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3,5,3',5'-TETRAIODO-L-THYRONINE
 
T44 is found in 20 entries
T44
  •   Chemical Component Summary   Hide
    Name 3,5,3',5'-TETRAIODO-L-THYRONINE
    Identifiers O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine
    (2S)-2-amino-3-[4-(4-hydroxy-3,5-diiodo-phenoxy)-3,5-diiodo-phenyl]propanoic acid
    Formula C15 H11 I4 N O4
    Molecular Weight 776.87 g/mol
    Type non-polymer
    Isomeric SMILES
    InChI
    InChI key XUIIKFGFIJCVMT-LBPRGKRZSA-N
     
  •   Drug Info: DrugBank Hide
    DrugBank ID DB00451   (Stereoisomeric match)
    Name Levothyroxine
    Groups approved
    Description The major hormone derived from the thyroid gland. Thyroxine is synthesized via the iodination of tyrosines (monoiodotyrosine) and the coupling of iodotyrosines (diiodotyrosine) in the thyroglobulin. Thyroxine is released from thyroglobulin by proteolysis and secreted into the blood. Thyroxine is peripherally deiodinated to form triiodothyronine which exerts a broad spectrum of stimulatory effects on cell metabolism. [PubChem]
    Synonyms
    • 3,3',5,5'-Tetraiodo-L-thyronine
    • 3,5,3',5'-TETRAIODO-L-thyronine
    • 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodo-L-phenylalanine
    • L-T4
    • L-Thyroxine
    • Levothyroxin
    • Levothyroxine
    • LT4
    • O-(4-Hydroxy-3,5-diidophenyl)-3,5-diiodo-L-tyrosine
    • O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine
    • T4
    [more]
    Salts Levothyroxine Sodium
    Brand names
    • Eltroxin
    • Euthyrox
    • Eutirox
    • Letrox
    • Levaxin
    • Levothroid
    • Levothyrox
    • Levoxyl
    • Novothyrox
    • Oroxine
    • Synthroid
    • Thyrax
    • Tirosint
    • Unithroid
    [more]
    Affected organism Humans and other mammals
    Indication For use alone or in combination with antithyroid agents to treat hypothyroidism, goiter, chronic lymphocytic thyroiditis, myxedema coma, and stupor.
    Pharmacology Levothyroxine (T<sub>4</sub>) is a synthetically prepared levo isomer of thyroxine, the major hormone secreted from the thyroid gland. Thyroxine is released from thyroglobulin by proteolysis and secreted into the blood. Thyroxine is peripherally deiodinated to form triiodothyronine (T<sub>3</sub>) which exerts a broad spectrum of stimulatory effects on cell metabolism. Thyroid hormone increases the metabolic rate of cells of all tissues in the body. In the fetus and newborn, thyroid hormone is important for the growth and development of all tissues including bones and the brain. In adults, thyroid hormone helps to maintain brain function, food metabolism, and body temperature, among other effects. The symptoms of thyroid deficiency relieved by levothyroxine include slow speech, lack of energy, weight gain, hair loss, dry thick skin and unusual sensitivity to cold.
    Mechanism of action Levothyroxine acts like the endogenous thyroid hormone thyroxine (T<sub>4</sub>, a tetra-iodinated tyrosine derivative). In the liver and kidney, T<sub>4</sub> is converted to T<sub>3</sub>, the active metabolite. In order to increase solubility, the thyroid hormones attach to thyroid hormone binding proteins, thyroxin-binding globulin, and thyroxin-binding prealbumin (transthyretin). Transport and binding to thyroid hormone receptors in the cytoplasm and nucleus then takes place. Thus by acting as a replacement for natural thyroxine, symptoms of thyroxine deficiency are relieved.
    Route of administration
    • Oral
    • Parenteral
    ATC-Code H03AA01
    AHFS-Code 68:36.04
    CAS number 51-48-9
    Targets
    Name Sequence search Pharmacological action Actions
    Thyroid hormone receptor beta   Search  yes agonist
    Thyroid hormone receptor alpha   Search  yes agonist
     
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