Biomaterial Database

Tissue minerals of magnesium-deficient rats with thiamine deficiency and excess. 1987

Y Itokawa

To clarify the influence of thiamine deficiency or a dietary excess of thiamine on the mineral balance in magnesium-deficient animals, the following six different synthetic diets were fed to Wistar rats. Group 1: thiamine and magnesium-deficient; group 2: thiamine-deficient, magnesium-deficient; group 3: thiamine-sufficient, magnesium-deficient; group 4: thiamine-sufficient, magnesium-sufficient; group 5: thiamine excess, magnesium-deficient; group 6: thiamine excess, magnesium-sufficient. Rats were sacrificed after 4 weeks of these dietary regimens. In the magnesium-deficient groups, magnesium levels in serum, bone and heart decreased; calcium levels in serum and heart increased and, in contrast, calcium levels in bone decreased. These changes in mineral concentration seen in magnesium-deficient animals, as well as kidney weight changes, were alleviated significantly when the animals were also deficient in thiamine. It can be presumed that thiamine deficiency inhibits magnesium depletion and, consequently, the influence of magnesium deficiency is less significant in the thiamine- and magnesium-deficient animals. In regard to trace elements, the significant changes seen in magnesium-deficient rats were as follows: zinc in liver, muscle and blood increased and that in bone decreased. Copper in blood, kidney, muscle and heart increased and that in liver decreased. Iron in serum, liver, spleen and kidney increased and that in whole blood decreased.

UI	MeSH Term	Description	Entries
D007501	Iron	A metallic element with atomic symbol Fe, atomic number 26, and atomic weight 55.85. It is an essential constituent of HEMOGLOBINS; CYTOCHROMES; and IRON-BINDING PROTEINS. It plays a role in cellular redox reactions and in the transport of OXYGEN.	Iron-56,Iron 56
D008275	Magnesium Deficiency	A nutritional condition produced by a deficiency of magnesium in the diet, characterized by anorexia, nausea, vomiting, lethargy, and weakness. Symptoms are paresthesias, muscle cramps, irritability, decreased attention span, and mental confusion, possibly requiring months to appear. Deficiency of body magnesium can exist even when serum values are normal. In addition, magnesium deficiency may be organ-selective, since certain tissues become deficient before others. (Harrison's Principles of Internal Medicine, 12th ed, p1936)	Deficiency, Magnesium,Deficiencies, Magnesium,Magnesium Deficiencies
D008903	Minerals	Native, inorganic or fossilized organic substances having a definite chemical composition and formed by inorganic reactions. They may occur as individual crystals or may be disseminated in some other mineral or rock. (Grant & Hackh's Chemical Dictionary, 5th ed; McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Mineral
D009206	Myocardium	The muscle tissue of the HEART. It is composed of striated, involuntary muscle cells (MYOCYTES, CARDIAC) connected to form the contractile pump to generate blood flow.	Muscle, Cardiac,Muscle, Heart,Cardiac Muscle,Myocardia,Cardiac Muscles,Heart Muscle,Heart Muscles,Muscles, Cardiac,Muscles, Heart
D001842	Bone and Bones	A specialized CONNECTIVE TISSUE that is the main constituent of the SKELETON. The principal cellular component of bone is comprised of OSTEOBLASTS; OSTEOCYTES; and OSTEOCLASTS, while FIBRILLAR COLLAGENS and hydroxyapatite crystals form the BONE MATRIX.	Bone Tissue,Bone and Bone,Bone,Bones,Bones and Bone,Bones and Bone Tissue,Bony Apophyses,Bony Apophysis,Condyle,Apophyses, Bony,Apophysis, Bony,Bone Tissues,Condyles,Tissue, Bone,Tissues, Bone
D002118	Calcium	A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.	Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
D003300	Copper	A heavy metal trace element with the atomic symbol Cu, atomic number 29, and atomic weight 63.55.	Copper-63,Copper 63
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
D013831	Thiamine	3-((4-Amino-2-methyl-5-pyrimidinyl)methyl)-5-(2- hydroxyethyl)-4-methylthiazolium chloride.	Aneurin,Vitamin B 1,Thiamin,Thiamine Mononitrate,Vitamin B1,Mononitrate, Thiamine
D013832	Thiamine Deficiency	A nutritional condition produced by a deficiency of THIAMINE in the diet, characterized by anorexia, irritability, and weight loss. Later, patients experience weakness, peripheral neuropathy, headache, and tachycardia. In addition to being caused by a poor diet, thiamine deficiency in the United States most commonly occurs as a result of alcoholism, since ethanol interferes with thiamine absorption. In countries relying on polished rice as a dietary staple, BERIBERI prevalence is very high. (From Cecil Textbook of Medicine, 19th ed, p1171)	Deficiency, Thiamine,Deficiencies, Thiamine,Thiamine Deficiencies