3 Ergebnisse.

Oncogenes are mutated and/or overexpressed at high levels in tumor cells. Tumors of the lung, breast, pancreas, and colon may display specific oncogenetic features. These tumors have been largely associated with exposure to environmental carcinogens and a variety of biological agents, including viruses. These carcinogens can induce specific genetic and epigenetic alterations in these tissues, leading to aberrant functioning of oncogenes and tu...

Reduced glutathione (GSH) is the most important thiol in living organisms. It is the key component of antioxidant system and serves as a free radical scavenger. There is a cycle of GSH in biological systems and this cycle provides higher intracellular levels of GSH. GSH depletion and apparent oxidative stress may cause toxicity and can affect the general well-being of the organism. GSH was shown to be preventive against aging, cancer, heart di...

This book is prepared to give information on the chemistry and toxicity of nitrites. Several factors can affect a person's health like exposure to certain environmental chemicals, particularly to NO3- and NO2-. Several factors including drugs and certain chemical exposures can all be listed as risk factors in high exposure to NO3-/NO2-. Besides, in rural areas, drinking well water is the primary source of NO2- exposure.It is extremely difficul...