Evidence map›Paper›PMID 25675910›Full record

ReviewThe Journal of membrane biology2015

Permeability of the Blood-Brain Barrier: Molecular Mechanism of Transport of Drugs and Physiologically Important Compounds.

Clifford W Fong

Abstract readReview
PubMed Publisher
In one paragraph

Review in The Journal of membrane biology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

61 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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1 more citing papers are in PubMed but not listed here.

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

1 author.

Clifford W FongEigenenergy, Adelaide, SA, Australia, cwfong@internode.on.net.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A new molecular model for the permeability of drugs and other physiologically important compounds to cross the blood-brain barrier has been developed. Permeability (log PS) is dependant on desolvation, lipophilicity, molecular volume and dipole moment. Previous models for BBB permeability have not considered desolvation and dipole moment as critical factors. The model applies to passive diffusion processes, and some facilitated diffusion processes. Passive permeability models may not apply to active transport processes, where complex membrane protein binding processes (e.g. stereoselectivity) are involved. Model phosphatidylcholine lipid bilayer membranes have been used to evaluate how charged or polar neutral compounds can interact through their molecular dipoles with the cell membrane to induce electromechanical changes in the cell membrane which facilitate permeation. The free energy of solvation in n-octanol has been shown to be a good measure of membrane lipophilicity by calculating the solvation free energy of a model PC lipid membrane in a series of closely related alcohols. The passive diffusion model for alcohols correlates with the known modulation of membrane bilayers which showed a size-dependent "cut-off" point in potency. For most drugs and related molecules, the neutral species are the permeating species.

Indexed as

Blood-Brain BarrierCell Membrane PermeabilityLipid BilayersModels, BiologicalModels, ChemicalAnimalsBiological Transport, ActiveHumansPermeabilityPhosphatidylcholinesLipid BilayersPhosphatidylcholines

Identifiers

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.