Evidence map›Paper›PMID 26026161›Full record

ArticleThe Journal of biological chemistry2015

A Pressure-dependent Model for the Regulation of Lipoprotein Lipase by Apolipoprotein C-II.

Nathan L Meyers, Mikael Larsson, Gunilla Olivecrona, Donald M Small

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
1.6field-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

19 citing papers in PubMed, 32 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Review
  5. Quartet of APOCs and the Different Roles They Play in Diabetes.Arteriosclerosis, thrombosis, and vascular biology · 2023
    Review
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  7. Review
  8. 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 2 institutions in 2 countries.

Nathan L MeyersDepartment of Physiology and Biophysics, Boston University School of Medicine, Boston, Massachusetts 02118.
Mikael LarssonDepartment of Medical Biosciences/Physiological Chemistry, Umeå University, SE-901 87 Umeå, Sweden; Department of Medicine, UCLA, Los Angeles, California 90095.
Gunilla OlivecronaDepartment of Medical Biosciences/Physiological Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
Donald M SmallDepartment of Physiology and Biophysics, Boston University School of Medicine, Boston, Massachusetts 02118. Electronic address: dmsmall@bu.edu.
Boston University · USUmeå University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Apolipoprotein C-II (apoC-II) is the co-factor for lipoprotein lipase (LPL) at the surface of triacylglycerol-rich lipoproteins. LPL hydrolyzes triacylglycerol, which increases local surface pressure as surface area decreases and amphipathic products transiently accumulate at the lipoprotein surface. To understand how apoC-II adapts to these pressure changes, we characterized the behavior of apoC-II at multiple lipid/water interfaces. ApoC-II adsorption to a triacylglycerol/water interface resulted in large increases in surface pressure. ApoC-II was exchangeable at this interface and desorbed on interfacial compressions. These compressions increase surface pressure and mimic the action of LPL. Analysis of gradual compressions showed that apoC-II undergoes a two-step desorption, which indicates that lipid-bound apoC-II can exhibit at least two conformations. We characterized apoC-II at phospholipid/triacylglycerol/water interfaces, which more closely mimic lipoprotein surfaces. ApoC-II had a large exclusion pressure, similar to that of apoC-I and apoC-III. However, apoC-II desorbed at retention pressures higher than those seen with the other apoCs. This suggests that it is unlikely that apoC-I and apoC-III inhibit LPL via displacement of apoC-II from the lipoprotein surface. Upon rapid compressions and re-expansions, re-adsorption of apoC-II increased pressure by lower amounts than its initial adsorption. This indicates that apoC-II removed phospholipid from the interface upon desorption. These results suggest that apoC-II regulates the activity of LPL in a pressure-dependent manner. ApoC-II is provided as a component of triacylglycerol-rich lipoproteins and is the co-factor for LPL as pressure increases. Above its retention pressure, apoC-II desorbs and removes phospholipid. This triggers release of LPL from lipoproteins.

Indexed as

AdsorptionAmino Acid SequenceApolipoprotein C-IIHumansLipid MetabolismLipoprotein LipaseMolecular Sequence DataPhospholipidsPressureProtein BindingProtein ConformationProtein Structure, TertiarySurface PropertiesWaterApolipoprotein C-IILipoprotein LipasePhospholipidsWaterapolipoproteinlipaselipid dropletlipoprotein metabolismlow-density lipoprotein (LDL)triglyceride

Identifiers

PMID26026161
PMCPMC4505049
OpenAlexW1802190645

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.