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The term "xenobiotics", however, is very often used in the context of pollutants such as dioxins and polychlorinated biphenyls and their effect on the biota, because xenobiotics are understood as substances foreign to an entire biological system, i.e. artificial substances, which did not exist in nature before their synthesis by humans.
Immunotoxicology (sometimes abbreviated as ITOX) is the study of the toxicity of foreign substances called xenobiotics and their effects on the immune system. [1] Some toxic agents that are known to alter the immune system include: industrial chemicals, heavy metals, agrochemicals, pharmaceuticals, drugs, ultraviolet radiation, air pollutants and some biological materials.
Cytochrome P450 oxidases are important enzymes in xenobiotic metabolism.. Xenobiotic metabolism (from the Greek xenos "stranger" and biotic "related to living beings") is the set of metabolic pathways that modify the chemical structure of xenobiotics, which are compounds foreign to an organism's normal biochemistry, such as drugs and poisons.
Many effects may not necessarily be readily detectable and lead to ecological change that would be erroneously attributed to natural change. [2] This said there are several effects that have been identified in the literature. One long term, possibly irreversible effect is microbiological resistance to antibiotics (antibiotic resistance).
Drug metabolism is the metabolic breakdown of drugs by living organisms, usually through specialized enzymatic systems. More generally, xenobiotic metabolism (from the Greek xenos "stranger" and biotic "related to living beings") is the set of metabolic pathways that modify the chemical structure of xenobiotics, which are compounds foreign to an organism's normal biochemistry, such as any drug ...
Cytochrome P450 1A2 (abbreviated CYP1A2), a member of the cytochrome P450 mixed-function oxidase system, is involved in the metabolism of xenobiotics in the human body. [5] In humans, the CYP1A2 enzyme is encoded by the CYP1A2 gene .
Pesticides which affect the endocrine system of a target species can have led to unintended effects on other species. [28] For example, PCBs can interrupt animal fetal development, cause changes in an animal's response to stress, and cause thyroid and immune function diseases. [ 27 ]
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