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. 2018 Feb 16;122(4):591-605.
doi: 10.1161/CIRCRESAHA.117.311950. Epub 2018 Jan 3.

Yes-Associated Protein Promotes Angiogenesis via Signal Transducer and Activator of Transcription 3 in Endothelial Cells

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Yes-Associated Protein Promotes Angiogenesis via Signal Transducer and Activator of Transcription 3 in Endothelial Cells

Jinlong He et al. Circ Res. .

Erratum in

Abstract

Rationale: Angiogenesis is a complex process regulating endothelial cell (EC) functions. Emerging lines of evidence support that YAP (Yes-associated protein) plays an important role in regulating the angiogenic activity of ECs.

Objective: The objective of this study was to specify the effect of EC YAP on angiogenesis and its underlying mechanisms.

Method and results: In ECs, vascular endothelial growth factor reduced YAP phosphorylation time and dose dependently and increased its nuclear accumulation. Using Tie2Cre-mediated YAP transgenic mice, we found that YAP promoted angiogenesis in the postnatal retina and tumor tissues. Mass spectrometry revealed signal transducer and activator of transcription 3 (STAT3) as a potential binding partner of YAP in ECs. Western blot and immunoprecipitation assays indicated that binding with YAP prolonged interleukin 6-induced STAT3 nuclear accumulation by blocking chromosomal maintenance 1-mediated STAT3 nuclear export without affecting its phosphorylation. Moreover, angiopoietin-2 expression induced by STAT3 was enhanced by YAP overexpression in ECs. Finally, a selective STAT3 inhibitor or angiopoietin-2 blockage partly attenuated retinal angiogenesis in Tie2Cre-mediated YAP transgenic mice.

Conclusions: YAP binding sustained STAT3 in the nucleus to enhance the latter's transcriptional activity and promote angiogenesis via regulation of angiopoietin-2.

Keywords: STAT3 transcription factor; angiopoietin-2; endothelial cells; vascular endothelial growth factor A.

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