Sigma nonopioid intracellular receptor 1 (SIGMAR1) is a protein enriched in motor neurons (MNs), and mutations in its gene have been previously linked to various motor neuron diseases (MNDs). Researchers from Welab Barcelona and affiliated organizations recently presented preclinical data for two novel SIGMAR ligands, EST-79232 and EST-79376, being evaluated as potential candidates for the prevention of MN degeneration.