Differential expression of stromal cell-derived factor 1 in human brain microvascular endothelial cells and pericytes involves histone modifications

Jungwon Seo; Yong Ou Kim; Inho Jo

doi:10.1016/j.bbrc.2009.03.049

Differential expression of stromal cell-derived factor 1 in human brain microvascular endothelial cells and pericytes involves histone modifications

Jungwon Seo, Yong Ou Kim, Inho Jo

Department of Molecular Medicine

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Stromal cell-derived factor 1 (SDF-1) regulates neovascularization, which is coordinately controlled by endothelial cells (EC) and their surrounding cells, pericytes or smooth muscle cells. In the basal state, SDF-1 expression is much lower in EC than in their surrounding cells. In this study, we evaluated epigenetic regulation to determine if it is involved in the mechanism responsible for the differential expression of SDF-1 in two types of vascular cells, brain microvascular EC (HBMEC) and pericytes (HBMP). We found that HBMEC did not express SDF-1, but that HBMP did. Furthermore, treatment of EC with 5-aza-2′-dexoycytidine and trichostatin A resulted in a remarkable restoration of SDF-1 expression. Additionally, bisulfite-sequencing analysis revealed no differences in the methylation state of SDF-1 promoter between HBMEC and HBMP. Finally, a chromatin immunoprecipitation assay revealed reduced levels of histone H3 lysine 9 (H3K9) acetylation and H3K4 trimethylation with concomitant enhancement of H3K9 trimethylation in HBMEC relative to HBMP, which suggests that histone modifications are involved in the cell-specific expression of SDF-1.

Original language	English
Pages (from-to)	519-524
Number of pages	6
Journal	Biochemical and Biophysical Research Communications
Volume	382
Issue number	3
DOIs	https://doi.org/10.1016/j.bbrc.2009.03.049
State	Published - 8 May 2009

Bibliographical note

Funding Information:
This work was supported in part by the Korean Food and Drug Administration grant (08512KFDA418) and the Korea National Institute of Health intramural research grant (348-6111-213-000-207).

Keywords

DNA methylation
Endothelial cells
Epigenetic
Histone modifications
Pericytes
Stromal cell-derived factor 1

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title = "Differential expression of stromal cell-derived factor 1 in human brain microvascular endothelial cells and pericytes involves histone modifications",

abstract = "Stromal cell-derived factor 1 (SDF-1) regulates neovascularization, which is coordinately controlled by endothelial cells (EC) and their surrounding cells, pericytes or smooth muscle cells. In the basal state, SDF-1 expression is much lower in EC than in their surrounding cells. In this study, we evaluated epigenetic regulation to determine if it is involved in the mechanism responsible for the differential expression of SDF-1 in two types of vascular cells, brain microvascular EC (HBMEC) and pericytes (HBMP). We found that HBMEC did not express SDF-1, but that HBMP did. Furthermore, treatment of EC with 5-aza-2′-dexoycytidine and trichostatin A resulted in a remarkable restoration of SDF-1 expression. Additionally, bisulfite-sequencing analysis revealed no differences in the methylation state of SDF-1 promoter between HBMEC and HBMP. Finally, a chromatin immunoprecipitation assay revealed reduced levels of histone H3 lysine 9 (H3K9) acetylation and H3K4 trimethylation with concomitant enhancement of H3K9 trimethylation in HBMEC relative to HBMP, which suggests that histone modifications are involved in the cell-specific expression of SDF-1.",

keywords = "DNA methylation, Endothelial cells, Epigenetic, Histone modifications, Pericytes, Stromal cell-derived factor 1",

author = "Jungwon Seo and Kim, {Yong Ou} and Inho Jo",

note = "Funding Information: This work was supported in part by the Korean Food and Drug Administration grant (08512KFDA418) and the Korea National Institute of Health intramural research grant (348-6111-213-000-207).",

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AU - Jo, Inho

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AB - Stromal cell-derived factor 1 (SDF-1) regulates neovascularization, which is coordinately controlled by endothelial cells (EC) and their surrounding cells, pericytes or smooth muscle cells. In the basal state, SDF-1 expression is much lower in EC than in their surrounding cells. In this study, we evaluated epigenetic regulation to determine if it is involved in the mechanism responsible for the differential expression of SDF-1 in two types of vascular cells, brain microvascular EC (HBMEC) and pericytes (HBMP). We found that HBMEC did not express SDF-1, but that HBMP did. Furthermore, treatment of EC with 5-aza-2′-dexoycytidine and trichostatin A resulted in a remarkable restoration of SDF-1 expression. Additionally, bisulfite-sequencing analysis revealed no differences in the methylation state of SDF-1 promoter between HBMEC and HBMP. Finally, a chromatin immunoprecipitation assay revealed reduced levels of histone H3 lysine 9 (H3K9) acetylation and H3K4 trimethylation with concomitant enhancement of H3K9 trimethylation in HBMEC relative to HBMP, which suggests that histone modifications are involved in the cell-specific expression of SDF-1.

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Differential expression of stromal cell-derived factor 1 in human brain microvascular endothelial cells and pericytes involves histone modifications

Abstract

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Keywords

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