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Human Cell Infection and Host-Pathogen Interaction

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Microbiology".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 987

Special Issue Editor


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Guest Editor
Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, Hufelandstr. 55, 45147 Essen, Germany
Interests: intensive care medicine; host–pathogen interactions; mycology; immunology; invasive fungal disease
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Special Issue Information

Dear Colleagues,

Microbial infections are one of the biggest threats for critically ill patients. They involve a complex interplay between these microorganisms, the environment, and the host. Several efforts have been made to uncover the underlying mechanisms of these infections and to answer the question as to why commensal bacteria or fungi turn intopathogens. Research often focusses on the pathogen side, identifying genetic prototypes responsible for pathogenicity. This view is probably too narrow, since the host's state of immunity plays a pivotal role for the development of severe microbial infections as well. Commensal fungi, such as Candida spp. or Aspergillus spp., can cause life-threatening invasive infections in immunosuppressed patients, whereas immune-competent patients are able to prevent the invasive growth of these commensals. The reason why immunocompetent hosts become susceptible to a former “apathogenic” microorganism during a state of critical illness is not yet fully understood. Therefore, the communication between the host and microbes as well as the interplay between different kinds of microorganisms has to be considered in more detail.

Advancements in the diagnostic workup of these serious diseases could lead to new treatment options and might potentially improve the still devastating outcomes of this vulnerable patient group. Understanding the development and the course of the disease could lead to an improved diagnostic accuracy.

This Special Issue aims to publish high-quality original research, including case reports, reviews, and short communications, concerning up-to-date microbial diagnostic techniques, biomarkers and future molecular imaging techniques such as omics and extracellular vehicles (EVs). We welcome translational research, including immunogenetic risk profiling and pathomechanisms which influence the course of all sorts of microbial infections in human cells (viral, bacterial, fungal and protozoans) and their host–pathogen interactions.

Dr. Simon Dubler
Guest Editor

Manuscript Submission Information

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Keywords

  • immune response
  • host–pathogen interactions
  • virulence factor
  • genome editing
  • mycovirus infection
  • fungal–host interactions
  • new insight
  • -omics
  • pathogens
  • critically ill
  • immunosuppression
  • cellular signalling
  • bacteria
  • virus
  • host

Published Papers (1 paper)

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Research

12 pages, 1796 KiB  
Article
Targeting the Granulocytic Defense against A. fumigatus in Healthy Volunteers and Septic Patients
by Stefanie Michel, Lisa Kirchhoff, Peter-Michael Rath, Jansje Schwab, Karsten Schmidt, Thorsten Brenner and Simon Dubler
Int. J. Mol. Sci. 2023, 24(12), 9911; https://doi.org/10.3390/ijms24129911 - 08 Jun 2023
Viewed by 806
Abstract
Neutrophil granulocytes (NGs) are among the key players in the defense against Aspergillus fumigatus (A. fumigatus). To better elucidate a pathophysiological understanding of their role and functions, we applied a human cell model using NGs from healthy participants and septic patients [...] Read more.
Neutrophil granulocytes (NGs) are among the key players in the defense against Aspergillus fumigatus (A. fumigatus). To better elucidate a pathophysiological understanding of their role and functions, we applied a human cell model using NGs from healthy participants and septic patients to evaluate their inhibitory effects on the growth of A. fumigatus ex vivo. Conidia of A. fumigatus (ATCC® 204305) were co-incubated with NGs from healthy volunteers or septic patients for 16 h. A. fumigatus growth was measured by XTT assays with a plate reader. The inhibitory effect of NGs on 18 healthy volunteers revealed great heterogeneity. Additionally, growth inhibition was significantly stronger in the afternoon than the morning, due to potentially different cortisol levels. It is particularly interesting that the inhibitory effect of NGs was reduced in patients with sepsis compared to healthy controls. In addition, the magnitude of the NG-driven defense against A. fumigatus was highly variable among healthy volunteers. Moreover, daytime and corresponding cortisol levels also seem to have a strong influence. Most interestingly, preliminary experiments with NGs from septic patients point to a strongly diminished granulocytic defense against Aspergillus spp. Full article
(This article belongs to the Special Issue Human Cell Infection and Host-Pathogen Interaction)
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