Weight loss effects of quaternary salts of 5-amino-1-(chloromethyl)-1,2-dihydro-3H-benz[e]indoles; structure–activity relationships
摘要:
Quaternary salt analogues based on the DNA minor groove binder and adenine N3 alkylating agent 5-amino-1-(chloromethyl)-1,2-dihydro-3H-benz[e]indole (aminoCBI) show remarkable effects on the body weight of mice (a long-term failure to gain weight relative to matched controls with no loss of appetite or perceptible deterioration in health) following administration of a single (non-toxic) dose between about 0.5-5 mu mol/kg. The nature of the quaternizing group was not important, but a related hydroxyCBI analogue was much less effective. Compounds where the chloro group was replaced by a hydrogen or hydroxy group (thus abrogating DNA alkylating capability) showed no weight control activity. It is speculated, based on other studies, that the marked long-term weight control effect is due to inhibition of bile flow into the intestine and reduced absorption of triglycerides, together with accelerated cell death in spleen and white adipose tissues due to drug accumulation there. This class of compound may serve as interesting tools for further study of these phenomena. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis and Evaluation of Nitroheterocyclic Carbamate Prodrugs for Use with Nitroreductase-Mediated Gene-Directed Enzyme Prodrug Therapy
作者:Michael P. Hay、Robert F. Anderson、Dianne M. Ferry、William R. Wilson、William A. Denny
DOI:10.1021/jm030308b
日期:2003.12.1
carbamate prodrugs of phenylenediamine mustard and 5-amino-1-(chloromethyl)-3-[(5,6,7-trimethoxyindol-2-yl)carbonyl]-1,2-dihydro-3H- benz[e]indoline (amino-seco-CBI-TMI), covering a wide range of reduction potential, were prepared and evaluated for use in gene-directedenzymeprodrugtherapy (GDEPT) using a two-electron nitroreductase (NTR) from Escherichia coli B. The carbamate prodrugs and corresponding
Radiation-activated cytotoxin therapy of neoplastic disease
申请人:Auckland Uniservices Limited
公开号:US06071908A1
公开(公告)日:2000-06-06
A method of treating neoplastic disease wherein a patient in need of such treatment is administered an effective amount of a radiation-activated cytotoxin prodrug (RACP) which has low toxicity, which is reducible by reducing agents generated by the radiolysis of water and which, upon reduction, releases a sufficient amount of a cytotoxic effector of sufficient cytotoxic potency to kill tumor cells. The tumor cells are irradiated with ionizing radiation to reduce the prodrug which is present at the locus of the tumor cells to release the cytotoxic effector.
A method of treating neoplastic disease which comprises the steps of:
(a) administering to a patient in need of such treatment an effective amount of a radiation-activated cytotoxin prodrug (RACP) which has low toxicity, which can be reduced by reducing agents generated by the radiolysis of water (the equated electron and/or the hydrogen radical) and which, upon reduction, releases a sufficient amount of an effector of sufficient cytotoxic potency to kill tumour cells; and
(b) irradiating said tumour cells to reduce the prodrug which is present at the locus of said tumour cells to release said cytotoxic effector.
In preferred embodiments, the RACP is of formula (I), (VI), (VII) or (VIII).
Synthesis and Evaluation of Nitroheterocyclic Phosphoramidates as Hypoxia-Selective Alkylating Agents
作者:Richard F. Borch、Jiwen Liu、James P. Schmidt、Joseph T. Marakovits、Carolyn Joswig、Jerry J. Gipp、R. Timothy Mulcahy
DOI:10.1021/jm0001020
日期:2000.6.1
A series of novel nitroheterocyclic phosphoramidates has been prepared, and the cytotoxicity of these compounds has been evaluated in clonogenic assays against B16, wild-type and cyclophosphamide-resistant MCF-7, and HT-29 cells under aerobic conditions and HT-29 cells under hypoxic conditions. All compounds were comparable in toxicity to wild-type and resistant MCF-7 cells and were also selectively toxic to HT-29 cells under hypoxic conditions (selectivity ratios 1.7 to >20). Analogues lacking the nitro group were not cytotoxic. Electron-withdrawing substituents increased cytotoxicity under aerobic conditions and thereby decreased hypoxic selectivity. In contrast, an electron-donating substituent markedly decreased both aerobic and hypoxic cytotoxicity but enhanced hypoxic selectivity. Chemical reduction of the nitro group resulted in rapid expulsion of the cytotoxic phosphoramide mustard. The most potent of these compounds show significant cytotoxicity under both aerobic and hypoxic conditions.