VEGFA and Bloom syndrome: Furthermore, compared to Normal and PBS group, we found that VEGF was upregulated in BLM group (P < 0.001), but there was no significant difference among BLM, BLM + WYHZTL-L, BLM + WYHZTL-M, BLM + WYHZTL-H and BLM + XAV-939 group (P > 0.05).