Compared to conventional antibodies, nanobodies are characterized by smaller size and a longer CDR3 region, characteristics that allow for better tissue penetration and binding to difficult-to-access epitopes. They also exhibit greater stability, solubility, and ease of engineering. This paper analyzes the generation and characterization of a nanobody capable of binding CD39, with the aim of blocking its activity in tumors. CD39 is an enzyme that degrades extracellular ATP into ADP, thus reducing the pro-inflammatory effect of the substrate. The authors of the article, after producing a synthetic library via phage display, tested the nanobodies' affinity for the target protein and the inhibition achieved, identifying SB24 as the most promising candidate. SB24 dimerized with rabbit IgG exhibits significantly higher affinity for the epitope than monomeric SB24. This study represents an important contribution to the development of new nanobody-based antitumor immunotherapy strategies, confirming CD39 as a promising therapeutic target.
I nanobodies, rispetto agli anticorpi convenzionali, sono caratterizzati da dimensioni ridotte e da una regione CDR3 più lunga, caratteristiche che consentono una migliore penetrazione nei tessuti, e il legame con epitopi difficilmente accessibili. Presentano inoltre maggiore stabilità, solubilità e facilità di ingegnerizzazione. Questo elaborato analizza la generazione e la caratterizzazione di un nanobody in grado di legare CD39, con l’obiettivo di bloccarne l’attività nel contesto tumorale. CD39 è un enzima che degrada l’ATP extracellulare in ADP, riducendo così l’effetto pro-infiammatorio del substrato. Gli autori dell’articolo in esame, dopo aver prodotto una libreria sintetica, tramite phage display, hanno testato l’affinità dei Nanobodies per la proteina target, e l’inibizione ottenuta, individuando SB24 come il candidato più promettente. SB24 dimerizzato con IgG di coniglio mostra un’affinità all’epitopo significativamente superiore rispetto al monomero SB24. Questo studio rappresenta un importante contributo allo sviluppo di nuove strategie di immunoterapia antitumorale basate sui nanobodies, confermando CD39 come un target terapeutico promettente.
Generazione e caratterizzazione di nanobodies in grado di bloccare l'attività enzimatica di CD39 umano
BONELLI, FRANCESCO
2025/2026
Abstract
Compared to conventional antibodies, nanobodies are characterized by smaller size and a longer CDR3 region, characteristics that allow for better tissue penetration and binding to difficult-to-access epitopes. They also exhibit greater stability, solubility, and ease of engineering. This paper analyzes the generation and characterization of a nanobody capable of binding CD39, with the aim of blocking its activity in tumors. CD39 is an enzyme that degrades extracellular ATP into ADP, thus reducing the pro-inflammatory effect of the substrate. The authors of the article, after producing a synthetic library via phage display, tested the nanobodies' affinity for the target protein and the inhibition achieved, identifying SB24 as the most promising candidate. SB24 dimerized with rabbit IgG exhibits significantly higher affinity for the epitope than monomeric SB24. This study represents an important contribution to the development of new nanobody-based antitumor immunotherapy strategies, confirming CD39 as a promising therapeutic target.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/114837