Recombinant mouse antibody (LEM-2/15) is capable of binding to MT1-MMP. The antibody LEM-2/15 was generated by immunizing mice with a peptide possessing the sequence of the V-B loop (aa 218-233).
Figure 1 Immunohistochemistry with the LEM2/15 anti MT1-MMP antibody in a TMA (n = 40) of Low-grade GBMs (LGG) and High-grade GBMs (HGG) patient tissues (representative images). Right panel: MT1-MMP staining intensity score (0–3).
de Lucas, A. G., Schuhmacher, A. J., Oteo, M., Romero, E., Cámara, J. A., de Martino, A.,... & Mulero, F. (2016). Targeting MT1-MMP as an ImmunoPET-based strategy for imaging gliomas. PloS one, 11(7), e0158634.
Figure 2 Immunoblotting analyses of the indicated cell lines using the LEM2/15 anti MT1-MMP antibody.
de Lucas, A. G., Schuhmacher, A. J., Oteo, M., Romero, E., Cámara, J. A., de Martino, A.,... & Mulero, F. (2016). Targeting MT1-MMP as an ImmunoPET-based strategy for imaging gliomas. PloS one, 11(7), e0158634.
Figure 3 FACS analyses of the indicated cell lines using the LEM2/15 anti MT1-MMP antibody.
de Lucas, A. G., Schuhmacher, A. J., Oteo, M., Romero, E., Cámara, J. A., de Martino, A.,... & Mulero, F. (2016). Targeting MT1-MMP as an ImmunoPET-based strategy for imaging gliomas. PloS one, 11(7), e0158634.
Figure 4 Immunohistochemistry of tumor tissue from xenografted mice used for PET imaging. MT1-MMP was detected using LEM2/15 antibody. Scale bars: 500 μm.
de Lucas, A. G., Schuhmacher, A. J., Oteo, M., Romero, E., Cámara, J. A., de Martino, A.,... & Mulero, F. (2016). Targeting MT1-MMP as an ImmunoPET-based strategy for imaging gliomas. PloS one, 11(7), e0158634.
Figure 5 PET/CT imaging with radiolabeled 89Zr-DFO-LEM2/15 in mice bearing orthotopic xenografts containing patient-derived neurospheres.
A) Representative fused PET/CT images of coronal and sagittal planes at 2 and 4 days p.i. containing TS543 brain tumors with 89Zr-DFO-LEM2/15 (left panels) and 89Zr-DFO-IgG1 as isotype control (right panels) B) Tumor-to-blood ratios for 89Zr-DFO-LEM2/15 (black bars) and 89Zr-DFO-IgG1 (grey bars) in nude mice bearing orthotopic TS453 xenografts at 2 and 4 days p.i. derived from PET imaging.
de Lucas, A. G., Schuhmacher, A. J., Oteo, M., Romero, E., Cámara, J. A., de Martino, A.,... & Mulero, F. (2016). Targeting MT1-MMP as an ImmunoPET-based strategy for imaging gliomas. PloS one, 11(7), e0158634.
Figure 6 ANS fluorescence assay. ANS (250 mM) was added to CAT-MT1-MMP (5 mM), Fab LEM-2/15 (5 mM), and a 1:1 complex. The samples were excited at 350 nm, and fluorescence spectra (400–600 nm) were recorded. The fluorescence intensity was calculated as the area of the spectra at 400–600 nm (ANS, black; MT1- MMP, red; Fab LEM-2/15, green; MT1-MMP:Fab LEM-2/15, blue).
The inset shows emission spectra of the proteins in the presence of ANS (ANS, black; MT1- MMP, red; Fab LEM-2/15, green; MT1-MMP:Fab LEM-2/15, blue).
Udi, Y., Grossman, M., Solomonov, I., Dym, O., Rozenberg, H., Moreno, V.,... & Sagi, I. (2015). Inhibition mechanism of membrane metalloprotease by an exosite-swiveling conformational antibody. Structure, 23(1), 104-115.
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