Evidence map›Paper›PMID 32816992›Full record

ArticleThe Journal of biological chemistry2020

Avian eggshell formation reveals a new paradigm for vertebrate mineralization via vesicular amorphous calcium carbonate.

Lilian Stapane, Nathalie Le Roy, Jacky Ezagal, Alejandro B Rodriguez-Navarro, Valérie Labas, Lucie Combes-Soia, Maxwell T Hincke, Joël Gautron

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

24 citing papers in PubMed, 50 citations in OpenAlex.

  1. Article
  2. Article
  3. Optimizing eggshell quality in extended laying periods: Insights and strategies.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2026
    Review
  4. Article
  5. Review
  6. Research Progress on Genetic Factors of Poultry Egg Quality: A Review.Animals : an open access journal from MDPI · 2025
    Review
  7. Article
  8. Review
  9. Article
  10. Bio-Informed Porous Mineral-Based Composites.Small (Weinheim an der Bergstrasse, Germany) · 2025
    Review
  11. Article
  12. Article
  13. Microbially Induced Calcium Carbonate Precipitation byApplied and environmental microbiology · 2023
    Review
  14. Evidence for heterothermic endothermy and reptile-like eggshell mineralization inProceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  15. Article
  16. Article
  17. Review
  18. Article
  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 3 countries.

Lilian StapaneBOA INRAe, Université de Tours, Nouzilly, France.
Nathalie Le RoyBOA INRAe, Université de Tours, Nouzilly, France.
Jacky EzagalBOA INRAe, Université de Tours, Nouzilly, France.
Alejandro B Rodriguez-NavarroDepartmento de Mineralogia y Petrologia, Universidad de Granada, Granada, Spain.
Valérie LabasUnité Mixte de Recherches Physiologie de la Reproduction et des Comportements, Université de Tours IFCE, Nouzilly, France.
Lucie Combes-SoiaUnité Mixte de Recherches Physiologie de la Reproduction et des Comportements, Université de Tours IFCE, Nouzilly, France.
Maxwell T HinckeDepartment of Innovation in Medical Education, and Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada.
Joël GautronBOA INRAe, Université de Tours, Nouzilly, France. Electronic address: joel.gautron@inrae.fr.
Université de Tours · FRUniversidad de Granada · ESUniversity of Ottawa · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Amorphous calcium carbonate (ACC) is an unstable mineral phase, which is progressively transformed into aragonite or calcite in biomineralization of marine invertebrate shells or avian eggshells, respectively. We have previously proposed a model of vesicular transport to provide stabilized ACC in chicken uterine fluid where eggshell mineralization takes place. Herein, we report further experimental support for this model. We confirmed the presence of extracellular vesicles (EVs) using transmission EM and showed high levels of mRNA of vesicular markers in the oviduct segments where eggshell mineralization occurs. We also demonstrate that EVs contain ACC in uterine fluid using spectroscopic analysis. Moreover, proteomics and immunofluorescence confirmed the presence of major vesicular, mineralization-specific and eggshell matrix proteins in the uterus and in purified EVs. We propose a comprehensive role for EVs in eggshell mineralization, in which annexins transfer calcium into vesicles and carbonic anhydrase 4 catalyzes the formation of bicarbonate ions (HCO[Formula: see text]), for accumulation of ACC in vesicles. We hypothesize that ACC is stabilized by ovalbumin and/or lysozyme or additional vesicle proteins identified in this study. Finally, EDIL3 and MFGE8 are proposed to serve as guidance molecules to target EVs to the mineralization site. We therefore report for the first-time experimental evidence for the components of vesicular transport to supply ACC in a vertebrate model of biomineralization.

Indexed as

Calcification, PhysiologicAnimalsAvian ProteinsCalcium CarbonateChickensEgg ShellExtracellular Matrix ProteinsExtracellular VesiclesFemaleAvian ProteinsCalcium CarbonateExtracellular Matrix ProteinsACC transportavian eggshellbiomineralizationBiomineralizationcalcium-binding proteincalcium transportextracellular matrix proteinextracellular vesicleextracellular vesiclesmatrix proteinsprotein targeting

Identifiers

PMID32816992
PMCPMC7681030
OpenAlexW3057851659

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.