Biomaterial Database

Dietary vitamin E decreases ESR signal intensity in hepatic microsomal preparations from malignant hyperthermia susceptible pigs. 1991

G G Duthie, and D B McPhail, and P C Morrice, and J R Arthur

Rowett Research Institute, Bucksburn, Aberdeen, U.K.

On incubation with the spin trap alpha-(4-pyridyl-l-oxide)-N-tert-butylnitrone (4-POBN), a characteristic electron spin resonance (ESR) signal was produced at a greater rate in hepatic microsomal fractions from malignant hyprthermia susceptible (MHS) pigs compared with resistant (MHR) pigs. This was accompanied by increased formation of thiobarbituric acid reactive substances (TBARS). Supplementation of diets for six weeks with 235 mg alpha-tocopherol acetate/kg significantly increased microsomal vitamin E content of both pigs types. Moreover, the rate of formation of TBARS and ESR signal height of incubated microsomes from supplemented MHS pigs was decreased to that of MHR pigs. Elevated pyruvate kinase activities and TBARS concentrations in plasma of MHS pigs were also moderated by dietary vitamin E. Vitamin E supplementation may decrease the peroxidative events associated with MH.

UI	MeSH Term	Description	Entries
D008305	Malignant Hyperthermia	Rapid and excessive rise of temperature accompanied by muscular rigidity following general anesthesia.	Hyperpyrexia, Malignant,Hyperthermia, Malignant,Malignant Hyperpyrexia,Anesthesia Related Hyperthermia,Hyperthermia of Anesthesia,Anesthesia Hyperthermia,Hyperthermia, Anesthesia Related,Malignant Hyperpyrexias
D008862	Microsomes, Liver	Closed vesicles of fragmented endoplasmic reticulum created when liver cells or tissue are disrupted by homogenization. They may be smooth or rough.	Liver Microsomes,Liver Microsome,Microsome, Liver
D009589	Nitrogen Oxides	Inorganic oxides that contain nitrogen.	Nitrogen Oxide,Oxide, Nitrogen,Oxides, Nitrogen
D011725	Pyridines	Compounds with a six membered aromatic ring containing NITROGEN. The saturated version is PIPERIDINES.
D004578	Electron Spin Resonance Spectroscopy	A technique applicable to the wide variety of substances which exhibit paramagnetism because of the magnetic moments of unpaired electrons. The spectra are useful for detection and identification, for determination of electron structure, for study of interactions between molecules, and for measurement of nuclear spins and moments. (From McGraw-Hill Encyclopedia of Science and Technology, 7th edition) Electron nuclear double resonance (ENDOR) spectroscopy is a variant of the technique which can give enhanced resolution. Electron spin resonance analysis can now be used in vivo, including imaging applications such as MAGNETIC RESONANCE IMAGING.	ENDOR,Electron Nuclear Double Resonance,Electron Paramagnetic Resonance,Paramagnetic Resonance,Electron Spin Resonance,Paramagnetic Resonance, Electron,Resonance, Electron Paramagnetic,Resonance, Electron Spin,Resonance, Paramagnetic
D005609	Free Radicals	Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. Free radicals include reactive oxygen and nitrogen species (RONS). They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated.	Free Radical
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
D013113	Spin Labels	Molecules which contain an atom or a group of atoms exhibiting an unpaired electron spin that can be detected by electron spin resonance spectroscopy and can be bonded to another molecule. (McGraw-Hill Dictionary of Chemical and Technical Terms, 4th ed)	Spin Label,Label, Spin,Labels, Spin
D013552	Swine	Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).	Phacochoerus,Pigs,Suidae,Warthogs,Wart Hogs,Hog, Wart,Hogs, Wart,Wart Hog
D014810	Vitamin E	A generic descriptor for all TOCOPHEROLS and TOCOTRIENOLS that exhibit ALPHA-TOCOPHEROL activity. By virtue of the phenolic hydrogen on the 2H-1-benzopyran-6-ol nucleus, these compounds exhibit varying degree of antioxidant activity, depending on the site and number of methyl groups and the type of ISOPRENOIDS.