Human artificial chromosome ( hac ) will solve some critical problems of gene therapy if it was used as the vector for gene therapy .

人类人工染色体（hac）作为基因治疗载体将解决基因治疗存在的一些关键问题。

Results the fusion were achived 4 cases at 6 weeks and 5 cases at 10 weeks in the acb group , none fusion was found in nano hac group .

结果acb组6周4例，10周5例融合；nano-hac组无1例融合；