SD大鼠胚胎-胎仔发育毒性试验背景数据的建立OA北大核心CSTPCD
Background data of SD rats in embryo-fetal development toxicity study
目的 总结国家药物安全评价监测中心2013-2022年SD大鼠胚胎-胎仔发育毒性试验各指标的正常值范围,建立SD大鼠胚胎-胎仔发育毒性试验各指标的背景数据库,为药物胚胎-胎仔发育毒性评价提供参考.方法 对本中心2013-2022年11项SD大鼠胚胎-胎仔发育毒性试验中对照组共计205只孕鼠和3037只胎鼠各项胚胎发育和胎仔生长发育指标进行统计分析,计算其平均数、标准差、变异系数和95%置信区间.指标包括孕鼠妊娠期体重和体重增长幅度、孕鼠摄食量、妊娠结局(妊娠率、平均黄体数、平均着床数、平均活胎数、活胎率、吸收胎率、死胎率)、胎仔生长发育情况(胎仔重、胎盘重、性别比)、胎仔外观异常率、内脏异常率和骨骼异常率.结果 孕鼠妊娠期体重呈增长趋势,妊娠后期体重增长幅度明显增大.孕鼠摄食量随着妊娠时间的增加呈增长趋势.妊娠第20天进行剖腹产,妊娠率为93.2%,平均黄体数、着床数和活胎数分别为18.0±3.2,15.9±2.8和14.8±3.0,活胎率为93.4%,死胎率为6.6%;胎仔雄/雌性别比为0.94,平均体重为(3.6±0.3)g,胎盘平均重量为(0.6±0.3)g.胎仔外观异常发生率约为0.2%,内脏异常率约为0.8%.骨骼异常率约为1.2%,未骨化和骨化不全的发生率较高,主要发生于胸骨和舌骨等,胎仔的掌骨骨化数、跖骨骨化数和骶尾椎骨化数分别为7.0±0.7,8.0±0.1和7.4±0.5,第Ⅰ～Ⅳ胸骨骨化率较高,平均为98.6%～99.9%,第Ⅴ胸骨骨化率为(68.0±28.4)%,第Ⅵ胸骨骨化率为(82.8±23.9)%.结论 初步建立了本GLP实验室SD大鼠胚胎-胎仔发育毒性试验中各指标背景数据库,为生殖毒性研究提供参考.
OBJECTIVE To set up normal ranges for indexes in embryo-fetal development toxicity studies in Sprague-Dawley(SD)rats and to establish a background database to provide reference for the embryo-fetal development toxicity evaluation of drugs.METHODS The data on embryonic develop-ment and fetal growth from embryo-fetal development toxicity studies(11 items)conducted by our center between 2013 and 2022 was statistically analyzed,involving 205 pregnant rats and 3037 fetuses in total,with the mean and standard deviation,coefficient of variation and 95%confidence interval calculated.The indexes included body mass,body mass gain and food consumption during pregnancy,pregnancy outcomes(pregnancy rate,average corpora lutea,average Implant sites,average live conceptuses,live conceptuse rate,resorption rate and dead conceptuse rate),fetal growth and development(fetal mass,placental mass and sex ratio),appearance abnormality rate,visceral abnormality rate,and skeletal abnormality rate.RESULTS The mass of pregnant rats trended up during gestation,with significant increases in the late period.Food consumption increased along with gestation.Caesarean section was conducted on gestation day 20,and the pregnancy rate was 93.2%.The average corpora lutea,Implant sites and live conceptuses were 18.0±3.2,15.9±2.8 and 14.8±3.0,respectively.The live conceptuse rate was 93.4%while the total dead embryo rate was 6.6%.The average mass of fetuses and placenta were respectively 3.6±0.3 and(0.6±0.3)g,and the fetal sex ratio(male/female)was 0.94.The incidence of fetal appearance abnormalities was about 0.2%,and that of soft tissue abnormalities was approximately 0.8%.The rate of skeletal abnormalities was about 1.2%,with higher incidence of non-ossification and incomplete ossification mostly identified on sternum and hyoid bone.The numbers of ossifications of metacarpal bones,metatarsal bones and sacrococcygeal vertebrae were 7.0±0.7,8.0±0.1 and 7.4±0.5,respectively.The rate of ossification of sternumⅠtoⅣwas higher,with an average of about 98.6%-99.9%.The ossification rates of sternum Ⅴ and Ⅵ were(68.0±28.4)%and(82.8±23.9)%.CONCLUSION The background database of indexes in the embryo-fetal development toxicity study on SD rats is established for our GLP laboratory,which provides reference for reproductive toxicity studies.
赵曼曼;梁子禾;刘晓萌;杨莹;王超;赵婷婷;耿兴超;周晓冰;王三龙
中国食品药品检定研究院,国家药物安全评价监测中心,药物非临床安全评价研究北京市重点实验室,北京 100176中国食品药品检定研究院,国家药物安全评价监测中心,药物非临床安全评价研究北京市重点实验室,北京 100176||中国药科大学多靶标天然药物全国重点实验室,江苏 南京 210009
药学
胚胎胎仔发育毒性SD大鼠背景数据
embryofetaldevelopmental toxicitySD ratsbackground data
《中国药理学与毒理学杂志》 2024 (007)
526-532 / 7
中国食品药品检定研究院中青年发展研究基金(2020C1) Youth Development Research Foundation of NIFDC(2020C1)
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