Evidence map›Paper›PMID 31664714›Full record

ArticleClinical pharmacology and therapeutics2020

Protein Expression and Functional Relevance of Efflux and Uptake Drug Transporters at the Blood-Brain Barrier of Human Brain and Glioblastoma.

Xun Bao, Jianmei Wu, Youming Xie, Seongho Kim, Sharon Michelhaugh, Jun Jiang, Sandeep Mittal, Nader Sanai, Jing Li

Open access · greenAbstract read
In one paragraph

Article in Clinical pharmacology and therapeutics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed, 1 pooled it
4.1field-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

49 citing papers in PubMed, 1 synthesis or guideline pooled it, 87 citations in OpenAlex.

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  14. Microfabricated Organ-Specific Models of Tumor Microenvironments.Annual review of biomedical engineering · 2025
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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

9 authors at 2 institutions in 1 country.

Xun BaoKarmanos Cancer Institute, Wayne State University School of Medicine, Detroit, Michigan, USA.
Jianmei WuKarmanos Cancer Institute, Wayne State University School of Medicine, Detroit, Michigan, USA.
Youming XieKarmanos Cancer Institute, Wayne State University School of Medicine, Detroit, Michigan, USA.
Seongho KimKarmanos Cancer Institute, Wayne State University School of Medicine, Detroit, Michigan, USA.
Sharon MichelhaughDepartment of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, USA.
Jun JiangKarmanos Cancer Institute, Wayne State University School of Medicine, Detroit, Michigan, USA.
Sandeep MittalDepartment of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, USA.ORCID 0000-0001-6435-6821
Nader SanaiSt. Joseph's Hospital & Medical Center, Barrow Neurological Institute, Phoenix, Arizona, USA.
Jing LiKarmanos Cancer Institute, Wayne State University School of Medicine, Detroit, Michigan, USA.
Wayne State University · USBarrow Neurological Institute · US

Funding

Tumor Biology and Microenvironment (Program 1)P30CA022453 · NCI · WAYNE STATE UNIVERSITY · PI Julie Lynn Boerner · 1985 to 2026
$68.4M
NCI NIH HHS P30 CA022453
6 · The paper itself

Abstract

The knowledge of transporter protein expression and function at the human blood-brain barrier (BBB) is critical to prediction of drug BBB penetration and design of strategies for improving drug delivery to the brain or brain tumor. This study determined absolute transporter protein abundances in isolated microvessels of human normal brain (N = 30), glioblastoma (N = 47), rat (N = 10) and mouse brain (N = 10), and cell membranes of MDCKII cell lines, using targeted proteomics. In glioblastoma microvessels, efflux transporters (ABCB1 and ABCG2), monocarboxylate transporter 1 (MCT1), glucose transporter 1 (GLUT1), sodium-potassium pump (Na/K ATPase), and Claudin-5 protein levels were significantly reduced, while large neutral amino acid transporter 1 (LAT1) was increased and GLU3 remained the same, as compared with human normal brain microvessels. ABCC4, OATP1A2, OATP2B1, and OAT3 were undetectable in microvessels of both human brain and glioblastoma. Species difference in BBB transporter abundances was noted. Cellular permeability experiments and modeling simulations suggested that not a single apical uptake transporter but a vectorial transport system consisting of an apical uptake transporter and basolateral efflux mechanism was required for efficient delivery of poor transmembrane permeability drugs from the blood to brain.

Indexed as

AnimalsBlood-Brain BarrierBrainBrain NeoplasmsDogsDrug Delivery SystemsGlioblastomaHumansMadin Darby Canine Kidney CellsMaleMembrane Transport ProteinsMiceMice, Inbred BALB CMicrovesselsModels, BiologicalPermeabilityMembrane Transport Proteins

Identifiers

PMID31664714
PMCPMC7167337
OpenAlexW2982466751

What OpenQuestion holds

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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.