Effects of serum starvation and vascular endothelial growth factor stimulation on the expression of Notch signalling pathway components

Author:

Li Liming1ORCID,Liu Xiaqing1,Zhao Mingguang2,Guo Peng1ORCID,Zhang Haifeng2

Affiliation:

1. Institute of Biotechnology, College of Life and Health Sciences, Northeastern University, Shenyang, China

2. Department of Neurosurgery, General Hospital of Northern Theater Command, Shenyang, China

Abstract

Brain arteriovenous malformation (BAVM) is an abnormality in the cerebral vascular system. Although the upregulation of the Notch signalling pathway is a deterministic factor in BAVM, the mechanism by which this pathway is upregulated in patients with BAVM is uncertain. The effects of serum starvation and vascular endothelial growth factor (VEGF) stimulation on the Notch signalling pathway in brain microvascular endothelial cells (MECs) and mouse embryonic stem (mES)/embryoid body (EB)-derived endothelial cells were investigated in this study. The duration of serum starvation and VEGF concentration were changed, cell viability was measured, and reasonable time and concentration gradients were selected for subsequent studies. Protein and mRNA expression levels of Notch signalling pathway components in both MECs and mES/EB-derived endothelial cells were detected using western blotting and real-time PCR, respectively. Expression levels of the Notch1, Notch4, Jagged1, delta-like ligand 4 (Dll4) and Hes1 proteins and mRNAs were upregulated by lower VEGF concentrations and shorter-term serum starvation but inhibited by higher VEGF concentrations and longer-term serum starvation. This study revealed effects of changes in the duration of serum starvation and VEGF concentration on the expression of Notch signalling pathway components in both MECs and mES/EB-derived endothelial cells, potentially contributing to BAVM formation.

Funder

fundamental research funds for the central universities

National Natural Science Foundation of China

Publisher

SAGE Publications

Subject

Multidisciplinary

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