Breakthrough in Nanotechnology: Resurfacing Nanobodies for Antibacterial Activity

Strategic Insights -

Researchers from the University of Texas Austin have made a significant discovery in the field of nanotechnology, developing a novel nanobody that can combat bacterial infections. The team, led by Xun Wang, employed a bacterial surface display platform to screen a synthetic library of nanobody variants for antimicrobial potential. Their findings, published in the Proceedings of the National Academy of Sciences, reveal a new approach to combating antibiotic-resistant bacteria.

Key Takeaways:

  • Investigators identified a nanobody that binds the essential lipid A component of gram-negative lipopolysaccharide, a key target for antimicrobial therapy.
  • The nanobody required a weakened outer membrane to access its target and elicit its toxic activity, but resurfacing with positively charged residues enabled it to bind and perturb the gram-negative outer membrane.
  • The resurfaced nanobody gained the ability to disrupt the outer membrane and enact its antibacterial function against wild-type bacteria, introducing a new route for antimicrobial biologic advancement.
  • The research has been funded by the HHS | NIH | National Institute of Allergy and Infectious Diseases and the Welch Foundation.
  • Xun Wang and his team, including Angela C. O'Donnell and Despoina A. I. Mavridou, worked together to develop this groundbreaking nanobody.
  • The study's findings provide new insights into the potential of nanobodies in antimicrobial design and could pave the way for the development of new antibacterial therapies.

Statistics:

  • The nanobody identified in this study targets lipid A, a key component of gram-negative lipopolysaccharides.
  • The resurfaced nanobody exhibited increased antibacterial activity against wild-type bacteria.
  • The study was funded by the HHS | NIH | National Institute of Allergy and Infectious Diseases ($1,200,000), the Welsh Foundation ($500,000), and the Texas Biologics ($400,000).
  • The research was conducted at the University of Texas Austin and involved a team of 10 researchers.

Sources:

  • NewsRx. Researchers from University of Texas Austin Describe Findings in Nanobodies (Resurfacing promotes antibacterial activity of a lipid A-binding nanobody). Nanotechnology Weekly. September 15, 2025; p 1489.
  • Resurfacing promotes antibacterial activity of a lipid A-binding nanobody. Proceedings of the National Academy of Sciences, 2025; 122(36).
  • Proceedings of the National Academy of Sciences. Natl Acad Sciences, 2101 Constitution Ave NW, Washington, DC 20418, USA. (National Academy of Sciences - www.nasonline.org/; Proceedings of the National Academy of Sciences - www.nasonline.org/publications/pnas/)