The compounds in Aloë leaf exudates: a review
1985
Reynolds, T.
The drug Bitter Aloes has been used for several thousands of years because of its purgative properties and later several species of the plant have been cultivated for horticultural interest. In addition, many more local therapeutic properties have been recorded. Research has been largely directed towards the physiologically active components during the 50s and 60s. Extensions to this work in the last decade have been made in Germany, Japan and South Africa. Compounds have been characterized from the dried exudate prepared for drug purposes and from a few species. A number of anthraquinones have been recognized both in the free state and as glycosides. Other compounds with phenolic groups include chromones and a phenyl-pyranone. Chromatographic methods have been developed for recognizing some of these compounds and estimating the levels of those of pharmacological interest. Distribution of some of the compounds among a number of species is described showing that among some groups it has taxonomic significance. The biology of secretion and exudation from Aloë leaves remains largely unknown although fragmentary evidence points to interesting and potentially useful activity in some of the components.
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