Molecular Landscape of Microvascular Inflammation in Kidney Allografts

Kidney Rejection Transplant Clinical Trial

Official title:

Comprehensive Multiscale Characterization of the Molecular Landscape of Microvascular Inflammation in Kidney Allografts

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT06342128
• Other study ID #: MVI_Kidney_001
• Status: Recruiting
• Start date: January 1, 2022
• Est. completion date: December 2024

Study information

• Verified date: April 2024
• Source: Paris Translational Research Center for Organ Transplantation
• Contact: Alexandre Loupy, MD PhD
• Phone: +33612491082
• Email: alexandreloupy[@]inserm.fr
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Microvascular inflammation in kidney allografts has been widely reappraised in the recent update of Banff classification. There is a critical need to better understand the pathophysiological mechanisms associated with the various phenotypes of microvascular inflammation that are observed in kidney transplants, particularly in order to develop targeted therapeutic approaches.

Description:

Antibody-mediated rejection is a major cause of graft failure in kidney transplant recipients. The diagnostic criteria for antibody-mediated rejection have undergone significant changes since their initial definition in the international Banff Classification system. The Banff 2022 Classification update reappraises lesions of microvascular inflammation and identifies new phenotypes for cases with microvascular inflammation. However, pathophysiological mechanisms associated with microvascular inflammation in kidney allografts are still poorly understood, thus hampering the development of efficient treatments. The aims of this study are: 1. To decipher the spatial immune-molecular landscape of microvascular inflammation in kidney allografts. 2. To compare the characteristics of this landscape in different clinical scenarios. The investigators will use a multimodal phenotyping approach including histological analyses and multiplex immunostainings, bulk transcriptomic analyses and spatial whole-transcriptome digital profiling to decipher the molecular landscape of microvascular inflammation in kidney allografts. Based on these results, they will investigate its association with allograft outcomes and search for molecular targets which could benefit from targeted therapeutic strategies.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 600
• Est. completion date: December 2024
• Est. primary completion date: June 2024
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 100 Years

Eligibility

Inclusion Criteria:

• Adult kidney transplant recipients, with at least one kidney transplant biopsy performed and assessed according to the international Banff 2022 classification, with or without lesions of microvascular inflammation

Exclusion Criteria:

• Inadequate biopsy according to the Banff classification
• Missing data for Banff lesion scores, donor-specific antibody status, C4d staining
• Biopsies showing histological signs of ischemia-reperfusion
• Combined transplantation and kidney transplantation after a non-kidney solid organ transplantation

Related Conditions & MeSH terms

• Inflammation
• Kidney Rejection Transplant

Intervention

Other:
• No intervention
No intervention

Locations

Country	Name	City	State
France	Bichat Hospital, Assistance Publique - Hôpitaux de Paris	Paris
France	Kidney Transplant Department, Necker Hospital, Assistance Publique - Hôpitaux de Paris	Paris
France	Kidney Transplant Department, Saint-Louis Hospital, Assistance Publique - Hôpitaux de Paris	Paris

Sponsors (1)

Lead Sponsor	Collaborator
Paris Translational Research Center for Organ Transplantation

Country where clinical trial is conducted

France, 

References & Publications (4)

Loupy A, Haas M, Roufosse C, Naesens M, Adam B, Afrouzian M, Akalin E, Alachkar N, Bagnasco S, Becker JU, Cornell LD, Clahsen-van Groningen MC, Demetris AJ, Dragun D, Duong van Huyen JP, Farris AB, Fogo AB, Gibson IW, Glotz D, Gueguen J, Kikic Z, Kozakowski N, Kraus E, Lefaucheur C, Liapis H, Mannon RB, Montgomery RA, Nankivell BJ, Nickeleit V, Nickerson P, Rabant M, Racusen L, Randhawa P, Robin B, Rosales IA, Sapir-Pichhadze R, Schinstock CA, Seron D, Singh HK, Smith RN, Stegall MD, Zeevi A, Solez K, Colvin RB, Mengel M. The Banff 2019 Kidney Meeting Report (I): Updates on and clarification of criteria for T cell- and antibody-mediated rejection. Am J Transplant. 2020 Sep;20(9):2318-2331. doi: 10.1111/ajt.15898. Epub 2020 May 28. — View Citation

Loupy A, Mengel M, Haas M. Thirty years of the International Banff Classification for Allograft Pathology: the past, present, and future of kidney transplant diagnostics. Kidney Int. 2022 Apr;101(4):678-691. doi: 10.1016/j.kint.2021.11.028. Epub 2021 Dec 17. — View Citation

Mengel M, Loupy A, Haas M, Roufosse C, Naesens M, Akalin E, Clahsen-van Groningen MC, Dagobert J, Demetris AJ, Duong van Huyen JP, Gueguen J, Issa F, Robin B, Rosales I, Von der Thusen JH, Sanchez-Fueyo A, Smith RN, Wood K, Adam B, Colvin RB. Banff 2019 Meeting Report: Molecular diagnostics in solid organ transplantation-Consensus for the Banff Human Organ Transplant (B-HOT) gene panel and open source multicenter validation. Am J Transplant. 2020 Sep;20(9):2305-2317. doi: 10.1111/ajt.16059. Epub 2020 Jun 27. — View Citation

Naesens M, Roufosse C, Haas M, Lefaucheur C, Mannon RB, Adam BA, Aubert O, Bohmig GA, Callemeyn J, Clahsen-van Groningen M, Cornell LD, Demetris AJ, Drachenberg CB, Einecke G, Fogo AB, Gibson IW, Halloran P, Hidalgo LG, Horsfield C, Huang E, Kikic Z, Kozakowski N, Nankivell B, Rabant M, Randhawa P, Riella LV, Sapir-Pichhadze R, Schinstock C, Solez K, Tambur AR, Thaunat O, Wiebe C, Zielinski D, Colvin R, Loupy A, Mengel M. The Banff 2022 Kidney Meeting Report: Reappraisal of microvascular inflammation and the role of biopsy-based transcript diagnostics. Am J Transplant. 2024 Mar;24(3):338-349. doi: 10.1016/j.ajt.2023.10.016. Epub 2023 Oct 28. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	RNA-based molecular signatures assessed using bulk and spatial transcriptomics		1 day (at time of a kidney allograft biopsy)
Primary	Probability of graft survival based on outcome data		24 months post-kidney allograft biopsy
Primary	Probability of patient survival on outcome data		24 months post-kidney allograft biopsy