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Table 1 Response of NK cells to TLR agonists and other RAMPs.

From: Natural Killer (NK) Cells in Antibacterial Innate Immunity: Angels or Devils?

Bacteria or bacterial RAMPs

PRRs

Experimental settings

Species

Nature of NK cell activation

Reference

Legionella pneumophila

ND

MØ or IL-2

m

Cytotoxicity, IFN-γ production

Blanchard et al. Infect Immun., 1988, 56, 1187a

LPS

ND

PBMC

h

Cytotoxicity

Conti et al. J. Immunol. 1991, 73, 450

S. aureus

ND

PBMC

h

CD25 and CD69 expression, IFN-γ production

Yoshihara et al. Infect. Immun. 1993, 61, 3117

L. monocytogenes

ND

SCID splenocytes + peritoneal MØ

m

IFN-γ production

Tripp et al. PNAS 1993, 90, 3725

Mycobacterium bovis BCG

ND

Spleen cells

m

IFN-γ production

Yang et al. J. Immunol. 1995, 155, 5728

E. coli DNA

ND

in vivo

m

IFN-γ production

Cowdery et al. J. Immunol. 1996, 156, 4570

E. coli DNA

ND

+ MØ or IL-12

m

IFN-γ production

Chace et al. Clin. Immunol. Immunopathol. 1997, 84, 185

LPS

ND

in vivo

m

IFN-γ production

Nguyen et al. J. Immunol. 1999, 162, 5238

E. coli, Lactobacillus

ND

+ MØ

h

CD25 and CD69 expression, IFN-γ production, proliferation

Haller et al. Infect. Immun. 2000, 68, 752

CgG oligonucleotide

TLR9

pDC or pDC supernatant

h

CD69 expression

Hornung et al. J. Immunol. 2002, 168, 4531

Poly(I:C)

TLR3

IL-2 or IL-12

h

Cytotoxicity, CXCL10 and IFN-γ production

Pisegna et al. Blood. 2004, 104, 4157

K, pneumoniae OmpA, flagellin

TLR2 and TLR5

± IL-1, IL-2, IL-12, IL-15, IFN-α

h

IFN-γ and α-defensin production

Chalifur et al. Blood. 2004, 104, 1778

Poly(I:C) and CpG

TLR3 and TLR9

+ IL-12 or IL-8

h

CD69 and CD25 expression, cytotoxity, IFN-γ and TNF production

Sivori et al. PNAS. 2004, 101, 10116

L. monocytogenes

ND

in vivo

m

IFN-γ production

Thäle et al. Immunobiology. 2005, 210, 673

H. pylori lysates

ND

IL-12

h

IFN-γ production

Yun et al. Infect. Immun. 2005, 73, 1482

Flagellin

ND

in vivo, in vitro ± DC

m

CD69 expression, IFN-γ production proliferation

Tsujimoto et al. J. Leuk. Biol. 2005, 78, 888

Secreted mycobacterial (proteins ESAT-6 and MPP14)

ND

Bovine whole blood or PBMC

b

IFN-γ production

Olsen et al. Infect. Immun. 2005, 73, 5628

Peptidoglycan, poly(I:C) LPS, flagellin

TLR2, -3, -4, -5

IL-2

h

IFN-γ production and cytotoxity

Lauzon et al. Cell. Immunol. 2006, 241, 102

Lactobacillus casei

ND

+ MØ or IL-12

h

Cytotoxicity

Takeda et al. Clin. Exp. Immunol. 2006, 146, 109

Poly(I:C), Ioxoribine

TLR3 and TLR7

IL-12

h

IFN-γ production and cytotoxity

Girart et al. J. Immunol. 2007, 179, 3472

Peptidoglycan, poly(I:C) (Ioxoribine)

TLR2, -3 and -7

IL-12

m

IFN-γ production and cytotoxity

Sawaki et al. Int. Immunol. 2007, 19, 311

M. tuberculosis

TLR2 + TLR4

IL-12 + APC contact

h

IFN-γ production

Schierloh et al. Infect. Immun. 2007, 75, 5325

M. bovis

TLR2

± IL-12

h

CD69 and CD25 expression, IFN-γ and TNF production

Marcenaro et al. Int. Immunol. 2008, 20, 1155

MDP

NOD2

IL-12 or IFN-α

h

CD69 expression, IFN-γ production

Athie-Morales et al. J. Immunol. 2010, 185, 2080

CgG oligonucleotide

TLR9

Infected MØ

m

Control of intracellular bacterial growth

Elkins et al. Microbes Infect. 2009, 11, 49

Poly(I:C)

RIG-like receptor not TLR3

IL-12 and IFN-γ

h

IFN-γ production and cytotoxity

Perrot et al. J. Immunol. 2010, 185, 1379

E. coli Fimbriae FimH

TLR4 agonist

IL-2

m and h

CD69 expression, cytotoxity and IFN-γ production

Mian et al. Mol. Ther. 2010, 18, 1379

H. pylori (HpaA lipoprotein)

TLR2

IL-12

h

IFN-γ production

Lindgren et al. Innate Immun. 2010, 17, 191

Diacyl lipopeptide

TLR2

+ BMDC contact

m

IFN-γ production and cytotoxity

Azuma et al. PLoS One. 2010, 5, e12550

Lactobacillus acidophilus

ND

PBMC

h

Cytotoxicity and granule exocytosis

Cheon et al. Immunol. Lett. 2011, 136, 171

  1. ND, not determined; PBMC, human peripheral blood mononuclear cells; MØ, monocytes or macrophages; pDC, plasmacytoid dendritic cells; APC, antigen presenting cells; BMDC, bone marrow derived dendritic cells; b, bovine; h, human; m, murine.
  2. aThe second number in each reference citation indicates the volume; the last number indicates the beginning page number.