W density lipoproteins (VLDL, 5 to 12 ) [30]. LDL-GSK -3203591 web cholesterol is implicated in the genesis of atherosclerosis, while HDL-cholesterol facilitates the elimination of excess lipids from cells to liver; high LDL-cholesterol or low HDL cholesterol is associated with coronary heart disease [31]. This study showed statistically significant (p,0.05) lower mean values of TC, HDLC and LDLC in HIV-infected patients compared to serologically negative controls even though their mean ages and sex distribution were somewhat different (Table 1). Age is a major factor in the amount of cholesterol in blood for men older than 45 years and women older than 55 years [32]. Raisonnier and al. [33] showed in healthy Cameroonians that HDLC concentration varied with gender but not with age. Our present study showed no significant effect of age on the biochemical markers analyzed (data not shown). Thus, it is likely that the increased oxidative stress and lipid peroxidation observed Table 5. Comparison of different biochemical parameters between patients and controls.Parameters TC (g/l) LDLC (g/l) HDLC (mg/dl) TAA (mM) MDA (mM) LPIControls D 1.9660.54 0. 6760. 46 105. 51628. 10 0. 6360. 17 0. 2060. 07 0. 3460.Patients D 1. 1260. 48 0. 4360. 36 46. 54623. 36 0. 1660. 16 0. 4160. 10 26. 02674.P 0.0001 0.0002 0.0001 0.0001 0.0002 0.Every value is the 16985061 mean 6 standard deviation. SD = Standard deviation. doi:10.1371/journal.pone.0065126.tin our study is directly due to HIV infection or viral-induced lipodystrophy, as lipodystrophy in HIV infection is associated with dyslipidemia [34,35]. Our data are in agreement with previous studies that showed lower TC, LDLC and HDLC in HIV-1 infected patients [36], and demonstrated that HIV-induced dyslipidemia was associated with lower HDLC and LDLC [37]. TAA was evaluated using the FRAP test which expresses the antioxidant potential of the organism. It measures its capacity to neutralize through antioxidant molecules the oxidant (free radicals) damage on various substrates (proteins, lipids, carbohydrates, nucleic acids). Our results showed about a threefold reduction of TAA LY2409021 biological activity plasma concentration in patients compared to controls. This may be linked to the 23148522 high level of free radicals production due to the antigenic (virus) activation of lymphocytes, phagocytes and chronic inflammatory processes induced by viral replication [38]. The reactive oxygen species (2OH, HO., O22, H2O2) produced during chronic inflammation react with antioxidants and contribute to the reduction of their plasma concentration [13]. This results in the antioxidant/pro-oxidant balance altered in favor of pro-oxidant; which leads to severe lipids peroxidation and cells apoptosis as reflected by the high concentration of MDA in HIV-infected patients (our results and refs [39,13]). Chronic inflammation in HIV infection increase free radicals formation; these free radicals induce lipid peroxidation which leads to MDA formation [40]. Our results also showed high plasma MDA concentration in patients compared to controls (Table 7); these results are in agreement with those reported by Djinhi and collaborators [41]. The high plasma MDA concentrations we report here are probably the consequence of the effects of free radicals on polyunsaturated lipids which induce oxidative stress, and produces destructive effects such as cells apoptosis, a major cause of CD4 cell depletion during HIV infection, particularly in the early stage of the infection [39,42]. We established a.W density lipoproteins (VLDL, 5 to 12 ) [30]. LDL-cholesterol is implicated in the genesis of atherosclerosis, while HDL-cholesterol facilitates the elimination of excess lipids from cells to liver; high LDL-cholesterol or low HDL cholesterol is associated with coronary heart disease [31]. This study showed statistically significant (p,0.05) lower mean values of TC, HDLC and LDLC in HIV-infected patients compared to serologically negative controls even though their mean ages and sex distribution were somewhat different (Table 1). Age is a major factor in the amount of cholesterol in blood for men older than 45 years and women older than 55 years [32]. Raisonnier and al. [33] showed in healthy Cameroonians that HDLC concentration varied with gender but not with age. Our present study showed no significant effect of age on the biochemical markers analyzed (data not shown). Thus, it is likely that the increased oxidative stress and lipid peroxidation observed Table 5. Comparison of different biochemical parameters between patients and controls.Parameters TC (g/l) LDLC (g/l) HDLC (mg/dl) TAA (mM) MDA (mM) LPIControls D 1.9660.54 0. 6760. 46 105. 51628. 10 0. 6360. 17 0. 2060. 07 0. 3460.Patients D 1. 1260. 48 0. 4360. 36 46. 54623. 36 0. 1660. 16 0. 4160. 10 26. 02674.P 0.0001 0.0002 0.0001 0.0001 0.0002 0.Every value is the 16985061 mean 6 standard deviation. SD = Standard deviation. doi:10.1371/journal.pone.0065126.tin our study is directly due to HIV infection or viral-induced lipodystrophy, as lipodystrophy in HIV infection is associated with dyslipidemia [34,35]. Our data are in agreement with previous studies that showed lower TC, LDLC and HDLC in HIV-1 infected patients [36], and demonstrated that HIV-induced dyslipidemia was associated with lower HDLC and LDLC [37]. TAA was evaluated using the FRAP test which expresses the antioxidant potential of the organism. It measures its capacity to neutralize through antioxidant molecules the oxidant (free radicals) damage on various substrates (proteins, lipids, carbohydrates, nucleic acids). Our results showed about a threefold reduction of TAA plasma concentration in patients compared to controls. This may be linked to the 23148522 high level of free radicals production due to the antigenic (virus) activation of lymphocytes, phagocytes and chronic inflammatory processes induced by viral replication [38]. The reactive oxygen species (2OH, HO., O22, H2O2) produced during chronic inflammation react with antioxidants and contribute to the reduction of their plasma concentration [13]. This results in the antioxidant/pro-oxidant balance altered in favor of pro-oxidant; which leads to severe lipids peroxidation and cells apoptosis as reflected by the high concentration of MDA in HIV-infected patients (our results and refs [39,13]). Chronic inflammation in HIV infection increase free radicals formation; these free radicals induce lipid peroxidation which leads to MDA formation [40]. Our results also showed high plasma MDA concentration in patients compared to controls (Table 7); these results are in agreement with those reported by Djinhi and collaborators [41]. The high plasma MDA concentrations we report here are probably the consequence of the effects of free radicals on polyunsaturated lipids which induce oxidative stress, and produces destructive effects such as cells apoptosis, a major cause of CD4 cell depletion during HIV infection, particularly in the early stage of the infection [39,42]. We established a.
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