ATC Abstracts

American Transplant Congress abstracts

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Articles tagged "Co-stimulation"

  • 2018 American Transplant Congress

    OX40 Costimulation Prevents Induction of Foxp3+ Tregs through Upregulation of Novel Repressors of Foxp3 Gene Expression

    X. Zhang,1 X. Xiao,1 P. Lan,1 J. Li,1 Y. Dou,1 W. Chen,1 N. Ishii,2 S. Chen,1 E. Taparowsky,3 X. Li.1,4

    1Immunobiology & Transplant Research Center, Houston Methodist Hospital, Houston, TX; 2Department of Microbiology and Immunology, Tohoku University, Sendai, Japan; 3Department of Biological Sciences, Perdue University, Lafayette, IN; 4Department of Surgery, Weill Cornell Medical College of Cornell University, New York, NY.

    Foxp3+ Tregs are essential for the induction of transplant tolerance and OX40 costimulation is known to break transplant tolerance. The exact mechanism of OX40 in…
  • 2018 American Transplant Congress

    Patients Converted to Belatacept Show Different Immunophenotyping Compared with De Novo Belatacept-Treated Patients

    M. Rial,1 F. Caro,2 A. Nella,2 D. Guerrieri,2 L. León,1 P. Uva,1 E. Chuluyan,2 D. Casadei.1

    1Instituto de Nefrología, Nephrology, Buenos Aires, Argentina; 2CEFYBO, UBA, CONICET, Buenos Aires, Argentina.

    The incidence of adverse clinical events mainly in early, but not late post-transplantation such as an increased rate of acute rejection precludes the use of…
  • 2018 American Transplant Congress

    Loss of HIF-1α in CD4 T Cell Improve Outcome of Mouse Vascularized Osteomyocutaneous Allotransplantation under Costimulation Blockade

    C-.H. Lin,1,2 M. Anggelia,1,2 H. Yang,3 W. Chuang,4 H. Cheng,1 F-.C. Wei,1,2 G. Brandacher.5

    1PRS, Center for VCA, Chang Gung Memorial Hospital, Taoyuan, Taiwan; 2Chang Gung Medical College and Chang Gung University, Taoyuan, Taiwan; 3Nephrology, Chang Gung Memorial Hospital, Taoyuan, Taiwan; 4Pathology, Chang Gung Memorial Hospital, Taoyuan, Taiwan; 5PRS, Johns Hopkins University School of Medicine, Baltimore, MD.

    Background: Allograft survival depends on the balance of effector T cells (Teff) and regulatory T cells (Tregs). Previous study suggested that the balance is controlled…
  • 2018 American Transplant Congress

    Thymic Irradiation as a Maneuver for Repertoire Exchange in Costimulatory-Blockade-Based Immunotherapy

    M. Mulvihill,1 B. Ezekian,1 Q. Gao,1 K. Samy,1 R. Davis,1 F. Leopardi,1 W. Giles,2 F-.F. Yin,2 C. Willett,2 B. Collins,1 A. Kirk.1

    1Department of Surgery, Duke University, Durham, NC; 2Department of Radiation Oncology, Duke University, Durham, NC.

    Background All successful, prospective clinical tolerance-induction strategies have employed thymic irradiation to achieve chimerism. However, evidence suggests durable chimerism is not required to attain tolerance.…
  • 2018 American Transplant Congress

    Graft Dendritic Cell p40 Homodimers Activate Donor-Reactive Endogenous Memory CD8 T Cells within Higher Risk Allografts

    H. Tsuda, A. Valujskikh, R. Fairchild.

    Immunology, Cleveland Clinic, Cleveland, OH.

    Memory T cells with donor-reactivity pose a major barrier to successful allograft transplantation and tolerance induction. Longer cold ischemic storage (CIS) prior to transplantation promotes…
  • 2018 American Transplant Congress

    p40 Homodimer Induced Proliferation of Endogenous Donor-Reactive Memory CD8 T Cells within High Risk Allografts Requires Memory CD8 T Cell Expression of CD122

    H. Tsuda, A. Valujskikh, R. Fairchild.

    Immunology, Cleveland Clinic, Cleveland, OH.

    Increasing the duration of cold ischemic storage (CIS) from 0.5 to 8 hrs prior to transplant induces the increased proliferation of endogenous donor-reactive CD4 and…
  • 2018 American Transplant Congress

    The BEST Trial: A Prospective Randomized Multicenter Trial of Belatacept-Based CNI- and Corticosteroid-Free Immunosuppression

    E. Woodle,1 D. Kaufman,2 A. Shields,1 J. Leone,3 A. Wiseman,4 A. Matas,5 P. West-Thielke,6 E. King,1 R. Alloway.1

    1U Cincinnati, Cincinnati; 2U Wisconsin, Madison; 3Tampa General, Tampa; 4U Colorado, Denver; 5U Minnesota, Minneapolis; 6UIC, Chicago.

    Previous large multicenter belatacept (BELA)-based CNI- and steroid-free immunosuppressive trials have not enrolled to completion due to safety concerns. The BEST Trial (Belatacept-based Early Steroid…
  • 2018 American Transplant Congress

    Late Conversion from Calcineurin Inhibitors to Belatacept is Associated with a Sustained Improvement in Kidney Allograft Function

    S. Sethi, J. Choi, A. Vo, R. Najjar, A. Peng, S. Jordan, E. Huang.

    Medicine/Nephrology, Cedars Sinai Medical Center, Los Angeles, CA.

    Introduction: Belatacept was shown to have longer kidney graft survival and higher eGFR at 7 years than a calcineurin inhibitor (CNI)-based regimen in the BENEFIT…
  • 2018 American Transplant Congress

    Clinical Outcomes of Conversion from Calcineurin Inhibitor to Belatacept-Based Immunosuppression in Highly Sensitized Kidney Transplant Recipients

    S. Sethi, J. Choi, A. Vo, A. Peng, K. Lim, R. Najjar, S. Jordan, E. Huang.

    Cedars Sinai Medical Center, Los Angeles.

    Introduction:Efficacy of belatacept when converted from calcineurin inhibitors (CNI) in high immunologic risk patients has not been established. We examined the impact of HLA-sensitization on…
  • 2018 American Transplant Congress

    Presence of Chronic Vascular Lesions on Allograft Biopsy is Associated with Greater Improvement in Renal Function after Conversion from Tacrolimus to Belatacept

    M. Perez-Saez,1,2 B. Yu,1 A. Uffing,1 N. Murakami,1 J. Azzi,1 S. El Haji,3 S. Gabardi,3 L. Riella.1

    1Transplantation Research Center, Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; 2Servicio de Nefrologia, Hospital del Mar, Barcelona, Spain; 3Pharmacy Services, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.

    Background: Conversion from tacrolimus to belatacept has been shown to be beneficial for an increasing number of kidney transplant (KT) patients. However, predicting factors for…
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