Cellular Localization of Monoamine Oxidase in Rat Salivary Glands

Abstract
After ligation of the excretory ducts and subsequent atrophy of the parenchymal cells of the rat sub‐maxillary and sublingual glands, a severe reduction of the MAO activity was demonstrated both biochemically (more than 60 per cent decrease expressed as activity per gland) and histochemically. Chronic postganglionic sympathectomy produced a much smaller diminution of the MAO activity in these glands. It is concluded that the major part of the MAO in rat salivary glands occurs in the parenchymal cells.