The 30-bp Deletion Variant of Epstein-Barr Virus-Encoded Latent Membrane Protein-1 Prevails in Acute Infectious Mononucleosis

Berger, Christoph ; McQuain, Cathy ; Sullivan, John L. ; Nadal, David ; Quesenberry, Peter J. ; Knecht, Hans

In: Journal of Infectious Diseases, 1997, vol. 176, no. 5, p. 1370-1373

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    Summary
    To assess the frequency of malignancy-associated 30-bp deletion variants of the latent membrane protein 1 (LMP-1) in benign conditions, a comparative sequence analysis was done using samples from 20 American children with acute infectious mononucleosis and 16 Swiss children with chronic tonsillar hyperplasia. The 30-bp deletion variant (LMP-1-del) was present in 66% of patients (12/20 with infectious mononucleosis and 12/16 with tonsillar hyperplasia). Two additional patients had a 3-bp deletion and an inframe insertion of 18 nucleotides, respectively. All but 1 isolate had numerous nonsilent point mutations. These data identify a hypervariable region within the Cterminus of LMP-1, in a domain required for maximal stimulation of NF-κB activity. These data demonstrate that LMP-1-del variants are frequent in acute infectious mononucleosis and tonsillar hyperplasia and identical to those observed in Epstein-Barr virus-associated AIDS-related lymphoma