Evaluation of AAV-mediated delivery of shRNA to target basal-like breast cancer genetic vulnerabilities

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Pinto, C (Author) FCUP; Silva, G (Author) Other; Ribeiro, AS (Author) Other; Oliveira, M (Author) Other; Garrido, M (Author) Other; Bandeira, VS (Author) Other; Nascimento, A (Author) Other; Coroadinha, AS (Author) Other; Peixoto, C (Author) Other; Barbas, A (Author) Other; Paredes, J (Author) Other; Brito, C (Author) Other; Alves, PM (Author) Other

Journal

Title: Journal of Biotechnology

Vol. 300

Pages: 70-77

ISSN: 0168-1656

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 15 Citations

Other information

Authenticus ID: P-00Q-NPE

DOI: 10.1016/j.jbiotec.2019.05.016

Abstract (EN): Adeno-associated viral vectors (AAV) for gene therapy applications are gaining momentum, with more therapies moving into later stages of clinical development and towards market approval, namely for cancer therapy. The development of cytotoxic vectors is often hampered by side effects arising when non-target cells are infected, and their production can be hindered by toxic effects of the transgene on the producing cell lines. In this study, we evaluated the potential of rAAV-mediated delivery of short hairpin RNAs (shRNA) to target basal-like breast cancer genetic vulnerabilities. Our results show that by optimizing the stoichiometry of the plasmids upon transfection and time of harvest, it is possible to increase the viral titers and quality. All rAAV-shRNA vectors obtained efficiently transduced the BLBC cell lines MDA-MB-468 and HCC1954. In MDA-MB-468, transduction with rAAV-shRNA vector targeting PSMA2 was associated with significant decrease in cell viability and apoptosis induction. Importantly, rAAV2-PSMA2 also slowed tumor growth in a BLBC mouse xenograft model, thus potentially representing a therapeutic strategy against this type of cancer.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8