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Tg-rasH2 Mouse
A Tg-rasH2 mouse is an innovative transgenic mouse, developed in Central Institute for Experimental Animals (CIEA), carrying the three copies of human prototype c-Ha-ras oncogenes with endogenous promoter and enhancer in tandem. Under Alternative Carcinogenicity Testing (ACT) project conducted by International Life Sciences Institute (ILSI) and ILSI Health and Environmental Sciences Institute (HESI), comprehensive evaluation studies on the Tg-rasH2 mouse bioassay system were performed and the usefulness of the system was validated for carcinogenicity A carcinogen is any substance, radionuclide, or radiation that promotes carcinogenesis (the formation of cancer). This may be due to the ability to damage the genome or to the disruption of cellular metabolic processes. Several radioactive substan ... studies by 23 international pharmaceutical companies. In the studies, it was confirmed that Tg-rasH2 mice are sensitive to both genotoxic and non-genotoxic human carcinogens and show no re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Institute For Experimental Animals
Central Institute for Experimental Animals (CIEA) (実験動物中央研究所) is a research center for experimental animals in Japan. It was founded by Tatsuji Nomura in 1952 with the mission of improving the level of biomedical research. Main achievements and ongoing projects *Establishment of the world first and only monitoring center for experimental animals in 1970. Appointed as an International Council for Laboratory Animal Science (ICLAS) Monitoring Center in 1979. *Development and establishment of Tg-PVR mouse, in which a human poliovirus receptor gene is introduced, used as a safety testing for oral polio vaccine. *Establishment of Tg-rasH2 mouse, in which a human prototype c-Ha-ras oncogene is introduced, and evaluation of their practical usefulness. Achieved a high level of accuracy in carcinogenicity testing for drugs and reduced the testing period to six months from the conventional two years' system. *Developing spinal cord injury model and Parkinson's disease ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oncogenes
An oncogene is a gene that has the potential to cause cancer. In tumor cells, these genes are often mutated, or expressed at high levels.Kimball's Biology Pages. "Oncogenes" Free full text Most normal cells will undergo a programmed form of rapid cell death ( apoptosis) when critical functions are altered and malfunctioning. Activated oncogenes can cause those cells designated for apoptosis to survive and proliferate instead. Most oncogenes began as proto-oncogenes: normal genes involved in cell growth and proliferation or inhibition of apoptosis. If, through mutation, normal genes promoting cellular growth are up-regulated (gain-of-function mutation), they will predispose the cell to cancer; thus, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Life Sciences Institute
The International Life Sciences Institute (ILSI) is a global nonprofit 501(c)(3) organization headquartered in Washington, DC, United States that publishes peer-reviewed studies on nutrition and food safety. It was founded in 1978 by Alex Malaspina, a former Coca-Cola executive (who was affiliated with ILSI until 2001), and it is partially financed by its 300+ members, which includes food and chemical corporations like BASF, McDonald’s, Syngenta and Pepsi. In 2020, the organization's revenue was $10.1 million. Structure Until 2018, ILSI operated as a member organization, whose members were exclusively food and beverage, agricultural, chemical, and pharmaceutical companies. In November 2018, ILSI restructured as a global federation of entities, consisting of non-profit organizations with public and private sector members. Based on its 2020 annual report, 70.8% of its revenue comes from membership dues and committee assessments; 19.2% from grants and contributions; and the rema ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carcinogenicity
A carcinogen is any substance, radionuclide, or radiation that promotes carcinogenesis (the formation of cancer). This may be due to the ability to damage the genome or to the disruption of cellular metabolic processes. Several radioactive substances are considered carcinogens, but their carcinogenic activity is attributed to the radiation, for example gamma rays and alpha particles, which they emit. Common examples of non-radioactive carcinogens are inhaled asbestos, certain dioxins, and tobacco smoke. Although the public generally associates carcinogenicity with synthetic chemicals, it is equally likely to arise from both natural and synthetic substances. Carcinogens are not necessarily immediately toxic; thus, their effect can be insidious. Carcinogens, as mentioned, are agents in the environment capable of contributing to cancer growth. Carcinogens can be categorized into two different types: activation-dependent and activation-independent, and each nature impacts their level ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
