Evidence map›Paper›PMID 25659123›Full record

ArticlePloS one2015

Neuropilin 1 is essential for gastrointestinal smooth muscle contractility and motility in aged mice.

Maiko Yamaji, Marwa Mahmoud, Ian M Evans, Ian C Zachary

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
1.8field-weighted citation impact, top 17% 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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
  2. Phenotypic switching of gastrointestinal smooth muscle cells and the regulatory role of macrophages: a literature review.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2026
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  18. Guidance Molecules in Vascular Smooth Muscle.Frontiers in physiology · 2018
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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

4 authors at 1 institution in 1 country.

Maiko YamajiCentre for Cardiovascular Biology and Medicine, Division of Medicine, the Rayne Building, University College London, London, WC1E 6JJ, United Kingdom.
Marwa MahmoudCentre for Cardiovascular Biology and Medicine, Division of Medicine, the Rayne Building, University College London, London, WC1E 6JJ, United Kingdom.
Ian M EvansCentre for Cardiovascular Biology and Medicine, Division of Medicine, the Rayne Building, University College London, London, WC1E 6JJ, United Kingdom.
Ian C ZacharyCentre for Cardiovascular Biology and Medicine, Division of Medicine, the Rayne Building, University College London, London, WC1E 6JJ, United Kingdom.
University College London · GB

Funding

British Heart Foundation RG/06/003British Heart Foundation RG/06/003/21131British Heart Foundation RG/11/11/29050
6 · The paper itself

Abstract

BACKGROUND AND

aimsNeuropilin 1 (NRP1) is a non-tyrosine kinase receptor for vascular endothelial growth factor (VEGF) and class 3 semaphorins, playing a role in angiogenesis and neuronal axon guidance, respectively. NRP1 is expressed in smooth muscle cells (SMC) but the functional role of NRP1 in SMC has not been elucidated. We therefore investigated the biological relevance of NRP1 in SMC in vivo by generating mice with SMC-specific Nrp1 deficiency.

methodsConditional gene targeting generated SMC-specific Nrp1 knockout mice (Nrp1SMKO) in which Cre recombinase is driven by the smooth muscle-specific myosin heavy chain (smMHC) promoter.

resultsSMC-specific Nrp1 deficiency resulted in a significant reduction in intestinal length by 6 months, and, by 18 months, in severe constipation, and enlargement of the intestine consistent with chronic intestinal pseudo-obstruction. These effects were associated with significant thinning of the intestinal smooth muscle, and decreased intestinal contractility. Expression of contractile proteins was reduced in Nrp1SMKO mice, including the smMHC isoform, SMB, whereas we observed a significant increase in the expression of the small-conductance calcium-activated potassium channel 3 (SK3/KCa2.3), implicated in negative regulation of smooth muscle contraction.

conclusionsNrp1 deficiency in visceral SMC results in adult-onset defects in gastrointestinal contractility and motility and causes a shift to a less contractile SMC phenotype. These findings indicate a new role for Nrp1 in the maintenance of the visceral SMC contractile phenotype required for normal GI motility in aged mice.

Indexed as

AgingAnimalsGastrointestinal MotilityIntestinal MucosaMiceMice, KnockoutMuscle ContractionMuscle, SmoothNeuropilin-1Neuropilin-1

Identifiers

PMID25659123
PMCPMC4319892
OpenAlexW2089891477

What OpenQuestion holds

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LicenceCC BY
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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.