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  • Title: Serum tumour necrosis factor-alpha is associated with poor health-related quality of life and depressive symptoms in patients with systemic lupus erythematosus.
    Author: Mak A, Tang CS, Ho RC.
    Journal: Lupus; 2013 Mar; 22(3):254-61. PubMed ID: 23334278.
    Abstract:
    OBJECTIVES: While patients with systemic lupus erythematosus (SLE) have poorer health-related quality of life (HRQoL) and are more depressed than healthy people, the impact of proinflammatory cytokines, particularly tumour necrosis factor-alpha (TNFα), on these unfavourable psychosocial parameters is unclear. We aim to explore potential relationships between lupus-related proinflammatory cytokines, HRQoL and depressive symptoms in patients with SLE. METHODS: Patients with SLE and age-matched healthy subjects were assessed for HRQoL and depressive and anxiety symptoms by the Short Form Health Survey-36 (SF-36) and Hospital Anxiety and Depression Scale (HADS) respectively. Using multiplex immunoassay, a panel of serum proinflammatory cytokines including TNFα, interleukin (IL)-1β, IL-6, IL-17, IL-23 and IL-33 were determined and compared between both groups. Independent associations between SF-36, serum proinflammatory cytokine levels and HADS scores were studied by regression models. RESULTS: In total, 54 patients and 54 healthy controls were studied. Lupus patients had significantly poorer HRQoL (p < 0.001) and were significantly more depressed (p = 0.006) and anxious (p = 0.022) than their healthy counterparts. Amongst the proinflammatory cytokines studied, serum TNFα was significantly higher in lupus patients (p < 0.001). After multivariate adjustment, higher serum TNFα (β = -0.224, p = 0.047) remained significantly associated with lower SF-36, along with smoking (β = -0.253, p = 0.014) and more severe depressive symptoms (β = -0.433, p = 0.002). In healthy subjects, serum TNFα was associated with depressive symptoms but not with SF-36. CONCLUSIONS: Higher serum TNFα level is independently associated with poorer HRQoL and more severe depressive symptoms in SLE patients. These associations suggest a potential impact of inflammatory response on depressive symptoms and the quality of life in patients with SLE.
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