part of part of has part capable of acinar cell acinar cell of salivary gland 2011-03-14T02:22:22Z salivary gland acinar cell salivary acinar cell https://cellxgene.cziscience.com/cellguide/CL_0002623 An acinar cell that is part of the salivary gland epithelium, responsible for synthesizing and secreting the primary saliva essential for oral digestion, antimicrobial defense, and mucosal immunity. It features apical-basal polarity with apical secretory granules, and tight junctions that maintain polarity and regulate calcium-dependent saliva exocytosis triggered by parasympathetic and sympathetic signals (Ambudkar, 2015). This cell functions in coordination with contractile myoepithelial cells, which aid saliva flow through the ducts into the oral cavity (Khan et al., 2022). In mice and humans, acinar cell development relies on the transcription factor SOX2 (Emmerson et al., 2017), with self-renewal achieved primarily through acinar cell self-duplication and supported by progenitor populations during injury and regeneration (Aure et al., 2016). Acinar cells of the salivary gland are a critical part of the oral physiology and the digestive mechanism. These specialized cells are concentrated towards the terminal ends of the salivary glands, where they form sac-like acini or clusters. The primary function of these cells is to produce and secrete saliva. This substance, comprised mainly of water, electrolytes, mucins, and enzymes, is vital for the initial stages of digestion and for the regular maintenance of oral health. Acinar cells produce the two main types of saliva: serous and mucinous. Serous saliva contains the enzyme amylase responsible for the initial breakdown of complex carbohydrates and is predominantly produced by the parotid gland, the largest of salivary glands. The mucinous type, more common in the submandibular and sublingual glands, contains mucin that aids in lubrication, facilitating the process of mastication and bolus formation. Moreover, acinar cells also express and respond to various endocrine, paracrine, and autocrine hormones that govern the quantity and composition of the saliva produced. This implies sensitivity and modulation according to the internal and external environment, dietary habits, and even circadian rhythms. Impairment of acinar cells, whether due to damage or related to a systemic condition such as Sjögren's Syndrome, can disrupt the optimal functioning of the oral and digestive systems. In conclusion, acinar cells of the salivary gland have a substantial role in oral health and overall homeostasis. (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.) salivary gland glandular cell calcium-ion regulated exocytosis secretory granule innate immune response saliva secretion salivary gland epithelium