Functional genomics of innate host defense molecules in normal human monocytes in response to Aspergillus fumigatus

Karoll J. Cortez, Caron A. Lyman, Shyam Kottilil, Hee Sup Kim, Emmanuel Roilides, Jun Yang, Brandie Fullmer, Richard Lempicki, Thomas J. Walsh

Research output: Contribution to journalArticle

Abstract

Aspergillus fumigatus induces the release of innate immune-related molecules from phagocytic cells early in the course of infection. Little is known, however, about the complex expression profiles of the multiple genes involved in this response. We therefore investigated the kinetics of early gene expression in human monocytes (HMCs) infected with conidia of A. fumigatus using DNA microarray analysis. Total RNA from HMCs at 0, 2, 4, and 6 h was extracted, linearly amplified, hybridized onto Affymetrix HG133 Plus 2.0 gene chips, and analyzed with an Affymetrix scanner. Changes in gene expression were calculated as a ratio of those expressed by infected versus control HMCs. Aspergillus fumigatus induced differential regulation of expression in 1,827 genes (P < 0.05). Genes encoding cytokines and chemokines involved in host defense against A. fumigatus, including interleukin-1β (IL-1β), IL-8, CXCL2, CCL4, CCL3, and CCL20, as well as the opsonin long pentraxin 3, were up-regulated during the first 2 to 6 h, coinciding with an increase in phagocytosis. Simultaneously, genes encoding CD14, ficolin1, and MARCO were down-regulated, and genes encoding IL-10 and matrix metalloproteinase 1 were up-regulated. Up-regulation of the genes encoding heat shock proteins 40 and 110 and connexins 26 and 30 may point to novel molecules whose role in the pathogenesis of aspergillosis has not been previously reported. Verification of the transcriptional profiling was obtained for selected genes by reverse transcription-PCR and enzyme immunoassay. Thus, A. fumigatus conidia induced a coordinated expression of genes important in host defense and immunomodulation.

Original languageEnglish (US)
Pages (from-to)2353-2365
Number of pages13
JournalInfection and immunity
Volume74
Issue number4
DOIs
StatePublished - Apr 1 2006

ASJC Scopus subject areas

  • Parasitology
  • Microbiology
  • Immunology
  • Infectious Diseases

Fingerprint Dive into the research topics of 'Functional genomics of innate host defense molecules in normal human monocytes in response to Aspergillus fumigatus'. Together they form a unique fingerprint.

  • Cite this

    Cortez, K. J., Lyman, C. A., Kottilil, S., Kim, H. S., Roilides, E., Yang, J., Fullmer, B., Lempicki, R., & Walsh, T. J. (2006). Functional genomics of innate host defense molecules in normal human monocytes in response to Aspergillus fumigatus. Infection and immunity, 74(4), 2353-2365. https://doi.org/10.1128/IAI.74.4.2353-2365.2006