part_of part of basal cell respiratory basal cell 2011-06-21T03:11:10Z A basal cell in the respiratory tract. airway basal stem cell Respiratory basal cells are highly specialized cells that serve a crucial role in the human airway epithelium, predominantly found lining the surfaces of the trachea and bronchi. These cells exhibit a distinctive columnar shape and are attached directly to the basal lamina. They are characterized by the presence of high amounts of cytoplasmic keratins, predominantly keratin 5 and 14, and transcription factor tumor protein (tp63), which set them apart from other types of lung epithelial cells such as ciliated cells and secretory cells. Basal cells are essential for maintaining airway integrity. They make up one third of all respiratory epithelial cells and serve as stem cells as they can transform into different cell types, like goblet cells, ciliated cells, and club cells, when needed for homeostatic maintenance of the epithelial barrier or to repair and restore a healthy cellular environment after injury. Their position at the interface between the internal environment and the external atmosphere makes these cells a first line of defense against air-borne irritants, allergens, and pathogens. Their robust, intrinsic reparative properties facilitate effective recovery from such adversities. However, damage to respiratory basal cells or abnormalities in their function are associated with several respiratory pathologies such as asthma, chronic obstructive pulmonary disease, and lung cancer. Therefore, understanding these cells' function, and their role in disease, is crucial for the development of new therapeutic strategies for respiratory disorders. (This extended description was generated by ChatGPT and reviewed by the CellGuide team, who added references, and by the CL editors, who approved it for inclusion in CL. It may contain information that applies only to some subtypes and species, and so should not be considered definitional.) airway basal cell respiratory tract epithelium