background: the aim of this study was to evaluate the effects of conjugated lino-leic acid (cla) on apoptosis of tachyzoites of t . gondii , rh strain (type i) and the cyst-forming tehran strain (type ii) in vitro. methods: toxoplasma strains were injected into the peritoneal cavity of balb/c mice. the tehran strain forms cysts in the brain of mice. bradyzoites within the cysts are reactivated ...

The presence of a soluble specific antigen serologically identical with an antigen found in HeLa cells has been shown in 31 per cent of human malignancies. Similar material has not been isolable from nonmalignant adult or fetal human tissues. Ac cording to the accumulated statistical data, there seems to be no correlation between the degree of malignancy of the diseased tissue and the presence ...

A facile alcoholysis of 7-methoxymitosanes and 5-methoxyindolequinone under basic conditions was discovered and a series of 7-alkoxymitosanes were synthesized from mitomycins A and B using this reaction. They showed strong antibacterial activity against various Gram-positive and Gram-negative bacteria and were potent inhibitors of cultivating HeLa S-3 cells in vitro. Among them, 7-n-propoxy-7-d...

Anti-tumor activity of the proteins from Gecko (GP) on cervical cancer cells, and its signaling mechanisms were assessed by viable cell counting, propidium iodide (PI) staining, and Western blot analysis. GP induced the cell death of HeLa cells in a dose-dependent manner while it did not affect the viability of normal cells. Western blot analysis showed that GP decreased the activation of Akt, ...

Rhinovirus-sensitive HeLa cells (HeLa "R") and human embryo lung fibroblasts (HEL) were compared for the isolation of rhinoviruses from patients with respiratory disease. In the period May 1970 to December 1974, 526 rhinoviruses were isolated from 517 patients, 32% in both cell types, 59% in HeLa "R" only, and 9% in HEL only. The annual isolations in HeLa "R" were between 1.7 and 4 times greate...

celecoxib is a non-steroidal anti-inflammatory drug (nsaid) developed as a selective inhibitor of cyclooxygenase-2 (cox-2) for the treatment of rheumatoid arthritis disease. recently some other mechanisms have been identified for anti cancer activity of these agents including induction of apoptosis, inhibition of tumor vascularization, stimulation of antitumor immune responses and inhibition of...

Tissue-type plasminogen activator (t-PA) gene expression in human endothelial cells and HeLa cells is stimulated by the protein kinase C activator phorbol 12-myristate 13-acetate (PMA) at the level of transcription. To study the mechanism of transcriptional regulation, we have characterized a segment of the t-PA gene extending from -135 to +100 by in vivo footprinting analysis [dimethyl sulphat...

OBJECTIVE To investigate the effect of recombinant human p53 adenovirus injection combined with paclitaxel on human cervical cancer HeLa cell proliferation, apoptosis and expression of vascular endothelial growth factor (VEGF). MATERIALS AND METHODS Detection of effects of paclitaxel, rAd-p53, and drug combination on the proliferation of HeLa cells by MTT method. Detection of effects of pacli...

PX-12, as an inhibitor of thioredoxin (Trx), has antitumor activity. However, little is known about the toxicological effect of PX-12 on cervical cancer cells. In the present study, the growth inhibitory effects of PX-12 on HeLa cervical cancer cells in association with reactive oxygen species (ROS) and glutathione (GSH) levels were investigated. Based on MTT assays, PX-12 inhibited the growth ...

Our laboratory previously used the SEREX method in U937 cells and identified a novel leukemia-associated gene MLAA-34, a novel splice variant of CAB39L associated with acute monocytic leukemia, that exhibited anti-apoptotic activities in U937 cells. Whether MLAA-34 has an anti-apoptotic role in other tumor cells has not yet been reported. We explored whether MLAA-34 exhibited anti-apoptotic eff...