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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Effect of cyclophosphamide on cytokines in patients with primary Sjögren's syndrome-associated interstitial lung disease in South China.
Rheumatology International 2013 June
The objective of the study is to investigate the mechanisms of cyclophosphamide sequential therapy for patient with primary Sjögren's syndrome-associated interstitial lung disease (PSS-ILD). This was a retrospective review of 15 patients (2005-2008) with PSS-ILD who underwent cyclophosphamide sequential therapy. Peripheral blood and bronchoalveolar lavage (BALF) were obtained before and 3, 6, 12 and 24 months after the treatment. The TNF-α and TGF-β1 mRNA levels in peripheral blood were measured using reverse transcription polymerase chain reaction. Serum and BALF TNF-α, TGF-β1 and MMP-9 levels were measured using sandwich enzyme-linked immunosorbent assay. The average levels of serum TNF-α (0.39 ± 0.22) and TGF-β1 (0.31 ± 0.18) mRNA in patients with PSS-ILD were higher compared with that in patients with PSS without ILD. TNF-α level (0.23 ± 0.19) was significantly decreased 3 months after cyclophosphamide treatment (t = 2.533, p < 0.05), and TGF-β1 (0.31 ± 0.18) level markedly decreased after 6 months of treatment (t = 2.617, p < 0.05). The levels of serum TNF-α (11.2 ± 2.6) μg/L, TGF-β1 (72 ± 19) μg/L and MMP-9 (38 ± 9) μg/L in patients with PSS-ILD were higher than that in patients with PSS without ILD. TGF-β1 (36 ± 12) μg/L level decreased significantly after 3 months of treatment (t = 2.526, p < 0.05), and TNF-α level (7.1 ± 1.3) μg/L markedly decreased after 6 months of therapy (t = 2.578, p < 0.05). MMP-9 level (18 ± 4) μg/L decreased significantly after 12-month treatment (t = 2.329, p < 0.05). The levels of BALF TNF-α (17.1 ± 3.5) μg/L, TGF-β1 (36 ± 17) μg/L and MMP-9 (27 ± 10) μg/L in patients with PSS-ILD were higher than that in patients with PSS without ILD. TGF-β1 (21 ± 14) μg/L level decreased significantly after 3-month treatment, and TNF-α level (9.4 ± 1.7) μg/L was decreased after 6 months of cyclophosphamide treatment that may be associated with its inhabitation on production of TNF-α, TGF-β1 and MMP-9.
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