Measurement of 24-hour Continuous Human CH4Release in a Whole Room Indirect Calorimeter

Author:

Carnero E.A.,Bock C.P.,Liu Y.,Corbin K.D.,Wohlers-Kariesch E.,Ruud K.,Moon J.,Andrew M.,Krajmalnik-Brown R.,Muraviev A.,Vodopyanov K.L.,Smith S.R.

Abstract

AbstractWe describe the technology and validation of a new whole room indirect calorimeter (WRIC) methodology to quantify methane (CH4) released from the human body over 24h concurrently with the assessment of energy expenditure and substrate utilization. The new system extends the assessment of energy metabolism by adding CH4, a downstream product of microbiome fermentation that could contribute to energy balance.MethodsOur new system consists of an established whole room indirect calorimeter WRIC combined with the addition of off-axis integrated-cavity output spectroscopy (OA-ICOS) to measure CH4concentrations ([CH4]). The volume of CH4released (VCH4) was calculated after measuring air flow rates. Development and validation included environmental experiments to measure the stability of the atmospheric [CH4], infusing CH4into the WRIC and cross-validation studies comparing [CH4] quantified by OA-ICOS and mid-infrared dual-comb spectroscopy (MIR DCS). Reliability of the whole system is reported between years, weeks, days, and validated CH4infusions. The cross-validation and reliability of VCH4released from the human body was determined in 19 participants on consecutive days. In addition, we describe a postprocessing analytical method to differentiate CH4released from breath versus intestine by matching times of stool production and contemporaneous VCH4release.ResultsOur infusion data indicated that the system measured 24h [CH4] and VCH4with high sensitivity, reliability and validity. Cross-validation studies showed good agreement between OA-ICOS and MIR DCS technologies (r= 0.979, P<0.0001). Initial human data revealed 24h VCH4was highly variable between subjects and within / between days; this highlights the importance of a 24-h continuous assessment to have a complete picture of VCH4 release. Finally, our method to quantify VCH4released by breath or colon suggested that over 50% of the CH4was eliminated through the breath.ConclusionsThe method allows, for the first time, measurement of 24h VCH4(in kcal) and therefore the measurement of the proportion of human energy intake fermented to CH4by the gut microbiome and released via breath or directly from the intestine. Our method is accurate, valid, and will provide meaningful data to understand not only interindividual variation, but also allows us to track the effects of dietary, probiotic, bacterial and fecal microbiota transplantation on VCH4.

Publisher

Cold Spring Harbor Laboratory

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3