Evidence map›Paper›PMID 33744432›Full record

ArticleOsteoarthritis and cartilage2021

The microbiome mediates epiphyseal bone loss and metabolomic changes after acute joint trauma in mice.

A K Hahn, C W Wallace, H D Welhaven, E Brooks, M McAlpine, B A Christiansen, S T Walk, R K June

Open access · greenAbstract read
In one paragraph

Article in Osteoarthritis and cartilage, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
1.6field-weighted citation impact, top 16% 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

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 29 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. The gut-joint axis in osteoarthritis.Nature reviews. Rheumatology · 2026
    Review
  5. Review
  6. Article
  7. Osteoarthritis as a systemic disease.Nature reviews. Rheumatology · 2026
    Review
  8. Review
  9. Article
  10. Review
  11. Article
  12. Review
  13. Article
  14. Review
  15. Review
  16. Article
  17. Germ-Free C57BL/6 Mice Have Increased Bone Mass and Altered Matrix Properties but Not Decreased Bone Fracture Resistance.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2023
    Article
  18. Article
  19. Article
  20. 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

8 authors at 4 institutions in 1 country.

A K HahnDepartment of Biological and Environmental Science, Carroll College, Helena, MT, 59625, USA.
C W WallaceMontana WWAMI, University of Washington School of Medicine, Seattle, WA, 98195, USA.
H D WelhavenDepartment of Biological and Environmental Science, Carroll College, Helena, MT, 59625, USA.
E BrooksDepartment of Chemical & Biological Engineering, Montana State University, Bozeman, MT, 59717, USA.
M McAlpineDepartment of Microbiology & Cell Biology, Montana State University, Bozeman, MT, 59717, USA.
B A ChristiansenDepartment of Orthopaedic Surgery, University of California Davis, Sacramento, CA, 95817, USA.
S T WalkDepartment of Microbiology & Cell Biology, Montana State University, Bozeman, MT, 59717, USA.
R K JuneDepartment of Microbiology & Cell Biology, Montana State University, Bozeman, MT, 59717, USA; Department of Mechanical & Industrial Engineering, Montana State University, Bozeman, MT, 59717, USA. Electronic address: rjune@me.montana.edu.
Montana State University · USCarroll College · USUniversity of California, Davis · USUniversity of Washington · US

Funding

Research Core (Developmental Research Project Program)P20GM103474 · NIGMS · MONTANA STATE UNIVERSITY - BOZEMAN · PI Jeffrey Good · 2012 to 2026
$60.0M
TISSUE ACQUISITION, MORPHOLOGY, AND CELL CULTUREP01AG007996 · NIA · UNIVERSITY OF CALIFORNIA SAN DIEGO · PI SAH, ROBERT L · 1989 to 2016
$26.0M
Modification of Post-Traumatic Osteoarthritis Progression with Joint UnloadingR01AR075013 · NIAMS · UNIVERSITY OF CALIFORNIA AT DAVIS · PI CHRISTIANSEN, BLAINE A. · 2020 to 2024
$2.7M
Role of Glucose metabolism in Chondrocyte MechanotransductionR01AR073964 · NIAMS · MONTANA STATE UNIVERSITY - BOZEMAN · PI JUNE, RONALD KENT · 2019 to 2024
$2.4M
NIAMS NIH HHS R01 AR073964NIAMS NIH HHS R01 AR075013NIA NIH HHS P01 AG007996NIGMS NIH HHS P20 GM103474
6 · The paper itself

Abstract

objectiveTo compare the early responses to joint injury in conventional and germ-free mice.

designPost-traumatic osteoarthritis (PTOA) was induced using a non-invasive anterior cruciate ligament rupture model in 20-week old germ-free (GF) and conventional C57BL/6 mice. Injury was induced in the left knees of n = 8 GF and n = 10 conventional mice. To examine the effects of injury, n = 5 GF and n = 9 conventional naïve control mice were used. Mice were euthanized 7 days post-injury, followed by synovial fluid recovery for global metabolomic profiling and analysis of epiphyseal trabecular bone by micro-computed tomography (μCT). Global metabolomic profiling assessed metabolic differences in the joint response to injury between GF and conventional mice. Magnitude of trabecular bone volume loss measured using μCT assessed early OA progression in GF and conventional mice.

resultsμCT found that GF mice had significantly less trabecular bone loss compared to conventional mice, indicating that the GF status was protective against early OA changes in bone structure. Global metabolomic profiling showed that conventional mice had greater variability in their metabolic response to injury, and a more distinct joint metabolome compared to their corresponding controls. Furthermore, differences in the response to injury in GF compared to conventional mice were linked to mouse metabolic pathways that regulate inflammation associated with the innate immune system.

conclusionsThese results suggest that the gut microbiota promote the development of PTOA during the acute phase following joint trauma possibly through the regulation of the innate immune system.

Indexed as

Cancellous BoneGastrointestinal MicrobiomeMetabolomicsAnimalsEpiphysesFemaleMaleMiceMice, Inbred C57BLOsteoarthritisInflammationJoint injuryMetabolomicsMicrobiomeOsteoarthritisSynovial fluid

Identifiers

PMID33744432
PMCPMC8693703
OpenAlexW3138482769

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.