| Summary: | Aida López Ruiz, 1 Caterina Bartomeu Garcia, 2 Sandra Navarro Gallón, 2, 3 Thomas J Webster 2 1Department of Chemical Engineering, Universitat Rovira i Virgili, Tarragona, Spain; 2Department of Chemical Engineering, Northeastern University, Boston, MA, USA; 3Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Medellin, ColombiaCorrespondence: Aida López RuizDepartment of Chemical Engineering and Materials Science, New Jersey Institute of Technology, University Heights, 148 Chestnut Ave, Jersey City, NJ 07306, USATel +1 2018785235Email al568@njit.eduThomas J WebsterDepartment of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USATel +1617 373 6585Email th.webster@neu.eduBackground: Cancer is a disease with an enormous worldwide impact. One of the fatal complications in cancer patients are bacterial opportunistic infections. The use of chemotherapeutic drugs made cancer remission more frequent and prolonged patient survival, but, increased the risk of infections.Purpose: Address the current problem with growing pandemic cancer and considering high risks of complications with bacterial infections, the present study synthesized novel dendritic assembly of silver (Ag)-platinum (Pt) nanoparticles.Methods: Nanoparticles were characterized by TEM analysis, and the composition was confirmed by EDX. Bacterial studies were performed for Gram-positive Staphylococcus aureus, Gram-negative Pseudomonas aeruginosa and Gram-negative multi-drug resistant Escherichia coli. Cell experiments were performed with two different cancer cell lines, glioblastoma and melanoma to determine anticancer activity. Finally, cytotoxicity with fibroblast was tested.Results: The TEM analysis of silver-platinum (AgPt) nanoparticles showed dendrimer shape nanoparticles with a mean size of 42 ± 11nm. Elemental composition was analyzed by EDX, confirming the presence of both Ag and Pt metals. The synthesized nanoparticles significantly inhibited the growth of medically important pathogenic, Gram-positive Staphylococcus aureus, Gram-negative Pseudomonas aeruginosa and Gram-negative multi-drug resistant Escherichia coli. Bactericidal effect of AgPt nanoparticles had greater effectiveness than silver nanoparticles. MTS assay revealed a selective and dose-dependent anticancer activity of AgPt nanoparticles over cancer cell lines glioblastoma and melanoma in the 10– 250 μg/mL concentration range. Cytotoxicity experiments with fibroblast cells showed no side effects of nanoparticles against healthy cells at a range of concentrations from 10– 50 μg/mL.Conclusion: The newly synthesized AgPt nanoparticles have a promising future as a potent anticancer agent with antibacterial properties.Keywords: silver, platinum, nanoparticles, antimicrobial, anticancer, multi-drug resistant bacteria
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