Acta Medica Iranica 2009. 47(2):97-102.

Assessment of Serum Thrombomodulin in Patients with Systemic Lupus Erythematosus in Rheumatology Research Center
Mahmood Akbarian, Farhad Gharibdoost, Mehrzad Hadjaliloo, Abdolhadi Nadji, Ahmad Reza Jamshidi, Farhad Shahram, Masoomeh Akhlaghi, Shahrzad Khosravi, Simin Almasi, Fereydoun Davatchi

Abstract


At present, some clinical presentations and serological parameters such as products of complement activation and elevation of autoantibodies (e.g. dsDNA antibodies), erythrocyte sedimentation rate (ESR), levels of C-reactive protein (CRP), or cytokines such as IL-2/IL-2 receptor, IL-6 and IL-10 are used as indirect serological markers with variable degrees of significance. To date, no specific serological parameter is available to assess disease activity in SLE. Soluble serum thrombomodulin is a new marker of endothelial cell injury and vasculitis. The objective of this study was to determine in vivo soluble thrombomodulin as a marker of disease activity in SLE pa-tients and compare serum thrombomodulin in SEL patients with and without renal involvement and inactive SLE patients. Sixty-four patients fulfilling ACR criteria with proven SLE with differ-ent disease activities were tested for serum levels of Thrombomodulin and dsDNA by ELISA. C3, C4 and FANA were also measured by standard laboratory tests. The clinical disease activity was evaluated by the Systemic Lupus Erythematosus Activity Index (SLEDAI). Elevated soluble thrombomodulin had significant correlations with an increased ANA level (P= 0.037), decrease level of C3 (P =0.017), increase of SLEDAI (P=0.003) and strongly associated with renal in-volvement in SLE. Thrombomodulin level and Anti dsDNA in active patients with and without re-nal disease were higher than inactive patients. In SLE, serum thrombomodulin seems to be impor-tant marker for evaluation of disease activity.


Keywords


Systemic Lupus Erythematosus; Thrombomodulin; SLE disease Activity

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