# The role of vascular failure and biomechanical stress in the pathogenesis, healing and prevention of juvenile osteochondrosis dissecans

> **NIH NIH R56** · UNIVERSITY OF MINNESOTA · 2021 · $437,619

## Abstract

PROJECT SUMMARY/ABSTRACT
Juvenile ostechondritis dissecans (OCD) is a developmental orthopaedic disease affecting children and young
adults. It is characterized by formation of chondro-osseous flaps or fragments within joints which cause pain
and disability and also predispose to early onset osteoarthritis. Although recent studies demonstrated that
discrete areas of epiphyseal cartilage necrosis (termed osteochondrosis), caused by focal failure of vascular
supply, are the clinically silent precursor lesions of juvenile OCD, it remains unclear how the extent of the
inciting vascular failure, along with exposure to biomechanical trauma, determine whether these lesions heal or
progress to clinically apparent disease.
The overall objective of this proposal is to use porcine models to understand factors that influence the
development, progression and healing of juvenile OCD lesions. To achieve this objective, we will use three
specific aims to test our central hypothesis, that the degree of vascular compromise predicts the development
of juvenile OCD and lesion progression is influenced by biomechanical stress. Specifically, our aims have been
designed to determine (1) the relationship between the severity of vascular injury to the femoral trochlear
epiphyseal cartilage and the formation and progression of juvenile OCD precursor lesions in a miniature pig
model, (2) the role that low vs. high impact biomechanical stress plays in the progression of subclinical
osteochondrosis to clinically apparent juvenile OCD in miniature pigs, and (3) whether oral administration of
platelet inhibitors will decrease the high prevalence of naturally occurring juvenile OCD precursor lesions in
domestic pigs.
Our study will establish how the extent of vascular failure and exposure to biomechanical stress determine the
clinical course of juvenile OCD, and will supply proof of concept evidence that platelet inhibition reduces the
prevalence of subclinical osteochondrosis. Conducting these studies in a large animal model will ensure timely
translation of our results to inform clinical decision making in human patients, and will also help establish
controlled exercise as a component of non-operative treatment. Importantly, these findings will also have
applicability to other juvenile orthopaedic disorders of vascular origin such as Legg-Calvé-Perthes disease.

## Key facts

- **NIH application ID:** 10479243
- **Project number:** 1R56AR078209-01A1
- **Recipient organization:** UNIVERSITY OF MINNESOTA
- **Principal Investigator:** Ferenc Toth
- **Activity code:** R56 (R01, R21, SBIR, etc.)
- **Funding institute:** NIH
- **Fiscal year:** 2021
- **Award amount:** $437,619
- **Award type:** 1
- **Project period:** 2021-09-22 → 2023-12-31

## Primary source

NIH RePORTER: https://reporter.nih.gov/project-details/10479243

## Citation

> US National Institutes of Health, RePORTER application 10479243, The role of vascular failure and biomechanical stress in the pathogenesis, healing and prevention of juvenile osteochondrosis dissecans (1R56AR078209-01A1). Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/grant/nih/10479243. Licensed CC0.

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