is limited. We extracted arginine and methylarginines with mixed-mode cation-exchange columns, using synthetic monoethyl-l-arginine as an internal standard. Metabolites were derivatized with ortho-phthaldialdeyhde and 3-mercaptopropionic acid, separated by reverse-phase HPLC and quantified with fluorescence detection. Standard curve linearity was ≥0.9995 for all metabolites. Inter-day coefficient of variation (CV) values were ≤5% for arginine, ADMA and SDMA in human plasma and for arginine and ADMA in mouse plasma. The CV value for l-NMMA was higher in human (10.4%) and mouse (15.8%) plasma because concentrations were substantially lower than ADMA and SDMA. This assay provides unique advantages of small sample volume requirements, excellent separation of target metabolites from contaminants and validation for both human and mouse plasma samples.
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Affiliation(s)
- Matthew S Alkaitis
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Rockville, Maryland, USA.,Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford, UK
| | - Glenn Nardone
- Research Technologies Branch, National Institute of Allergy and Infectious Diseases, Rockville, Maryland, USA
| | - Jessica H Chertow
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Rockville, Maryland, USA
| | - Hans C Ackerman
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Rockville, Maryland, USA
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Jorgensen A, Knorr U, Soendergaard MG, Lykkesfeldt J, Fink-Jensen A, Poulsen HE, Jorgensen MB, Olsen NV, Staalsø JM. Asymmetric dimethylarginine in somatically healthy schizophrenia patients treated with atypical antipsychotics: a case-control study. BMC Psychiatry 2015; 15:67. [PMID: 25880260 PMCID: PMC4394403 DOI: 10.1186/s12888-015-0455-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 03/23/2015] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Schizophrenia is associated with increased cardiovascular morbidity and mortality. Asymmetric dimethylarginine (ADMA), an endogenous inhibitor of the nitric oxide synthase, and the L-arginine:ADMA ratio are markers of endothelial dysfunction that predict mortality and adverse outcome in a range of cardiovascular disorders. Increased ADMA levels may also lead to increased oxidative stress. We hypothesized that ADMA and the L-arginine:ADMA ratio are increased in somatically healthy schizophrenia patients treated with atypical antipsychotics (AAP), and that the ADMA and the L-arginine: ADMA ratio are positively correlated to measures of oxidative stress. METHODS We included 40 schizophrenia patients treated with AAP, but without somatic disease or drug abuse, and 40 healthy controls. Plasma concentrations of ADMA and L-arginine were determined by high-performance liquid chromatography. Data were related to markers of systemic oxidative stress on DNA, RNA and lipids, as well as measures of medication load, duration of disease and current symptomatology. RESULTS Plasma ADMA and the L-arginine:ADMA ratio did not differ between schizophrenia patients and controls. Furthermore, ADMA and the L-arginine:ADMA ratio showed no correlations with oxidative stress markers, medication load, or Positive and Negative Syndrome Scale scores. CONCLUSIONS Schizophrenia and treatment with AAP was not associated with increased levels of plasma ADMA or the L-arginine:ADMA ratio. Furthermore, plasma levels of ADMA were not associated with levels of systemic oxidative stress in vivo.
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Affiliation(s)
- Anders Jorgensen
- Psychiatric Centre Copenhagen, University Hospital of Copenhagen, Copenhagen, Denmark. .,Department of Neuroscience and Pharmacology, Laboratory of Neuropsychiatry, University of Copenhagen, Copenhagen, Denmark. .,Psychiatric Centre Copenhagen, University Hospital of Copenhagen, Rigshospitalet, Blegdamsvej 9, DK-2100, Copenhagen, Denmark.
| | - Ulla Knorr
- Psychiatric Centre Copenhagen, University Hospital of Copenhagen, Copenhagen, Denmark.
| | | | - Jens Lykkesfeldt
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Anders Fink-Jensen
- Psychiatric Centre Copenhagen, University Hospital of Copenhagen, Copenhagen, Denmark. .,Department of Neuroscience and Pharmacology, Laboratory of Neuropsychiatry, University of Copenhagen, Copenhagen, Denmark. .,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Henrik Enghusen Poulsen
- Laboratory of Clinical Pharmacology Q7642, Rigshospitalet, Copenhagen, Denmark. .,Department of Clinical Pharmacology, Bispebjerg Hospital, Copenhagen, Denmark. .,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Martin Balslev Jorgensen
- Psychiatric Centre Copenhagen, University Hospital of Copenhagen, Copenhagen, Denmark. .,Department of Neuroscience and Pharmacology, Laboratory of Neuropsychiatry, University of Copenhagen, Copenhagen, Denmark. .,Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Niels Vidiendal Olsen
- Department of Neuroscience and Pharmacology, Laboratory of Neuropsychiatry, University of Copenhagen, Copenhagen, Denmark. .,Department of Neuroanaesthesia, The Neuroscience Centre, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark.
| | - Jonatan Myrup Staalsø
- Department of Neuroscience and Pharmacology, Laboratory of Neuropsychiatry, University of Copenhagen, Copenhagen, Denmark.
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Andrade F, Llarena M, Lage S, Aldámiz-Echevarría L. Quantification of Arginine and its Methylated Derivatives in Healthy Children by Liquid Chromatography-Tandem Mass Spectrometry. J Chromatogr Sci 2014; 53:787-92. [DOI: 10.1093/chromsci/bmu126] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Indexed: 11/12/2022]
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Nonaka S, Sekine M, Tsunoda M, Ozeki Y, Fujii K, Akiyama K, Shimoda K, Furuchi T, Katane M, Saitoh Y, Homma H. Simultaneous determination of N
G
-monomethyl-l
-arginine, N
G
,N
G
-dimethyl-l
-arginine, N
G
,N
G′
-dimethyl-l
-arginine, and l
-arginine using monolithic silica disk-packed spin columns and a monolithic silica column. J Sep Sci 2014; 37:2087-94. [DOI: 10.1002/jssc.201400240] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/26/2014] [Accepted: 05/26/2014] [Indexed: 12/11/2022]
Affiliation(s)
- Satoko Nonaka
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
- Pfizer Worldwide Research & Development; Tokyo Laboratories; Tokyo Japan
| | - Masae Sekine
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
| | - Makoto Tsunoda
- Graduate School of Pharmaceutical Sciences; University of Tokyo; Tokyo Japan
| | - Yuji Ozeki
- Department of Psychiatry; Dokkyo Medical University School of Medicine; Tochigi Japan
| | - Kumiko Fujii
- Department of Psychiatry; Dokkyo Medical University School of Medicine; Tochigi Japan
| | - Kazufumi Akiyama
- Department of Biological Psychiatry and Neuroscience; Dokkyo Medical University School of Medicine; Tochigi Japan
| | - Kazutaka Shimoda
- Department of Psychiatry; Dokkyo Medical University School of Medicine; Tochigi Japan
| | - Takemitsu Furuchi
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
| | - Masumi Katane
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
| | - Yasuaki Saitoh
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
| | - Hiroshi Homma
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
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Martens-Lobenhoffer J, Bode-Böger SM. Mass spectrometric quantification of L-arginine and its pathway related substances in biofluids: the road to maturity. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 964:89-102. [PMID: 24210895 DOI: 10.1016/j.jchromb.2013.10.030] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 10/17/2013] [Accepted: 10/19/2013] [Indexed: 11/18/2022]
Abstract
The amino acid L-arginine together with its metabolites and related substances is in the center of many biologically important pathways, especially the urea cycle and the nitric oxide (NO) synthesis. Therefore, the concentrations of these substances in various biological fluids are of great interest as predictive markers for health and disease. Yet, they provide major analytical difficulties as they are very polar in nature and therefore not easily to be separated on standard reversed phase HPLC stationary phases. Furthermore, as endogenous substances, no analyte-free matrix is available, a fact that results in complicated calibration procedures. This review evaluates the analytical literature for the determination of L-arginine, symmetric dimethylarginine, asymmetric dimethylarginine, monomethylarginine, L-citrulline, L-ornithine, L-homoarginine, agmatine and dimethylguanidinovaleric acid in biological fluids. Papers are discussed, which were published since 2007 and describe methods applying capillary electrophoresis (CE), gas chromatography (GC), reversed phase HPLC or polar phase HPLC, coupled to mass spectrometric quantification. Nowadays, many carefully developed and validated methods for L-arginine and its related substances are available to the scientific community. The use of stable isotope labeled internal standards enables high precision and accuracy in mass spectrometry-based quantitative analysis.
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Affiliation(s)
| | - Stefanie M Bode-Böger
- Institute of Clinical Pharmacology, Otto-von-Guericke University, Magdeburg, Germany
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31
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Kleparnik M, Tomandlova M, Glatz Z, Tomandl J. Determination of asymmetric and symmetric dimethylarginines in human plasma by HPLC with electrochemical detection. J Sep Sci 2013; 36:3696-701. [DOI: 10.1002/jssc.201300813] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/06/2013] [Accepted: 09/16/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Martin Kleparnik
- Department of Biochemistry; Faculty of Medicine; Masaryk University; Kamenice Brno Czech Republic
| | - Marie Tomandlova
- Department of Biochemistry; Faculty of Medicine; Masaryk University; Kamenice Brno Czech Republic
| | - Zdenek Glatz
- Department of Biochemistry; Faculty of Science and CEITEC - Central European Institute of Technology; Masaryk University; Kamenice Brno Czech Republic
| | - Josef Tomandl
- Department of Biochemistry; Faculty of Medicine; Masaryk University; Kamenice Brno Czech Republic
- Department of Biochemistry; Faculty of Science and CEITEC - Central European Institute of Technology; Masaryk University; Kamenice Brno Czech Republic
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Cieslak W, Pap K, Bunch DR, Reineks E, Jackson R, Steinle R, Wang S. Highly sensitive measurement of whole blood chromium by inductively coupled plasma mass spectrometry. Clin Biochem 2013; 46:266-70. [DOI: 10.1016/j.clinbiochem.2012.10.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 10/18/2012] [Accepted: 10/24/2012] [Indexed: 10/27/2022]
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Midttun Ø, Kvalheim G, Ueland PM. High-throughput, low-volume, multianalyte quantification of plasma metabolites related to one-carbon metabolism using HPLC-MS/MS. Anal Bioanal Chem 2012; 405:2009-17. [DOI: 10.1007/s00216-012-6602-6] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 11/20/2012] [Accepted: 11/23/2012] [Indexed: 01/25/2023]
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Di Gangi IM, Pirillo P, Carraro S, Gucciardi A, Naturale M, Baraldi E, Giordano G. Online trapping and enrichment ultra performance liquid chromatography-tandem mass spectrometry method for sensitive measurement of "arginine-asymmetric dimethylarginine cycle" biomarkers in human exhaled breath condensate. Anal Chim Acta 2012; 754:67-74. [PMID: 23140956 DOI: 10.1016/j.aca.2012.09.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 08/30/2012] [Accepted: 09/21/2012] [Indexed: 11/25/2022]
Abstract
BACKGROUND Exhaled breath condensate (EBC) is a biofluid collected non invasively that, enabling the measurement of several biomarkers, has proven useful in the study of airway inflammatory diseases, including asthma, COPD and cystic fibrosis. To the best of our knowledge, there is no previous report of any analytical method to detect ADMA in EBC. OBJECTIVES Aim of this work was to develop an online sample trapping and enrichment system, coupled with an UPLC-MS/MS method, for simultaneous quantification of seven metabolites related to "Arginine-ADMA cycle", using the isotopic dilution. METHODS Butylated EBC samples were trapped in an online cartridge, washed before and after each injection with cleanup solution to remove matrix components and switched inline into the high pressure analytical column. Multiple reaction monitoring in positive mode was used for analyte quantification by tandem mass spectrometry. RESULTS Validation studies were performed in EBC to examine accuracy, precision and robustness of the method. For each compound, the calibration curves showed a coefficient of correlation (r(2)) greater than 0.992. Accuracy (%Bias) was <3% except for NMMA and H-Arg (<20%), intra- and inter-assay precision (expressed as CV%) were within ±20% and recovery ranged from 97.1 to 102.8% for all analytes. Inter-day variability analysis on 20 EBC of adult subjects did not demonstrate any significant variation of quantitative data for each metabolite. ADMA and SDMA mean concentrations (μmolL(-1)), measured in EBC samples of asthmatic adolescents are significantly increased (p<0.0001) than in normal controls (0.0040±0.0021 vs. 0.0012±0.0005 and 0.0020±0.0015 vs. 0.0002±0.0001, respectively), as well the ADMA/Tyr (0.34±0.09 vs. 0.12±0.02, p<0.0001) and the SDMA/Tyr ratio (0.10±0.04 vs. 0.015±0.004, p<0.0001). CONCLUSIONS The proposed method features simple specimen preparation, maintenance of an excellent peak shape of all metabolites and reduced matrix effects as well mass spectrometer noise. Moreover, the possibility to perform different cycles of enrichment, using large injection volumes, compensated for the low concentration of analytes contained in EBC, leading to a good analytical sensitivity. Preliminary data obtained from asthmatic and healthy adolescents, demonstrated that the analytical method applied to EBC seems suitable not only for research purposes, but also for clinical routinely analysis.
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Affiliation(s)
- Iole Maria Di Gangi
- Chromatography and Mass Spectrometry Laboratory, Department of Women's and Children's Health, University of Padova, Italy.
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Aldámiz-Echevarría L, Andrade F. Asymmetric dimethylarginine, endothelial dysfunction and renal disease. Int J Mol Sci 2012; 13:11288-11311. [PMID: 23109853 PMCID: PMC3472745 DOI: 10.3390/ijms130911288] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 08/28/2012] [Accepted: 09/03/2012] [Indexed: 11/16/2022] Open
Abstract
l-Arginine (Arg) is oxidized to l-citrulline and nitric oxide (NO) by the action of endothelial nitric oxide synthase (NOS). In contrast, protein-incorporated Arg residues can be methylated with subsequent proteolysis giving rise to methylarginine compounds, such as asymmetric dimethylarginine (ADMA) that competes with Arg for binding to NOS. Most ADMA is degraded by dimethylarginine dimethyaminohydrolase (DDAH), distributed widely throughout the body and regulates ADMA levels and, therefore, NO synthesis. In recent years, several studies have suggested that increased ADMA levels are a marker of atherosclerotic change, and can be used to assess cardiovascular risk, consistent with ADMA being predominantly absorbed by endothelial cells. NO is an important messenger molecule involved in numerous biological processes, and its activity is essential to understand both pathogenic and therapeutic mechanisms in kidney disease and renal transplantation. NO production is reduced in renal patients because of their elevated ADMA levels with associated reduced DDAH activity. These factors contribute to endothelial dysfunction, oxidative stress and the progression of renal damage, but there are treatments that may effectively reduce ADMA levels in patients with kidney disease. Available data on ADMA levels in controls and renal patients, both in adults and children, also are summarized in this review.
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Martens-Lobenhoffer J, Bode-Böger SM. Quantification of L-arginine, asymmetric dimethylarginine and symmetric dimethylarginine in human plasma: a step improvement in precision by stable isotope dilution mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 904:140-3. [PMID: 22884474 DOI: 10.1016/j.jchromb.2012.07.021] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 07/19/2012] [Accepted: 07/20/2012] [Indexed: 10/28/2022]
Abstract
The amino acid L-arginine and its metabolites ADMA and SDMA are important markers for a range of diseases in humans. Increased levels of ADMA and SDMA in plasma point to endothelial dysfunction, hypertension, renal impairment and other pathological states. We present here a method to quantify L-arginine, ADMA and SDMA in human plasma, which is suitable to support clinical research in this field. Sample preparation consisted only of protein precipitation and the analytes were separated using a silica based HILIC column. The analytes were detected by ESI MS/MS, providing high selectivity and sensitivity. The calibration functions were linear in the ranges of 7.5-150 μmol/l for l-arginine, 0.15-3 μmol/l for ADMA and 0.2-4 μmol/l for SDMA. These ranges cover the concentrations encountered in healthy and pathological human plasma. The method employs (13)C(6)-arginine, D(7)-ADMA and, for the first time in LC-MS/MS, D(6)-SDMA as internal standards for L-arginine, ADMA and SDMA. Therefore, matrix independency and a high intra-day precision of 0.82% for L-arginine, 2.12% for ADMA and 2.83% for SDMA, were achieved at basal plasma concentrations. The respective inter-day precision values were 4.01% for l-arginine, 3.77% for ADMA and 3.86% for SDMA.
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