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Three lines of transgenic mice carrying the human immunodeficiency virus type 1 (HIV-1) long terminal repeat fused to the simian virus 40 early region (HIV-1 Tag) were constructed. Expression of the transgenes was reproducibly observed in the lymphoid tissue and skin of all three transgenic lines studied. Interestingly, cell types other than T cells, i.e., B cells and thymic stromal cells, contributed most of the expression detectable in the lymphoid organs. Each transgenic line also displayed a different but consistent pattern of transgene expression in nonlymphoid organs. These individual patterns probably reflect the effects of particular chromosomal integration sites on transcriptional activity of the HIV-1 promoter.

Expression of a human immunodeficiency virus type 1 long terminal repeat/simian virus 40 early region fusion gene in transgenic mice