Alterations in compositional and cellular properties of the subchondral bone are linked to cartilage degeneration in hip osteoarthritis.
Osteoarthritis Cartilage
; 32(5): 535-547, 2024 May.
Article
em En
| MEDLINE
| ID: mdl-38403152
ABSTRACT
OBJECTIVE:
The subchondral bone is an emerging regulator of osteoarthritis (OA). However, knowledge of how specific subchondral alterations relate to cartilage degeneration remains incomplete.METHOD:
Femoral heads were obtained from 44 patients with primary OA during total hip arthroplasty and from 30 non-OA controls during autopsy. A multiscale assessment of the central subchondral bone region comprising histomorphometry, quantitative backscattered electron imaging, nanoindentation, and osteocyte lacunocanalicular network characterization was employed.RESULTS:
In hip OA, thickening of the subchondral bone coincided with a higher number of osteoblasts (controls 3.7 ± 4.5 mm-1, OA 16.4 ± 10.2 mm-1, age-adjusted mean difference 10.5 mm-1 [95% CI 4.7 to 16.4], p < 0.001) but a similar number of osteoclasts compared to controls (p = 0.150). Furthermore, higher matrix mineralization heterogeneity (CaWidth, controls 2.8 ± 0.2 wt%, OA 3.1 ± 0.3 wt%, age-adjusted mean difference 0.2 wt% [95% CI 0.1 to 0.4], p = 0.011) and lower tissue hardness (controls 0.69 ± 0.06 GPa, OA 0.67 ± 0.06 GPa, age-adjusted mean difference -0.05 GPa [95% CI -0.09 to -0.01], p = 0.032) were detected. While no evidence of altered osteocytic perilacunar/canalicular remodeling in terms of fewer osteocyte canaliculi was found in OA, specimens with advanced cartilage degeneration showed a higher number of osteocyte canaliculi and larger lacunocanalicular network area compared to those with low-grade cartilage degeneration. Multiple linear regression models indicated that several subchondral bone properties, especially osteoblast and osteocyte parameters, were closely related to cartilage degeneration (R2 adjusted = 0.561, p < 0.001).CONCLUSION:
Subchondral bone properties in OA are affected at the compositional, mechanical, and cellular levels. Based on their strong interaction with cartilage degeneration, targeting osteoblasts/osteocytes may be a promising therapeutic OA approach. DATA AND MATERIALSAVAILABILITY:
All data are available in the main text or the supplementary materials.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Osteoartrite do Quadril
/
Cartilagem Articular
/
Doenças das Cartilagens
Limite:
Humans
Idioma:
En
Revista:
Osteoarthritis Cartilage
Assunto da revista:
ORTOPEDIA
/
REUMATOLOGIA
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Alemanha