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Angiogenesis

, Volume 15, Issue 4, pp 671–683 | Cite as

Folic acid inhibits endothelial cell proliferation through activating the cSrc/ERK 2/NF-κB/p53 pathway mediated by folic acid receptor

  • Shyr-Yi Lin
  • Woan-Ruoh Lee
  • Yi-Fan Su
  • Sung-Po Hsu
  • Hsu-Chen Lin
  • Pei-Yin Ho
  • Tien-Chi Hou
  • Yu-Pei Chou
  • Chun-Ting Kuo
  • Wen-Sen Lee
Original Paper

Abstract

Folate is important for normal cell division. Folate deficiency has been implicated in various diseases, including atherosclerosis, neural tube defects, and cancer. However, the effect of folate on angiogenesis was unclear. The aim of this study was to investigate the anti-angiogenic action of folic acid (FA). FA (0–10 μmol/L) concentration-dependently decreased DNA synthesis and proliferation in cultured human umbilical venous endothelial cells (HUVEC). Western blot analyses demonstrated that the levels of p21, p27 and p53 protein in HUVEC were increased by FA. The FA-inhibited [3H]thymidine incorporation was completely blocked when the expressions of p21 and p27 were knocked-down together. Knock-down of p53 prevented the FA-induced increases in p21 and p27 protein level. The levels of phosphorylated Src (p-Src) and p-Src-FA receptor (FR) complex in HUVEC were increased by FA. Knock-down of FR reduced the FA-induced increases of p-Src and p53. The FA-induced increases of p21, p27 and p53 protein levels were abolished when cSrc was knocked-down. FA also increased NF-κB nuclear translocation and binding onto the p53 promoter. The FA-induced up-regulation of the p53 promoter activity was prevented by knocked-down of ERK. Matrigel angiogenesis assay in mice demonstrate the anti-angiogenic effect of FA in vivo. In conclusion, our data indicate that FA bound to FR in HUVEC, subsequently activated the cSrc/ERK 2/NF-κB/p53 signaling pathway, which in turn up-regulated the expression of p21 and p27, and finally resulted in cell cycle arrest at the G0/G1 phase. In the present study, we uncover a completely novel role of FA for anti-angiogenesis.

Keywords

Angiogenesis Endothelium Folic acid receptor Cell proliferation Signaling pathway 

Notes

Acknowledgments

This work was supported by research grants from NSC96-2320-B-038-023, NSC 97-2320-B-038 -033 -MY3, 98TMU-SHH-03-3, and 99TMU-SHH-02-1 to Dr. Lee; NSC-96-2317-B-038-001 to Dr. Lin.

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Shyr-Yi Lin
    • 1
    • 2
  • Woan-Ruoh Lee
    • 3
    • 4
    • 5
  • Yi-Fan Su
    • 6
  • Sung-Po Hsu
    • 5
  • Hsu-Chen Lin
    • 7
  • Pei-Yin Ho
    • 6
  • Tien-Chi Hou
    • 8
  • Yu-Pei Chou
    • 5
  • Chun-Ting Kuo
    • 5
  • Wen-Sen Lee
    • 5
    • 9
    • 10
  1. 1.Department of Primary Care MedicineTaipei Medical University HospitalTaipeiTaiwan
  2. 2.Department of General Medicine, School of Medicine, Medical CollegeTaipei Medical UniversityTaipeiTaiwan
  3. 3.Department of Dermatology, School of Medicine, Medical CollegeTaipei Medical UniversityTaipeiTaiwan
  4. 4.Department of DermatologyTaipei Medical University-Shuang Ho HospitalTaipeiTaiwan
  5. 5.Graduate Institute of Medical Sciences, School of Medicine, Medical CollegeTaipei Medical UniversityTaipeiTaiwan
  6. 6.Graduate Institute of Cellular and Molecular Biology, School of Medicine, Medical CollegeTaipei Medical UniversityTaipeiTaiwan
  7. 7.Graduate Institute of Physiology, College of MedicineNational Taiwan UniversityTaipeiTaiwan
  8. 8.Department of Medicine, School of Medicine, Medical CollegeTaipei Medical UniversityTaipeiTaiwan
  9. 9.Department of Physiology, School of Medicine, Medical CollegeTaipei Medical UniversityTaipeiTaiwan
  10. 10.Cancer Research CenterTaipei Medical University HospitalTaipeiTaiwan

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