Cyanocobalamin에 대한 Mechanism_Of_Action 정보 Vitamin B12 is used in the body in two forms: Methylcobalamin and 5-deoxyadenosyl cobalamin. The enzyme methionine synthase needs methylcobalamin as a cofactor. This enzyme is involved in the conversion of the amino acid homocysteine into methionine. Methionine in turn is required for DNA methylation. 5-Deoxyadenosyl cobalamin is a cofactor needed by the enzyme that converts L-methylmalonyl-CoA to succinyl-CoA. This conversion is an important step in the extraction of energy from proteins and fats. Furthermore, succinyl CoA is necessary for the production of hemoglobin, the substances that carries oxygen in red blood cells. Pyridoxine에 대한 Mechanism_Of_Action 정보 Vitamin B6 is the collective term for a group of three related compounds, pyridoxine (PN), pyridoxal (PL) and pyridoxamine (PM), and their phosphorylated derivatives, pyridoxine 5'-phosphate (PNP), pyridoxal 5'-phosphate (PLP) and pyridoxamine 5'-phosphate (PMP). Although all six of these compounds should technically be referred to as vitamin B6, the term vitamin B6 is commonly used interchangeably with just one of them, pyridoxine. Vitamin B6, principally in the form of the coenzyme pyridoxal 5'-phosphate, is involved in a wide range of biochemical reactions, including the metabolism of amino acids and glycogen, the synthesis of nucleic acids, hemogloblin, sphingomyelin and other sphingolipids, and the synthesis of the neurotransmitters serotonin, dopamine, norepinephrine and gamma-aminobutyric acid (GABA).
Pharmacology
Cyanocobalamin에 대한 Pharmacology 정보 Cyanocobalamin (Vitamin B12) is a water-soluble organometallic compound with a trivalent cobalt ion bound inside a corrin ring. It is needed for nerve cells and red blood cells, and to make DNA. Vitamin B12 deficiency is the cause of several forms of anemia. Pyridoxine에 대한 Pharmacology 정보 Vitamin B6 (pyridoxine) is a water-soluble vitamin used in the prophylaxis and treatment of vitamin B6 deficiency and peripheral neuropathy in those receiving isoniazid (isonicotinic acid hydrazide, INH). Vitamin B6 has been found to lower systolic and diastolic blood pressure in a small group of subjects with essential hypertension. Hypertension is another risk factor for atherosclerosis and coronary heart disease. Another study showed pyridoxine hydrochloride to inhibit ADP- or epinephrine-induced platelet aggregation and to lower total cholesterol levels and increase HDL-cholesterol levels, again in a small group of subjects. Vitamin B6, in the form of pyridoxal 5'-phosphate, was found to protect vascular endothelial cells in culture from injury by activated platelets. Endothelial injury and dysfunction are critical initiating events in the pathogenesis of atherosclerosis. Human studies have demonstrated that vitamin B6 deficiency affects cellular and humoral responses of the immune system. Vitamin B6 deficiency results in altered lymphocyte differentiation and maturation, reduced delayed-type hypersensitivity (DTH) responses, impaired antibody production, decreased lymphocyte proliferation and decreased interleukin (IL)-2 production, among other immunologic activities.
Metabolism
Cyanocobalamin에 대한 Metabolism 정보 # Phase_1_Metabolizing_Enzyme:Methylenetetrahydrofolate reductase Pyridoxine에 대한 Metabolism 정보 # Phase_1_Metabolizing_Enzyme:Methylenetetrahydrofolate reductase
Protein Binding
Cyanocobalamin에 대한 단백결합 정보 Very high (to specific plasma proteins called transcobalamins); binding of hydroxocobalamin is slightly higher than cyanocobalamin. Pyridoxine에 대한 단백결합 정보 22%
Half-life
Cyanocobalamin에 대한 반감기 정보 Approximately 6 days (400 days in the liver). Pyridoxine에 대한 반감기 정보 15-20 days
Absorption
Cyanocobalamin에 대한 Absorption 정보 Readily absorbed in the lower half of the ileum. Pyridoxine에 대한 Absorption 정보 The B vitamins are readily absorbed from the gastrointestinal tract, except in malabsorption syndromes. Pyridoxine is absorbed mainly in the jejunum.
Cyanocobalamin에 대한 Description 정보 Cyanocobalamin (commonly known as Vitamin B12) is the most chemically complex of all the vitamins. Cyanocobalamin's structure is based on a corrin ring, which, although similar to the porphyrin ring found in heme, chlorophyll, and cytochrome, has two of the pyrrole rings directly bonded. The central metal ion is Co (cobalt). Cyanocobalamin cannot be made by plants or by animals, as the only type of organisms that have the enzymes required for the synthesis of cyanocobalamin are bacteria and archaea. Higher plants do not concentrate cyanocobalamin from the soil and so are a poor source of the substance as compared with animal tissues. Cyanocobalamin is naturally found in foods including meat (especially liver and shellfish), eggs, and milk products. [HMDB] Pyridoxine에 대한 Description 정보 The 4-methanol form of vitamin B 6 which is converted to pyridoxal phosphate which is a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. Although pyridoxine and Vitamin B 6 are still frequently used as synonyms, especially by medical researchers, this practice is erroneous and sometimes misleading (EE Snell; Ann NY Acad Sci, vol 585 pg 1, 1990). [PubChem]
Dosage Form
Cyanocobalamin에 대한 Dosage_Form 정보 Capsule OralLiquid IntramuscularLiquid OralPowder OralSolution IntramuscularTablet OralTablet, extended release Oral Pyridoxine에 대한 Dosage_Form 정보 Liquid IntramuscularSolution IntramuscularSolution / drops OralTablet Oral
Drug Category
Cyanocobalamin에 대한 Drug_Category 정보 Antianemic AgentsEssential VitaminVitamins (Vitamin B Complex) Pyridoxine에 대한 Drug_Category 정보 Anti-inflammatory AgentsEssential VitaminVitamin B ComplexVitamins (Vitamin B Complex)
Smiles String Canonical
Cyanocobalamin에 대한 Smiles_String_canonical 정보 [Co+3].[C-] Pyridoxine에 대한 Smiles_String_canonical 정보 CC1=NC=C(CO)C(CO)=C1O
Smiles String Isomeric
Cyanocobalamin에 대한 Smiles_String_isomeric 정보 [Co+3].[C-] Pyridoxine에 대한 Smiles_String_isomeric 정보 CC1=NC=C(CO)C(CO)=C1O
InChI Identifier
Cyanocobalamin에 대한 InChI_Identifier 정보 InChI=1/C62H90N13O14P.CN.Co/c1-29-20-39-40(21-30(29)2)75(28-70-39)57-52(84)53(41(27-76)87-57)89-90(85,86)88-31(3)26-69-49(83)18-19-59(8)37(22-46(66)80)56-62(11)61(10,25-48(68)82)36(14-17-45(65)79)51(74-62)33(5)55-60(9,24-47(67)81)34(12-15-43(63)77)38(71-55)23-42-58(6,7)35(13-16-44(64)78)50(72-42)32(4)54(59)73-56;1-2;/h20-21,23,28,31,34-37,41,52-53,56-57,76,84H,12-19,22,24-27H2,1-11H3,(H15,63,64,65,66,67,68,69,71,72,73,74,77,78,79,80,81,82,83,85,86);;/q;-1;+3/p-1/t31?,34-,35-,36-,37+,41+,52?,53?,56?,57+,59-,60+,61+,62+;;/m1../s1/fC62H89N13O14P.CN.Co/h69,85H,63-68H2;;/q-1;2m/b42-23-,54-32-,55-33-;; Pyridoxine에 대한 InChI_Identifier 정보 InChI=1/C8H11NO3/c1-5-8(12)7(4-11)6(3-10)2-9-5/h2,10-12H,3-4H2,1H3
Chemical IUPAC Name
Cyanocobalamin에 대한 Chemical_IUPAC_Name 정보 Not Available Pyridoxine에 대한 Chemical_IUPAC_Name 정보 4,5-bis(hydroxymethyl)-2-methylpyridin-3-ol
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