Delivery of CRISPR/Cas9 by Novel Strategies for Gene Therapy

Precise editing of the genome of a living body is a goal pursued by scientists in many fields. In recent years, CRISPR (clustered regularly interspaced short palindromic repeat)/Cas (CRISPR-associated) genome-editing systems have become a revolutionary toolbox for gene editing across various species. However, the low transfection efficiency of the CRISPR/Cas9 system to mammalian cells in vitro and in vivo is a big obstacle hindering wide and deep application. In this review, recently developed delivery strategies for various CRISPR/Cas9 formulations and their applications in treating gene-related diseases are briefly summarized. This review should inspire others to explore more efficient strategies for CRISPR system delivery and gene therapy.