Evidence map›Paper›PMID 21767490›Full record

ArticleBiophysical journal2011

Structural effects and translocation of doxorubicin in a DPPC/Chol bilayer: the role of cholesterol.

Tyrone J Yacoub, Allam S Reddy, Igal Szleifer

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
0.9field-weighted citation impact, top 26% 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

20 citing papers in PubMed, 63 citations in OpenAlex.

  1. 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 2 institutions in 1 country.

Tyrone J YacoubDepartment of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois, USA.
Allam S Reddy
Igal Szleifer
Northwestern University · USUniversity of Wisconsin–Madison · US

Funding

Development of Bioresponsive Lipids for Intracellular DeliveryR01GM087016 · NIGMS · PURDUE UNIVERSITY · PI THOMPSON, DAVID H · 2009 to 2012
$1.2M
NIGMS NIH HHS GM087016NIGMS NIH HHS R01 GM087016
6 · The paper itself

Abstract

We use molecular dynamics simulations to characterize the influence of cholesterol (Chol) on the interaction between the anticancer drug doxorubicin (DOX) and a dipalmitoyl phosphatidylcholine/Chol lipid bilayer. We calculate the potential of mean force, which gives us an estimate of the free energy barrier for DOX translocation across the membrane. We find free energy barriers of 23.1 ± 3.1 k(B)T, 36.8 ± 5.1 k(B)T, and 54.5 ± 4.7 k(B)T for systems composed of 0%, 15%, and 30% Chol, respectively. Our predictions agree with Arrhenius activation energies from experiments using phospholipid membranes, including 20 k(B)T for 0% Chol and 37.2 k(B)T for 20% Chol. The location of the free energy barrier for translocation across the bilayer is dependent on composition. As Chol concentration increases, this barrier changes from the release of DOX into the water to flip-flop over the membrane center. The drug greatly affects local membrane structure by attracting dipalmitoyl phosphatidylcholine headgroups, curving the membrane, and allowing water penetration. Despite its hydrophobicity, DOX facilitates water transport via its polar groups.

Indexed as

1,2-DipalmitoylphosphatidylcholineBiological TransportCholesterolDoxorubicinLipid BilayersMolecular Dynamics SimulationMolecular WeightThermodynamics1,2-DipalmitoylphosphatidylcholineCholesterolDoxorubicinLipid Bilayers

Identifiers

PMID21767490
PMCPMC3136772
OpenAlexW2115403287

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.