Transactivation of interleukin 2 and its receptor induces immune activation in human T-cell lymphotropic virus type I-associated myelopathy: pathogenic implications and a rationale for immunotherapy.
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- C L Tendler
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- S J Greenberg
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- W A Blattner
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- A Manns
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- E Murphy
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- T Fleisher
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- B Hanchard
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- O Morgan
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- J D Burton
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
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- D L Nelson
- Metabolism Branche, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
抄録
<jats:p>A state of T-cell activation, reflected by a marked degree of spontaneous proliferation in vitro, exists among patients with human T-cell lymphotropic virus type I (HTLV-I)-associated myelopathy/tropical spastic paraparesis (HAM/TSP) but not in those with retroviral-induced adult T-cell leukemia (ATL). We wished to define the mechanism by which the immune activation of circulating cells from HAM/TSP is driven, thus gaining insight into the pathogenesis of this HTLV-I-associated disease. By using a modification of the polymerase chain reaction, we compared the levels of interleukin 2 (IL-2) and IL-2 receptor alpha chain (IL-2R alpha) mRNA expression to the transcription of the HTLV-I transactivator gene, pX, in peripheral blood mononuclear cells of HAM/TSP and ATL patients as well as seropositive carriers. Up-regulation of IL-2 and IL-2R alpha transcripts was detected in HAM/TSP and seropositive carriers that paralleled the coordinate mRNA expression of the pX transactivator. In addition, IL-2 and soluble IL-2R alpha serum levels in HAM/TSP and seropositive carriers were elevated. Despite markedly elevated levels of soluble IL-2R alpha in ATL, transcripts for IL-2 and pX were not demonstrable in the circulating cells. Finally, the marked degree of in vitro spontaneous proliferation present in HAM/TSP was profoundly inhibited by specific anti-IL-2R or anti-IL-2 blocking antibodies. Collectively, these results suggest that immune activation in HAM/TSP, in contrast to ATL, is virally driven by the transactivation and coordinate expression of IL-2 and IL-2R alpha. This deregulated autocrine process may contribute to the evolution of inflammatory nervous system damage in HAM/TSP.</jats:p>
収録刊行物
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 87 (13), 5218-5222, 1990-07
Proceedings of the National Academy of Sciences
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詳細情報 詳細情報について
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- CRID
- 1362262944264168064
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- NII論文ID
- 30016287366
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- ISSN
- 10916490
- 00278424
- http://id.crossref.org/issn/00278424
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- Crossref
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