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O'Neill NA, Zhang T, Braileanu G, et al. Pilot Study of Delayed ICOS/ICOS-L Blockade With αCD40 to Modulate Pathogenic Alloimmunity in a Primate Cardiac Allograft Model. Transplant Direct. 2018;4(2):e344doi: 10.1097/TXD.0000000000000761.
O'Neill, N. A., Zhang, T., Braileanu, G., Cheng, X., Hershfeld, A., Sun, W., Reimann, K. A., Dahi, S., Kubicki, N., Hassanein, W., Laird, C., Cimeno, A., Azimzadeh, A. M., & Pierson, R. N. (2018). Pilot Study of Delayed ICOS/ICOS-L Blockade With αCD40 to Modulate Pathogenic Alloimmunity in a Primate Cardiac Allograft Model. Transplantation direct, 4(2), e344. https://doi.org/10.1097/TXD.0000000000000761
O'Neill, Natalie A, et al. "Pilot Study of Delayed ICOS/ICOS-L Blockade With αCD40 to Modulate Pathogenic Alloimmunity in a Primate Cardiac Allograft Model." Transplantation direct vol. 4,2 (2018): e344. doi: https://doi.org/10.1097/TXD.0000000000000761
O'Neill NA, Zhang T, Braileanu G, Cheng X, Hershfeld A, Sun W, Reimann KA, Dahi S, Kubicki N, Hassanein W, Laird C, Cimeno A, Azimzadeh AM, Pierson RN. Pilot Study of Delayed ICOS/ICOS-L Blockade With αCD40 to Modulate Pathogenic Alloimmunity in a Primate Cardiac Allograft Model. Transplant Direct. 2018 Feb 02;4(2):e344. doi: 10.1097/TXD.0000000000000761. eCollection 2018 Feb. PMID: 29464205; PMCID: PMC5811273.
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Transplant Direct. 2018 Feb 02;4(2):e344. doi: 10.1097/TXD.0000000000000761. eCollection 2018 Feb.

Pilot Study of Delayed ICOS/ICOS-L Blockade With αCD40 to Modulate Pathogenic Alloimmunity in a Primate Cardiac Allograft Model.

Transplantation direct

Natalie A O'Neill, Tianshu Zhang, Gheorghe Braileanu, Xiangfei Cheng, Alena Hershfeld, Wenji Sun, Keith A Reimann, Sia Dahi, Natalia Kubicki, Wessam Hassanein, Christopher Laird, Arielle Cimeno, Agnes M Azimzadeh, Richard N Pierson

Affiliations

  1. Department of Surgery, University of Maryland School of Medicine, Baltimore, MD.
  2. MassBiologics, University of Massachusetts Medical School, Boston, MA.

PMID: 29464205 PMCID: PMC5811273 DOI: 10.1097/TXD.0000000000000761

Abstract

BACKGROUND: Inducible costimulator (ICOS) is rapidly upregulated with T-cell stimulation and may represent an escape pathway for T-cell costimulation in the setting of CD40/CD154 costimulation blockade. Induction treatment exhibited no efficacy in a primate renal allograft model, but rodent transplant models suggest that the addition of delayed ICOS/ICOS-L blockade may prolong allograft survival and prevent chronic rejection. Here, we ask whether ICOS-Ig treatment, timed to anticipate ICOS upregulation, prolongs NHP cardiac allograft survival or attenuates pathogenic alloimmunity.

METHODS: Cynomolgus monkey heterotopic cardiac allograft recipients were treated with αCD40 (2C10R4, d0-90) either alone or with the addition of delayed ICOS-Ig (d63-110).

RESULTS: Median allograft survival was similar between ICOS-Ig + αCD40 (120 days, 120-125 days) and αCD40 (124 days, 89-178 days) treated animals, and delayed ICOS-Ig treatment did not prevent allograft rejection in animals with complete CD40 receptor coverage. Although CD4

CONCLUSIONS: Delayed ICOS-Ig treatment with the reagent tested is probably ineffective in modulating pathogenic primate alloimmunity in this model.

Conflict of interest statement

The authors declare no conflicts of interest.

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