Pro-angiogenic role of C1q in various contexts

Angiogenic role of C1q in:Key finding(s)Model(s)Reference
PregnancyC1q acts as a molecular bridge between DECs and invading trophoblast, triggering the activation of ERK1/MAPK signaling cascadeIn vitro assays (human): DECs, trophoblasts[14]
Wound healingC1q is expressed at the wound site and has a pro-angiogenic effect similar to VEGF; involvement of gC1qR

In vitro assays (human): HUVECs

Ex vivo assays (rat): aortic ring assay

[13]
Post-strokeC1q stimulates the formation of new capillaries, having a pro-angiogenic effect; involvement of LIAR1

In vivo assays (rat): pMCAO rat model

In vitro assays (human and rat): RBMECs and HBMECs

[91]
CancerC1q stimulates angiogenesis in some types of tumorsIn vivo assays (mouse): C1qa–/– mouse[92]

HUVECs: human umbilical vein ECs; pMCAO: permanent middle cerebral artery occlusion; RBMECs: rat brain microvascular ECs; HBMECs: human brain microvascular ECs; LIAR1: leukocyte-associated Ig-like receptor 1