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). Thiamine에 대한 Mechanism_Of_Action 정보 It is thought that the mechanism of action of thiamine on endothelial cells is related to a reduction in intracellular protein glycation by redirecting the glycolytic flux.
Pharmacology
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. Thiamine에 대한 Pharmacology 정보 Thiamine is a vitamin with antioxidant, erythropoietic, cognition-and mood-modulatory, antiatherosclerotic, putative ergogenic, and detoxification activities. Thiamine has been found to protect against lead-induced lipid peroxidation in rat liver and kidney. Thiamine deficiency results in selective neuronal death in animal models. The neuronal death is associated with increased free radical production, suggesting that oxidative stress may play an important early role in brain damage associated with thiamine deficiency. Thiamine plays a key role in intracellular glucose metabolism and it is thought that thiamine inhibits the effect of glucose and insulin on arterial smooth muscle cell proliferation. Inhibition of endothelial cell proliferation may also promote atherosclerosis. Endothelial cells in culture have been found to have a decreased proliferative rate and delayed migration in response to hyperglycemic conditions. Thiamine has been shown to inhibit this effect of glucose on endothelial cells.
Metabolism
Pyridoxine에 대한 Metabolism 정보 # Phase_1_Metabolizing_Enzyme:Methylenetetrahydrofolate reductase
Protein Binding
Pyridoxine에 대한 단백결합 정보 22% Thiamine에 대한 단백결합 정보 90-94%
Half-life
Pyridoxine에 대한 반감기 정보 15-20 days
Absorption
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. Thiamine에 대한 Absorption 정보 Absorbed mainly from duodenum, by both active and passive processes
소실 : 용량의존적으로 미변화체 및 대사체로서 신배설된다. (생리적 용량에서는 소량만이 미변화체로 신배설되나 고용량 투여시 주로 미변화체로 신배설된다.)
Thiamine nitrate의 약물동력학자료
흡수 :
경구 : 최대흡수량 : 8-15 mg/day
근육주사 : 신속하고 완전하게 흡수된다.
분포 : 최소요구량 (약 1 mg/day)을 초과 섭취시 조직 저장에 포화가 나타난다.
소실 : 과잉 섭취된 양은 뇨를 통해 배설된다.
Ascorbic Acid의 약물동력학자료
흡수 :
소장에서 거의 완전히 흡수된다.
흡수는 능동수송을 통해 이루어지며 용량의존적이라 여겨진다. (고용량에서 흡수 포화)
분포 : 널리 분포
단백결합 : 약 25%
대사 : 간에서 산화 및 황산 포합 등으로 대사된다.
반감기 : 16일
고용량 투여시 : 3.4 시간
혈중최고농도 도달시간 : 정상 성인 : 2-3 시간
소실 :
주 배설 경로는 신장 및 담즙이다.
신배설은 용량의존적으로, 투여량이 증가하면 신배설량 및 속도가 증가한다.
Biotransformation
Thiamine에 대한 Biotransformation 정보 Hepatic
Toxicity
Pyridoxine에 대한 Toxicity 정보 Oral Rat LD50 = 4 gm/kg. Toxic effects include convulsions, dyspnea, hypermotility, diarrhea, ataxia and muscle weakness. Thiamine에 대한 Toxicity 정보 Thiamine toxicity is uncommon; as excesses are readily excreted, although long-term supplementation of amounts larger than 3 gram have been known to cause toxicity. Oral mouse LD50 = 8224 mg/kg, oral rat LD50 = 3710 mg/kg.
Drug Interactions
Pyridoxine에 대한 Drug_Interactions 정보 Not Available Thiamine에 대한 Drug_Interactions 정보 Not Available
Nicotinamide에 대한 Description 정보 An important compound functioning as a component of the coenzyme NAD. Its primary significance is in the prevention and/or cure of blacktongue and pellagra. Most animals cannot manufacture this compound in amounts sufficient to prevent nutritional deficiency and it therefore must be supplemented through dietary intake. [PubChem] 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] Thiamine에 대한 Description 정보 3-((4-Amino-2-methyl-5-pyrimidinyl)methyl)-5-(2- hydroxyethyl)-4-methylthiazolium chloride. [PubChem]
Dosage Form
Pyridoxine에 대한 Dosage_Form 정보 Liquid IntramuscularSolution IntramuscularSolution / drops OralTablet Oral Thiamine에 대한 Dosage_Form 정보 Liquid IntramuscularLiquid IntravenousSolution IntravenousTablet Oral
Drug Category
Nicotinamide에 대한 Drug_Category 정보 Vitamin B Complex Pyridoxine에 대한 Drug_Category 정보 Anti-inflammatory AgentsEssential VitaminVitamin B ComplexVitamins (Vitamin B Complex) Thiamine에 대한 Drug_Category 정보 Anti-inflammatory AgentsEssential VitaminVitamin B ComplexVitamins (Vitamin B Complex)
Smiles String Canonical
Nicotinamide에 대한 Smiles_String_canonical 정보 NC(=O)C1=CC=CN=C1 Pyridoxine에 대한 Smiles_String_canonical 정보 CC1=NC=C(CO)C(CO)=C1O Thiamine에 대한 Smiles_String_canonical 정보 CC1=NC=C(C[N+]2=CSC(CCO)=C2C)C(N)=N1
Smiles String Isomeric
Nicotinamide에 대한 Smiles_String_isomeric 정보 NC(=O)C1=CC=CN=C1 Pyridoxine에 대한 Smiles_String_isomeric 정보 CC1=NC=C(CO)C(CO)=C1O Thiamine에 대한 Smiles_String_isomeric 정보 CC1=NC=C(C[N+]2=CSC(CCO)=C2C)C(N)=N1
InChI Identifier
Nicotinamide에 대한 InChI_Identifier 정보 InChI=1/C6H6N2O/c7-6(9)5-2-1-3-8-4-5/h1-4H,(H2,7,9)/f/h7H2 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 Thiamine에 대한 InChI_Identifier 정보 InChI=1/C12H17N4OS/c1-8-11(3-4-17)18-7-16(8)6-10-5-14-9(2)15-12(10)13/h5,7,17H,3-4,6H2,1-2H3,(H2,13,14,15)/q+1/f/h13H2
Chemical IUPAC Name
Nicotinamide에 대한 Chemical_IUPAC_Name 정보 pyridine-3-carboxamide Pyridoxine에 대한 Chemical_IUPAC_Name 정보 4,5-bis(hydroxymethyl)-2-methylpyridin-3-ol Thiamine에 대한 Chemical_IUPAC_Name 정보 2-[3-[(4-amino-2-methylpyrimidin-5-yl)methyl]-4-methyl-1,3-thiazol-3-ium-5-yl]ethanol
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최근정보수정일 2024-04-05
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