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Mol Cell Biochem. 2017 Jan;424(1-2):57-67. doi: 10.1007/s11010-016-2842-7. Epub 2016 Oct 13.

C1ql1/Ctrp14 and C1ql4/Ctrp11 promote angiogenesis of endothelial cells through activation of ERK1/2 signal pathway.

Liu F1,2, Tan A1,2, Yang R1,3, Xue Y1,2, Zhang M1,2, Chen L4, Xiao L2, Yang X1,3, Yu Y5,6.

Author information

1
Key Laboratory for Regenerative Medicine (JNU-CUHK) Ministry of Education, Jinan University, Guangzhou, China.
2
Department of Developmental and Regenerative Biology, College of Life Science and Technologies, Jinan University, Guangzhou, China.
3
Division of Histology and Embryology, Medical College, Jinan University, Guangzhou, China.
4
Department of Anesthesia, The First Affiliated Hospital, Jinan University, Guangzhou, China.
5
Key Laboratory for Regenerative Medicine (JNU-CUHK) Ministry of Education, Jinan University, Guangzhou, China. yuyhong79@gmail.com.
6
Department of Developmental and Regenerative Biology, College of Life Science and Technologies, Jinan University, Guangzhou, China. yuyhong79@gmail.com.

Abstract

C1ql-like (C1QL)-1 and -4 proteins are encoded by homologous genes that are highly expressed in brain and adipose tissues. However, functional properties of C1QL proteins outside of the brain and adipocytes remain unknown. Here, we report that the globular domain of C1ql1/Ctrp14 and C1ql4/Ctrp11 proteins directly stimulate the angiogenesis of endothelial cells. In this study, soluble C1ql1/CTRP14 and C1ql4/Ctrp11 proteins, produced in prokaryote expression system, are co-cultured with human umbilical vein endothelium cells (HUVECs), which phenotype is identified with von Willebrand factor antibody. C1ql1/Ctrp14 and C1ql4/Ctrp11 promote the migration and capillary tube formation of HUVECs in a dose-dependent manner. During this process, phosphorylation of c-Raf, MEK1/2, ERK1/2, and p90RSK are activated by C1ql1/Ctrp14 and C1ql4/Ctrp11. MEK1/2 inhibitor, U0126, blocks C1ql1/Ctrp14-, and C1ql4/Ctrp11-induced capillary tube formation and cell migration. Moreover, the immunoreactivity of the receptor of C1QL1-C1QL4, brain-specific angiogenesis inhibitor 3 (BAI3), is detected in HUVECs, suggesting that BAI3 may mediate C1QL1/CTRP14- and C1QL4/CTRP11-induced angiogenesis. Meanwhile, C1ql1/Ctrp14 and C1ql4/Ctrp11 exposure also causes a stimulatory response of angiogenesis in chick yolk sac membrane. These data demonstrate that C1ql1/Ctrp14 and C1ql4/Ctrp11 stimulate the new blood vessel growth by activation of ERK1/2 signal pathway. The proangiogenic activity of C1ql1/Ctrp14 and C1ql4/Ctrp11 provides novel insights into the new opportunities for therapeutic intervention by targeting C1QLs in tumorigenesis, tissue regeneration, and recovery of ischemic heart disease.

KEYWORDS:

Angiogenesis; C1ql1/Ctrp14; C1ql4/Ctrp11; Chick yolk sac membrane; ERK1/2; HUVECs

PMID:
27734226
DOI:
10.1007/s11010-016-2842-7
[Indexed for MEDLINE]

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