Abstract:
:The controversy surrounding the use of diphtheria toxin (DT) as a therapeutic agent against tumor cells arises mainly from its unexpected harmfulness to healthy tissues. We encoded the cytotoxic fragment A of DT (DTA) as an objective gene in the Light-On gene-expression system to construct plasmids pGAVPO (pG) and pU5-DTA (pDTA). Meanwhile, a cRGD-modified ternary complex comprising plasmids, chitosan, and liposome (pG&pDTA@cRGD-CL) was prepared as a nanocarrier to ensure transfection efficiency. Benefiting from spatiotemporal control of this light-switchable transgene system and the superior tumor targeting of the carrier, toxins were designed to be expressed selectively in illuminated lesions. In vitro studies suggested that pG&pDTA@cRGD-CL exerted arrest of the S phase in B16F10 cells upon blue light irradiation and, ultimately, induced the apoptosis and necrosis of tumor cells. Such DTA-based treatment exerted enhanced antitumor activity in mice bearing B16F10 xenografts and displayed prolonged survival time with minimal side effects. Hence, we described novel DTA-based therapy combined with nanotechnology and the Light-On gene-expression system: such treatment could be a promising strategy against melanoma.
journal_name
Mol Pharmjournal_title
Molecular pharmaceuticsauthors
Xu J,He M,Hou X,Wang Y,Shou C,Cai X,Yuan Z,Yin Y,Lan M,Lou K,Zhao Y,Yang Y,Chen X,Gao Fdoi
10.1021/acs.molpharmaceut.9b01038subject
Has Abstractpub_date
2020-01-06 00:00:00pages
301-315issue
1eissn
1543-8384issn
1543-8392journal_volume
17pub_type
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