{"id":2868,"date":"2026-10-12T06:05:32","date_gmt":"2026-10-12T06:05:32","guid":{"rendered":"https:\/\/xesi.net\/?p=2868"},"modified":"2026-10-12T06:05:32","modified_gmt":"2026-10-12T06:05:32","slug":"breakthrough-3d-model-reveals-secret-regenerative-powers-of-nasal-stem-cells","status":"publish","type":"post","link":"https:\/\/xesi.net\/?p=2868","title":{"rendered":"Breakthrough 3D Model Reveals Secret Regenerative Powers of Nasal Stem Cells"},"content":{"rendered":"

In a significant advancement for sensory science, researchers at Tufts University School of Medicine and the Graduate School of Biomedical Sciences (GSBS) have unveiled a sophisticated three-dimensional model designed to study the regeneration of nerve tissue within the nose. This innovative research, published in the journal Cell Reports Methods<\/em>, has led to the discovery that a specific type of stem cell\u2014long presumed to be largely dormant\u2014actually plays a pivotal role in maintaining and repairing the sense of smell.<\/p>\n

The human olfactory system is a marvel of biological resilience. Unlike the neurons in the central nervous system, which are notoriously difficult to repair once damaged, the sensory neurons housed in the nasal cavity possess a remarkable, lifelong capacity for regeneration. This ability allows humans to recover their sense of smell even after persistent exposure to environmental toxins, airborne pathogens, and the natural wear and tear of aging. However, this regenerative capacity is not infinite. Viral infections, such as those caused by SARS-CoV-2, chronic exposure to pollutants, and the degenerative effects of aging can severely impair the function of these cells, often leading to a diminished sense of smell or, in some cases, total anosmia.<\/p>\n

Unlocking the Mechanics of Olfactory Regeneration<\/h3>\n

To better understand why this biological process falters in some individuals and how it might be restored, the Tufts research team developed a new, three-dimensional olfactory tissue model\u2014an organoid. By creating a simplified, lab-grown environment that mimics the complex cellular landscape of the nose, scientists are now able to observe, in real-time, the mechanisms by which new neurons are generated and identify the specific cellular roadblocks that arise during disease or aging.<\/p>\n

The study centers on the interplay between two distinct types of stem cells found within the nasal epithelium: horizontal basal cells (HBCs) and globose basal cells (GBCs). For years, the scientific consensus held that GBCs were the primary engine of neurogenesis, while HBCs were viewed as a dormant reserve, only activated in the event of catastrophic tissue injury.<\/p>\n

However, the findings from the Tufts team suggest a far more nuanced reality. "Our research suggests that these two stem cells may be interdependent," explains Brian Lin, senior author of the study and a research assistant professor in the Department of Developmental, Molecular and Chemical Biology at Tufts. "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

By utilizing their new organoid model, the researchers identified a specific subpopulation of HBCs, characterized by the production of the protein KRT5. These cells appear to be active participants in the regenerative process rather than mere bystanders. When the team selectively depleted these KRT5-positive HBCs from the organoid cultures, the formation of new olfactory neurons was significantly impaired. This finding effectively reframes the role of HBCs, suggesting they are essential, active players in maintaining the structural and functional integrity of the olfactory system.<\/p>\n

The Influence of Aging on Sensory Function<\/h3>\n

Beyond mapping the regenerative process, the team sought to investigate why the sense of smell often fades as individuals grow older. By comparing cells derived from mice of varying ages, the researchers observed a clear decline in the regenerative capacity of older tissue. <\/p>\n

"We also looked at cells from mice of different ages and grew them in the model," Lin notes. "We found a decline in the ability of the older mice cells to generate new neurons. We think this is due to a decrease in the GBC population as we age, but we need to do more work to test this hypothesis and if so, develop ways to rejuvenate them."<\/p>\n

This hypothesis opens new avenues for therapeutic intervention. If the decline in smell is indeed linked to a depletion or functional failure of GBC populations, future research could focus on techniques to stimulate these cells or provide the necessary support to reinvigorate the nasal environment, effectively reversing age-related olfactory loss.<\/p>\n

Accessibility and the Future of Olfactory Research<\/h3>\n

The development of the organoid model itself is a notable achievement in terms of scientific accessibility. The lead author of the study, Juliana Gutschow Gameiro\u2014a former Ph.D. student who visited the GSBS from the State University of Londrina in Brazil\u2014prioritized the creation of a system that is both simple to replicate and cost-effective.<\/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

By lowering the barrier to entry for studying olfactory tissue, the Tufts team hopes to catalyze a broader, interdisciplinary effort to address the mechanisms of sensory loss. As the prevalence of olfactory dysfunction has become more widely recognized in the wake of the COVID-19 pandemic, the demand for high-quality, reproducible models has never been greater.<\/p>\n

Toward Human Clinical Applications<\/h3>\n

While the mouse-derived organoid has provided significant insights, the team\u2019s ultimate objective is to translate these findings into a human organoid model. Such a tool would be invaluable for pre-clinical drug screening, allowing researchers to test potential therapies for smell loss in a human-relevant context without the ethical and logistical complexities of whole-animal testing.<\/p>\n

Organoids\u2014miniature, three-dimensional versions of organs\u2014have become a standard tool in modern biomedical research, offering a faster and often more effective alternative to traditional cell cultures. To date, scientists have successfully developed organoids for various organs, including the lungs and kidneys, but human olfactory tissue remains a difficult frontier.<\/p>\n

"It’s challenging to get pure olfactory tissue from humans," Lin explains. The standard collection procedure involves anesthetizing a patient and using a brush\u2014similar in appearance to a COVID-19 test wand\u2014to sample the deep recesses of the nasal cavity. A major hurdle in this process is that the samples retrieved often contain a mixture of respiratory and olfactory stem cells, which are notoriously difficult to isolate from one another.<\/p>\n

The team\u2019s next phase of research is dedicated to overcoming this technical obstacle. By developing a simple, inexpensive technique to separate human olfactory stem cells from respiratory cells and successfully cultivating them in the lab, the researchers aim to create a robust platform for testing drugs intended to restore the sense of smell. <\/p>\n

As the research progresses, the ability to study these delicate cells in a controlled, 3D environment may eventually provide the key to helping millions of people regain a sense that is fundamental to their quality of life, memory, and safety. For now, the Tufts model stands as a promising foundation, proving that even the most overlooked "dormant" cells may hold the secret to sensory restoration.<\/p>\n","protected":false},"excerpt":{"rendered":"

In a significant advancement for sensory science, researchers at Tufts University School of Medicine and the Graduate School of Biomedical Sciences (GSBS) have unveiled a sophisticated three-dimensional model designed to study the regeneration of nerve tissue within the nose. This innovative research, published in the journal Cell Reports Methods, has led to the discovery that […]<\/p>\n","protected":false},"author":1,"featured_media":2867,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[650],"tags":[1823,2672,652,451,656,3893,4963,4688,666,667,2671,651],"class_list":["post-2868","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health-and-wellness","tag-breakthrough","tag-cells","tag-fitness","tag-health","tag-model","tag-nasal","tag-powers","tag-regenerative","tag-reveals","tag-secret","tag-stem","tag-wellness"],"_links":{"self":[{"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/posts\/2868","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=2868"}],"version-history":[{"count":0,"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/posts\/2868\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=\/wp\/v2\/media\/2867"}],"wp:attachment":[{"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2868"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xesi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}