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In molecular genetics, a DNA adduct is a segment of DNA bound to a cancer-causing chemical. This process could lead to the development of cancerous cells, or carcinogenesis. DNA adducts in scientific experiments are used as biomarkers of exposure. They are especially useful in quantifying an organism's exposure to a carcinogen. [1]
The central role of DNA damage and epigenetic defects in DNA repair genes in carcinogenesis. DNA damage is considered to be the primary cause of cancer. [17] More than 60,000 new naturally-occurring instances of DNA damage arise, on average, per human cell, per day, due to endogenous cellular processes (see article DNA damage (naturally occurring)).
DNA double-strand breaks (DSBs) are generally accepted to be the most biologically significant lesion by which ionizing radiation causes cancer. [6] In vitro experiments show that ionizing radiation cause DSBs at a rate of 35 DSBs per cell per Gray, [26] and removes a portion of the epigenetic markers of the DNA, [27] which regulate the gene ...
The altered DNA base can cause errors during DNA replication that have mutagenic and carcinogenic potential. Thus H. pylori -induced ROS appear to be the major carcinogens in stomach cancer because they cause oxidative DNA damage leading to carcinogenic mutations.
Genotoxicity is the property of chemical agents that damage the genetic information within a cell causing mutations, which may lead to cancer.While genotoxicity is often confused with mutagenicity, all mutagens are genotoxic, but some genotoxic substances are not mutagenic.
Nutritional Megaloblastic anemia is an anemia (of macrocytic classification) that results from inhibition of DNA synthesis in red blood cell production. [10] Drug-induced folate deficiency anemia: D52.1: Protein-deficiency anemia: Protein deficiency anemia is an anemia that results from an inadequate intake of dietary protein. [14] Scurvy: E54 ...
Some of the substances require conversion into active substances in vivo (e.g., cyclophosphamide).. Cyclophosphamide is one of the most potent immunosuppressive substances. In small dosages, it is very efficient in the therapy of systemic lupus erythematosus, autoimmune hemolytic anemia, granulomatosis with polyangiitis, and other autoimmune diseases.
The basic cause of sporadic (non-familial) cancers is DNA damage and genomic instability. [1] [2] A minority of cancers are due to inherited genetic mutations. [3] Most cancers are related to environmental, lifestyle, or behavioral exposures. [4] Cancer is generally not contagious in humans, though it can be caused by oncoviruses and cancer ...