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Updated: Nov 16, 2025

Destabilization of the Medial Meniscus and Cartilage Scratch Murine Model of Accelerated Osteoarthritis

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Human engineered meniscus transcriptome after short-term combined hypoxia and dynamic compression.

Alexander Ra Szojka¹, Rita de Cássia Marqueti^1,2, David Xinzheyang Li^1,3

¹Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada.

Journal of Tissue Engineering

|February 22, 2021

Summary

Short-term hypoxia and dynamic compression promote matrix formation in meniscus fibrochondrocytes. This combined treatment supports hyaline cartilage development and matrix remodeling in knee joint tissues.

Keywords:

Human engineered meniscus dynamic compression hypoxia mechanical loading transcriptome

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A Microfluidic Platform for Stimulating Chondrocytes with Dynamic Compression

A Microfluidic Platform for Stimulating Chondrocytes with Dynamic Compression

Published on: September 13, 2019

Area of Science:

Biomedical Engineering
Tissue Engineering
Molecular Biology

Background:

Meniscus fibrochondrocytes (MFCs) in the knee joint experience low oxygen and mechanical loading.
Understanding cellular responses to these stimuli is crucial for inner meniscus tissue regeneration.

Purpose of the Study:

To investigate the transcriptome response of human MFCs to combined low oxygen and mechanical loading.
To determine if this treatment promotes a matrix-forming phenotype for inner meniscus tissue formation.

Main Methods:

Human MFCs cultured on collagen scaffolds for 6 weeks under normoxic conditions with TGF-β3.
Treated with delayed hypoxia (3% O2 for 24h) followed by dynamic compression (30-40% strain for 5 min).
Transcriptome analysis to assess gene expression changes.

Main Results:

Delayed hypoxia induced anabolic and anti-catabolic gene expression for hyaline cartilage matrix markers.
Dynamic compression triggered inflammatory matrix remodeling and upregulated SOX9 and COL1A1.
41 genes were commonly regulated by both hypoxia and dynamic compression.

Conclusions:

The combined treatment uniquely modulated gene expression, favoring hyaline cartilage characteristics.
This approach supports both matrix formation and matrix remodeling in engineered meniscus tissue.
Findings provide insights into strategies for inner meniscus tissue engineering.