Association of protein intakes and variation of diet-scalp hair nitrogen isotopic discrimination factor in Papua New Guinea Highlanders.
Association of protein intakes and variation of diet-scalp hair nitrogen isotopic discrimination factor in Papua New Guinea Highlanders.
复制标题
巴布亚新几内亚高地人蛋白质摄入量与饮食头皮头发氮同位素辨别因素变化的关系。
DOI：
10.1002/ajpa.22798
复制
发表时间：
2015
影响因子：
2.8
通讯作者：
Umezaki M.
中科院分区：
文献类型：
--
作者：
Naito Y;Morita A;Natsuhara K;Tadokoro K;Baba J;Odani S;Tomitsuka E;Igai K;Tsutaya T;Yoneda M;Greenhill A;Horwood P;Kevin S;Phuanukoonnon S;Siba P;Umezaki M.
目的：研究巴布亚新几内亚高地3个社区居民膳食和头发氮同位素区分因子（Δ 15 N Hair-Diet：δ 15 N Hair- δ 15 N Diet），并分析其蛋白质摄入量和质量。Δ 15 N对于精确评估人类的饮食习惯非常重要;在现代和传统生活方式中。关于影响Δ 15 N值的因素，已经提出了几种假设，主要基于动物饲养实验的观察结果。然而，变化和控制人类Δ 15 N的因素还没有得到很好的理解，主要是由于难以控制的饮食的participator.Materials和MethodsThese居民进行了研究，因为他们保持了相对传统的饮食习惯，允许定量记录的饮食。通过比较头发δ 15 N值和平均膳食δ 15 N值来估算Δ 15 N。结果表明：①不同研究地点的Δ 15 N存在显著差异（城市化程度最高的社区为3.9 ± 0.9‰，中等城市为5.2 ± 1.0‰，城市化程度最低的社区为5.0 ± 0.9‰;所有参与者的范围为1.2-7.3‰）; Δ 15 N估计值与动物蛋白质摄入量的几个指标呈负相关（饮食中的氮%：范围= 0.9-7.6%）。讨论我们假设几个因素的组合，可能包括尿素循环和氨基酸和蛋白质循环和/或代谢过程中的新合成，改变了参与者的Δ 15 N值。美国物理人类学杂志158：359-370，2015年。© 2015威利期刊公司.
ObjectivesWe present new nitrogen isotopic discrimination factor between diets and scalp hairs (Δ15NHair‐Diet: δ15NHair– δ15NDiet) for indigenous residents in three communities in the Papua New Guinea Highlands who consumed various amounts and qualities of protein. The Δ15N is important for precise evaluation of the dietary habits of human populations; in both contemporary and traditional lifestyles. Several hypotheses have been proposed regarding factors that affect Δ15N values, based largely on observations from animal feeding experiments. However, variations and factors controlling Δ15N in humans are not well understood, mainly due to the difficulty of controlling the diets of participants.Materials and MethodsThese residents were studied because they have maintained relatively traditional dietary habits, which allow quantitative recording of diets. Δ15N was estimated by comparing hair δ15N values to mean dietary δ15N values calculated from the recorded intake of each food item and their δ15N values.ResultsThe results showed that: i) there was a significant difference in Δ15N among study locations (3.9 ± 0.9‰ for most urbanized, 5.2 ± 1.0‰ for medium and 5.0 ± 0.9‰ for least urbanized communities; range = 1.2–7.3‰ for all participants); and ii) estimated Δ15N values were negatively correlated with several indicators of animal protein intake (% nitrogen in diet: range = 0.9–7.6%).DiscussionWe hypothesize that a combination of several factors, which presumably included urea recycling and amino acid and protein recycling and/orde novosynthesis during metabolic processes, altered the Δ15N values of the participants. Am J Phys Anthropol 158:359–370, 2015. © 2015 Wiley Periodicals, Inc.