Abstract
We investigated the association between the degree of oxidative modification of LDL particles by non-linear optical response of LDL (Z-scan technique) and the presence of subclinical atherosclerosis in different segments of the carotid artery. We recruited high-intensity athlete runners (n = 44) and controls (n = 51) to participate in the study. The carotid intima-media thickness (cIMT), interleukin 10 (IL-10), TNF-alpha, and the non-linear optical responses of LDL particle (Z-scan) were assessed. In athletes, the mean cIMT differed between genders, with higher values observed in female athletes compared to male athletes (P < 0.05). Higher mean values for cIMT were seen in the right carotid arteries of female athletes as compared to female controls (P < 0.05). Higher levels of TNF-alpha and IL-10 were found in athletes (P < 0.05). Yet, ΔΓpv (transmittance curve) of Z-scan in athletes was higher than in the non-athletes, indicating less oxidation in LDL particles of athletes (P < 0.05). There was an inverse association between the ΔΓpv and cIMT in the right internal carotid segments (β = −0.163, P < 0.05) in all subjects, and between the VO2max and the mean cIMT (β = −0.003, P < 0.05) in male subjects. The present study shows that the Z-scan technique enabled to detect less oxidative modifications in LDL particles from athletes. This effect was associated with cIMT in a gender-dependent mode.
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This study was funded in part by a research grant from the National Institute for Science and Technology in Complex Fluids (INCT-FCx). Henrique Fonseca has received a research grant from CNPq (Brazilian Council for Scientific and Technological Development).
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Henrique Andrade R. Fonseca and Célia R. Bittencourt equally contributed to this manuscript and should be considered as first authors.
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Fonseca, H.A.R., Bittencourt, C.R., Fonseca, F.A. et al. Non-linear Optical Responses of Low-Density Lipoprotein are Associated with Intima-Media Thickness of Carotid Artery in Athletes. Cell Biochem Biophys 74, 253–262 (2016). https://doi.org/10.1007/s12013-016-0720-2
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DOI: https://doi.org/10.1007/s12013-016-0720-2