Journal: Nature Biomedical Engineering
Article Title: Potentiating cancer immunotherapies with modular albumin-hitchhiking nanobody–STING agonist conjugates
doi: 10.1038/s41551-025-01400-0
Figure Lengend Snippet: a , Scheme for the cloning, expression and bioconjugation of small molecule cargo to generate the AP–diABZI conjugate. b , c , SDS–PAGE ( b ) and ESI–MS ( c ) confirming the purity and molecular weight of AP conjugates (see Source Data for uncropped gels in ref. ). d , e , Dose–response curves for indicated nanobody–diABZI conjugate in A549-Dual ( n = 3) ( d ) and THP1-Dual type I interferon reporter cell lines ( n = 3) ( e ) with estimated EC 50 values indicated in the legends. f , qPCR analysis of genes associated with STING activation in BMDMs in response to treatment at discrete time points with indicated agonist at 0.25 µM ( n = 3). g , h , Dose–response curve for nAlb–Cy5 and AP–Cy5 conjugate intracellular uptake and surface binding at 37 °C and 4 °C as measured by flow cytometry in B16.F10 cells ( n = 2 at 4 °C and n = 3 at 37 °C) ( g ) and EMT6 cells ( n = 3) ( h ). i , MFI for nAlb–Cy5 and AP–Cy5 conjugate surface binding at 2 µM compared to PBS (0 µM) for EMT6 WT and EMT6 PD-L1 KO cell lines at 37 °C ( n = 3). KO, knock-out; WT, wild type. j , Pharmacokinetics of indicated nanobody–Cy5 conjugate in healthy Balb/c female mice ( n = 4 for nPD-L1–Cy5; n = 5 for all other groups). Elimination phase half-life and AUC are indicated in the legend. k , Representative IVIS fluorescence images of excised tumours and major organs (left) and quantification of average radiant efficiencies (right) of tumours and major organs 48 h after administration of nPD-L1–Cy5 and AP–Cy5 in mice with EMT6 breast tumours ( n = 4). P values determined by repeated measures ANOVA with Dunnett’s multiple comparison test for tumour compared to indicated tissue. l , Comparison of Cy5 radiant efficiencies in tumour tissue 48 h following administration of indicated nanobody–Cy5 conjugate ( n = 6 for PBS and nAlb–Cy5; n = 4 for AP–Cy5; n = 3 for nPD-L1–Cy5). P values determined by one-way ANOVA with post hoc Tukey’s correction for multiple comparisons with comparisons between all groups and PBS and between nAlb–Cy5 and AP–Cy5 as indicated. m , Representative IVIS fluorescence images of excised tumours and major organs (left) and quantification of average radiant efficiencies (right) of tumours and major organs 48 h after administration of AP–Cy5 in mice with wild-type EMT6 (WT) and PD-L1 knock-out EMT6 (PD-L1 KO) breast tumours ( n = 5). P values determined by repeated measures ANOVA with Dunnett’s multiple comparison test for WT versus PD-L1 KO groups. Replicates are biological, and data are shown as mean ± s.e.m. Panel a created with BioRender.com .
Article Snippet: In d , end-point criteria of 1,500 mm 3 tumour volume with P value determined by log-rank test compared to PBS group or between nAlb–diABZI and AP–diABZI as indicated. e , f , Spider plots of individual tumour growth curves ( e ) and Kaplan–Meier survival curves ( f ) of mice challenged or re-challenged (for complete responders to the treatment regimen) with EMT6 cells ( n = 10 for treatment-naive and re-challenge of mice treated with AP–diABZI; n = 9 for re-challenge of mice treated with nAlb–diABZI + ICB); end-point criteria of 1,500 mm 3 tumour volume with P value determined by log-rank test compared to treatment-naive group. g , Scheme of EMT6 WT and EMT6 PD-L1 KO tumour inoculation and treatment schedule. h , Kaplan–Meier survival plots for mice with EMT6 WT ( n = 13) or PD-L1 KO ( n = 5) tumours treated with AP–diABZI or PBS; end-point criteria of 1,500 mm 3 tumour volume with P value determined by log-rank test compared to PBS (WT) group or between WT and PD-L1 KO groups as indicated in the legend. i , j , Volcano plots representing −log 10 (significance) and log (fold change) for gene expression analysis in nAlb–diABZI versus PBS ( n = 4) ( i ) and AP–diABZI versus PBS ( n = 4) ( j ). k – m , Heat maps of NanoString gene cluster matrices showing Z score fold changes for functional gene annotations ( k ), biological signatures ( l ) and cell types ( n = 4 for PBS and AP–diABZI; n = 3 for nAlb–diABZI) ( m ).
Techniques: Cloning, Expressing, SDS Page, Molecular Weight, Activation Assay, Binding Assay, Flow Cytometry, Knock-Out, Drug discovery, Fluorescence, Comparison