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  • Title: Hazelnut consumption decreases the susceptibility of LDL to oxidation, plasma oxidized LDL level and increases the ratio of large/small LDL in normolipidemic healthy subjects.
    Author: Yücesan FB, Orem A, Kural BV, Orem C, Turan I.
    Journal: Anadolu Kardiyol Derg; 2010 Feb; 10(1):28-35. PubMed ID: 20150001.
    Abstract:
    OBJECTIVE: Nut consumption has beneficial effects on protection for development of atherosclerotic process. METHODS: Single intervention study design was used to determine the effects of hazelnut-enriched diet (1 g/kg/day) during 4 weeks period on atherogenic tendency of low-density lipoprotein (LDL) by evaluating susceptibility of LDL to oxidation, alpha-tocopherol content of LDL, LDL subfractions, plasma oxidized (ox) LDL, lipid and lipoprotein levels in normolipidemic healthy subjects (n=21). Statistical analysis was performed using paired t test, ANOVA for repeated measurements test, Pearson's and Spearman correlation analyses. RESULTS: Lag time for oxidation (baseline 54.6+/- 12.3 min, 15th day 59.3+/- 13.4 min, 30th day 65.2+/- 17.8 min, p=0.001) and ,alpha--tocopherol content of LDL (baseline 4.82+/- 1.2 microg/mg LDL protein, 15th day 4.88+/- 1.4 microg/mg LDL protein, 30th day 5.35+/- 1.7 microg/mg LDL protein, p=0.02) were found to be increased while ox-LDL levels (baseline 57.2+/- 16.2 U/L, 15th day 51.2+/- 13.6 U/L, 30th day 48.2+/- 14.2 U/L, p=0.001) decreased during the study period. Total cholesterol, LDL-cholesterol, apolipoprotein (apo) B and apo B/apo AI ratio were found to be significantly lower while apo AI was higher (p<0.05). In respect to LDL subfraction, ratio of large/small LDL was significantly increased at the end of the study (baseline 3.79+/- 1.35, 15th day 3.41+/- 1.60, 30th day 4.28+/- 2.44, p= 0.046). CONCLUSION: Hazelnut-enriched diet may play important role in decrease in atherogenic tendency of LDL by lowering the susceptibility of LDL to oxidation and plasma ox-LDL levels, and increasing the ratio of large/small LDL beyond its beneficial effect on lipid and lipoprotein levels.
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