Abstract
Esterases are enzymes that cleave aliphatic and aromatic ester bonds. With the use of synthetic substrates, esterases can be demonstrated in hematopoietic cells. Using alpha naphthyl acetate or alpha naphthyl butyrate, nonspecific esterase activity can be demonstrated. Intense activity of nonspecific esterase that is inhibited by fluoride is characteristic of cells of monocytic or reticulum cell origin. Using naphthol ASD-chloroacetate, specific esterase activity can be detected. Specific esterase is a lysosomal enzyme and is a useful marker for cells of granulocytic origin. Distinctive patterns of specific and nonspecific esterase activities are found in marrow cells from patients with various types of hematologic disorders. With the use of electrophoretic techniques, isoenzymatic analysis of esterases can be achieved.
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