JAK2 and neoplasm: PLA2R1 has been shown to function as a tumor suppressor by inducing cellular senescence via the increased production of reactive oxygen species in mitochondria, suppression of PARP1 expression and activation of the p53 pathway in PLA2R1-overexpressing cells [45, 46], and it inhibited cell transformation into tumor cells via downstream estrogen-related receptor α1 and JAK2 signaling [47, 48].