Bone Metabolism Imbalance in Inflammatory Arthritis and Its Reversal
Author Information
Author(s): Zwerina Jochen, Tuerk Birgit, Redlich Kurt, Smolen Josef S, Schett Georg
Primary Institution: Medical University of Vienna
Hypothesis
The study investigates the imbalance of bone metabolism in inflammatory arthritis and the effects of tumor necrosis factor blockade.
Conclusion
Blocking tumor necrosis factor reverses the negative balance of bone turnover in inflammatory arthritis, leading to increased osteoblast numbers and decreased osteoclast numbers.
Supporting Evidence
- Bone resorption was significantly higher than bone formation in subchondral bone erosions.
- Anti-TNF treatment reduced the area of bone erosions from 6330 µm2 to 450 µm2.
- After TNF blockade, osteoblast numbers increased by 1600% in subchondral bone erosions.
Takeaway
When people have arthritis, their bones can break down too much. A special treatment can help fix this by making new bone cells.
Methodology
The study used a histological technique to analyze bone turnover in transgenic mice with arthritis, comparing treated and untreated groups.
Limitations
The study did not assess long-term effects of TNF blockade on bone metabolism.
Participant Demographics
Heterozygous hTNFtg mice (strain Tg197; genetic background, C57BL/6) were used in the study.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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