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Human cell-mediated cytotoxicity, mutagenicity, and DNA adduct formation of 7H-dibenzo(c,g)carbazole and its N-methyl derivative in diploid human fibroblasts.

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The aromatic N-heterocyclic 7H-dibenzo(c,g)carbazole (DBC), like polynuclear aromatic hydrocarbons, is a potent inducer of local sarcomas, papillomas, and respiratory tumors, but unlike such compounds it also induces hepatomas. The N-methyl derivative of DBC, N-methyl-dibenzo(c,g)carbazole (MeDBC),

Tissue-specific activities of methylated dibenzo[c,g]carbazoles in mice: carcinogenicity, DNA adduct formation, and CYP1A induction in liver and skin.

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The potent multitissue carcinogen 7H-dibenzo[c,g]carbazole and nine methylated derivatives, synthesized on the basis of the positions in the parent compound that are involved in metabolism, were tested for their ability to induce sarcomas and hepatic tumors in XVIInc/Z mice. In addition, the

Organ-specific, carcinogenic dibenzo[c,g]carbazole derivatives: discriminative response in S. typhimurium TA100 mutagenesis modulated by subcellular fractions of mouse liver.

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7H-Dibenzo[c,g]carbazole (DBC) has carcinogenic effects on mouse subcutaneous fibroblasts and liver; the N-methyl derivative (N-MeDBC) induces only sarcomas; 3-methyl- and 5,9-dimethyldibenzo[c,g]carbazole (3-MeDBC and 5,9-DMeDBC) are specific, potent hepatocarcinogens in mice. The mutagenicity in

Mediterranean and immunodeficiency associated Kaposi's sarcoma - Does micromorphology reflect clinical patterns?

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Kaposi's sarcoma (KS) follows a different clinical course in Mediterranean and immunodeficiency related cases and has a poorer prognosis in the latter. We investigated 40 patients with Mediterranean and eight with immunodeficiency related KS by histomorphology and immunohistology in comparision to

Biological properties of 5,11-dimethyl-6H-pyrido[3,2-b]carbazoles: a new class of potent antitumour drugs.

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Thirteen 5,11-dimethyl-6H-pyrido[3,2-b]carbazoles, structurally related to the antitumour drug ellipticine, were tested for their cytotoxicity against the L1210 murine leukaemia cell line and their antitumour activity against both leukaemias and solid tumours. Most of them showed an interesting

Synthesis and evaluation of novel pyrimido-acridone, -phenoxadine, and -carbazole as topoisomerase II inhibitors.

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As part of a series of studies to discover new topoisomerase II inhibitors, novel pyrimidoacridones, pyrimidophenoxadines, and pyrimidocarbazoles were synthesized, and in vitro and in vivo antitumor activities and DNA-protein and/or DNA-topoisomerase II cross-linking activity as an indicator of

Determination of binding modes and binding constants for the complexes of 6H-pyrido[4,3-b]carbazole derivatives with DNA.

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The binding modes and binding constants for the complexes of forty types of pyridocarbazole derivatives 1-40 with double stranded DNAs (dsDNAs) were reported. The binding modes were determined by a combination of a deflection spectroscopy and orientation of the corresponding molecule in the

Antineoplastic activity of azacarbazoles. III. Synthesis and antitumor evaluation of selected 2-, 3- aza- and diazaanalogues of carbazole.

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Preliminary screening of the antitumor properties of selected azacarbazoles revealed that of all the compounds tested only 2,7-diazacarbazole (compound IX) and 3,6-diazacarbazole (compound XI) caused the inhibition of Sarcoma 180 growth up to 70%. beta- and gamma-Carbolines and their derivatives in

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