RESUMEN
Objective:to study the absorption and absorption characteristics of isomer of propranolol hydrochloride in Caco-2cell monolayers model,which have taken as the most representative model to investigate the absorption mechanism of oral drug in recent years. Methods:Caco-2 cell monolayers model was set up to study transport of isomer of propranolol hydrochloride. RP-HPLC method was applied to analyze isomer of propranolol hydrochloride through precolumn derivatization. Results: Propranolol hydrochloride was absorbed completely,and was a passive diffusion mechanism. There was no chiral selectivity of transport and absorption of them across Caco-2 cell monolayers. Conclusion: Caco-2 cell model was established and the cell integrity was evaluated. The integrity of Caco-2 cell was in good condition,which could be used to study the absorption and transport. RP-HPLC method was established to separated isomer of propranolol hydrochloride within 20 min by precolumn derivatization. The method is convenient, sensitive,accurate and suitable for the analysis of telbivudine.
RESUMEN
0, 999. Determing whether the d-or 1-isomer of MP are present in urine will helpdetermint the source of MP. In this case,the concentration of d-MP is about 11 and 10 times higherthan 1-MP in urine and liver, respectively. The results suggest that the person from whom thesamples were obtained probably had aceess to MP from an illicit source.