Evidence map›Paper›PMID 19264887›Full record

ArticleInvestigative ophthalmology & visual science2009

Maturation of the fetal human choriocapillaris.

Takayuki Baba, Rhonda Grebe, Takuya Hasegawa, Imran Bhutto, Carol Merges, D Scott McLeod, Gerard A Lutty

Open access · greenAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
3.8field-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

27 citing papers in PubMed, 44 citations in OpenAlex.

  1. Article
  2. Review
  3. Review
  4. Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Bruch's Membrane and the Choroid in Age-Related Macular Degeneration.Advances in experimental medicine and biology · 2021
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Retinal Vasculature in Development and Diseases.Annual review of vision science · 2018
    Review
  15. Article
  16. Review
  17. Review
  18. Albumen Transport to Bruch's Membrane and RPE by Choriocapillaris Caveolae.Investigative ophthalmology & visual science · 2016
    Article
  19. Article
  20. VEGF 165 b in the developing vasculatures of the fetal human eye.Developmental dynamics : an official publication of the American Association of Anatomists · 2012
    Article
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

7 authors at 1 institution in 1 country.

Takayuki BabaWilmer Ophthalmological Institute, Johns Hopkins Hospital, Baltimore, Maryland 21287-9115, USA.
Rhonda Grebe
Takuya Hasegawa
Imran Bhutto
Carol Merges
D Scott McLeod
Gerard A Lutty
Johns Hopkins Hospital · US

Funding

Wilmer Core Grant for Vision ResearchP30EY001765 · NEI · JOHNS HOPKINS UNIVERSITY · PI Malia Michelle Edwards · 1985 to 2026
$22.1M
Inflammatory cells of choroid: a therapeutic target in AMD.R01EY016151 · NEI · JOHNS HOPKINS UNIVERSITY · PI EDWARDS, MALIA MICHELLE · 2006 to 2024
$8.0M
NEI NIH HHS EY016151NEI NIH HHS EY01765NEI NIH HHS P30 EY001765NEI NIH HHS R01 EY016151
6 · The paper itself

Abstract

purposeThe purpose of this study was to examine the structural and functional maturation of the choriocapillaris (CC) and to determine when fenestrations form, the capillaries are invested with pericytes, and the endothelial cells (ECs) became functional.

methodsImmunohistochemistry was performed on cryopreserved sections of embryonic/fetal human eyes from 7 to 22 weeks' gestation (WG), using antibodies against PAL-E, PV-1 (fenestrations), carbonic anhydrase IV (CA IV), eNOS, and alpha-smooth muscle actin (alphaSMA) and NG2 (two pericyte markers) and the EC marker (CD31). Alkaline phosphatase (APase) enzymatic activity was demonstrated by enzyme histochemistry. Transmission electron microscopy (TEM) was performed on eyes at 11, 14, 16, and 22 WG. Adult human eyes were used as the positive control.

resultsAll EC markers were present in the CC by 7 WG. PAL-E, CA IV, and eNOS immunoreactivities and APase activity were present in the CC by 7 to 9 WG. TEM analysis demonstrated how structurally immature this vasculature was, even at 11 WG: no basement membrane, absence of pericytes, and poorly formed lumens that were filled with filopodia. The few fenestrations that were observed were often present within the luminal space in the filopodia. Contiguous fenestrations and significant PV-1 were not observed until 21 to 22 WG. alphaSMA was prominent at 22 WG, and the maturation of pericytes was confirmed by TEM.

conclusionsIt appears that ECs and their precursors express enzymes present in adult CC well before they are structurally mature. Although ECs make tight junctions early in development, contiguous fenestrations and mature pericytes occur much later in development.

Indexed as

ActinsAgedAlkaline PhosphataseAntigensBiomarkersCapillariesCarbonic Anhydrase IVChondroitin Sulfate Proteoglycan 4ChoroidEndothelium, VascularFemaleGestational AgeHumansImmunoenzyme TechniquesMaleMiddle AgedACTA2 protein, humanActinsAlkaline PhosphataseAntigensBiomarkersCarbonic Anhydrase IVChondroitin Sulfate Proteoglycan 4Nitric Oxide Synthase Type IIIPlatelet Endothelial Cell Adhesion Molecule-1Proteoglycans

Identifiers

PMID19264887
PMCPMC4941237
OpenAlexW2092973678

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.