Objectives: A non-clinical study was performed to establish a LC-MS/MS method to determine the in vivo active components of doxorubicin hydrochloride liposome injection in the plasma of Sprague-Dawley rats. Methods: T...Objectives: A non-clinical study was performed to establish a LC-MS/MS method to determine the in vivo active components of doxorubicin hydrochloride liposome injection in the plasma of Sprague-Dawley rats. Methods: Ten male SD rats were administered tail vein with a single dose of 10 mg/kg, and the concentrations of doxorubicin hydrochloride in plasma, heart, liver, spleen, lung, and kidney were determined by liquid chromatography-tandem mass spectrometry, and the pharmacokinetic parameters were calculated. Results: The final concentration of doxorubicin hydrochloride ranged from 500 ng/mL to 250,000 ng/mL, and the lower limit of quantification was 500 ng/mL;the main pharmacokinetic parameters: T<sub>1/2</sub> was (19.282 ± 10.305) h, C<sub>max</sub> was (118514.828 ± 26155.134) ng/mL, AUC<sub>0-24</sub> and AUC<sub>0-∞</sub> were (1216659.205 ± 192706.268) ng/mL⋅h and (2082244.523 ± 860139.487) ng/mL⋅h, MRT<sub>0-24</sub> and MRT<sub>0-∞</sub> were (9.237 ± 0.423) h and (26.52 ± 14.015) h, respectively, and clearance (CL) was (0.005 ± 0.002) mL/h⋅ng. Conclusions: The method is simple, rapid, and sensitive, which can be used for the determination of doxorubicin hydrochloride concentration in the plasma of SD rats and pharmacokinetic non-clinical studies.展开更多
A randomized, two-way, crossover study was conducted in 12 fasting, healthy, algerian volunteers to compare the bioavailability of two brands of metformin hydrochloride 850 mg coated tablets. The present study aimed t...A randomized, two-way, crossover study was conducted in 12 fasting, healthy, algerian volunteers to compare the bioavailability of two brands of metformin hydrochloride 850 mg coated tablets. The present study aimed to appreciate the bioequivalence of the generic product and to evaluate the intra-subject variability of this active substance in the Algerian population. The test brand was compared to Glucophage （Merck UK） as the reference product. The study was performed at the bioequivalence center of the national control laboratory for pharmaceuticals products from 03 to 04, 2011, in joint venture with specialized medical hospital center of E1 Hadi Flici, Algiers, Algeria. The drug was administered with 200 mL of water after a 10 h overnight fasting on two treatment days separated by one week washout period. After dosing, serial blood samples were collected for a period of 12 h. A reliable, simple, and robust liquid chromatography-tandem mass spectro-metric （LC-MS/MS） method has been developed and validated for estimation of metformin in human plasma using propranolol as internal standard. The analytes were extracted from plasma by using the protein precipitation extraction technique. The assay was found to be linear over the range of 50-3000 ng/mL with a lower limit of quantitation of 50 ng/mL. Various pharmacokinetic parameters including AUC0-t, AUC0-∞, Cmax, Tmax, and T1/2 were determined from plasma concentrations of both formulations and found to be in good agreement with reported values. The pharmacokinetical and statistical analysis was conducted with Kinetica 4.4.1. AUC0-t, AUC0-∞ and Cmax were tested for bioequivalence after log-transformation of data. No significant difference was found based on ANOVA; 90% confidence interval （[91.62 %, 115.66%] for AUC0-t, [92.07 %, 115.53 %] for AUC0-∞; [94.58%, 119.58 %] for Cmax） of test/reference ratio for these parameters were found within bioequivalence acceptance range of 80-125%. Based on these statistical inferences, it was concluded that Metformin hydrochloride test is bioequivalent to Glucophage.展开更多
本试验制备了载盐酸曲美他嗪(1)的2种缓释制剂,分别是采用湿法制粒制备的缓释片剂和基于缓释包衣微丸的胶囊剂,后者是将采用离心造粒法制备的1缓释包衣微丸灌装而得。以体外释放度为指标,利用星点设计-效应面法优化了微丸包衣材料中Eudr...本试验制备了载盐酸曲美他嗪(1)的2种缓释制剂,分别是采用湿法制粒制备的缓释片剂和基于缓释包衣微丸的胶囊剂,后者是将采用离心造粒法制备的1缓释包衣微丸灌装而得。以体外释放度为指标,利用星点设计-效应面法优化了微丸包衣材料中Eudragit NE 30D与羟丙甲纤维素的比例及包衣增重。以原研1缓释片(Vasorel MR)为参比,对比了2种自制缓释剂型在水、0.1 mol/L盐酸、p H 4.5乙酸盐缓冲液和p H 6.8磷酸盐缓冲液中释放曲线的相似性。结果显示,2种自制品与原研缓释片在4种介质中的释放行为相似。Beagle犬体内药动学研究结果显示,1缓释片和缓释胶囊相对于原研1缓释片的口服生物利用度为(96.8±15.9)%和(101.5±16.7)%。展开更多
文摘Objectives: A non-clinical study was performed to establish a LC-MS/MS method to determine the in vivo active components of doxorubicin hydrochloride liposome injection in the plasma of Sprague-Dawley rats. Methods: Ten male SD rats were administered tail vein with a single dose of 10 mg/kg, and the concentrations of doxorubicin hydrochloride in plasma, heart, liver, spleen, lung, and kidney were determined by liquid chromatography-tandem mass spectrometry, and the pharmacokinetic parameters were calculated. Results: The final concentration of doxorubicin hydrochloride ranged from 500 ng/mL to 250,000 ng/mL, and the lower limit of quantification was 500 ng/mL;the main pharmacokinetic parameters: T<sub>1/2</sub> was (19.282 ± 10.305) h, C<sub>max</sub> was (118514.828 ± 26155.134) ng/mL, AUC<sub>0-24</sub> and AUC<sub>0-∞</sub> were (1216659.205 ± 192706.268) ng/mL⋅h and (2082244.523 ± 860139.487) ng/mL⋅h, MRT<sub>0-24</sub> and MRT<sub>0-∞</sub> were (9.237 ± 0.423) h and (26.52 ± 14.015) h, respectively, and clearance (CL) was (0.005 ± 0.002) mL/h⋅ng. Conclusions: The method is simple, rapid, and sensitive, which can be used for the determination of doxorubicin hydrochloride concentration in the plasma of SD rats and pharmacokinetic non-clinical studies.
文摘A randomized, two-way, crossover study was conducted in 12 fasting, healthy, algerian volunteers to compare the bioavailability of two brands of metformin hydrochloride 850 mg coated tablets. The present study aimed to appreciate the bioequivalence of the generic product and to evaluate the intra-subject variability of this active substance in the Algerian population. The test brand was compared to Glucophage （Merck UK） as the reference product. The study was performed at the bioequivalence center of the national control laboratory for pharmaceuticals products from 03 to 04, 2011, in joint venture with specialized medical hospital center of E1 Hadi Flici, Algiers, Algeria. The drug was administered with 200 mL of water after a 10 h overnight fasting on two treatment days separated by one week washout period. After dosing, serial blood samples were collected for a period of 12 h. A reliable, simple, and robust liquid chromatography-tandem mass spectro-metric （LC-MS/MS） method has been developed and validated for estimation of metformin in human plasma using propranolol as internal standard. The analytes were extracted from plasma by using the protein precipitation extraction technique. The assay was found to be linear over the range of 50-3000 ng/mL with a lower limit of quantitation of 50 ng/mL. Various pharmacokinetic parameters including AUC0-t, AUC0-∞, Cmax, Tmax, and T1/2 were determined from plasma concentrations of both formulations and found to be in good agreement with reported values. The pharmacokinetical and statistical analysis was conducted with Kinetica 4.4.1. AUC0-t, AUC0-∞ and Cmax were tested for bioequivalence after log-transformation of data. No significant difference was found based on ANOVA; 90% confidence interval （[91.62 %, 115.66%] for AUC0-t, [92.07 %, 115.53 %] for AUC0-∞; [94.58%, 119.58 %] for Cmax） of test/reference ratio for these parameters were found within bioequivalence acceptance range of 80-125%. Based on these statistical inferences, it was concluded that Metformin hydrochloride test is bioequivalent to Glucophage.
文摘本试验制备了载盐酸曲美他嗪(1)的2种缓释制剂,分别是采用湿法制粒制备的缓释片剂和基于缓释包衣微丸的胶囊剂,后者是将采用离心造粒法制备的1缓释包衣微丸灌装而得。以体外释放度为指标,利用星点设计-效应面法优化了微丸包衣材料中Eudragit NE 30D与羟丙甲纤维素的比例及包衣增重。以原研1缓释片(Vasorel MR)为参比,对比了2种自制缓释剂型在水、0.1 mol/L盐酸、p H 4.5乙酸盐缓冲液和p H 6.8磷酸盐缓冲液中释放曲线的相似性。结果显示,2种自制品与原研缓释片在4种介质中的释放行为相似。Beagle犬体内药动学研究结果显示,1缓释片和缓释胶囊相对于原研1缓释片的口服生物利用度为(96.8±15.9)%和(101.5±16.7)%。
