Engineered endothelial progenitor cells that overexpress prostacyclin protect vascular cells

Qi Liu, Yutao Xi, Toya Terry, Shui Ping So, Anita Mohite, Jia Zhang, Geru Wu, Xiaobing Liu, Jie Cheng, Ke He Ruan, James T. Willerson, Richard A.F. Dixon

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Prostacyclin (PGI2) is a potent vasodilator and important mediator of vascular homeostasis; however, its clinical use is limited because of its short (<2-min) half-life. Thus, we hypothesize that the use of engineered endothelial progenitor cells (EPCs) that constitutively secrete high levels of PGI2 may overcome this limitation of PGI2 therapy. A cDNA encoding COX-1-10aa-PGIS, which links human cyclooxygenase-1 (COX-1) to prostacyclin synthase (PGIS), was delivered via nucleofection into outgrowth EPCs derived from rat bone marrow mononuclear cells. PGI2-secreting strains (PGI2-EPCs) were established by continuous subculturing of transfected cells under G418 selection. Genomic PCR, RT-PCR, and Western blot analyses confirmed the overexpression of COX-1-10aa-PGIS in PGI2-EPCs. PGI2-EPCs secreted significantly higher levels of PGI2 in vitro than native EPCs (P<0.05) and showed higher intrinsic angiogenic capability; conditioned medium (CM) from PGI2-EPCs promoted better tube formation than CM from native EPCs (P<0.05). Cell- and paracrine-mediated in vitro angiogenesis was attenuated when COX-1-10aa-PGIS protein expression was knocked down. Whole-cell patch-clamp studies showed that 4-aminopyridine-sensitive K + current density was increased significantly in rat smooth muscle cells (rSMCs) cocultured under hypoxia with PGI2-EPCs (7.50±1.59pA/pF; P<0.05) compared with rSMCs cocultured with native EPCs (3.99±1.26pA/pF). In conclusion, we successfully created EPC strains that overexpress an active novel enzyme resulting in consistent secretion of PGI2. PGI2-EPCs showed enhanced intrinsic proangiogenic properties and provided favorable paracrine-mediated cellular protections, including promoting in vitro angiogenesis of native EPCs and hyperpolarization of SMCs under hypoxia.

Original languageEnglish (US)
Pages (from-to)2907-2916
Number of pages10
JournalJournal of Cellular Physiology
Volume227
Issue number7
DOIs
StatePublished - Jul 1 2012
Externally publishedYes

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Endothelial cells
Epoprostenol
Blood Vessels
Cyclooxygenase 1
Rats
Conditioned Culture Medium
Endothelial Progenitor Cells
Smooth Muscle Myocytes
Muscle
Polymerase Chain Reaction
4-Aminopyridine
Clamping devices
Vasodilator Agents
Bone Marrow Cells
Half-Life
Bone
Homeostasis
Current density
Complementary DNA
Western Blotting

ASJC Scopus subject areas

  • Physiology
  • Clinical Biochemistry
  • Cell Biology

Cite this

Liu, Q., Xi, Y., Terry, T., So, S. P., Mohite, A., Zhang, J., ... Dixon, R. A. F. (2012). Engineered endothelial progenitor cells that overexpress prostacyclin protect vascular cells. Journal of Cellular Physiology, 227(7), 2907-2916. https://doi.org/10.1002/jcp.23035

Engineered endothelial progenitor cells that overexpress prostacyclin protect vascular cells. / Liu, Qi; Xi, Yutao; Terry, Toya; So, Shui Ping; Mohite, Anita; Zhang, Jia; Wu, Geru; Liu, Xiaobing; Cheng, Jie; Ruan, Ke He; Willerson, James T.; Dixon, Richard A.F.

In: Journal of Cellular Physiology, Vol. 227, No. 7, 01.07.2012, p. 2907-2916.

Research output: Contribution to journalArticle

Liu, Q, Xi, Y, Terry, T, So, SP, Mohite, A, Zhang, J, Wu, G, Liu, X, Cheng, J, Ruan, KH, Willerson, JT & Dixon, RAF 2012, 'Engineered endothelial progenitor cells that overexpress prostacyclin protect vascular cells', Journal of Cellular Physiology, vol. 227, no. 7, pp. 2907-2916. https://doi.org/10.1002/jcp.23035
Liu, Qi ; Xi, Yutao ; Terry, Toya ; So, Shui Ping ; Mohite, Anita ; Zhang, Jia ; Wu, Geru ; Liu, Xiaobing ; Cheng, Jie ; Ruan, Ke He ; Willerson, James T. ; Dixon, Richard A.F. / Engineered endothelial progenitor cells that overexpress prostacyclin protect vascular cells. In: Journal of Cellular Physiology. 2012 ; Vol. 227, No. 7. pp. 2907-2916.
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AU - Wu, Geru

AU - Liu, Xiaobing

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