Using copper as an antimicrobial
Copper was first used to sterilize wounds between 2600 and 2200 BC, and today, its power to kill bacteria still works. Researchers are hoping to one day use copper to create new antibiotics for a strain of pneumonia.
Genie Street has had pneumonia three times. It’s left her with asthma and permanent lung damage.
“I was just devastated. I was just so upset, just, I don’t know, it just takes all the hope from you. And it’s a horrible disease,” said Street.
Her doctors told her only one antibiotic will work for her. So, she’s closely watching research on how copper may help develop new ones.
Michael D. L. Johnson, PhD, Assistant Professor of Immunobiology at the University of Arizona said, “With a bacteria that still kills one point five million people per year, with 50 percent of those being under the age of five, we’re trying to find new treatments, and we’re doing that through copper.”
Streptococcus pneumoniae causes pneumonia, ear infections, meningitis, and pink eye. Copper is toxic to the bacteria. Right now, Johnson is focusing on disrupting the copY protein, which helps bacteria get rid of copper.
“All of a sudden, the bacteria can’t cause disruption anymore. Oh, yeah, we have a potential therapeutic target,” said Johnson.
He has a compound with copper in vitro studies now that’s killed 99.9 percent of the bacteria in a couple of hours. He’s encouraged by that, and so is Street.
Street said, “The bad bugs are winning, and antibiotics are losing, so if there would be something as simple and as easy as copper, it sounds marvelous to me.”
Especially with antibiotic resistance rising, and few new drug options.
Johnson says his team is making faster progress now on figuring out the basic science of how copper works. He believes patients in the future will fight off bacterial infections by getting copper in their regular diet, from root vegetables, then adding the drug compound in a cream or a mist. But clinical trials are still a long way off.
Contributors to this news report include: Wendy Chioji, Field Producer; Bruce Maniscalco, Videographer; Cyndy McGrath, Supervising Producer; Ken Ashe, Editor.