Liposomes as a Putative Tool to Investigate NAADP Signaling in Vasculogenesis

Francesca Di Nezza, Estella Zuccolo, Valentina Poletto, Vittorio Rosti, Antonio De Luca, Francesco Moccia, Germano Guerra, Luigi Ambrosone

Research output: Contribution to journalArticlepeer-review

Abstract

Nicotinic acid adenine dinucleotide phosphate (NAADP) is the newest discovered intracellular second messengers, which is able to release Ca2+ stored within endolysosomal (EL) vesicles. NAADP-induced Ca2+ signals mediate a growing number of cellular functions, ranging from proliferation to muscle contraction and differentiation. Recently, NAADP has recently been shown to regulate angiogenesis by promoting endothelial cell growth. It is, however, still unknown whether NAADP stimulates proliferation also in endothelial progenitor cells, which are mobilized in circulation after an ischemic insult to induce tissue revascularization. Herein, we described a novel approach to prepare NAADP-containing liposomes, which are highly cell membrane permeable and are therefore amenable for stimulating cell activity. Accordingly, NAADP-containing liposomes evoked an increase in intracellular Ca2+ concentration, which was inhibited by NED-19, a selective inhibitor of NAADP-induced Ca2+ release. Furthermore, NAADP-containing liposomes promoted EPC proliferation, a process which was inhibited by NED-19 and BAPTA, a membrane permeable intracellular Ca2+ buffer. Therefore, NAADP-containing liposomes stand out as a promising tool to promote revascularization of hypoxic/ischemic tissues by favoring EPC proliferation. J. Cell. Biochem. 118: 3722–3729, 2017.

Original languageEnglish
Pages (from-to)3722-3729
Number of pages8
JournalJournal of Cellular Biochemistry
Volume118
Issue number11
DOIs
Publication statusPublished - Nov 1 2017

Keywords

  • Ca SIGNALING
  • ENDOTHELIAL PROGENITOR CELLS
  • LIPOSOMES
  • NAADP
  • VASCULOGENESIS

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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