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| Prepair 1000+ v3.0 | MMUT | Gene symbol changed from MUT to MMUT during gene set migration (ENSG00000146085 -> ENSG00000146085) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prepair 1000+ v1.1367 | MUT |
Lauren Thomas changed review comment from: Isolated methylmalonic aciduria is found in patients with mutations in the MUT gene causing partial, mut(-), or complete, mut(0), enzyme deficiency. Variable severity and age of onset: • Infantile completely deficient (mut0) or non-B12-responsive (clbB) is the most common phenotype and presents during infancy. Infants are normal at birth, but develop lethargy, vomiting, and dehydration within the first few months of life. They may also exhibit hepatomegaly, hypotonia, encephalopathy, metabolic acidosis, ketosis and ketonuria, hyperammonemia, and hyperglycemia. • Partially deficient (mut-) or B12-responsive (cblA, cblD, rarely cblB) is an intermediate phenotype that can occur in the first few months or years of life. Symptoms include feeding problems, failure to thrive, hypotonia, and developmental delay. Some have protein aversion and vomiting, and lethargy after protein intake. HGNC approved symbol/name: MMUT * Is the phenotype(s) severe and onset <18yo? Yes Treatments available: cobalamin, N-carbamylglutamate, carnitine, diet, liver transplant Known technical challenges? No Gene reported in 3 independent families: Yes * NOTE: gene previously called MUT; to: Isolated methylmalonic aciduria is found in patients with mutations in the MUT gene causing partial, mut(-), or complete, mut(0), enzyme deficiency. Variable severity and age of onset: • Infantile completely deficient (mut0) or non-B12-responsive (clbB) is the most common phenotype and presents during infancy. Infants are normal at birth, but develop lethargy, vomiting, and dehydration within the first few months of life. They may also exhibit hepatomegaly, hypotonia, encephalopathy, metabolic acidosis, ketosis and ketonuria, hyperammonemia, and hyperglycemia. • Partially deficient (mut-) or B12-responsive (cblA, cblD, rarely cblB) is an intermediate phenotype that can occur in the first few months or years of life. Symptoms include feeding problems, failure to thrive, hypotonia, and developmental delay. Some have protein aversion and vomiting, and lethargy after protein intake. HGNC approved symbol/name: MMUT * Is the phenotype(s) severe and onset <18yo? Yes Treatments available: cobalamin, N-carbamylglutamate, carnitine, diet, liver transplant Known technical challenges? No Gene reported in 3 independent families: Yes * NOTE: gene previously called MUT |
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