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Metabolic Regulation of Pre- and Postnatal Growth

机译:前期和产后生长的代谢调节

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Growth characteristics during periods of early developmental plasticity are linked with later health outcomes and with disease risks. Infant growth is modulated by genetic and exogenous factors including nutrition. We try to explore their underlying mechanisms using targeted metabolomic profiling of small molecules in biological samples using high-performance liquid chromatography (LC) coupled to tandem mass spectrometry (MS/MS) to quantify hundreds of molecules in small biosamples, e.g., 50 uL plasma. In the large German LISA birth cohort study, cord blood lysophosphatidylcholines and fatty acids were closely associated with infant birth weight, with a nonsignificant trend towards an association with infant weight gain and later BMI. Studies in infants randomized to different protein intakes in the European CHOP Study show conventional high protein intakes to markedly increase plasma-indispensable amino acids (AA), particularly branched-chain AA (BCAA), while exceeding the infant's capacity of BCAA breakdown, and an increase in the dispensable AA tyrosine previously associated with insulin resistance. In a path model analysis of the relationship of infant plasma AA, growth factors, and infant growth, AA were generally found to induce a stronger response of insulin than IGF-I although effects of individual AA were very different. We conclude that targeted improvement in nutrient supply in pregnancy and infancy may offer large opportunities for promoting desirable child growth patterns and long-term health.
机译:在早期发育可塑性的时期生长特性与后来的健康结果和与疾病风险相关。婴儿生长受遗传和外源性因素,包括营养调制。我们尝试探索使用生物样品中的小分子靶向代谢物组学分析使用耦合到串联质谱(MS / MS)来量化数百分子在小生物样品,例如高效液相色谱法(LC)它们的底层机制,50μL的血浆。在德国大型LISA出生队列研究,脐带血溶血磷脂酰胆碱和脂肪酸紧密地与婴儿出生体重相关,对与婴儿体重增加后来BMI协会一个显着的趋势。在欧洲CHOP研究中随机分配到不同的蛋白质摄入婴儿的研究表明传统的高蛋白质摄入显着地增加等离子体必需氨基酸(AA),特别是支链AA(BCAA),而超过BCAA击穿的婴儿的能力,以及增加在先前与胰岛素抵抗相关的可有可无AA酪氨酸。在婴儿血浆AA,生长因子,和婴儿生长的关系的路径模型分析,AA普遍发现诱导胰岛素的比IGF-I尽管单独的AA的效果有很大不同更强的响应。我们得出结论,在怀孕和婴儿的营养供应,有针对性的改进可以促进孩子理想的增长模式和长期的健康提供了大量的机会。

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