One in five people carry a 'smart gene' variant linked to long lifespan, bigger forebrains and enhanced mental ability, researchers have found. 研究人员发现,每五个人中就有一个人携带聪明基因变体,携带这种基因的人更长寿,大脑的前额区域体积更大,心理能力也更强。
Objective To observe the effect of transplanted fetal brain tissue on the retrograde degeneration of cholinergic neurons of the basal forebrains induced by the bilateral frontal cortexes in the rats. 目的观察胎脑组织移植对额叶皮质损伤后大鼠基底前脑胆碱能神经元变性的影响。
Methods By using serum-free cell culture and single cell clone test, the neural stem cells were isolated and cultured from 7-week human embryonic forebrains and 13-week human embryonic cerebral cortex in different conditions and immunofluorescence tests were used to identify the cells. 方法在多种培养条件下,采用无血清培养和单细胞克隆技术,从7周和13周人胚脑中分离和培养神经干细胞,应用免疫荧光染色予以鉴定。