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. 1980 Apr;35:113–120. doi: 10.1289/ehp.8035113

Mucous membrane of respiratory epithelium.

L M Reid, R Jones
PMCID: PMC1568464  PMID: 6105955

Abstract

Of the eight epithelial cell types of the airway surface epithelium three are secretory, the mucous, serous and Clara cells: the first two are also found in the submucosal glands. Organ culture results indicate that the pattern of control of the surface cells is different from that of the glands. Our recent studies show that in the surface epithelium Clara and serous cells can quickly convert to mucous as do nonsecretory undifferentiated cells. The balance between the various cell types changes with airway level. The type of glycoprotein within the secretory granules is neutral or acid, sialylated or sulfated, and also shows a regional pattern. Homeostasis is maintained in the normal but the equilibrium is quickly upset by a variety of irritants, infection of drugs. Change in pattern of glycoprotein synthesis depends largely on change of granules. The granules at the cell apex change first. The nature and distribution of the various receptor binding sites is significant in patterns of control. This lability occurs in an intact epithelium and whether or not mitotic activity is increased. With irritation tolerance to stimulus develops. Antiinflammatory agents can protect against some of these cellular and intracellular events. Our organ culture studies and biochemical analysis of secretion complement the tissue studies. Recent studies show that isoproterenol and salbutamol (a nonselective beta agonist and a selective beta 2, respectively) alter the normal mix of cell types and quickly, but that they have different regional specificity.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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