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> Anticorps anti-idiotypiques
Un idiotope est l'ensemble unique de déterminants antigéniques (épitopes) de la partie variable d'un anticorps. Un anticorps anti-idiotypique (Anti-ID) se lie à l'idiotope d'un autre anticorps, généralement un médicament anticorps, ce qui en fait un outil très puissant pour le développement de médicaments anticorps, en particulier pour les analyses d'immunogénicité et PK/PD.
Pour soutenir les analyses précliniques/cliniques d'immunogénicité et PK, ACROBiosystems a développé une série d'anticorps anti-idiotypiques de haute affinité. Notre pipeline couvre cinq cibles en vogue, dont adalim*mab, Ritux*mab, Cetux*mab, Trastuz*mab et Bevaciz*mab. Pour faciliter le processus de développement de médicaments, nous fournissons des protocoles de test qui peuvent être employés pour différents scénarios d'application.
| Molecule | Cat. No. | Antigen | Neutralizing Activity | Application |
|---|---|---|---|---|
| Adalimu*ab | ADB-Y19 | Anti-Adalimu*ab Antibodies (AY19) | Neutralizing Antibody | ADA assay; Neutralizing assay; Indirect ELISA |
| Bevacizu*ab | BEB-Y10 | Anti-Bevacizu*ab Antibodies (AY10) (MALS verified, recommended for PK/PD) | Neutralizing Antibody | PK bridging ELISA; Neutralizing assay; Indirect ELISA |
| Bevacizu*ab | BEB-Y12 | Anti-Bevacizu*ab Antibodies (AY12) (recommended for neutralizing assay) | Neutralizing Antibody | ADA assay; Neutralizing assay; Indirect ELISA |
| Bevacizu*ab | BEB-Y9 | Anti-Bevacizu*ab Antibodies (AY9) (recommended for ADA assay) | Neutralizing Antibody | ADA assay; Neutralizing assay; Indirect ELISA |
| Bevacizu*ab | BEB-BY13 | Biotinylated Anti-Bevacizu*ab Antibodies (AY13) (recommended for PK/PD) | Neutralizing Antibody | PK bridging ELISA;Neutralizing assay; Indirect ELISA |
| Cetuxi*ab | CEB-Y27 | Anti-Cetuxi*ab Antibodies (AY27) (recommended for ADA assay) | Neutralizing Antibody | ADA assay; Neutralizing assay; Indirect ELISA |
| Cetuxi*ab | CEB-Y31 | Anti-Cetuxi*ab Antibodies (AY31) (Non-Neutralizing) | Non-Neutralizing Antibody | ADA assay; Indirect ELISA |
| Cetuxi*ab | CEB-Y28 | Anti-Cetuxi*ab Antibodies (AY28) | Neutralizing Antibody | ADA assay; Neutralizing assay; Indirect ELISA |
| Cetuxi*ab | CEB-BY31 | Biotinylated Anti-Cetuxi*ab Antibodies (AY31) (recommended for PK/PD) | Non-Neutralizing Antibody | PK bridging ELISA; Indirect ELISA |
| Rituxi*ab | RIB-Y36 | Anti-Rituxi*ab Antibodies (AY36) (recommended for ADA assay) | Neutralizing Antibody | ADA assay;Neutralizing assay; Indirect ELISA |
| Rituxi*ab | RIB-Y37 | Anti-Rituxi*ab Antibodies (AY37) (recommended for PK/PD) | Neutralizing Antibody | PK bridging ELISA;Neutralizing assay;Indirect ELISA |
| Rituxi*ab | RIB-FY35c | FITC-Labeled Anti-Rituxi*ab Antibodies, Mouse IgG1 | Neutralizing Antibody | ADA assay;Neutralizing assay; Indirect ELISA |
| Trastuzu*ab | TRB-Y5b | Anti-Trastuzu*ab Antibodies (AY5b) (recommended for PK/PD) | Non-Neutralizing Antibody | Neutralizing Antibody |
| Trastuzu*ab | TRB-Y1b | Anti-Trastuzu*ab Antibodies (AY1b) (recommended for PK/PD) | Neutralizing Antibody | PK bridging ELISA; Neutralizing assay; Indirect ELISA |
Les protéines thérapeutiques telles que les anticorps monoclonaux sont actuellement essentielles dans le traitement du cancer, des maladies auto-immunes et d'autres maladies. Étant donné qu'une protéine a une caractéristique intrinsèque d'immunogénicité en raison de sa structure contenant des épitopes potentiels de cellules B et de cellules T, les protéines thérapeutiques ont le potentiel d'induire des anticorps anti-médicament (ADA) même si la protéine a la même séquence d'acides aminés que des protéines humaines endogènes. L'émergence d'ADA chez les patients peut potentiellement entraîner une perte d'efficacité et/ou des événements indésirables. Par conséquent, une évaluation des risques d'immunogénicité et des stratégies d'atténuation des risques sont nécessaires lors du développement de produits protéiques thérapeutiques.
Le développement en interne d'un anticorps mono/multiclonal comme contrôle positif pour les tests ADA prend énormément de temps. Pour résoudre ce problème, ACROBiosystems a développé une série d'étalons d'anticorps anti-médicaments pour les tests ADA.
Anti-Ritux*mab Antibodies bridging ELISA for Anti-Drug Antibody (ADA) assay development. Immobilized Ritux*mab at 1 µg/ml, added increasing concentrations of Anti-Ritux*mab Antibodies (Cat. No. RIB-Y36, 10% human serum) and then added biotinylated Ritux*mab at 2 µg/ml. Detection was performed using HRP-conjugated streptavidin with a sensitivity of 9.7 ng/mL.
Anti-Ritux*mab Antibodies bridging MSD for Anti-Drug Antibody (ADA) assay development. Added the mix solution (biotinylated Ritux*mab at 5 µg/mL, SULFO-Ritux*mab at 5Nµg/mL and increasing concentrations of Anti-Ritux*mab Antibodies (Cat. No. RIB-Y36, 100% human serum). Detection was performed using MSD Assay with a sensitivity of 0.97 ng/mL.
Anti-Adalim*mab Antibodies bridging ELISA for Anti-Drug Antibody (ADA) assay development. Immobilized adalim*mab at 1 µg/ml, add increasing concentrations of Anti-Adalim*mab Antibodies (Cat. No. ADB-Y19, 10% human serum) and then add biotinylated adalim*mab at 5 µg/ml. Detection was performed using HRP-conjugated streptavidin with a sensitivity of 0.6 ng/mL.
Comparison between anti-idiotypic capture ELISA and anti-idiotypic bridging ELISA for Ritux*mab detection in patient samples. Left: anti-idiotypic capture ELISA; Right: anti-idiotypic bridging ELISA.
Detection of Ritux*mab by bridging ELISA in serum. Immobilized Anti-Ritux*mab Antibodies (Cat. No. RIB-Y37) at 2 μg/ml, added increasing concentrations of Ritux*mab (10% human serum) and then added biotinylated Anti-Ritux*mab Antibodies (Cat. No. RIB-BY35) at 1 μg/ml. Detection was performed using HRP-conjugated streptavidin with a sensitivity of 1 ng/ml.
Anti-Adalim*mab Antibodies (mouse IgG1, Cat. No. ADB-Y19) captured on CM5 chip via anti-mouse antibodies surface, can bind human adalim*mab with an affinity constant of 1.36 pM.
Demonstration of the specificity of Anti-Cetux*mab Antibodies (Cat. No. CEB-Y28) to the Cetux*mab.
Reconstituted Anti-Trastuz*mab Antibodies were diluted to 0.4 mg/ml, aliquoted and placed at 37°C. Aliquots were removed from 37°C at every time point and placed at 4°C along with the control. No significant loss of activity was observed.
Anti-Trastuz*mab Antibodies were subjected to the indicated number of freeze-thaw cycles (FT). No significant loss of activity was observed.
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