Maximising efficacy in HER2-positive breast cancer: immunoliposomal co-delivery of miR155 inhibitor and paclitaxel for targeted therapy†

Breast cancer, particularly the HER2 positive subtype, presents a formidable challenge in clinical oncology, necessitating innovative therapeutic strategies. Here, we present a novel immunoliposome-based formulation designed for targeted delivery of paclitaxel and miRNA inhibitors to HER2-positive breast cancer cells. Through a rigorous preclinical evaluation encompassing in vitro cellular studies and an in vivo tumor xenograft model, we demonstrate the formulation’s remarkable efficacy in inhibiting cell proliferation, inducing apoptosis, and suppressing tumor growth. Histopathological assessments reveal a favourable safety profile with minimal adverse effects on normal tissues. Furthermore, the study unveils the synergistic interaction between paclitaxel and miRNA inhibitor within the formulation, offering a potential avenue for combination therapy. The novelty of the study lies in the development of a precise and targeted therapeutic approach tailored to HER2-positive breast cancer, addressing critical gaps in current treatment modalities. Our findings underscore this innovative formulation’s clinical relevance and translational potential, paving the way for personalised and effective therapies in HER2-positive breast cancer management.