Role of thyroid hormones in regulation of sphingomyelin metabolism in the liver. 1999

N A Babenko, and Y A Natarova
Kharkov State University, Institute of Biology, Kharkov, 310077, Ukraine. Natalia.A.Babenko@kharkov.ua

Inhibition of thyroid gland function in rats with mercasolil sharply decreased thyroxine and triiodothyronine levels in blood serum and increased acid sphingomyelinase activity and sphingomyelin content in liver. Thyroxine injected into hypothyroid rats normalized the sphingomyelin content, reduced the free ceramide content, and further increased the acid sphingomyelinase activity in liver. Thyroxine stimulated de novo sphingomyelin synthesis. Changing the thyroid status of the rats did not influence the free sphingosine content. Thyroxine blocks the accumulation of free sphingosine in the liver during activation of sphingomyelinases.

UI MeSH Term Description Entries
D007037 Hypothyroidism A syndrome that results from abnormally low secretion of THYROID HORMONES from the THYROID GLAND, leading to a decrease in BASAL METABOLIC RATE. In its most severe form, there is accumulation of MUCOPOLYSACCHARIDES in the SKIN and EDEMA, known as MYXEDEMA. It may be primary or secondary due to other pituitary disease, or hypothalamic dysfunction. Central Hypothyroidism,Primary Hypothyroidism,Secondary Hypothyroidism,TSH Deficiency,Thyroid-Stimulating Hormone Deficiency,Central Hypothyroidisms,Deficiency, TSH,Deficiency, Thyroid-Stimulating Hormone,Hormone Deficiency, Thyroid-Stimulating,Hypothyroidism, Central,Hypothyroidism, Primary,Hypothyroidism, Secondary,Hypothyroidisms,Primary Hypothyroidisms,Secondary Hypothyroidisms,TSH Deficiencies,Thyroid Stimulating Hormone Deficiency,Thyroid-Stimulating Hormone Deficiencies
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
D008713 Methimazole A thioureylene antithyroid agent that inhibits the formation of thyroid hormones by interfering with the incorporation of iodine into tyrosyl residues of thyroglobulin. This is done by interfering with the oxidation of iodide ion and iodotyrosyl groups through inhibition of the peroxidase enzyme. Methymazol,Thiamazole,1-Methyl-2-mercaptoimidazole,Favistan,Mercasolyl,Mercazol,Mercazole,Mercazolyl,Merkazolil,Methizol,Methylmercaptoimidazole,Metisol,Metizol,Strumazol,Tapazole,Thiamazol Henning,Thiamazol Hexal,Thimazol,Thyrozol,Tiamazol,Tirodril,1 Methyl 2 mercaptoimidazole,Henning, Thiamazol,Hexal, Thiamazol
D002518 Ceramides Members of the class of neutral glycosphingolipids. They are the basic units of SPHINGOLIPIDS. They are sphingoids attached via their amino groups to a long chain fatty acyl group. They abnormally accumulate in FABRY DISEASE. Ceramide
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
D013108 Sphingomyelin Phosphodiesterase An enzyme that catalyzes the hydrolysis of sphingomyelin to ceramide (N-acylsphingosine) plus choline phosphate. A defect in this enzyme leads to NIEMANN-PICK DISEASE. EC 3.1.4.12. Sphingomyelin Cholinephosphohydrolase,Sphingomyelin Cleaving Enzyme,Sphingomyelinase,Sphingomyelinase C
D013109 Sphingomyelins A class of sphingolipids found largely in the brain and other nervous tissue. They contain phosphocholine or phosphoethanolamine as their polar head group so therefore are the only sphingolipids classified as PHOSPHOLIPIDS. Sphingomyelin
D013110 Sphingosine An amino alcohol with a long unsaturated hydrocarbon chain. Sphingosine and its derivative sphinganine are the major bases of the sphingolipids in mammals. (Dorland, 28th ed) 4-Sphingenine,4 Sphingenine
D013211 Staphylococcus aureus Potentially pathogenic bacteria found in nasal membranes, skin, hair follicles, and perineum of warm-blooded animals. They may cause a wide range of infections and intoxications.

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