Evidence map›Paper›PMID 34021163›Full record

ArticleNPJ microgravity2021

Trabecular bone organoids: a micron-scale 'humanised' prototype designed to study the effects of microgravity and degeneration.

Alexandra Iordachescu, Erik A B Hughes, Stephan Joseph, Eric J Hill, Liam M Grover, Anthony D Metcalfe

Open access · goldAbstract read
In one paragraph

Article in NPJ microgravity, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
5.8field-weighted citation impact, top 3% 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

44 citing papers in PubMed, 72 citations in OpenAlex.

  1. Article
  2. Review
  3. Artificial intelligence virtual bone organoids (AIVBOs).Journal of orthopaedic translation · 2026
    Review
  4. Bone organoids and mitochondrial reprogramming.Journal of orthopaedic translation · 2026
    Review
  5. Review
  6. Review
  7. Review
  8. Review
  9. Review
  10. Review
  11. Review
  12. Article
  13. Bone organoid construction and evolution.Journal of orthopaedic translation · 2025
    Review
  14. Review
  15. Article
  16. Revolutionizing bone healing: the role of 3D models.Cell regeneration (London, England) · 2025
    Review
  17. Review
  18. 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

6 authors at 3 institutions in 1 country.

Alexandra IordachescuSchool of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK. a.iordachescu@bham.ac.uk.ORCID http://orcid.org/0000-0002-5973-6894
Erik A B HughesSchool of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK.
Stephan JosephSchool of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK.
Eric J HillSchool of Biosciences, College of Health and Life Sciences, Aston University, Birmingham, UK.ORCID http://orcid.org/0000-0002-9419-1500
Liam M GroverSchool of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK.
Anthony D MetcalfeSchool of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK.ORCID http://orcid.org/0000-0002-1633-6831
University of Birmingham · GBAston University · GBThe Edgbaston Hospital · GB

Funding

National Centre for the Replacement, Refinement and Reduction of Animals in Research NC/L001403/1National Centre for the Replacement Refinement and Reduction of Animals in Research (NC3Rs) NC/S001859/1
6 · The paper itself

Abstract

Bone is a highly responsive organ, which continuously adapts to the environment it is subjected to in order to withstand metabolic demands. These events are difficult to study in this particular tissue in vivo, due to its rigid, mineralised structure and inaccessibility of the cellular component located within. This manuscript presents the development of a micron-scale bone organoid prototype, a concept that can allow the study of bone processes at the cell-tissue interface. The model is constructed with a combination of primary female osteoblastic and osteoclastic cells, seeded onto femoral head micro-trabeculae, where they recapitulate relevant phenotypes and functions. Subsequently, constructs are inserted into a simulated microgravity bioreactor (NASA-Synthecon) to model a pathological state of reduced mechanical stimulation. In these constructs, we detected osteoclastic bone resorption sites, which were different in morphology in the simulated microgravity group compared to static controls. Once encapsulated in human fibrin and exposed to analogue microgravity for 5 days, masses of bone can be observed being lost from the initial structure, allowing to simulate the bone loss process further. Constructs can function as multicellular, organotypic units. Large osteocytic projections and tubular structures develop from the initial construct into the matrix at the millimetre scale. Micron-level fragments from the initial bone structure are detected travelling along these tubules and carried to sites distant from the native structure, where new matrix formation is initiated. We believe this model allows the study of fine-level physiological processes, which can shed light into pathological bone loss and imbalances in bone remodelling.

Identifiers

PMID34021163
PMCPMC8140135
OpenAlexW3162754667

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.