Preparation of Structurally Modified Plumbagin Silver Nanoparticle for its Prospective Binding to Trastuzumab
DOI:
https://doi.org/10.52783/jns.v14.2282Keywords:
Antibody conjugation, Plumbagin, TrastuzumabAbstract
Combination therapy plays a major part in reducing side effects in treatment of breast cancer. For treating HER2-positive breast cancer, HER2-targeted therapy is common. A natural compound, Plumbagin, gives activity against the HER2 receptor that can be employed in breast cancer therapy. A conjugation of plumbagin with Trastuzumab increases its targeting specificity to the HER2 receptor. However, the low stability of plumbagin necessitates an encapsulation in silver nanoparticles (AgNPs) to widen its stability and therapeutic efficacy. This study using Nano-precipitation technique, the silver nanoparticles were synthesized in varying concentrations of polyvinylpyrrolidone (PVP), silver nitrate, and sodium borohydride. The parameters of formulations are particle size, polydispersity index (PDI), and zeta potential, were optimized through statistical analysis by QBD design. Based on these parameters, a best formulation was selected. The successful loading of Plumbagin into the nanoparticles attained 85% entrapment efficiency. The release kinetics of the drug within 24 hours was approximately 89%. Nanoparticles were structurally modified with carbonyl groups to facilitate the conjugation with Trastuzumab, also this promotes attachment of the monoclonal antibody through its amine group. Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and Fourier-transform infrared (FTIR) spectroscopy tools recorded the confirmation of surface conjugation. This approach ensures a obligation strategy for the target delivery and also stability of plumbagin.
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