Cross-reactivities among tumor-associated antigens of rat mammary fibroadenomas and among these fribroadenomas and a rat mammary carcinoma were investigated by in vitro techniques. Lymphocytes from five female W/Fu rats bearing mam mary fibroadenomas were found to share a common reactivity against fibroadenoma target cells, as demon strated by lymphocyte cytotoxicity tests on iododeoxyuridine-1...

BACKGROUND The objective of the present study is to assess viability tests and to evaluate follicle ovarian tissue quality after freezing-thawing procedures. METHODS Ewe's ovaries were harvested at the slaughterhouse, after dissection each ovarian specimen was divided into two groups: fresh tissue (control group) and frozen tissue.In the first part of the study, the follicles viability was as...

This study aims to investigate the cytotoxicity of Andrographis paniculata, Ziziphus spina-christi and Gymnanthemum extensum crude extracts their combination with low piperine fractional Piper nigrum extract. All plants were extracted water five organic solvents (methanol, ethanol, dichloromethane, ethyl acetate hexane). Cytotoxicity was assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tet...

Cytotoxicity testing of dental restorative materials must be viewed as an assessment of hazards, that is the potential of the material to cause pulpal problems. In this context, composites, glass ionomers, amalgams, zinc-based cements and peroxide bleaching agents are all possible hazards to the pulp. The risks that these materials will cause pulpal toxicity in vivo can be partly estimated by a...

The increasing penetration of materials and products containing engineered nanoparticles (ENPs) to the market is posing many concerns regarding their environmental impacts. To assess these impacts, there is an urgent need of techniques for determining the health-related properties of ENPs and standards for assessing their toxicity. Although a wide number of systems for characterizing nanopartic...