Abstract
Alkaline phosphatase (AP) and gamma glutamyltranspeptidase (GGT) were studied in normal lymphoid cells and in 28 cases of human lymphomas (23 of non-Hodgkin's and 5 of Hodgkin's disease). The expression of AP was enhanced in several samples with a high proportion of mature B cells, particularly in centroblastic-centrocytic lymphoma, whereas tissues mainly composed of T cells always showed low levels of this enzyme. GGT levels were high in thymus, as well as in centroblastic-centrocytic lymphoma and other NHL, thus demonstrating no restriction to a particular cell lineage. Some B-cell neoplasms with cellular origin different from that of centroblastic-centrocytic lymphoma, such as chronic lymphocytic leukemia and centrocytic lymphoma, had low levels of both enzymes. The role of investigation with specific antibodies against these two enzymatic activities in the physiology of lymphoma cell membrane is discussed.
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