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Doxorubicin and the alkylating anthracycline 3'-deamino-3'-(3-cyano-4-morpholinyl) doxorubicin: comparative in vitro potency against leukemia and bone marrow cells. 1988

R A Beckman, and P J McFall, and B I Sikic, and S D Smith
Department of Pediatrics, Stanford University School of Medicine, CA 94305.

The new anthracycline analogue 3'-deamino-3'-(3-cyano-4-morpholinyl) doxorubicin (MRA-CN) is an intensely potent compound that has been shown to be 100-1,000 times more potent than doxorubicin (DOX) in vivo and in vitro. In addition, MRA-CN has been non-cross-resistant with DOX in DOX-selected models of multidrug resistance. We now report the effect of MRA-CN (and DOX) on leukemia cell lines established from patients with common, T-cell, and B-cell acute lymphoblastic leukemia, as well as with monoblastic leukemia. The effect of MRA-CN on the leukemia cells was compared to its toxicity on normal myeloid progenitors (therapeutic ratio) and to the effect of DOX on the leukemia and normal cells. MRA-CN was found to be 100 times more potent than DOX against normal myeloid progenitors--colony-forming units, granulocyte-macrophage (CFU-GM)--and 40-240 times more potent than DOX against leukemia cell lines. In addition, the therapeutic ratio was uniformly greater than 1, indicating that each leukemia cell line tested was more sensitive than CFU-GM to MRA-CN in vitro. There was a lack of correlation between MRA-CN and DOX at a drug concentration at which the colony formation is inhibited by 50% in the leukemia cell lines (correlation coefficient = 0.38), which supported the previous reports of non-cross-resistance between these two agents. The favorable therapeutic ratio, the non-cross-resistance with DOX, and the previously described lack of cardiac toxicity all make MRA-CN an attractive candidate for clinical trials in patients with acute leukemia.

UI MeSH Term Description Entries
D007938 Leukemia A progressive, malignant disease of the blood-forming organs, characterized by distorted proliferation and development of leukocytes and their precursors in the blood and bone marrow. Leukemias were originally termed acute or chronic based on life expectancy but now are classified according to cellular maturity. Acute leukemias consist of predominately immature cells; chronic leukemias are composed of more mature cells. (From The Merck Manual, 2006) Leucocythaemia,Leucocythemia,Leucocythaemias,Leucocythemias,Leukemias
D001853 Bone Marrow The soft tissue filling the cavities of bones. Bone marrow exists in two types, yellow and red. Yellow marrow is found in the large cavities of large bones and consists mostly of fat cells and a few primitive blood cells. Red marrow is a hematopoietic tissue and is the site of production of erythrocytes and granular leukocytes. Bone marrow is made up of a framework of connective tissue containing branching fibers with the frame being filled with marrow cells. Marrow,Red Marrow,Yellow Marrow,Marrow, Bone,Marrow, Red,Marrow, Yellow
D004317 Doxorubicin Antineoplastic antibiotic obtained from Streptomyces peucetius. It is a hydroxy derivative of DAUNORUBICIN. Adriamycin,Adriablastin,Adriablastine,Adriblastin,Adriblastina,Adriblastine,Adrimedac,DOXO-cell,Doxolem,Doxorubicin Hexal,Doxorubicin Hydrochloride,Doxorubicin NC,Doxorubicina Ferrer Farm,Doxorubicina Funk,Doxorubicina Tedec,Doxorubicine Baxter,Doxotec,Farmiblastina,Myocet,Onkodox,Ribodoxo,Rubex,Urokit Doxo-cell,DOXO cell,Hydrochloride, Doxorubicin,Urokit Doxo cell
D004351 Drug Resistance Diminished or failed response of an organism, disease or tissue to the intended effectiveness of a chemical or drug. It should be differentiated from DRUG TOLERANCE which is the progressive diminution of the susceptibility of a human or animal to the effects of a drug, as a result of continued administration. Resistance, Drug
D006412 Hematopoietic Stem Cells Progenitor cells from which all blood cells derived. They are found primarily in the bone marrow and also in small numbers in the peripheral blood. Colony-Forming Units, Hematopoietic,Progenitor Cells, Hematopoietic,Stem Cells, Hematopoietic,Hematopoietic Progenitor Cells,Cell, Hematopoietic Progenitor,Cell, Hematopoietic Stem,Cells, Hematopoietic Progenitor,Cells, Hematopoietic Stem,Colony Forming Units, Hematopoietic,Colony-Forming Unit, Hematopoietic,Hematopoietic Colony-Forming Unit,Hematopoietic Colony-Forming Units,Hematopoietic Progenitor Cell,Hematopoietic Stem Cell,Progenitor Cell, Hematopoietic,Stem Cell, Hematopoietic,Unit, Hematopoietic Colony-Forming,Units, Hematopoietic Colony-Forming
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000903 Antibiotics, Antineoplastic Chemical substances, produced by microorganisms, inhibiting or preventing the proliferation of neoplasms. Antineoplastic Antibiotics,Cytotoxic Antibiotics,Antibiotics, Cytotoxic
D014407 Tumor Cells, Cultured Cells grown in vitro from neoplastic tissue. If they can be established as a TUMOR CELL LINE, they can be propagated in cell culture indefinitely. Cultured Tumor Cells,Neoplastic Cells, Cultured,Cultured Neoplastic Cells,Cell, Cultured Neoplastic,Cell, Cultured Tumor,Cells, Cultured Neoplastic,Cells, Cultured Tumor,Cultured Neoplastic Cell,Cultured Tumor Cell,Neoplastic Cell, Cultured,Tumor Cell, Cultured

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