Antiangiogenic and immunomodulatory effects of rapamycin on islet endothelium

Relevance for islet transplantation

V. Cantaluppi, L. Biancone, G. Mauriello Romanazzi, F. Figliolini, S. Beltramo, M. S. Ninniri, F. Galimi, R. Romagnoli, A. Franchello, M. Salizzoni, P. Cavallo Perin, Camillo Ricordi, G. P. Segoloni, G. Camussi

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Donor intra-islet endothelial cells contribute to neovascularization after transplantation. Several factors may interfere with this process and ultimately influence islet engraftment. Rapamycin, a central immunosuppressant in islet transplantation, is an mTOR inhibitor that has been shown to inhibit cancer angiogenesis. The aim of this study was to evaluate the effects of rapamycin on islet endothelium. Rapamycin inhibited the outgrowth of endothelial cells from freshly purified human islets and the formation of capillary-like structures in vitro and in vivo after subcutaneous injection within Matrigel plugs into SCID mice. Rapamycin decreased migration, proliferation and angiogenic properties of human and mouse islet-derived endothelial cell lines with appearance of apoptosis. The expression of angionesis-related factors VEGF, αVβ3 integrin and thrombospondin-1 on islet endothelium was altered in the presence of rapamycin. On the other hand, rapamycin decreased the surface expression of molecules involved in immune processes such as ICAM-1 and CD40 and reduced the adhesion of T cells to islet endothelium. Our results suggest that rapamycin exerts dual effects on islet endothelium inducing a simultaneous inhibition of angiogenesis and a down-regulation of receptors involved in lymphocyte adhesion and activation.

Original languageEnglish
Pages (from-to)2601-2611
Number of pages11
JournalAmerican Journal of Transplantation
Volume6
Issue number11
DOIs
StatePublished - Nov 1 2006

Fingerprint

Islets of Langerhans Transplantation
Sirolimus
Endothelium
Endothelial Cells
Thrombospondin 1
SCID Mice
Intercellular Adhesion Molecule-1
Subcutaneous Injections
Immunosuppressive Agents
Lymphocyte Activation
Islets of Langerhans
Integrins
Vascular Endothelial Growth Factor A
Down-Regulation
Transplantation
Apoptosis
T-Lymphocytes
Cell Line

Keywords

  • Endothelial cells
  • Engraftment
  • Rapamycin

ASJC Scopus subject areas

  • Immunology

Cite this

Cantaluppi, V., Biancone, L., Romanazzi, G. M., Figliolini, F., Beltramo, S., Ninniri, M. S., ... Camussi, G. (2006). Antiangiogenic and immunomodulatory effects of rapamycin on islet endothelium: Relevance for islet transplantation. American Journal of Transplantation, 6(11), 2601-2611. https://doi.org/10.1111/j.1600-6143.2006.01534.x

Antiangiogenic and immunomodulatory effects of rapamycin on islet endothelium : Relevance for islet transplantation. / Cantaluppi, V.; Biancone, L.; Romanazzi, G. Mauriello; Figliolini, F.; Beltramo, S.; Ninniri, M. S.; Galimi, F.; Romagnoli, R.; Franchello, A.; Salizzoni, M.; Perin, P. Cavallo; Ricordi, Camillo; Segoloni, G. P.; Camussi, G.

In: American Journal of Transplantation, Vol. 6, No. 11, 01.11.2006, p. 2601-2611.

Research output: Contribution to journalArticle

Cantaluppi, V, Biancone, L, Romanazzi, GM, Figliolini, F, Beltramo, S, Ninniri, MS, Galimi, F, Romagnoli, R, Franchello, A, Salizzoni, M, Perin, PC, Ricordi, C, Segoloni, GP & Camussi, G 2006, 'Antiangiogenic and immunomodulatory effects of rapamycin on islet endothelium: Relevance for islet transplantation', American Journal of Transplantation, vol. 6, no. 11, pp. 2601-2611. https://doi.org/10.1111/j.1600-6143.2006.01534.x
Cantaluppi, V. ; Biancone, L. ; Romanazzi, G. Mauriello ; Figliolini, F. ; Beltramo, S. ; Ninniri, M. S. ; Galimi, F. ; Romagnoli, R. ; Franchello, A. ; Salizzoni, M. ; Perin, P. Cavallo ; Ricordi, Camillo ; Segoloni, G. P. ; Camussi, G. / Antiangiogenic and immunomodulatory effects of rapamycin on islet endothelium : Relevance for islet transplantation. In: American Journal of Transplantation. 2006 ; Vol. 6, No. 11. pp. 2601-2611.
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