Calcitonin gene-related peptide promotes proliferation and inhibits apoptosis in endothelial progenitor cells via inhibiting MAPK signaling.

IF 2.1 3区生物学 Q3 BIOCHEMICAL RESEARCH METHODS Proteome Science Pub Date : 2018-11-14 eCollection Date: 2018-01-01 DOI:10.1186/s12953-018-0146-4

Jianqun Wu, Song Liu, Zhao Wang, Shenghui Ma, Huan Meng, Jijie Hu

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引用次数: 16

Abstract

Background: Calcitonin gene-related peptide (CGRP) contributes to bone formation by stimulating bone marrow stromal cell (BMSC) proliferation and differentiation. However, the proliferative and apoptotic effects of CGRP on bone marrow-derived endothelial progenitor cells (EPCs) have not been investigated.

Methods: We tested the effects of CGRP on EPC proliferation and apoptosis by Cell Counting Kit-8, flow cytometry, and studied the effects of CGRP on the expression of proliferation- and apoptosis-related markers in EPCs and the underlying mitogen-activated protein kinase (MAPK) signalling pathway by quantitative polymerase chain reaction and western blotting.

Results: We detected EPC markers (CD34, CD133 and VEGFR-2) in 7-day cultures and found that CGRP (10^- 10-10^- 12 M) promoted the proliferation of cultured EPCs, with a peak increase of 30% at 10^- 10 M CGRP. CGRP also upregulated the expression of proliferation-associated genes, including cyclin D1 and cyclin E, and increased the percentages of G2/M-phase and S-phase cells after incubation 72 h. CGRP inhibited serum deprivation (SD)-induced apoptosis in EPCs after 24 and 48 h and downregulated the expression of apoptosis-related genes, including caspase-3, caspase-8, caspase-9 and Bax. Phosphorylated (p-)ERK1/2, p-p38 and p-JNK protein levels in EPCs treated with CGRP were significantly lower than those in untreated EPCs. Pre-treatment with the calcitonin receptor-like receptor (CRLR) antagonist CGRP8-37 or a MAPK pathway inhibitor (PD98059, SB203580 or SP600125) completely or partially reversed the pro-proliferative and anti-apoptotic effects and the reduced p-ERK1/2, p-p38 and p-JNK expression induced by CGRP.

Conclusion: Our results show that CGRP exerts pro-proliferative and anti-apoptotic effects on EPCs and may act by inhibiting MAPK pathways.

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降钙素基因相关肽通过抑制MAPK信号传导促进内皮祖细胞增殖和抑制细胞凋亡。

背景:降钙素基因相关肽(CGRP)通过刺激骨髓基质细胞(BMSC)的增殖和分化参与骨形成。然而，CGRP对骨髓源性内皮祖细胞(EPCs)的增殖和凋亡作用尚未被研究。方法:采用Cell Counting Kit-8、流式细胞术检测CGRP对EPCs增殖和凋亡的影响;采用定量聚合酶链反应和western blotting检测CGRP对EPCs增殖和凋亡相关标志物表达及MAPK信号通路的影响。结果:我们在培养7天的细胞中检测了EPC标记物(CD34、CD133和VEGFR-2)，发现CGRP (10- 10-10- 12 M)促进了EPCs的增殖，在CGRP 10-10 M时，EPCs的增殖率最高可达30%。CGRP还上调增殖相关基因cyclin D1和cyclin E的表达，并在培养72 h后增加G2/ m期和s期细胞的百分比。CGRP抑制血清剥夺(SD)诱导的EPCs凋亡24和48 h，下调凋亡相关基因caspase-3、caspase-8、caspase-9和Bax的表达。CGRP处理的EPCs中磷酸化(p-)ERK1/2、p-p38和p- jnk蛋白水平显著低于未处理的EPCs。用降钙素受体样受体(CRLR)拮抗剂CGRP8-37或MAPK通路抑制剂(PD98059、SB203580或SP600125)预处理完全或部分逆转了CGRP诱导的促增殖和抗凋亡作用以及p-ERK1/2、p-p38和p-JNK表达的降低。结论:CGRP对EPCs具有促增殖和抗凋亡作用，可能通过抑制MAPK通路发挥作用。

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来源期刊

Proteome Science 生物-生化研究方法

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Proteome Science is an open access journal publishing research in the area of systems studies. Proteome Science considers manuscripts based on all aspects of functional and structural proteomics, genomics, metabolomics, systems analysis and metabiome analysis. It encourages the submissions of studies that use large-scale or systems analysis of biomolecules in a cellular, organismal and/or environmental context. Studies that describe novel biological or clinical insights as well as methods-focused studies that describe novel methods for the large-scale study of any and all biomolecules in cells and tissues, such as mass spectrometry, protein and nucleic acid microarrays, genomics, next-generation sequencing and computational algorithms and methods are all within the scope of Proteome Science, as are electron topography, structural methods, proteogenomics, chemical proteomics, stem cell proteomics, organelle proteomics, plant and microbial proteomics. In spite of its name, Proteome Science considers all aspects of large-scale and systems studies because ultimately any mechanism that results in genomic and metabolomic changes will affect or be affected by the proteome. To reflect this intrinsic relationship of biological systems, Proteome Science will consider all such articles.