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  • Title: Plasma t-PA and PAI-1 antigen concentrations in non-insulin dependent diabetic patients: implication for diabetic retinopathy.
    Author: Cho YW, Yang DH, Oh DY, Baick SH, Kim SK, Kim SJ, Hong SY.
    Journal: Diabetes Res Clin Pract; 1994 Jan; 22(2-3):123-8. PubMed ID: 8200293.
    Abstract:
    Parameters of fibrinolysis, including basal plasma tissue type plasminogen activator (t-PA) and plasminogen activator inhibitor type 1 (PAI-1) antigen levels were studied in 49 non-insulin dependent diabetic patients (23 men, 26 women: ages 51.3 +/- 14.9 years) and 16 age matched non-diabetic subjects (9 men, 7 women ages 49.8 +/- 12.2 years) as a control group. Compared to a control group, the diabetic patients had a significantly higher mean plasma t-PA antigen (4.94 +/- 2.68 vs 3.20 +/- 2.30 ng/ml) and PAI-1 antigen (34.86 +/- 16.71 vs. 17.60 +/- 15.36 ng/ml) levels (P < 0.05). Significant univariate correlations were observed between t-PA and body mass index (BMI) (P = 0.0009, r = 0.7217), and PAI-1 were positively correlated with BMI and FBS (fasting blood sugar) in the total diabetic patients (P = 0.0003, r = 0.7217; P = 0.0477, r = 0.2858, respectively). In diabetic patients with proliferative diabetic retinopathy, both PAI-1 and t-PA antigen levels were significantly lower than those of diabetic patients with negative or background retinopathy (P = < 0.05). There were no significant differences of the plasma t-PA and PAI-1 levels between diabetic patients with micro- and macroproteinuria. This study conducted on non-insulin dependent diabetic patients suggests that they have significantly higher t-PA and PAI-1 antigen levels than do control subjects, and these findings appear to correlate negatively with proliferative retinopathy observed among the patients studied.
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