Automated Indentation Demonstrates Structural Stiffness of Femoral Articular Cartilage and Temporomandibular Joint Mandibular Condylar Cartilage Is Altered in FgF2KO Mice
| Autor: | Paige S. Woods, Marja M. Hurley, Liping Xiao, Tannin A. Schmidt, Alyssa A. Morin, Po-Jung Chen, Sarah Mahonski, Sumit Yadav |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Cartilage
Articular Knee Joint Biomedical Engineering Physical Therapy Sports Therapy and Rehabilitation Articular cartilage Fibroblast growth factor Condyle 03 medical and health sciences Mice 0302 clinical medicine Indentation Immunology and Allergy Medicine Animals Femur Clinical Research papers 030304 developmental biology 030203 arthritis & rheumatology Orthodontics 0303 health sciences Temporomandibular Joint business.industry Cartilage Mandibular Condyle Stiffness Temporomandibular joint body regions medicine.anatomical_structure Female medicine.symptom business |
| Zdroj: | Cartilage |
| Popis: | Objective Employ an automated indentation technique, using a commercially available machine, to assess the effect of fibroblast growth factor 2 (FGF2) expression on structural stiffness over the surface of both murine femoral articular cartilage (AC) and temporomandibular joint (TMJ) mandibular condylar cartilage (MCC). Design Experiments were performed using 3-month-old female homozygote Fgf2KO mice with wild type (WT) littermates. After euthanization, isolated mandibles and hindlimbs were either processed for histology or subjected to automated indentation on a Biomomentum Mach-1 v500csst with a 3-axis motion controller in a phosphate buffered saline bath using a 0.3 mm spherical tip indenter. The effect of indentation depth on normal force was characterized, then structural stiffness was calculated and mapped at multiple positions on the AC and MCC. Results Automated indentation of the AC and TMJ MCC was successfully completed and was able to demonstrate both regional variation in structural stiffness and differences between WT and Fgf2KO mice. Structural stiffness values for Fgf2KO AC were significantly smaller than WT at both the medial/anterior ( P < 0.05) and medial/posterior ( P < 0.05) positions. Global Fgf2KO also lead to a decrease in MCC thickness of the TMJ compared with WT ( P < 0.05) and increased structural stiffness values for Fgf2KO at both the posterior and anterior location ( P < 0.05). Conclusions Automated indentation spatially resolved differences in structural stiffness between WT and Fgf2KO tissue, demonstrating FGF2 expression affects femoral AC and TMJ MCC. This quantitative method will provide a valuable approach for functional characterization of cartilage tissues in murine models relevant to knee joint and TMJ health and disease. |
| Databáze: | OpenAIRE |
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