Cytokines and Knee Osteoarthritis: Understanding Pain and Function
Author Information
Author(s): Orita Sumihisa, Koshi Takana, Mitsuka Takeshi, Miyagi Masayuki, Inoue Gen, Arai Gen, Ishikawa Tetsuhiro, Hanaoka Eiji, Yamashita Keishi, Yamashita Masaomi, Eguchi Yawara, Toyone Tomoaki, Takahashi Kazuhisa, Ohtori Seiji
Primary Institution: Chiba Rosai Hospital, Chiba, Japan
Hypothesis
Are proinflammatory cytokines in the synovial fluid associated with radiographic grading and pain-related scores in knee osteoarthritis patients?
Conclusion
The study found that proinflammatory cytokines are correlated with radiographic grades and pain scores in knee osteoarthritis patients.
Supporting Evidence
- TNFα and IL-6 were detectable in knee synovial fluid, while NGF was not.
- TNFα did not correlate with KL grade, but IL-6 had a significant negative correlation.
- TNFα was significantly correlated with WOMAC scores, while IL-6 was only weakly correlated with stiffness.
Takeaway
This study looked at how certain proteins in the knee fluid relate to pain and joint damage in people with knee arthritis. It found that some proteins are linked to more pain and worse joint function.
Methodology
Synovial fluid was collected from 47 knee osteoarthritis patients, and levels of TNFα, IL-6, and NGF were measured using ELISA. Radiographic grading was done using the Kellgren-Lawrence scale, and pain/function was assessed using the WOMAC index.
Potential Biases
Potential bias due to exclusion of patients with prior treatments or other orthopedic diseases.
Limitations
The study did not examine gene expression of cytokines, and the KL grading system may have affected results.
Participant Demographics
The study included 50 patients (22 males, 28 females) with an average age of 70 years.
Statistical Information
P-Value
0.025
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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