Cyclophilins are cellular proteins that play complex and indispensable roles in cell metabolism. They are very often used by viruses to help complete their life cycle. Cyclophilins therefore represent a potential target for broad-spectrum antiviral drugs, i.e. drugs that are effective against many virus families. Cyclophilin inhibitors also have cell protection properties associated with inhibiting the opening of the mitochondrial pore. Unfortunately, the existing inhibitors, all derived from cyclosporin A, present considerable problems that impede their clinical development.
The teams led by Professor Jean-Michel Pawlotsky (Mondor Institute of Biomedical Research [IMR], Henri Mondor Hospital AP-HP, Inserm/University Paris-Est Créteil [UPEC]) and Dr Jean-François Guichou (Centre for Structural Biochemistry [CBS], Montpellier University/CNRS/Inserm), have joined forces and used innovative techniques to create and optimise a whole new family of chemicals that directly target cyclophilins. This work was supported by the French National Agency for Research on AIDS and Viral Hepatitis (ANRS). The new inhibitors thus specifically block the action of cyclophilins by inhibiting the multiplication of viruses from different viral families such as hepatitis C virus, HIV, hepatitis B virus and several coronavirus strains.
This work was carried out as part of a close collaboration between Dr Abdelhakim AHMED-BELKACEM and Prof. Jean-Michel PAWLOTSKY for the team “Physiopathology and therapeutics of chronic viral hepatitis and related cancers” (Mondor Institute of Biomedical Research, Inserm/UPEC). It also involves Dr Lionel COLLIANDRE and Dr Jean-François GUICHOU from the Centre for Structural Biochemistry (CBS; Montpellier University/Inserm/CNRS) and researchers from the Institute of Analytical Sciences (ISA; CNRS/ENS Lyon/Claude Bernard Lyon 1 University).
The team “Physiopathology and therapeutics of chronic viral hepatitis and related cancers” at the Mondor Institute of Biomedical Research is developing research on two main themes: the development of broad-spectrum antiviral approaches (building on its experience in the development of new treatments for hepatitis C), and the role of inflammation and the liver microenvironment in the occurrence and progression of primary liver cancers.
Meanwhile, the team “Structures and screening of therapeutic and environmental targets” at the Centre for Structural Biochemistry is developing an integrated approach to spur and rationalise the development of new molecules with potential therapeutic applications, using X-ray crystallography and structural bioinformatics.
Inserm Unit U919, directed by Prof. Denis Vivien (“Serine Proteases and Physiopathology of the Neurovascular Unit”) has developed an antibody with potential therapeutic effects against multiple sclerosis. The study, directed by Fabian Docagne and published in Brain, paves the way for a ...
Scientists estimate that approximately 95 percent of adults around the world are infected with the Epstein-Barr virus. In rare cases, an infection with this virus causes cancer. Scientists at the German Cancer Research Center (DKFZ), at the German Center for Infection Research ...
Fragment-based discovery of a new family of non-peptidic small-molecule cyclophilin inhibitors with potent antiviral activities.
Abdelhakim Ahmed-Belkacem, Lionel Colliandre, Nazim Ahnou1, Quentin Nevers, Muriel Gelin, Yannick Bessin, Rozenn Brillet, Olivier Cala, Dominique Douguet, William Bourguet, Isabelle Krimm, Jean-Michel Pawlotsky, & Jean- François Guichou.
Nature communications, le 22 septembre 2016.