目的探究巨噬细胞表面特异分子跨膜4域亚家族A成员6D(membrane-spanning 4-domains subfamily A member 6D,Ms4a6d)基因敲除对雌性小鼠生育力的影响。方法构建Ms4a6d基因敲除小鼠,以各周龄纯合Ms4a6d基因敲除(Ms4a6d^(-/-))小鼠为实验组...目的探究巨噬细胞表面特异分子跨膜4域亚家族A成员6D(membrane-spanning 4-domains subfamily A member 6D,Ms4a6d)基因敲除对雌性小鼠生育力的影响。方法构建Ms4a6d基因敲除小鼠,以各周龄纯合Ms4a6d基因敲除(Ms4a6d^(-/-))小鼠为实验组;采用qPCR、琼脂糖凝胶法鉴定小鼠基因型;运用HE染色、免疫荧光、ELISA等方法检测血清抗缪勒管激素(anti-müllerian hormone,AMH)和雌性Ms4a6d^(-/-)小鼠卵巢中巨噬细胞数量及各级卵泡构成变化;通过生育力实验比较成年Ms4a6d^(-/-)雌鼠妊娠率及平均产仔数变化。结果与同周龄野生型(Ms4a6d+/+)雌鼠比较,2周龄和4周龄的Ms4a6d^(-/-)雌鼠卵巢组织中巨噬细胞显著减少(P<0.01);8周龄时2组卵巢巨噬细胞差异无统计学意义;8周龄Ms4a6d^(-/-)雌鼠卵巢系数显著降低(P<0.01);8周龄时卵巢组织中原始卵泡、初级卵泡、次级卵泡和窦卵泡数量显著减少(P<0.05),各年龄段Ms4a6d^(-/-)雌鼠血清中AMH显著降低(P<0.05)。成年Ms4a6d^(-/-)雌鼠的平均妊娠率为56%,每胎产仔数为(4.1±1.1)只,均显著低于同龄野生型雌鼠的妊娠率(89%)和每胎产仔数[(6.3±1.2)只]。结论Ms4a6d基因敲除导致青春期前雌鼠卵巢组织中巨噬细胞数量减少,抑制其生长卵泡发育,最终表现为成年雌鼠卵巢储备减少,生育力降低。展开更多
Regulation of stormwater runoff is increasing throughout the United States.The Environmental Protection Agency(EPA)and state agencies are beginning to move toward effluent and/or load limits for pollutants in stormwat...Regulation of stormwater runoff is increasing throughout the United States.The Environmental Protection Agency(EPA)and state agencies are beginning to move toward effluent and/or load limits for pollutants in stormwater.Compliance costs for treating urban stormwater runoff,especially in highly-developed areas where retrofits are required,will only continue to increase.展开更多
文摘目的探究巨噬细胞表面特异分子跨膜4域亚家族A成员6D(membrane-spanning 4-domains subfamily A member 6D,Ms4a6d)基因敲除对雌性小鼠生育力的影响。方法构建Ms4a6d基因敲除小鼠,以各周龄纯合Ms4a6d基因敲除(Ms4a6d^(-/-))小鼠为实验组;采用qPCR、琼脂糖凝胶法鉴定小鼠基因型;运用HE染色、免疫荧光、ELISA等方法检测血清抗缪勒管激素(anti-müllerian hormone,AMH)和雌性Ms4a6d^(-/-)小鼠卵巢中巨噬细胞数量及各级卵泡构成变化;通过生育力实验比较成年Ms4a6d^(-/-)雌鼠妊娠率及平均产仔数变化。结果与同周龄野生型(Ms4a6d+/+)雌鼠比较,2周龄和4周龄的Ms4a6d^(-/-)雌鼠卵巢组织中巨噬细胞显著减少(P<0.01);8周龄时2组卵巢巨噬细胞差异无统计学意义;8周龄Ms4a6d^(-/-)雌鼠卵巢系数显著降低(P<0.01);8周龄时卵巢组织中原始卵泡、初级卵泡、次级卵泡和窦卵泡数量显著减少(P<0.05),各年龄段Ms4a6d^(-/-)雌鼠血清中AMH显著降低(P<0.05)。成年Ms4a6d^(-/-)雌鼠的平均妊娠率为56%,每胎产仔数为(4.1±1.1)只,均显著低于同龄野生型雌鼠的妊娠率(89%)和每胎产仔数[(6.3±1.2)只]。结论Ms4a6d基因敲除导致青春期前雌鼠卵巢组织中巨噬细胞数量减少,抑制其生长卵泡发育,最终表现为成年雌鼠卵巢储备减少,生育力降低。
文摘Regulation of stormwater runoff is increasing throughout the United States.The Environmental Protection Agency(EPA)and state agencies are beginning to move toward effluent and/or load limits for pollutants in stormwater.Compliance costs for treating urban stormwater runoff,especially in highly-developed areas where retrofits are required,will only continue to increase.