What question did this study set out to answer?

To determine whether supramolecular activation clusters form and are required during the activation of fresh ex vivo CD8+ T cells by antigen-presenting cells.

October 16, 2001Proceedings of the National Academy of SciencesOpen Access

Formation of supramolecular activation clusters on fresh ex vivo CD8 ⁺ T cells after engagement of the T cell antigen receptor and CD8 by antigen-presenting cells

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Authors

TPTerry A. PotterMerck & Co., Inc., Rahway, NJ, USA (United States)KGKristie M. GrebeThe Navigator (Portugal)BFBen FreibergNational Jewish Health

Discussion

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Implication

Microscopy study demonstrates that supramolecular activation cluster formation requires CD8 coreceptors in mouse CD8+ T cells, indicating distinct activation mechanics from CD4+ cells.

Key Points

To determine whether supramolecular activation clusters form and are required during the activation of fresh ex vivo CD8+ T cells by antigen-presenting cells.
Evaluated conjugate formation between fresh ex vivo CD8+ T cells from OT-1 transgenic mice and SIINFEKL-pulsed antigen-presenting cells using three-dimensional digital microscopy.
Tested T-cell responses across varying peptide concentrations and with antigen-presenting cells expressing CD8-binding-deficient mutant H-2K(b) (Lys227) molecules.
Minimal peptide concentrations sufficient for proliferation and IFN-gamma production concentrated PKC-theta in central SMACs and segregated LFA-1 and talin into peripheral SMACs, whereas sub-threshold peptide concentrations eliminated SMAC formation.
Disruption of CD8 coreceptor binding using mutant H-2K(b) (Lys227) molecules prevented stable cell conjugate formation and SMAC assembly even at elevated peptide concentrations.

Cite This Study

Potter et al. (2001) studied this question.

synapsesocial.com/papers/6a0da781cae7912d2fa52834 https://doi.org/10.1073/pnas.221458898

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Implication

Microscopy study demonstrates that supramolecular activation cluster formation requires CD8 coreceptors in mouse CD8+ T cells, indicating distinct activation mechanics from CD4+ cells.

Formation of supramolecular activation clusters on fresh ex vivo CD8 ⁺ T cells after engagement of the T cell antigen receptor and CD8 by antigen-presenting cells

Discussion

Member takes

Implication

Key Points

Cite This Study

Formation of supramolecular activation clusters on fresh ex vivo CD8 ⁺ T cells after engagement of the T cell antigen receptor and CD8 by antigen-presenting cells

Discussion

Member takes

Implication

Key Points

Cite This Study

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