Articles tagged "Inflammation"

2022 American Transplant Congress
Ikaros-SIRT1 Signaling Axis Regulates Macrophage Pyroptosis and Ischemia-Reperfusion Injury (IRI) in Mouse and Human Liver Transplantation
K. Kadono¹, H. Hirao¹, H. Kojima¹, K. J. Dery¹, X. Li², J. Kupiec-Weglinski¹
¹UCLA Medical Center, Los Angeles, CA, ²NIEHS, Durham, NC
*Purpose: Although Ikaros is a well-established regulator of lymphopoiesis, its role in myeloid cells and organ IRI remains unclear. We recently reported that the SIRT1-mediated…
2022 American Transplant Congress
P2X7R Signaling Controls Exosome Release by Macrophages and Donor MHC Cross-Dressing After Skin Transplantation
H. H. Lancia¹, N. Carnel², A. G. Lellouch¹, C. Cetrulo¹, G. Benichou²
¹Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA, ²Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA
*Purpose: Exosomes released by transplanted organs play an important role in the host's immune response leading to their rejection. Donor exosomes contribute to alloimmunity by…
2022 American Transplant Congress
Bcl6 Regulates NFκB-Controlled Endothelial Inflammation and Apoptosis
A. Franco Acevedo, N. Valenzuela
Pathology and Laboratory Medicine, UCLA, Los Angeles, CA
*Purpose: Endothelial cells (EC) centrally regulate leukocyte access to peripheral tissue and immune cell activation, and exhibit remarkable tissue-specific diversity. However, the molecular mechanisms underlying…
2022 American Transplant Congress
Disulfide HMGB1 Reprograms Macrophages to Induce Alloimmunity via TLR4 and TLR9 Pathways Following Ischemia-Reperfusion Injury in Human Orthotopic Liver Transplantation
A. Q. Terry¹, R. A. Sosa¹, F. Kaldas², R. Busuttil³, D. Gjertson¹, J. Kupiec-Weglinski¹, E. Reed¹
¹Pathology and Laboratory Medicine, University of California, Los Angeles, Los Angeles, CA, ²University of California Los Angeles (Multi-organ), Los Angeles, CA, ³Surgery, University of California, Los Angeles, Los Angeles, CA
*Purpose: Human hepatocellular damage caused by ischemia reperfusion injury (IRI) generates the disulfide form of HMGB1 (diS HMGB1), eliciting myeloid cell activation and proinflammatory cytokine…
2022 American Transplant Congress
IL-15 Signaling is Required for the Maintenance of Tissue Resident Memory T Cells in Chronic Allograft Rejection
R. Tieu¹, Q. Zeng¹, D. Zhao¹, A. Williams¹, J. Yun Tso², F. Lakkis¹, J. Yun Tso²
¹Starzl Transplantation Institute, Pittsburgh, PA, ²JN Biosciences, Mountain View, CA
*Purpose: Currently, no immunotherapies have been clinically proven to prevent or treat chronic rejection. IL-15 is known to support memory T cell homeostasis. However, it…
2022 American Transplant Congress
Higher Proinflammatory Cytokines Are Associated with Increased Antibody Titer After a Third Dose of SARS-CoV-2 Vaccine in Solid Organ Transplant Recipients
A. H. Karaba¹, X. Zhu¹, S. E. Benner¹, O. Akinde¹, Y. Eby¹, K. H. Wang¹, S. Saraf², J. M. Garonzik-Wang³, S. L. Klein¹, J. R. Bailey¹, A. L. Cox¹, J. N. Blankson¹, C. M. Durand¹, D. L. Segev¹, W. A. Werbel¹, A. A. Tobian¹
¹Johns Hopkins University, Baltimore, MD, ²National Institute of Allergy and Infectious Diseases, Bethesda, MD, ³University of Wisconsin School of Medicine and Health, Madison, WI
*Purpose: Solid organ transplant recipients (SOTRs) are at increased risk for severe COVID-19 and exhibit lower antibody responses to SARS-CoV-2 vaccines. This study aimed to…
2022 American Transplant Congress
Donor Kidney-Resident Passenger Macrophages Promote CCL8-CCR8 Mediated Early Allograft Inflammation
A. Dangi¹, I. Husain², N. Natesh³, X. Shen³, J. Kwun⁴, X. Luo⁵
¹Medicine, Duke University Medical Center, Durham, NC, ²Duke University Medical Center, Durham, NC, ³Biomedical Engineering, Duke University, Durham, NC, ⁴Duke Transplant Center, Durham, NC, ⁵Duke University School of Medicine, Durham, NC
*Purpose: Early intragraft infiltration of monocytes and macrophages has been associated with acute and chronic allograft rejections. Nevertheless, underlying mechanism remained poorly understood. In the…
2022 American Transplant Congress
Analysis of Tissue and Effluent Damage Associated Molecular Patterns Following Hypothermic Oxygenated Machine Perfusion vs Static Cold Storage in Liver Transplantation
G. G. Panayotova, Y. Qin, S. Simonishvili, T. Ayorinde, F. Paterno, L. Brown, A. Amin, K. E. Lunsford, J. V. Guarrera
Transplant Surgery, Rutgers New Jersey Medical School, Newark, NJ
*Purpose: Hypothermic Oxygenated Machine Perfusion (HMP-O2) results in decreased ischemia/reperfusion injury (IRI) after liver transplantation; however, the molecular pathways of protection are largely unexplored. In…
2022 American Transplant Congress
Wide Spectrum of Molecular Injury Highlights Heterogeneity of Banff Tubulitis and Interstitial Inflammation Lesions
M. J. Ellis¹, T. Maw², E. Huang³, E. Stites⁴, F. Shihab⁵, D. C. Brennan⁶, G. Shekhtman⁷, N. Agrawal⁷, J. Zeng⁷, S. Kung⁸
¹Duke University, Durham, NC, ²University of Southern California, Los Angeles, CA, ³Cedars-Sinai Medical Center, Los Angeles, CA, ⁴University of Colorado, Aurora, CO, ⁵University of Utah, Salt Lake City, UT, ⁶Johns Hopkins School of Medicine, Baltimore, MD, ⁷CareDx, Brisbane, CA, ⁸University of California, San Francisco, San Francisco, CA
*Purpose: The pathological definition and clinical significance of borderline T cell-mediated rejection (BL-TCMR) remains an area of active debate, leading to inconsistencies in therapeutic strategy.…
2022 American Transplant Congress
Axl and MerTK Regulate the Activation of Liver Ischemia Reperfusion Injury by Upregulating Il-13 in Kupffer Cells
J. Zhang¹, M. Ni¹, H. Zhang¹, R. Busuttil¹, J. Kupiec-Weglinski¹, X. Wang², J. Jin³, Y. Zhai¹
¹Dumont-UCLA Transplant Center, Los Angeles, CA, ²The First Affiliated Hospital of Nanjing Medical University, Nanjing, China, ³Guilin Medical University, Guilin, China
*Purpose: Ischemia reperfusion injury (IRI) remains an unresolved clinical problem. A sterile inflammatory response drives the disease pathogenesis. Although mechanisms of liver innate immune activation…