RESUMO
Cancer is one of the most important issues in modern medicine and the most common cause of death after cardiovascular diseases in many countries. Brain cancer is one of the most common causes of cancer death among men and women, ranking third. Chemotherapeutic drugs that aim to prevent uncontrolled proliferation of cells in tissues of the body and induce apoptosis of tumor cells are prominent candidates for development. Since cisplatin has an apoptosisinducing role, it is widely used as an anticancer agent. In this research, toxicity of cisplatin was studied with the C6 rat glioma cell lined using the MTT method. In addition, nanoparticles underwent SEM microscopic imaging. Particle average size, size distribution, polydispersity index (PDI) and zeta potential of poly butyl cyanoacrylate nanoparticles were found to be 222 nm, 0.470 ± 0.04 and 5.1 ± 0.2 mV, respectively. The results showed that nanoconjugates of cisplatin have more cytotoxic effects on C6 cells than the free drug (P<0.05), pointing to an enhanced potential of the synthesized nano-particles as a new nanocarrier for chemotherapy.
RESUMO
The initial response to treatment and subsequent development of resistance to carboplatin are very important challenges. Use of nano drug delivery is a new method to replace standard chemotherapy. In this research, both non-PEGylated and PEGylated nanoparticles (NPs) were prepared by mini-emulsion polymerization of poly (butyl cyanoacrylate) (PBCA) NPs. Characteristics such as size, polydispersity index (PDI), zeta potential, drug release, and stability were examined. In addition, infrared spectroscopy was used for description of the produced NPs. Then, cytotoxicity effects of both formulations were studied on the A2780CIS ovarian cancer cell line with incubation for 24, 48, and 72h. Examination of characteristics of loaded carboplatin on the PBCA NPs under suitable laboratory conditions showed a positive effect of PEG on their properties. Cytotoxicity studies demonstrated greater toxicity with both formulations of nano-drugs than the free drug. The results indicated that PBCA NPs can be considered as suitable candidates for nano-drugs in chemotherapy.
RESUMO
BACKGROUND: Breast cancer is one of the most frequent cancer types within female populations. Silibinin is a chemotherapeutic agent active against cancer. Niosomes are biodegradable, biocompatible, safe and effective carriers for drug delivery. OBJECTIVE: To prepare nanoniosomal silibinin and evaluate its cytotoxicity in the T-47D breast cancer cell line. MATERIALS AND METHODS: Niosomes were prepared by reverse phase evaporation of a mixture of span 20, silibinin, PEG-2000 and cholesterol in chloroform and methanol solvent (1:2 v/v). The solvent phase was evaporated using a rotary evaporator and the remaining gel phase was hydrated in phosphate buffer saline. Mean size, size distribution and zeta potential of niosomes were measured with a Zetasizer instrument and then nanoparticles underwent scanning electron microscopy. The drug releasing pattern was evaluated by dialysis and the cytotoxicity of nanoniosomes in T-47D cells was assessed by MTT assay. RESULTS: Particle size, size variation and zeta potential of the niosomal nanoparticles were measured as 178.4 ± 5.4 nm, 0.38 ± 0.09 and -15.3 ± 1.3 mV, respectively. The amount of encapsulated drug and the level of drug loading were determined 98.6 ± 2.7% and 22.3 ±1.8%, respectively; released drug was estimated about 18.6±2.5% after 37 hours. The cytotoxic effects of nanoniosome were significantly increased when compared with the free drug. CONCLUSIONS: This study findings suggest that silibinin nanoniosomes could serve as a new drug formulation for breast cancer therapy.
