NK cells provide helper signal for CD8+ T cells by inducing the expression of membrane-bound IL-15 on DCs

Barbara Morandi, Lorenzo Mortara, Paolo Carrega, Claudia Cantoni, Gregorio Costa, Roberto S. Accolla, Maria Cristina Mingari, Silvano Ferrini, Lorenzo Moretta, Guido Ferlazzo

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

NK cell recognition of cells that do not express or express low amounts of MHC class I molecules results not only in direct killing of target cells but also in the generation of specific T cell responses consequent to the induction of dendritic cell (DC) activation. While IL-12 production by NK cell-activated DCs is generally thought to play a critical role, a similar DC-mediated NK cell help has been reported also in IL-12-knockout mice. Here, we show that human NK cells can induce on DC surface membrane, via IFN-γ secretion, the expression of high levels of IL-15. Remarkably, we show that DC expression of this membrane-bound form of IL-15, which is only partially associated with IL-15R molecules, is essential to promote specific CD8+ T lymphocyte response in the absence of DC-derived IL-12.

Original languageEnglish
Pages (from-to)599-606
Number of pages8
JournalInternational Immunology
Volume21
Issue number5
DOIs
Publication statusPublished - 2009

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Interleukin-15
Natural Killer Cells
Dendritic Cells
T-Lymphocytes
Interleukin-12
Membranes
Cell Membrane
Knockout Mice

Keywords

  • CD8 lymphocytes
  • Dendritic cells
  • IL-15 receptor alpha
  • Membrane-bound IL-15
  • NK cells

ASJC Scopus subject areas

  • Immunology

Cite this

NK cells provide helper signal for CD8+ T cells by inducing the expression of membrane-bound IL-15 on DCs. / Morandi, Barbara; Mortara, Lorenzo; Carrega, Paolo; Cantoni, Claudia; Costa, Gregorio; Accolla, Roberto S.; Mingari, Maria Cristina; Ferrini, Silvano; Moretta, Lorenzo; Ferlazzo, Guido.

In: International Immunology, Vol. 21, No. 5, 2009, p. 599-606.

Research output: Contribution to journalArticle

Morandi, Barbara ; Mortara, Lorenzo ; Carrega, Paolo ; Cantoni, Claudia ; Costa, Gregorio ; Accolla, Roberto S. ; Mingari, Maria Cristina ; Ferrini, Silvano ; Moretta, Lorenzo ; Ferlazzo, Guido. / NK cells provide helper signal for CD8+ T cells by inducing the expression of membrane-bound IL-15 on DCs. In: International Immunology. 2009 ; Vol. 21, No. 5. pp. 599-606.
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AU - Costa, Gregorio

AU - Accolla, Roberto S.

AU - Mingari, Maria Cristina

AU - Ferrini, Silvano

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AU - Ferlazzo, Guido

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