Evidence map›Paper›PMID 30167668›Full record

ArticleJournal of biomechanical engineering2019

Supraspinatus Tendons Have Different Mechanical Properties Across Sex.

K A Bonilla, A M Pardes, B R Freedman, L J Soslowsky

Abstract read
In one paragraph

Article in Journal of biomechanical engineering, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed, 32 citations in OpenAlex.

  1. Estrogen and Progesterone Exhibit Distinct Yet Coordinated Roles in the Regulation of Tendon Extracellular Matrix Remodeling.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2026
    Article
  2. Article
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  4. Tendon overuse models have different effects on tissue mechanical properties in ex vivo bovine tendons.Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology · 2025
    Article
  5. Article
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  7. Guidelines for ex vivo mechanical testing of tendon.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2023
    Review
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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

4 authors at 1 institution in 1 country.

K A BonillaMcKay Orthopaedic Laboratory, University of Pennsylvania, Philadelphia, PA 19104.
A M PardesMcKay Orthopaedic Laboratory, University of Pennsylvania, Philadelphia, PA 19104.
B R FreedmanMcKay Orthopaedic Laboratory, University of Pennsylvania, Philadelphia, PA 19104.
L J SoslowskyMcKay Orthopaedic Laboratory, University of Pennsylvania, Stemmler Hall, 3450 Hamilton Walk, Philadelphia, PA 19104 e-mail: .
University of Pennsylvania · US

Funding

Overall: Resource-based Center for Musculoskeletal Disorders Research (Overall Application)P30AR069619 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI LOUIS J SOSLOWSKY · 2016 to 2026
$9.1M
Training Program in Musculoskeletal ResearchT32AR007132 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI Robert L Mauck, LOUIS J SOSLOWSKY · 1986 to 2026
$4.9M
Challenging Treatment Paradigms for Achilles Tendon Ruptures in an Animal ModelR01AR064216 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI SOSLOWSKY, LOUIS J · 2013 to 2017
$1.9M
NIAMS NIH HHS P30 AR069619NIAMS NIH HHS R01 AR064216NIAMS NIH HHS T32 AR007132
6 · The paper itself

Abstract

Sex differences in the mechanical properties of different musculoskeletal tissues and their impact on tendon function and disease are becoming increasingly recognized. Tendon mechanical properties are influenced by the presence or absence of sex hormones and these effects appear to be tendon- or ligament-specific. The objective of this study was to determine how sex and hormone differences in rats affect supraspinatus tendon and muscle properties. We hypothesized that male supraspinatus tendons would have increased cross-sectional area but no differences in tendon material properties or muscle composition when compared to supraspinatus tendons from female or ovariectomized (OVX) female rats. Uninjured supraspinatus tendons and muscles from male, female, and OVX female rats were collected and mechanical and histological properties were determined. Our analysis demonstrated decreased dynamic modulus and increased hysteresis and cross-sectional area in male tendons. We found that male tendons exhibited decreased dynamic modulus (during low strain frequency sweep and high strain fatigue loading), increased hysteresis, and increased cross-sectional area compared to female and OVX female tendons. Despite robust mechanical differences, tendon cell density and shape, and muscle composition remained unchanged between groups. Interestingly, these differences were unique compared to previously reported sex differences in rat Achilles tendons, which further supports the concept that the effect of sex on tendon varies anatomically. These differences may partially provide a mechanistic explanation for the increased rate of acute supraspinatus tendon ruptures seen in young males.

Indexed as

Mechanical PhenomenaSex CharacteristicsAdultBiomechanical PhenomenaFemaleGonadal Steroid HormonesHumansMaleShoulderTendonsGonadal Steroid Hormones

Identifiers

PMID30167668
PMCPMC6298534
OpenAlexW2889241188

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.