Aims: To detect the level of serum syndecan-1 of patients with type 2 diabetes.

Methods: Subjects with diabetes were categorized into 4 subgroups, oral-agents, insulin therapy for 12 months. Serum syndecan-1 was detected by ELISA, and potential correlation between syndecan-1 levels and clinical characteristics was analyzed.

Results: Sixty-two diabetic patients and 20 healthy subjects (controls) were enrolled. Syndecan-1 in diabetic patients (24.616+/-1.993 ng/ml) was higher than that of the controls (18.907+/-2.638 ng/ml). The average concentration of syndecan-1 in the group of oral-agents, insulin therapy for 12 months was 19.157+/-2.556 ng/ml (n=20), 24.447+/-3.173 ng/ml (n=23), 35.005+/-4.749 ng/ml (n=11), and 27.593+/-8.304 ng/ml (n=8), respectively. An association between serum syndecan-1 and intake of exogenous insulin was found (r=0.266, p=0.035). Serum syndecan-1 of insulin-therapy group (27.811+/-2.669 ng/ml) enhanced significantly compared to that of the controls (p=0.030) and that of the oral-agents group (p=0.035). Syndecan-1 of the insulin therapy for 1-12 months group enhanced predominantly compared to that of the controls (p=0.005) and the oral-agents group (p=0.005).

Conclusions: Chronic inflammation and exogenous insulin usage increases serum syndecan-1 level. Exogenous insulin can promote shedding of syndecan-1 ectodomains to the serum in a time-dependent manner.

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http://dx.doi.org/10.1016/j.diabres.2009.08.002DOI Listing

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