Equine bronchial epithelial cells differentiate into ciliated and mucus producing cells in vitro.

This research article presents a lab technique used to grow differentiated equine bronchial epithelial cells, which can aid in the study of airway diseases and how pathogens interact with hosts. These cells, which are isolated and grown at an air-liquid interface, differentiate into specialized ciliated and mucus producing cells, mimicking the types of cells found in respiratory diseases in horses.

Methodology

• The researchers have developed a new method for creating differentiated equine bronchial epithelial cell cultures for in vitro studies. This can be used to study disease mechanisms and how pathogens interact with their hosts.
• The method used by the researchers involves culturing these cells at an air-liquid interface (ALI) in a unique serum-free, hormone-supplemented medium. This is done using human tracheobronchial epithelial cells as a reference.
• The bronchial epithelial cells are isolated and then grown on T-Clear® insert membranes. In this environment, the cells differentiate into two primary types: ciliated cells and mucus producing cells.
• The differentiation of cells is observed and documented using both confocal and electron microscopy. They are able to verify the differentiation due to the unique attributes of the two kinds of cells.

Results

• Through this method, within a span of 2 to 3 weeks, cells differentiate into ciliated and mucus producing types, demonstrating the effectiveness of the technique.
• Along with this, the researchers found the presence of two key gel-forming mucin species, popularly known as Muc5ac and Muc5b, in their bronchial epithelial cell cultures. This is a critical discovery, as these two mucin species are common in many respiratory diseases and conditions.
• The identification of Muc5ac and Muc5b therefore validates the potential of this method for studying respiratory tract diseases in horses, showing a direct correlation to the encoding genes involved in such diseases.

Conclusion

• The method described in this paper provides a way to create ciliated and mucus producing cells from isolated bronchial epithelial cells, a significant step forward in the study of equine respiratory diseases.
• The result adds a valuable tool for researchers studying the mechanisms of respiratory diseases in horses and the interactions between these diseases and various pathogens. Using this new technique, researchers can better understand and devise countermeasures for these diseases that affect a large population of horses.