Recurrent Muscle Weakness with Rhabdomyolysis, Metabolic Crises, and Cardiac Arrhythmia due to Bi-allelic Mutations

The underlying genetic etiology of rhabdomyolysis remains elusive in a significant fraction of individuals presenting with recurrent metabolic crises and muscle weakness. Using exome sequencing, we identified bi-allelic mutations in TANGO2 encoding transport and Golgi organization 2 homolog (Drosophila) in 12 subjects with episodic rhabdomyolysis, hypoglycemia, hyperammonemia, and susceptibility to life-threatening cardiac tachyarrhythmias. A recurrent homozygous c.460G>A (p.Gly154Arg) mutation was found in four unrelated individuals of Hispanic/Latino origin, and a homozygous ∼34 kb deletion affecting exons 3–9 was observed in two families of European ancestry.

Source: The American Journal of Human Genetics - January 21, 2016 Category: Genetics & Stem Cells Authors: Seema R. Lalani, Pengfei Liu, Jill A. Rosenfeld, Levi B. Watkin, Theodore Chiang, Magalie S. Leduc, Wenmiao Zhu, Yan Ding, Shujuan Pan, Francesco Vetrini, Christina Y. Miyake, Marwan Shinawi, Tomasz Gambin, Mohammad K. Eldomery, Zeynep Hande Coban Tags: Report Source Type: research