Evidence map›Paper›PMID 12887734›Full record

ArticleBMC developmental biology2003

Reduced-folate carrier (RFC) is expressed in placenta and yolk sac, as well as in cells of the developing forebrain, hindbrain, neural tube, craniofacial region, eye, limb buds and heart.

Dennis M Maddox, Anna Manlapat, Penny Roon, Puttur Prasad, Vadivel Ganapathy, Sylvia B Smith

Open access · bronzeAbstract read
In one paragraph

Article in BMC developmental biology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
1.4field-weighted citation impact, top 21% 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

21 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Article
  3. Alteration of lens and retina textures from mice embryos with folic acid deficiency: image processing analysis.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2019
    Article
  4. Folic acid, one-carbon metabolism & childhood cancer.The Indian journal of medical research · 2017
    Review
  5. Review
  6. Article
  7. Review
  8. Article
  9. Article
  10. Genetic and epigenomic footprints of folate.Progress in molecular biology and translational science · 2012
    Review
  11. Review
  12. Article
  13. Article
  14. Regulation of folate receptor 1 gene expression in the visceral endoderm.Birth defects research. Part A, Clinical and molecular teratology · 2009
    Article
  15. Review
  16. Article
  17. Article
  18. Review
  19. Expression of folate pathway genes in the cartilage of Hoxd4 and Hoxc8 transgenic mice.Birth defects research. Part A, Clinical and molecular teratology · 2006
    Article
  20. 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

6 authors at 1 institution in 1 country.

Dennis M MaddoxDepartment of Cellular Biology and Anatomy, Medical College of Georgia, Augusta, USA. oxmandm@yahoo.com
Anna Manlapat
Penny Roon
Puttur Prasad
Vadivel Ganapathy
Sylvia B Smith
Augusta University · US

Funding

Role of homocysteine in retinal diseaseR01EY012830 · NEI · MEDICAL COLLEGE OF GEORGIA (MCG) · PI SMITH, SYLVIA B. · 2000 to 2016
$4.4M
PLACENTAL VITAMIN TRANSPORT-MOLECULAR &CELLULAR ASPECTSR01HD037150 · NICHD · MEDICAL COLLEGE OF GEORGIA (MCG) · PI PRASAD, PUTTUR D · 2000 to 2003
$788k
NEI NIH HHS EY 12830NEI NIH HHS R01 EY012830NICHD NIH HHS HD 37150-01NICHD NIH HHS R01 HD037150
6 · The paper itself

Abstract

backgroundFolate is essential for cellular proliferation and tissue regeneration. As mammalian cells cannot synthesize folates de novo, tightly regulated cellular uptake processes have evolved to sustain sufficient levels of intracellular tetrahydrofolate cofactors to support biosynthesis of purines, pyrimidines, and some amino acids (serine, methionine). Though reduced-folate carrier (RFC) is one of the major proteins mediating folate transport, knowledge of the developmental expression of RFC is lacking. We utilized in situ hybridization and immunolocalization to determine the developmental distribution of RFC message and protein, respectively.

resultsIn the mouse, RFC transcripts and protein are expressed in the E10.0 placenta and yolk sac. In the E9.0 to E11.5 mouse embryo RFC is widely detectable, with intense signal localized to cell populations in the neural tube, craniofacial region, limb buds and heart. During early development, RFC is expressed throughout the eye, but by E12.5, RFC protein becomes localized to the retinal pigment epithelium (RPE).

conclusionsClinical studies show a statistical decrease in the number of neural tube defects, craniofacial abnormalities, cardiovascular defects and limb abnormalities detected in offspring of female patients given supplementary folate during pregnancy. The mechanism, however, by which folate supplementation ameliorates the occurrence of developmental defects is unclear. The present work demonstrates that RFC is present in placenta and yolk sac and provides the first evidence that it is expressed in the neural tube, craniofacial region, limb buds and heart during organogenesis. These findings suggest that rapidly dividing cells in the developing neural tube, craniofacial region, limb buds and heart may be particularly susceptible to folate deficiency.

Indexed as

Membrane Transport ProteinsAnimalsCarrier ProteinsEmbryo, MammalianEyeFemaleHeartImmunohistochemistryLimb BudsMaleMiceMice, Inbred ICRMolecular Sequence DataNeural CrestPeptidesPigment Epithelium of EyeCarrier ProteinsMembrane Transport ProteinsPeptidesReduced Folate Carrier ProteinRNA, MessengerSlc19a1 protein, mouse

Identifiers

PMID12887734
PMCPMC184426
OpenAlexW1573300452

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.