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Epigallocatechin-gallate (EGCG) is a potent anti-cancer therapeutic which effectively controls the growth of cancerous cells through a variety of different pathways. However, its molecular structure is susceptible to modifications due to cellular enzymes affecting its stability, bioavailability and hence, overall efficiency. In this study, we have initially encapsulated EGCG in the matrix of solid lipid nanoparticles to provide a stable drug carrier. To confer additional specificity towards gastrin releasing peptide receptors (GRPR) overexpressed in breast cancer, EGCG loaded nanoparticles were conjugated with a GRPR-specific peptide. In-vitro cytotoxicity studies showed that the peptide-conjugated formulations possessed greater cytotoxicity to cancer cell lines compared to the non-conjugated formulations. Further, in-vivo studies performed on C57/BL6 mice showed greater survivability and reduction in tumour volume in mice treated with peptide-conjugated formulation as compared to the mice treated with non-conjugated formulation or with plain EGCG. These results warrant the potential of the system designed in this study as a novel and effective drug delivery system in breast cancer therapy.
This article was published in the following journal.
Name: Chemistry and physics of lipids
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Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.
Cell surface proteins that bind bombesin or closely related peptides with high affinity and trigger intracellular changes influencing the behavior of cells. Gastrin- releasing peptide (GRP); GRP 18-27 (neuromedin C), and neuromedin B are endogenous ligands of bombesin receptors in mammals.
A tetradecapeptide originally obtained from the skins of toads Bombina bombina and B. variegata. It is also an endogenous neurotransmitter in many animals including mammals. Bombesin affects vascular and other smooth muscle, gastric secretion, and renal circulation and function.
Synthesized magnetic particles under 100 nanometers possessing many biomedical applications including DRUG DELIVERY SYSTEMS and CONTRAST AGENTS. The particles are usually coated with a variety of polymeric compounds.
Diamond nanoparticles that exhibit unique biological, thermal, mechanical, and optoelectronic properties. They have important NANOMEDICINE applications including DRUG DELIVERY SYSTEMS; DIAGNOSTIC IMAGING; protein separation; and BIOSENSING TECHNIQUES.
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