{"id":3439,"date":"2026-10-18T22:05:26","date_gmt":"2026-10-18T22:05:26","guid":{"rendered":"https:\/\/xesi.net\/?p=3439"},"modified":"2026-10-18T22:05:26","modified_gmt":"2026-10-18T22:05:26","slug":"new-breakthrough-in-olfactory-research-scientists-uncover-hidden-regenerative-power-in-nasal-stem-cells","status":"publish","type":"post","link":"https:\/\/xesi.net\/?p=3439","title":{"rendered":"New Breakthrough in Olfactory Research: Scientists Uncover Hidden Regenerative Power in Nasal Stem Cells"},"content":{"rendered":"

In a significant stride toward understanding how the human body maintains the sense of smell, researchers at Tufts University School of Medicine and the Graduate School of Biomedical Sciences (GSBS) have unveiled a groundbreaking three-dimensional model that sheds new light on the regenerative potential of nasal tissue. The study, recently published in Cell Reports Methods<\/em>, reveals that a specific type of stem cell, long dismissed by the scientific community as dormant, plays a far more critical role in repairing and maintaining olfactory neurons than previously understood.<\/p>\n

Unlike most regions of the central nervous system, which have limited capacity for self-repair, the sensory neurons residing in the nasal cavity possess a remarkable, lifelong ability to regenerate. This continuous renewal process is essential, as these cells are frequently exposed to the harsh, unpredictable external environment, including toxins, pollutants, and pathogens. However, this delicate balance of constant regeneration can be disrupted by viral infections\u2014most notably COVID-19\u2014as well as by chronic exposure to environmental stressors or the natural progression of biological aging. When this regenerative machinery falters, individuals may experience partial or complete loss of smell, a condition that significantly impacts quality of life and, in some cases, serves as an early indicator of neurodegenerative diseases such as Parkinson\u2019s.<\/p>\n

To better investigate the mechanics of this decline, the Tufts research team, led by senior author Brian Lin, a research assistant professor in the Department of Developmental, Molecular and Chemical Biology, developed a novel, accessible three-dimensional olfactory tissue mouse model. These organoids\u2014miniaturized, simplified versions of organs grown in the laboratory\u2014provide a controlled environment for scientists to observe how neurons are continually formed within the nose and, crucially, why this vital process eventually wanes over time.<\/p>\n

Decoding the Interdependence of Nasal Stem Cells<\/h3>\n

The study centers on the complex relationship between two primary types of stem cells found within the nasal epithelium: horizontal basal cells (HBCs) and globose basal cells (GBCs). Traditionally, scientific consensus held that GBCs were the primary drivers of neurogenesis, acting as the "workhorses" that constantly divide and differentiate into mature olfactory neurons. In contrast, HBCs were widely characterized as a dormant reserve, activated only in extreme circumstances, such as severe tissue injury, to provide a backup layer of protection.<\/p>\n

However, the team\u2019s new organoid model challenges this binary understanding. By observing the cellular communication within the 3D structures, researchers discovered that these two populations are far more interdependent than previously thought. <\/p>\n

"Our research suggests that these two stem cells may be interdependent," says Lin. "One type that we thought was largely dormant\u2014HBCs\u2014may actually play a crucial role in supporting the production of new neurons and the repair of damaged tissue."<\/p>\n

Specifically, the team identified a subpopulation of HBCs, distinguished by the expression of the protein KRT5, that serves as an active participant in the regenerative cycle. When the researchers selectively depleted these KRT5-producing HBCs from the organoid cultures, the formation of new olfactory neurons was significantly impaired. This finding suggests that these cells are not merely "emergency responders" waiting in the wings, but are essential components of the daily maintenance and regenerative architecture of the nasal cavity.<\/p>\n

The team also utilized the model to investigate the impact of aging on these cells. By comparing olfactory tissue taken from mice of varying ages, they observed a distinct decline in the regenerative capacity of cells derived from older subjects. Preliminary analysis points toward a decrease in the GBC population as the primary driver of this age-related decline. "We think this is due to a decrease in the GBC population as we age," Lin notes, "but we need to do more work to test this hypothesis and, if so, develop ways to rejuvenate them."<\/p>\n

Democratizing Olfactory Research Through Accessible Models<\/h3>\n

A central objective for the researchers was to ensure that their findings and the underlying technology could be widely utilized by the broader scientific community. Juliana Gutschow Gameiro, the study\u2019s lead author and a former Ph.D. student visiting GSBS from the State University of Londrina in Brazil, played a pivotal role in the model’s development. Recognizing the barriers that high-cost, high-complexity equipment can pose to research, Gameiro focused on creating a methodology that is both robust and accessible to labs with limited funding.<\/p>\n

This push for accessibility is particularly timely. The COVID-19 pandemic, which caused widespread and often persistent olfactory dysfunction, triggered a surge of interest in the olfactory system across various medical and biological disciplines. <\/p>\n

"Because loss of smell is associated with COVID-19, as well as with Parkinson’s disease and other conditions, a much larger number of researchers from a variety of different fields have begun researching olfactory epithelial cells in the last few years," says Lin. "We wanted to develop an easy-to-use model so that non-stem cell biologists and those working in labs with limited resources could use it to better understand how olfactory neurons regenerate and what happens that causes that process to diminish or fail completely."<\/p>\n

The organoid platform offers a significant advantage over traditional animal testing or static cell cultures. By simulating the 3D environment of the nasal cavity, the model provides a more accurate representation of how cells interact in a living organism, while offering a faster and more cost-effective alternative to whole-animal studies.<\/p>\n

Toward a Future of Human-Derived Organoids<\/h3>\n

The successful development of the mouse-tissue organoid is viewed by the team as a foundational step toward their ultimate goal: the creation of a human-derived olfactory organoid. Such a tool would be invaluable for drug discovery, allowing researchers to screen pharmaceutical compounds in a human context to potentially treat patients suffering from permanent or severe loss of smell. <\/p>\n

While organoids have become a staple in modern research for studying organs such as the lungs, kidneys, and liver, the development of human olfactory organoids remains a formidable challenge. The primary obstacle is the difficulty in obtaining pure, high-quality olfactory stem cells from human patients. Currently, the standard collection method involves using a brush\u2014similar to those used for COVID-19 testing\u2014to swab the deep nasal cavity. However, in humans, the resulting sample is a mixture of respiratory stem cells and olfactory stem cells that are notoriously difficult to isolate from one another.<\/p>\n

The team is now pivoting their efforts to solve this technical hurdle. Their next phase of research focuses on developing a simple, cost-effective technique that can reliably separate human olfactory stem cells from respiratory cells. Once perfected, this method would allow these specialized cells to be cultured in the lab, clearing the path for human-specific organoid studies. By bridging the gap between mouse models and human clinical application, the Tufts team hopes to provide a lifeline for the millions of people worldwide whose sense of smell has been compromised by illness, trauma, or the inevitable passage of time.<\/p>\n","protected":false},"excerpt":{"rendered":"

In a significant stride toward understanding how the human body maintains the sense of smell, researchers at Tufts University School of Medicine and the Graduate School of Biomedical Sciences (GSBS) have unveiled a groundbreaking three-dimensional model that sheds new light on the regenerative potential of nasal tissue. The study, recently published in Cell Reports Methods, […]<\/p>\n","protected":false},"author":1,"featured_media":3438,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[650],"tags":[1823,2672,652,451,2485,3893,4753,208,4688,678,465,2671,1160,651],"class_list":["post-3439","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health-and-wellness","tag-breakthrough","tag-cells","tag-fitness","tag-health","tag-hidden","tag-nasal","tag-olfactory","tag-power","tag-regenerative","tag-research","tag-scientists","tag-stem","tag-uncover","tag-wellness"],"_links":{"self":[{"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/posts\/3439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3439"}],"version-history":[{"count":0,"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/posts\/3439\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/media\/3438"}],"wp:attachment":[{"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}