Effect of Silver-Doped Phosphate-Based Glasses on Bacterial Biofilm Growth

Abstract

Silver-containing phosphate-based glasses were found to reduce the growth of Pseudomonas aeruginosa and Staphylococcus aureus biofilms, which are leading causes of nosocomial infections. The rates of glass degradation (1.27 to 1.41 g ⅐ mm ؊2 ⅐ h ؊1 ) and the corresponding silver release were found to account for the variation in biofilm growth inhibitory effect.

In vitro Study of the Antibacterial Activity of Bioactive Glass‐ceramic Scaffolds

“…[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] This antibacterial activity was very dependent on glass composition, glass concentration, particle size, and on the microorganisms tested. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] This large body of positive results has led to the development of a series of foam-like scaffolds for bone tissue engineering based on BGs and glass-ceramics. [22][23][24] One group of highly porous scaffolds recently produced is based on the original 45S5 Bioglass 1 composition (45 SiO 2 , 24.5 CaO, 24.5 Na 2 O, and 6 P 2 O 5 in wt%).…”

The effect of ionic and metallic silver on the crystalline phases developed in CaO–Al2O3–TiO2–P2O5 glasses

“…Although silver has been used in phosphate-based glasses to induce antibacterial effects [16][17][18][19][20] and ionic conductivity [21][22][23][24][25][26], its influence on the crystallization of the reported systems has not yet been investigated. Therefore, two series of glasses belonging to the CaO-Al 2 O 3 -TiO 2 -P 2 O 5 system with different silver content were fabricated.…”

Antibacterial effect of gallium and silver on Pseudomonas aeruginosa treated with gallium–silver–phosphate-based glasses

“…Biofilms show a decreased susceptibility to antibiotics, disinfectants and clearance by host defences [1]. Therefore alternative anti-biofilm strategies such as controlled metal ion releasing phosphate-based glasses (PBGs) have attracted considerable interest recently [2][3][4][5][6]. PBGs have unique dissolution properties in aqueous-based fluids compared with silicate-based glasses such as Bioglass [2].…”

“…Among these, bacterial adhesion on biomaterial surfaces is a key step in biofilm infections, and it is initiated by the interaction of cells with a surface, a process governed by long-range forces, primarily van der Waals and electrostatic interactions [7]. Silver has already been incorporated into PBGs and found to possess anti-adhesive and antibacterial activity against P. aeruginosa [4]. Recently galliumdoped PBGs emerged as a potential therapeutic agent that was found to inhibit P. aeruginosa growth and biofilm formation in vitro [5] by interfering with bacterial Fe metabolism [8].…”