WSU Develops Potential Endometriosis Treatment in Mice

A single injection that could transform life for millions of women living with debilitating pain just moved one step closer to reality.

Washington State University researchers have engineered a targeted nanotherapy that dramatically reduced endometriosis symptoms in mice after just one dose. The breakthrough offers hope for roughly 190 million women worldwide who battle this chronic disease, which can cause severe pain so intense that some patients can't get out of bed.

Endometriosis occurs when tissue similar to the uterine lining grows outside the uterus, causing severe cramps, chronic pelvic pain, and sometimes infertility. Currently, there's no cure, and most patients wait 7 to 10 years just to get diagnosed.

Professor Kanako Hayashi from WSU's School of Molecular Biosciences led the team behind this potential game changer. They tackled a stubborn problem: identifying disease-specific immune cells and then figuring out how to deliver medication directly to them without harming healthy tissue.

The solution combined an approved drug called niclosamide with a nano-sized molecule that acts like a targeted delivery system. The nanocarrier brings the medicine straight to problem cells at the disease site, leaving everything else untouched.

In laboratory testing, one injection delivered impressive results. Mice showed reduced lesion size and number, less sensitivity to pain, and decreased inflammation. The treatment remained stable for two weeks, with researchers optimistic they can extend that to a month.

"Endometriosis isn't life-threatening, but for some women, it can destroy their life," Hayashi said. The hope is a once-a-month injection that patients could receive at their doctor's office and then go home.

The Ripple Effect

Beyond pain relief, this research addresses a disease that's been historically understudied and underfunded. For women who've felt hopeless navigating years of symptoms before diagnosis and limited treatment options, this represents meaningful progress.

The treatment could also help women struggling with infertility caused by endometriosis. By targeting the immune system dysfunction that researchers believe allows the disease to take hold, the therapy addresses the root problem rather than just masking symptoms.

The WSU team is now working with the university's Office of Entrepreneurship and Innovation to pursue patents and commercialization. They're seeking support to test the technology and move toward drug approval, with human trials potentially five years away.

The research team included collaborators from the University of Michigan and University of Florida. Their findings were published in the journal "Advanced Healthcare Materials."

Women who've spent years managing chronic pain finally have reason for optimism.