Biomaterial Database

Alterations in monoamine oxidase activity of the mouse brain and liver after mixed neutron-gamma irradiation. 1987

K Bodó, and G Benkö

Monoamine oxidase (MAO) plays an important role in the metabolism of neuro-transmitter biogenic amines. Its activity was determined in mouse brain and liver after exposure to different kinds of ionizing radiation and after pretreatment with a radioprotective agent. After a lethal dose of mixed neutron-gamma irradiation the MAO activity decreased in the brain and increased in the liver. In contrast, after a lethal dose of 60Co-gamma irradiation enzyme activity was considerably increased in the brain while in the liver it increased like after mixed neutron-gamma irradiation. AET (S2-aminoethyl-isothiuronium-Br X HBr), when administered in a radio-protective dose, inhibited MAO activity in the brain, while it increased in the liver. Even more marked changes of enzyme activity were observed in both brain and liver after AET pretreatment and mixed neutron-gamma irradiation. On the basis of the results it is suggested that different kinds of ionizing radiation lead to different types of lipid peroxidation in the lipid environment surrounding MAO, an event leading to altered enzyme activity. AET itself inhibited MAO in the brain and increased the activity in the liver but did not prevent the alterations caused by ionizing radiation in enzyme activity.

UI	MeSH Term	Description	Entries
D008099	Liver	A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances.	Livers
D008297	Male		Males
D008995	Monoamine Oxidase	An enzyme that catalyzes the oxidative deamination of naturally occurring monoamines. It is a flavin-containing enzyme that is localized in mitochondrial membranes, whether in nerve terminals, the liver, or other organs. Monoamine oxidase is important in regulating the metabolic degradation of catecholamines and serotonin in neural or target tissues. Hepatic monoamine oxidase has a crucial defensive role in inactivating circulating monoamines or those, such as tyramine, that originate in the gut and are absorbed into the portal circulation. (From Goodman and Gilman's, The Pharmacological Basis of Therapeutics, 8th ed, p415) EC 1.4.3.4.	Amine Oxidase (Flavin-Containing),MAO,MAO-A,MAO-B,Monoamine Oxidase A,Monoamine Oxidase B,Type A Monoamine Oxidase,Type B Monoamine Oxidase,Tyramine Oxidase,MAO A,MAO B,Oxidase, Monoamine,Oxidase, Tyramine
D009502	Neutrons	Electrically neutral elementary particles found in all atomic nuclei except light hydrogen; the mass is equal to that of the proton and electron combined and they are unstable when isolated from the nucleus, undergoing beta decay. Slow, thermal, epithermal, and fast neutrons refer to the energy levels with which the neutrons are ejected from heavier nuclei during their decay.	Neutron
D001921	Brain	The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.	Encephalon
D005720	Gamma Rays	Penetrating, high-energy electromagnetic radiation emitted from atomic nuclei during NUCLEAR DECAY. The range of wavelengths of emitted radiation is between 0.1 - 100 pm which overlaps the shorter, more energetic hard X-RAYS wavelengths. The distinction between gamma rays and X-rays is based on their radiation source.	Gamma Wave,Gamma Radiation,Nuclear X-Rays,Radiation, Gamma,X-Rays, Nuclear,Gamma Radiations,Gamma Ray,Gamma Waves,Nuclear X Rays,Nuclear X-Ray,Ray, Gamma,Wave, Gamma,Waves, Gamma,X Rays, Nuclear,X-Ray, Nuclear
D000338	beta-Aminoethyl Isothiourea	A radiation-protective agent that can inhibit DNA damage by binding to the DNA. It also increases the susceptibility of blood cells to complement-mediated lysis.	2-Aminoethylisothiuronium Bromide,beta-Aminoethylisothiuronium Diacetate,beta-Aminoethylisothiuronium Dihydrobromide,2-Aminoethylisothiuronium Diacetate,2-Aminoethylisothiuronium Dihydrochloride,2-Aminoethylisothiuronium Dihydroiodide,2-Aminoethylisothiuronium Diperchlorate,2-Aminoethylisothiuronium Monohydrobromide,2-Aminoethylisothiuronium Phosphate (1:1),2-Aminoethylisothiuronium Sulfate (1:1),AET,Aminoethylisothiuronium Bromide Hydrobromide,Carbamimidothioic acid, 2-aminoethyl ester, dihydrobromide,Isothiourea, (2-Aminoethyl),Ixecur,S-(2-Aminoethyl)isothiourea,beta-Aminoethylisothiuronium Bromide,beta-Aminoethylisothiuronium Dihydrochloride,beta-Aminoethylisothiuronium Dihydroiodide,beta-Aminoethylisothiuronium Diperchlorate,beta-Aminoethylisothiuronium Monohydrobromide,beta-Aminoethylisothiuronium Phosphate (1:1),beta-Aminoethylisothiuronium Sulfate (1:1),2 Aminoethylisothiuronium Bromide,2 Aminoethylisothiuronium Diacetate,2 Aminoethylisothiuronium Dihydrochloride,2 Aminoethylisothiuronium Dihydroiodide,2 Aminoethylisothiuronium Diperchlorate,2 Aminoethylisothiuronium Monohydrobromide,Bromide, 2-Aminoethylisothiuronium,Bromide, beta-Aminoethylisothiuronium,Diacetate, 2-Aminoethylisothiuronium,Diacetate, beta-Aminoethylisothiuronium,Dihydrobromide, beta-Aminoethylisothiuronium,Dihydrochloride, 2-Aminoethylisothiuronium,Dihydrochloride, beta-Aminoethylisothiuronium,Dihydroiodide, 2-Aminoethylisothiuronium,Dihydroiodide, beta-Aminoethylisothiuronium,Diperchlorate, 2-Aminoethylisothiuronium,Diperchlorate, beta-Aminoethylisothiuronium,Hydrobromide, Aminoethylisothiuronium Bromide,Isothiourea, beta-Aminoethyl,Monohydrobromide, 2-Aminoethylisothiuronium,Monohydrobromide, beta-Aminoethylisothiuronium,beta Aminoethyl Isothiourea,beta Aminoethylisothiuronium Bromide,beta Aminoethylisothiuronium Diacetate,beta Aminoethylisothiuronium Dihydrobromide,beta Aminoethylisothiuronium Dihydrochloride,beta Aminoethylisothiuronium Dihydroiodide,beta Aminoethylisothiuronium Diperchlorate,beta Aminoethylisothiuronium Monohydrobromide
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus