Evidence map›Paper›PMID 22257482›Full record

ArticleJournal of lipid research2012

ApoA-IV modulates the secretory trafficking of apoB and the size of triglyceride-rich lipoproteins.

Richard B Weinberg, James W Gallagher, Melissa A Fabritius, Gregory S Shelness

Open access · hybridAbstract read
In one paragraph

Article in Journal of lipid research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
4.2field-weighted citation impact, top 5% 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

32 citing papers in PubMed, 57 citations in OpenAlex.

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  16. A novel system to quantify intestinal lipid digestion and transport.Biochimica et biophysica acta. Molecular and cell biology of lipids · 2018
    Article
  17. CREBH Regulates Systemic Glucose and Lipid Metabolism.International journal of molecular sciences · 2018
    Review
  18. 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

4 authors at 1 institution in 1 country.

Richard B WeinbergDepartment of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
James W Gallagher
Melissa A Fabritius
Gregory S Shelness
Wake Forest University · US

Funding

TISSUE CULTURE COREP01HL049373 · NHLBI · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI RUDEL, LAWRENCE L · 1993 to 2012
$23.8M
STRUCTURE AND LIPID BINDING OF HUMAN APOLIPOPROTEINR01HL030897 · NHLBI · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI WEINBERG, RICHARD B · 1987 to 2010
$2.9M
STRUCTURE AND LIPID BINDING OF HUMAN APOLIPOPROTEIN A-IVR23HL030897 · NHLBI · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI WEINBERG, RICHARD B · 1985 to 1986
–
NHLBI NIH HHS HL-30897NHLBI NIH HHS HL-49373NHLBI NIH HHS P01 HL049373NHLBI NIH HHS R01 HL030897
6 · The paper itself

Abstract

Although the evidence linking apoA-IV expression and triglyceride (TG)-rich lipoprotein assembly and secretion is compelling, the intracellular mechanisms by which apoA-IV could modulate these processes remain poorly understood. We therefore examined the functional impact of apoA-IV expression on endogenous apoB, TG, and VLDL secretion in stably transfected McA-RH7777 rat hepatoma cells. Expression of apoA-IV modified with the endoplasmic reticulum (ER) retention signal KDEL (apoA-IV-KDEL) dramatically decreased both the rate and efficiency of endogenous apoB secretion, suggesting a presecretory interaction between apoA-IV-KDEL and apoB or apoB-containing lipoproteins. Expression of native apoA-IV using either a constitutive or tetracycline-inducible promoter delayed the initial rate of apoB secretion and reduced the final secretion efficiency by ∼40%. However, whereas apoA-IV-KDEL reduced TG secretion by 75%, expression of native apoA-IV caused a 20-35% increase in TG secretion, accompanied by a ∼55% increase in VLDL-associated apoB, an increase in the TG:phospholipid ratio of secreted d < 1.006 lipoproteins, and a 10.1 nm increase in peak VLDL(1) particle diameter. Native apoA-IV expression had a negligible impact on expression of the MTP gene. These data suggest that by interacting with apoB in the secretory pathway, apoA-IV alters the trafficking kinetics of apoB-containing TG-rich lipoproteins through cellular lipidation compartments, which in turn, enhances particle expansion and increases TG secretion.

Indexed as

AnimalsApolipoproteins AApolipoproteins BCarrier ProteinsCell Line, TumorCulture MediaDoxycyclineGene Expression RegulationHumansImmunoprecipitationLipid MetabolismLipoproteins, VLDLPromoter Regions, GeneticProtein TransportRatsTetracyclineapolipoprotein A-IVApolipoproteins AApolipoproteins BCarrier ProteinsCulture MediaDoxycyclineLipoproteins, VLDLmicrosomal triglyceride transfer proteinTetracyclineTriglycerides

Identifiers

PMID22257482
PMCPMC3307650
OpenAlexW2170654697

What OpenQuestion holds

Textmetadata
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.