TY - JOUR
T1 - Ex vivo T-lymphopoiesis assays assisting corrective treatment choice for genetically undefined T-lymphocytopaenia
AU - Golwala, Zainab M
AU - Goncalves, Helena Spiridou
AU - Moirangthem, Ranjita Devi
AU - Evans, Grace
AU - Lizot, Sabrina
AU - de Koning, Coco
AU - Garrigue, Alexandrine
AU - Corredera, Marta Martin
AU - Ocampo-Godinez, Juan Moises
AU - Howley, Evey
AU - Kricke, Susanne
AU - Awuah, Arnold
AU - Obiri-Yeboa, Irene
AU - Rai, Rajeev
AU - Sebire, Neil
AU - Bernard, Fanette
AU - De Braem, Victoria Bordon Cueto
AU - Boztug, Kaan
AU - Cole, Theresa
AU - Gennery, Andrew R
AU - Hackett, Scott
AU - Hambleton, Sophie
AU - Holm, Mette
AU - Kusters, Maaike A
AU - Klocperk, Adam
AU - Marzollo, Antonio
AU - Marcus, Nufar
AU - Nademi, Zohreh
AU - Schmid, Jana Pachlopnik
AU - Pichler, Herbert
AU - Sellmer, Anna
AU - Soler-Palacin, Pere
AU - Soomann, Maarja
AU - Torpiano, Paul
AU - van Montfrans, Joris
AU - Nierkens, Stefan
AU - Adams, Stuart
AU - Buckland, Matthew
AU - Gilmour, Kimberly
AU - Worth, Austen
AU - Thrasher, Adrian J
AU - Davies, E Graham
AU - André, Isabelle
AU - Kreins, Alexandra Y
N1 - Publisher Copyright:
© 2025 The Authors
PY - 2025/2/16
Y1 - 2025/2/16
N2 - 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.
AB - 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.
U2 - 10.1016/j.clim.2025.110453
DO - 10.1016/j.clim.2025.110453
M3 - Article
C2 - 39965724
SN - 1521-6616
VL - 274
JO - Clinical Immunology
JF - Clinical Immunology
M1 - 110453
ER -