Search for your doctor or find doctors accepting new patients.
Find out about our hospital visiting hours and policies.
Log In to MyUCSDChart to access your medical information
Find out about our academic nursing program.
Inflammation is the hallmark of many human diseases, from infection to neurodegeneration. The chemical balance within a tissue is disturbed, resulting in the accumulation of reactive oxygen species (ROS) such as hydrogen peroxide, which can cause oxidative stress and associated toxic effects.
Adah Almutairi, PhD
Adah Almutairi, PhD, associate professor at the Skaggs School of Pharmacy and Pharmaceutical Sciences, the Department of NanoEngineering, and the Materials Science and Engineering Program at the University of California, San Diego, and colleagues have developed the first degradable polymer that is extremely sensitive to low but biologically relevant concentrations of hydrogen peroxide.
Their work is currently published in the online issue of the Journal of the American Chemical Society.
These polymeric capsules, or nanoparticles, are taken up by macrophages and neutrophils – immune system cells that rush to the site of inflammation. The nanoparticles then release their contents when they degrade in the presence of hydrogen peroxide produced by these cells.
“This is the first example of a biocompatible way to respond to oxidative stress and inflammation,” said Almutairi, director of the UC San Diego Laboratory of Bioresponsive Materials. “Because the capsules are tailored to biodegrade and release their cargo when encountering hydrogen peroxide, they may allow for targeted drug delivery to diseased tissue.”
Almutairi is looking to test this method in a model of atherosclerosis. “Cardiologists have long needed a non-invasive method to determine which patients are vulnerable to a heart attack caused by ruptured plaque in the arteries before the attack,” she said. “Since the most dangerous of plaques is inflamed, our system could provide a safe way to detect and treat this disease.”
Additional contributors to the study include Caroline de Gracia Lux, Shivanjali Joshi-Barr, Trung Nguyen, Enas Mahmoud, Eric Schopf and Nadezda Fomina.
This research was supported by the NIH Director’s New Innovator Award (1DP2OD006499-0) and a King Abdulaziz City for Science and Technology center grant to the Center of Excellence in Nanomedicine at UC San Diego.
# # #
Media Contact: Debra Kain, 619-543-6163, email@example.com
Official Web Site of the University of California, San Diego.