Off-campus UMass Amherst users: To download campus access dissertations, please use the following link to log into our proxy server with your UMass Amherst user name and password.
Non-UMass Amherst users: Please talk to your librarian about requesting this dissertation through interlibrary loan.
Dissertations that have an embargo placed on them will not be available to anyone until the embargo expires.
Author ORCID Identifier
Open Access Dissertation
Doctor of Philosophy (PhD)
Year Degree Awarded
Month Degree Awarded
Vincent M. Rotello
Richard W. Vachet
Gregory N. Tew
Alternative and Complementary Medicine | Bacterial Infections and Mycoses | Biochemistry | Food Chemistry | Medicinal Chemistry and Pharmaceutics | Nanomedicine | Other Immunology and Infectious Disease | Pathogenic Microbiology | Skin and Connective Tissue Diseases | Therapeutics
Multidrug-resistant (MDR) bacteria contribute to more than 700,000 annual deaths world-wide. Millions more suffer from limb amputations or face high healthcare treatment costs where prolonged and costly therapeutic regimens are used to counter MDR infections. While there is an international push to develop novel and more powerful antimicrobials to address the impending threat, one particularly interesting approach that has re-emerged are essential oils, phytochemical extracts derived from plant sources. While their antimicrobial activity demonstrates a promising avenue, their stability in aqueous media, limits their practical use in or on mammals. Inspired by the versatility of polymer nanotechnology and the sustainability of traditional medicine, I employed a hybridization approach to improve the stability and subsequently the antimicrobial activity of phytochemical extracts. This approach was accomplished through a crosslinked Nano-emulsification templating strategy, generating a highly robust and reproducible library of potent oil-in-water Nano-assemblies. These assemblies, stabilized using synthetic or natural polymers, demonstrated long-term shelf life, high stability in serum-containing aqueous environments, and most notably, were demonstrated to penetrate highly refractory biofilm infections, eliminating a broad-spectrum of pathogenic bacteria where accumulated resistance towards these materials were not observed during the course of laboratory experiments. Taken together, the technology presented herein, offers key insight into addressing MDR-associated infections with hopes that future platforms can be built from to tackle the rising dangers of MDR infections.
Landis, Ryan, "HYBRIDIZED POLYMERIC NANO-ASSEMBLIES: KEY INSIGHTS INTO ADDRESSING MDR INFECTIONS" (2019). Doctoral Dissertations. 1522.
Alternative and Complementary Medicine Commons, Bacterial Infections and Mycoses Commons, Biochemistry Commons, Food Chemistry Commons, Medicinal Chemistry and Pharmaceutics Commons, Nanomedicine Commons, Other Immunology and Infectious Disease Commons, Pathogenic Microbiology Commons, Skin and Connective Tissue Diseases Commons, Therapeutics Commons