Objective To study the pharmacokinetics of a novel recombinant human granulocyte colonystimulating factor (rhG-CSFa) in rats and to determine the proteolytic rates of rhG-CSFa in the whole blood and serum of rats in v...Objective To study the pharmacokinetics of a novel recombinant human granulocyte colonystimulating factor (rhG-CSFa) in rats and to determine the proteolytic rates of rhG-CSFa in the whole blood and serum of rats in vitro. Methods The pharmacokinetics of rhG-CSFa and conventional (wild type,WT) granulocyte colonystimulating factor (G-CSF) were investigated in Sprague-Dawley rats which received either intravenous or subcutaneous injection of rhG-CSFa or WT G-CSF at three different doses (20,50,or 100 μg/kg). The blood samples of rats were collected at multiple time points (from 0.08 to 12 h) and the concentrations of rhG-CSFa and WT G-CSF in serum were determined with a sandwich enzyme-linked immunosorbent assay (ELISA). For the study of proteolytic rates in vitro,the concentrations of rhG-CSFa or WT G-CSF were determined at 3-minute intervals after addition of the respective drug to rat’s whole blood or serum. Results Pharmacokinetic analysis of serum rhG-CSFa or WT G-CSF levels indicated that,at each dose tested,for either route of drug administration,the area under concentration-time curve values and the maximum serum concentration of rhG-CSFa were higher than those of WT G-CSF,and the serum half life of rhG-CSFa was longer than that of WT G-CSF. Subsequent in vitro whole blood and serum stability study showed that the rates of drug degradation in WT G-CSF were 1.8 folds and 1.5 folds higher than those in rhG-CSFa,respectively. Conclusion rhG-CSFa has better serum and whole blood stability in vitro and higher bioavailability in vivo as compared to WT G-CSF.展开更多
目的探讨初级与次级预防性使用聚乙二醇化重组人粒细胞集落刺激因子(pegylated recombinant human granulocyte colony-stimulating factor,PEG-rhG-CSF)在卵巢癌初始肿瘤细胞减灭术后化疗的价值。方法2019年1月~2020年6月我院76例卵巢...目的探讨初级与次级预防性使用聚乙二醇化重组人粒细胞集落刺激因子(pegylated recombinant human granulocyte colony-stimulating factor,PEG-rhG-CSF)在卵巢癌初始肿瘤细胞减灭术后化疗的价值。方法2019年1月~2020年6月我院76例卵巢癌初始肿瘤细胞减灭术后行紫杉醇和卡铂联合化疗,根据初次预防性使用PEG-rhG-CSF分为初级预防组(n=49)和次级预防组(n=27),比较2组中性粒细胞减少发生率、需要补充重组人粒细胞集落刺激因子(recombinant human granulocyte colony-stimulating factor,rhG-CSF)率、中性粒细胞减少相关重复住院率、中性粒细胞减少相关化疗周期延迟发生率等。结果第一、二疗程中,初级预防组3、4度中性粒细胞减少发生率分别为8.2%(4/49)、6.1%(3/49),明显低于次级预防组发生率66.7%(18/27)、37.0%(10/27)(Z=-6.569,P=0.000;Z=-4.338,P=0.000)。在第三~六疗程中,2组中性粒细胞减少发生率无明显统计学差异(Z=-0.938,P=0.348;Z=-0.145,P=0.884;Z=-1.069,P=0.285;Z=-0.027,P=0.978)。化疗结束后初级预防组9例因中性粒细胞减少需补充rhG-CSF,发生率18.4%(9/49),次级预防组22例,发生率81.5%(22/27),2组比较差异有统计学意义(χ^(2)=28.711,P=0.000)。初级预防组2例因中性粒细胞减少需重复住院,发生率4.1%(2/49),次级预防组7例,发生率25.9%(7/27),2组比较差异有统计学意义(χ^(2)=6.002,P=0.014)。初级预防组1例因中性粒细胞减少导致化疗延迟,发生率2.0%(1/49),次级预防组5例,发生率18.5%(5/27),2组比较差异有统计学意义(χ^(2)=4.431,P=0.035)。结论卵巢癌初始肿瘤细胞减灭术后化疗过程中初级预防性应用PEG-rhG-CSF可显著降低第一、二疗程中性粒细胞减少发生率,从而降低中性粒细胞减少相关重复住院率,保证化疗周期如期顺利进行。展开更多
基金Supported by State Scientific Key Projects for New Drug Research and Development (2009ZX09102-250)High-tech Research Project for Medicine and Pharmacology of Jiangsu province (BG20070605)
文摘Objective To study the pharmacokinetics of a novel recombinant human granulocyte colonystimulating factor (rhG-CSFa) in rats and to determine the proteolytic rates of rhG-CSFa in the whole blood and serum of rats in vitro. Methods The pharmacokinetics of rhG-CSFa and conventional (wild type,WT) granulocyte colonystimulating factor (G-CSF) were investigated in Sprague-Dawley rats which received either intravenous or subcutaneous injection of rhG-CSFa or WT G-CSF at three different doses (20,50,or 100 μg/kg). The blood samples of rats were collected at multiple time points (from 0.08 to 12 h) and the concentrations of rhG-CSFa and WT G-CSF in serum were determined with a sandwich enzyme-linked immunosorbent assay (ELISA). For the study of proteolytic rates in vitro,the concentrations of rhG-CSFa or WT G-CSF were determined at 3-minute intervals after addition of the respective drug to rat’s whole blood or serum. Results Pharmacokinetic analysis of serum rhG-CSFa or WT G-CSF levels indicated that,at each dose tested,for either route of drug administration,the area under concentration-time curve values and the maximum serum concentration of rhG-CSFa were higher than those of WT G-CSF,and the serum half life of rhG-CSFa was longer than that of WT G-CSF. Subsequent in vitro whole blood and serum stability study showed that the rates of drug degradation in WT G-CSF were 1.8 folds and 1.5 folds higher than those in rhG-CSFa,respectively. Conclusion rhG-CSFa has better serum and whole blood stability in vitro and higher bioavailability in vivo as compared to WT G-CSF.
文摘目的探讨初级与次级预防性使用聚乙二醇化重组人粒细胞集落刺激因子(pegylated recombinant human granulocyte colony-stimulating factor,PEG-rhG-CSF)在卵巢癌初始肿瘤细胞减灭术后化疗的价值。方法2019年1月~2020年6月我院76例卵巢癌初始肿瘤细胞减灭术后行紫杉醇和卡铂联合化疗,根据初次预防性使用PEG-rhG-CSF分为初级预防组(n=49)和次级预防组(n=27),比较2组中性粒细胞减少发生率、需要补充重组人粒细胞集落刺激因子(recombinant human granulocyte colony-stimulating factor,rhG-CSF)率、中性粒细胞减少相关重复住院率、中性粒细胞减少相关化疗周期延迟发生率等。结果第一、二疗程中,初级预防组3、4度中性粒细胞减少发生率分别为8.2%(4/49)、6.1%(3/49),明显低于次级预防组发生率66.7%(18/27)、37.0%(10/27)(Z=-6.569,P=0.000;Z=-4.338,P=0.000)。在第三~六疗程中,2组中性粒细胞减少发生率无明显统计学差异(Z=-0.938,P=0.348;Z=-0.145,P=0.884;Z=-1.069,P=0.285;Z=-0.027,P=0.978)。化疗结束后初级预防组9例因中性粒细胞减少需补充rhG-CSF,发生率18.4%(9/49),次级预防组22例,发生率81.5%(22/27),2组比较差异有统计学意义(χ^(2)=28.711,P=0.000)。初级预防组2例因中性粒细胞减少需重复住院,发生率4.1%(2/49),次级预防组7例,发生率25.9%(7/27),2组比较差异有统计学意义(χ^(2)=6.002,P=0.014)。初级预防组1例因中性粒细胞减少导致化疗延迟,发生率2.0%(1/49),次级预防组5例,发生率18.5%(5/27),2组比较差异有统计学意义(χ^(2)=4.431,P=0.035)。结论卵巢癌初始肿瘤细胞减灭术后化疗过程中初级预防性应用PEG-rhG-CSF可显著降低第一、二疗程中性粒细胞减少发生率,从而降低中性粒细胞减少相关重复住院率,保证化疗周期如期顺利进行。
