SUBJECTS: Female Dark Agouti (DA) rats.
METHODS: Three different dosages of (2 mg/kg of body weight, 3 mg/kg of body weight and 4 mg/kg of body weight) collagen and complete Freund's adjuvant suspension were tested. After 45 days, serum C-reactive protein, TNF-α, superoxide dismutase and total glutathione assays were done. Radiographic and histopathological changes in the joints were compared.
RESULTS: All three groups showed signs of arthritic changes, confirmed by histopathological and radiographic changes. Severe arthritic changes were seen in the rats injected with 4 mg/kg of body weight of collagen. There was a significant increase in C-reactive protein, TNF-α, super oxide dismutase and total glutathione levels in the plasma in arthritis rats and the changes were more significant with 4 mg/kg of collagen.
CONCLUSION: These results demonstrated that the optimal dose to inject to experimental animals in order to get server arthritic changes was 4 mg/kg of collagen with complete Freund's adjuvant suspension. Severe arthritis changes induced significant elevation in plasma C-reactive protein and TNF-α levels.
METHODS: This was a cross-sectional survey using convenient sampling of 192 RA patients who attended the Rheumatology Clinic outpatient appointment, Hospital Melaka from June 2013 to December 2013. Depression, Anxiety and Stress Scale (DASS21) questionnaire was used to evaluate symptoms of depression, anxiety and stress. RA disease activity was assessed using the DAS28-ESR formula. Functional status was assessed via the Health Assessment Questionnaire Disability Index (HAQ-DI).
RESULTS: Out of 189 completed questionnaires, 46%(n=86) patients reported psychological distress symptoms, and 25%(n=48) experienced more than one negative emotional states. The prevalence of depression, anxiety and stress among our patients were 23.3%(n=44), 42.3%(n=80) and 20.1%(n=38) respectively. There were significant positive correlations (p<0.05) between these psychological symptoms with disease activity, number of tender joints, general health, pain and HAQ score. Age was inversely correlated with depression, anxiety and stress. Higher number of swollen joints correlated positively with depression but not with anxiety and stress. HAQ was the only independent predictor for depression (Odds Ratio [OR]=2.07; 95%CI: 1.19 to 3.61) and anxiety (OR=1.81; 95%CI: 1.1 to 3.0) whilst pain was found to be independent predictor for stress (OR=1.04; 95%CI: 1.0 to 1.1).
CONCLUSION: The incidence of depression and anxiety in our Malaysian sample of RA patient was comparable to that observed in Caucasian populations. Functional status was an independent predictor of depression and anxiety, whereas pain was an independent predictor of stress.