Unveil the transcriptional landscape at the Cryptococcus-host axis in mice and nonhuman primates

PLoS Negl Trop Dis. 2019 Jul 22;13(7):e0007566. doi: 10.1371/journal.pntd.0007566. eCollection 2019 Jul.

Abstract

Pathogens and hosts require rapid modulation of virulence and defense mechanisms at the infection axis, but monitoring such modulations is challenging. In studying the human fungal pathogen Cryptococcus neoformans, mouse and rabbit infection models are often employed to shed light on the disease mechanisms but that may not be clinically relevant. In this study, we developed an animal infection model using the non-human primate cynomolgus monkey Macaca fascicularis. In addition, we systematically profiled and compared transcriptional responses between the infected mice and the cynomolgus monkey, using simultaneous or dual RNA next-generation sequencing. We demonstrated that there are shared but distinct transcriptional profiles between the two models following C. neoformans infection. Specifically, genes involved in immune and inflammatory responses are all upregulated. Osteoclastogenesis and insulin signaling are also significantly co-regulated in both models and disrupting an osteoclastogenesis-associated gene (OC-STAMP) or the insulin-signaling process significantly altered the host tolerance to C. neoformans. Moreover, C. neoformans was shown to activate metal sequestration, dampen the sugar metabolism, and control cell morphology during infection. Taking together, we described the development of a non-human primate model of cryptococcosis that allowed us to perform an in-depth analysis and comparison of transcriptome profiles during infections of two animal models and conceptually identify host genes important in disease responses. This study provides new insights in understanding fungal pathogenesis mechanisms that potentially facilitate the identification of novel drug targets for the treatment of cryptococcal infection.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cryptococcosis / genetics*
  • Cryptococcosis / immunology
  • Cryptococcosis / microbiology
  • Cryptococcus neoformans* / genetics
  • Cryptococcus neoformans* / immunology
  • Cryptococcus neoformans* / pathogenicity
  • Disease Models, Animal
  • Gene Expression Profiling*
  • Insulin / metabolism
  • Lung Diseases, Fungal / genetics*
  • Lung Diseases, Fungal / immunology
  • Lung Diseases, Fungal / microbiology
  • Macaca fascicularis
  • Male
  • Membrane Proteins / metabolism
  • Metals / metabolism
  • Mice
  • Mice, Inbred C57BL
  • Osteogenesis
  • Sequence Analysis, RNA
  • Signal Transduction
  • Virulence / genetics

Substances

  • Insulin
  • Membrane Proteins
  • Metals
  • OC-STAMP protein, mouse

Grants and funding

This research was supported by the National Natural Science Foundation of China (31300974 and 31870140 to CD, 81600941 to MZ), the Fundamental Research Funds for Central Universities of China (N142005001 and N172002001 to CD), Liaoning Revitalization Talents Program (XLYC1807001) and Shenyang high-level innovative talents program (RC180347). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.