Related Experiment Video
Updated: Aug 20, 2026
Software-Assisted Quantitative Measurement of Osteoarthritic Subchondral Bone Thickness
Published on: March 18, 2022
Cartilage debris increases the expression of chondrodestructive tumor necrosis factor-alpha by articular chondrocytes
Michelle Cameron-Donaldson1, Christoph Holland, David S Hungerford
1Department of Orthopaedic Surgery, Johns Hopkins University, O'Neill Laboratories, Division of Arthritis Surgery, Good Samaritan Hospital, Baltimore, Maryland 21239, USA.
Purpose:
To determine if cartilage particles increased the expression of TNF-alpha by articular chondrocytes.
Type Of Study:
In vitro experiment.
Methods:
Articular chondrocytes were obtained from patients undergoing primary total knee arthroplasty for osteoarthritis (n = 3) and from patients undergoing below-knee amputation for peripheral vascular disease (n = 3). Chondrocytes were then incubated with and without cartilage particles at a concentration of 5 microg/10(5) cells for 24 hours. TNF-alpha levels were then determined using reverse transcription polymerase chain reaction.
Results:
Both normal and osteoarthritic chondrocytes had low baseline expression of TNF-alpha under standard cell culture conditions. Expression was markedly increased in response to incubation with cartilage particles, and was statistically significant.
Conclusions:
Cartilage debris in the traumatized and osteoarthritic joint may increase the concentration of TNF-alpha in the joint, contributing to joint symptoms and cartilage destruction. Arthroscopic debridement and lavage may improve symptoms by washing these harmful components from the joint.
Level Of Evidence:
Level IV.
