C4d Immunostaining and Molecular Tools for Heart Transplant Rejection

C4d Immunostaining and Molecular Tools for Heart Transplant Rejection – Heart transplantation is currently the most effective treatment option for patients with end-stage heart failure unresponsive to optimal medical therapy (1-3). Despite significant advancements in immunosuppressive therapies and transplant management, acute and chronic rejection-related allograft injuries remain among the leading causes of death and morbidity post-transplant, thereby limiting patient longevity. Improving rejection management remains an unmet medical need (5). Currently, the diagnosis of cardiac rejection predominantly depends on the pathological evaluation of endomyocardial biopsies (EMBs), which involves detecting and grading cellular infiltrates and myocardial injury (1, 6, 7).

C4d Immunostaining and Molecular Tools for Heart Transplant Rejection

In a recent study “Heart allograft rejection: molecular diagnosis using intra-graft targeted gene expression profiling” by Giarraputo A and colleagues explore the use of targeted gene expression analysis within cardiac graft tissue to improve the molecular diagnosis of heart transplant rejection. The research aims to identify specific gene expression patterns associated with rejection episodes, providing a potentially more precise and early detection method compared to traditional histopathological assessment. This approach could enhance rejection monitoring and guide more tailored therapeutic interventions in heart transplant recipients.

The study showed that a novel molecular diagnostic system based on formalin-fixed, paraffin-embedded (FFPE) tissue accurately detects cardiac allograft rejection. A tool that could be easily applicable in clinical settings alongside pathology and has the potential to improve the precision of rejection diagnosis.

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• widely cited in over 100 publications 

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Literature:

1. 2016 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure: The Task Force for the diagnosis and treatment of acute and chronic heart failure of the European Society of Cardiology (ESC)Developed with the special contribution of the Heart Failure Association (HFA) of the ESC. Ponikowski P, Voors AA, Anker SD, Bueno H, Cleland JGF, Coats AJS, Falk V, González-Juanatey JR, Harjola VP, Jankowska EA, Jessup M, Linde C, Nihoyannopoulos P, Parissis JT, Pieske B, Riley JP, Rosano GMC, Ruilope LM, Ruschitzka F, Rutten FH, van der Meer P; ESC Scientific Document Group. Eur Heart J. 2016 Jul 14;37(27):2129-2200. PMID: 27206819.
2. 2017 ACC/AHA/HFSA Focused Update of the 2013 ACCF/AHA Guideline for the Management of Heart Failure: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Failure Society of America. Yancy CW, Jessup M, Bozkurt B, Butler J, Casey DE Jr, Colvin MM, Drazner MH, Filippatos GS, Fonarow GC, Givertz MM, Hollenberg SM, Lindenfeld J, Masoudi FA, McBride PE, Peterson PN, Stevenson LW, Westlake C. Circulation. 2017 Aug 8;136(6):e137-e161. PMID: 28455343.
3. Molecular Diagnosis of Heart Allograft Rejection Using Intra-Graft Targeted Gene Expression Profiling: the heart HistoMX system. Alessia Giarraputo, Guillaume Coutance, JigneshK. Patel, Marny Fedrigo, Olivier Aubert, Jessy Dagobert, Fariza Mezine, Blaise Robin, Philippe Rouvier, Shaida Varnous, Jean Paul Duong Van Huyen, Patrick Bruneval, Annalisa Angelini, Jon Kobashigawa, Alexandre Loupy.
4. Heart allograft rejection: molecular diagnosis using intra-graft targeted gene expression profiling. Giarraputo A, Coutance G, Patel JK, Fedrigo M, Aubert O, Varnous S, Barison I, Castellani C, Duong Van Huyen JP, Dagobert J, Mezine F, Robin B, Zielinski D, Rouvier P, Leprince P, Achouh P, Gerosa G, Verkarre V, Jouven X, Bruneval P, Angelini A, Kobashigawa J, Loupy A. Eur Heart J. 2026 Feb 23;47(8):956-970. PMID: 41342627.
5. The management of antibodies in heart transplantation: An ISHLT consensus document. Kobashigawa J, Colvin M, Potena L, Dragun D, Crespo-Leiro MG, Delgado JF, Olymbios M, Parameshwar J, Patel J, Reed E, Reinsmoen N, Rodriguez ER, Ross H, Starling RC, Tyan D, Urschel S, Zuckermann A. J Heart Lung Transplant. 2018 May;37(5):537-547. doi: 10.1016/j.healun.2018.01.1291. Epub 2018 Jan 31. PMID: 29452978.
6. Heart Transplant Rejection: From the Endomyocardial Biopsy to Gene Expression Profiling. Biomedicines. Farcas AO, Stoica MC, Maier IM, Maier AC, Sin AI.2024 Aug 22;12(8):1926. doi: 10.3390/biomedicines12081926. PMID: 39200392; PMCID: PMC11351478.
7. A Review of Biomarkers of Cardiac Allograft Rejection: Toward an Integrated Diagnosis of Rejection. Coutance G, Desiré E, Duong Van Huyen JP.Biomolecules. 2022 Aug 18;12(8):1135. doi: 10.3390/biom12081135. PMID: 36009029; PMCID: PMC9405997.