Search anything and hit enter
  • Teams
  • Members
  • Projects
  • Events
  • Calls
  • Jobs
  • publications
  • Software
  • Tools
  • Network
  • Equipment

A little guide for advanced search:

  • Tip 1. You can use quotes "" to search for an exact expression.
    Example: "cell division"
  • Tip 2. You can use + symbol to restrict results containing all words.
    Example: +cell +stem
  • Tip 3. You can use + and - symbols to force inclusion or exclusion of specific words.
    Example: +cell -stem
e.g. searching for members in projects tagged cancer
Search for
Count
IN
OUT
Content 1
  • member
  • team
  • department
  • center
  • program_project
  • nrc
  • whocc
  • project
  • software
  • tool
  • patent
  • Administrative Staff
  • Assistant Professor
  • Associate Professor
  • Clinical Research Assistant
  • Clinical Research Nurse
  • Clinician Researcher
  • Department Manager
  • Dual-education Student
  • Full Professor
  • Honorary Professor
  • Lab assistant
  • Master Student
  • Non-permanent Researcher
  • Nursing Staff
  • Permanent Researcher
  • Pharmacist
  • PhD Student
  • Physician
  • Post-doc
  • Prize
  • Project Manager
  • Research Associate
  • Research Engineer
  • Retired scientist
  • Technician
  • Undergraduate Student
  • Veterinary
  • Visiting Scientist
  • Deputy Director of Center
  • Deputy Director of Department
  • Deputy Director of National Reference Center
  • Deputy Head of Facility
  • Director of Center
  • Director of Department
  • Director of Institute
  • Director of National Reference Center
  • Group Leader
  • Head of Facility
  • Head of Operations
  • Head of Structure
  • Honorary President of the Departement
  • Labex Coordinator
Content 2
  • member
  • team
  • department
  • center
  • program_project
  • nrc
  • whocc
  • project
  • software
  • tool
  • patent
  • Administrative Staff
  • Assistant Professor
  • Associate Professor
  • Clinical Research Assistant
  • Clinical Research Nurse
  • Clinician Researcher
  • Department Manager
  • Dual-education Student
  • Full Professor
  • Honorary Professor
  • Lab assistant
  • Master Student
  • Non-permanent Researcher
  • Nursing Staff
  • Permanent Researcher
  • Pharmacist
  • PhD Student
  • Physician
  • Post-doc
  • Prize
  • Project Manager
  • Research Associate
  • Research Engineer
  • Retired scientist
  • Technician
  • Undergraduate Student
  • Veterinary
  • Visiting Scientist
  • Deputy Director of Center
  • Deputy Director of Department
  • Deputy Director of National Reference Center
  • Deputy Head of Facility
  • Director of Center
  • Director of Department
  • Director of Institute
  • Director of National Reference Center
  • Group Leader
  • Head of Facility
  • Head of Operations
  • Head of Structure
  • Honorary President of the Departement
  • Labex Coordinator
Search

← Go to Research

Go back
Scroll to top
Share
© Research
Publication : European journal of immunology

Cellular competition modulates survival and selection of CD8+ T cells

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in European journal of immunology - 01 Nov 1996

Freitas AA, Agenes F, Coutinho GC

Link to Pubmed [PMID] – 8921950

Eur. J. Immunol. 1996 Nov;26(11):2640-9

In this investigation we compare the repopulation of the CD8+ T cell compartments of bone marrow (BM) chimeras by either normal nontransgenic or T cell receptor (TcR) alpha beta-transgenic (TG) CD8+ T cells, the fate of TG and non-TG CD8+ T cells in different parabionts and the survival of TG and non-TG peripheral CD8+ T cells after transfer into athymic hosts. We found that cellular competition among CD8 T cells occurs at several steps of T cell differentiation including a) during the DN to DP transition, b) positive selection in the thymus, c) export from the thymus and d) in the periphery. Comparison of the results obtained in the BM chimeras and in the parabionts shows that an important step of T cell selection occurs during seeding of peripheral lymphoid tissues. Once established, peripheral T cells resist replacement by recent thymus migrants, i.e. in the periphery, selection of T cell repertoires follows the rule “first come, first served”. Peripheral dominance correlates with T cell activation and division. Cell cycling and CD44 expression are more frequent among non-TG CD8 T cells than TG CD8 T cells and within the latter, more frequent among P14 TG CD8 T cells than anti-HYTG CD8 T cells. Thus, in the absence of intentional immunization, the frequencies of CD8+ T cells follow a hierarchy of selection in which non-TG > or = P14 TG > anti-HY TG. We also show that the equilibrium size and the fate of one CD8 T cell population differs according to the presence or absence of other CD8 T cell populations. Under these circumstances, selection of T cell repertoires and T cell survival and memory rely not only on the interactions of each T cell with their respective ligands, but also on the nature and number of other competing cells.