ABSTRACT
Biocompatibility of a newly developed ethylenediamine modified poly (DL-latic acid) (EMPLA) with osteoblasts was investigated by means of cell morphology and cell proliferation. Films of PLA and EMPLA were made by solvent casting. Osteoblasts obtained from crania of neonatal Wistar rats were cultured on surfaces of PLA and EMPLA, with glass as control. The cell morphology was observed by phase contrast microscope and the cell proliferation was determined by MTT assay. The morphology observations revealed that the osteoblasts cultured on EMPLA spread wider than those on PLA, and much more cells were confluent on EMPLA, compared to those on PLA and glass. The growth curves showed the osteoblasts on EMPLA grew faster than did those on PLA and glass. The results exhibited that the biocompatibility of EMPLA with osteoblasts is better than that of PLA and glass, which suggested wide applications of EMPLA in biomedical area, especially in tissue engineering.
Subject(s)
Animals , Rats , Animals, Newborn , Biocompatible Materials , Chemistry , Pharmacology , Cell Proliferation , Cells, Cultured , Ethylenediamines , Chemistry , Pharmacology , Lactic Acid , Chemistry , Pharmacology , Materials Testing , Methods , Osteoblasts , Cell Biology , Polyesters , Polymers , Chemistry , Pharmacology , Rats, WistarABSTRACT
AIM: To observe the clinical effects of daniston danshentong c apsule in treatment of patients with nodular-cystic acne. METHODS: A group of patients (31 cases finished their observation in all 35 cases) wa s selected to take daniston danshentong capsule ( 0.25 g/capsule), 4 capsules three times daily. After continuous taking the agent for 8 weeks, the dosage ch anged to be 3 capsules three times daily. The treatment lasted for 12 weeks. RESULTS: The total effective rate was 83.9 %. Compared the mean number of the nodular-cystic acne before treatment (23?11) with that after 2 weeks of treatment (19?9), after 4 weeks (15?6), after 8 weeks (9?6), and aft er 12 weeks (7?7), all of the P values were less than 0.01 . The effective rate increased gradually along with administration time lengtheni ng. CONCLUSION: Daniston danshentong capsule is effective in tre atment of nodular-cystic acne, and eight-week course is a suitable for the tre atment.