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Updated: Feb 13, 2026

Modeling Chemotherapy Resistant Leukemia In Vitro
Published on: February 9, 2016
Adenovirus E1A protein sensitizes chemotherapy-resistant tumors to cisplatin
Muhammad Shahid Mehmood1, Muhammad Ismail1, Naseeb Danaf2
1Institute of Microbiology, Faculty of Veterinary Science, University of Agriculture Faisalabad, Faisalabad, Pakistan.
Abstract:
Cisplatin resistance remains a critical obstacle in surgical oncology, with treatment failure exceeding 60% in recurrent solid tumors. The adenovirus type 5 early region 1A (E1A) protein demonstrates remarkable chemosensitization through p53-dependent and p53-independent pathways, achieving a 10-fold enhancement in cisplatin sensitivity in resistant cell lines. Clinical trials combining E1A-expressing oncolytic adenoviruses with cisplatin show response rates of 63% compared to 30-40% for chemotherapy alone. E1A restores apoptotic responses through p19ARF/p53 signaling, nuclear factor-kappaB inhibition, and CtBP corepressor interactions. Integration with surgical cytoreduction offers promise for neoadjuvant tumor downstaging and adjuvant micrometastatic elimination. Despite immunogenicity challenges, E1A-based viral therapeutics represent a mechanistically validated approach warranting inclusion in multimodal treatment strategies for chemotherapy-resistant cancers.
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