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  • Title: Treatment of diabetic microangiopathy and edema with total triterpenic fraction of Centella asiatica: a prospective, placebo-controlled randomized study.
    Author: Incandela L, Belcaro G, Cesarone MR, De Sanctis MT, Nargi E, Patricelli P, Bucci M.
    Journal: Angiology; 2001 Oct; 52 Suppl 2():S27-31. PubMed ID: 11666119.
    Abstract:
    The aim of this study was to demonstrate in a prospective, placebo-controlled, randomized study, whether total triterpenic fraction of Centella asiatica (TTFCA) is effective in improving the microcirculation in diabetic microangiopathy and neuropathy, Patients with severe diabetic microangiopathy, neuropathy, and edema; patients with microangiopathy without neuropathy; and healthy subjects were included. Microangiopathy was defined by laser Doppler and capillary filtration (rate on ankle swelling). Inclusion criteria were increase in resting flux and rate of ankle swelling; decrease in venoarteriolar response (VAR) and alteration in flux increase with temperature. Patients were randomized: the treatment group received TTFCA (tablets, 60 mg twice daily for 12 months); those in the placebo group received similar tablets. Healthy controls were followed up as a reference. Groups were comparable; there were no dropouts. There were no differences in the treatment and placebo groups at inclusion. Treatment was well tolerated; no side effects were reported. No variations were observed in normals at 12 months. In the neuropathy A-group, decreases (p<0.05) in RF and RAS were observed in the two treatment groups. The decrease in RAS was associated with a decrease in edema (p<0.05) in both treatment groups. The differences in flux (38%) and in VAR (38%) were associated with a decrease (28%) in the rate of ankle swelling (p<0.05). In patients without neuropathy (B-group) the decrease in flux was 22%, the VAR increased 22.7%, and the RAS decreased 9.5% at 12 months. The variations in normals and the progressive deterioration observed in untreated patients in both groups indicates the difference between treatment and placebo. In conclusion, the decrease in capillary filtration and edema is associated with symptomatic improvement. The action on edema is beneficial for the evolution of neuropathy. The effects of TTFCA on flux, RAS, and edema are important in early stages of microangiopathy to avoid progression to clinical stages.
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