Membrane Fusion Mediated Targeted Cytosolic Drug Delivery Through scFv Engineered Sendai Viral Envelopes

Title:Membrane Fusion Mediated Targeted Cytosolic Drug Delivery Through scFv Engineered Sendai Viral Envelopes

Volume: 15 Issue: 4

Author(s): M. Kumar, P. Mani, P. Pratheesh, S. Chandra, M. Jeyakkodi, P. Chattopadhyay, D.P. Sarkar and S. Sinha

Affiliation:

关键词: F-蛋白，F-病毒颗粒，胎盘碱性磷酸酶，单链抗体可变区基因片段，仙台病毒，靶向给药

摘要: Antibody targeted cytoplasmic delivery of drugs is difficult to achieve as antigen-antibody interaction results in the payload being directed to the endosomal compartment. However, Sendai viral envelopes can bring about cytoplasmic delivery due to F-protein mediated membrane fusion. In this study we have generated and fused a recombinant scFv directed to the onco-fetal antigen, the Placental isozyme of Alkaline Phosphatase (PAP) with the trans-membrane and part of the cytoplasmic domain of the Sendai F protein (F^TMC). Reconstituted virosomes, having both the fusion protein as well as the native F-protein were able to specifically bind and deliver drugs to PAP expressing cells. About 75% of the delivery was cytoplasmic in nature. Hence, this immuno-virosome, which is devoid of the comparatively more toxic HN protein, has the novel ability to combine specific antibody mediated targeting with cytoplasmic delivery. The scFv ensured specific binding to PAP expressing cells, without cross reacting with the other isozymes of alkaline phosphatase. The advantages of cytoplasmic delivery would include reduced degradation and lowered immunogenicity of the payload and carrier. The ubiquitous expression of PAP on a variety of cancers like seminoma, choriocarcinoma, cervical and breast cancers also suggests its potential usefulness in a number of malignancies.

Cite this article as:

M. Kumar, P. Mani, P. Pratheesh, S. Chandra, M. Jeyakkodi, P. Chattopadhyay, D.P. Sarkar and S. Sinha , Membrane Fusion Mediated Targeted Cytosolic Drug Delivery Through scFv Engineered Sendai Viral Envelopes, Current Molecular Medicine 2015; 15 (4) . https://dx.doi.org/10.2174/1566524015666150505155949