[A drawing of the brain. Photo Credit: Pixabay]

In a study released in May in the the Journal of Extracellular Vesicles, researchers at Texas A&M University have developed a nasal spray that seems to reverse brain aging by reducing inflammation and reestablishing the brain's energy systems.

After just two doses, the medication increased brain cell activity, decreased chronic inflammation, and restored memory.

The researchers believe these results may eventually lead to new treatments for diseases like dementia and Alzheimer's disease that are linked to aging and cognitive loss. 

Scientists have long recognized that low-level inflammation in aging brains is common and referred to as neuroinflammaging. 

Memory, cognition, and the brain's capacity to adjust to novel circumstances can all be hampered by this persistent inflammation. 

Moreover, it is thought to play a significant role in neurodegenerative illnesses, but now, this procedure might not be irreversible after all. 

Brain age-related disorders, such as dementia, are a major global health concern and these researchers have demonstrated that brain aging can be reversed to help people stay mentally sharp, socially engaged, and free from age-related deterioration. 

Extracellular vesicles (EVs), microscopic biological particles, form the basis of the treatment. 

Genetic material is spontaneously transported between cells through these microscopic structures. 

In this instance, they were loaded with microRNAs, molecules that aid in controlling crucial brain biological processes. 

Numerous genes and signaling pathways in the brain are modulated and regulated by microRNAs, which function as master regulators. 

By using a nasal spray to administer the EVs, researchers were able to bypass the brain's protective layer and enter brain tissue directly.

One of the most compelling aspects of the strategy is the route of administration, which enables researchers to directly access and treat the brain without the need for invasive operations.

Once inside the brain, the therapy targets immune cells responsible for persistent inflammation. 

The researchers reported that the medication inhibited inflammatory systems such the cGAS-STING signaling pathways and the NLRP3 inflammasome, both of which are closely associated with brain inflammation associated with aging. 

The therapy extended beyond merely reducing inflammation.

Additionally, researchers found that it restored function in mitochondria, the microscopic organelles inside cells that provide energy. 

Inflammation and aging can damage mitochondria, making brain cells less effective and more susceptible to deterioration.

The treatment appeared to help brain cells regain their capacity to process and store information by enhancing mitochondrial function. 

The enhancements extended beyond biological measurements, as behavioral tests revealed that treated models greatly outperformed untreated models on recognition and memory tasks.

Compared to untreated controls, they were more adept at distinguishing both new and familiar things and changes in their environment.

Researchers noted that the brain's natural repair mechanisms were activated, reducing inflammation and regenerating itself.

Most notably, after just two doses, the effects manifested rapidly and persisted for months. 

A straightforward, two-dose nasal spray may soon take the place of intrusive, dangerous procedures or even months of medication. 

Conducted by research experts Drs. Madhu Leelavathi Narayana and Maheedhar Kodali, the study was headed by Dr. Ashok Shetty, a professor at Texas A&M University and associate director of the Institute for Regenerative Medicine.