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Moustafa I, Connolly C, Anis M, Mustafa H, Oosthuizen F, Viljoen M. A prospective study to evaluate the efficacy and safety of vitamin E and levocarnitine prophylaxis against doxorubicin-induced cardiotoxicity in adult breast cancer patients. J Oncol Pharm Pract 2024; 30:354-366. [PMID: 37157803 DOI: 10.1177/10781552231171114] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
BACKGROUND Doxorubicin induces acute and chronic cardiotoxicity. This study is aimed to evaluate the efficacy and safety of vitamin E and levocarnitine (EL) as cardioprotective agents against acute doxorubicin cardiotoxicity in female adult breast cancer patients. METHODS A prospective, randomized controlled study was conducted in patients treated with doxorubicin and cyclophosphamide (AC). Patients were randomly assigned to EL plus AC or AC alone for the duration of 4 cycles. Cardiac enzymes (B-type natriuretic peptide, creatine kinase, troponin I (Trop)) and cardiac events were monitored during treatment to evaluate the cardioprotective efficacy of EL. RESULTS Seventy-four patients were recruited and received four cycles of chemotherapy. The intervention group (n = 35) showed a significant reduction in both the B-type natriuretic peptide and creatine kinase cardiac enzymes compared to the control group (n = 39). The median (IQR) change for BNP was 0.80 (0.00-4.00) for IG versus 1.80 (0.40-3.60) for CG groups (p < 0.001); creatine kinase was -0.08 (-0.25-0.05) for IG versus 0.20 (0.05-0.50) for CG (p < 0.001). The addition of EL decreased the cardiac events by 24.2% (p = 0.02). All adverse events were tolerable and manageable. CONCLUSION This study supports the addition of EL as prophylaxis against acute doxorubicin cardiotoxicity and it was also very well tolerated by a majority of the patients. The co-administration of EL at higher doxorubicin (240 mg/m2) dose should be further investigated.
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Affiliation(s)
- Iman Moustafa
- Department of Pharmacology, School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
- Department of Pharmacy, King Abdulaziz Hospital, Ministry of the National Guard - Health Affairs, Al-Ahsa, Saudi Arabia
- King Abdullah International Medical Research Center, Al-Ahsa, Saudi Arabia
| | - Catherine Connolly
- Department of Pharmacology, School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Malik Anis
- Department of Pharmacy, King Abdulaziz Hospital, Ministry of the National Guard - Health Affairs, Al-Ahsa, Saudi Arabia
| | - Hani Mustafa
- Department of Pharmacy, King Abdulaziz Hospital, Ministry of the National Guard - Health Affairs, Al-Ahsa, Saudi Arabia
| | - Frasia Oosthuizen
- Department of Pharmacology, School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Michelle Viljoen
- Department of Pharmacology, School of Pharmacy, University of the Western Cape, Bellville, South Africa
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Alhusaini AM, Alhumaidan SA, Alharbi GM, Alzahrani EA, Sarawi WS, Alomar HA, Alanazi AM, Mattar DS, Hasan IH. Cross-Regulation between Autophagy and Apoptosis Induced by Vitamin E and Lactobacillus Plantarum through Beclin-1 Network. Int J Mol Sci 2022; 23:ijms232315305. [PMID: 36499631 PMCID: PMC9736033 DOI: 10.3390/ijms232315305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/30/2022] [Accepted: 12/03/2022] [Indexed: 12/12/2022] Open
Abstract
Autophagy and apoptosis are two important regulatory mechanisms for how the body can respond to diseases. This study was designed to investigate the protective actions of vitamin E (Vit-E) and lactobacillus plantarum (Lac-B) against mercuric chloride (HgCl2)-induced kidney injury. Thirty albino rats were divided into five groups: group 1 served as the normal group; rats in group 2 received high doses of HgCl2; rats in groups 3, 4 and 5 were given Vit-E, Lac-B and the combination of Vit-E and Lac-B, respectively along with HgCl2 for two weeks. HgCl2 provoked renal injury, manifested by elevation in serum urea, urea nitrogen and creatinine. Kidney levels of oxidative stress and inflammation were markedly increased post HgCl2 administration. Moreover, HgCl2 significantly elevated the gene expression levels of VCAM-1 and cystatin C, while podocin was downregulated. Additionally, it markedly decreased the protein expression of Beclin-1 and Bcl-2. Histopathological examination revealed massive degeneration with congested blood vessels following HgCl2 administration. Treatment with Vit-E or/and Lac-B restored the normal levels of the previously mentioned parameters, as well as improved the morphology of kidney tissues. Both Vit-E and Lac-B provided a protective effect against HgCl2-induced kidney damage by regulating autophagy and apoptosis.
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Affiliation(s)
- Ahlam M. Alhusaini
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
- Correspondence: (A.M.A.); (I.H.H.)
| | - Sara A. Alhumaidan
- College of Pharmacy, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Ghaida M. Alharbi
- College of Pharmacy, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Eman A. Alzahrani
- College of Pharmacy, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Wedad S. Sarawi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Hatun A. Alomar
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Abeer M. Alanazi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Dareen S. Mattar
- Department of Physiology, College of Medicine, Umm Al Qura University, P.O. Box 715, Makkah 21955, Saudi Arabia
| | - Iman H. Hasan
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
- Correspondence: (A.M.A.); (I.H.H.)
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Karslioglu Í, Ertekin MV, Koçer Í, Taysi S, Sezen O, Gepdiremen A, Balci E. Protective Role of Intramuscularly Administered Vitamin E on the Levels of Lipid Peroxidation and the Activities of Antioxidant Enzymes in the Lens of Rats Made Cataractous with Gamma-Irradiation. Eur J Ophthalmol 2018. [DOI: 10.1177/112067210401400606] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Í. Karslioglu
- Department of Radiation Oncology, Faculty of Medicine, Atatürk University, Erzurum - Turkey
| | - M. Vecdi Ertekin
- Department of Radiation Oncology, Faculty of Medicine, Atatürk University, Erzurum - Turkey
| | - Í. Koçer
- Department of Ophthalmology, Faculty of Medicine, Atatürk University, Erzurum - Turkey
| | - S. Taysi
- Department of Biochemistry, Faculty of Medicine, Atatürk University, Erzurum - Turkey
| | - O. Sezen
- Department of Radiation Oncology, Faculty of Medicine, Atatürk University, Erzurum - Turkey
| | - A. Gepdiremen
- Department of Pharmacology, Faculty of Medicine, Atatürk University, Erzurum - Turkey
| | - E. Balci
- Department of Radiation Oncology, Faculty of Medicine, Atatürk University, Erzurum - Turkey
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4
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Darwish MA, Abo-Youssef AM, Khalaf MM, Abo-Saif AA, Saleh IG, Abdelghany TM. Vitamin E mitigates cisplatin-induced nephrotoxicity due to reversal of oxidative/nitrosative stress, suppression of inflammation and reduction of total renal platinum accumulation. J Biochem Mol Toxicol 2016; 31:1-9. [DOI: 10.1002/jbt.21833] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 07/16/2016] [Accepted: 07/21/2016] [Indexed: 01/29/2023]
Affiliation(s)
- Mostafa A. Darwish
- Department of Pharmacology and Toxicology, Faculty of Pharmacy; Nahda University; Beni-Suef Egypt
| | - Amira M. Abo-Youssef
- Department of Pharmacology and Toxicology, Faculty of Pharmacy; Beni-Suef University; Beni-Suef Egypt
| | - Marwa M. Khalaf
- Department of Pharmacology and Toxicology, Faculty of Pharmacy; Beni-Suef University; Beni-Suef Egypt
| | - Ali A. Abo-Saif
- Department of Pharmacology and Toxicology, Faculty of Pharmacy; Nahda University; Beni-Suef Egypt
| | - Ibrahim G. Saleh
- Department of Pharmacology and Toxicology, Faculty of Pharmacy; Al-Azhar University; Cairo Egypt
| | - Tamer M. Abdelghany
- Department of Pharmacology and Toxicology, Faculty of Pharmacy; Al-Azhar University; Cairo Egypt
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5
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Mandracchia D, Trapani A, Chlapanidas T, Trapani G, Tripodo G. Enzyme controlled release of celecoxib from inulin based nanomicelles. ACTA ACUST UNITED AC 2015. [DOI: 10.3233/jcb-15010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Delia Mandracchia
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, Bari, Italy
| | - Adriana Trapani
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, Bari, Italy
| | | | - Giuseppe Trapani
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, Bari, Italy
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6
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Tripodo G, Pasut G, Trapani A, Mero A, Lasorsa FM, Chlapanidas T, Trapani G, Mandracchia D. Inulin-d-α-Tocopherol Succinate (INVITE) Nanomicelles as a Platform for Effective Intravenous Administration of Curcumin. Biomacromolecules 2015; 16:550-7. [DOI: 10.1021/bm501616e] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Giuseppe Tripodo
- Department
of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Gianfranco Pasut
- Department
of Pharmaceutical and Pharmacological Sciences, University of Padova, Via F. Marzolo 5, 35131 Padova, Italy
| | - Adriana Trapani
- Department
of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, Via Orabona 4, 70125 Bari, Italy
| | - Anna Mero
- Department
of Pharmaceutical and Pharmacological Sciences, University of Padova, Via F. Marzolo 5, 35131 Padova, Italy
| | | | - Theodora Chlapanidas
- Department
of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Giuseppe Trapani
- Department
of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, Via Orabona 4, 70125 Bari, Italy
| | - Delia Mandracchia
- Department
of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, Via Orabona 4, 70125 Bari, Italy
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Amphiphilic inulin-d-α-tocopherol succinate (INVITE) bioconjugates for biomedical applications. Carbohydr Polym 2014; 103:46-54. [DOI: 10.1016/j.carbpol.2013.11.056] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 11/25/2013] [Accepted: 11/27/2013] [Indexed: 11/22/2022]
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8
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Singh RB, Khanna HK, Niaz MA. Randomized, Double-blind Placebo-controlled Trial of Coenzyme Q10 in Chronic Renal Failure: Discovery of a New Role. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13590840020013266] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Dávila-Esqueda ME, Vertiz-Hernández AA, Martínez-Morales F. Comparative Analysis of the Renoprotective Effects of Pentoxifylline and Vitamin E on Streptozotocin-Induced Diabetes Mellitus. Ren Fail 2009. [DOI: 10.1081/jdi-42728] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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10
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Aktoz T, Aydogdu N, Alagol B, Yalcin O, Huseyinova G, Atakan IH. The protective effects of melatonin and vitamin E against renal ischemia-reperfusion injury in rats. Ren Fail 2007; 29:535-42. [PMID: 17654314 DOI: 10.1080/08860220701391738] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Reactive oxygen species (ROS) were shown to contribute to the cellular damage induced by ischemia-reperfusion. The purpose of this study was to investigate and compare the efficiency of melatonin and vitamin E in the reduction of injury induced by ROS in a rat model of renal ischemia-reperfusion. Twenty-four Wistar-albino rats were divided into four groups. Rats in the Sham group were given saline 1 mL/kg, intraperitoneally (ip) 72 h, 48 h, 24 h, and 30 min before the sham operation. Rats in ischemia-reperfusion (IR), IR+Melatonin, and IR+Vitamin E groups were given saline (1 mL/kg), melatonin (10 mg/kg), and vitamin E (100 mg/kg) ip, respectively, 72 h, 48 h, 24 h, and 30 min before the ischemia for 60 min, followed by reperfusion for 60 min. The blood samples and kidney tissues of the rats were taken under anesthesia. Ischemia-reperfusion significantly increased urea, creatinine, and malondialdehyde (MDA) levels, and decreased superoxide dismutase (SOD) and catalase (CAT) activities. Histopathological findings of the IR group confirmed that there was renal impairment by cast formation and tubular necrosis in the tubular epithelium. In the IR+Melatonin group, while MDA levels significantly decreased, SOD activities increased. In the IR+Melatonin group, the level of tubular necrosis and cast formation are significantly decreased than those seen in the ischemia-reperfusion group. Melatonin in particular was effective to reverse hot ischemia of kidney by its antioxidant effects. These results may indicate that melatonin pretreatment protects against functional, biochemical, and morphological damage better than vitamin E in renal ischemia-reperfusion injury.
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Affiliation(s)
- Tevfik Aktoz
- Department of Urology, Trakya University, Faculty of Medicine, Edirne, Turkey
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11
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Kind T, Tolstikov V, Fiehn O, Weiss RH. A comprehensive urinary metabolomic approach for identifying kidney cancerr. Anal Biochem 2007; 363:185-95. [PMID: 17316536 DOI: 10.1016/j.ab.2007.01.028] [Citation(s) in RCA: 330] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Revised: 01/10/2007] [Accepted: 01/20/2007] [Indexed: 12/14/2022]
Abstract
The diagnosis of cancer by examination of the urine has the potential to improve patient outcomes by means of earlier detection. Due to the fact that the urine contains metabolic signatures of many biochemical pathways, this biofluid is ideally suited for metabolomic analysis, especially involving diseases of the kidney and urinary system. In this pilot study, we test three independent analytical techniques for suitability for detection of renal cell carcinoma (RCC) in urine of affected patients. Hydrophilic interaction chromatography (HILIC-LC-MS), reversed-phase ultra performance liquid chromatography (RP-UPLC-MS), and gas chromatography time-of-flight mass spectrometry (GC-TOF-MS) all were used as complementary separation techniques. The combination of these techniques is best suited to cover a very large part of the urine metabolome by enabling the detection of both lipophilic and hydrophilic metabolites present therein. In this study, it is demonstrated that sample pretreatment with urease dramatically alters the metabolome composition apart from removal of urea. Two new freely available peak alignment methods, MZmine and XCMS, are used for peak detection and retention time alignment. The results are analyzed by a feature selection algorithm with subsequent univariate analysis of variance (ANOVA) and a multivariate partial least squares (PLS) approach. From more than 2000 mass spectral features detected in the urine, we identify several significant components that lead to discrimination between RCC patients and controls despite the relatively small sample size. A feature selection process condensed the significant features to less than 30 components in each of the data sets. In future work, these potential biomarkers will be further validated with a larger patient cohort. Such investigation will likely lead to clinically applicable assays for earlier diagnosis of RCC, as well as other malignancies, and thereby improved patient prognosis.
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Affiliation(s)
- Tobias Kind
- Genome Center, University of California, Davis, CA 95616, USA
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12
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Abstract
Administration of vitamin E in children with immunoglobulin A (IgA) nephropathy, focal segmental glomerulosclerosis (FSGS) and type I diabetes demonstrated potential towards ameliorating progression. Oral vitamin E therapy reduced endothelial dysfunction, lipid peroxidation and oxidative stress in patients with chronic kidney failure (CKF). Moreover, the use of vitamin E-bonded hemodialyzers reduced atherosclerotic changes, erythropoietin dosage and muscular cramps in patients on hemodialysis (HD). However, several controlled clinical trials failed to document beneficial effects on the study subjects' cardiovascular and renal outcomes. A recent report of increased all-cause mortality in adult patients receiving high dose vitamin E therapy has caused considerable concern and debate. These issues regarding the efficacy and safety of vitamin E in renal therapeutic regimens will be reviewed in this article.
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Vesey DA, Cheung C, Endre Z, Gobé G, Johnson DW. Role of protein kinase C and oxidative stress in interleukin-1beta-induced human proximal tubule cell injury and fibrogenesis. Nephrology (Carlton) 2005; 10:73-80. [PMID: 15705185 DOI: 10.1111/j.1440-1797.2005.00363.x] [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] [Indexed: 11/30/2022]
Abstract
BACKGROUND Interleukin (IL)-1beta, a pro-inflammatory macrophage-derived cytokine, is implicated as a key mediator of interstitial fibrosis and tubular loss or injury in progressive renal insufficiency. This study investigates some of the mechanisms of action of IL-1beta on the proximal tubule. METHODS Confluent cultures of primary human proximal tubule cells (PTC) were incubated in serum-free media supplemented with either IL-1beta (0-4 ng/mL), phorbol-12-myristate 13-acetate (PMA, protein kinase C activator) (6.25-100 nmol/L), or vehicle (control), together with a non-specific protein kinase C inhibitor (H7), a specific protein kinase C inhibitor (BIM-1), an anti-oxidant (NAC) or a NADPH oxidase inhibitor (AEBSF). RESULTS Interleukin-1beta-treated PTC exhibited time-dependent increases in fibronectin secretion (ELISA), cell injury (LDH release) and reactive nitrogen species (RNS) release (Griess assay). Proximal tubule cell DNA synthesis (thymidine incorporation) was also significantly suppressed. The effects of IL-1beta, which were reproduced by incubation of PTC with PMA (6.25-100 nmol/L), were blocked by H7 but not by BIM-1. The anti-oxidant (4 mmol/L) partially blocked IL-1beta-induced fibronectin secretion by PTC, but did not affect IL-1beta-induced LDH release, RNS release or growth inhibition. The NADPH oxidase inhibitor (AEBSF) significantly attenuated all observed deleterious effects of IL-1beta on PTC. CONCLUSION Interleukin-1beta directly induces proximal tubule injury, extracellular matrix production and impaired growth. The anti-oxidant, NAC, appears to ameliorate part of the fibrogenic effect of IL-1beta on PTC through mechanisms that do not significantly involve protein kinase C activation or nitric oxide release.
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Affiliation(s)
- David A Vesey
- Department of Renal Medicine, University of Queensland at the Princess Alexandra Hospital, Brisban, Queensland, Australia
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Galli F, Floridi AG, Floridi A, Buoncristiani U. Accumulation of vitamin E metabolites in the blood of renal failure patients. Clin Nutr 2004; 23:205-12. [PMID: 15030960 DOI: 10.1016/s0261-5614(03)00128-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2003] [Accepted: 06/25/2003] [Indexed: 12/21/2022]
Abstract
BACKGROUND & AIMS Carboxyethyl-hydroxychromans (CEHC) are hydrosoluble vitamin E metabolites excreted through the renal filter. In this study we investigated the effect of the kidney damage on the blood levels of CEHC. METHODS Plasma levels of alpha-CEHC, gamma-CEHC and their precursors (namely, alpha-tocopherol and gamma-tocopherol) were measured by HPLC with electrochemical detection in chronic (CRF) and end-stage renal failure patients on regular hemodialysis (HD) before and after dialysis. CRF patients (n = 26) were divided into three subgroups with different extent of kidney damage as measured by the intervals of creatinine clearance (CrCl, in ml/min): (a) 2-10, (b) 10-20, and (c) 20-45. HD patients (n = 8) did not show residual renal function. In all the subjects the intake of vitamin E (as alpha-tocopherol) was assessed using a food frequency questionnaire. In the HD group, the plasma concentrations of ascorbic and uric acid (AA and UA, respectively), total thiols, the total antioxidant status (TAS) and reactive carbonyls were also measured. RESULTS The progressive deterioration of the kidney function in the different groups of patients produced an exponential increase of both alpha-CEHC and gamma-CEHC in plasma. Compared with healthy controls (alpha-CEHC = 20.1+/-13.4 and gamma-CEHC = 230.6+/-83.0 nmol/l) the levels of CEHC approximately doubled in patients with CrCl < or = 20ml/min (42.4+/-20.2 and 424.5.5+/-174.4; P <0.05 or higher in both) and reached a 3-fold maximum increase in HD patients (77.3+/-45.7 and 636.6+/-219.3). The hemodialysis provided a significant, but only a transient, correction of CEHC accumulation (44.8+/-23.5, 364.2+/-189.9). The HD patients showed lower intake and levels of vitamin E (alpha-tocopherol = 5.1+/-1.0 and gamma-tocopherol =0.32+/-0.11 micromol/mmol cholesterol; P <0.05) compared to healthy controls (5.8+/-0.8 and 0.43+/-0.14), but in the CRF patients tocopherol levels were normal or only slightly decreased even though approximately half of the subject had lowered vitamin E intake. When the entire patient population was considered, the blood concentrations of parental tocopherols and CEHC did not correlate. The HD patients before dialysis showed a marked decrease of TAS/UA, AA and thiols levels, while UA and free carbonyls significantly increased. After dialysis, the depletion of AA and thiols further worsened and also UA and TAS/UA decreased, but free carbonyls slightly increased. CONCLUSIONS The results other than to confirm the key importance of the renal route for the excretion of CEHC, demonstrate that CEHC cannot be reliably used to investigate vitamin E biokinetics and transformation without a careful examination of the renal function. CEHC accumulation does not seem to influence the antioxidant status in the plasma of HD patients. Further studies are requested to establish whether such an increase in blood CEHC concentrations might be harmful or could contribute to the biological functions of the vitamin E in uremia and dialysis patients.
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Affiliation(s)
- F Galli
- Section of Applied and Clinical Biochemistry, Department of Internal Medicine, University of Perugia, Via del Giochetto, 06126-Perugia, Italy.
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