Volume 33, Issue 9 pp. 1016-1029
Original Article

Donor helper innate lymphoid cells are replaced earlier than lineage positive cells and persist long-term in human intestinal grafts – a descriptive study

Elena Gómez-Massa

Corresponding Author

Elena Gómez-Massa

Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain

Imas12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain

Correspondence

Elena Gómez-Massa, Avenida de Córdoba s/n, 28041, Madrid, Spain.

Tel.: +34 917792756;

fax: +34 917792756;

e-mail: [email protected]

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María Lasa-Lázaro

María Lasa-Lázaro

Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain

Imas12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain

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Francisco Javier Gil-Etayo

Francisco Javier Gil-Etayo

Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain

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Esperanza Ulloa-Márquez

Esperanza Ulloa-Márquez

Department of Gastroenterology, University Hospital 12 de Octubre, Madrid, Spain

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Iago Justo

Iago Justo

HPB Surgery and Abdominal Transplantation Unit, General Surgery Service, University Hospital 12 de Octubre, Madrid, Spain

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Carmelo Loinaz

Carmelo Loinaz

HPB Surgery and Abdominal Transplantation Unit, General Surgery Service, University Hospital 12 de Octubre, Madrid, Spain

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Jorge Calvo-Pulido

Jorge Calvo-Pulido

HPB Surgery and Abdominal Transplantation Unit, General Surgery Service, University Hospital 12 de Octubre, Madrid, Spain

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Estela Paz-Artal

Estela Paz-Artal

Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain

Imas12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain

School of Medicine, Complutense University, Madrid, Spain

Section of Immunology, San Pablo CEU University, Madrid, Spain

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Paloma Talayero

Paloma Talayero

Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain

Imas12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain

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First published: 04 April 2020
Citations: 11

Summary

Intestinal grafts carry large donor lymphoid load that is replaced by recipient cells. The dynamics of this process may influence the tolerance, rejection or graft-versus-host disease. We analysed distribution and turnover of T and B (Lin+) lymphocytes, natural killer (NK) and helper innate lymphoid cells (hILC) in intestinal epithelium (IEp) and lamina propia (LP) from a long-term cohort of eight intestinal recipients and from a single patient monitored deeply during the first 8 months post-transplant (posTx). Long-term intestinal grafts showed significantly higher %hILC than native bowels in IEp and LP until 10 years posTx and recovery to normal levels was observed afterwards. We also observed an imbalance between hILC subsets in IEp [increase of type 1 (ILC1) and decrease in type 3 (ILC3) innate lymphoid cells] that persisted along posTx time even when %hILC was similar to native bowels. Regarding hILC origin, we still detected the presence of donor cells at 13 years posTx. However, this chimerism was significantly lower than in Lin+ and NK populations. According to these findings, observation from the patient monitored in early posTx period showed that recipient hILC repopulate earlier and faster than Lin+ cells, with increase in ILC1 related to rejection and infection episodes.

Conflicts of interest

The authors of this manuscript have no conflicts of interest to disclose.

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