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Positive allosteric modulators of the PD-1•PD-L1 interaction as a new mode of therapeutic intervention for autoimmune diseases: preclinical proof of concept in humanized mice

Descrizione del progetto

Modulazione allosterica dei checkpoint immunitari per l’autoimmunità

I checkpoint immunitari sono molecole regolatrici chiave che modulano le risposte immunitarie per mantenere l’equilibrio e prevenire l’autoimmunità. Sono stati studiati farmaci convenzionali che inibiscono queste molecole per la terapia del cancro e delle malattie autoimmuni. Il progetto PAMinMICE, finanziato dal CER, esplorerà una strategia completamente nuova tramite lo sviluppo di modulatori allosterici positivi (positive allosteric modulators, PAM) che migliorano la segnalazione dei checkpoint. I PAM stabilizzano l’interazione tra i recettori dei checkpoint e i ligandi, favorendo così la soppressione delle risposte immunitarie predominanti nelle malattie autoimmuni. I ricercatori testeranno questo approccio pionieristico su modelli murini umanizzati di lupus, psoriasi e colite. I risultati del progetto potranno portare a una nuova strada terapeutica per le malattie autoimmuni.

Obiettivo

The immune system's balance in fighting infections or cancer while avoiding autoimmune reactions is regulated by co-inhibitory and co-stimulatory immune checkpoints (ICs). ICs are major drug targets in immunotherapy, with antibodies (Abs) blocking inhibitory ICs to fight cancer, and Abs blocking stimulatory ICs in clinical trials for autoimmune diseases.
Surprisingly, but likely fuelled by the worldwide focus on IC inhibitors, the field largely ignored that ICs are genuine transmembrane receptors that transmit signals upon binding of an extracellular ligand. This leaves unexplored modes of therapeutic intervention that we uncover in my granted ERC-2023-ADG by validating allosteric Nanobodies (Nbs) that bind and stabilize ICs, to agonize their activity as first-in-class allosteric modulators, thus tipping the immune homeostasis balance opposite to IC inhibitors for treating autoimmunity.
Recently, we discovered the first-ever positive allosteric modulators (PAMs) of an IC and characterized several PAMs of the human PD-1•PD-L1 complex that agonize PD-L1 binding to PD-1 (affinity) and stimulate IC signalling (efficacy) in a spatio-temporal-selective and pathway-selective manner. Building on these exceptional proof of concept data, I’m founding our next integrated drug discovery company focussing on allosteric immunotherapies as a new mode of therapeutic intervention.
With PAMinMICE, I will perform pioneering experiments in animal models and test positive allosteric modulation of the PD-1•PD-L1 interaction in double-humanized PD-1•PD-L1 knock-in mice as a new mode of therapeutic intervention for diverse autoimmune diseases: psoriasis, colitis, atopic dermatitis, lupus, rheumatoid arthritis. This study may provide the first preclinical evidence supporting the use of allosteric modulators targeting inhibitory ICs for treating such disorders, with the goals of (i) benefiting patients, (ii) strengthening our IP portfolio, and (iii) positioning us for successful fundraising toward the spin-off.

Campo scientifico (EuroSciVoc)

Programma(i)

Argomento(i)

Meccanismo di finanziamento

HORIZON-ERC-POC - HORIZON ERC Proof of Concept Grants

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Invito a presentare proposte

(si apre in una nuova finestra) ERC-2025-POC

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Istituzione ospitante

VIB VZW
Contributo netto dell'UE
€ 150 000,00
Indirizzo
SUZANNE TASSIERSTRAAT 1
9052 ZWIJNAARDE - GENT
Belgio
Regione
Vlaams Gewest Prov. Oost-Vlaanderen Arr. Gent
Tipo di attività
Research Organisations
Collegamenti
Costo totale
Nessun dato

Beneficiari (1)