Articles tagged "Biopsy"

2022 American Transplant Congress
Leveraging Single-Cell Signatures in Kidney Transplant Biopsies Uncovers Immunological Heterogeneity Within Rejection Phenotypes
J. Callemeyn¹, B. Lamarthée¹, P. Koshy², T. Debyser³, E. Van Loon¹, A. Franken⁴, T. Van Brussel⁴, I. Arijs⁴, D. Lambrechts⁴, M. Rabant⁵, A. Senev¹, T. Vaulet⁶, C. Tinel¹, M. Naesens¹
¹Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium, ²Department of Morphology and Molecular Pathology, University Hospitals Leuven, Leuven, Belgium, ³Faculty of Medicine, KU Leuven, Leuven, Belgium, ⁴Laboratory for Translational Genetics, Department of Human Genetics, KU Leuven, Leuven, Belgium, ⁵Necker-Enfants Malades Institute, Institut national de la santé et de la recherche médicale (Inserm), Université de Paris, Paris, France, ⁶ESAT Stadius Center for Dynamical Systems, Signal Processing and Data Analytics, KU Leuven, Leuven, Belgium
*Purpose: Rejection of the kidney allograft is hallmarked by the accumulation of inflammatory cells within the renal architecture, leading to microvascular or tubulointerstitial inflammation. However,…
2022 American Transplant Congress
RNA-Sequencing Analysis of Kidney Allografts Reveal Heightened NK Cell Activity in Chronic Active Antibody-Mediated Rejection
Y. Shah, E. Varma, S. Rahim, C. Li, C. Snopkowski, C. Hughes, D. M. Dadhania, S. Salvatore, S. V. Seshan, O. Elemento, M. Suthanthiran, T. Muthukumar
Weill Cornell Medicine, New York, NY
*Purpose: The role of NK cells is increasingly recognized in chronic active antibody mediated rejection (caABMR) of the kidney allograft. Treatment of caABMR is challenging…
2022 American Transplant Congress
Absolute Quantification of Donor-Derived Cell-Free DNA Does Not Provide Additional Discriminating Power Over Donor-derived Cell-Free DNA Fraction for Detection of Allograft Rejection
R. Gohh¹, S. Jordan², R. N. Woodward³, K. M. Clark-Langone³, J. Morlan³, B. Silva³, M. Weir⁴
¹Alpert School of Medicine Brown University, Providence, RI, ²Cedars Sinai Medical Ctr, Los Angeles, CA, ³CareDx, Redwood City, CA, ⁴University of Maryland School of Medicine, Baltimore, MD
*Purpose: High level of background cell-free DNA (cfDNA) has been hypothesized as a concern for false negative results in molecular diagnostics for allograft rejection that…
2022 American Transplant Congress
Enhanced Histological Yield and Actionable Findings When Biopsy is Guided by Donor-Derived Cell-Free DNA (dd-cfDNA)
M. R. Weir¹, D. Mandelbrot², J. S. Bromberg¹, S. Mehta³, E. Poggio⁴, E. Huang⁵, G. Shekhtman⁶, N. Agrawal⁷, W. Tian⁸, M. Cooper⁹
¹University of Maryland School of Medicine, Baltimore, MD, ²University of Wisconsin, Madison, WI, ³University of Alabama, Birmingham, AL, ⁴Cleveland Clinic, Cleveland, OH, ⁵Cedars-Sinai Medical Center, Los Angeles, CA, ⁶CareDx Inc., Brisbane, CA, ⁷CareDx Inc, Brisbane, CA, ⁸CareDx, Brisbane, CA, ⁹MedStar Georgetown Transplant Institute, Washington, DC
*Purpose: Implementation of molecular biomarkers in kidney transplantation has expanded the amount of information available to clinicians before deciding to pursue biopsy. We evaluated how…
2022 American Transplant Congress
Association Between Histopathological Features on Implantation Renal Biopsies and Graft Outcomes and Kdpi
C. Khor, S. McGinn, C. Fisher, R. Yang, K. Richards, K. Muir, J. Lu
Nephrology, Royal North Shore Hospital, Sydney, Australia
*Purpose: The global shortage of organs and the increasing use of marginal kidneys for transplantation necessitates an accurate assessment of deceased donor kidneys. The kidney…
2022 American Transplant Congress
Study of the Composition of the Inflammatory Burden on a Cohort of 125 Rejections by Multiplex Immunofluorescence
A. Mobio¹, M. Eloudzeri², L. Morin¹, J. Duong Van Huyen³, D. Anglicheau¹, M. Rabant³
¹Kidney transplantation, Necker-Enfants Malades Hospital, Paris, France, ²U1151, INEM, Paris, France, ³Pathology, Necker-Enfants Malades Hospital, Paris, France
*Purpose: The exact composition of the inflammatory burden during kidney transplant rejection has not been studied on large cohorts. Moreover, the determinants and impact of…
2022 American Transplant Congress
Defining New Arterial and Arteriolar Lesions Accompanying Transplant Glomerulopathy: Potential Additions to the Histologic Assessment of ABMR
A. Perkowska-Ptasinska¹, D. Deborska-Materkowska², M. Ciszek³, M. Myslak⁴, J. Chang⁵, J. Reeve⁶, P. Halloran⁷
¹Pathology, Medical University of Warsaw, Warsaw, Poland, ²Transplantation Medicine, Nephrology and Internal Diseases, Medical University of Warsaw, Warsaw, Poland, ³Immunology, Transplantation Medicine and Internal Diseases, Medical University of Warsaw, Warsaw, Poland, ⁴Infectious Diseases, Hepatology and Liver Transplantation, Pomeranian Medical University, Szczecin, Poland, ⁵Alberta Transplant Applied Genomics Center, Edmonton, AB, Canada, ⁶Alberta Transplant Applied Genomics Centre, Edmonton, AB, Canada, ⁷Pathology, Alberta Transplant Applied Genomics Centre, University of Alberta, Edmonton, AB, Canada
*Purpose: Transplant glomerulopathy (TG) results from chronic endothelial injury most commonly related to ABMR. Surprisingly, except for PTC, the relation between TG and other vascular…
2022 American Transplant Congress
Urinary Cell CTOT-04 Signature is Diagnostic of Glomerulitis in Kidney Allograft Biopsies
T. Salinas¹, C. Li¹, C. Snopkowski¹, K. Chen¹, S. Albakry¹, S. Salvatore², S. Seshan², J. R. Lee¹, M. Thangamani¹, D. Dadhania¹, M. Suthanthiran¹
¹Nephrology, Weill Cornell-NYPH, New York, NY, ²Pathology, Weill Cornell-NYPH, New York, NY
*Purpose: Antibody mediated rejection is a significant complication after kidney transplantation and is an important cause of allograft failure. In the multicenter CTOT-04 study, we…
2022 American Transplant Congress
Histologic Predictors of Graft Loss in Early Clinically Indicated Biopsies After Kidney Transplantation
M. Ajaimy¹, V. Hemmige², L. E. Liriano-Ward³, Y. Azzi¹, S. Kapoor⁴, P. Loarte¹, C. Pynadath⁵, A. Colovai¹, E. Akalin⁶
¹Einstein-Montefiore Transplant Center, Bronx, NY, ²Montefiore Medical Center, Bronx, NY, ³Transplant, Montefiore Medical Center, Bronx, NY, ⁴Montefiore Medical Center, New York, NY, ⁵Einstein-Montefiore Transplant Center, Scarsdale, NY, ⁶Albert Einstein College of Medicine, Montefiore Medical Ctr, Bronx, NY
*Purpose: We aimed to investigate histopathological predictors of graft lost in patients who underwent clinically indicated biopsies for worsening kidney function and/or proteinuria within 3…
2022 American Transplant Congress
Unravelling the Stage-Shift of Acute Rejection by Urine QSant
W. Yazar¹, N. Titzler¹, R. Sarwal¹, M. Sarwal², S. Ghosh¹
¹Nephrosant, Brisbane, CA, ²NephroSant, Brisbane, CA
*Purpose: Suboptimal performance in current methods for allograft monitoring underscores the unmet need for enhanced immunosurveillance accuracy, to uncover the alloimmunity flux. QSant[Yang et al,…

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