Evidence map›Paper›PMID 35863343›Full record

ArticleCell host & microbe2022

Gut commensals expand vitamin A metabolic capacity of the mammalian host.

Maryam Bonakdar, Lindsay C Czuba, Geongoo Han, Guo Zhong, Hien Luong, Nina Isoherranen, Shipra Vaishnava

Open access · greenAbstract read
In one paragraph

Article in Cell host & microbe, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
6.1field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

42 citing papers in PubMed, 60 citations in OpenAlex.

  1. Review
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  9. Frontiers in nutrition · 2026
    Article
  10. Review
  11. Review
  12. The Probiotic Effects ofInternational journal of microbiology · 2026
    Article
  13. Article
  14. Gut Microbial Metabolism in Colorectal Cancer.Methods in molecular biology (Clifton, N.J.) · 2026
    Review
  15. Review
  16. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 1 country.

Maryam BonakdarMolecular Microbiology & Immunology, Brown University, Providence, RI 02912, USA.
Lindsay C CzubaDepartment of Pharmaceutics, University of Washington, Seattle, WA 98195, USA.
Geongoo HanMolecular Microbiology & Immunology, Brown University, Providence, RI 02912, USA.
Guo ZhongDepartment of Pharmaceutics, University of Washington, Seattle, WA 98195, USA.
Hien LuongMolecular Microbiology & Immunology, Brown University, Providence, RI 02912, USA.
Nina IsoherranenDepartment of Pharmaceutics, University of Washington, Seattle, WA 98195, USA. Electronic address: ni2@uw.edu.
Shipra VaishnavaMolecular Microbiology & Immunology, Brown University, Providence, RI 02912, USA. Electronic address: shipra_vaishnava@brown.edu.
Brown University · USUniversity of Washington · US

Funding

Diabetes, Obesity and Metabolism Training ProgramT32DK007247 · NIDDK · UNIVERSITY OF WASHINGTON · PI GREGORY J MORTON, KRISTINA Marie UTZSCHNEIDER · 1986 to 2026
$10.0M
Vitamin A metabolism at the host-microbiome interfaceR01DK113265 · NIDDK · BROWN UNIVERSITY · PI Shipra Vaishnava · 2018 to 2026
$4.0M
Mechanisms of Regulation of Retinoic Acid HomeostasisR01GM111772 · NIGMS · UNIVERSITY OF WASHINGTON · PI ISOHERRANEN, NINA · 2014 to 2021
$3.0M
Predoctoral Training Program in Biological Data Science at Brown UniversityT32GM128596 · NIGMS · BROWN UNIVERSITY · PI RAMACHANDRAN, SOHINI, SANDSTEDE, BJORN · 2018 to 2022
$1.5M
Vitamin A metabolizing activity of the gut microbiome.R21AI168772 · NIAID · BROWN UNIVERSITY · PI VAISHNAVA, SHIPRA · 2022 to 2023
$452k
NIAID NIH HHS R21 AI168772NIDDK NIH HHS R01 DK113265NIDDK NIH HHS T32 DK007247NIGMS NIH HHS R01 GM111772NIGMS NIH HHS T32 GM128596
6 · The paper itself

Abstract

Conversion of dietary vitamin A (VA) into retinoic acid (RA) is essential for many biological processes and thus far studied largely in mammalian cells. Using targeted metabolomics, we found that commensal bacteria in the mouse gut lumen produced a high concentration of the active retinoids, all-trans-retinoic acid (atRA) and 13-cis-retinoic acid (13cisRA), as well as the principal circulating retinoid, retinol. Ablation of anerobic bacteria significantly reduced retinol, atRA, and 13cisRA, whereas introducing these bacteria into germ-free mice significantly enhanced retinoids. Remarkably, cecal bacterial supplemented with VA produced active retinoids in vitro, establishing that gut bacteria encode metabolic machinery necessary for multistep conversion of dietary VA into its active forms. Finally, gut bacteria Lactobacillus intestinalis metabolized VA and specifically restored RA levels in the gut of vancomycin-treated mice. Our work establishes vitamin A metabolism as an emergent property of the gut microbiome and lays the groundwork for developing probiotic-based retinoid therapy.

Indexed as

TretinoinVitamin AAnimalsMammalsMiceRetinoidsRetinoidsTretinoinVitamin A13-cis-retinoic acidall-trans-retinoic acidgerm-free miceLC-MS/MSmicrobiomeretinolvitamin A metabolism

Identifiers

PMID35863343
PMCPMC9378501
OpenAlexW4286255077

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.