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Impact of time and temperature on gut microbiota and SCFA composition in stool samples

Cunningham, Janet L. and Bramstang, Ludvig and Singh, Abhijeet and Bannak Gedara, Shishanthi Jayarathna and Rasmusson, Annica J. and Moazzami, Ali and Müller, Bettina (2020). Impact of time and temperature on gut microbiota and SCFA composition in stool samples. PLoS ONE. 15 , e0236944 , 1-15
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Abstract

Gut dysbiosis has been implicated in the pathophysiology of a growing number of non-communicable diseases. High through-put sequencing technologies and short chain fatty acid (SCFA) profiling enables surveying of the composition and function of the gut microbiota and provide key insights into host-microbiome interactions. However, a methodological problem with analyzing stool samples is that samples are treated and stored differently prior to submission for analysis potentially influencing the composition of the microbiota and its metabolites. In the present study, we simulated the sample acquisition of a large-scale study, in which stool samples were stored for up to two days in the fridge or at room temperature before being handed over to the hospital. To assess the influence of time and temperature on the microbial community and on SCFA composition in a controlled experimental setting, the stool samples of 10 individuals were exposed to room and fridge temperatures for 24 and 48 hours, respectively, and analyzed using 16S rRNA gene amplicon sequencing, qPCR and nuclear magnetic resonance spectroscopy. To best of our knowledge, this is the first study to investigate the influence of storage time and temperature on the absolute abundance of methanogens, and ofLactobacillus reuteri. The results indicate that values obtained for methanogens,L.reuteriand total bacteria are still representative even after storage for up to 48 hours at RT (20 degrees C) or 4 degrees C. The overall microbial composition and structure appeared to be influenced more by laboratory errors introduced during sample processing than by the actual effects of temperature and time. Although microbial activity was demonstrated by elevated SCFA at both 4 degrees C and RT, SCFAs ratios were more stable over the different conditions and may be considered as long as samples are come from similar storage conditions.

Authors/Creators:Cunningham, Janet L. and Bramstang, Ludvig and Singh, Abhijeet and Bannak Gedara, Shishanthi Jayarathna and Rasmusson, Annica J. and Moazzami, Ali and Müller, Bettina
Title:Impact of time and temperature on gut microbiota and SCFA composition in stool samples
Year of publishing :2020
Volume:15
Article number:e0236944
Number of Pages:15
Publisher:PLoS
ISSN:1932-6203
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Microbiology (Microbiology in the medical area to be 30109)
URN:NBN:urn:nbn:se:slu:epsilon-p-107752
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107752
Additional ID:
Type of IDID
DOI10.1371/journal.pone.0236944
Web of Science (WoS)000560006800018
ID Code:17550
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Molecular Sciences
Deposited By: SLUpub Connector
Deposited On:06 Oct 2020 07:38
Metadata Last Modified:06 Oct 2020 07:38

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