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<lom:langstring xml:lang="x-none">10.1038/s41598-023-31568-x</lom:langstring>

  
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<lom:title>
  
<lom:langstring xml:lang="en">Rabbit derived VL single-domains as promising scaffolds to generate antibody-drug conjugates</lom:langstring>

  
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<lom:description>
  
<lom:langstring xml:lang="en">Antibody-drug conjugates (ADCs) are among the fastest-growing classes of therapeutics in oncology. Although ADCs are in the spotlight, they still present significant engineering challenges. Therefore, there is an urgent need to develop more stable and effective ADCs. Most rabbit light chains have an extra disulfide bridge, that links the variable and constant domains, between Cys80 and Cys171, which is not found in the human or mouse. Thus, to develop a new generation of ADCs, we explored the potential of rabbit-derived VL-single-domain antibody scaffolds (sdAbs) to selectively conjugate a payload to Cys80. Hence, a rabbit sdAb library directed towards canine non-Hodgkin lymphoma (cNHL) was subjected to in vitro and in vivo phage display. This allowed the identification of several highly specific VL-sdAbs, including C5, which specifically target cNHL cells in vitro and present promising in vivo tumor uptake. C5 was selected for SN-38 site-selective payload conjugation through its exposed free Cys80 to generate a stable and homogenous C5-DAB-SN-38. C5-DAB-SN-38 exhibited potent cytotoxicity activity against cNHL cells while inhibiting DNA-TopoI activity. Overall, our strategy validates a platform to develop a novel class of ADCs that combines the benefits of rabbit VL-sdAb scaffolds and the canine lymphoma model as a powerful framework for clinically translation of novel therapeutics for cancer.</lom:langstring>

  
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<lom:language>eng</lom:language>

  
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<lom:langstring xml:lang="en">Therapeutic Activity; Next-Generation; Strategies; Selection; Peptide</lom:langstring>

  
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<lom:datetime>2023-10-20T09:19:55.450Z</lom:datetime>

  
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N:André;Ana S.;
FN:Ana S. André
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N:Aires-da-Silva;Frederico;
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N:Tavares;Luís;
FN:Luís Tavares
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N:Gil;Solange;
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N:Gois;Pedro M. P.;
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N:Goncalves;Joao;
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N:Castanho;Miguel;
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N:Correia;João D. G.;
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N:Gano;Lurdes;
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N:Rütgen;Barbara;
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N:Braz;Berta São;
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N:Carrapiço;Belmira;
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N:Vicente;Gonçalo;
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N:Oliveira;Soraia;
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N:Neves;Vera;
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N:Cavaco;Marco;
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N:António;João P M;
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N:Carvalho;Joana Inês;
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N:Nogueira;Sara;
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N:Aguiar;Sandra;
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N:Dias;Joana N. R.;
FN:Joana N. R. Dias
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