Study on tissue distribution and pharmacokinetics of moxifloxacin in the urogenital system by orally administration with single dose in rats / 重庆医学

ABSTRACT

Objective To explore the pharmacokinetics and tissue distribution in rats with a single dose by orally administra‐tion of moxifloxacin .Methods Totally 60 rats were equally divided into 10 groups with orally administration moxifloxacin for 50 mg/kg .The lungs ,uterus ,ovaries (tube) ,kidney ,ureter and bladder tissues were collected at different time points (before give med‐icine and after 0 .25 ,0 .50 ,1 .00 ,2 .00 ,3 .00 ,4 .00 ,6 .00 ,8 .00 ,12 .00 ,24 .00 h) .The concentrations of moxifloxacin in tissues were determined by the established HPLC method and the pharmacokinetic parameters were calculated by 3p97 .Results The established HPLC methods had good specificities ,and the linear range was between 0 .001 6-50 .000 0μg/mL for tissue sample .T1/2βof moxi‐floxacin were (13 .65 ± 3 .56) ,(12 .64 ± 2 .86) ,(13 .27 ± 3 .51) ,(13 .47 ± 3 .29) ,(14 .78 ± 2 .64) ,(11 .56 ± 1 .58)h in lung ,uterus , ureterine adnexa ,kidney ,ureter and bladder ;Cmax of moxifloxac in various tissues were (15 .61 ± 3 .58) ,(12 .48 ± 4 .57) ,(16 .18 ± 4 .21) ,(12 .65 ± 3 .17) ,(26 .68 ± 7 .42) ,(1 .13 ± 0 .58)μg/mL ;Tmax of moxifloxac in above tissues were (3 .15 ± 1 .24) ,(2 .66 ± 1 .74) ,(2 .97 ± 1 .65) ,(2 .58 ± 1 .36) ,(3 .47 ± 1 .84) ,(2 .46 ± 1 .87)h;AUC0 -t of moxifloxac in above tissues were (87 .2 ± 5 .41) , (70 .89 ± 4 .56) ,(92 .41 ± 7 .65) ,(88 .26 ± 6 .94) ,(170 .59 ± 21 .48) ,(14 .57 ± 5 .47)μg · h-1 · mL -1 .Conclusion Moxifloxacin had a higher concentration in ureterine adnexa and ureter by orally administration with single dose ,and it can maintain for a long time .