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Ma Q, Man X, Xu CY, Huo J, Qi C, Shi Q, Nan J, Min JZ. Simultaneous determination of three endogenous chiral thiol compounds in serum from humans at normal and stress states using ultrahigh-performance liquid chromatography coupled to quadrupole-Orbitrap high resolution mass spectrometry. J Chromatogr A 2021; 1642:462028. [PMID: 33721814 DOI: 10.1016/j.chroma.2021.462028] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 02/15/2021] [Accepted: 02/25/2021] [Indexed: 12/16/2022]
Abstract
Measurement of chiral thiol compounds such as glutathione (GSH), cysteine (Cys), and homocysteine (Hcy) in human serum plays an important role in the early diagnosis and warning of cardiovascular disease, neurodegenerative disease, and cancer. We developed a novel chiral mass spectrometry derivatization reagent, (R)-(5-(3-isothiocyanatopyrrolidin-1-yl)-5-oxopentyl) triphenylphosphonium (NCS-OTPP), with triphenylphosphine (TPP) as a basic structure carrying a permanent positive charge for the diastereomeric separation of chiral thiol compounds by ultrahigh-performance liquid chromatography coupled to quadrupole-Orbitrap high resolution mass spectrometry (UHPLC-Q-Orbitrap HRMS). A novel method was developed for simultaneous determination of three kinds of chiral thiol compounds based on the NCS-OTPP derivatization method. Three kinds of chiral thiol compounds on a YMC Triart C18 (2.0 × 150 mm, 1.9 μm) column with Rs were 1.56-1.68. The protonated precursor to product ion transitions monitored for GSH was m/z 780.16→747.24/473.18, Cys was m/z 594.20→561.18/473.18, and Hcy was m/z 608.21→575.19/473.18. An excellent linearity for all the analytes with correlation coefficients ≥ 0.9995 and suitable precision with inter-day and intra-day coefficients of variation RSDs was 0.83-4.06% and 0.95-3.11%. Satisfactory accuracy with recoveries between 83.73 and 103.35% was observed. The limit of detection (S/N = 3) was 2.4-7.2 fmol. Furthermore, the method was successfully applied to the simultaneous determination of three kinds of free and total thiol compounds in serum from 10 healthy volunteers at normal and stress states.
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Affiliation(s)
- Qingkun Ma
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, and Department of Pharmacy, Department of Orthopaedics, Yanbian University Hospital, Yanji 133002, Jilin Province, China
| | - Xiaoxi Man
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, and Department of Pharmacy, Department of Orthopaedics, Yanbian University Hospital, Yanji 133002, Jilin Province, China
| | - Chun-Yan Xu
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, and Department of Pharmacy, Department of Orthopaedics, Yanbian University Hospital, Yanji 133002, Jilin Province, China
| | - Jian Huo
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, and Department of Pharmacy, Department of Orthopaedics, Yanbian University Hospital, Yanji 133002, Jilin Province, China
| | - Chao Qi
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, and Department of Pharmacy, Department of Orthopaedics, Yanbian University Hospital, Yanji 133002, Jilin Province, China
| | - Qing Shi
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, and Department of Pharmacy, Department of Orthopaedics, Yanbian University Hospital, Yanji 133002, Jilin Province, China
| | - Jun Nan
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, and Department of Pharmacy, Department of Orthopaedics, Yanbian University Hospital, Yanji 133002, Jilin Province, China.
| | - Jun Zhe Min
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, Pharmaceutical Analysis, College of Pharmacy Yanbian University, and Department of Pharmacy, Department of Orthopaedics, Yanbian University Hospital, Yanji 133002, Jilin Province, China.
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Swanepoel AC, Bester J, Emmerson O, Soma P, Beukes D, van Reenen M, Loots DT, du Preez I. Serum Metabolome Changes in Relation to Prothrombotic State Induced by Combined Oral Contraceptives with Drospirenone and Ethinylestradiol. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2020; 24:404-414. [PMID: 32471328 DOI: 10.1089/omi.2020.0009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The association between hypercoagulability and use of drospirenone (DRSP) and ethinylestradiol (EE) containing combined oral contraceptives (COCs) is an important clinical concern. We have previously reported that the two formulations of DRSP combined with EE (namely, DRSP/20EE and DRSP/30EE) bring about a prothrombotic state in hemostatic traits of female users. We report here the serum metabolomic changes in the same study cohort in relation to the attendant prothrombotic state induced by COC use, thus offering new insights on the underlying biochemical mechanisms contributing to the altered coagulatory profile with COC use. A total of 78 healthy women participated in this study and were grouped as follows: control group not using oral contraceptives (n = 25), DRSP/20EE group (n = 27), and DRSP/30EE group (n = 26). Untargeted metabolomics revealed changes in amino acid concentrations, particularly a decrease in glycine and an increase in both cysteine and lanthionine in the serum, accompanied by variations in oxidative stress markers in the COC users compared with the controls. Of importance, this study is the first to link specific amino acid variations, serum metabolites, and the oxidative metabolic profile with DRSP/EE use. These molecular changes could be linked to specific biophysical coagulatory alterations observed in the same individuals. These new findings lend evidence on the metabolomic substrates of the prothrombotic state associated with COC use in women and informs future personalized/precision medicine research. Moreover, we underscore the importance of an interdisciplinary approach to evaluate venous thrombotic risk associated with COC use.
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Affiliation(s)
- Albe Carina Swanepoel
- Department of Physiology and Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Janette Bester
- Department of Physiology and Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Odette Emmerson
- Department of Physiology and Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Prashilla Soma
- Department of Anatomy, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Derylize Beukes
- Human Metabolomics, North-West University, Potchefstroom, South Africa
| | - Mari van Reenen
- Human Metabolomics, North-West University, Potchefstroom, South Africa
| | - Du Toit Loots
- Human Metabolomics, North-West University, Potchefstroom, South Africa
| | - Ilse du Preez
- Human Metabolomics, North-West University, Potchefstroom, South Africa
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Higher Levels of Low Molecular Weight Sulfur Compounds and Homocysteine Thiolactone in the Urine of Autistic Children. Molecules 2020; 25:molecules25040973. [PMID: 32098164 PMCID: PMC7070266 DOI: 10.3390/molecules25040973] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/17/2020] [Accepted: 02/19/2020] [Indexed: 12/23/2022] Open
Abstract
In this study, the levels of concentration of homocysteine thiolactone (HTL), cysteine (Cys), and cysteinylglycine (CysGly) in the urine of autistic and non-autistic children were investigated and compared. HTL has never been analyzed in autistic children. The levels of low molecular weight sulfur compounds in the urine of both groups were determined by validated methods based on high-performance liquid chromatography with spectrofluorometric and diode-array detectors. The statistical data show a significant difference between the examined groups. Children with autism were characterized by a significantly higher level of HTL (p = 5.86 × 10−8), Cys (p = 1.49 × 10−10) and CysGly (p = 1.06 × 10−8) in urine compared with the control group. A difference in the p-value of <0.05 is statistically significant. Higher levels of HTL, Cys, and CysGly in the urine of 41 children with autism, aged 3 to 17, were observed. The obtained results may indicate disturbances in the metabolism of methionine, Cys, and glutathione in some autistic patients. These preliminary results suggest that further research with more rigorous designs and a large number of subjects is needed.
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Hishida M, Imaizumi T, Nishiyama T, Okazaki M, Kaihan AB, Kato S, Kubo Y, Ando M, Kaneda H, Maruyama S. Survival Benefit of Maintained or Increased Body Mass Index in Patients Undergoing Extended-Hours Hemodialysis Without Dietary Restrictions. J Ren Nutr 2019; 30:154-162. [PMID: 31401040 DOI: 10.1053/j.jrn.2019.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 05/16/2019] [Accepted: 06/02/2019] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE Low body mass index (BMI) is a potential risk factor for mortality in patients on maintenance hemodialysis. This suggests the usefulness of BMI as a prognostic factor and implies the importance of nutritional status, inflammation, and oxidative stress, all of which affect BMI. We aimed to evaluate BMI changes over time and the mortality risk in patients undergoing a novel combination therapy consisting of an extended-hours hemodialysis protocol without dietary restrictions, which enabled sufficient nutrition. DESIGN AND METHODS This is a retrospective cohort study. Patients were divided into 2 groups based on BMI change (ΔBMI < 0, ΔBMI ≥ 0) between the 3rd and 12th month after transfer to the clinic. We studied the associations of BMI changes with all-cause mortality. Further subgroup analyses were performed using Cox models. We finally studied 187 patients who were receiving the combined therapy. The main outcome measure was all-cause mortality of the study group. RESULTS The median (interquartile range) follow-up time was 4.9 (3.0-8.6) years. Overall, 138 patients were in the ΔBMI ≥ 0 group. As per unadjusted and adjusted Cox models, maintained or increased BMI during this period was associated with hazard ratios of 0.45 (confidence interval 0.23-0.87, P < .05) and 0.35 (confidence interval 0.17-0.75, P < .01) for all-cause mortality, respectively. In the same group, maintained or increased BMI was found to be significantly associated with decreased mortality in female, older, and nondiabetic patients. The data indicated that diabetic status could have a modifying effect on the association between variation in BMI and mortality (P = .006). CONCLUSIONS Extended-hours hemodialysis without dietary restrictions led to a beneficial effect of maintenance or increase in BMI, especially in females, patients aged ≥65 years, and those without diabetic nephropathy, which could lead to prolonged survival.
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Affiliation(s)
- Manabu Hishida
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Takahiro Imaizumi
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Toshiro Nishiyama
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Masaki Okazaki
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Ahmad Baseer Kaihan
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Sawako Kato
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Yoko Kubo
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Masahiko Ando
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Hiroshi Kaneda
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan
| | - Shoichi Maruyama
- Department of Nephrology, Nagoya University Graduate School of Medicine, Kamome Clinic, Ibaraki, Japan.
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Mohammed CJ, Xie Y, Brewster PS, Ghosh S, Dube P, Sarsour T, Kleinhenz AL, Crawford EL, Malhotra D, James RW, Kalra PA, Haller ST, Kennedy DJ. Circulating Lactonase Activity but Not Protein Level of PON-1 Predicts Adverse Outcomes in Subjects with Chronic Kidney Disease. J Clin Med 2019; 8:jcm8071034. [PMID: 31311140 PMCID: PMC6678354 DOI: 10.3390/jcm8071034] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/11/2019] [Accepted: 07/11/2019] [Indexed: 01/10/2023] Open
Abstract
The burden of cardiovascular disease and death in chronic kidney disease (CKD) outpaces that of the other diseases and is not adequately described by traditional risk factors alone. Diminished activity of paraoxonase (PON)-1 is associated with increased oxidant stress, a common feature underlying the pathogenesis of CKD. We aimed to assess the prognostic value of circulating PON-1 protein and PON lactonase activity on adverse clinical outcomes across various stages and etiologies of CKD. Circulating PON-1 protein levels and PON lactonase activity were measured simultaneously in patients with CKD as well as a cohort of apparently healthy non-CKD subjects. Both circulating PON-1 protein levels and PON lactonase activity were significantly lower in CKD patients compared to the non-CKD subjects. Similarly, across all stages of CKD, circulating PON-1 protein and PON lactonase activity were significantly lower in patients with CKD compared to the non-CKD controls. Circulating PON lactonase activity, but not protein levels, predicted future adverse clinical outcomes, even after adjustment for traditional risk factors. The combination of lower circulating protein levels and higher activity within the CKD subjects were associated with the best survival outcomes. These findings demonstrate that diminished circulating PON lactonase activity, but not protein levels, predicts higher risk of future adverse clinical outcomes in patients with CKD.
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Affiliation(s)
- Chrysan J Mohammed
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Yanmei Xie
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Pamela S Brewster
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Subhanwita Ghosh
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Prabhatchandra Dube
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Tiana Sarsour
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Andrew L Kleinhenz
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Erin L Crawford
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Deepak Malhotra
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - Richard W James
- Department of Internal Medicine, Geneva University Hospital, 1205 Geneva, Switzerland
| | - Philip A Kalra
- Department of Renal Medicine, Salford Royal Hospital, Stott Lane, Salford, Greater Manchester M6 8HD, UK
| | - Steven T Haller
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
| | - David J Kennedy
- Department of Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA.
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Bocedi A, Cattani G, Stella L, Massoud R, Ricci G. Thiol disulfide exchange reactions in human serum albumin: the apparent paradox of the redox transitions of Cys34. FEBS J 2018; 285:3225-3237. [DOI: 10.1111/febs.14609] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/05/2018] [Accepted: 07/18/2018] [Indexed: 01/07/2023]
Affiliation(s)
- Alessio Bocedi
- Department of Chemical Sciences and Technologies University of Rome Tor Vergata Italy
| | - Giada Cattani
- Department of Chemical Sciences and Technologies University of Rome Tor Vergata Italy
| | - Lorenzo Stella
- Department of Chemical Sciences and Technologies University of Rome Tor Vergata Italy
| | - Renato Massoud
- Department of Experimental Medicine and Surgery University of Rome Tor Vergata Italy
| | - Giorgio Ricci
- Department of Chemical Sciences and Technologies University of Rome Tor Vergata Italy
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Li L, Hasegawa H, Inaba N, Yoshioka W, Chang D, Liu J, Ichida K. Diet-induced hyperhomocysteinemia impairs vasodilation in 5/6-nephrectomized rats. Amino Acids 2018; 50:1485-1494. [PMID: 30062489 DOI: 10.1007/s00726-018-2626-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 07/19/2018] [Indexed: 12/28/2022]
Abstract
Plasma homocysteine is elevated in patients with impaired renal function, and markedly so at end-stage renal disease. As chronic kidney disease and hyperhomocysteinemia are also independent risk factors for cardiovascular disease, the latter is hypothesized to accelerate vascular abnormalities following renal failure. This study aimed to investigate the combined effect of impaired renal function and hyperhomocysteinemia on vascular function. We show that in 5/6-nephrectomized rats, a model of chronic kidney disease, a methionine-rich diet for 8 weeks induces moderate hyperhomocysteinemia, exacerbates hypertension, and attenuates the vascular response to acetylcholine, sodium nitroprusside, 8-bromo-cGMP, and isoprenaline. However, plasma nitrate/nitrite and total NOS activity in the thoracic aorta were not affected. Collectively, the data imply that hyperhomocysteinemia and end-stage renal disease synergistically impair endothelium-dependent and endothelium-independent vasodilatation by blocking the cGMP/protein kinase G and/or cAMP/protein kinase A pathways. 5/6-Nephrectomized rat with hyperhomocysteinemia induced by a methionine-rich diet would be a useful model for elucidating the pathogenesis of vascular impairment in patients with end-stage renal disease.
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Affiliation(s)
- Lei Li
- Institute of Basic Medical Sciences, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Hiroshi Hasegawa
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Niro Inaba
- Center for Fundamental Laboratory Education, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Wataru Yoshioka
- Department of Public Health and Environmental Medicine, School of Medicine, The Jikei University, Tokyo, Japan
| | - Dennis Chang
- National Institute of Complementary Medicine, School of Science and Health, Western Sydney University, Penrith, NSW, 2751, Australia
| | - JianXun Liu
- Institute of Basic Medical Sciences, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Kimiyoshi Ichida
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan.
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Benito S, Sánchez-Ortega A, Unceta N, Jansen JJ, Postma G, Andrade F, Aldámiz-Echevarria L, Buydens LMC, Goicolea MA, Barrio RJ. Plasma biomarker discovery for early chronic kidney disease diagnosis based on chemometric approaches using LC-QTOF targeted metabolomics data. J Pharm Biomed Anal 2017; 149:46-56. [PMID: 29100030 DOI: 10.1016/j.jpba.2017.10.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 10/10/2017] [Accepted: 10/28/2017] [Indexed: 11/16/2022]
Abstract
Chronic kidney disease (CKD) is a progressive pathological condition in which renal function deteriorates in time. The first diagnosis of CKD is often carried out in general care attention by general practitioners by means of serum creatinine (CNN) levels. However, it lacks sensitivity and thus, there is a need for new robust biomarkers to allow the detection of kidney damage particularly in early stages. Multivariate data analysis of plasma concentrations obtained from LC-QTOF targeted metabolomics method may reveal metabolites suspicious of being either up-regulated or down-regulated from urea cycle, arginine methylation and arginine-creatine metabolic pathways in CKD pediatrics and controls. The results show that citrulline (CIT), symmetric dimethylarginine (SDMA) and S-adenosylmethionine (SAM) are interesting biomarkers to support diagnosis by CNN: early CKD samples and controls were classified with an increase in classification accuracy of 18% when using these 4 metabolites compared to CNN alone. These metabolites together allow classification of the samples into a definite stage of the disease with an accuracy of 74%, being the 90% of the misclassifications one level above or below the CKD stage set by the nephrologists. Finally, sex-related, age-related and treatment-related effects were studied, to evaluate whether changes in metabolite concentration could be attributable to these factors, and to correct them in case a new equation is developed with these potential biomarkers for the diagnosis and monitoring of pediatric CKD.
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Affiliation(s)
- S Benito
- Department of Analytical Chemistry, University of the Basque Country (UPV/EHU), Faculty of Pharmacy, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - A Sánchez-Ortega
- Central Service of Analysis (SGiker), University of the Basque Country (UPV/EHU), Laskaray Ikergunea, Miguel de Unamuno 3, 01006 Vitoria-Gasteiz, Spain
| | - N Unceta
- Department of Analytical Chemistry, University of the Basque Country (UPV/EHU), Faculty of Pharmacy, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - J J Jansen
- Radboud University, Institute for Molecules and Materials (Analytical Chemistry-Chemometrics), P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
| | - G Postma
- Radboud University, Institute for Molecules and Materials (Analytical Chemistry-Chemometrics), P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
| | - F Andrade
- Group of Metabolism, BioCruces Health Research Institute, CIBER de Enfermedades Raras (CIBERER), Plaza de Cruces 12, 48903 Barakaldo, Spain
| | - L Aldámiz-Echevarria
- Group of Metabolism, BioCruces Health Research Institute, CIBER de Enfermedades Raras (CIBERER), Plaza de Cruces 12, 48903 Barakaldo, Spain
| | - L M C Buydens
- Radboud University, Institute for Molecules and Materials (Analytical Chemistry-Chemometrics), P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
| | - M A Goicolea
- Department of Analytical Chemistry, University of the Basque Country (UPV/EHU), Faculty of Pharmacy, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - R J Barrio
- Department of Analytical Chemistry, University of the Basque Country (UPV/EHU), Faculty of Pharmacy, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
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Florens N, Yi D, Juillard L, Soulage CO. Using binding competitors of albumin to promote the removal of protein-bound uremic toxins in hemodialysis: Hope or pipe dream? Biochimie 2017; 144:1-8. [PMID: 28987629 DOI: 10.1016/j.biochi.2017.09.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 09/28/2017] [Indexed: 02/08/2023]
Abstract
Chronic kidney disease is associated with the accumulation of a large range of uremic retention solutes as referred to as uremic toxins. Some of these compounds belong to the group of Protein Bound Uremic Toxins (PBUT) due to their tight interactions with plasma proteins and especially serum albumin. These PBUT therefore exist in the bloodstream into two forms: a major bound (and non-diffusible) fraction and a minor free fraction. As a result, these compounds are poorly removed by most of the renal replacement therapies (such as hemodialysis) and their concentration can hardly be decreased in end-stage renal disease patients. An increase of the free fraction of PBUT could be achieved using chemical displacers that could compete with PBUT for binding to serum albumin. This review summarizes and discusses the interest of chemicals displacers as a valuable option to enhance PBUT removal in CKD patients.
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Affiliation(s)
- Nans Florens
- Univ. Lyon, CarMeN, INSERM U1060, INSA de Lyon, INRA U1397, F-69621, Villeurbanne, France; Hospices Civils de Lyon, Department of Nephrology, Hôpital E. Herriot, Lyon, F-69003, France.
| | - Dan Yi
- Univ. Lyon, CarMeN, INSERM U1060, INSA de Lyon, INRA U1397, F-69621, Villeurbanne, France
| | - Laurent Juillard
- Univ. Lyon, CarMeN, INSERM U1060, INSA de Lyon, INRA U1397, F-69621, Villeurbanne, France; Hospices Civils de Lyon, Department of Nephrology, Hôpital E. Herriot, Lyon, F-69003, France
| | - Christophe O Soulage
- Univ. Lyon, CarMeN, INSERM U1060, INSA de Lyon, INRA U1397, F-69621, Villeurbanne, France
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10
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Sikdar J, Seal P, Roy A, Haldar R. Cigarette smokers develop altered erythrocyte membrane composition: an investigation unmasking the role of membrane bound integral protein GLUT 1. Free Radic Res 2017; 51:375-388. [DOI: 10.1080/10715762.2017.1321744] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Jyotirmoy Sikdar
- Department of Physiology, University Colleges of Science and Technology, University of Calcutta, Kolkata, India
| | - Paromita Seal
- Department of Physiology, University Colleges of Science and Technology, University of Calcutta, Kolkata, India
| | - Amartya Roy
- Department of Physiology, University Colleges of Science and Technology, University of Calcutta, Kolkata, India
| | - Rajen Haldar
- Department of Physiology, University Colleges of Science and Technology, University of Calcutta, Kolkata, India
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11
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A versatile method for analysis of saliva, plasma and urine for total thiols using HPLC with UV detection. Talanta 2016; 155:70-7. [PMID: 27216658 DOI: 10.1016/j.talanta.2016.04.031] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 04/12/2016] [Accepted: 04/14/2016] [Indexed: 11/21/2022]
Abstract
A simple and rapid HPLC method using 2-chloro-1-methyllepidinium tetrafluoroborate (CMLT) as a derivatization reagent was developed for simultaneous determination of homocysteine (Hcy), glutathione (GSH), γ-glutamylcysteine (γ-GluCys), cysteinylglycine (CysGly), N-acetylcysteine (NACys) and cysteine (Cys) in human saliva, plasma and urine. Separation of the analytes was achieved in just 7min using an HPLC, followed by UV detection at 355nm. Chromatographic separation was accomplished on Aeris PEPTIDE XB-C18 (150mm×4.6mm, 3.6µm) column from Phenomenex with a gradient elution: 0-4.0min, 7-30% B; 4.0-5.5min, 30-7% B; 5.5-7.5min, 7% B; (A: B, v/v); (A) 0.5% CH3COOH and (B) EtOH. Mobile phase was delivered at a flow rate 1.0mLmin(-1). Linearity in detector response for total thiols was observed over the range of 0.1-20μmolL(-1) for Hcy, GSH and γ-GluCys, 0.25-50μmolL(-1) for NACys and CysGly and 5-300 for Cys. The LOQ values for Hcy, GSH, γ-GluCys, NACys, CysGly and Cys were 0.05, 0.05, 0.10, 0.06, 0.12 and 0.08μmolL(-1), respectively. The method was successfully implemented to analysis of the samples donated by 15 apparently healthy volunteers and 10 patients.
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12
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Głowacki R, Stachniuk J, Borowczyk K, Jakubowski H. Quantification of homocysteine and cysteine by derivatization with pyridoxal 5'-phosphate and hydrophilic interaction liquid chromatography. Anal Bioanal Chem 2016; 408:1935-41. [PMID: 26794212 DOI: 10.1007/s00216-016-9308-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/14/2015] [Accepted: 01/04/2016] [Indexed: 01/29/2023]
Abstract
A simple and rapid assay using pyridoxal 5'-phosphate (PLP) as a derivatizing reagent was developed for the simultaneous determination of homocysteine (Hcy) and cysteine (Cys) in human plasma. Derivatization with PLP affords UV-absorbing tetrahydrothiazine and thiazolidine derivatives of Hcy and Cys, respectively. Separation of these derivatives was achieved in 5 min using a hydrophilic interaction liquid chromatography, followed by UV detection at 330 nm. Linearity in detector response was observed over the range of 0.25-20 μM for Hcy and 10-300 μM for Cys. The limit of quantification (LOQ) values for Hcy and Cys were 0.25 and 2.5 μM, respectively. The method was successfully applied to plasma samples donated by apparently healthy volunteers.
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Affiliation(s)
- Rafał Głowacki
- Faculty of Chemistry, Department of Environmental Chemistry, University of Łódź, 163 Pomorska Str., 90-236, Łódź, Poland.
| | - Justyna Stachniuk
- Faculty of Chemistry, Department of Environmental Chemistry, University of Łódź, 163 Pomorska Str., 90-236, Łódź, Poland
| | - Kamila Borowczyk
- Faculty of Chemistry, Department of Environmental Chemistry, University of Łódź, 163 Pomorska Str., 90-236, Łódź, Poland
| | - Hieronim Jakubowski
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers New Jersey Medical School, Newark, NJ, 07103, USA
- Department of Biochemistry and Biotechnology, University of Life Sciences, 60-637, Poznań, Poland
- Institute of Bioorganic Chemistry, 61-704, Poznań, Poland
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13
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Wong MG, Wanner C, Knight J, Perkovic V. Lowering cholesterol in chronic kidney disease: is it safe and effective? Eur Heart J 2015; 36:2988-95. [DOI: 10.1093/eurheartj/ehv393] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 07/27/2015] [Indexed: 01/11/2023] Open
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14
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Fanti P, Giustarini D, Rossi R, Cunningham SED, Folli F, Khazim K, Cornell J, Matteucci E, Bansal S. Dietary Intake of Proteins and Calories Is Inversely Associated With The Oxidation State of Plasma Thiols in End-Stage Renal Disease Patients. J Ren Nutr 2015; 25:494-503. [PMID: 26235932 DOI: 10.1053/j.jrn.2015.06.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 05/18/2015] [Accepted: 06/09/2015] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES Oxidative stress contributes to the pathogenesis of protein-energy wasting in maintenance hemodialysis (MHD) patients, but knowledge of specific effectors and mechanisms remains fragmented. Aim of the study was to define whether and how food intake is involved in the causal relationship between oxidative stress and protein-energy wasting. METHODS Seventy-one adult MHD patients and 24 healthy subjects (control) were studied cross-sectionally with analyses of diet record and of oxidative stress, as measured by a battery of plasma thiols including the protein sulfhydryl (-SH) group (PSH) levels (a marker of total protein-SH reducing capacity), the protein thiolation index (PTI, the ratio between disulfide, i.e., oxidized and reduced -SH groups in proteins), low molecular mass (LMM) thiols, LMM disulfides, and mixed LMM-protein disulfides. In addition, interleukin-6 (IL-6), albumin, C-reactive protein, and neutrophil gelatinase-associated lipocalin (NGAL) were measured as markers of inflammation. RESULTS The patients showed low energy (22.0 ± 8.4 kcal/kg/day) and adequate protein (1.0 ± 0.4 g/kg/day) intakes, high levels of cystine (CySS; patients vs. CONTROL 113.5 [90.9-132.8] vs. 68.2 [56.2-75.7] μM), cysteinylated proteins (CySSP; 216.0 [182.8-254.0] vs. 163.5 [150.0-195.5] μM), and high PTI (0.76 [0.61-0.88] vs. 0.43 [0.40-0.54]; P < .001 in all comparisons). In patients, variation of CySSP was explained by a standard regression model (R = 0.775; P = .00001) that included significant contributions of protein intake (β = -0.361), NGAL (β = 0.387), age (β = 0.295), and albumin (β = 0.457). In the same model, variation of PTI (R = 0.624; P = .01) was explained by protein intake (β = -0.384) and age (β = 0.326) and NGAL (β = 0.311). However, when PSH was entered as dependent variable (R = 0.730; P = .0001), only serum albumin (β = 0.495) and age (β = -0.280), but not dietary intake or NGAL, contributed to the model. CONCLUSIONS In MHD, markers of thiol oxidation including CySSP and PTI show independent association with dietary intake and NGAL, whereas PSH, a marker of thiol-reducing capacity, did not associate with these same variables. The mechanism(s) responsible for inverse association between oxidative stress and food intake in MHD remain undefined.
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Affiliation(s)
- Paolo Fanti
- Division of Nephrology, Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas; Renal Section Medicine Service, South Texas Veteran Health Care System, San Antonio, Texas.
| | - Daniela Giustarini
- Department of Life Sciences, Laboratory of Pharmacology and Toxicology, University of Siena, Siena, Italy
| | - Ranieri Rossi
- Department of Life Sciences, Laboratory of Pharmacology and Toxicology, University of Siena, Siena, Italy
| | - Sue E D Cunningham
- School of Health Professions, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Franco Folli
- Division of Diabetes, Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Khaled Khazim
- Nephrology and Hypertension Unit, Western Galilee Hospital, Nahariya, Israel
| | - John Cornell
- Department of Epidemiology and Biostatistics, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | | | - Shweta Bansal
- Division of Nephrology, Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas
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15
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Ma L, He J, Zhang X, Cui Y, Gao J, Tang X, Ding M. Determination of total, free, and reduced homocysteine and related aminothiols in uremic patients undergoing hemodialysis by precolumn derivatization HPLC with fluorescence detection. RSC Adv 2014. [DOI: 10.1039/c4ra10138c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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16
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Deger SM, Ellis CD, Bian A, Shintani A, Ikizler TA, Hung AM. Obesity, diabetes and survival in maintenance hemodialysis patients. Ren Fail 2014; 36:546-51. [PMID: 24467439 DOI: 10.3109/0886022x.2013.876351] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Increased body mass index (BMI) confers a survival advantage in maintenance hemodialysis (MHD) patients. Diabetic (diabetes mellitus (DM)) patients undergoing MHD have worse survival. There are limited studies examining the effect of obesity on the risk of death among MHD patients with diabetes. Ninety-eight MHD patients were studied for median follow-up time of 33 months. Patients were classified according to the presence of obesity (BMI ≥ 30 kg/m(2)) or DM. Primary outcome was all-cause mortality. Cox regression was used to evaluate the effect of obesity on time to death. Effect modification and mediation analysis were also performed. Mean age was 49 ± 13 years, 66% were male, 48% were obese and 34% were diabetic. Mortality rates (per 100 person-years) were: 3.4 for non-diabetic obese, 8.6 for non-diabetic non-obese, 14.3 for diabetic non-obese and 18.1 for diabetic obese patients. Log-rank comparing diabetic obese versus non-diabetic obese was significant (p=0.007). Diabetes was associated with an increased risk of mortality after adjustment for potential mediators. Effect modification of obesity in the mortality risk was different between patients with and without diabetes. With adjustment for adipokines, a greater effect modification by diabetes was observed; whereas, adjustment for inflammatory marker did not influence the effect modification. Diabetic obese MHD patients have increased mortality risk compared to non-diabetic obese. Obesity does not offer survival benefits in diabetic obese MHD patients and potentially may have detrimental effects. Larger studies evaluating the effect of adipokines and obesity in outcomes in the diabetic MHD population need to be undertaken.
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Affiliation(s)
- Serpil M Deger
- Department of Medicine, Division of Nephrology, Vanderbilt University Medical Center , Nashville, TN , USA
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17
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Himmelfarb J, Ikizler TA, Ellis C, Wu P, Shintani A, Dalal S, Kaplan M, Chonchol M, Hakim RM. Provision of antioxidant therapy in hemodialysis (PATH): a randomized clinical trial. J Am Soc Nephrol 2013; 25:623-33. [PMID: 24371300 DOI: 10.1681/asn.2013050545] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Increased markers of oxidative stress and acute-phase inflammation are prevalent in patients undergoing maintenance hemodialysis therapy (MHD), and are associated with increased mortality and hospitalization rates and decreased erythropoietin responsiveness. No adequately powered studies have examined the efficacy of antioxidant therapies on markers of inflammation and oxidative stress. We tested the hypothesis that oral antioxidant therapy over 6 months would decrease selected biomarkers of acute-phase inflammation and oxidative stress and improve erythropoietic response in prevalent MHD patients. In total, 353 patients were enrolled in a prospective, placebo-controlled, double-blind clinical trial and randomly assigned to receive a combination of mixed tocopherols (666 IU/d) plus α-lipoic acid (ALA; 600 mg/d) or matching placebos for 6 months (NCT00237718); 238 patients completed the study. High-sensitivity C-reactive protein (hsCRP) and IL-6 concentration were measured as biomarkers of systemic inflammation, and F2 isoprostanes and isofurans were measured as biomarkers of oxidative stress. The groups did not significantly differ at baseline. At 3 and 6 months, the treatment had no significant effect on plasma hsCRP, IL-6, F2 isoprostane, or isofuran concentrations and did not improve the erythropoietic response. No major adverse events were related to the study drug, and both groups had similar mortality and hospitalization rates during the study. In conclusion, the administration of mixed tocopherols and ALA was generally safe and well tolerated, but did not influence biomarkers of inflammation and oxidative stress or the erythropoietic response.
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Affiliation(s)
- Jonathan Himmelfarb
- Department of Medicine, Division of Nephrology, University of Washington, Seattle, Washington
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18
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Khazim K, Giustarini D, Rossi R, Verkaik D, Cornell JE, Cunningham SED, Mohammad M, Trochta K, Lorenzo C, Folli F, Bansal S, Fanti P. Glutathione redox potential is low and glutathionylated and cysteinylated hemoglobin levels are elevated in maintenance hemodialysis patients. Transl Res 2013; 162:16-25. [PMID: 23333585 PMCID: PMC3683567 DOI: 10.1016/j.trsl.2012.12.014] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 12/21/2012] [Accepted: 12/24/2012] [Indexed: 11/17/2022]
Abstract
Glutathione (GSH), the most abundant intracellular low molecular mass thiol, protects cells from oxidative damage and regulates their function. Available information is inconsistent regarding levels of GSH and its disulfide (GSSG) in maintenance hemodialysis patients (HD). In addition, very limited data are available in HD about the relationship of GSH and GSSG with other measures of thiol metabolism and with the clinical profile. We tested the hypothesis that erythrocyte GSH/GSSG redox potential (Eh) is lower in HD than in healthy controls (C), and that Eh correlates with posttranslational thiolation of hemoglobin (Hb) and with standard clinical parameters in HD. In cross-sectional comparison of 33 stable HD and 21 C, we found a net loss of reducing capacity in HD as indicated by low erythrocyte GSH/GSSG Eh (-257 ± 5.5 vs -270 ± 5.6 mV, P = 0.002). Glutathionylated Hb (HbSSG) was 46% higher in HD than C (19.3 ± 4.80 vs 13.2 ± 2.79 pmol/mg Hb; P = 0.001) and cysteinylated Hb (HbSSCy) was >3-fold higher in HD than C [38.3 (29.0-63.3) vs 11.5 (9.6-17.2) pmol/mg Hb; P = 0.001]. In multiple regression analysis of the HD cases, statistically significant associations were found between the GSH/GSSG Eh and the blood urea nitrogen (P = 0.001), creatinine (P = 0.015) and normalized protein catabolic rate (P = 0.05), after adjusting for age, race/ethnicity, and etiology of end-stage renal disease. In conclusion, accurate and precise analysis of GSH, GSSG, and mixed disulfides reveals loss of erythrocyte GSH/GSSG Eh, rise of both HbSSG and HbSSCy, and correlation of these thiols with measures of uremia and dietary protein intake.
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Affiliation(s)
- Khaled Khazim
- Department of Medicine, University of Texas Health Science Center San Antonio, San Antonio, TX 78229, USA
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Yamazaki-Nakazawa A, Mizobuchi M, Ogata H, Kumata C, Kondo F, Ono N, Koiwa F, Uda S, Kinugasa E, Akizawa T. Correction of hyperphosphatemia suppresses cardiac remodeling in uremic rats. Clin Exp Nephrol 2013; 18:56-64. [PMID: 23740131 DOI: 10.1007/s10157-013-0816-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 05/06/2013] [Indexed: 01/14/2023]
Abstract
BACKGROUND Hyperphosphatemia is associated with cardiovascular disease in patients with chronic kidney disease. To examine the effects of correction of hyperphosphatemia, we investigated the association between phosphate metabolism and cardiac remodeling in uremic rats. METHODS Four groups were studied for 8 weeks: (1) control (sham), (2) 5/6 nephrectomized (Nx) rats fed a normal phosphate regular diet (Nx + NP), (3) Nx rats fed a high phosphate (1.2 %) diet (Nx + HP), and (4) Nx rats fed a high phosphate diet containing 2 % lanthanum carbonate (Nx + HP + La). The relationship between phosphate metabolism and cardiac remodeling was analyzed. RESULTS Nx + HP rats showed a significant increase in serum phosphate and PTH compared with Nx + NP rats, while Nx + HP + La rats showed slight decreases in these levels. Both Nx + HP and Nx + HP + La rats showed a significant increase in fibroblast growth factor-23 (FGF23) compared with Nx + NP rats. Urinary phosphate excretion showed a similar trend to that of FGF23. Nx + HP rats showed a significant increase in LV weight and matrix deposition compared with Nx + NP rats, and this increase was also significantly suppressed in Nx + HP + La rats. Serum phosphate levels and PTH were significantly correlated with LV weight and matrix deposition, but FGF23 levels did not show the correlation. FGF23 had a high correlation with urinary phosphate excretion. CONCLUSIONS These results suggest that correction of hyperphosphatemia by lanthanum carbonate could suppress cardiac remodeling independently of changes in FGF23.
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Affiliation(s)
- Ai Yamazaki-Nakazawa
- Division of Nephrology, Department of Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8666, Japan
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20
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Kennedy DJ, Tang WHW, Fan Y, Wu Y, Mann S, Pepoy M, Hazen SL. Diminished antioxidant activity of high-density lipoprotein-associated proteins in chronic kidney disease. J Am Heart Assoc 2013; 2:e000104. [PMID: 23557751 PMCID: PMC3647254 DOI: 10.1161/jaha.112.000104] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Background Decreased serum arylesterase activity, catalyzed by the high‐density lipoprotein–associated paraoxonase (PON)‐1, is associated with increased oxidant stress and atherosclerosis risk. We sought to determine the prognostic value of serum PON‐1 activity, as monitored by PON or arylesterase activities, in subjects with chronic kidney disease (CKD), particularly in relation to established cardiac biomarkers. Methods and Results Serum arylesterase and PON activities were measured in sequential subjects with CKD (n=630; estimated glomerular filtration rate [eGFR] <60 mL/min per 1.73 m2) and an age‐ and sex‐matched control group of non‐CKD subjects (n=315) presenting for cardiac evaluations and prospectively followed for incident (3‐year) major adverse cardiac events (composite of death, nonfatal myocardial infarction, and stroke). Serum arylesterase activity in CKD subjects was lower compared with that in non‐CKD control subjects [median (interquartile range) 94 (77 to 112) versus 103 (85 to 121) μmol(L·min) per mL, P<0.001]; similarly, PON activity in CKD subjects was lower compared with that in non‐CKD control subjects [median (interquartile range) 474 (275 to 936) versus 586 (301 to 1118) nmol(L·min) per mL, P<0.001]. Lower serum arylesterase (hazard ratio 1.8, 95% CI 1.26 to 2.57, P<0.01) was a predictor of poorer outcomes. After adjusting for traditional risk factors and medication use, lower serum arylesterase (hazard ratio 1.55, 95% CI 1.08 to 2.23, P<0.05) still conferred an increased risk of major adverse cardiac events at 3 years. Conclusions In patients with CKD, decreased serum arylesterase activity, a measure of diminished antioxidant properties of PON‐1, predicts higher risk of incident long‐term adverse cardiovascular events (heart attack, stroke, or death) in multivariable models adjusting for established clinical and biochemical risk factors.
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Affiliation(s)
- David J Kennedy
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH 44195, USA
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21
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Popolo A, Autore G, Pinto A, Marzocco S. Oxidative stress in patients with cardiovascular disease and chronic renal failure. Free Radic Res 2013; 47:346-56. [PMID: 23438723 DOI: 10.3109/10715762.2013.779373] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Oxidative response regulates many physiological response in human health, but if not properly regulated it could also lead to a number of deleterious effects. The importance of oxidative stress injury depends on the molecular target, the severity of the stress, and the mechanism by which the oxidative stress is imposed: it has been implicated in several diseases including cancer, neurodegenerative diseases, malaria, rheumatoid arthritis and cardiovascular and kidney disease. Most of the common diseases, such as hypertension, atherosclerosis, heart failure, and renal dysfunction, are associated with vascular functional and structural alterations including endothelial dysfunction, altered contractility, and vascular remodeling. Common to these processes is increased bioavailability of reactive oxygen species (ROS), decreased nitric oxide (NO) levels, and reduced antioxidant capacity. Oxidative processes are up-regulated also in patients with chronic renal failure (CRF) and seem to be a cause of elevated risk of morbidity and mortality in these patients. In this review, we highlight the role of oxidative stress in cardiovascular and renal disease.
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Affiliation(s)
- A Popolo
- Department of Pharmacy, School of Pharmacy, University of Salerno, Fisciano (SA), Italy
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22
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Kennedy DJ, Wilson Tang WH, Fan Y, Wu Y, Mann S, Pepoy M, Hazen SL. Diminished Antioxidant Activity of High‐Density Lipoprotein–Associated Proteins in Chronic Kidney Disease. J Am Heart Assoc 2013. [DOI: 10.1161/jaha.113.000104] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- David J. Kennedy
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH
- Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH
| | - W. H. Wilson Tang
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH
- Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
| | - Yiying Fan
- Department of Mathematics, Cleveland State University, Cleveland, OH
| | - Yuping Wu
- Department of Mathematics, Cleveland State University, Cleveland, OH
| | - Shirley Mann
- Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
| | - Michael Pepoy
- Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
| | - Stanley L. Hazen
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH
- Center for Cardiovascular Diagnostics and Prevention, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
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Piroddi M, Bartolini D, Ciffolilli S, Galli F. Nondialyzable Uremic Toxins. Blood Purif 2013; 35 Suppl 2:30-41. [DOI: 10.1159/000350846] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Wada M, Hirose M, Kuroki M, Ikeda R, Sekitani Y, Takamura N, Kuroda N, Nakashima K. Simultaneous determination of homocysteine, methionine and cysteine in maternal plasma after delivery by HPLC-fluorescence detection with DBD-F as a label. Biomed Chromatogr 2012; 27:708-13. [DOI: 10.1002/bmc.2848] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Accepted: 10/26/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Mitsuhiro Wada
- Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi; Nagasaki; 852-8521; Japan
| | - Maki Hirose
- Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi; Nagasaki; 852-8521; Japan
| | - Mana Kuroki
- Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi; Nagasaki; 852-8521; Japan
| | - Rie Ikeda
- Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi; Nagasaki; 852-8521; Japan
| | - Yui Sekitani
- Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi; Nagasaki; 852-8521; Japan
| | - Noboru Takamura
- Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi; Nagasaki; 852-8521; Japan
| | - Naotaka Kuroda
- Graduate School of Biomedical Sciences; Nagasaki University; 1-14 Bunkyo-machi; Nagasaki; 852-8521; Japan
| | - Kenichiro Nakashima
- Faculty of Pharmaceutical Sciences; Nagasaki International University; 2825-7 Huis Ten Bosch; Sasebo; Nagasaki; 859-3298; Japan
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Makówka A, Dryja P, Chwatko G, Bald E, Nowicki M. Treatment of chronic hemodialysis patients with low-dose fenofibrate effectively reduces plasma lipids and affects plasma redox status. Lipids Health Dis 2012; 11:47. [PMID: 22564753 PMCID: PMC3390906 DOI: 10.1186/1476-511x-11-47] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2012] [Accepted: 05/07/2012] [Indexed: 12/17/2022] Open
Abstract
Dyslipidemia is common in chronic hemodialysis patients and its underlying mechanism is complex. Hemodialysis causes an imbalance between antioxidants and production of reactive oxygen species, which induces the oxidative stress and thereby may lead to accelerated atherosclerosis. Statins have been found to be little effective in end-stage kidney disease and other lipid-lowering therapies have been only scarcely studied. The study aimed to assess the effect of low-dose fenofibrate therapy on plasma lipids and redox status in long-term hemodialysis patients with mild hypertriglyceridemia. Twenty seven chronic hemodialysis patients without any lipid-lowering therapy were included in a double-blind crossover, placebo-controlled study. The patients were randomized into two groups and were given a sequence of either 100 mg of fenofibrate per each hemodialysis day for 4 weeks or placebo with a week-long wash-out period between treatment periods. Plasma lipids, high sensitive C-reactive protein (CRP), urea, creatinine, electrolytes, phosphocreatine kinase (CK), GOT, GPT and plasma thiols (total and free glutathione, homocysteine, cysteine and cysteinylglycine) were measured at baseline and after each of the study periods. Plasma aminothiols were measured by reversed phase HPLC with thiol derivatization with 2-chloro-1-methylquinolinium tetrafluoroborate. Fenofibrate therapy caused a significant decrease of total serum cholesterol, LDL cholesterol and triglycerides and an increase of HDL cholesterol. The treatment was well tolerated with no side-effects but there was a small but significant increase of CK not exceeding the upper limit of normal range. There were no changes of serum CRP, potassium, urea, and creatinine and liver enzymes during the treatment. Neither total nor total free cysteinylglycine and cysteine changed during the study but both total and free glutathione increased during the therapy with fenofibrate and the same was observed in case of plasma homocysteine. The study shows that a treatment with reduced fenofibrate dose is safe and effective in reducing serum triglycerides and cholesterol in chronic dialysis patients and may shift plasma aminothiol balance towards a more antioxidative pattern.
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Affiliation(s)
- Agnieszka Makówka
- Department of Nephrology, Hypertension and Kidney Transplantation, Medical University of Łódź, Łódź, Poland
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Perna AF, Sepe I, Lanza D, Pollastro RM, De Santo NG, Ingrosso D. Hyperhomocysteinemia in Chronic Renal Failure: Alternative Therapeutic Strategies. J Ren Nutr 2012; 22:191-4. [DOI: 10.1053/j.jrn.2011.10.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Accepted: 10/13/2011] [Indexed: 11/11/2022] Open
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27
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Evaluation of Cysteine Effect on Redox Potential of Porcine Liver Preserved by Simple Hypothermia. Transplant Proc 2011; 43:2897-9. [DOI: 10.1016/j.transproceed.2011.08.065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Anraku M, Takeuchi K, Watanabe H, Kadowaki D, Kitamura K, Tomita K, Kuniyasu A, Suenaga A, Maruyama T, Otagiri M. Quantitative Analysis of Cysteine-34 On the Anitioxidative Properties of Human Serum Albumin in Hemodialysis Patients. J Pharm Sci 2011; 100:3968-76. [DOI: 10.1002/jps.22571] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 02/01/2011] [Accepted: 03/16/2011] [Indexed: 12/16/2022]
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Matsumoto Y, Mukai M, Arihara K, Saito T, Kumagai H. Ethylene-Vinyl Alcohol Copolymer Dialyzer Membrane Reduces Protein Oxidation in Hemodialysis Patients. Ren Fail 2011; 33:382-7. [DOI: 10.3109/0886022x.2011.568134] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Gosmanova EO, Le NA. Cardiovascular Complications in CKD Patients: Role of Oxidative Stress. Cardiol Res Pract 2011; 2011:156326. [PMID: 21253517 PMCID: PMC3022166 DOI: 10.4061/2011/156326] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Accepted: 12/08/2010] [Indexed: 11/20/2022] Open
Abstract
Starting with the early stages, patients with chronic kidney disease (CKD) experience higher burden of cardiovascular disease (CVD). Moreover, CVD complications are the major cause of mortality in CKD patients as compared with complications from chronic kidney failure. While traditional CVD risk factors, including diabetes, hypertension, hyperlipidemia, obesity, physical inactivity, may be more prevalent among CKD patients, these factors seem to underestimate the accelerated cardiovascular disease in the CKD population. Search for additional biomarkers that could explain the enhanced CVD risk in CKD patients has gained increasing importance. Although it is unlikely that any single nontraditional risk factor would fully account for the increased CVD risk in individuals with CKD, oxidative stress appears to play a central role in the development and progression of CVD and its complications. We will review the data that support the contribution of oxidative stress in the pathogenesis of CVD in patients with chronic kidney failure.
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Affiliation(s)
- Elvira O Gosmanova
- Nephrology Division, Department of Medicine, The University of Tennessee Health Science Center, Memphis, TN 38103, USA
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Coelho BL, Rocha LG, Scarabelot KS, Scheffer DL, Ronsani MM, Silveira PC, Silva LA, Souza CT, Pinho RA. Physical Exercise Prevents the Exacerbation of Oxidative Stress Parameters in Chronic Kidney Disease. J Ren Nutr 2010; 20:169-75. [DOI: 10.1053/j.jrn.2009.10.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Indexed: 01/06/2023] Open
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Ichinose S, Nakamura M, Maeda M, Ikeda R, Wada M, Nakazato M, Ohba Y, Takamura N, Maeda T, Aoyagi K, Nakashima K. A validated HPLC-fluorescence method with a semi-micro column for routine determination of homocysteine, cysteine and cysteamine, and the relation between the thiol derivatives in normal human plasma. Biomed Chromatogr 2009; 23:935-9. [PMID: 19353732 DOI: 10.1002/bmc.1205] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A semi-micro column HPLC-fluorescence method for routine determination of thiol derivatives such as homocysteine (Hcy), cysteine (Cys) and cysteamine (CA) is described. The thiol derivatives labeled with ammonium-7-fluorobenzo-2-oxa-1,3-diazole-4-sulfonate (SBD-F) were isocratically separated within 12 min on a semi-micro ODS column (Daisopak-SP-120-5-ODS-BP) with a mixture of 25 mm acetate buffer (pH 2.00) and CH(3)CN as a mobile phase. The purity and similarity of SBD-thiols by a multi-wavelength fluorescence detector were more than 92.3 and 96.7%. The detection limits of Hcy, Cys and CA at a signal-to-noise ratio of 3 were 0.16, 0.47 and 0.03 microm, respectively. Furthermore validation parameters such as accuracy, precision and robustness of the proposed method showed satisfactory results. Almost 850 plasma sample injections (range 572-1076, n = 3) for a column could be performed without differences in retention time and peak heights of labels. As an application of the proposed method, the determination of thiol derivatives in normal human plasma (n = 103) was demonstrated. The correlation coefficients between Hcy vs Cys and Hcy vs CA were 0.38 and -0.35, respectively.
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Affiliation(s)
- Saori Ichinose
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, Japan
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Mautjana N, Looi D, Eyler J, Brajter-Toth A. Sensitivity of Positive Ion Mode Electrospray Ionization Mass Spectrometry in the Analysis of Thiol Metabolites. ELECTROANAL 2009. [DOI: 10.1002/elan.200900284] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kasımay Ö, Şener G, Çakır B, Yüksel M, Çetinel Ş, Contuk G, Yeğen BÇ. Estrogen Protects against Oxidative Multiorgan Damage in Rats with Chronic Renal Failure. Ren Fail 2009; 31:711-25. [DOI: 10.3109/08860220903134563] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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Fully automated method for simultaneous determination of total cysteine, cysteinylglycine, glutathione and homocysteine in plasma by HPLC with UV absorbance detection. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:3400-4. [DOI: 10.1016/j.jchromb.2009.06.012] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Revised: 06/03/2009] [Accepted: 06/08/2009] [Indexed: 11/19/2022]
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Simultaneous analysis of multiple aminothiols in human plasma by high performance liquid chromatography with fluorescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:3274-81. [DOI: 10.1016/j.jchromb.2009.05.046] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 05/18/2009] [Accepted: 05/21/2009] [Indexed: 11/18/2022]
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Rutkowski P, Słominska EM, Szołkiewicz M, Aleksandrowicz E, Smolenski RT, Wołyniec W, Renke M, Wisterowicz K, Swierczynski J, Rutkowski B. Relationship between uremic toxins and oxidative stress in patients with chronic renal failure. ACTA ACUST UNITED AC 2009; 41:243-8. [PMID: 17469035 DOI: 10.1080/00365590601017170] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE Uremic toxins play a critical role in the manifestation of the uremic syndrome. This is a consequence of retention of such substances in chronic renal failure patients and interactions between them. To date >100 uremic compounds have been discovered. The aim of this study was to elucidate potential relationships between N-methyl-2-pyridone-5-carboxamide (Me2PY) and N-methyl-4-pyridone-5-carboxamide (Me4PY), two uremic compounds, and different parameters of oxidative stress. MATERIAL AND METHODS Forty-three non-dialyzed patients at the Nephrological Outpatients Clinic of Gdansk were enrolled and divided into two groups: (i) 20 patients with a mean estimated glomerular filtration rate (eGFR) of 22.7 ml/min/1.73 m(2); and (ii) 23 patients with a mean eGFR of 12.4 ml/min/1.73 m(2). In both groups, the plasma concentrations of uremic toxins (Me2PY, Me4PY, creatinine), malonyldialdehyde (MDA) and carbonyl groups and the erythrocyte concentration of glutathione (GSH) were analyzed. Correlations between uremic toxins and oxidative stress markers were calculated using Pearson's correlation. RESULTS We observed significant correlations between serum creatinine and Me2PY (r=0.68; p=0.00001), eGFR and Me2PY (r=-0.55; p=0.00001), Me4PY and serum creatinine (r=0.64, p=0.00001), Me4PY and eGFR (r=-0.59; p=0.00008), MDA and Me2PY (r=0.42; p=0.006), MDA and Me4PY (r=0.38; p=0.02), GSH and Me2PY (r=-0.37; p=0.02) and GSH and Me4PY (r=-0.46; p=0.005), and in particular in patients with severe renal impairment. CONCLUSIONS We conclude that there is a relationship between the novel uremic toxins described and oxidative stress markers. However, elucidation of the exact pathogenetic links requires further detailed studies.
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Affiliation(s)
- Przemyslaw Rutkowski
- Department of Nephrology, Transplantology and Internal Diseases, Medical University of Gdansk, Gdansk, Poland.
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Apeland T, Kristensen O, Mansoor MA. The aminothiol redox status in haemodialysis patients does not improve with folate therapy. Scandinavian Journal of Clinical and Laboratory Investigation 2009; 69:265-71. [DOI: 10.1080/00365510802521143] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
Methylglyoxal (MG) is a reactive dicarbonyl intermediate of the glycolytic pathway. Increased oxidative stress is associated with conditions of increased MG, such as diabetes mellitus. Increased oxidative stress is due to an increase in highly reactive by-products of metabolic pathways, the so-called reactive oxygen species, such as superoxide anion, hydroxyl radical, hydrogen peroxide, nitric oxide and peroxynitrite. These reactive species react with a variety of proteins, enzymes, lipids, DNA and other molecules and disrupt their normal function. Oxidative stress causes many pathological changes that lead to vascular complications of diabetes mellitus, hypertension, neurodegenerative diseases and aging. In this review we summarize the correlation of elevated MG and various reactive oxygen species, and the enzymes that produce them or take part in their disposal, such as antioxidant enzymes and cofactors. The findings reported in various studies reviewed have started filling in gaps in our knowledge that will ultimately provide us with a clear picture of how the whole process that causes cellular dysfunction is initiated.
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Affiliation(s)
- Kaushik M Desai
- Department of Pharmacology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
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Palleschi S, De Angelis S, Rossi B, Diana L, Papa V, Severini G, Splendiani G. Homocysteinemia correlates with plasma thiol redox status in patients with end-stage renal disease. Nephron Clin Pract 2008; 108:c106-12. [PMID: 18212512 DOI: 10.1159/000113527] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2007] [Accepted: 10/17/2007] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND/AIMS In end-stage renal disease (ESRD), hyperhomocysteinemia is a common finding associated with increased cardiovascular risk. However, the pathogenic role of homocysteine is still unclear. In vitro studies show that thiol redox status affects endothelial cell functions. We therefore investigated the possible association between homocysteinemia and plasma thiol redox status in ESRD patients. METHODS Total plasma homocysteine (Hcy), cysteine (Cys) and free thiols (SH) were measured both before and after a dialytic session in 54 ESRD patients receiving (n = 15) or not receiving (n = 39) folate supplementation, and 17 control subjects. RESULTS High predialysis levels of both Hcy and Cys were found to be negatively correlated with low SH levels both in supplemented (r = -0.680, p < 0.01 and r = -0.624, p < 0.02, respectively) and unsupplemented (r = -0.698, p < 0.001 and r = -0.445, p < 0.01, respectively) patients. Following dialysis, SH values returned to normal and the above correlations were no longer appreciable. CONCLUSION A strong, folate therapy-insensitive association between homocysteinemia and plasma free thiol levels was found in ESRD patients. These results support a role for oxidative stress in ESRD-related hyperhomocysteinemia and suggest the plasma thiol redox status alteration as a possible pathogenic mechanism underlying the cardiovascular toxicity of hyperhomocysteinemia in these patients.
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Affiliation(s)
- Simonetta Palleschi
- Department of Hematology, Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy.
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Affiliation(s)
- Timothy W Meyer
- Stanford University School of Medicine, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
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Nolin TD, McMenamin ME, Himmelfarb J. Simultaneous determination of total homocysteine, cysteine, cysteinylglycine, and glutathione in human plasma by high-performance liquid chromatography: application to studies of oxidative stress. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 852:554-61. [PMID: 17336168 PMCID: PMC1959569 DOI: 10.1016/j.jchromb.2007.02.024] [Citation(s) in RCA: 172] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2006] [Revised: 02/08/2007] [Accepted: 02/10/2007] [Indexed: 11/25/2022]
Abstract
A sensitive, reproducible, and robust high-performance liquid chromatography (HPLC) method has been validated for simultaneously determining total concentrations of the aminothiols homocysteine, cysteine, cysteinylglycine, and glutathione in human plasma. Plasma aminothiols are reduced via incubation with tris-(2-carboxyethyl)-phosphine hydrochloride, followed by protein precipitation with trichloroacetic acid and derivatization with ammonium-7-fluorobenzo-2-oxa-1,3-diazole-4-sulfonic acid. Separation of aminothiols and the internal standard mercaptopropionylglycine is achieved using reversed-phase HPLC conditions and fluorescence detection. Excellent linearity is observed for all analytes over their respective concentration ranges with correlation coefficients (r) > 0.99. The intra- and inter-day precision and accuracy were within +/-10%. This method utilizes an internal standard, employs phosphate buffered saline-based standards and quality controls, and demonstrates excellent plasma recovery and improved sensitivity. This assay is well suited for high-throughput quantitative determination of aminothiols in clinical studies, and is currently being used to support investigations of oxidative stress in patients with chronic kidney disease.
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Affiliation(s)
- Thomas D Nolin
- Division of Nephrology and Transplantation, Department of Medicine, Maine Medical Center, 22 Bramhall Street, Portland, ME 04102, USA.
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Kerr PG, Sutherland WHF, de Jong S, Vaithalingham I, Williams SM, Walker RJ. The Impact of Standard High-Flux Polysulfone Versus Novel High-Flux Polysulfone Dialysis Membranes on Inflammatory Markers: A Randomized, Single-Blinded, Controlled Clinical Trial. Am J Kidney Dis 2007; 49:533-9. [PMID: 17386321 DOI: 10.1053/j.ajkd.2006.12.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2006] [Accepted: 12/26/2006] [Indexed: 11/11/2022]
Abstract
BACKGROUND This study is a prospective, randomized, single-blind, clinical trial over 12 months involving 60 stable hemodialysis patients comparing standard high-flux polysulfone dialyzer membranes with a novel high-flux polysulfone dialyzer membrane (Helixone; Fresenius Medical Care, St Wendel, Germany) modified in the fiber-spinning process to enhance middle-molecule clearance through changing the distribution of pore size and increased filtration. METHODS Markers of protein and lipid oxidation and inflammatory markers, including proinflammatory cytokines and cell adhesion molecules, were compared. The hypothesis tested was that improved clearances of middle molecules with the FX80 membrane would lead to less oxidative stress and inflammation compared with the high-flux polysulfone (HF80) membrane. RESULTS Type of dialysis membrane used did not significantly affect lipid and protein peroxidation, C-reactive protein level, interleukin 6 level, or sgp130 level during 12 months. beta(2)-Microglobulin concentrations decreased significantly in the Helixone membrane group compared with those dialyzed using conventional polysulfone membranes during the study (-15%; 95% confidence interval, -20 to -10). CONCLUSION Long-term dialysis with a Helixone membrane did not modify any parameters of oxidative stress or inflammation in this stable hemodialysis population compared with a high-flux polysulfone dialysis membrane.
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Affiliation(s)
- Peter G Kerr
- Department of Nephrology, Monash Medical Centre, Victoria, Australia
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Piroddi M, Depunzio I, Calabrese V, Mancuso C, Aisa CM, Binaglia L, Minelli A, Butterfield AD, Galli F. Oxidatively-modified and glycated proteins as candidate pro-inflammatory toxins in uremia and dialysis patients. Amino Acids 2007; 32:573-92. [PMID: 17356806 DOI: 10.1007/s00726-006-0433-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2006] [Accepted: 02/02/2007] [Indexed: 02/07/2023]
Abstract
End stage renal disease (ESRD) patients accumulate blood hallmarks of protein glycation and oxidation. It is now well established that these protein damage products may represent a heterogeneous class of uremic toxins with pro-inflammatory and pro-oxidant properties. These toxins could be directly involved in the pathogenesis of the inflammatory syndrome and vascular complications, which are mainly sustained by the uremic state and bioincompatibility of dialysis therapy. A key underlying event in the toxicity of these proteinaceous solutes has been identified in scavenger receptor-dependent recognition and elimination by inflammatory and endothelial cells, which once activated generate further and even more pronounced protein injuries by a self-feeding mechanism based on inflammation and oxidative stress-derived events. This review examines the literature and provides original information on the techniques for investigating proteinaceous pro-inflammatory toxins. We have also evaluated therapeutic - either pharmacological or dialytic - strategies proposed to alleviate the accumulation of these toxins and to constrain the inflammatory and oxidative burden of ESRD.
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Affiliation(s)
- M Piroddi
- Department of Internal Medicine, Section of Applied Biochemistry and Nutritional Sciences, University of Perugia, Perugia, Italy
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Yoon JW, Pahl MV, Vaziri ND. Spontaneous leukocyte activation and oxygen-free radical generation in end-stage renal disease. Kidney Int 2006; 71:167-72. [PMID: 17136029 DOI: 10.1038/sj.ki.5002019] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Oxidative stress and inflammation are common features and major mediators of atherosclerosis in end-stage renal disease (ESRD). Available evidence for oxidative stress in ESRD is indirect and based on accumulation of byproducts of interactions of reactive oxygen species (ROS) with various molecules. Inflammation is a major cause of oxidative stress. To explore the direct link between oxidative stress and inflammation in ESRD, we studied leukocyte integrin expression and ROS production in 18 ESRD patients and 18 controls. ESRD patients showed elevated plasma malondialdehyde (MDA) and increased superoxide and hydrogen peroxide (H(2)O(2)) production by granulocytes and monocytes before dialysis. Hemodialysis resulted in a further rise in plasma MDA and H(2)O(2) production by granulocytes and monocytes. Surface expression of Mac-1 (CD11b and CD18) on granulocytes and monocytes was significantly increased (denoting cell activation) in ESRD patients. Granularity of granulocytes was significantly reduced before dialysis and declined further after dialysis. The magnitude of ROS production by granulocytes and monocytes was directly related with CD11b expression as well as plasma ferritin and parathyroid hormone levels and was inversely related to protein catabolic rate. Thus, this study provides direct evidence of spontaneous leukocyte activation and increased ROS generation (hence the link between oxidative stress and inflammation) in ESRD patients.
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Affiliation(s)
- J W Yoon
- Division of Nephrology and Hypertension, Hallym University, Chuncheon, Korea
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Capeillère-Blandin C, Gausson V, Nguyen AT, Descamps-Latscha B, Drüeke T, Witko-Sarsat V. Respective role of uraemic toxins and myeloperoxidase in the uraemic state. Nephrol Dial Transplant 2006; 21:1555-63. [PMID: 16476719 DOI: 10.1093/ndt/gfl007] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND In haemodialysis (HD) patients, advanced oxidation protein products (AOPP) were previously ascribed to oxidized plasma proteins, resulting mainly from increased myeloperoxidase (MPO) activity. The aim of the present study was to assess the mechanisms leading to the generation of AOPP during the course of chronic kidney disease including end-stage renal disease, with particular focus on AOPP and MPO characterization in the plasma at decreasing levels of kidney function. METHODS Phagocyte activation was evaluated by whole blood NADPH oxidase and MPO activities. In plasma, MPO protein concentration was quantified by ELISA and catalytic activity assayed by the spectrophotometric detection of phenol and 4-aminoantipyrine (AAP) co-oxidation in the presence of hydrogen peroxide (H(2)O(2)). RESULTS In HD patients, plasma AOPP concentration was linked to neutrophil oxidative activity. Such an association was not found in control subjects or predialysis patients, suggesting that in the latter, AOPP generation did not mainly result from MPO released by activated neutrophils. Similarly, plasma AOPP correlated with plasma MPO protein concentration in HD patients, but not in control subjects or predialysis patients, suggesting that in the latter AOPP did not predominantly result from MPO activity. This interpretation was supported by the observation of a greater degree of co-oxidation of phenol and AAP in the absence of H(2)O(2) in predialysis patients than in HD patients or control subjects. The contribution of MPO dramatically differed between predialysis and HD patients (2+/-5 vs 46+/-6%; P<0.001). CONCLUSION Our observations suggest that AOPP generation in predialysis patients mainly results from MPO-independent oxidation mechanisms.
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Kennedy DJ, Vetteth S, Periyasamy SM, Kanj M, Fedorova L, Khouri S, Kahaleh MB, Xie Z, Malhotra D, Kolodkin NI, Lakatta EG, Fedorova OV, Bagrov AY, Shapiro JI. Central role for the cardiotonic steroid marinobufagenin in the pathogenesis of experimental uremic cardiomyopathy. Hypertension 2006; 47:488-95. [PMID: 16446397 DOI: 10.1161/01.hyp.0000202594.82271.92] [Citation(s) in RCA: 205] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Patients with chronic renal failure develop a "uremic" cardiomyopathy characterized by diastolic dysfunction, cardiac hypertrophy, and systemic oxidant stress. Patients with chronic renal failure are also known to have increases in the circulating concentrations of the cardiotonic steroid marinobufagenin (MBG). On this background, we hypothesized that elevations in circulating MBG may be involved in the cardiomyopathy. First, we observed that administration of MBG (10 microg/kg per day) for 4 weeks caused comparable increases in plasma MBG as partial nephrectomy at 4 weeks. MBG infusion caused increases in conscious blood pressure, cardiac weight, and the time constant for left ventricular relaxation similar to partial nephrectomy. Decreases in the expression of the cardiac sarcoplasmic reticulum ATPase, cardiac fibrosis, and systemic oxidant stress were observed with both MBG infusion and partial nephrectomy. Next, rats were actively immunized against a MBG-BSA conjugate or BSA control, and partial nephrectomy was subsequently performed. Immunization against MBG attenuated the cardiac hypertrophy, impairment of diastolic function, cardiac fibrosis, and systemic oxidant stress seen with partial nephrectomy without a significant effect on conscious blood pressure. These data suggest that the increased concentrations of MBG are important in the cardiac disease and oxidant stress state seen with renal failure.
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Affiliation(s)
- David J Kennedy
- Department of Medicine, Medical University of Ohio, Toledo, OH 43614-5809, USA
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Sjöberg B, Anderstam B, Suliman M, Alvestrand A. Plasma Reduced Homocysteine and Other Aminothiol Concentrations in Patients With CKD. Am J Kidney Dis 2006; 47:60-71. [PMID: 16377386 DOI: 10.1053/j.ajkd.2005.09.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2005] [Accepted: 09/20/2005] [Indexed: 11/11/2022]
Abstract
BACKGROUND Hyperhomocysteinemia, a risk factor for cardiovascular disease, is present in the majority of patients with chronic kidney disease (CKD). Several studies indicated that the moiety of homocysteine (Hcy) with an unbound -SH group (reduced Hcy [rHcy]) is the atherogenic molecule. This study is designed to examine the relation between different forms of Hcy and other aminothiols in hemodialysis (HD) patients, peritoneal dialysis (PD) patients, and nondialyzed patients with CKD. METHODS rHcy, free Hcy (fHcy), and total Hcy (tHcy), as well as different forms of cysteine, cysteinyl-glycine, and glutathione, were studied by using a high-performance liquid chromatography technique in 19 HD patients, 12 PD patients, 47 patients with CKD, and 15 control subjects. RESULTS In PD patients, tHcy levels were 2.8 times greater compared with controls, and in HD patients and those with CKD, 2.1 and 1.9 times greater, respectively. Mean rHcy/tHcy ratios were significantly greater in both HD (P < 0.05) and PD patients (P < 0.01), but did not differ in patients with CKD compared with controls. The decrease in rHcy levels during 1 HD treatment was smaller than that in tHcy and fHcy levels, and rHcy/tHcy ratio increased (before HD, 1.25% +/- 0.44%; after HD, 1.44% +/- 0.66%; P < 0.05). CONCLUSION Levels of rHcy and other aminothiols are markedly increased in patients with impaired renal function. In dialysis patients, rHcy/tHcy ratio is markedly elevated and shows greater variability than in patients with CKD and controls. We conclude that because rHcy is believed to induce endothelial dysfunction and may be part of the accelerated atherogenic process in patients with CKD, plasma rHcy level could be a more relevant marker of cardiovascular disease risk than tHcy level.
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Affiliation(s)
- Bodil Sjöberg
- Division of Renal Medicine, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
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Diepeveen SHA, Verhoeven GHWE, van der Palen J, Dikkeschei BLD, van Tits BLJ, Kolsters G, Offerman JJG, Bilo HJG, Stalenhoef AFH. The effect of the initiation of renal replacement therapy on lipid profile and oxidative stress during the first 6 months of treatment. Clin Chim Acta 2005; 361:112-8. [PMID: 16122722 DOI: 10.1016/j.cccn.2005.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2004] [Revised: 05/04/2005] [Accepted: 05/04/2005] [Indexed: 12/17/2022]
Abstract
BACKGROUND Disturbed lipoproteins and increased oxidative stress are two of the "non-traditional" cardiovascular risk factors in chronic renal failure. There are very few prospective data of the influence of dialysis on these two factors. In the present study we investigated the effects of the initiation of both hemo- and peritoneal dialysis therapy on lipoproteins and parameters of LDL oxidation. METHODS In this prospective cohort study, we assessed lipoproteins, plasma lipid peroxides and in vitro copper-induced LDL oxidation in 46 patients with end-stage renal disease prior to the start of dialysis and after 6 months of treatment with either hemodialysis (n=33) or peritoneal dialysis (n=13). RESULTS After 6 months of treatment with hemodialysis there was an increase in total cholesterol (4.6+/-1.1 vs. 5.0+/-1.3 mmol/l; p<0.05) and triglycerides (2.0+/-0.9 vs. 2.8+/-1.6 mmol/l; p<0.03). In the peritoneal dialysis group the lipoproteins did not change. Regarding lipid peroxides and in vitro copper-induced LDL oxidation, also no changes were observed after 6 months of treatment in both groups. CONCLUSION Dyslipidemia aggravates after 6 months of hemodialysis but not after 6 months of peritoneal dialysis. During this period, no net effects on oxidative stress were demonstrated.
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Affiliation(s)
- Sabine H A Diepeveen
- Department of Internal Medicine, Isala Clinics, location Weezenlanden, Zwolle, The Netherlands.
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Czupryniak A, Nowicki M, Chwatko G, Jander A, Bald E. Peritoneal clearance of homocysteine with icodextrin or standard glucose solution exchange. Nephrology (Carlton) 2005; 10:571-5. [PMID: 16354239 DOI: 10.1111/j.1440-1797.2005.00483.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND The aim of the study was to assess plasma homocysteine concentration in peritoneal dialysis patients, and to compare the effect of different peritoneal solutions (glucose-based and icodextrin-based) on peritoneal clearance of homocysteine. METHODS The study group comprised 10 chronic peritoneal dialysis patients; the control group comprised 15 healthy, age-matched non-obese subjects with normal renal function. Patients with vitamin B(12) or folate deficiency were excluded. In all subjects, plasma homocysteine and dialysis adequacy parameters were assessed at baseline. The clearance study was carried out with 2.27% glucose and 7.5% icodextrin solutions (12-h dwell time). RESULTS Mean dialysate concentration of homocysteine was similar for both glucose and icodextrin solutions (8.3 +/- 3.2 and 8.4 +/- 1.9 micromol/L, respectively), but homocysteine clearance was significantly higher for icodextrin than glucose solution (1.82 +/- 0.57 vs 1.39 +/- 0.53 mL/min per 1.73 m(2)P = 0.01). Net ultrafiltration after icodextrin solution was also higher than after glucose solution (599 +/- 136 mL vs 134 +/- 337 mL, P < 0.01). A correlation between total plasma level of homocysteine and its peritoneal clearance was found (r = 0.69; P = 0.03). CONCLUSION It appears that peritoneal elimination of homocysteine depends primarily on its plasma concentration. Icodextrin-based solution for peritoneal dialysis seems to be more efficient in homocysteine elimination than a standard glucose-based solution.
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Affiliation(s)
- Aneta Czupryniak
- Department of Nephrology and Dialysis, Polish Mother's Memorial Hospital Research Institute, Lódz, Poland
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