DMD and Duchenne muscular dystrophy: To test this hypothesis, here we cultured immortalized human DMD (fascia-lata of a 10 year old male with an exon 52 deletion in the dystrophin gene) and healthy control (CON; paraspinal muscle of a 12 year old female) myoblasts as described previously by us [28] (supplementary information) with 1 mM NIT (nitrate cannot be converted to NIT in cell models) for 24 h.