bruceantin/лейкоз

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Antitumor agents. XXXV: Effects of brusatol, bruceoside A, and bruceantin on P-388 lymphocytic leukemia cell respiration.

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Brusatol, a quassinoid with potent antineoplastic activity against P-388 lymphocytic leukemia cell proliferation, significantly inhibited P-388 cell hexokinase, phosphofructokinase, malic dehydrogenase, and succinic dehydrogenase. Mitochondrial oxidative phosphorylation, basal, and adenosine

Antitumor agents XLVI: In vitro effects of esters of brusatol, bisbrusatol, and related compounds on nucleic acid and protein synthesis of P-388 lymphocytic leukemia cells.

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A series of esters of brusatol, bisbrusatol, and bruceantin were shown to have potent antileukemic activity. Antineoplastic activity was correlated with the ability of the compounds to suppress DNA and protein synthesis in P-388 lymphocytic leukemia cells. Compounds with high T/C% values

Multiple myeloma regression mediated by bruceantin.

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OBJECTIVE Bruceantin has been shown to induce cell differentiation in a number of leukemia and lymphoma cell lines. It also down-regulated c-MYC, suggesting a correlation of down-regulation with induction of cell differentiation or cell death. In the present study, we focused on multiple myeloma,

Antitumor agents XLVIII: Structure-activity relationships of quassinoids as in vitro protein synthesis inhibitors of P-388 lymphocytic leukemia tumor cell metabolism.

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A series of brusatol, bisbrusatol, and bruceantin esters were examined for their ability to inhibit protein synthesis in P-388 lymphocytic leukemia cells. Compounds which produced high T/C % values (170-272) resulted in ID50 of 5.4-15.5 microM for inhibition of whole cell protein synthesis, ID50 of

In vivo characteristics of resistance and cross-resistance of an adriamycin-resistant subline of P388 leukemia.

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A subline of P388 leukemia resistant to adriamycin (P388/ADR) was developed by exposure to the drug in vivo. Resistance to adriamycin proved to be a stable characteristic of P388/ADR. There was no significant inhibition of nucleic acid synthesis in P388/ADR cells in vivo following a dose of 10 mg/kg

Antitumor activity of bruceantin: an old drug with new promise.

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Bruceantin was first isolated from Brucea antidysenterica, a tree used in Ethiopia for the treatment of cancer, and activity was observed against B16 melanoma, colon 38, and L1210 and P388 leukemia in mice. Phase I and II clinical trials were then initiated, but no objective tumor regressions were

Antitumor agents. XXXIV: Mechanism of action of bruceoside A and brusatol on nucleic acid metabolism of P-388 lymphocytic leukemia cells.

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The quassinoids bruceantin, brucein D, brucein E, bruceoside A, and brusatol significantly inhibited P-388 lymphocytic leukemic cell RNA and protein synthesis in tissue culture. However, DNA synthesis inhibition seemed to correlate more directly with the anti-neoplastic activity of these compounds

Antitumor agents XLII: Comparison of antileukemic activity of helenalin, brusatol, and bruceantin and their esters on different strains of P-388 lymphocytic leukemic cells.

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Based on the fact that some known antineoplastic agents possess an ester moiety within their structure, the esters of helenalin, a sesquiterpene lactone, and of brusatol and bruceantin, quassinoids, were synthesized and tested for antileukemic activity in the P-388 screen. These agents gave

NF-kappaB inhibitors from Brucea javanica exhibiting intracellular effects on reactive oxygen species.

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OBJECTIVE Brucea javanica was studied to identify nuclear factor kappaB (NF-κB) inhibitors exhibiting reactive oxygen species (ROS) intracellular amplification. METHODS Eight compounds were evaluated for selective cytotoxicity using HT-29, HeLa, and HL-60 cells, and in a NF-κB assay. Active

Antitumor agents XLV: Bisbrusatolyl and brusatolyl esters and related compounds as novel potent antileukemic agents.

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A series of new bisbrusatolyl and brusatolyl esters and related compounds were synthesized and tested for in vivo antileukemia activity against a quassinoid sensitive strain of P-388 lymphocytic leukemia in BDF1 mice. The bisbrusatolyl malonate, succinate, glutarate, adipate, and sebacate were as

Synthesis of cytotoxic fluorinated quassinoids.

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The C-15 senecioyl side chain of brusatol was interchanged with fluorinated acyl groups, and the C-3 hydroxy group of bruceolide was esterified with fluorinated acyl chlorides. These fluorinated quassinoids 11, 12, 13, and 17 showed significant cytotoxic activity against eight human cancer cell

Antitumor agents LIX: effects of quassinoids on protein synthesis of a number of murine tumors and normal cells.

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The quassinoids (brusatol, bruceantin, bisbrusatolyl esters, and bisbruceantinyl esters of succinic and malonic acids) were observed not to be universal protein synthesis inhibitors. Rather, they were selective for both the types of cancers, e.g., P-388 lymphocytic leukemia, Ehrlich and hepatoma

Antitumor activity of novel ailanthone derivatives in vitro and in vivo.

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The antitumor activities of two ailanthone derivatives with 15 beta-acyloxy side chains were investigated. The cytotoxic activity of 11 beta, 20-epoxy-1 beta, 11 alpha, 12 alpha-trihydroxy-15-beta-[E)-3-methyl-2-octenoyl) oxypicras-3,13(21)-diene-2,16-dione (SUN2071) and 11 beta, 20-epoxy-1 beta, 11

KB cell culture I. Role in discovery of antitumor agents from higher plants.

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KB (Eagle) cell culture has played a powerful role in discovery of antitumor agents from higher plants. Had KB alone been used as a preliminary screen, with in vivo screening limited to KB-active extracts, fractions, or compounds, KB activity of crude products would have led to discovery of

Brusatol-mediated induction of leukemic cell differentiation and G(1) arrest is associated with down-regulation of c-myc.

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Employing the natural product quassinoid brusatol, we currently report cellular and molecular events leading to cell death or terminal differentiation in a panel of leukemic cells. Brusatol and bruceantin exerted significant cytotoxic effects with several leukemic cell lines, but not with K562 or

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