Wynik wyszukiwania w bazie Polska Bibliografia Lekarska GBL

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Tytuł oryginału: CD28 costimulatory molecule - expression, structure and function.
Autorzy: Boćko Dorota, Kosmaczewska Agata, Ciszak Lidia, Teodorowska Renata, Frydecka Irena
Źródło: Arch. Immunol. Ther. Exp. 2002: 50 (3) s.169-177, il., bibliogr. 94 poz.
Sygnatura GBL: 304,223

Hasła klasyfikacyjne GBL:
  • immunologia

    Typ dokumentu:
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • zwierzęta

    Streszczenie angielskie: T cell activation is a key in triggering an antigen specific immune response of the organism. The process is induced primarily by the signal generated by direct interaction of a T cell receptor with an antigen bound to the major histocompatibile complex on an antigen-presenting cell (APC). Although the signal is critical in exciting immune response, an additional, costimulating signal is required. The major second signal is generated by interaction of the CD28 molecule expressed on most T lymphocytes with its natural ligands CD80 and CD86 located on APCs. The signal excited by CD28 triggering involves multiple second-messenger cascades, leading to the activation of transcription factors and finally results in cell proliferation, cytokine production, and the generation of effector functions. The importance of CD28-delivered costimulatory signals was proven in experiments with CD28-deficient mice. T cells from these mice exhibited an impaired pattern of cytokine secretion and defects in T cell-dependent antibody production. Certain forms of immunopathology might result from the aberrant regulation of CD28 expression.

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    Tytuł oryginału: Correlation of blood lymphocyte CTLA-4 (CD152) induction in Hodgkin's disease with proliferative activity, interleukin 2 and interferon-gamma production.
    Autorzy: Kosmaczewksa Agata, Frydecka Irena, Boćko Dorota, Ciszak Lidia, Teodorowska Renata
    Źródło: Br. J. Haematol. 2002: 118 (1) s.202-209, il., tab., bibliogr. s. 207-209
    Sygnatura GBL: 303,964

    Hasła klasyfikacyjne GBL:
  • immunologia
  • hematologia

    Typ dokumentu:
  • tytuł obcojęzyczny
  • praca opublikowana za granicą
  • praca kliniczna

    Wskaźnik treści:
  • ludzie
  • dorośli 19-44 r.ż.
  • dorośli 45-64 r.ż.

    Streszczenie angielskie: Expression of the downregulatory CTLA-4 molecule was determined on unstimulated and anti-CD3+ recombinant interleukin 2 (rIL-2)-stimulated peripheral blood T cells in Hodgkin's disease (HD) and correlated with the T-cells' proliferative activity, IL-2 and interferon (IFN)-gamma production. There was a negligible percentage of CTLA-4+/CD3+ cells before culture. The mean percentage of CTLA-4+/CD3+ lymphocytes increased gradually, peaked after 72 h of stimulation and returned to basal values after 96 h of stimulation. The mean proportion of CTLA-4+/CD3+ cells from untreated patietns was significantly higer after 24, 48 and 72 h of stimulation comppared with controls. The mean percentage of CTLA-4+/CD3+ cells from patietns in clinical remission (CR) was lower than that of untreated patients, but remained significantly higher compared with controls. Lymphocytes from untreated HD patients showed impaired proliferative activity, IL-2 and IFN-gamma production compared with controls. The proliferative activity of the lymphocytes, IL-2 and IFN-gamma production remained significantly lower in CR compared with controls. The proportion of CTLA-4+/CD3+ cells negatively correlated with proliferative activity, IL-2 and IFN-gamma production in HD patients and controls. However, some untreated patients as well as patients in CR with normal mean fluorescence intensity values of CTLA-4 showed unimpaired T-cell function tests. Our study provides the first evidence of an increased expression of downregulatory CTLA-4 molecule on stimulated T-cells in HD, which could be one of the mechanisms of immune deficiency in this disease.

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