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Grant category: Research Grants in open competition

Year: 2024

Geography: Denmark

Eva Kummer’s project targets to improve our understanding of the replication machinery of the skin-infecting herpes simplex virus (HSV) in order to improve and expand treatment opportunities.

HSV is one of the most widespread viral infections. The virus persists lifelong in the nerve system of the host and causes recurrent infections with mild to severe symptoms.

Since decades, treatment of herpes infections has exclusively targeted the viral replicative DNA polymerase (an enzyme that copies the viral DNA) using nucleoside analogs. However, resistance to current nucleoside analogs is emerging necessitating the search for alternative targets.

A major caveat in developing anti-herpetic compounds is a lack of structural information of other components of the herpes simplex replication system, which are likely strong candidates for targeted drug development. Eva Kummer and her team will use cryo-electron microscopy to visualize the architecture and working principles of the protein complexes that drive herpes simplex replication. They will also aim to clarify how novel anti-herpetic drugs block the viral replication machinery and why naturally occurring resistance mutations inhibit their action.

Overall, the project will generate structural and functional insights of the HSV replication strategy and potentially improve and accelerate anti-viral drug design.

Grant category: Research Grants in open competition

Year: 2018

Geography: Netherlands

Psoriasis is highly prevalent and has a significant medical and socio-economic impact.

The prevailing dogma has been that abnormalities of the adaptive immune system were primary, but genetic studies have highlighted the importance of local skin-specific factors. We and others have identified epidermis-specific innate immunity genes, like beta-defensins and Late Cornified Envelope (LCE) genes, to be associated with disease development.

We recently made two exciting observations. First, deletion of LCE3B and LCE3C does not merely imply the loss of two genes but has a genomic effect that leads to a strong induction of the flanking LCE3A gene. Secondly, we found that LCE proteins, and LCE3A in particular, have broad-spectrum antimicrobial activity. We hypothesize that the LCE3B/C-del status affects the cutaneous host defense repertoire thereby shaping the skin microbiome. We aim to investigate the biology of LCE genes and to translate these findings to our understanding of psoriasis pathogenesis.

Key objectives are to:

1. assess the antimicrobial activity and specificity of all LCEs and their synergy with other antimicrobial proteins. This will be investigated by metagenomic approaches and classical in vitro microbiological assays, using recombinant and synthetic LCE proteins and peptides derived thereof
2. investigate LCE3B/C-del in isogenic 3D-skin equivalents in vitro generated from the immortalized human keratinocyte N/TERT cell line. Deletions of other LCE genes or their regulatory sequences will be made using CRISPR/Cas9 technology. Effects on epidermal biology relevant to psoriasis will be studied and include antimicrobial host defense, innate immune response and skin barrier function