Effect of thiamine deficiency, pyrithiamine and oxythiamine on pyruvate metabolism in rat liver and brain in vivo. 1977

S K Meghal, and R M O'Neal, and R E Koeppe

Rats were fed either a thiamine-deficient diet of diets containing pyrithiamine or oxythiamine. When symptoms of thiamine deficiency appeared, the animals were injected intraperitoneally with [2-14C] pyruvate six to twelve minutes prior to sacrifice. Free glutamic and aspartic acids were isolated from liver and brain and degraded. The results indicate that, in thiamine-deficient or oxythiamine-treated rats, pyruvate metabolism in liver and brain is similar to that in normal animals. In contrast, pyrithiamine drastically decreases the oxidative decarboxylation of pyruvate by rat liver.

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
D010119 Oxythiamine Thiamine antagonist, antimetabolite. Hydroxythiamine
D011726 Pyridinium Compounds Derivatives of PYRIDINE containing a cation C5H5NH or radical C5H6N. Compounds, Pyridinium
D011745 Pyrithiamine A thiamine antagonist due to its inhibition of thiamine pyrophosphorylation. It is used to produce thiamine deficiency. Heterovitamin B 1,Neopyrithiamine,1, Heterovitamin B,B 1, Heterovitamin
D011773 Pyruvates Derivatives of PYRUVIC ACID, including its salts and esters.
D001835 Body Weight The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms. Body Weights,Weight, Body,Weights, Body
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
D003653 Decarboxylation The removal of a carboxyl group, usually in the form of carbon dioxide, from a chemical compound. Decarboxylations
D005971 Glutamates Derivatives of GLUTAMIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain the 2-aminopentanedioic acid structure. Glutamic Acid Derivatives,Glutamic Acids,Glutaminic Acids

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