Evidence map›Paper›PMID 34462225›Full record

ArticleSurgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery2021

Toll-like receptor 4 and myeloid differentiation factor 88 are required for gastric bypass-induced metabolic effects.

Marwa Abu El Haija, Yuanchao Ye, Yi Chu, Hussein Herz, Benjamin Linden, Shailesh K Shahi, Kasra Zarei, Ashutosh K Mangalam, Steven J Mcelroy, Mohamad Mokadem

Abstract read
In one paragraph

Article in Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–field-weighted citation impact
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

5 citing papers in PubMed.

  1. Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors.

Marwa Abu El HaijaStead Family Department of Pediatrics, University of Iowa Carver College of Medicine, Iowa City, Iowa; Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Stanford University School of Medicine & Lucile Packard Children's Hospital, Palo Alto, California.
Yuanchao YeDepartment of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Yi ChuDepartment of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Hussein HerzDepartment of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Benjamin LindenDepartment of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Shailesh K ShahiDepartment of Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Kasra ZareiMedical Scientist Training Program, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Ashutosh K MangalamDepartment of Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa; Interdisciplinary Graduate Program in Immunology and Molecular Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Steven J McelroyStead Family Department of Pediatrics, University of Iowa Carver College of Medicine, Iowa City, Iowa; Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Mohamad MokademDepartment of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa; Fraternal Orders of Eagles Diabetes Research Center, University of Iowa, Iowa City, Iowa; Obesity Research & Education Initiative, University of Iowa, Iowa City, Iowa; Veterans Affairs Health Care System, Iowa City, Iowa. Electronic address: mohamad-mokadem@uiowa.edu.

Funding

Pulmonary Toxicology Facility CoreP30ES005605 · NIEHS · UNIVERSITY OF IOWA · PI Jong Sung Kim · 1990 to 2026
$40.5M
Linking diet, gut microbiota and autoimmune disease: Bacteria induced phytoestrogen metabolites impact immune function in Experimental Autoimmune EncephalitisR01AI137075 · NIAID · UNIVERSITY OF IOWA · PI MANGALAM, ASHUTOSH KUMAR · 2018 to 2022
$2.0M
BLRD VA I01 BX004774CSRD VA I01 CX002212NIAID NIH HHS R01 AI137075NIEHS NIH HHS P30 ES005605
6 · The paper itself

Abstract

backgroundToll-like receptor 4 (TLR4) has been suggested as one of the forefront cross-communicators between the intestinal bacteria and the host to regulate inflammatory signals and energy homeostasis. High-fat diet-induced inflammation is mediated by changes in gut microbiota and requires a functional TLR-4, the deficiency of which renders mice resistant to diet-induced obesity and its associated metabolic dysfunction. Furthermore, gut microbiota was suggested to play a key role in the beneficial effects of Roux-en-Y gastric bypass (RYGB), a commonly performed bariatric procedure.

objectivesTo explore whether TLR4, myeloid differentiation factor 8 (MyD88; 1 of its key downstream signaling regulators) and gut microbiota play an integrative role in RYGB-induced metabolic outcomes.

settingAnimal- based study.

methodWe performed RYGB in TLR4 and MyD88 knock-out (KO) mice and used fecal microbiota transplant (FMT) from RYGB-operated animals to these genetic mouse models to address our questions.

resultsWe demonstrate that RYGB reduces TLR4 expression explicitly in the small and large intestine of C57Blc/6J mice. We also show that TLR4 KO mice have an attenuated glucoregulatory response to RYGB. In addition, we reveal that MyD88 KO mice fail to respond to all RYGB-induced metabolic effects. Finally, fecal microbiota transplant from RYGB-operated mice into TLR4 KO and MyD88 KO naïve recipients fails to induce a metabolic phenotype similar to that of the donors, as it does in wild-type recipients.

conclusionTLR4 and MyD88 are required for RYGB-induced metabolic response that is likely mediated by gut microbiome.

Indexed as

Gastric BypassGastrointestinal MicrobiomeAnimalsMiceMyeloid Differentiation Factor 88ObesityToll-Like Receptor 4MYD88 protein, humanMyeloid Differentiation Factor 88Tlr4 protein, mouseToll-Like Receptor 4Gastric bypassGut microbiomeMetabolic regulationMyD88TLR4

Identifiers

PMID34462225
PMCPMC9083208

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.