Specific esterase activity, a property generally ascribed to cells of granulocytic origin, was found in abnormal erythroid precursors obtained from the bone marrows of six patients with untreated erythroleukemia. These erythroblasts also showed nonspecific esterase activity. Neither specific nor nonspecific esterase activity was detected in erythroid precursors obtained from the bone marrows of...

Lymphocytes from a case of B-cell chronic lymphocytic leukemia (CLL) were obtained in a highly purified state from a therapeutic leukapheresis preparation. The CLL lymphocytes showed a fine, scattered, granular pattern of nonspecific esterase cytochemical reactivity with either alpha-naphthyl acetate (alpha NA) or alpha-naphthyl butyrate (alpha NB) substrate as opposed to the more focal pattern...

Nonspecific esterase zymograms of purified leukemic cells from a case of acute myelomonocytic leukemia (AMML) and from a case of acute non-B, non-T lymphocytic leukemia (ALL) were produced by isoelectric focusing and staining with alpha-naphthyl acetate (alpha NA) or alpha-naphthyl butyrate (alpha NB) substrate. A "myeloid" zymogram was found with AMML cells, which closely matched control monoc...

Lymphocytes from a case of B-cell chronic lymphocytic leukemia (CLI) were obtained in a highly purified state from a therapeutic leukapheresis preparation. The CLL lymphocytes showed a fine, scattered, granular pattern of nonspecific esterase cytochemical reactivity with either a-naphthyl acetate (aNA) or a-naphthyl butyrate (aNB) substrate as opposed to the more focal pattern of control (T) ly...

Monocyte nonspecific esterase has been purified from cultured cells of the acute myeloid leukemia cell line. ML-l. The purified enzyme shows the characteristic properties of the monocyte neutral serine carboxyI esterase, with high sensitivity to organophosphorus inhibitors and sodium fluoride inhibitor. The enzyme is a membrane protein which in the native state exists as a monomer of a mol wt o...

Monocyte nonspecific esterase has been purified from cultured cells of the acute myeloid leukemia cell line, ML-1. The purified enzyme shows the characteristic properties of the monocyte neutral serine carboxyl esterase, with high sensitivity to organophosphorus inhibitors and sodium fluoride inhibitor. The enzyme is a membrane protein which in the native state exists as a monomer of a mol wt o...

N.N. Kavtsevich Murmansk marine biological institute KSC RAS, 17, Vladimirskaya str., Murmansk, 183010, Staining of bottle-nosed dolphin lymphocytes by nonspecific esterase stain and E-rosette test were performed. 35.4 % of lymphocytes were simultaneously E-rosetted and NE positive. They are apparently, mature T-cells. On the size and shape of esterase-positive granules at least 2 subpopulation...