Dataset Information

A novel pathway for inositol conversion into propionate by Anaerostipes supports its potential health impact.

ABSTRACT: A novel propionate production pathway from inositol by commensal Anaerostipes which is known as intestinal butyrate producer was studied. The physiological relevance of this pathway was explored in human gut as well as potential health impact of Anaerostipes species to the human host.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Anaerostipes Rhamnosivorans

SUBMITTER: Sjef Boeren

LAB HEAD: Sjef Boeren

PROVIDER: PXD021084 | Pride | 2021-07-05

REPOSITORIES: Pride

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Publications

Conversion of dietary inositol into propionate and acetate by commensal Anaerostipes associates with host health.

Bui Thi Phuong Nam TPN Mannerås-Holm Louise L Puschmann Robert R Wu Hao H Troise Antonio Dario AD Nijsse Bart B Boeren Sjef S Bäckhed Fredrik F Fiedler Dorothea D deVos Willem M WM

Nature communications 20210810 1

We describe the anaerobic conversion of inositol stereoisomers to propionate and acetate by the abundant intestinal genus Anaerostipes. A inositol pathway was elucidated by nuclear magnetic resonance using [<sup>13</sup>C]-inositols, mass spectrometry and proteogenomic analyses in A. rhamnosivorans, identifying 3-oxoacid CoA transferase as a key enzyme involved in both 3-oxopropionyl-CoA and propionate formation. This pathway also allowed conversion of phytate-derived inositol into propionate as ...[more]

PMID: 34376656

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Project description:Cryptococcus neoformans is the most common cause of fungal meningitis, with high mortality and morbidity. The reason for the frequent occurrence of Cryptococcus infection in the central nervous system (CNS) is poorly understood. In this study, we find that inositol plays an important role in the transversal of Cryptococcus across the blood-brain barrier (BBB) both in an in vitro human BBB model and in vivo animal models. The inositol stimulation of BBB crossing is dependent upon fungal inositol transporters. The upregulation of genes involved in the inositol catabolism pathway is evident in a microarray analysis. The expression of CPS1, a gene encoding the hyaluronic acid synthase in Cryptococcus, is also upregulated by the inositol treatment. The production of hyaluronic acid increased in cells treated with inositol, which leads to the enhanced binding ability of Cryptococcus cells to the human brain microvascular endothelial cells (HBMECs) constituting the BBB. Overall, our studies provide a mechanism for inositol-dependent Cryptococcus transversal of the BBB, supporting our hypothesis that host inositol utilization by the fungus contributes to Cryptococcus CNS infection. To understand the effect of inositol on gene expression profiles during cell development, microarray experiments were performed to monitor the genes regulated by inositol. H99 overnight culture was washed with dH2O once, and cells were inoculated on SD medium with or without inositol. Cells were collected from SD plates 24 hr post-inoculation, washed with dH2O, and total RNA was purified. Total RNAs were extracted using Trizol Reagents (Invitrogen) and purified using the Qiagen RNeasy cleanup kit (Qiagen). Cy3 and Cy5-labeled cDNA were generated by incorporating amino-allyl-dUTP during reverse transcription of 5 Âµg of total RNA as described previously and competitively hybridized to a JEC21 whole-genome array generated previously at Washington University in Saint Louis. After hybridization, arrays were scanned with a GenePix 4000B scanner (Axon Instruments, http://www.axon.com) and analyzed by using GenePix Pro version 4.0 and BRB array tools (developed by Richard Simon and Amy Peng Lam at the National Cancer Institute; http://linus.nci.nih.gov/BRB-ArrayTools.html)

Dataset Information

A novel pathway for inositol conversion into propionate by Anaerostipes supports its potential health impact.

Publications

Conversion of dietary inositol into propionate and acetate by commensal Anaerostipes associates with host health.

Similar Datasets

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