Evidence map›Paper›PMID 9370456›Full record

ArticleBiophysical journal1997

Exchange of monooleoylphosphatidylcholine as monomer and micelle with membranes containing poly(ethylene glycol)-lipid.

D Needham, N Stoicheva, D V Zhelev

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 1997. 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
2.9field-weighted citation impact, top 8% 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, 110 citations in OpenAlex.

  1. Article
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  7. Review
  8. Inside-outside self-assembly of light-activated fast-release liposomes.Physical chemistry chemical physics : PCCP · 2015
    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

3 authors at 1 institution in 1 country.

D NeedhamDepartment of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708-0300, USA.
N Stoicheva
D V Zhelev
Duke University · US

Funding

MOLECULAR EXCHANGE WITH LIPID MEMBRANESR01GM040162 · NIGMS · DUKE UNIVERSITY · PI NEEDHAM, DAVID · 1995 to 2003
$798k
ELECTROPERMEABILIZATION/FUSION OF LIPID VESICLES &CELLSR29GM040162 · NIGMS · DUKE UNIVERSITY · PI NEEDHAM, DAVID · 1989 to 1993
–
NIGMS NIH HHS GM 40162
6 · The paper itself

Abstract

Surface-grafted polymers, such as poly(ethylene glycol) (PEG), provide an effective steric barrier against surface-surface and surface-macromolecule interactions. In the present work, we have studied the exchange of monooleoylphosphatidylcholine (MOPC) with vesicle membranes containing 750 mol wt surface-grafted PEG (incorporated as PEG-lipid) from 0 to 20 mol % and have analyzed the experimental results in terms of thermodynamic and stationary equilibrium models. Micropipette manipulation was used to expose a single lipid vesicle to a flow of MOPC solution (0.025 microM to 500 microM). MOPC uptake was measured by a direct measure of the vesicle area change. The presence of PEG(750) lipid in the vesicle membrane inhibited the partitioning of MOPC micelles (and to some extent microaggregates) into the membrane, while even up to 20 mol % PEG-lipid, it did not affect the exchange of MOPC monomers both into and out of the membrane. The experimental data and theoretical models show that grafted PEG acts as a very effective molecular scale "filter" and prevents micelle-membrane contact, substantially decreasing the apparent rate and amount of MOPC taken up by the membrane, thereby stabilizing the membrane in a solution of MOPC that would otherwise dissolve it.

Indexed as

KineticsLipid BilayersLiposomesLysophosphatidylcholinesMembrane FusionMicellesMicroscopy, VideoModels, BiologicalPhosphatidylcholinesPhosphatidylethanolaminesPhospholipidsPolyethylene GlycolsSurface PropertiesThermodynamics1-stearoyl-2-oleoyl-sn-glycero-3-phosphocholinedioleoyl-N-(monomethoxypolyethylene glycol succinyl)phosphatidylethanolamineLipid BilayersLiposomesLysophosphatidylcholinesMicellesPhosphatidylcholinesPhosphatidylethanolaminesPhospholipidsPolyethylene Glycols

Identifiers

PMID9370456
PMCPMC1181164
OpenAlexW2029973997

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.