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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1992 Aug 15;89(16):7831–7835. doi: 10.1073/pnas.89.16.7831

Detection of a human intracisternal retroviral particle associated with CD4+ T-cell deficiency.

S Gupta 1, C E Ribak 1, S Gollapudi 1, C H Kim 1, S Z Salahuddin 1
PMCID: PMC49805  PMID: 1380169

Abstract

A number of non-human-immunodeficiency-virus (HIV) type 1 disorders are associated with CD4+ T-cell deficiency and dysfunction. However, the etiopathogenesis of CD4+ T-cell immunodeficiency in these disease states remains unclear. Human intracisternal retroviral (HICRV) particles were detected in a lymphoblastoid cell line exposed to mononuclear cells from a patient with severe CD4+ T-cell deficiency without risk factors for HIV infection. Ultrastructurally, the HICRV is distinct from HIV-1, HIV-2, human T-lymphotropic virus (HTLV) type I, and HTLV-II. Supernatants of activated mononuclear cells showed significant reverse transcriptase activity that was predominantly Mn2+ dependent. The patient's mononuclear cells were negative for HIV-1, HIV-2, HTLV-I, and HTLV-II proviruses as demonstrated by the lack of amplification by PCR. Also, the patient's serum was negative for antibodies to HIV-1, HTLV-I, and HTLV-II and for HIV-1 p24 antigen; however, serum was positive for antibodies against the HICRV as demonstrated by Western blot. Similar HICRV particles were detected in a lymphoblastoid cell line exposed to mononuclear cells from the patient's daughter, who showed CD4+ T-cell dysfunction. The HICRV may be associated with CD4+ T-cell immunodeficiency and dysfunction in patients without risk for HIV-1, HIV-2, HTLV-I, and HTLV-II.

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Selected References

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