Some of the antibiotics have excited our interest in the field of cancer chemotherapy because of their anti-tumor actions. In this connection it is of particular significance to understand the mechanism of cell-damage under the influence of these agents, since both growth and regression of the tumor are under the control of the mitotic mechanism. Mitomycin-C is one of the antibiotics isolated f...

Several antitumor drugs are shown to be mutagenic in murine thymoma lines: mitomycin C, bleomycin, streptonigrin, Colcemid, and BD40, an analog of ellipticine. Using conditions yielding 3 to 40% cell survival, all five drugs tested increase the frequency of glucocorticoid-resistant variants. Mitomycin C is as efficient as the classical alkylating agents N-methyl-N'-nitro-N-nitrosoguanidine and ...

PURPOSE: We studied the effects of exposure to mitomycin C and 5-Fluorcuracil to human RPE cultures, in growth inhibition and citoxicity. METHODS: 1) Growth inhibition: RPE cultures (3.000 cells/well) were exposed to different concentrations of mitomycin C and 5-Fluorouracil, and cell viability (MTT test) was evaluated 48h, 72h and 96h after. 2) Citotoxicity: RPE cultures (10.000 cells/well) we...

When cells of Escherichia coli B growing in a glucose-synthetic medium were treated with mitomycin C, the effects produced by the antibiotic varied, depending on the concentration. When the concentration was reduced to less than 0.1 mug/ml, the action of the antibiotic was bacteriostatic; cell elongation resulted, but no effect on the synthesis of cellular macromolecules was apparent. At higher...

Mitomycin C or porfiromycin (methyl mitomycin) in combination with either 6thioguanine or 5-fluorouracil produced synergistic inhibition of the growth of both Sar coma 180 and Lymphoma L1210 ascites cell neoplasms. i\Iitomycin C and porfiromy cm possessed the same therapeutic index in the L1210 lymphoma system, but mitomycin C was about 5 times more potent. Doses of mitomycin C that induced pro...

Cisplatin is a crucial agent in the treatment of many solid tumors, yet many tumors have either acquired or intrinsic resistance to the drug. We have used the homozygous diploid deletion pool of Saccharomyces cerevisiae, containing 4728 strains with individual deletion of all nonessential genes, to systematically identify genes that when deleted confer sensitivity to the anticancer agents cispl...

The use of intravesical therapy for the treatment of superficial bladder cancer aims to reduce morbidity and mortality by eradicating existing disease, preventing tumor recurrence and attempting to halt tumor progression. Mitomycin-C is a commonly used intravesical treatment option for superficial bladder cancer and was used for the first time by Shida and colleagues in 1967 [1]. It is an antit...

It is well established that DNA lesions trigger cell cycle check-points causing a mitotic delay that is required for their repair before cells enter the mitotic phase. Caffeine, in some cases, can remove this delay and consequently potentiates the yield of induced chromosome aberrations. The objective of this study was to test the effect of a G2 treatment with S-dependent agents (UV light and m...

Mitomycin C was reviewed in this journal 25 years ago and an update of its clinical usefulness is appropriate.The current review is based on representative publications covering clinical trials performed throughout the world. Single agent activity in each of the major neoplastic diseases has been reassessed when possible and the most important combinations evaluated. It is concluded that mitomy...

BACKGROUND The purpose of this paper is to report the successful treatment of corneal scarring and high corneal astigmatism secondary to previous pterygium surgery with diamond burr superficial keratectomy using mitomycin C. METHODS Four patients with corneal scarring and high corneal astigmatism related to previous pterygium surgery underwent diamond burr superficial keratectomy with applica...