Scientists are reporting development of a new family of selective antimicrobial agents that do not rely on traditional antibiotics.
This is in an advance toward coping with bacteria that shrug off existing antibiotics and sterilization methods.
Their report on these synthetic colloid particles, which can be custom-designed to recognize the shape of specific kinds of bacteria and inactivate them, appears in the Journal of the American Chemical Society.
Paunov's team describes development and successful tests of synthetic colloid particles, called "colloid antibodies." Colloids are materials in which tiny particles of one material are dispersed in another material. Milk is a colloid in which globules of fat are spread throughout water and other materials. The colloid antibody particles are shells packed with a killing agent. They are designed to recognize and bind to specific bacteria.
Laboratory experiments showed that the colloid antibodies attached to and inactivated only their intended targets without harming other cells. "We anticipate that similar shape selective colloid antibodies can potentially become a powerful weapon in the fight against antibiotic-resistant bacteria," say the researchers. "They can also find applications as non-toxic antibacterial agents, preventing growth of harmful bacteria in various formulations."