The Eδ enhancer controls the generation of CD4−CD8− αβTCR-expressing T cells that can give rise to different lineages of αβ T cells

نویسندگان

  • Iannis Aifantis
  • Craig H. Bassing
  • Annette I. Garbe
  • Katie Sawai
  • Frederick W. Alt
  • Harald von Boehmer
چکیده

It is well established that the pre-T cell receptor for antigen (TCR) is responsible for efficient expansion and differentiation of thymocytes with productive TCRbeta rearrangements. However, Ptcra- as well as Tcra-targeting experiments have suggested that the early expression of Tcra in CD4- CD8- cells can partially rescue the development of alphabeta CD4+ CD8+ cells in Ptcra-deficient mice. In this study, we show that the TCR E delta but not E alpha enhancer function is required for the cell surface expression of alphabetaTCR on immature CD4- CD8- T cell precursors, which play a crucial role in promoting alphabeta T cell development in the absence of pre-TCR. Thus, alphabetaTCR expression by CD4- CD8- thymocytes not only represents a transgenic artifact but occurs under physiological conditions.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Numerical status of CD4+CD25+FoxP3+ and CD8+CD28- regulatory T cells in multiple sclerosis

Objective(s): Regulatory T cells, including CD4+CD25+Fox3+ and CD8+CD28- cells play an important role in regulating the balance between immunity and tolerance. Since multiple sclerosis is an inflammatory autoimmune disease, regulatory T cells are considered to be involved in its pathogenesis. In this study, we investigated the circulatory numbers of the two mentioned types of regulatory T cells...

متن کامل

Determination of lymphocytes surface markers in patients with thermal burns and the influence of burn size on mononuclear cell subsets

Background: Thermal burn injuries impair the host defence system. Hence, in the present study, we aimed at investigating the changes in the number and phenotype of peripheral blood lymphocyte populations (T, B, and natural killer cells) and their subpopulations in patients with thermal burns and determining the relationships with different sizes of total body surface area (TBSA).    ...

متن کامل

تعیین زیر جمعیت های لنفوسیت T و B و NK بکمک آنتی بادی های مونوکلونال در بیماران مبتلا به بیماری بهجت در ایران

Behcet disease (BD) is a systemic inflammatory disease of the unknown etiology. There is however, some evidence to suggest that immunological abnormalities are important in its pathogenesis, furthermore several T-cell abnormalities which may be quite relevant to autoimmune origin of the disease have been described. We report here our study of T-cell subsets, B and NK cells in 68 patients with B...

متن کامل

Immunophenotype of peripheral blood lymphocytes following thermal injury in patients

AbstractBackgroundcontributes substantially to patient morbidity and mortality.In this study we investigatedthe range and distribution of T-lymphocyte. Subsets CD3helper/inducer cell,.th ), CD8: Severe immunosuppression occurs after large thermal burn and probably+ (T cells) CD4+ (T+ (T suppressor /Cytotoxic cells ,TS/C), CD3+CD4thermal injury.+/CD3+CD8+ ratio, CD19+ (B cells) and CD16+ (NK cel...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • The Journal of Experimental Medicine

دوره 203  شماره 

صفحات  -

تاریخ انتشار 2006