Abstract
Salmonella typhimurium causes a localized enteric infection in immunocompetent individuals, whereas HIV-infected individuals develop a life-threatening bacteremia. Here we show that simian immunodeficiency virus (SIV) infection results in depletion of T helper type 17 (TH17) cells in the ileal mucosa of rhesus macaques, thereby impairing mucosal barrier functions to S. typhimurium dissemination. In SIV-negative macaques, the gene expression profile induced by S. typhimurium in ligated ileal loops was dominated by TH17 responses, including the expression of interleukin-17 (IL-17) and IL-22. TH17 cells were markedly depleted in SIV-infected rhesus macaques, resulting in blunted TH17 responses to S. typhimurium infection and increased bacterial dissemination. IL-17 receptor–deficient mice showed increased systemic dissemination of S. typhimurium from the gut, suggesting that IL-17 deficiency causes defects in mucosal barrier function. We conclude that SIV infection impairs the IL-17 axis, an arm of the mucosal immune response preventing systemic microbial dissemination from the gastrointestinal tract.
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Zhang, S. et al. Molecular pathogenesis of Salmonella enterica serotype typhimurium–induced diarrhea. Infect. Immun. 71, 1–12 (2003).
Hohmann, E.L. Nontyphoidal salmonellosis. Clin. Infect. Dis. 32, 263–269 (2001).
Gordon, M.A. et al. Bacteraemia and mortality among adult medical admissions in Malawi-predominance of non-typhi salmonellae and Streptococcus pneumoniae. J. Infect. 42, 44–49 (2001).
Alausa, K.O. et al. Septicaemia in the tropics. A prospective epidemiological study of 146 patients with a high case fatality rate. Scand. J. Infect. Dis. 9, 181–185 (1977).
Kankwatira, A.M., Mwafulirwa, G.A. & Gordon, M.A. Non-typhoidal salmonella bacteraemia—an under-recognized feature of AIDS in African adults. Trop. Doct. 34, 198–200 (2004).
Gordon, M.A. et al. Non-typhoidal salmonella bacteraemia among HIV-infected Malawian adults: high mortality and frequent recrudescence. AIDS 16, 1633–1641 (2002).
Zhang, S. et al. The Salmonella enterica serotype typhimurium effector proteins SipA, SopA, SopB, SopD, and SopE2 act in concert to induce diarrhea in calves. Infect. Immun. 70, 3843–3855 (2002).
Reis, B.P. et al. The attenuated sopB mutant of Salmonella enterica serovar typhimurium has the same tissue distribution and host chemokine response as the wild type in bovine Peyer's patches. Vet. Microbiol. 97, 269–277 (2003).
Santos, R.L., Zhang, S., Tsolis, R.M., Bäumler, A.J. & Adams, L.G. Morphologic and molecular characterization of Salmonella typhimurium infection in neonatal calves. Vet. Pathol. 39, 200–215 (2002).
Nau, G.J., Schlesinger, A., Richmond, J.F. & Young, R.A. Cumulative Toll-like receptor activation in human macrophages treated with whole bacteria. J. Immunol. 170, 5203–5209 (2003).
Kent, T.H., Formal, S.B. & Labrec, E.H. Salmonella gastroenteritis in rhesus monkeys. Arch. Pathol. 82, 272–279 (1966).
Daniel, M.D. et al. Simian models for AIDS. Cancer Detect. Prev. Suppl. 1, 501–507 (1987).
Ziesche, E., Bachmann, M., Kleinert, H., Pfeilschifter, J. & Muhl, H. The interleukin-22/STAT3 pathway potentiates expression of inducible nitric-oxide synthase in human colon carcinoma cells. J. Biol. Chem. 282, 16006–16015 (2007).
Shen, F., Ruddy, M.J., Plamondon, P. & Gaffen, S.L. Cytokines link osteoblasts and inflammation: microarray analysis of interleukin-17– and TNF-α–induced genes in bone cells. J. Leukoc. Biol. 77, 388–399 (2005).
Kao, C.Y. et al. Up-regulation of CC chemokine ligand 20 expression in human airway epithelium by IL-17 through a JAK-independent but MEK/NF-κB-dependent signaling pathway. J. Immunol. 175, 6676–6685 (2005).
Laan, M. et al. Neutrophil recruitment by human IL-17 via C-X-C chemokine release in the airways. J. Immunol. 162, 2347–2352 (1999).
Ogawa, A., Andoh, A., Araki, Y., Bamba, T. & Fujiyama, Y. Neutralization of interleukin-17 aggravates dextran sulfate sodium–induced colitis in mice. Clin. Immunol. 110, 55–62 (2004).
Liang, S.C. et al. Interleukin (IL)-22 and IL-17 are coexpressed by TH17 cells and cooperatively enhance expression of antimicrobial peptides. J. Exp. Med. 203, 2271–2279 (2006).
Harrington, L.E. et al. Interleukin 17–producing CD4+ effector T cells develop via a lineage distinct from the T helper type 1 and 2 lineages. Nat. Immunol. 6, 1123–1132 (2005).
Park, H. et al. A distinct lineage of CD4 T cells regulates tissue inflammation by producing interleukin 17. Nat. Immunol. 6, 1133–1141 (2005).
Zeng, H. et al. Flagellin is the major proinflammatory determinant of enteropathogenic Salmonella. J. Immunol. 171, 3668–3674 (2003).
Thamlikitkul, V., Dhiraputra, C., Paisarnsinsup, T. & Chareandee, C. Non-typhoidal Salmonella bacteraemia: clinical features and risk factors. Trop. Med. Int. Health 1, 443–448 (1996).
Sankaran, S. et al. Rapid onset of intestinal epithelial barrier dysfunction in primary human immunodeficiency virus infection is driven by an imbalance between immune response and mucosal repair and regeneration. J. Virol. 82, 538–545 (2008).
Heise, C., Miller, C.J., Lackner, A. & Dandekar, S. Primary acute simian immunodeficiency virus infection of intestinal lymphoid tissue is associated with gastrointestinal dysfunction. J. Infect. Dis. 169, 1116–1120 (1994).
Mehandru, S. et al. Primary HIV-1 infection is associated with preferential depletion of CD4+ T lymphocytes from effector sites in the gastrointestinal tract. J. Exp. Med. 200, 761–770 (2004).
Smit-McBride, Z., Mattapallil, J.J., McChesney, M., Ferrick, D. & Dandekar, S. Gastrointestinal T lymphocytes retain high potential for cytokine responses but have severe CD4+ T-cell depletion at all stages of simian immunodeficiency virus infection compared to peripheral lymphocytes. J. Virol. 72, 6646–6656 (1998).
Veazey, R.S. et al. Gastrointestinal tract as a major site of CD4+ T cell depletion and viral replication in SIV infection. Science 280, 427–431 (1998).
Mattapallil, J.J. et al. Massive infection and loss of memory CD4+ T cells in multiple tissues during acute SIV infection. Nature 434, 1093–1097 (2005).
Barthel, M. et al. Pretreatment of mice with streptomycin provides a Salmonella enterica serovar typhimurium colitis model that allows analysis of both pathogen and host. Infect. Immun. 71, 2839–2858 (2003).
Raffatellu, M. et al. The capsule-encoding viaB locus reduces IL-17 expression and mucosal innate responses in the bovine intestinal mucosa during infection with Salmonella enterica serotype typhi. Infect. Immun. 75, 4342–4350 (2007).
Happel, K.I. et al. Divergent roles of IL-23 and IL-12 in host defense against Klebsiella pneumoniae. J. Exp. Med. 202, 761–769 (2005).
Happel, K.I. et al. Cutting edge: roles of Toll-like receptor 4 and IL-23 in IL-17 expression in response to Klebsiella pneumoniae infection. J. Immunol. 170, 4432–4436 (2003).
Zheng, Y. et al. Interleukin-22, a TH17 cytokine, mediates IL-23–induced dermal inflammation and acanthosis. Nature 445, 648–651 (2007).
Umemura, M. et al. IL-17–mediated regulation of innate and acquired immune response against pulmonary Mycobacterium bovis bacille Calmette-Guerin infection. J. Immunol. 178, 3786–3796 (2007).
Bernstein, L.J., Krieger, B.Z., Novick, B., Sicklick, M.J. & Rubinstein, A. Bacterial infection in the acquired immunodeficiency syndrome of children. Pediatr. Infect. Dis. 4, 472–475 (1985).
Eng, R.H., Bishburg, E., Smith, S.M., Geller, H. & Kapila, R. Bacteremia and fungemia in patients with acquired immune deficiency syndrome. Am. J. Clin. Pathol. 86, 105–107 (1986).
Gilks, C.F. et al. Life-threatening bacteraemia in HIV-1 seropositive adults admitted to hospital in Nairobi, Kenya. Lancet 336, 545–549 (1990).
Brenchley, J.M. et al. Microbial translocation is a cause of systemic immune activation in chronic HIV infection. Nat. Med. 12, 1365–1371 (2006).
Kao, C.Y. et al. IL-17 markedly up-regulates β-defensin-2 expression in human airway epithelium via JAK and NF-κB signaling pathways. J. Immunol. 173, 3482–3491 (2004).
Brand, S. et al. IL-22 is increased in active Crohn's disease and promotes proinflammatory gene expression and intestinal epithelial cell migration. Am. J. Physiol. Gastrointest. Liver Physiol. 290, G827–G838 (2006).
Schwartz, S., Beaulieu, J.F. & Ruemmele, F.M. Interleukin-17 is a potent immuno-modulator and regulator of normal human intestinal epithelial cell growth. Biochem. Biophys. Res. Commun. 337, 505–509 (2005).
Andoh, A. et al. Interleukin-22, a member of the IL-10 subfamily, induces inflammatory responses in colonic subepithelial myofibroblasts. Gastroenterology 129, 969–984 (2005).
Ye, P. et al. Requirement of interleukin 17 receptor signaling for lung CXC chemokine and granulocyte colony–stimulating factor expression, neutrophil recruitment, and host defense. J. Exp. Med. 194, 519–527 (2001).
Coffey, M.J., Phare, S.M., George, S., Peters-Golden, M. & Kazanjian, P.H. Granulocyte colony–stimulating factor administration to HIV-infected subjects augments reduced leukotriene synthesis and anticryptococcal activity in neutrophils. J. Clin. Invest. 102, 663–670 (1998).
Pitrak, D.L. Neutrophil deficiency and dysfunction in HIV-infected patients. Am. J. Health Syst. Pharm. 56 Suppl 5, S9–S16 (1999).
George, S. et al. Neutrophils from AIDS patients treated with granulocyte colony–stimulating factor demonstrate enhanced killing of Mycobacterium avium. J. Infect. Dis. 178, 1530–1533 (1998).
Pitrak, D.L. Filgrastim treatment of HIV-infected patients improves neutrophil function. AIDS 13 Suppl 2, S25–S30 (1999).
Karim, M., Khan, W., Farooqi, B. & Malik, I. Bacterial isolates in neutropenic febrile patients. J. Pak. Med. Assoc. 41, 35–37 (1991).
George, M.D., Sankaran, S., Reay, E., Gelli, A.C. & Dandekar, S. High-throughput gene expression profiling indicates dysregulation of intestinal cell cycle mediators and growth factors during primary simian immunodeficiency virus infection. Virology 312, 84–94 (2003).
Acknowledgements
We would like to thank C. Bevins and R. Tsolis for helpful suggestions to improve the manuscript. We would like to thank E. Reay and L. Hirst for their invaluable help in coordinating the macaque studies and Taconic Corporation for providing Il17ra−/− mice for this study.
Work in A.J.B.'s laboratory was supported by US Public Health Service grants AI040124, AI044170 and AI065534. Work in S.D.'s laboratory was supported by US Public Health Service grants DK43183, DK61297 and AI43274. T.A.P. and R.L.S. were supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil. R.L.S. was supported by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brazil. I.G. was supported by Public Health Service grant AI06055.
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Raffatellu, M., Santos, R., Verhoeven, D. et al. Simian immunodeficiency virus–induced mucosal interleukin-17 deficiency promotes Salmonella dissemination from the gut. Nat Med 14, 421–428 (2008). https://doi.org/10.1038/nm1743
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DOI: https://doi.org/10.1038/nm1743