TET2 and brain infarction: Using BV2 microglia, Qingyi Ma et al. found that knocking down TET2 worsened neonatal HI-induced brain infarct and neurological deficits and reversed the neuroprotective effect of miR-210 inhibition, the miR-210-TET2 axis regulated pro-inflammatory response in microglia (Ma et al., 2021).