Abstract
Purpose: Study on gold based therapeutic agents for cancer cells deracination has become under scrutiny in recent years owing to effective treatments are not available for rapidly progressive cancers. The aim of present study was to examine efficiency of radioactive 198Au/PAMAMG4 and non-radioactive 197Au/PAMAMG4 nancomposites against 4T1 and MCF7 breast cancer cell lines.Methods: The PAMAMG4 dendrimer was treated with the gold anions and then, the mixture was chemically reduced by NaBH4. Prepared 197Au/PAMAMG4 was bombarded by thermal neutrons in the Tehran Research Reactor to 198Au/PAMAMG4 be produced. Prepared nanocomposites were characterized by means of FT-IR, 1H NMR, Zeta-potential measurements, TEM and EDX analyses. The radionuclidic purity of the 198Au/PAMAMG4 solution was determined using purity germanium (HPGe) spectroscopy and its stability in the presence of human serum was studied. In vitro studies were carried out to compare toxicity of PAMAMG4, 197Au/PAMAMG4 and 198Au/PAMAMG4 towards 4T1 and MCF7 cancerous cells and C2C12 normal cell lines.Results: Characterization results exhibited that invitro agents, 197Au/PAMAMG4 and 198Au/PAMAMG4, were synthesized successfully. Cells viability after 24 h, 48 h, and 72 h incubation, using MTT assay showed that the toxicity of 198Au/PAMAMG4 is significantly superior in comparison with 197Au/PAMAMG4 and PAMAMG4. Furthermore, the toxicity of 198Au/PAMAMG4 was higher on cancerous cells especially in higher level of concentrations after 72 hours (P<0.05).Conclusion: In the current study, the preparation of 197Au/PAMAMG4 and 198Au/PAMAMG4 is described and the cytotoxic properties of them against the MCF7, 4T1 cancerous cells and C2C12 normal cells were evaluated using MTT assay.
Highlights
IntroductionGold nanoparticles (NPs) have recently received great technological and scientific interest due to their extensive applications in biology, catalysis, and nanotechnology.[1]Some polymer-based methods in order to preparation of AuNPs are reported up to now.[2,3,4,5,6] the dendrimer templating procedure for producing gold NPs is known as a powerful method to form organicinorganic nanocomposites hybrid materials for medical and biological applications.[7,8] The dendrimers could stabilize the colloidal Au particles in aqueous solution at concentrations where unmodified colloids agglomerate.the size of the colloids is a function of dendrimer generation.[8]
Synthesis and characterization of 197Au/PAMAMG4 and 198Au/PAMAMG4 nanohybrids 197Au/PAMAMG4 was prepared by two consecutive stages: First, the complex between dendrimer and the gold anions was formed, the complexed ions were chemically reduced by a reducing agent (NaBH4).[26,27,28]
Comparison of FTIR curve of non-active 197Au/PAMAMG4 compound with radioactive 198Au/PAMAMG4 exhibited that the N-H band present at 1640cm-1 is stronger at non-active complex
Summary
Gold nanoparticles (NPs) have recently received great technological and scientific interest due to their extensive applications in biology, catalysis, and nanotechnology.[1]Some polymer-based methods in order to preparation of AuNPs are reported up to now.[2,3,4,5,6] the dendrimer templating procedure for producing gold NPs is known as a powerful method to form organicinorganic nanocomposites hybrid materials for medical and biological applications.[7,8] The dendrimers could stabilize the colloidal Au particles in aqueous solution at concentrations where unmodified colloids agglomerate.the size of the colloids is a function of dendrimer generation.[8]. As a new class of highly branched, monodispersed, and synthetic macromolecules, poly amidoamine (PAMAM)
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