The first study of cell division in embryos was found to "change textbooks"

long believed that during the first cell division of a mammalian embryo, only one spindle was responsible for distributing the embryo's chromosomes to two cells. But European researchers used the latest experiments in mice to see that there were actually two spindles in the process, responsible for chromosomes from fathers and mothers.
the latest findings mean that the genetic information of parents is preserved separately during the first cell division of an embryo, researchers at the European Molecular Biology Laboratory said in a new issue of the American journal
. The researchers stress that this is a "textbook-changing" study that could explain why the first few cell divisions in early mammals are prone to errors and may even change the definition of when life begins in some countries.Jan Allenberg of the European Molecular Biology Laboratory, who is
's research director, said in a statement: 'We know that simple creatures such as insects have double spindles, but it is "amazing" not to expect mammals like mice to do the same.
spindle body is a special cell device shaped like a spindle. In the process of silky division of animal cells, chromosomes are arranged in the center of the spindle through silk dots. In the latest experiment, researchers used light-lensing technology developed by Allenberg et al. to observe the early development of an embryo in real time before observing for the first time the presence of two spindles during the embryo's first cell division.
researchers say mammalian embryos often make mistakes during the first cell division process, producing abnormal cells with multiple nucleuts that cause embryo development to stop. The discovery of the double spindle provides a new explanation for this problem and is expected to be used to find new molecular targets. If the final findings are applicable to humans, it could provide new ideas for treating infertility.
researchers believe the findings could change the definition of when life begins in some countries. In some countries, the law states that life begins with the fusion of the nucleocles of sperm and eggs after fertilization. But if the discovery of double spindles applies to humans, life may start slightly back, at least after the first cell division. (Source: Xinhua News Agency Zhou Zhou)