For decades, “neuroinflammaging”—a slow, chronic inflammatory process that leads to cognitive decline and memory loss—was considered an inevitable and natural consequence of aging. However, a new large-scale study conducted by the Texas A&M University College of Medicine shows that stopping, and even reversing, this process is entirely possible.
Scientists have developed a nasal spray that utilizes microscopic biological carriers to deliver medication directly to the brain. According to the study published in the Journal of Extracellular Vesicles, the application of just two doses significantly reduced chronic inflammation, reactivated cellular “powerhouses” (mitochondria), and restored memory and cognitive functions.
Key Research Findings
The study revealed a rapid and long-lasting therapeutic effect. Significant improvement in cognitive functions was recorded within just a few weeks; most notably, the results achieved after only two doses remained stable for several months.
The universal effectiveness of the method is particularly striking. Unlike many medical studies where results often vary by sex, this therapy demonstrated identical and equally high efficacy in both male and female models.
The therapy led to significant behavioral recovery. The models regained the ability to recognize familiar objects and adapt to changes in their environment. According to the scientists, this is one of the primary indicators of a healthy and functional memory center.
Regarding clinical perspectives, Texas A&M University has already filed a patent application for the therapy.
How Does the Innovative Spray Work?
Chronic inflammatory processes in the brain not only hinder the formation of new memories and thinking but also significantly increase the risk of developing Alzheimer’s and other neurodegenerative diseases. Unlike traditional approaches, the new therapy is based on extracellular vesicles (EVs), which function as a delivery system carrying genetic material: microRNAs.
As the lead authors of the study note, microRNAs act as master regulators for numerous genes within the brain. In the form of a nasal spray, these microscopic vesicles bypass the blood-brain barrier and are absorbed directly into the brain tissue.
Upon reaching the cellular level, the microRNA suppresses systems that trigger chronic inflammation, such as the NLRP3 inflammasome and cGAS–STING signaling pathways. Concurrently, the therapy reduces oxidative stress and activates neuronal mitochondria, thereby restoring the physical capacity of brain cells to process and store information.
Future Applications
The research team states that this approach redefines the concept of aging. In the future, this innovative therapy may replace invasive procedures or long-term medication. Beyond age-related cognitive decline, scientists believe the method will be effective for restoring lost functions in stroke patients and slowing the progression of Alzheimer’s disease.
