Evidence map›Paper›PMID 20133672›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2010

Placental-specific Igf2 knockout mice exhibit hypocalcemia and adaptive changes in placental calcium transport.

M R Dilworth, L C Kusinski, E Cowley, B S Ward, S M Husain, M Constância, C P Sibley, J D Glazier

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
8.6field-weighted citation impact, top 2% 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

34 citing papers in PubMed, 87 citations in OpenAlex.

  1. Trial
  2. The Molecular Biology of Placental Transport of Calcium to the Human Foetus.International journal of molecular sciences · 2025
    Review
  3. Review
  4. Review
  5. Article
  6. Parental obesity-induced changes in developmental programming.Frontiers in cell and developmental biology · 2022
    Review
  7. Review
  8. Article
  9. Antenatal sildenafil citrate treatment increases offspring blood pressure in the placental-specificAmerican journal of physiology. Heart and circulatory physiology · 2020
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Treating the dysfunctional placenta.The Journal of endocrinology · 2017
    Review
  19. 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

8 authors at 3 institutions in 1 country.

M R DilworthMaternal and Fetal Health Research Group, University ofManchester, Manchester, UK. m.r.dilworth@manchester.ac.uk
L C Kusinski
E Cowley
B S Ward
S M Husain
M Constância
C P Sibley
J D Glazier
Queen Mary University of London · GBUniversity of Cambridge · GBUniversity of Manchester · GB

Funding

Biotechnology and Biological Sciences Research Council BB/B50118X/1Biotechnology and Biological Sciences Research Council BB/B50118X/2Biotechnology and Biological Sciences Research Council S18929Medical Research CouncilWellcome TrustWellcome Trust 076026/Z/04/Z
6 · The paper itself

Abstract

Evidence is emerging that the ability of the placenta to supply nutrients to the developing fetus adapts according to fetal demand. To examine this adaptation further, we tested the hypothesis that placental maternofetal transport of calcium adapts according to fetal calcium requirements. We used a mouse model of fetal growth restriction, the placental-specific Igf2 knockout (P0) mouse, shown previously to transiently adapt placental System-A amino acid transporter activity relative to fetal growth. Fetal and placental weights in P0 mice were reduced when compared with WT at both embryonic day 17 (E17) and E19. Ionized calcium concentration [Ca(2+)] was significantly lower in P0 fetal blood compared with both WT and maternal blood at E17 and E19, reflecting a reversal of the fetomaternal [Ca(2+)] gradient. Fetal calcium content was reduced in P0 mice at E17 but not at E19. Unidirectional maternofetal calcium clearance ((Ca) K (mf)) was not different between WT and P0 at E17 but increased in P0 at E19. Expression of the intracellular calcium-binding protein calbindin-D(9K), previously shown to be rate-limiting for calcium transport, was increased in P0 relative to WT placentas between E17 and E19. These data show an increased placental transport of calcium from E17 to E19 in P0 compared to WT. We suggest that this is an adaptation in response to the reduced fetal calcium accumulation earlier in gestation and speculate that the ability of the placenta to adapt its supply capacity according to fetal demand may stretch across other essential nutrients.

Indexed as

Maternal-Fetal ExchangeAnimalsCalciumDisease Models, AnimalFemaleFetal Growth RetardationFetusHypocalcemiaInsulin-Like Growth Factor IIIon TransportMaleMiceMice, Inbred C57BLMice, KnockoutPlacentaPregnancyCalciumIGF2 protein, mouseInsulin-Like Growth Factor II

Identifiers

PMID20133672
PMCPMC2840526
OpenAlexW2124267346

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.