Two novel diterpenoids, cespitulones A (1) and B (2), were isolated from extracts of the soft coral Cespitularia taeniata. Both compounds possess an unprecedented bicyclo [10.3.1] ring system with C-C bond connections between C-10 and C-20, and between C-20 and C-11. Their structures were elucidated on the basis of extensive spectroscopic analyses. Compound 1 exhibited significant cytotoxicity ...

PURPOSE Previous gene transfection studies have shown that the accumulation of human ribonucleotide reductase small subunit M2 (hRRM2) enhances cellular transformation, tumorigenesis, and malignancy potential. The latest identified small subunit p53R2 has 80% homology to hRRM2. Here, we investigate the role of p53R2 in cancer invasion and metastasis. EXPERIMENTAL DESIGN The immunohistochemist...

Peroxisome proliferator-activated receptor gamma (PPARgamma), a fatty acid-activated nuclear receptor, is implicated in adipocyte differentiation and insulin sensitisation. In view of the association of dietary fat intake and bowel disease, the expression of PPARgamma in rodent and human intestine was studied. Expression of PPARgamma mRNA was examined by Northern blot hybridisation, RNase prote...

This study was conducted to confirm the hypothesis that intestinal microflora are required for the development of adenocarcinoma in the colon of the TCRb and p53 double-knockout (TCRb p53) mouse. Germ-free TCRb p53 mice were produced. At 7 weeks of age, the animals were divided into two groups (n 5 10/group), and one of these groups was conventionalized. Animals of both groups were subjected to...

Inoperable adenocarcinoma in colon or lung shows resistance to conventional anti-cancer therapy. For these cancers, the feasibility of transcriptionally targeted killing of carcinoembryonic antigen (CEA)-producing adenocarcinoma cells was investigated. Adenovirus vectors carrying a CEA promoter to express E. coli lacZ (AdCEALacZ) or herpes simplex thymidine kinase (AdCEATK) were made and their ...

Background and objective: Gastric cancer is the fourth common and the second deadliest cancer worldwide, which the major causes of its prevalence are genetic factors and the lifestyle, such as eating fast foods, physical inactivity, environmental pollution, and other natural factors. Method: This research was performed in human and animal cell bank of Iranian Biological Resource Center, and ...

Using genetic interventions, we previously determined that C-C motif chemokine ligand 2 (CCL2) promotes malignant pleural effusion (MPE) formation in mice. Here we conducted preclinical studies aimed at assessing the specific therapeutic potential of antibody-mediated CCL2 blockade against MPE. For this, murine MPEs or skin tumors were generated in C57BL/6 mice by intrapleural or subcutaneous d...

A few flavanones were synthesised by cyclisation of corresponding 3-(heteroaryl)-1(2-hydroxyphenyl) prop-2-en-1-one with sodium acetate in alcohol-water and evaluated for activity. Synthesised compounds were assayed for their in vitro anticancer activity against three human cancer cell lines, mammary adenocarcinoma (MCF7), human colon adenocarcinoma (HT29) and human kidney adenocarcinoma (A498)...

The acquisition of resistance to anticancer agents used in chemotherapy is the main cause of treatment failure in malignant disorders, provoking tumours to become resistant during treatment, although they initially respond to it. The main multidrug resistance (MDR) mechanism in tumour cells is the expression of P-gly-coprotein (P-gly), that acts as an ATP-dependent active efflux pump of chemoth...