Figure 9. The proposed novel mechanism by which miR-25-3p affects angiogenesis in aged mice via the TULA-2/SYK/VEGFR-2 pathway. Aged ECs utilize miR-25-3p to target TULA-2 as a downstream effector to transduce signals, further downregulating and suppressing the phosphorylation of SYK Y323 and VEGFR-2 Y1175 and thus suppressing the angiogenesis pathway and inhibiting the proliferation, migration and tube formation abilities of aged ECs.