Abstract
A homogeneous polysaccharide named as LJW2F2 was extracted and purified from the flowers of Lonicera japonica Thunb. Structural characteristic indicated that LJW2F2 was a homogalacturonan composed of α-1,4-D-galacturonic acid with a molecular weight of 7.2 kDa. Previous investigation suggested that homogalacturonan might impede angiogenesis, however the mechanism is still vague. Here we reported that LJW2F2 significantly disrupted capillary-like tube formation of human microvascular endothelia cells (HMEC-1) on matrigel as well as the cells migration. Mechanism study revealed that LJW2F2 might inactivate phosphorylation of epidermal growth factor receptor (EGFR), subsequently suppress Raf, mitogen-activated protein kinase (MEK) and extracellular-related kinase (ERK) phosphorylation. Moreover, LJW2F2 markedly decreased the expression of Notch1 and Delta-like ligand 4 (Dll4). Therefore, our results suggested that LJW2F2 might be a potential angiogenesis inhibitor via disturbing multiple signaling pathways.
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All data generated or analyzed involved in this study are included in the present manuscript.
Abbreviations
- HMEC-1:
-
human microvascular endothelial cells
- DMSO:
-
dimethyl sulfoxide
- GC:
-
gas chromatography
- HPGPC:
-
high performance gel permeation chromatography
- NMR:
-
nuclear magnetic resonance
- cDNA:
-
complementary DNA
- EGF:
-
epidermal growth factor
- HRP:
-
horseradish peroxidase
- RT-PCR:
-
reverse transcription-PCR
- ERK:
-
extracellular signal-regulated kinase
- VEGF:
-
vascular endothelial growth factor
- Dll4:
-
Delta-like 4
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Funding
This work was supported by National Key R&D Program of China (2019YFC1711000), Shanghai Municipal Science and Technology Major Project, National Natural Science Foundation of China (31870801), Kan Ding.
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WL conducted all the biological experiment and drafted the manuscript; KD designed the experiments and revised the manuscript; PW supervised the research and reviewed the manuscript; XH performed the extraction and purification of polysaccharide; ZD carried out the statistical analyses.
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Highlights
• The structure of a novel polysaccharide from Lonicera japonica is elucidated.
• The polysaccharide is a homogalacturan composing of α-1,4-D-galacturonic acid.
• The polysaccharide might inhibit HMEC-1 cells tube formation and migration.
• The polysaccharide could disrupt EGFR/Raf/MEK/ERK and Dll4-Notch1 signaling axis.
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Liao, W., Hu, X., Du, Z. et al. A homogalacturonan from Lonicera japonica Thunb. disrupts angiogenesis via epidermal growth factor receptor and Delta-like 4 associated signaling. Glycoconj J 39, 725–735 (2022). https://doi.org/10.1007/s10719-022-10088-2
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DOI: https://doi.org/10.1007/s10719-022-10088-2