[Tongxinluo improves vascular endothelial function in patients with type 2 diabetes].

ABSTRACT

OBJECTIVE: To investigate the effects of Tongxinluo on vascular endothelial function in patients with type 2 diabetes. METHODS: A total of 80 patients with type 2 diabetes were recruited and divided into two groups Tongxinluo therapy group (n = 40) and conventional therapy group (n = 40). Plasma levels of NO, ET, 6-keto-PGF1alpha and TXB2 and diastolic functions of humeral arteries (measured by high-resolution ultrasound) were measured at baseline and 4 weeks later. RESULTS: The flow-mediated dilation was significantly increased from (8.19 +/- 0.71)% to (12.47 +/- 0.98)% (P < 0.05) in Tongxinluo therapy group after 4 weeks therapy compare to baseline level. Their plasma NO was significantly increased [(47.65 +/- 4.38) pg/ml to (52.91 +/- 4.83) pg/ml, P < 0.001] and plasma ET significantly reduced [(31.23 +/- 2.46) pg/ml to (24.34 +/- 2.46) pg/ml, P < 0.001] post 4 week Tongxinluo therapy. Parameters remained unchanged in the placebo group (P > 0.05) at baseline and 4 weeks later. Non-flow-mediated dilation was unaffected by Tongxinluo therapy. CONCLUSIONS: Tongxinluo improved the vascular endothelial dependent diastolic function in patients with type 2 diabetes by regulating the balance of plasma NO/ET.