Beginning in early infancy, this condition is characterized by poor feeding, vomiting, lack of energy (lethargy), seizures , and developmental delay . Maple syrup urine disease (MSUD) is categorized as classic (severe), intermediate, or intermittent. If untreated, maple syrup urine disease can lead to seizures, coma, and death. Maple syrup disease (branched-chain ketoaciduria) is an autosomal recessive disorder caused by mutations in branched-chain 2-oxo acid dehydrogenase. Your body breaks down the protein you eat into parts called amino acids. In Maple syrup urine disease, the breakdown of BRANCHED amino acids (L eucine, I soleucine, and V aline) is impaired. In maple syrup urine disease, the three branched-chain amino acids (leucine, isoleucine, and valine) cannot be metabolized (processed), and they build up in the blood, causing problems with brain function and … Cystinuria [39] Definition: : an inherited disease characterized by the accumulation of cystine in the kidneys and bladder due to a disruption of amino acid transporter function in the proximal convoluted tubule and intestine. dehydrogenase deficiency, BCKD deficiency, BCKDH deficiency, ketoacid decarboxylase deficiency Maple syrup urine disease (MSUD) is an autosomal recessive condition with an incidence of approximately 1 in 150 000 live births with a higher incidence amongst children from consanguineous relationships [1]. The most common and severe form of the disease is the classic type, which becomes apparent soon after birth. Keywords: Maple syrup urine disease, DBT gene mutation, Thiamine, Children Background Maple syrup urine disease (MSUD) is a rare meta-bolic disorder of autosomal recessive inheritance caused by decreased activity of the branched-chain α-ketoacid dehydrogenase (BCKD) complex. Maple syrup urine disease: A hereditary disease that is due to deficiency of an enzyme involved in amino acid metabolism, characterized by urine that smells like maple syrup. Maple syrup urine disease is an inherited (genetic) condition that prevents the body from processing proteins correctly. Maple syrup urine disease: A hereditary disease that is due to deficiency of an enzyme involved in amino acid metabolism, characterized by urine that smells like maple syrup. Your body then uses those amino acids to make other proteins that it needs to function. [1] in 1954. This enzyme plays a vital role in the catabolism of the branched-chain amino acids. Maple syrup urine disease (MSUD), also called branched-chain aminoaciduria, is so called because the urine of affected individuals smells like maple syrup or burnt sugar. Maple syrup urine disease (MSUD) is a life-threatening metabolic disorder. Maple syrup urine disease is an inherited disorder in which the body is unable to process certain protein building blocks (amino acids) properly. Maple syrup urine disease (MSUD) is classified as classic or intermediate. In maple syrup urine disease, the three branched-chain amino acids (leucine, isoleucine, and valine) cannot be metabolized (processed), and they build up in the blood, causing problems with brain function and … Certain enzymes break down a specific type of amino acid called branched-chain amino acids. Proteins are made up of 20 different types of amino acids. Metabolic disorders are conditions in which your body can’t function normally because it can’t properly convert food to energy to keep your body healthy. 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