ABSTRACT
Objective To establish a simple and sensitive method for the determination of plasma drug concentration in rats after intragastrical and intravenous administration of paclitaxel loaded nanoparticles and to evaluate its pharmacokinetic characteristics .Methods AgilentTC-C18 column (250 mm × 4 .6 mm ,5 μm) was used for HPLC at the flow rate 1 ml/min with ketoconazole as internal standard and methanol acetonitrile water (45:20:35) as the mobile phase .The statistical mo-ment method was applied to calculate the pharmacokinetic parameters and to evaluate pharmacokinetic characteristics .Results There was a good liner relationship (r=0 .9997) when rat blood concentration of Paclitaxel ranged from 0 .5 to 20μg /ml .The accuracy and precision were in line with the requirements of biological sample analysis .The t1/2 were 3.86 ,3.76 ,3.35 and 2 .62 h after intravenous injection of three lab-made paclitaxel nanoparticles and paclitaxel solution via rat tail vein .The t1/2 were 5 .28 and 3 .72 h respectively after intragastrical administration of lab-made paclitaxel nanoparticles and paclitaxel suspen-sion .Conclusion This method can be used for the pharmacokinetic study of paclitaxel nanoparticles in rats .The paclitaxel loaded nanoparticles exhibited significantly longer in vivo retention time than paclitaxel injection and paclitaxel suspension .
ABSTRACT
Objective To investigate the Histiostomas apromyzarum breeding in traditional Chinese medicine Rhizoma Bletillae. Methods The scurf and dust of R. bletillae were obtained by brushing,and the mites samples were separated and identified. Results Totally 520 g samples were collected,and 56 adult mites(female?male ratio 0.12)and 18 dormant bodies were obtained from the samples,and they were identified as H. apromyzarum with an average breeding density of 0.14/g. Con?clusion H. apromyzarum could breed on the traditional Chinese medicine R. bletillae,and the corresponding control mea?sures should be strengthened.
ABSTRACT
Objective To study the effects of compound rhizoma bletillae paint (CRBP) on scalded rats. Methods Rats were randomly divided into test groups (CRBP low, high dose group), CRBP-CA (CRBP without chlorhexidine acetate) group, positive control group (Jingwanhong) and negative control group (no treatment) respectively, with 10 rats in each group. The drugs were administered topically on the surface of scalded places respectively after second-degree and third-degree burn scald models in rats. The rats were bred separately. The scabbing time, decrustation time and wound healing time were recorded. Results The scabbed and the decrustation time were shorter in the test group than that in the negative control group with significant differences (P