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homospermidine/leucemia
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8 resultados
Synergistic antitumor effects of anthracenylmethyl homospermidine and alpha-difluoromethylornithine on promyelocytic leukemia HL60 cells.
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The present study was designed to assess the synergistic antitumor effects of anthracenylmethyl homospermidine (ANTMHspd), a novel polyamine conjugate, with alpha-difluoromethylornithine (DFMO) and to elucidate the mechanism of these effects on human leukemia HL60 cells. Cell proliferation was
Synthesis and bioevaluation of N-(arylalkyl)-homospermidine conjugates.
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N1-(Arylalkyl)homospermidines (1c-1f) and terminally piperazine-substituted homospermidine conjugates (2a-2e) were synthesized and evaluated for cytotoxicity in mouse leukemia L1210, alpha-difluoromethylornithine (DFMO)-treated L1210, melanoma B16, spermidine (SPD)-treated B16, and HeLa cell lines.
In vitro antiproliferative activity of 4-substituted 2-(2-hydroxyphenyl)thiazolines on murine leukemia cells.
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Two previously synthesized and two structurally novel thiazoline iron chelators are described. N4-Benzyl-N1,N8-bis[[2-(2-hydroxyphenyl)thiazolin-4-yl]carbonyl] homospermidine (5) proved to be the most potent antiproliferative and cytocidal compound in the series with in vitro IC50 values of 3 and 1
Ant 4,4, a polyamine-anthracene conjugate, induces cell death and recovery in human promyelogenous leukemia cells (HL-60).
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One of the major problems in cancer therapy is the lack of specificity of chemotherapeutic agents towards cancer cells, resulting in adverse side effects. One means to counter this is to selectively deliver the drug to the cancer cell. Cancer cells accumulate increased concentrations of polyamines
Synthesis and biological evaluation of N1-(anthracen-9-ylmethyl)triamines as molecular recognition elements for the polyamine transporter.
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An efficient modular synthesis of N(1)-substituted triamines containing different tether lengths between nitrogen centers was developed. A series of N(1)-(9-anthracenylmethyl)triamines were evaluated for biological activity in L1210 (murine leukemia), alpha-difluoromethylornithine (DFMO)-treated
Designing the polyamine pharmacophore: influence of N-substituents on the transport behavior of polyamine conjugates.
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N-Ethylated N-arylmethyl polyamine conjugates were synthesized and evaluated for their ability to target the polyamine transporter (PAT). To understand the effect of N-ethylation upon PAT selectivity, ethyl groups were appended onto a PAT-selective N (1)-anthracenenylmethyl homospermidine
Synthesis and evaluation of unsymmetrical polyamine derivatives as antitumor agents.
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A series of unsymmetrically substituted polyamine derivatives were prepared and their cytotoxicities in mouse leukemia L1210, melanoma B16, and HeLa cells were investigated. The in vitro cytotoxicity revealed that these conjugates could recognize the polyamine transporter, and the N-ethyl modified
Defining the molecular requirements for the selective delivery of polyamine conjugates into cells containing active polyamine transporters.
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Several N(1)-substituted polyamines containing various spacer units between nitrogen centers were synthesized as their respective HCl salts. The N(1)-substituents included benzyl, naphthalen-1-ylmethyl, anthracen-9-ylmethyl, and pyren-1-ylmethyl. The polyamine spacer units ranged from generic
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