Abstract
Forty-three patients with systemic scleroderma (SSc), 10 with non-SSc (6 cases of systemic lupus erythematosus and 4 cases of dermatomyositis), 14 cases of mild- or non-sclerotic type of scleroderma with capillaroscopic abnormalities of nailfolds (SSD; scleroderma spectrum disorders) and 10 healthy volunteers (HC) were subjected to examination of plasma levels of endothelin-1 (ET-1). The sex ratios (male/female) in the patients with SSc, non-SSc and HC were 7:36, 4:6 and 0:10, and the ranges of their ages were 22-74, 19-78 and 33-62 years old, respectively. The plasma levels of ET-1 in SSD, SSc (Barnett I;15), SSc (Barnett II;16), SSc (Barnett III;12 cases), non-SSc and HC were 1.67 +/- 0.37 2.04 +/- 0.58 2.04 +/- 0.68 1.85 +/- 041 191 +/- 0.7 and 1.31 +/- 0.34 pg/ml, respectively, confirming previous results from other laboratories. The plasma levels of ET-1 statistically differ between each collagen disease (SSD, SSc and non-SSc) and HC using Student's t-test (P < 0.05). Although a statistically significant difference was obtained in the plasma levels of ET-1 between the SSc group (6 cases) and HC (6 cases) measured at 06:00, 12:00, 18:00 and 24:00 h, there was no significant circadian variation of plasma levels of ET-1 at th...Continue Reading
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