Characterization of Epstein-Barr Virus (EBV)-infected Cells in EBV-associated Hemophagocytic Lymphohistiocytosis in Two Patients with X-linked Lymphoproliferative Syndrome Type 1 and Type 2
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Background: X-linked lymphoproliferative syndrome (XLP) is a rare inherited immunodeficiency by an extreme vulnerability to Epstein-Barr virus (EBV) infection, frequently resulting in hemophagocytic lymphohistiocytosis (HLH). XLP are now divided into type 1 (XLP-1) and type 2 (XLP-2), which are caused by mutations of SH2D1A/SLAM-associated protein (SAP) and X-linked inhibitor of apoptosis protein (XIAP) genes, respectively. The diagnosis of XLP in individuals with EBV-associated HLH (EBV-HLH) is generally difficult because they show basically similar symptoms to sporadic EBV-HLH. Although EBV-infected cells in sporadic EBV-HLH are known to be mainly in CD8+ T cells, the cell-type of EBV-infected cells in EBV-HLH seen in XLP patients remains undetermined.
Methods: EBV-infected cells in two patients (XLP-1 and XLP-2) presenting EBV-HLH were evaluated by in EBER-1 in situ hybridization or quantitative PCR methods.
Results: Both XLP patients showed that the dominant population of EBV-infected cells was CD19+ B cells, whereas EBV-infected CD8+ T cells were very few.
Conclusions: In XLP-related EBV-HLH, EBV-infected cells appear to be predominantly B cells. B cell directed therapy such as rituximab may be a valuable option in the treatment of EBV-HLH in XLP patients.
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Tomomasa D, Tanita K, Hiruma Y, Hoshino A, Kudo K, Azumi S Int J Hematol. 2024; 120(2):241-251.
PMID: 38700651 DOI: 10.1007/s12185-024-03786-0.
Ricci S, Sarli W, Lodi L, Canessa C, Lippi F, Dini D Front Immunol. 2024; 15:1282804.
PMID: 38415256 PMC: 10896843. DOI: 10.3389/fimmu.2024.1282804.
Yonese I, Sakashita C, Imadome K, Kobayashi T, Yamamoto M, Sawada A Blood Adv. 2020; 4(13):2918-2926.
PMID: 32598475 PMC: 7362364. DOI: 10.1182/bloodadvances.2020001451.
Ishimura M, Eguchi K, Shiraishi A, Sonoda M, Azuma Y, Yamamoto H Front Pediatr. 2019; 7:183.
PMID: 31231620 PMC: 6558365. DOI: 10.3389/fped.2019.00183.