New Silver(I) Coordination Compound Loaded into Polymeric Nanoparticles as a Strategy to Improve In Vitro Anti-Helicobacter pylori Activity

Author(s):Show less -

Furquim de Camargo, Bruna Almeida ^[1] ; Soares Silva, Debora Eduarda ^[2] ; da Silva, Anderson Noronha ^[1] ; Campos, Debora Leite ^[1] ; Machado Ribeiro, Tamara Renata ^[1] ; Mieli, Maria Julia ^[3] ; Teixeira Zanatta, Melina Borges ^[4] ; da Silva, Patricia Bento ^[1] ; Pavan, Fernando Rogerio ^[1] ; Moreira, Cristiano Gallina ^[1] ; Resende, Flavia Aparecida ^[3] ; Menegario, Amauri Antonio ^[4] ; Chorilli, Marlus ^[1] ; de Godoy Netto, Adelino Vieira ^[2] ; Bauab, Tais Maria ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Sch Pharmaceut Sci, BR-14800903 Araraquara, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Inst Chem, BR-14800900 Araraquara, SP - Brazil

^[3] Univ Araraquara, Dept Biol Sci & Hlth, BR-14801340 Araraquara, SP - Brazil

^[4] Sao Paulo State Univ UNESP, Environm Studies Ctr, BR-13506900 Rio Claro, SP - Brazil

• Document type: Journal article
• Source: MOLECULAR PHARMACEUTICS; v. 17, n. 7, p. 2287-2298, JUL 6 2020.
• Web of Science Citations: 0

Abstract

Helicobacter pylori inhabits the gastric epithelium and can promote the development of gastric disorders, such as peptic ulcers, acute and chronic gastritis, mucosal lymphoid tissue (MALT), and gastric adenocarcinomas. To use nanotechnology as a tool to increase the antibacterial activity of silver I {[}Ag(I)] compounds, this study suggests a new strategy for H. pylori infections, which have hitherto been difficult to control. {[}Ag (PhTSC center dot HCl)(2)] (NO3)center dot H2O (compound 1) was synthesized, characterized, and loaded into polymeric nanoparticles (PN1). PN1 had been developed by nanoprecipitation with poly(epsilon-caprolactone) polymer and poloxamer 407 surfactant. System characterization assays showed that the PNs had adequate particle sizes and zeta-potentials. Transmission electron microscopy confirmed the formation of polymeric nanoparticles (PNs). Compound 1 had a minimum inhibitory concentration for H. pylori of 3.90 mu g/mL, which was potentiated to 0.781 mu g/mL after loading. The minimum bactericidal concentration of 7.81 mu g/mL was potentiated 5-fold to 1.56 mu g/mL in PN. Compound 1 loaded in PN1 displayed better activity for H. pylon biofilm formation and mature biofilm. PN1 reduced the toxicity of compound 1 to MRC-5 cells. Loading compound 1 into PN1 inhibited the mutagenicity of the free compound. In vivo, the system allowed survival of Galleria mellonella larvae at a concentration of 200 mu g/mL. This is the first demonstration of the antibacterial activity of a silver complex enclosed in polymeric nanoparticles against H. pylori. (AU)

• FAPESP's process: 16/17711-5 - INVESTIGATION OF THE ANTITUMOR POTENTIAL OF PALLADIUM(II) COMPOUNDS CONTAINING ORTHOMETALLATED OR N,S-DONOR LIGANDS
• Grantee: Adelino Vieira de Godoy Netto
• Support Opportunities: Regular Research Grants