Evidence map›Paper›PMID 29986308›Full record

ArticleThe Journal of nutritional biochemistry2018

Down-regulation of placental folate transporters in intrauterine growth restriction.

Yi-Yung Chen, Madhulika B Gupta, Rob Grattton, Theresa L Powell, Thomas Jansson

Abstract read
In one paragraph

Article in The Journal of nutritional biochemistry, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
2.4field-weighted citation impact, top 12% 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

15 citing papers in PubMed, 33 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Review
  9. Review
  10. Review
  11. Review
  12. Fetal Growth Restriction.Journal of obstetrics and gynaecology of India · 2020
    Review
  13. Review
  14. Review
  15. Review
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

5 authors at 3 institutions in 3 countries.

Yi-Yung ChenDepartment of Obstetrics & Gynecology, University of Colorado Anschutz Medical Campus Aurora, CO, USA; Division of High-risk Pregnancy, Department of Obstetrics & Gynecology, Mackay Memorial Hospital, Taipei, Taiwan. Electronic address: chenyy.0204@gmail.com.
Madhulika B GuptaChildren's Health Research Institute, University of Western Ontario, London, ON, Canada; Department of Pediatrics and Biochemistry, University of Western Ontario, London, ON, Canada. Electronic address: mbgupta@uwo.ca.
Rob GratttonDepartment of Obstetrics and Gynecology, University of Western Ontario, London, ON, Canada. Electronic address: Rob.Gratton@lhsc.on.ca.
Theresa L PowellDepartment of Obstetrics & Gynecology, University of Colorado Anschutz Medical Campus Aurora, CO, USA; Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA. Electronic address: Theresa.powell@ucdenver.edu.
Thomas JanssonDepartment of Obstetrics & Gynecology, University of Colorado Anschutz Medical Campus Aurora, CO, USA. Electronic address: thomas.jansson@ucdenver.edu.
University of Colorado Anschutz Medical Campus · USWestern University · CAMackay Memorial Hospital · TW

Funding

mTOR as a trophoblast folate sensorR01HD078376 · NICHD · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI JANSSON, THOMAS · 2014 to 2018
$1.6M
NICHD NIH HHS R01 HD078376
6 · The paper itself

Abstract

Folate deficiency in pregnancy is associated with neural tube defects, restricted fetal growth and fetal programming of diseases later in life. Fetal folate availability is dependent on maternal folate levels and placental folate transport capacity, mediated by two key transporters, Folate Receptor-α and Reduced Folate Carrier (RFC). We tested the hypothesis that intrauterine growth restriction (IUGR) is associated with decreased folate transporter expression and activity in isolated syncytiotrophoblast microvillous plasma membranes (MVM). Women with pregnancies complicated by IUGR (birth weight <3rd percentile, mean birth weight 1804±110 g, gestational age 35.7±0.61 weeks, n=25) and women delivering an appropriately-for gestational age infant (control group, birth weight 25th-75th centile, mean birth weight 2493±216 g, gestational age 33.9±0.95 weeks, n=19) were recruited and placentas were collected at delivery. MVM was isolated and folate transporter protein expression was measured using Western blot and transporter activity was determined using radiolabelled methyltetrahydrofolic acid and rapid filtration. Whereas the expression of FR-α was unaffected, MVM RFC protein expression was significantly decreased in the IUGR group (-34%, P<.05). IUGR MVM had a significantly lower folate uptake compared to the control group (-38%, P<.05). In conclusion, placental folate transport capacity is decreased in IUGR, which may contribute to the restricted fetal growth and intrauterine programming of childhood and adult disease. These findings suggest that continuation of folate supplementation in the second and third trimester is of particular importance in pregnancies complicated by IUGR.

Indexed as

AdultBirth WeightCase-Control StudiesCell MembraneDown-RegulationFemaleFetal Growth RetardationFolate Receptor 1HumansInfant, NewbornMicrovilliPlacentaPregnancyReduced Folate Carrier ProteinTetrahydrofolatesTrophoblasts5-methyltetrahydrofolateFolate Receptor 1FOLR1 protein, humanReduced Folate Carrier ProteinSLC19A1 protein, humanTetrahydrofolatesFetal growthFolic acidHumanMaternal-fetal exchangeMethyl donorsTrophoblast

Identifiers

PMID29986308
PMCPMC6129407
OpenAlexW2807758243

What OpenQuestion holds

Textmetadata
LicenceTDM
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.