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A pilot trial targeting the ICOS-ICOS-L pathway in nonhuman primate kidney transplantation.

Publication ,  Journal Article
Lo, DJ; Anderson, DJ; Song, M; Leopardi, F; Farris, AB; Strobert, E; Chapin, S; Devens, B; Karrer, E; Kirk, AD
Published in: Am J Transplant
April 2015

Costimulation blockade with the B7-CD28 pathway-specific agent belatacept is now used in clinical kidney transplantation, but its efficacy remains imperfect. Numerous alternate costimulatory pathways have been proposed as targets to synergize with belatacept, one of which being the inducible costimulator (ICOS)-ICOS ligand (ICOS-L) pathway. Combined ICOS-ICOS-L and CD28-B7 blockade has been shown to prevent rejection in mice, but has not been studied in primates. We therefore tested a novel ICOS-Ig human Fc-fusion protein in a nonhuman primate (NHP) kidney transplant model alone and in combination with belatacept. ICOS-Ig did not prolong rejection-free survival as a monotherapy or in combination with belatacept. In ICOS-Ig alone treated animals, most graft-infiltrating CD4(+) and CD8(+) T cells expressed ICOS, and ICOS(+) T cells were present in peripheral blood to a lesser degree. Adding belatacept reduced the proportion of graft-infiltrating ICOS(+) T cells and virtually eliminated their presence in peripheral blood. Graft-infiltrating T cells in belatacept-resistant rejection were primarily CD8(+) CD28(-) , but importantly, very few CD8(+) CD28(-) T cells expressed ICOS. We conclude that ICOS-Ig, alone or combined with belatacept, does not prolong renal allograft survival in NHPs. This may relate to selective loss of ICOS with CD28 loss.

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Published In

Am J Transplant

DOI

EISSN

1600-6143

Publication Date

April 2015

Volume

15

Issue

4

Start / End Page

984 / 992

Location

United States

Related Subject Headings

  • T-Lymphocytes
  • Surgery
  • Pilot Projects
  • Macaca mulatta
  • Kidney Transplantation
  • Inducible T-Cell Co-Stimulator Protein
  • Immunophenotyping
  • Immunologic Memory
  • Graft Rejection
  • Animals
 

Citation

APA
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ICMJE
MLA
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Lo, D. J., Anderson, D. J., Song, M., Leopardi, F., Farris, A. B., Strobert, E., … Kirk, A. D. (2015). A pilot trial targeting the ICOS-ICOS-L pathway in nonhuman primate kidney transplantation. Am J Transplant, 15(4), 984–992. https://doi.org/10.1111/ajt.13100
Lo, D. J., D. J. Anderson, M. Song, F. Leopardi, A. B. Farris, E. Strobert, S. Chapin, B. Devens, E. Karrer, and A. D. Kirk. “A pilot trial targeting the ICOS-ICOS-L pathway in nonhuman primate kidney transplantation.Am J Transplant 15, no. 4 (April 2015): 984–92. https://doi.org/10.1111/ajt.13100.
Lo DJ, Anderson DJ, Song M, Leopardi F, Farris AB, Strobert E, et al. A pilot trial targeting the ICOS-ICOS-L pathway in nonhuman primate kidney transplantation. Am J Transplant. 2015 Apr;15(4):984–92.
Lo, D. J., et al. “A pilot trial targeting the ICOS-ICOS-L pathway in nonhuman primate kidney transplantation.Am J Transplant, vol. 15, no. 4, Apr. 2015, pp. 984–92. Pubmed, doi:10.1111/ajt.13100.
Lo DJ, Anderson DJ, Song M, Leopardi F, Farris AB, Strobert E, Chapin S, Devens B, Karrer E, Kirk AD. A pilot trial targeting the ICOS-ICOS-L pathway in nonhuman primate kidney transplantation. Am J Transplant. 2015 Apr;15(4):984–992.
Journal cover image

Published In

Am J Transplant

DOI

EISSN

1600-6143

Publication Date

April 2015

Volume

15

Issue

4

Start / End Page

984 / 992

Location

United States

Related Subject Headings

  • T-Lymphocytes
  • Surgery
  • Pilot Projects
  • Macaca mulatta
  • Kidney Transplantation
  • Inducible T-Cell Co-Stimulator Protein
  • Immunophenotyping
  • Immunologic Memory
  • Graft Rejection
  • Animals