The reduction of cholesteryl linoleate in lipoproteins: an index of clinical severity in β-thalassemia/Hb E
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Rataya Luechapudiporn
Abstract
Background: Oxidative modification of lipoproteins has been reported in β-thalassemia and has been suggested to relate to atherogenesis-risk. This study focused on the change in cholesteryl esters in plasma lipoproteins under oxidative stress resulting from iron overload in β-thalassemia/hemoglobin E (β-thal/Hb E) patients.
Methods: Markers of oxidative damage and cholesteryl esters (CEs) were measured in plasma and lipo-proteins from 30 β-thal/Hb E patients and compared to those from 10 healthy volunteers. CEs in plasma, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) were separated and identified using HPLC.
Results: β-Thal/Hb E patients presented iron overload, a precipitous decrease in α-tocopherol and increased lipid peroxidation (thiobarbituric acid-reactive substances; TBARs) in both plasma and lipoproteins. Cholesteryl linoleate, the most abundant CE in lipoproteins, showed a reduction of 70% in LDL, while other CEs showed a lower reduction (50%). An inverse relationship between the cholesteryl linoleate/cholesteryl oleate ratio (CL/CO) and the degree of clinical severity suggested that the CL/CO ratio is an index of damaged lipoproteins and could be used as a pathologic marker of underlying iron overload. Good correlation of non-transferrin-bound iron (NTBI) and TBARs (r=0.8, p<0.01) in LDL strongly supported the contention that iron overload is responsible for initiating the lipid peroxidation in β-thal/Hb E.
Conclusions: This study suggests that cholesteryl linoleate is the primary target of oxidative modification induced by NTBI in β-thal/Hb E patients and that reduction in cholesteryl linoleate in lipoproteins could be used as a severity index for β-thal/Hb E.
References
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©2006 by Walter de Gruyter Berlin New York
Articles in the same Issue
- CCLM: Expanding the science worldwide
- Factor V Leiden, prothrombin G20210A substitution and hormone therapy: indications for molecular screening
- Immunochemical quantification of free immunoglobulin light chains from an analytical perspective
- De novo deletion removes a conserved motif in the C-terminus of ABCA4 and results in cone-rod dystrophy
- Molecular detection of squamous cell carcinoma antigen transcripts in peripheral blood of cancer patients
- Influence of human haptoglobin polymorphism on oxidative stress induced by free hemoglobin on red blood cells
- Real-time RT-PCR quantification of PRAME gene expression for monitoring minimal residual disease in acute myeloblastic leukaemia
- Association of high-sensitive C-reactive protein with advanced stage β-cell dysfunction and insulin resistance in patients with type 2 diabetes mellitus
- A longitudinal evaluation of urinary glycosaminoglycan excretion in normoalbuminuric type 1 diabetic patients
- National survey on the execution of the oral glucose tolerance test (OGTT) in a representative cohort of Italian laboratories
- The reduction of cholesteryl linoleate in lipoproteins: an index of clinical severity in β-thalassemia/Hb E
- Alterations in serum glycosaminoglycan profiles in Graves' patients
- Alterations in anti-oxidative defence enzymes in erythrocytes from sporadic amyotrophic lateral sclerosis (SALS) and familial ALS patients
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- The effects of adrenocorticotrophic hormone and cortisol on homocysteine and vitamin B concentrations
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- Cut-off values for total serum immunoglobulin E between non-atopic and atopic children in north-west Croatia
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Articles in the same Issue
- CCLM: Expanding the science worldwide
- Factor V Leiden, prothrombin G20210A substitution and hormone therapy: indications for molecular screening
- Immunochemical quantification of free immunoglobulin light chains from an analytical perspective
- De novo deletion removes a conserved motif in the C-terminus of ABCA4 and results in cone-rod dystrophy
- Molecular detection of squamous cell carcinoma antigen transcripts in peripheral blood of cancer patients
- Influence of human haptoglobin polymorphism on oxidative stress induced by free hemoglobin on red blood cells
- Real-time RT-PCR quantification of PRAME gene expression for monitoring minimal residual disease in acute myeloblastic leukaemia
- Association of high-sensitive C-reactive protein with advanced stage β-cell dysfunction and insulin resistance in patients with type 2 diabetes mellitus
- A longitudinal evaluation of urinary glycosaminoglycan excretion in normoalbuminuric type 1 diabetic patients
- National survey on the execution of the oral glucose tolerance test (OGTT) in a representative cohort of Italian laboratories
- The reduction of cholesteryl linoleate in lipoproteins: an index of clinical severity in β-thalassemia/Hb E
- Alterations in serum glycosaminoglycan profiles in Graves' patients
- Alterations in anti-oxidative defence enzymes in erythrocytes from sporadic amyotrophic lateral sclerosis (SALS) and familial ALS patients
- Sandwich ELISAs for soluble immunoglobulin superfamily receptor translocation-associated 2 (IRTA2)/FcRH5 (CD307) proteins in human sera
- Utilizing ultrafiltration to remove alkaline phosphatase from clinical analyzer water
- Measurement of serum monoclonal components: comparison between densitometry and capillary zone electrophoresis
- Salivary aspartate aminotransferase, alanine aminotransferase and alkaline phosphatase: possible markers in periodontal diseases?
- Reticulocyte count, mean reticulocyte volume, immature reticulocyte fraction, and mean sphered cell volume in elite athletes: reference values and comparison with the general population
- Serum homocysteine levels and paraoxonase 1 activity in preschool aged children in Greece
- The effects of adrenocorticotrophic hormone and cortisol on homocysteine and vitamin B concentrations
- Plasma, salivary and urinary cotinine in non-smoker Italian women exposed and unexposed to environmental tobacco smoking (SEASD study)
- Cut-off values for total serum immunoglobulin E between non-atopic and atopic children in north-west Croatia
- Thyroglobulin assay during thyroxine treatment in low-risk differentiated thyroid cancer management: comparison with recombinant human thyrotropin-stimulated assay and imaging procedures
- Evaluation of serum levels of p53 in hepatocellular carcinoma in Egypt
- Insufficient filling of vacuum tubes as a cause of microhemolysis and elevated serum lactate dehydrogenase levels. Use of a data-mining technique in evaluation of questionable laboratory test results
- Evaluation of three different specimen types (serum, plasma lithium heparin and serum gel separator) for analysis of certain analytes: clinical significance of differences in results and efficiency in use
- Comparative evaluation of a new immunoradiometric assay for corticotropin
- Mast cells in atherosclerosis as a source of the cytokine RANKL
- Falsely increased total serum protein due to dextran interference
