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Cifaldi C, Cotugno N, Di Cesare S, Giliani S, Di Matteo G, Amodio D, Piano Mortari E, Chiriaco M, Buonsenso D, Zangari P, Pagliara D, Gaspari S, Carsetti R, Palma P, Finocchi A, Locatelli F, Rossi P, Doria M, Cancrini C. Partial T cell defects and expanded CD56 bright NK cells in an SCID patient carrying hypomorphic mutation in the IL2RG gene. J Leukoc Biol 2020; 108:739-748. [PMID: 32392633 DOI: 10.1002/jlb.5ma0220-239r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 02/03/2020] [Accepted: 02/19/2020] [Indexed: 01/01/2023] Open
Abstract
X-linked severe combined immunodeficiency (X-SCID) caused by full mutation of the IL2RG gene leads to T- B+ NK- phenotype and is usually associated with severe opportunistic infections, diarrhea, and failure to thrive. When IL2RG hypomorphic mutation occurs, diagnosis could be delayed and challenging since only moderate reduction of T and NK cells may be present. Here, we explored phenotypic insights and the impact of the p.R222C hypomorphic mutation (IL2RGR222C ) in distinct cell subsets in an 8-month-old patient with atypical X-SCID. We found reduced CD4+ T cell counts, a decreased frequency of naïve CD4+ and CD8+ T cells, and an expansion of B cells. Ex vivo STAT5 phosphorylation was impaired in CD4+ CD45RO+ T cells, yet compensated by supraphysiological doses of IL-2. Sanger sequencing on purified cell subsets showed a partial reversion of the mutation in total CD3+ cells, specifically in recent thymic emigrants (RTE), effector memory (EM), and CD45RA+ terminally differentiated EM (EMRA) CD4+ T cells. Of note, patient's NK cells had a normal frequency compared to age-matched healthy subjects, but displayed an expansion of CD56bright cells with higher perforin content and cytotoxic potential, associated with accumulation of NK-cell stimulatory cytokines (IL-2, IL-7, IL-15). Overall, this report highlights an alteration in the NK-cell compartment that, together with the high disease-phenotype variability, should be considered in the suspicion of X-SCID with hypomorphic IL2RG mutation.
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Affiliation(s)
- Cristina Cifaldi
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy
| | - Nicola Cotugno
- Research Unit of Congenital and Perinatal Infection, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Silvia Di Cesare
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Silvia Giliani
- Department of Molecular and Translational Medicine, A. Nocivelli Institute for Molecular Medicine, University of Brescia, Brescia, Italy
| | - Gigliola Di Matteo
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Donato Amodio
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Eva Piano Mortari
- Immunology Research Division, Bambino Gesù Childrens' Hospital IRCCS, Rome, Italy
| | - Maria Chiriaco
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy
| | - Danilo Buonsenso
- Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
| | - Paola Zangari
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy
| | - Daria Pagliara
- Department of Pediatric Hematology and Oncology, Bambino Gesù Childrens' Hospital IRCCS, Rome, Italy
| | - Stefania Gaspari
- Department of Pediatric Hematology and Oncology, Bambino Gesù Childrens' Hospital IRCCS, Rome, Italy
| | - Rita Carsetti
- Immunology Research Division, Bambino Gesù Childrens' Hospital IRCCS, Rome, Italy
| | - Paolo Palma
- Research Unit of Congenital and Perinatal Infection, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Andrea Finocchi
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Franco Locatelli
- Department of Pediatric Hematology and Oncology, Bambino Gesù Childrens' Hospital IRCCS, Rome, Italy.,Department of Pediatrics, Sapienza University of Rome, Rome, Italy
| | - Paolo Rossi
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Research Unit of Congenital and Perinatal Infection, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Margherita Doria
- Research Unit of Congenital and Perinatal Infection, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy
| | - Caterina Cancrini
- Unit of Immune and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Childrens' Hospital-Scientific Institute for Research and Healthcare (IRCCS), Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
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Attardi E, Di Cesare S, Amodio D, Giancotta C, Cotugno N, Cifaldi C, Chiriaco M, Palma P, Finocchi A, Di Matteo G, Rossi P, Cancrini C. Phenotypical T Cell Differentiation Analysis: A Diagnostic and Predictive Tool in the Study of Primary Immunodeficiencies. Front Immunol 2019; 10:2735. [PMID: 31849946 PMCID: PMC6896983 DOI: 10.3389/fimmu.2019.02735] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 11/07/2019] [Indexed: 01/14/2023] Open
Abstract
Multiparametric flow cytometry (MFC) represents a rapid, highly reproducible, and sensitive diagnostic technology for primary immunodeficiencies (PIDs), which are characterized by a wide range of T cell perturbations and a broad clinical and genetic heterogeneity. MFC data from CD4+ and CD8+ T cell subsets were examined in 100 patients referred for Primary Immunodeficiencies to our center. Naïve, central memory, effector memory, and terminal effector memory cell differentiation stages were defined by the combined expression CD45RA/CD27 for CD4 and CD45RA/CCR7 for CD8. Principal component analysis (PCA), a non-hypothesis driven statistical analysis, was applied to analyze MFC data in order to distinguish the diverse PIDs. Among severe lymphopenic patients, those affected by severe combined and combined immunodeficiency (SCID and CID) segregated in a specific area, reflecting a homogenous, and a more severe T cell impairment, compared to other lymphopenic PID, such as thymectomized and partial DiGeorge syndrome patients. PID patients with predominantly antibody defects were distributed in a heterogeneous pattern, but unexpectedly PCA was able to cluster some patients' resembling CID, hence warning for additional and more extensive diagnostic tests and a diverse clinical management. In conclusion, PCA applied to T cell MFC data might help the physician to estimate the severity of specific PID and to diversify the clinical and diagnostic approach of the patients.
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Affiliation(s)
- Enrico Attardi
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy.,Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Silvia Di Cesare
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Donato Amodio
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Carmela Giancotta
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy
| | - Nicola Cotugno
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy.,Research Unit of Congenital and Perinatal Infection, Academic Department of Pediatrics, Children's Hospital Bambino Gesù, Rome, Italy
| | - Cristina Cifaldi
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy
| | - Maria Chiriaco
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy
| | - Paolo Palma
- Research Unit of Congenital and Perinatal Infection, Academic Department of Pediatrics, Children's Hospital Bambino Gesù, Rome, Italy
| | - Andrea Finocchi
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Gigliola Di Matteo
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Paolo Rossi
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Caterina Cancrini
- Unit of Immunology and Infectious Diseases, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, Rome, Italy.,Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
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