Evidence map›Paper›PMID 22222761›Full record

ArticleDevelopmental biology2012

Mutation of zebrafish Snapc4 is associated with loss of the intrahepatic biliary network.

Madeline Schaub, Justin Nussbaum, Heather Verkade, Elke A Ober, Didier Y R Stainier, Takuya F Sakaguchi

Open access · greenAbstract read
In one paragraph

Article in Developmental biology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.5field-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

12 citing papers in PubMed, 21 citations in OpenAlex.

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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

6 authors at 2 institutions in 1 country.

Madeline SchaubDepartment of Stem Cell Biology and Regenerative Medicine, Cleveland Clinic, Cleveland, OH 44195, USA.
Justin Nussbaum
Heather Verkade
Elke A Ober
Didier Y R Stainier
Takuya F Sakaguchi
Cleveland Clinic · USUniversity of California, San Francisco · US

Funding

Forward genetic analysis of biliary system formation in zebrafishR00DK078138 · NIDDK · CLEVELAND CLINIC LERNER COM-CWRU · PI SAKAGUCHI, TAKUYA · 2010 to 2012
$738k
Forward genetic analysis of biliary system formation in zebrafishK99DK078138 · NIDDK · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI SAKAGUCHI, TAKUYA · 2008 to 2009
$164k
NIDDK NIH HHS DK078138NIDDK NIH HHS K99 DK078138NIDDK NIH HHS R00 DK078138
6 · The paper itself

Abstract

Biliary epithelial cells line the intrahepatic biliary network, a complex three-dimensional network of conduits. The loss of differentiated biliary epithelial cells is the primary cause of many congenital liver diseases. We identified a zebrafish snapc4 (small nuclear RNA-activating complex polypeptide 4) mutant in which biliary epithelial cells initially differentiate but subsequently disappear. In these snapc4 mutant larvae, biliary epithelial cells undergo apoptosis, leading to degeneration of the intrahepatic biliary network. Consequently, in snapc4 mutant larvae, biliary transport of ingested fluorescent lipids to the gallbladder is blocked. Snapc4 is the largest subunit of a protein complex that regulates small nuclear RNA (snRNA) transcription. The snapc4(s445) mutation causes a truncation of the C-terminus, thereby deleting the domain responsible for a specific interaction with Snapc2, a vertebrate specific subunit of the SNAP complex. This mutation leads to a hypomorphic phenotype, as only a subset of snRNA transcripts are quantitatively altered in snapc4(s445) mutant larvae. snapc2 knockdown also disrupts the intrahepatic biliary network in a similar fashion as in snapc4(s445) mutant larvae. These data indicate that the physical interaction between Snapc2 and Snapc4 is important for the expression of a subset of snRNAs and biliary epithelial cell survival in zebrafish.

Indexed as

MutationAnimalsAnimals, Genetically ModifiedBinding SitesEpithelial CellsFemaleGene Expression Regulation, DevelopmentalGene Knockdown TechniquesGene Regulatory NetworksGreen Fluorescent ProteinsImmunohistochemistryIn Situ HybridizationLarvaLiverMaleMicroscopy, ConfocalGreen Fluorescent ProteinsSnapc4 protein, zebrafishTranscription FactorsZebrafish Proteins

Identifiers

PMID22222761
PMCPMC3711868
OpenAlexW2072109740

What OpenQuestion holds

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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.