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Abstract
Carpal tunnel syndrome (CTS) is the most common peripheral nerve entrapment, causing pain, impairment, and disability. To identify proteins of CTS comprehensively, a comparative serum analysis of CTS patients and normal control subjects was performed. The two-dimensional electrophoresis patterns of serum obtained from six CTS patients and six normal control subjects were compared. We found 10 proteins that were significantly altered in the serum of CTS patients, among which four were upregulated and six were downregulated. The upregulated spots were identified as Chain A, heat shock 70-kDa protein, 42-kDa ATPase N-terminal domain; glutathione-insulin transhydrogenase (216AA); cAMP-dependent protein kinase inhibitor alpha; and mutant β-globin. The downregulated spots were identified as vitamin D-binding protein (VDBP), fibrinogen gamma chain, apolipoprotein A-IV (ApoA-IV), clusterin, heterogeneous nuclear ribonucleoprotein H1 (hnRNP H1), and one unidentified protein. The information obtained from this proteomic analysis will be very useful in understanding the pathophysiology of CTS and in finding suitable proteins that can serve as new diagnostic biomarkers of CTS.