Thursday, September 15, 2016

Dietary Minerals Cobalamin absorption: Mammalian physiology and acquired and inherited disorders

Kyle J. Norton(Scholar, Master of Nutrients), all right reserved.
Health article writer and researcher; Over 10.000 articles and research papers have been written and published on line, including world wide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the karate GB daily, etc.,.
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Some articles have been used as references in medical research, such as international journal Pharma and Bio science, ISSN 0975-6299.

                                 Dietary Minerals 

Dietary Minerals are the group of minerals which is essential for our body to sustain normal functions and physical health.

                                        Cobalt

Cobalt is one of many essential mineral needed by our body in very small amounts to enhance productions of red blood cell and the formation of myelin nerve coverings It also is vital as a necessary cofactor for making the thyroid hormone thyroxine and stored in the red blood cells, the plasma, liver, kidney, spleen, pancreas, etc.


                           Cobalamin absorption: Mammalian physiology and acquired and inherited disorders
Vitamin B12 (cobalamin) is a cobalt-containing compound synthesized by bacteria and an essential nutrient in mammals, which take it up from diet. mIn the review to summarize the causes leading to vitamin B12 deficiency including decreased intake, impaired absorption and increased requirements, found that under physiological conditions, vitamin B12 bound to the gastric intrinsic factor is internalized in the ileum by a highly specific receptor complex composed by Cubilin (Cubn) and Amnionless (Amn). Following exit of vitamin B12 from the ileum, general cellular uptake from the circulation requires the transcobalamin receptor CD320 whereas kidney reabsorption of cobalamin depends on Megalin (Lrp2). Whereas malabsorption of vitamin B12 is most commonly seen in the elderly, selective pediatric, nondietary-induced B12 deficiency is generally due to inherited disorders including the Imerslund-Gräsbeck syndrome and the much rarer intrinsic factor deficiency. Biochemical, clinical and genetic research on these disorders considerably improved our knowledge of vitamin B12 absorption. This review describes basic and recent findings on the intestinal handling of vitamin B12 and its importance in health and disease(2).
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