Download MendeleyEfficient intracellular delivery of p53 protein by engineered protein crystals restores tumor suppressing function in vivo.
Yang, Z., Lee, M.M.M., Chan, M.K.(2021) Biomaterials 271: 120759-120759
- PubMed: 33798968
- DOI: https://doi.org/10.1016/j.biomaterials.2021.120759
- Primary Citation of Related Structures:
7EAR - PubMed Abstract:
Direct delivery of proteins into cells holds significant potential for basic research and drug development. However, the poor endosomal escape of conventional delivery strategies remains a challenge, thus limiting the clinical translation of many protein therapeutics. Herein, we report that engineered Cry3Aa protein (Pos3Aa) crystals formed naturally within Bacillus thuringiensis can serve as a vehicle for efficient cytosolic delivery of bioactive proteins. We showed that Pos3Aa-mediated delivery of tumor suppressor p53 protein, a promising therapeutic candidate found to be inactivated in nearly half of human cancers, resulted in the restoration of p53 function in p53-deficient cancer cells, and thereby sensitized them to 5-fluorouracil chemotherapy as demonstrated in in vitro and in vivo models. Our results validate that Pos3Aa crystals can be a robust and effective platform for the cytosolic delivery of effector proteins, and suggest that efficient uptake and endosomal escape could be critical for efficacious p53 protein-based cancer therapy.
Organizational Affiliation:
School of Life Sciences and Center of Novel Biomaterials, The Chinese University of Hong Kong, Shatin, Hong Kong, China.
