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boysil

铁杆木虫 (小有名气)

[交流] Nature:华南地区的人最“健康”zz

一个国际科学家小组近日分析了数千份冰冻的尿样,得出了关于全球人类新陈代谢多样性的新信息,包括人们的食物种类及他们的内脏微生物怎样处理这些食物等。分析结果认为,居住在中国南方地区的人具有最独特的内脏特征,从某种意义上来说,他们是最健康的。相关论文4月20日在线发表于《自然》(Nature)杂志上。

领导此次研究的是英国伦敦帝国理工学院的Jeremy Nicholson。他和同事分析的尿样来自4680个人,分别于1997至1999年间采得。研究人员应用质子核磁共振光谱法鉴别出了尿中的所有化学物质。

分析结果得到了带有数千个峰值的图表,每一个峰值对应一个不同的代谢物。研究人员接下来在来自中国、日本、英国和美国的17个人群中对这些图表进行了比较。

Nicholson说:“我们的研究显示,世界上不同地区的人新陈代谢极其不同。英国人和美国人的新陈代谢组(metabolome)几乎相同,中国人和日本人虽然在遗传上很相似,但是在新陈代谢上完全不同。”而居住在夏威夷的人新陈代谢组则与美国本土及日本人的很相似。

Nicholson表示,令人感兴趣的是,17个人群之间最大的差别是中国南方地区的人与其它人群之间的差异。他说:“中国南方地区的人食物种类非常不同,范围也要广阔得多。泛泛来说,中国南方的人是最健康的,而美国德州南部的人是最不健康的。”

另外,研究人员还发现了高血压与一些代谢物之间的有趣的联系,这些代谢物包括甲酸盐和马尿酸盐等。甲酸盐含量高,血压会升高;而马尿酸盐含量较低时,血压也会升高,具体原因有待于进一步研究。

美国国立人类基因组研究所的Teri Manolio认为,这一研究证实了同时检测多个新陈代谢组的可行性。她说:“这为在不同人群间研究食物与微生物开辟了全新的路径,它有可能成为一个范例研究,具有可行性和可复制性。”

她同时表示,内脏微生物对于健康的影响一直以来被低估了。她说:“正是肠道和其它一些地方的微生物,影响了我们处理食物和对感染作出反应的方式。”(科学网 梅进/编译)

生物谷推荐原始出处:

(Nature),doi:10.1038/nature06882,Jeremy K. Nicholson,Paul Elliott

Human metabolic phenotype diversity and its association with diet and blood pressure
Elaine Holmes1,7, Ruey Leng Loo1,2,7, Jeremiah Stamler3, Magda Bictash1,2, Ivan K. S. Yap1,2, Queenie Chan2, Tim Ebbels1, Maria De Iorio2, Ian J. Brown2, Kirill A. Veselkov1, Martha L. Daviglus3, Hugo Kesteloot4, Hirotsugu Ueshima5, Liancheng Zhao6, Jeremy K. Nicholson1 & Paul Elliott2

Biomolecular Medicine, Division of Surgery, Oncology, Reproductive Biology and Anaesthetics (SORA), Faculty of Medicine, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
Department of Epidemiology and Public Health, Imperial College London, St Mary's Campus, London W2 1PG, UK
Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
Department of Public Health, Division of Epidemiology, Akademisch Ziekenhuis St Rafael, Leuven B-3000, Belgium
Department of Health Science, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
Department of Epidemiology, Fu Wai Hospital and Cardiovascular Institute, Chinese Academy of Medical Sciences, Beijing 100037, China
These authors contributed equally to this work.

Metabolic phenotypes are the products of interactions among a variety of factors—dietary, other lifestyle/environmental, gut microbial and genetic1, 2, 3. We use a large-scale exploratory analytical approach to investigate metabolic phenotype variation across and within four human populations, based on 1H NMR spectroscopy. Metabolites discriminating across populations are then linked to data for individuals on blood pressure,

a major risk factor for coronary heart disease and stroke (leading causes of mortality worldwide4). We analyse spectra from two 24-hour urine specimens for each of 4,630 participants from the INTERMAP epidemiological study5, involving 17 population samples aged 40–59 in China, Japan, UK and USA. We show that urinary metabolite excretion patterns for East Asian and western population samples, with contrasting diets, diet-related major risk factors, and coronary heart disease/stroke rates, are significantly differentiated (P < 10-16), as are Chinese/Japanese metabolic phenotypes, and subgroups with differences in dietary vegetable/animal protein and blood pressure6. Among discriminatory metabolites, we quantify four and show association (P < 0.05 to P < 0.0001) of mean 24-hour urinary formate excretion with blood pressure in multiple regression analyses for individuals. Mean 24-hour urinary excretion of alanine (direct) and hippurate (inverse), reflecting diet and gut microbial activities2, 7, are also associated with blood pressure of individuals. Metabolic phenotyping applied to high-quality epidemiological data offers the potential to develop an area of aetiopathogenetic knowledge involving discovery of novel biomarkers related to cardiovascular disease risk.
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xiaoyur

金虫 (著名写手)

那是从尿样上来分析的
从空气成分上来分析,华南应该是倒数的
爱的反义词不是恨 而是冷漠!
2楼2008-04-22 22:22:48
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boysil

铁杆木虫 (小有名气)

如果是从空气分析
那只代表生存环境吧
3楼2008-04-23 23:12:22
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