Evidence map›Paper›PMID 18394593›Full record

ArticleBrain research2008

Development of ascorbate transporters in brain cortical capillary endothelial cells in culture.

Huan Qiao, James M May

Open access · greenAbstract read
In one paragraph

Article in Brain research, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
3.6field-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

25 citing papers in PubMed, 38 citations in OpenAlex.

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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

2 authors at 1 institution in 1 country.

Huan QiaoDepartment of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232-0475, USA.
James M May
Vanderbilt University · US

Funding

ASCORBIC ACID FUNCTION AND METABOLISMR01DK050435 · NIDDK · VANDERBILT UNIVERSITY MEDICAL CENTER · PI MAY, JAMES M. · 1995 to 2015
$4.0M
NIDDK NIH HHS DK 50435NIDDK NIH HHS R01 DK050435
6 · The paper itself

Abstract

Ascorbic acid in its reduced form is not transported across the capillary endothelial cell blood-brain barrier. This is thought to be due to absence of the SVCT2, a specific transporter for ascorbate. To assess this directly we prepared primary cultures of mouse cortical microvascular endothelial cells. When still in the capillaries, these cells did not express the SVCT2 protein as assessed by immunocytochemistry and by immunoblotting. However, during several days in culture, they developed SVCT2 expression and showed ascorbate transport rates comparable to those in immortalized endothelial cell lines. SVCT2 expression was inversely proportional to cell density, was enhanced by culture at low physiologic plasma ascorbate concentrations, was inhibited by ascorbate concentrations expected in the brain interstitium, and was stimulated by cobalt ions. Expression of the SVCT2 was associated with ascorbate-dependent maturation and release of type IV collagen by the cells in culture. Although the SVCT2 is induced by culture of cortical capillary endothelial cells, its absence in vivo remains perplexing, given the need for intracellular ascorbate to facilitate type IV collagen maturation and release by endothelial cells.

Indexed as

Analysis of VarianceAnimalsAscorbic AcidCells, CulturedCerebral CortexCollagen Type IVDose-Response Relationship, DrugEndothelial CellsGene Expression RegulationMiceMice, Inbred C57BLOrganic Anion Transporters, Sodium-DependentSodium-Coupled Vitamin C TransportersSymportersAscorbic AcidCollagen Type IVOrganic Anion Transporters, Sodium-DependentSlc23a2 protein, mouseSodium-Coupled Vitamin C TransportersSymporters

Identifiers

PMID18394593
PMCPMC2453688
OpenAlexW1993023886

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.