Abstract:
:Epstein-Barr virus (EBV) occasionally infects T and NK cells and causes EBV-infected T/NK-cell lymphoproliferative disease (LPD), which comprises chronic active EBV infection, EBV-associated hemophagocytic syndrome, mosquito allergy, hydroa vacciniforme, aggressive NK-cell leukemia, and NK/T-cell lymphoma. The diagnosis is proven by the monoclonal proliferation of EBV-infected T or NK cells, which is a time-consuming and complicated method. T-cell monoclonality is helpful for the screening of EBV-infected T-cell LPD in patients with EBV-genome burden and is easily shown with T-cell-receptor rearrangement or the T-cell repertoire, whereas NK-cell monoclonality is difficult to prove due to its lacking such rearranged receptors. We investigated a set of killer immunoglobulin-like receptors (KIRs) and also CD94-NKG2 heterodimers on NK cells, namely the NK-cell repertoire. Skewed repertoires were seen in all patients with EBV-infected NK-cell LPD, but not in any patients with EBV-infected T-cell LPD and were restored only after successful treatment. The normal KIR repertoire is variable for each individual and it seems difficult to detect minimal residual EBV-infected lymphocytes. However, the NK-cell repertoire is feasible for identifying EBV-infected NK-cell LPD and evaluating the treatment effect.
journal_name
Am J Hematoljournal_title
American journal of hematologyauthors
Sawada A,Sato E,Koyama M,Higuchi B,Kusuki S,Kim JY,Takeshita Y,Sakata A,Sakata N,Okamura T,Yasui M,Inoue M,Kawa Kdoi
10.1002/ajh.20659subject
Has Abstractpub_date
2006-08-01 00:00:00pages
576-81issue
8eissn
0361-8609issn
1096-8652journal_volume
81pub_type
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