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  • 1
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    Human T Lymphocyte Colonies Require IL2 and are Inhibited by Anti-Tac (1987)
    Wiley
    Details
    Publication Date: 1987-02-01
    Print ISSN: 0818-9641
    Electronic ISSN: 1440-1711
    Topics: Biology , Medicine
    Published by Wiley
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  • 2
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    Defective glycosylation of erythrocyte membrane glycoconjugates in a variant of congenital dyserythropoietic anemia type II: association of low level of membrane-bound form of galactosyltransferase (1989)
    American Society of Hematology
    Details
    Publication Date: 1989-04-01
    Description: Congenital dyserythropoietic anemia type II (CDA II) or HEMPAS is a genetic disease caused by plasma membrane abnormality. The enzymic defect of HEMPAS has been suggested to be the lowered activity of N- acetylglucosaminyltransferase II, resulting in lack of polylactosamine formation on proteins and leading to accumulation of polylactosaminyl lipids. In contrast to typical HEMPAS cases, cell-surface labeling of the erythrocytes of a HEMPAS variant G.K. showed an absence of polylactosamines either on proteins or on lipids. Fast-atom bombardment mass spectrometry analysis of G.K.'s erythrocyte glycopeptides detected a series of high mannose-type oligosaccharides, which were not detected in erythrocyte N-glycans of normal cells or of other HEMPAS cases: The former contains polylactosaminoglycans and the latter contains hybrid- type oligosaccharides. Keratansulfate (sulfated polylactosamines) in this patient's serum was abnormally low. The galactosyltransferase activity in microsomal membranes prepared from G.K.'s mononucleated cells was 24% of the normal level, whereas this enzyme activity in G.K.'s serum was comparatively higher than normal. Western blotting of G.K.'s membranes using antigalactosyltransferase antibodies showed that G.K. has reduced amounts of this enzyme present. The results collectively suggest that variant G.K. is defective in polylactosamine synthesis owing to the decreased quantity of the membrane-bound form of galactosyltransferase.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
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  • 3
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    Etoposide in acute nonlymphocytic leukemia. Australian Leukemia Study Group (1990)
    American Society of Hematology
    Details
    Publication Date: 1990-01-01
    Description: Previously untreated patients with acute nonlymphocytic leukemia (ANLL) aged 15 to 70 years were randomized to either cytosine arabinoside 100 mg/m2/d continuous intravenous (IV) infusion days 1 through 7, daunorubicin 50 mg/m2/d IV days 1 through 3 (7–3), or the same drugs intensified with etoposide 75 mg/m2/d IV days 1 through 7 (7–3–7) as induction therapy. Patients achieving complete remission (CR) received two courses of consolidation therapy (5–2 or 5–2–5) followed by maintenance therapy. Of 264 eligible patients, CR occurred in 56% of 7– 3 and 59% of 7–3–7 patients; 7–3–7 significantly improved remission duration (P = .01). The median remission duration was 12 months for 7–3 and 18 months for 7–3–7. Survival was similar when the two arms were compared overall. Subset analysis performed to identify patients with the most benefit showed that etoposide significantly prolonged remission duration in younger patients (less than 55 years) with a median of 12 months for 7–3 and 27 months for 7–3–7 (P = .01). Survival appeared to be prolonged with 7–3–7 in patients aged less than 55 years, with a median of 9 months for 7–3 as compared with 17 months for 7–3–7 (P = .03). In older patients (aged greater than or equal to 55 years), 7–3–7 was more toxic, with significantly more severe [World Health Organization (WHO) grade 3 or 4] stomatitis (P = .02) and no additional clinical benefit. Hematologic toxicity for induction courses was similar, with granulocytopenia less than 0.5 x 10(9)/L for a median of 16 days per course for 7–3 and 15 days for 7–3–7. Hematologic toxicity was more severe for 5–2–5 consolidation courses (P = .003). Induction and consolidation therapy intensified with etoposide resulted in significantly improved remission duration but not survival.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
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  • 4
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    Intensive leukapheresis as initial therapy for chronic granulocytic leukemia (1975)
    American Society of Hematology
    Details
    Publication Date: 1975-12-01
    Description: Intensive leukapheresis has been used as the initial treatment of chronic granulocytic leukemia (CGL) in six patients. The number of leukaphereses ranged from 3 in 7 days to 13 in 39 days (mean, 8 in 22 days). The procedures were well tolerated, and in all patients there was improvement in hematologic values, in most cases with considerable reduction in the peripheral leukocytosis and thrombocytosis and in the proportion of immature granulocytic cells in the circulation. Splenomegaly decreased considerably in the four patients who had more than four leukaphereses. Symptoms of sweating, malaise, and pain due to splenomegaly were rapidly relieved. Problems due to hyperuricemia did not occur, but four patients required blood transfusions for correction of anemia. This method of initial treatment of CGL appears to give more rapid relief of symptoms than does conventional chemotherapy; it incurs no risk of hyperuricemia and lessens that associated with thrombocytosis. In addition, large quantities of granulocyte-rich plasma are made available for the treatment of infections in neutropenic patients. Intensive leukapheresis deserves more widespread evaluation as the initial treatment of CGL.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
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  • 5
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    Unknown
    Intensive leukapheresis as initial therapy for chronic granulocytic leukemia (1975)
    American Society of Hematology
    Details
    Publication Date: 1975-12-01
    Description: Intensive leukapheresis has been used as the initial treatment of chronic granulocytic leukemia (CGL) in six patients. The number of leukaphereses ranged from 3 in 7 days to 13 in 39 days (mean, 8 in 22 days). The procedures were well tolerated, and in all patients there was improvement in hematologic values, in most cases with considerable reduction in the peripheral leukocytosis and thrombocytosis and in the proportion of immature granulocytic cells in the circulation. Splenomegaly decreased considerably in the four patients who had more than four leukaphereses. Symptoms of sweating, malaise, and pain due to splenomegaly were rapidly relieved. Problems due to hyperuricemia did not occur, but four patients required blood transfusions for correction of anemia. This method of initial treatment of CGL appears to give more rapid relief of symptoms than does conventional chemotherapy; it incurs no risk of hyperuricemia and lessens that associated with thrombocytosis. In addition, large quantities of granulocyte-rich plasma are made available for the treatment of infections in neutropenic patients. Intensive leukapheresis deserves more widespread evaluation as the initial treatment of CGL.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
    Location Call Number Expected Availability
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    PAPER CURRENT
  • 6
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    Unknown
    Defective glycosylation of erythrocyte membrane glycoconjugates in a variant of congenital dyserythropoietic anemia type II: association of low level of membrane-bound form of galactosyltransferase (1989)
    American Society of Hematology
    Details
    Publication Date: 1989-04-01
    Description: Congenital dyserythropoietic anemia type II (CDA II) or HEMPAS is a genetic disease caused by plasma membrane abnormality. The enzymic defect of HEMPAS has been suggested to be the lowered activity of N- acetylglucosaminyltransferase II, resulting in lack of polylactosamine formation on proteins and leading to accumulation of polylactosaminyl lipids. In contrast to typical HEMPAS cases, cell-surface labeling of the erythrocytes of a HEMPAS variant G.K. showed an absence of polylactosamines either on proteins or on lipids. Fast-atom bombardment mass spectrometry analysis of G.K.'s erythrocyte glycopeptides detected a series of high mannose-type oligosaccharides, which were not detected in erythrocyte N-glycans of normal cells or of other HEMPAS cases: The former contains polylactosaminoglycans and the latter contains hybrid- type oligosaccharides. Keratansulfate (sulfated polylactosamines) in this patient's serum was abnormally low. The galactosyltransferase activity in microsomal membranes prepared from G.K.'s mononucleated cells was 24% of the normal level, whereas this enzyme activity in G.K.'s serum was comparatively higher than normal. Western blotting of G.K.'s membranes using antigalactosyltransferase antibodies showed that G.K. has reduced amounts of this enzyme present. The results collectively suggest that variant G.K. is defective in polylactosamine synthesis owing to the decreased quantity of the membrane-bound form of galactosyltransferase.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
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    PAPER CURRENT
  • 7
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    Unknown
    Etoposide in acute nonlymphocytic leukemia. Australian Leukemia Study Group (1990)
    American Society of Hematology
    Details
    Publication Date: 1990-01-01
    Description: Previously untreated patients with acute nonlymphocytic leukemia (ANLL) aged 15 to 70 years were randomized to either cytosine arabinoside 100 mg/m2/d continuous intravenous (IV) infusion days 1 through 7, daunorubicin 50 mg/m2/d IV days 1 through 3 (7–3), or the same drugs intensified with etoposide 75 mg/m2/d IV days 1 through 7 (7–3–7) as induction therapy. Patients achieving complete remission (CR) received two courses of consolidation therapy (5–2 or 5–2–5) followed by maintenance therapy. Of 264 eligible patients, CR occurred in 56% of 7– 3 and 59% of 7–3–7 patients; 7–3–7 significantly improved remission duration (P = .01). The median remission duration was 12 months for 7–3 and 18 months for 7–3–7. Survival was similar when the two arms were compared overall. Subset analysis performed to identify patients with the most benefit showed that etoposide significantly prolonged remission duration in younger patients (less than 55 years) with a median of 12 months for 7–3 and 27 months for 7–3–7 (P = .01). Survival appeared to be prolonged with 7–3–7 in patients aged less than 55 years, with a median of 9 months for 7–3 as compared with 17 months for 7–3–7 (P = .03). In older patients (aged greater than or equal to 55 years), 7–3–7 was more toxic, with significantly more severe [World Health Organization (WHO) grade 3 or 4] stomatitis (P = .02) and no additional clinical benefit. Hematologic toxicity for induction courses was similar, with granulocytopenia less than 0.5 x 10(9)/L for a median of 16 days per course for 7–3 and 15 days for 7–3–7. Hematologic toxicity was more severe for 5–2–5 consolidation courses (P = .003). Induction and consolidation therapy intensified with etoposide resulted in significantly improved remission duration but not survival.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
    Location Call Number Expected Availability
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    PAPER CURRENT
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