Evidence map›Paper›PMID 25797646›Full record

ArticleThe American journal of pathology2015

Targeted deletion of collagen V in tendons and ligaments results in a classic Ehlers-Danlos syndrome joint phenotype.

Mei Sun, Brianne K Connizzo, Sheila M Adams, Benjamin R Freedman, Richard J Wenstrup, Louis J Soslowsky, David E Birk

Open access · bronzeAbstract read
In one paragraph

Article in The American journal of pathology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 1 pooled it
4.4field-weighted citation impact, top 5% 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

47 citing papers in PubMed, 1 synthesis or guideline pooled it, 65 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Collagen III Deficiency Following Injury in Female Murine Tendons Alters Matrix Composition, Structure, Organization and Function.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2026
    Article
  5. Article
  6. Developmental, but not Homeostatic, Collagen V Expression Regulates Mature Murine Supraspinatus Tendon Structure, Function, and Gene Expression.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2026
    Article
  7. Review
  8. Article
  9. Review
  10. Loss ofMatrix biology plus · 2025
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Collagen VI in the Musculoskeletal System.International journal of molecular sciences · 2023
    Review
  17. Article
  18. Advanced Gene Therapy Strategies for the Repair of ACL Injuries.International journal of molecular sciences · 2022
    Review
  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

7 authors at 3 institutions in 1 country.

Mei SunDepartment of Molecular Pharmacology & Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida.
Brianne K ConnizzoMcKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania.
Sheila M AdamsDepartment of Molecular Pharmacology & Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida.
Benjamin R FreedmanMcKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania.
Richard J WenstrupMyriad Genetic Laboratories, Salt Lake City, Utah.
Louis J SoslowskyMcKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania.
David E BirkDepartment of Molecular Pharmacology & Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida. Electronic address: dbirk@health.usf.edu.
University of Pennsylvania · USUniversity of South Florida · USMyriad Genetics · US

Funding

The Role of Hyaluronic Acid Receptors in Tendon HealingP30AR050950 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI PIGNOLO, ROBERT JOHN · 2006 to 2015
$6.2M
Regulated Assembly of the Tendon Extracellular MatrixR01AR044745 · NIAMS · UNIVERSITY OF SOUTH FLORIDA · PI BIRK, DAVID E · 1997 to 2016
$5.0M
Injury Response in Normal and EDS Tendons: Regulatory Roles of Collagen VR01AR065995 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI BIRK, DAVID E, SOSLOWSKY, LOUIS J · 2014 to 2018
$1.8M
NIAMS NIH HHS AR044745NIAMS NIH HHS AR065995NIAMS NIH HHS P30 AR050950NIAMS NIH HHS R01 AR044745NIAMS NIH HHS R01 AR065995
6 · The paper itself

Abstract

Collagen V mutations underlie classic Ehlers-Danlos syndrome, and joint hypermobility is an important clinical manifestation. We define the function of collagen V in tendons and ligaments, as well as the role of alterations in collagen V expression in the pathobiology in classic Ehlers-Danlos syndrome. A conditional Col5a1(flox/flox) mouse model was bred with Scleraxis-Cre mice to create a targeted tendon and ligament Col5a1-null mouse model, Col5a1(Δten/Δten). Targeting was specific, resulting in collagen V-null tendons and ligaments. Col5a1(Δten/Δten) mice demonstrated decreased body size, grip weakness, abnormal gait, joint laxity, and early-onset osteoarthritis. These gross changes were associated with abnormal fiber organization, as well as altered collagen fibril structure with increased fibril diameters and decreased fibril number that was more severe in a major joint stabilizing ligament, the anterior cruciate ligament (ACL), than in the flexor digitorum longus tendon. The ACL also had a higher collagen V content than did the flexor digitorum longus tendon. The collagen V-null ACL and flexor digitorum longus tendon both had significant alterations in mechanical properties, with ACL exhibiting more severe changes. The data demonstrate critical differential regulatory roles for collagen V in tendon and ligament structure and function and suggest that collagen V regulatory dysfunction is associated with an abnormal joint phenotype, similar to the hypermobility phenotype in classic Ehlers-Danlos syndrome.

Indexed as

AnimalsBiomechanical PhenomenaCollagen Type VDisease Models, AnimalEhlers-Danlos SyndromeGaitHand StrengthImmunoblottingImmunohistochemistryJointsLigamentsMiceMice, KnockoutMicroscopy, Electron, TransmissionPhenotypeReal-Time Polymerase Chain ReactionCollagen Type V

Identifiers

PMID25797646
PMCPMC4419209
OpenAlexW2054944028

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.