Photoactivated antibiotics to treat intracellular infection of bacteria

• Published in: Nanoscale advances Vol. 5; no. 7; pp. 191 - 1918
• Main Authors: Eller, Kristen A, Stamo, Dana F, McCollum, Colleen R, Campos, Jocelyn K, Levy, Max, Nagpal, Prashant, Chatterjee, Anushree
• Format: Journal Article
• Language: English
• Published: England RSC 28-03-2023
• Subjects: Chemistry
• ISSN: 2516-0230; 2516-0230
• DOI: 10.1039/d2na00378c

Antibiotic resistance combined with pathogen internalization leads to debilitating infections. Here we test novel superoxide producing, stimuli-activated quantum dots (QDs), to treat an intracellular infection of
Salmonella enterica
serovar Typhimurium in an osteoblast precursor cell line. These QDs are precisely tuned to reduce dissolved oxygen to superoxide and kill bacteria upon stimulation (
e.g.
, light). We show QDs provide tunable clearance at various multiplicities of infection and limited host cell toxicity by modulating their concentration and stimuli intensity, proving the efficacy of superoxide producing QDs for intracellular infection treatment and establishing a framework for further testing in different infection models.
Superoxide-producing CdTe-2.4 eV nanoparticles treat an intracellular infection of
Salmonella
in a 2D preosteoblast bone infection model.