Evidence map›Paper›PMID 21762661›Full record

ArticleGastroenterology2011

The PepT1-NOD2 signaling pathway aggravates induced colitis in mice.

Guillaume Dalmasso, Hang Thi Thu Nguyen, Sarah A Ingersoll, Saravanan Ayyadurai, Hamed Laroui, Moiz A Charania, Yutao Yan, Shanthi V Sitaraman, Didier Merlin

Open access · bronzeAbstract read
In one paragraph

Article in Gastroenterology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
3.4field-weighted citation impact, top 7% 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

33 citing papers in PubMed, 65 citations in OpenAlex.

  1. Pattern Recognition by NOD-Like Receptors.Advances in experimental medicine and biology · 2025
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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

9 authors at 2 institutions in 1 country.

Guillaume DalmassoDepartment of Medicine, Division of Digestive Diseases, Emory University, Atlanta, Georgia 30322, USA.
Hang Thi Thu Nguyen
Sarah A Ingersoll
Saravanan Ayyadurai
Hamed Laroui
Moiz A Charania
Yutao Yan
Shanthi V Sitaraman
Didier Merlin
Emory University · USVeterans Health Administration · US

Funding

Emory Epithelial Pathobiology Research Development CenterR24DK064399 · NIDDK · EMORY UNIVERSITY · PI PARKOS, CHARLES A · 2003 to 2012
$5.3M
DIET/GROWTH FACTOR MECHANISMS OF GUT ADAPTATIONR01DK055850 · NIDDK · EMORY UNIVERSITY · PI ZIEGLER, THOMAS R · 2000 to 2004
$1.5M
Role and regulation of Metalloproteinase-9 in the intestineR01DK076825 · NIDDK · GEORGIA STATE UNIVERSITY · PI MERLIN, DIDIER · 2008 to 2012
$1.5M
hPepT1 in Intestinal InflammationR56DK061941 · NIDDK · EMORY UNIVERSITY · PI MERLIN, DIDIER · 2009 to 2009
$436k
Intestinal PepT1 in Health and DiseaseR56DK084987 · NIDDK · GEORGIA STATE UNIVERSITY · PI MERLIN, DIDIER · 2010 to 2010
$367k
NIDDK NIH HHS R01 DK055850NIDDK NIH HHS R01 DK076825NIDDK NIH HHS R01-DK55850NIDDK NIH HHS R24 DK064399NIDDK NIH HHS R24-DK-064399NIDDK NIH HHS R56 DK061941NIDDK NIH HHS R56-DK-061941NIDDK NIH HHS R56 DK084987
6 · The paper itself

Abstract

BACKGROUND &

aimsThe human di/tripeptide transporter human intestinal H-coupled oligonucleotide transporter (hPepT1) is abnormally expressed in colons of patients with inflammatory bowel disease, although its exact role in pathogenesis is unclear. We investigated the contribution of PepT1 to intestinal inflammation in mouse models of colitis and the involvement of the nucleotide-binding oligomerization domain 2 (NOD2) signaling pathway in the pathogenic activity of colonic epithelial hPepT1.

methodsTransgenic mice were generated in which hPepT1 expression was regulated by the β-actin or villin promoters; colitis was induced using 2,4,6-trinitrobenzene sulfonic acid (TNBS) or dextran sodium sulfate (DSS) and the inflammatory responses were assessed. The effects of NOD2 deletion in the hPepT1 transgenic mice also was studied to determine the involvement of the PepT1-NOD2 signaling pathway.

resultsTNBS and DSS induced more severe levels of inflammation in β-actin-hPepT1 transgenic mice than wild-type littermates. Intestinal epithelial cell-specific hPepT1 overexpression in villin-hPepT1 transgenic mice increased the severity of inflammation induced by DSS, but not TNBS. Bone marrow transplantation studies showed that hPepT1 expression in intestinal epithelial cells and immune cells has an important role in the proinflammatory response. Antibiotics abolished the effect of hPepT1 overexpression on the inflammatory response in DSS-induced colitis in β-actin-hPepT1 and villin-hPepT1 transgenic mice, indicating that commensal bacteria are required to aggravate intestinal inflammation. Nod2-/-, β-actin-hPepT1 transgenic/Nod2-/-, and villin-hPepT1 transgenic/Nod2-/- littermates had similar levels of susceptibility to DSS-induced colitis, indicating that hPepT1 overexpression increased intestinal inflammation in a NOD2-dependent manner.

conclusionsThe PepT1-NOD2 signaling pathway is involved in aggravation of DSS-induced colitis in mice.

Indexed as

Signal TransductionActinsAnimalsAnti-Bacterial AgentsBone Marrow TransplantationColitisColonDextran SulfateDisease Models, AnimalHumansInflammation MediatorsMiceMice, Inbred C57BLMice, TransgenicMicrofilament ProteinsNod2 Signaling Adaptor ProteinActinsAnti-Bacterial AgentsDextran SulfateInflammation MediatorsMicrofilament ProteinsNod2 protein, mouseNod2 Signaling Adaptor ProteinPeptide Transporter 1SLC15A1 protein, humanSymportersTrinitrobenzenesulfonic Acidvillin

Identifiers

PMID21762661
PMCPMC3186842
OpenAlexW1966866937

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.