5-(2'-oxoheptadecyl)-resorcinol [structure: see text] and 5-(2'-oxononadecyl)-resorcinol [structure: see text] were isolated from fermentations of an imperfect basidiomycete. The structures of the compounds were determined by spectroscopic techniques. Both compounds exhibit cytotoxic effects against the human colon tumor cell lines COLO-320, DLD-1 and HT-29 and the human promyeloid leukemia cel...

The human carcinoembryonic antigen (CEA) is overexpressed in many types of human cancers and is commonly used as a clinical marker. In colon cancer, this overexpression protects cells against apoptosis and contributes to carcinogenesis. Therefore, CEA-expressing cells as well as CEA expression itself constitute potential therapeutic targets. In this report, we show that the transcription factor...

Background: Heme oxygenase-1 (HO-1) is a cytoprotective and antiapoptotic enzyme, which has been involved in maintaining cellular homeostasis, and plays an important protective role by modulating oxidative injury. Up-regulation of (HO-1) has contributed to tumorogenicity of some cancers. In this study we investigated the expression pattern of the HO-1, in five different human-derived cancer cel...

1. Ibrahim, N.B.M., Briggs, J.C. & Corbishley, C.M. Extrapulmonary oat cell carcinoma. Cancer 1984, 54: 1645-1661. 2. Mills, S.E., Allen, M.S., Jr & Cohen, A.R. Small cell undifferentiated carcinoma of the colon. Am J Surg Pathol 1983, 7: 643-651. 3. Clery, A.P., Dockert, M.B. & Waugh, J.M. Small cell carcinoma ofthe colon and rectum. Arch Surg 1961, 83: 164-172. 4. Gould, V.E. & Chejfec, G. Ne...

Thymidylate synthase (TS; EC 2.1.1.45) is an important cellular enzyme that converts dUMP to dTMP, which is essential for DNA biosynthesis. In addition, TS is an important cellular target for the fluoropyrimidine cytotoxic drugs that are widely used in the treatment of solid tumors. We have generated five monoclonal antibodies against human TS using a recombinant human TS enzyme. These antibodi...

Cyclodextrins are natural macrocyclic oligosaccharides able to form inclusion complexes with a wide variety of guests, affecting their physicochemical and pharmaceutical properties. In order to obtain an improvement of the bioavailability and solubility of 5-fluorouracil, a pyrimidine analogue used as chemotherapeutic agent in the treatment of the colon, liver, and stomac cancers, the drug was ...

We have obtained a novel c-kit complementary DNA (cDNA) from a colon carcinoma cell line, Colo201, and characterized its structure. The size of the transcript in Colo201 was approximately 3.5 kilobases and it hybridized to the c-kit cDNA fragments encompassing the kinase domain, but not to the cDNA fragments encoding extracellular and transmembrane domains. The predicted protein encoded by thos...

The objective of the study was to evaluate the cytotoxic effects of aqueous extract of Cucumis melo fruit on human prostate cancer cell line (PC-3) using MTT and neutral red assays. The crude aqueous extract of C. melo was prepared by cold maceration method, filtered, concentrated and tested on PC-3 cell line. Dose-dependent cytotoxic activities were exhibited on human prostate carcinoma PC...

The objective of the study was to evaluate thecytotoxic effects of aqueous fruit extract of Cucumis melo in human prostate cancer cell line (PC-3) using MTTand neutral red assays. The crude aqueous extract of C.melo was prepared by cold maceration method, filtered,concentrated and tested on PC-3 cell line. Dose-dependent cytotoxic activitieswere exhibited by human prostate carcinoma PC-3 cell l...