Ex vivo T-lymphopoiesis assays assisting corrective treatment choice for genetically undefined T-lymphocytopaenia

Zainab M Golwala, Helena Spiridou Goncalves, Ranjita Devi Moirangthem, Grace Evans, Sabrina Lizot, Coco de Koning, Alexandrine Garrigue, Marta Martin Corredera, Juan Moises Ocampo-Godinez, Evey Howley, Susanne Kricke, Arnold Awuah, Irene Obiri-Yeboa, Rajeev Rai, Neil Sebire, Fanette Bernard, Victoria Bordon Cueto De Braem, Kaan Boztug, Theresa Cole, Andrew R GenneryScott Hackett, Sophie Hambleton, Mette Holm, Maaike A Kusters, Adam Klocperk, Antonio Marzollo, Nufar Marcus, Zohreh Nademi, Jana Pachlopnik Schmid, Herbert Pichler, Anna Sellmer, Pere Soler-Palacin, Maarja Soomann, Paul Torpiano, Joris van Montfrans, Stefan Nierkens, Stuart Adams, Matthew Buckland, Kimberly Gilmour, Austen Worth, Adrian J Thrasher, E Graham Davies, Isabelle André, Alexandra Y Kreins

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Persistent selective T-lymphocytopenia is found both in SCID and congenital athymia. Without molecular diagnosis, it is challenging to determine whether HCT or thymus transplantation ought to be performed. Ex vivo T-lymphopoiesis assays have been proposed to assist clinical decision-making for genetically undefined patients. We investigated 20 T-lymphocytopenic patients, including 13 patients awaiting first-line treatment and 7 patients with failed immune reconstitution after previous HCT or thymus transplantation. Whilst developmental blocks in ex vivo T-lymphopoiesis indicated hematopoietic cell-intrinsic defects, successful T-lymphocyte differentiation required careful interpretation, in conjunction with clinical status, immunophenotyping, and genetic investigations. Of the 20 patients, 13 proceeded to treatment, with successful immune reconstitution observed in 4 of the 6 patients post-HCT and 4 of the 7 patients after thymus transplantation, the latter including two patients who had previously undergone HCT. Whilst further validation and standardization are required, we conclude that assessing ex vivo T-lymphopoiesis during the diagnostic pathway for genetically undefined T-lymphocytopenia improves patient outcomes by facilitating corrective treatment choice.

Original languageEnglish
Article number110453
Number of pages13
JournalClinical Immunology
Volume274
Early online date16 Feb 2025
DOIs
Publication statusE-pub ahead of print - 16 Feb 2025

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