A new research article was published in the Journal Natural Products and Bioprospecting (IF 2024: 4.9). Hellinger et al. report the screening of eleven Psychotria species for cyclic cystine-knot peptides. Psysol 3 from Psychotria solitudinum was isolated as a prototypic inhibitor of human prolyl oligopeptidase. The synthetic peptide showed an IC50 = 1.3 µM and is thus one of the most active cyclotides known so far inhibiting the enzyme.
The Austrian Science Fund (FWF) project ZK-81B, PeptAIDes- Peptide Therapeutics for Autoimmune and Inflammtory Diseases officially ended with the 30.09.2025. The project’s final report is know available via the Science Radar provided by the Austrian Science Fund.
Over the past five years, the interdisciplinary Young Independent Researcher Group PeptAIDes has worked on fundamental questions in peptide science and the molecular and cellular mechanisms driving inflammatory or autoimmune diseases and cancer. Overall, the implications of this project span inflammatory and autoimmune disorders, metabolic diseases, cancer, renal injury, and pain management. We showed that natural peptides are promising molecules with drug-like properties and have implemented technologies to use them as bioactive probes or molecular scaffolds to prepare new bioactive molecules. We studied new approaches for computationally aided rational peptide design and implemented new peptide library synthesis approaches. We refined the molecular grafting approach using scaffold matching and structural model prediction workflows. Proof-of-concept data were established for new peptide therapeutics that alter immune cell transendothelial migration or peptide shuttle systems that enable the transport of therapeutic cargoes into the central nervous system. Other achievements include the characterization of novel therapeutic peptides that stimulate natural killer cells for cell cytotoxicity against cancerous target cells. In addition, we established a patient-relevant NK cell leukemia model that is being used for functional drug screening. The role of anti-malonaldehyde IgM antibodies in alcohol-related fatty liver disease was investigated, providing new insights into disease development and progression. We developed and patented an ‚AI-designed peptide-small molecule conjugate drug-discovery workflow‘ for the -opioid receptor, opening a promising avenue for non-addictive pain therapies. In summary, the implemented collaborative interdisciplinary strategy demonstrated how cutting-edge peptide science can be translated into meaningful preclinical research and applications in translational medicine while providing tools and workflows that empower the broader research community. Further studies will consider the safety and efficacy of the prepared probes to validate their application in a therapeutic setting.
In total 33 publications were achieved, with 8 data sets, 1 general policy, 2 new research methods developed, 21 scientific awards were granted to project personal.
A new research article was recently published in the Journal of Natural Products (ACS). Akinleye, et al. investigated the expression of cyclic cystine-knot peptides in Spgelia anthelmia L. and studied their antimicrobial activity.
PI Dr. Roland Hellinger was invited to give an oral presentation at the 2nd Blood-Brain-Barrier Barcelona Conference with around +150 attendees. The title of the talk was „BLOOD BRAIN BARRIER – NATURAL PEPTIDE SHUTTLES FOR DRUG DELIVERY INTO THE CNS“. My special thank you is directed to funders, e.g., EU COST Action Snoopy and EU Cost Action OneHealthDrugs, for providing STSM mobility support to involved researchers.
My research stay at the EPFL between 01/06/2025 and 31/08/2025 is coming to an end. I had a wonderful stay hosted by Univ.-Prof. Christian Heinis and the Laboratory for Protein and Peptide Therapeutics (LPPT). The SNOOPY COST action CA23111 provided me with financial support through a short-time scientific mission (STSM), for which I am deeply grateful.