title: Antioxidant enzymes in lymphocytes from normal subjects and patients with chronic lymphocytic leukaemia: increased glutathione peroxidase activity in CLL B lymphocytes.
abstract: The activities of several enzymes that protect against oxidative injury were determined in blood lymphocytes from patients with B chronic lymphocytic leukaemia (CLL) and from normal subjects. Similar glutathione reductase (GR), catalase and glucose-6-phosphate dehydrogenase (G6PD) activities were found in normal and CLL lymphocytes. Higher glutathione peroxidase (GP) activity was found in CLL lymphocytes. This activity in CLL B lymphocytes was 2-fold higher than that of normal B lymphocytes, and 3-fold higher than that of T lymphocytes from either source. Several disease processes have been associated with decreased glutathione peroxidase activity. Our finding with CLL B lymphocytes is believed to be the first example of an increased GP activity in a disease. It may reflect either the expansion of a rare type of B cell population or be an expression of the malignant process.
authors: New York University School of Medicine, Department of Medicine, N.Y.
authors: C M
authors: CM
authors: Farber
authors: D N
authors: DN
authors: Kanganis
authors: L F
authors: LF
authors: Liebes
authors: R
authors: R
authors: Silber
mesh_terms: D001402:B-Lymphocytes / Q000201:enzymology*; D002374:Catalase / Q000378:metabolism; D005954:Glucosephosphate Dehydrogenase / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism*; D005980:Glutathione Reductase / Q000378:metabolism; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000201:enzymology*; D010084:Oxidation-Reduction; D013601:T-Lymphocytes / Q000201:enzymology
chemical_list: D005954:Glucosephosphate Dehydrogenase; D002374:Catalase; D005979:Glutathione Peroxidase; D005980:Glutathione Reductase