Abstract
In this study the aim was to evaluate the intrathecal sICAM-1 production in multiple sclerosis (MS) patients during relapse and remission. In addition to this, we assessed whether there is a correlation between intrathecal sICAM-1 production and other disease activity markers such as IgG index and gadolinium enhancement in magnetic resonance imaging (MRI). Twenty four relapsing-remitting MS patients were included in the study. Serum and cerebrospinal fluid (CSF) samples were obtained both during relapse and remission. The soluble form of ICAM (sICAM) was measured by the ELISA method in serum and CSF. Cranial MRI with triple dose gadolinium injection was performed for each patient both during relapse and remission. Serum levels of sICAM-1 (245.23 +/- 92.88 ng/ml) were higher during relapse than those in remission (219.90 +/- 110.94 ng/ml), but the difference was not statistically significant. In relapse periods CSF levels of sICAM-1 (1.304 +/- 0.92 ng/ml) were higher than those in remission (1.06 +/- 0.86 ng/ml), but this was not significant. However, during relapse periods patients had significantly higher sICAM-1 index values (1.76 +/- 0.60) than those found during remission periods (1.01 +/- 0.44) (p < 0.05). The IgG index values were higher in relapse periods than in remission (0.88 +/- 0.37 vs. 0.67 +/- 0.28) (p < 0.005). On T1 weighted images following triple dose Gd injection, at least two or more enhancing lesions were present in 22/24 of the patients (91%) in relapse and 4/24 of the patients (19%) in remission. There was strong correlation both between the sICAM-1 index and Gd enhancement (r =0 .72 p < 0.05) and sICAM-1 index and IgG index in relapse (r = 0.69 p < 0.05). In conclusion, there is association between high sICAM-1 and IgG indices, as well as between high sICAM-1 index and Gd enhancing MRI lesions in relapsing MS patients.
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