PEGylated Lecithin-Chitosan-Folic Acid Nanoparticles as Nanocarriers of Allicin for In Vitro Controlled Release and Anticancer Effects.

In this study, chitosan-lecithin nanoparticles modified with polyethylene glycol (PEG) and folic acid (FA) were used to deliver allicin (AC) to colon cancer cells. AC-loaded polyethylene glycol (PEG) and folic acid (FA)-modified chitosan-lecithin nanoparticles (AC-PLCF-NPs) were fabricated via self-assembling procedure. HPLC for AC encapsulation and FA binding, MTT for viability assay, ABTS and DPPH for antioxidant capacity, disc diffusion, MIC and MBC for antibacterial assay, qPCR and AO/PI staining for apoptotic, and CAM assay for angiogenesis effects of AC-PLCF-NPs were used. AC-PLCF-NPs (113.55 nm) were synthesized as single dispersed (PDI: 0.28) and stable (ZP: + 33.18 mV) with 81% AC encapsulation and 48% FA binding. The antioxidant power of AC-PLCF-NPs was confirmed by inhibiting free radicals ABTS (74.25 µg/mL) and DPPH (366.214 µg/mL) and its antibacterial capacity with very high inhibitory effects against gram-negative bacterial strains. MTT results showed higher toxicity of AC-PLCF-NPs (68.06 µg/mL) compared to AC (171.45 µg/mL). Increased expression of caspase 3 and 9 genes showed activation of the intrinsic apoptosis pathway in treated cells, and on the other hand, reduction of vascular and embryonic growth factors in CAM model confirmed the anti-angiogenesis effects of AC-PLCF-NPs. AC-PLCF-NPs can be suggested as a promising therapeutic agent for studies in the field of colon cancer treatment.