Overexpression of miR-137-3p or miR-let-7a in the hippocampal CA1 regions, in the central amygdala, or the medial prefrontal cortex of rats ameliorated streptozotocin-induced memory impairment while concurrently reducing the mRNA level of their direct target, the monoacylglycerol lipase-encoding MAGL [49]. The gene discussed is MGLL; the disease is memory impairment.