The present invention relates to a method for inducing the transdifferentiation of B lymphoid cells into T lymphoid cells using transcription factor Hoxb5, and related products and applications thereof. The method of the present invention specifically comprises: introducing Hoxb5, a nucleic acid molecule encoding Hoxb5 or a construct comprising the nucleic acid molecule into the B lymphoid cells to obtain the B lymphoid cells with overexpressed Hoxb5; then implanting the obtained B lymphoid cells into the body of a subject to obtain regenerated T cell progenitor cells by way of transdifferentiation, and then the T cell progenitor cells differentiate into mature T cells with functions. The regenerated T cells obtained using the method of the present invention are not only functionally normal, but also show no risk of tumorigenesis or extremely low risk of tumorigenesis.

The present invention relates to a method for inducing the transdifferentiation of B lymphoid cells into T lymphoid cells using transcription factor Hoxb5, and related products and applications thereof. The method of the present invention specifically comprises: introducing Hoxb5, a nucleic acid molecule encoding Hoxb5 or a construct comprising the nucleic acid molecule into the B lymphoid cells to obtain the B lymphoid cells with overexpressed Hoxb5; then implanting the obtained B lymphoid cells into the body of a subject to obtain regenerated T cell progenitor cells by way of transdifferentiation, and then the T cell progenitor cells differentiate into mature T cells with functions. The regenerated T cells obtained using the method of the present invention are not only functionally normal, but also show no risk of tumorigenesis or extremely low risk of tumorigenesis.