Stimulatory signal Inhibitory signal
Arrows indicate interaction between receptor and ligand of B7 family members
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Familia B7-CD28: importante vía coestimuladora en la regulación inmunitaria
Con base en el reconocimiento de antígenos en la respuesta inmune adaptativa, la actividad de las células T se logra en gran medida durante la activación, donde se requieren dos señales. En primer lugar, los receptores de células T deben acoplarse específicamente a los péptidos presentados por los complejos principales de histocompatibilidad (CPH) en las células presentadoras de antígenos (CPA); en segundo lugar, los receptores coestimuladores/coinhibidores de las células T deben unirse a la familia de ligandos B7 expresada en las APC para regular la situación de las células T.
Esto proporciona un punto de control clave en la regulación de la inmunidad de las células T. La activación de las células T está regulada por el sistema inmunitario innato a través de moléculas coestimuladoras positivas y negativas. Se ha demostrado que los miembros de la familia B7 son importantes para regular las respuestas de las células T. Entonces, la familia de ligandos B7 juega un papel importante en los cánceres humanos y las enfermedades autoinmunes. La familia de ligandos B7 comprende 11 miembros, que son B7-1, B7-2, B7-H1, B7-DC, B7-H2, B7-H3, B7-H4, B7-H5, BTNL2, B7-H6 y B7- H7.
ACROBiosystems ha desarrollado proteínas exclusivas de la familia B7 con alta pureza y alta bioactividad, que son adecuadas para el cribado inmunológico, de anticuerpos, SPR, detección de actividad celular y otros experimentos, y pueden acelerar el desarrollo de fármacos de anticuerpos.
Stimulatory signal Inhibitory signal
Arrows indicate interaction between receptor and ligand of B7 family members
Click the molecule name to view product details
B7 family ligand | Ligand alias | Expression | Putative receptors | Role in T/NK cell responses | |
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Immune cells | Tumor | ||||
B7-H1 | PD-L1,CD274,PDCD1LG1 | + | + | PD-1,CD80 | Inhibition |
B7-DC | PD-L2,CD273,PDCD1LG2 | + | + | PD-1,RGMB | Inhibition |
B7-1 | CD80,BB1,LAB-7,CD28LG1 | + | CD28,CTLA-4, PD-L1 | Activation/Inhibition | |
B7-2 | CD86,B70,LAB72,CD28LG2 | + | CD28,CTLA-4 | Activation/Inhibition | |
B7-H3 | CD276,B7RP-2 | + | + | Unidentified | Activation/Inhibition |
B7-H5 | VISTA,GI24,VSIR,SISP1,PD1H,DD1α | + | - | VSIG3 | Inhibition |
B7-H2 | ICOS-L,ICOSLG,GL50,B7RP1,LICOS | + | ICOS,CD28,CTLA-4 | Activation | |
B7-H4 | B7x,B7S1,B7h.5,VTCN1 | + | + | Unidentified | Inhibition |
B7-H6 | NCR3LG1,NR3L1 | - | + | NKp30 | Activation |
B7-H7 | HHLA2,B7y | + | + | CD28H | Activation/Inhibition |
Inhibition
Activation
Activation/Inhibition
Molecule | Cat. No. | Host | Product Description | Structure |
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Molecule | Cat. No. | Host | Product Description | Structure |
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Molecule | Cat. No. | Host | Product Description | Structure |
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The purity of Human B7-H3, His Tag (Cat. No. B73-H52E2) is more than 90% and the molecular weight of this protein is around 30-40 kDa verified by SEC-MALS.
Anti-Human PD-L1 Mab (Human IgG1) captured on CM5 chip via anti-human IgG Fc antibodies surface, can bind Human PD-L1, His Tag (Cat. No. PD1-H5229) with an affinity constant of 0.286 nM as determined in a SPR assay (Biacore T200)(Routinely tested).
Flow Cytometry assay shows that Biotinylated Human B7-1, Fc,Avitag (Cat. No. B71-H82F2) can bind to 293 cell overexpressing human CTLA-4. The concentration of Human B7-1 is 0.3 μg/mL (Routinely tested).
FACS analysis shows that the binding of Biotinylated Human B7-1, Fc,Avitag (Cat. No. B71-H82F2) to 293 overexpressing CTLA-4 was inhibited by increasing concentration of neutralizing Anti-Human CTLA-4 antibody. The concentration of B7-1 used is 0.3 μg/mL. The IC50 is 3.025 μg/mL (Routinely tested).
Human B7-H3 (4Ig), His Tag (Cat. No. B7B-H52E7) inhibits Anti-CD3-induced proliferation of PBMC. The EC50 for this effect is 7.95 μg/mL (Routinely tested).
Immobilized cell surface PD-1 (5x104 of cells per well) can bind Human PD-L1, Fc Tag (Cat. No. PD1-H5258) with an EC50 of 0.029 μg/mL (Routinely tested).
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