Triacylglycerol molecular weight and to a lesser extent, fatty acid positional distribution, affect chylomicron triacylglycerol composition in women.

Triacylglycerol molecular weight and to a lesser extent, fatty acid positional distribution, affect chylomicron triacylglycerol composition in women.
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三酰甘油分子量和脂肪酸位置分布在较小程度上影响女性乳糜微粒三酰甘油的组成。

DOI:
10.1093/jn/132.5.924
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发表时间:
2002
期刊:
The Journal of nutrition
影响因子:
--
通讯作者:
H. Kallio
H. Kallio
中科院分区:
--
文献类型:
--
作者:
K. Yli;U. Schwab;R. Tahvonen;J. Kurvinen;H. Mykkänen;H. Kallio

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乳糜微粒三酰甘油(TAG)的餐后组成及其清除率可能受到TAG分子量、其脂肪酸(FA)组合和FA在TAG中的位置分布的影响。餐后TAG清除延迟是心血管疾病的危险因素。然而,由于传统分析方法的复杂性,单个TAG分子的组成经常被忽视。在这项研究中,乳糜微粒TAG分子量分布和区域异构体后,在10名健康女性志愿者两个脂肪负荷相同的FA组成,但不同的位置分布(棕榈油和酯交换棕榈油)。采用高效串联质谱分析方法。在6 h的观察期内,48:2 [48个酰基碳和2个双键(ACN:DB)]、50:3和50:2的TAG的相对浓度降低,而48:0(三棕榈酸甘油酯)、52:3和54:4的比例保持不变,54:3(三油酸甘油酯)的比例增加(P < 0.05)。研究了棕榈酸、油酸和亚油酸在不同sn位置上的7种区域异构体的存在。1,3-二棕榈酰-2-油酰-sn-甘油的量在食用棕榈油后1.5 h比食用棕榈油后2-5 h少(P <0.05),在食用棕榈油后1.5 h比食用棕榈油后2-6 h少(P < 0.05)。这可能是肠道中棕榈酸损失的指示。总之,TAG分子量组成和较小程度上的位置分布似乎影响人类乳糜微粒TAG清除率。
Postprandial composition of chylomicron triacylglycerols (TAG) and their clearance may be affected by the molecular weight of TAG, their fatty acid (FA) combinations and the positional distribution of FA in TAG. Delayed postprandial TAG clearance is a risk factor for cardiovascular disease. However, due to the complexity of traditional analysis methods, the composition of individual TAG molecules is frequently overlooked. In this study, chylomicron TAG molecular weight distribution and regioisomerism were followed in 10 healthy female volunteers after two fat loads with identical FA composition but different positional distributions (palm oil and transesterified palm oil). An efficient tandem mass spectrometric method of analysis was applied. During the 6-h observation period, the relative concentrations of TAG with 48:2 [48 acyl carbons and 2 double bonds (ACN:DB)], 50:3 and 50:2 decreased, whereas the proportions of 48:0 (tripalmitin), 52:3 and 54:4 remained constant and the proportion of 54:3 (triolein) increased (P < 0.05). The existence of seven regioisomers containing palmitic, oleic and linoleic acids in different sn-positions was studied. The amount of 1,3-dipalmitoyl-2-oleoyl-sn-glycerol was less (P < 0.05) 1.5 h postprandially than at 2-5 h after palm oil, and less (P < 0.05) at 1.5 h than at 2-6 h after transesterified palm oil. This may be an indication of a loss of palmitic acid in the gut. Taken together, TAG molecular weight composition and to a lesser extent, positional distribution, seem to affect the rates of chylomicron TAG clearance in humans.
DOI: 10.1016/s0021-9258(17)47247-4
发表时间: 1984-07
期刊: The Journal of biological chemistry
影响因子: --
作者:
N. Abumrad;Jane H. Park;Charles R. Park
通讯作者: N. Abumrad;Jane H. Park;Charles R. Park
三酰基-sn-甘油结构对大鼠乳糜微粒和富含三酰基甘油的乳剂代谢的影响。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Redgrave,TG;Kodali,DR;Small,DM
通讯作者: Small,DM
正常人中棕榈酸视黄酯标记对乳糜微粒残留清除的表征。
DOI: --
发表时间: 1992
影响因子: 6.5
作者:
Berr,F
通讯作者: Berr,F
DOI: 10.1016/0005-2760(82)90359-9
发表时间: 1982
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Patton,JS;Rigler,MW;Liao,TH;Hamosh,P;Hamosh,M
通讯作者: Hamosh,M