| 摘要 |
The present invention provides a method, upon introducing an extracellular substance, such as sperm, a cell nucleus, a nucleic acid, and a protein, into a mammalian oocyte, for introducing the extracellular substance into a mammalian oocyte, which is safe for the mammalian oocyte, enables efficient introduction, and is technically easy. By treating the mammalian oocyte with a tubulin-polymerization inhibitor such as vinblastine, membrane fusion between the oocyte and the sperm is promoted, and the sperm and the oocyte are fused without making a hole in the oolemma and fertilization can be achieved. The method of the present invention can be applied not only to the case of introducing sperm into a mammalian oocyte, but also to the case of introducing an extracellular substance, such as a cell nucleus, a nucleic acid, and a protein, into a mammalian oocyte.
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