LE PROBLÈME DE L'AMITOSE
1963; Elsevier BV; Linguagem: Inglês
10.1016/b978-1-4832-3074-0.50022-5
Autores Tópico(s)Genetic Syndromes and Imprinting
ResumoThis chapter discusses the existence of amitosis. The term amitosis is poorly chosen for it means only that the process is not mitotic. There is no satisfactory definition for amitosis that permits to distinguish this phenomenon unequivocally from simple nuclear strangulations and fragmentations. Nevertheless, it can be believed that amitosis does exist, at least as nuclear amitosis without subsequent cellular division. Amitosis has been followed in living cells cultivated in vitro. Moreover, there is indirect evidence for their occurrence in a certain number of tissues and organs. On the other hand, there is no doubt that a large number of the observations described as amitosis are not really such. A more critical appreciation of the nuclear forms susceptible of amitosis is indispensable in histological sections. There are great divergences of opinion concerning the duration of the course of amitosis. There are numerous working hypotheses regarding the conditions that bring about nuclear division by amitosis as well as to the functional significance and the destiny of cells involved.
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