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N-Acetyl-L-tyrosine is an amino acid, an N-acetyl derivative of tyrosine. It is used for parenteral nutrition and as a dietary supplement. [1] [2] [3] See also.
It is a 4-hydroxyphenylpyruvate dioxygenase inhibitor indicated for the treatment of hereditary tyrosinemia type 1 (HT-1) in combination with dietary restriction of tyrosine and phenylalanine. [7] Liver transplant is indicated for patients with tyrosinemia type I who do not respond to nitisinone, as well as those with acute liver failure and ...
Research shows that nitrotyrosine levels can be reduced by N-acetyl cysteine, [10] [11] which is a precursor to glutathione, one of the body's primary endogenous antioxidants. Nitrotyrosine levels have been linked to cerebral ischemia and edema, for which NAC has also been proven as a potential treatment. [12]
The liver is the organ affected most by Tyrosinemia Type I due to the high level of expression of the gene for fumarylacetoacetate hydrolase (FAH) in liver cells. The production of blood coagulation factors by the liver is disrupted, causing hemophiliac-like symptoms. Acute liver failure is common, especially in early life.
Hepatotoxicity (from hepatic toxicity) implies chemical-driven liver damage. Drug-induced liver injury (DILI) is a cause of acute and chronic liver disease caused specifically by medications and the most common reason for a drug to be withdrawn from the market after approval.
Cirrhosis, also known as liver cirrhosis or hepatic cirrhosis, chronic liver failure or chronic hepatic failure and end-stage liver disease, is an acute condition of the liver in which the normal functioning tissue, or parenchyma, is replaced with scar tissue and regenerative nodules as a result of chronic liver disease.
The disease results from a deficiency in hepatic tyrosine aminotransferase. [10] Tyrosinemia type II (Richner-Hanhart syndrome, RHS) is a disease of autosomal recessive inheritance characterized by keratitis, palmoplantar hyperkeratosis, mental retardation, and elevated blood tyrosine levels. [10] Keratitis in Tyrosinemia type II patients is ...
N-acetyltransferase (NAT) is an enzyme that catalyzes the transfer of acetyl groups from acetyl-CoA to arylamines, arylhydroxylamines and arylhydrazines. [ 1 ] [ 2 ] [ 3 ] They have wide specificity for aromatic amines , particularly serotonin , and can also catalyze acetyl transfer between arylamines without CoA.