Research area
Microbiology and infectious diseases
Research area
Microbiology and infectious diseases

MOLECULAR BIOLOGY OF EMERGING VIRUSES

Research

Bunyaviruses constitute the largest group of RNA viruses. Although they encode only a small number of proteins, these viruses can cause a wide range of diseases in humans and animals, including severe hemorrhagic fevers. Several, such as Junín virus (JUNV, family Arenaviridae), Andes virus (ANDV, family Hantaviridae), and Oropouche virus (OROV, family Peribunyaviridae), are endemic to South America. The lack of effective preventive or therapeutic treatments underscores the urgency of studying these pathogens.
The Dieterle Lab seeks to determine how bunyavirus replication machinery functions with the ultimate goal of targeting newly uncovered vulnerabilities through antiviral therapies. We are currently (i) identifying trans-activating molecules and cis-acting genomic elements that influence transcription and translation (ii) developing monoclonal antibodies targeting viral proteins that can be turned into antiviral countermeasures.

Skills & tools

To understand viral replication and its interactions with the host, our lab employs a multidisciplinary approach combining virology, molecular biology, genomics, and proteomics. We use virus models such as Bunyamwera virus (BUNV, family Peribunyaviridae) and Prospect Hill virus (PHV, family Hantaviridae), which enable us to conduct research at biosafety level 2. We then validate and extend our findings using pathogenic viruses. Our lab also utilizes reverse genetics to investigate bunyaviral replication and to develop novel tools—such as viral tagging—for in vitro studies. Additionally, we have customized various RNA-seq methods to address fundamental questions about virus-host interactions.
In parallel, we are committed to developing antiviral countermeasures. In collaboration with partners, we isolate monoclonal antibodies from hybridomas and from the immune responses of individuals previously infected with viruses. We characterize these antibodies to gain insight into their mechanisms of action, the viral replication process, and their potential as therapeutic agents.

Collaboration interests

  • Cryo-EM/ Structural biology
  • Singel-cell transcriptomics
  • In vivo BSL-4 work

Selected publications

  • DIETERLE, M. Eugenia, et al. A replication-competent vesicular stomatitis virus for studies of SARS-CoV-2 spike-mediated cell entry and its inhibition. Cell host & microbe, 2020, vol. 28, no 3, p. 486-496. e6.

  • HASLWANTER, Denise, et al. A combination of receptor-binding domain and N-terminal domain neutralizing antibodies limits the generation of SARS-CoV-2 spike neutralization-escape mutants. Mbio, 2021, vol. 12, no 5, p. 10.1128/mbio. 02473-21.

  • DIETERLE, Maria Eugenia, et al. Genetic depletion studies inform receptor usage by virulent hantaviruses in human endothelial cells. Elife, 2021, vol. 10, p. e69708.

Principal investigator

Eugenia Dieterle, PhD