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印度南极考察队队员尿液代谢物谱分析:基于核磁共振光谱的代谢组学研究。

Urine metabolite profiling of Indian Antarctic Expedition members: NMR spectroscopy-based metabolomic investigation.

作者信息

Bhushan Brij, Upadhyay Deepti, Sharma Uma, Jagannathan Naranamangalam, Singh Shashi Bala, Ganju Lilly

机构信息

Defence Institute of Physiology and Allied Sciences (DIPAS), DRDO, Lucknow Road, Timarpur, New Delhi 110054, India.

All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India.

出版信息

Heliyon. 2021 May 25;7(5):e07114. doi: 10.1016/j.heliyon.2021.e07114. eCollection 2021 May.

Abstract

The southernmost region of earth, Antarctica, has world's most challenging environments. Those who live for long time and work in Antarctic stations are subjected to environmental stresses such as cold weather, photoperiod variations leading to disrupted sleep cycles, constrained living spaces, dry air, non-availability of fresh food items, and high electromagnetic radiations, psychological factors, such as geographical and social isolation, etc. All these factors have a significant impact on the human body. The present study investigated the impact of Antarctica harsh environment on human physiology and its metabolic processes by evaluating urine metabolome, using 1H NMR spectroscopy and analyzing certain physiological and clinical parameters for correlation with physiological expression data and metabolite results. Two study groups - before Antarctic exposure (B) and after Antarctic exposure (E), consisting of 11 subjects, exposed to one-month summer expedition, were compared. 35 metabolites in urine samples were identified from the 700 MHz H NMR spectra from where integral intensity of 22 important metabolites was determined. Univariate analysis indicated significant decrease in the levels of citrate and creatinine in samples collected post-expedition. Multivariate analysis was also performed using 1H NMR spectroscopy, because independent metabolite abundances may complement each other in predicting the dependent variables. 10 metabolites were identified among the groups; the OPLS-DA and VIP score indicated variation in appearance of metabolites over different time periods with insignificant change in the intensities. Metabolite results illustrate the impact of environmental stress or altered life style including the diet with absence of fresh fruits and vegetables, on the pathophysiology of the human health. Metabolic adaptation to Antarctic environmental stressors may help to highlight the effect of short-term physiological status and provide important information during Antarctic expeditions to formulate management programmes.

摘要

地球最南端的地区南极洲拥有世界上最具挑战性的环境。那些在南极科考站长期生活和工作的人会受到多种环境压力的影响,比如寒冷天气、导致睡眠周期紊乱的光周期变化、有限的居住空间、干燥的空气、新鲜食物的匮乏、高电磁辐射,以及地理和社会隔离等心理因素。所有这些因素都会对人体产生重大影响。本研究通过使用核磁共振氢谱评估尿液代谢组,并分析某些生理和临床参数以与生理表达数据和代谢物结果进行关联,来探究南极洲恶劣环境对人体生理及其代谢过程的影响。对两个研究组——南极暴露前(B)组和南极暴露后(E)组进行了比较,每组由11名参与为期一个月夏季科考的受试者组成。从700兆赫核磁共振氢谱中鉴定出尿液样本中的35种代谢物,并测定了其中22种重要代谢物的积分强度。单变量分析表明,科考后采集的样本中柠檬酸盐和肌酐水平显著降低。还使用核磁共振氢谱进行了多变量分析,因为独立的代谢物丰度在预测因变量时可能会相互补充。在两组中鉴定出10种代谢物;正交偏最小二乘法判别分析(OPLS-DA)和变量重要性投影(VIP)得分表明,不同时间段代谢物的出现存在差异,但强度变化不显著。代谢物结果说明了环境压力或生活方式改变(包括缺乏新鲜水果和蔬菜的饮食)对人类健康病理生理学的影响。对南极环境压力源的代谢适应可能有助于突出短期生理状态的影响,并在南极科考期间提供重要信息以制定管理方案。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acf0/8170161/7ebc2318923e/gr1.jpg

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