期刊论文详细信息
Lipids in Health and Disease
Imbalance in superoxide dismutase/thioredoxin reductase activities in hypercholesterolemic subjects: relationship with low density lipoprotein oxidation
Tatiana Emanuelli2  Marta Medeiros Frescura Duarte1  Juliana Tanara Vicentini2  Greicy Michelle Marafiga Conterato2  Sabrina Somacal2  Andréia Quatrin2  Amanda Roggia Ruviaro2  Paula Rossini Augusti3 
[1] Departament of Health Sciences, Lutheran University of Brazil, Santa Maria, RS, Brazil;Department of Food Technology and Science, Integrated Center for Laboratory Analysis Development (NIDAL), Center of Rural Sciences, Federal University of Santa Maria, Santa Maria, RS, Brazil;Campus Itaqui, Federal University of Pampa, Itaqui, RS, Brazil
关键词: Thioredoxin reductase;    Superoxide dismutase;    Oxidized low density lipoprotein;    Hypercholesterolemia;    Atherogenic index;   
Others  :  1160269
DOI  :  10.1186/1476-511X-11-79
 received in 2012-04-24, accepted in 2012-06-09,  发布年份 2012
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【 摘 要 】

Background

There is a relationship among hypercholesterolemia, oxidative stress and inflammation in the atherogenesis. Thus, the objective of the present study was to assess paraoxonase (PON1), superoxide dismutase (SOD) and thioredoxin reductase (TrxR-1) activities and their relationship with lipids, oxidative stress and inflammation in subjects with different low density lipoprotein-cholesterol (LDL) levels.

Methods

Serum lipids, highly sensitive C-reactive protein (hs-CRP), lipid and protein oxidation, oxidized LDL (LDLox) and LDLox autoantibodies (LDLoxAB) levels and enzymes activities were measured in a total of 116 subjects that were divided into the following groups according to their LDL levels: low-LDL group (LDL < 100 mg/dL, n = 23), intermediate-LDL group (LDL 100–160 mg/dL, n = 50) and high-LDL group (LDL > 160 mg/dL, n = 43).

Results

The LDLox and hs-CRP levels increased in the high-LDL group (2.7- and 3.7- fold, respectively), whereas the intermediate and high-LDL groups had higher LDLoxAB (2.2- and 3.1-fold) when compared to low-LDL group (p < 0.05). Similarly, SOD activity, the atherogenic index (AI) and protein oxidation were also higher in the intermediate (1.3-, 1.3- and 1.2-fold) and high-LDL (1.6-, 2.3- and 1.6-fold) groups when compared to the low-LDL group (p < 0.05). Lipid oxidation and SOD/TrxR-1 ratio increased only in the high-LDL group (1.3- and 1.6-fold) when compared to the low-LDL group (p < 0.05). The SOD/TrxR-1 ratio was positively correlated to TBARS (r = 0.23, p < 0.05), LDLox (r = 0.18, p < 0.05), LDLoxAB (r = 0.21, p < 0.05), LDL (r = 0.19, p < 0.05) and AI (r = 0.22, p < 0.05). PON1 and TrxR-1 activities were similar among groups.

Conclusions

Some oxidative events initiate when LDL levels are clinically acceptable. Moreover, hypercholesterolemic patients have an imbalance in SOD and TrxR-1 activities that is positively associated to LDL oxidation.

【 授权许可】

   
2012 Augusti et al.; licensee BioMed Central Ltd.

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