Mitochondrial Myopathy and Sideroblastic Anemia (MLASA)

A distinct mitochondrial myopathy, lactic acidosis and sideroblastic anemia (MLASA) phenotype associates with YARS2 mutations

Nuclear-encoded disorders of mitochondrial translation are clinically and genetically heterogeneous. Genetic causes include defects of mitochondrial aminoacyl-tRNA synthetases, and factors required for initiation, elongation and termination of protein synthesis as well as ribosome recycling. We report on a new case of myopathy, lactic acidosis and sideroblastic anemia (MLASA) syndrome caused by...

A Myopathy, Lactic Acidosis, Sideroblastic Anemia (MLASA) Case Due to a Novel PUS1 Mutation

The patient, the first child of Turkish first-cousins, was born at term after an uncomplicated pregnancy. Birth parameters were normal. The family history was negative for hematological or neurological diseases. The newborn period was characterized by hypoglycemia, lactic acidemia (6.1 mmol/L; normal values: up to 1.9 mmol/L), and lactic, pyruvic, and dicarboxylic aciduria. At 10 months of age,...

Coenzyme Q is effective on anemia in a patient with sideroblastic anemia and mitochondrial myopathy.

Mitochondrial myopathy and sideroblastic anemia (MLASA): missense mutation in the pseudouridine synthase 1 (PUS1) gene is associated with the loss of tRNA pseudouridylation.

A missense mutation in the PUS1 gene affecting a highly conserved amino acid has been associated with mitochondrial myopathy and sideroblastic anemia (MLASA), a rare autosomal recessive oxidative phosphorylation disorder. The PUS1 gene encodes the enzyme pseudouridine synthase 1 (Pus1p) that is known to pseudouridylate tRNAs in other species. Total RNA was isolated from lymphoblastoid cell line...

Sideroblastic anemia.

When first defined 50 years ago, sideroblastic anemia (SA) was already recognized to occur in heterogeneous settings, including as familial or acquired disease. The spectrum of SA has since become considerably expanded with respect to distinct clinical phenotypes as well as discrete causes. The singular feature that typifies all forms of SA and is required for initial diagnosis is the presence ...