in vitro初代培养什么意思

In vitro意思为____,即以____为材料进行的实验；In vivo意思为____,即以____为材料进行的实验.

英语翻译
In vitro,NSCs grown in suspension form floating clusters termed
neurospheres.Because neurospheres are clonally derived from
neural stem cells,they provide a good experimental system for
studying neural cell differentiation,not only to obtain phenotypes
of potential therapeutic interest but also to define the basic mechanisms
that regulate the acquisition of a specific cell fate in the
nervous system.Sowe examined the role of integrin x024 on the generation
of neurons and gliacytes from NSCs by using neurospheres.
Increasing evidence indicates that integrin x024 induces cell differentiation
(Stagge et al.,2001).Additionally,the cytoplasmic
domain of the x024 subunit is directly involved in signaling events
that generate monocytic differentiation (Morena et al.,2002).