Clinico-biological refinement of BCL11B-related disorder and identification of an episignature: A series of 20 unreported individuals

Quentin Sabbagh, Sadegheh Haghshenas, Juliette Piard, Chloé Trouvé, Jeanne Amiel, Tania Attié-Bitach, Tugce Balci, Mouna Barat-Houari, Alyce Belonis, Odile Boute, Diana S. Brightman, Ange-Line Bruel, Stefano Giuseppe Caraffi, Nicolas Chatron, Corinne Collet, William Dufour, Patrick Edery, Chin-To Fong, Carlo Fusco, Vincent GatinoisEvan Gouy, Anne-Marie Guerrot, Solveig Heide, Aakash Joshi, Natalya Karp, Boris Keren, Marion Lesieur-Sebellin, Jonathan Levy, Michael A. Levy, Claire Lozano, Stanislas Lyonnet, Henri Margot, Pauline Marzin, Haley McConkey, Vincent Michaud, Gaël Nicolas, Mevyn Nizard, Alix Paulet, Francesca Peluso, Vincent Pernin, Laurence Perrin, Christophe Philippe, Chitra Prasad, Madhavi Prasad, Raissa Relator, Marlène Rio, Sophie Rondeau, Valentin Ruault, Nathalie Ruiz-Pallares, Elodie Sanchez, Debbie Shears, Victoria Mok Siu, Arthur Sorlin, Matthew Tedder, Mylène Tharreau, Frédéric Tran Mau-Them, Liselot van der Laan, Julien van Gils, Alain Verloes, Sandra Whalen, Marjolaine Willems, K. vin Yauy, Roberta Zuntini, Jennifer Kerkhof, Bekim Sadikovic, David Geneviève

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2 Citations (Scopus)

Abstract

Purpose: BCL11B-related disorder (BCL11B-RD) arises from rare genetic variants within the BCL11B gene, resulting in a distinctive clinical spectrum encompassing syndromic neurodevelopmental disorder, with or without intellectual disability, associated with facial features and impaired immune function. This study presents an in-depth clinico-biological analysis of 20 newly reported individuals with BCL11B-RD, coupled with a characterization of genome-wide DNA methylation patterns of this genetic condition. Methods: Through an international collaboration, clinical and molecular data from 20 individuals were systematically gathered, and a comparative analysis was conducted between this series and existing literature. We further scrutinized peripheral blood DNA methylation profile of individuals with BCL11B-RD, contrasting them with healthy controls and other neurodevelopmental disorders marked by established episignature. Results: Our findings unveil rarely documented clinical manifestations, notably including Rubinstein-Taybi-like facial features, craniosynostosis, and autoimmune disorders, all manifesting within the realm of BCL11B-RD. We refine the intricacies of T cell compartment alterations of BCL11B-RD, revealing decreased levels naive CD4+ T cells and recent thymic emigrants while concurrently observing an elevated proportion of effector-memory expressing CD45RA CD8+ T cells (TEMRA). Finally, a distinct DNA methylation episignature exclusive to BCL11B-RD is unveiled. Conclusion: This study serves to enrich our comprehension of the clinico-biological landscape of BCL11B-RD, potentially furnishing a more precise framework for diagnosis and follow-up of individuals carrying pathogenic BCL11B variant. Moreover, the identification of a unique DNA methylation episignature offers a valuable diagnosis tool for BCL11B-RD, thereby facilitating routine clinical practice by empowering physicians to reevaluate variants of uncertain significance within the BCL11B gene.
Original languageEnglish
Article number101007
JournalGenetics in medicine
Volume26
Issue number1
DOIs
Publication statusPublished - 1 Jan 2024

Keywords

  • BCL11B
  • Epigenetic signature
  • Neurodevelopmental delay
  • T cells

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