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    Expression of Id2 and Id3 mRNA in human lymphocytes.

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    Authors
    Ishiguro, A
    Spirin, K
    Shiohara, M
    Tobler, A
    Norton, John D
    Rigolet, M
    Shimbo, T
    Koeffler, H P
    Affiliation
    Department of Medicine, Cedars-Sinai Medical Center, UCLA School of Medicine 90048, USA.
    Issue Date
    1995-12
    
    Metadata
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    Abstract
    Helix-loop-helix (HLH) transcription factors are involved in cellular growth and differentiation. The Id (inhibitor of DNA binding and differentiation) HLH proteins, in a dominantly negative fashion, regulate transcriptional activities of basic HLH proteins. We examined by northern hybridization the expression of Id2 and Id3 mRNA in human leukemia/lymphoma lines and patient samples, as well as resting and activated normal human lymphocytes from peripheral blood (PBL). The Id2 mRNA was abundantly expressed in 5/12 T-cell and 3/4 B-cell lines, and Id3 mRNA was detected in 4/12 T-cell and 3/4 B-cell lines. Interestingly, Id2, but not Id3, mRNA was strongly expressed in 4/5 T-cell lines infected with human T-cell leukemia virus type I (HTLV-I) (ATL-1k, MT-2, S-LB1) and type II (Mo). Another unexpected finding was that T-cell leukemias and T-cell lines often expressed either Id2 or Id3 mRNA. In addition, resting PBL constitutively expressed prominent levels of Id2 mRNA, but not Id3 mRNA. Upon PHA-stimulation, Id2 expression decreased and Id3 levels increased with biphasic kinetics. Taken together, our studies revealed three unexpected findings which require further analysis: (1) expression of Id2 mRNA is often associated with lymphocytic transformation by HTLV-I or -II; (2) T-cells usually express either Id2 or Id3 mRNA, but B-cells often express both simultaneously; (3) non-dividing, normal PBL express high levels of Id2 and no Id3 mRNA; and with the onset of cellular proliferation, levels of Id2 mRNA decrease while levels of Id3 mRNA increase, suggesting that regulation of expression of these closely related genes is disparate.
    Citation
    Expression of Id2 and Id3 mRNA in human lymphocytes. 1995, 19 (12):989-96 Leuk. Res.
    Journal
    Leukemia Research
    URI
    http://hdl.handle.net/10541/97751
    DOI
    10.1016/0145-2126(95)00084-4
    PubMed ID
    8632670
    Type
    Article
    Language
    en
    ISSN
    0145-2126
    ae974a485f413a2113503eed53cd6c53
    10.1016/0145-2126(95)00084-4
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research

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