Abstract
Directed self-assembly of small molecules in living systems could enable a myriad of applications in biology and medicine, and already this has been used widely to synthesize supramolecules and nano/microstructures in solution and in living cells. However, controlling the self-assembly of synthetic small molecules in living animals is challenging because of the complex and dynamic in vivo physiological environment. Here we employ an optimized first-order bioorthogonal cyclization reaction to control the self-assembly of a fluorescent small molecule, and demonstrate its in vivo applicability by imaging caspase-3/7 activity in human tumour xenograft mouse models of chemotherapy. The fluorescent nanoparticles assembled in situ were imaged successfully in both apoptotic cells and tumour tissues using three-dimensional structured illumination microscopy. This strategy combines the advantages offered by small molecules with those of nanomaterials and should find widespread use for non-invasive imaging of enzyme activity in vivo.
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References
Whitesides, G. M., Mathias, J. P. & Seto, C. T. Molecular self-assembly and nanochemistry: a chemical strategy for the synthesis of nanostructures. Science 254, 1312–1319 (1991).
Capito, R. M., Azevedo, H. S., Velichko, Y. S., Mata, A. & Stupp, S. I. Self-assembly of large and small molecules into hierarchically ordered sacs and membranes. Science 319, 1812–1816 (2008).
O'Leary, L. E., Fallas, J. A., Bakota, E. L., Kang, M. K. & Hartgerink, J. D. Multi-hierarchical self-assembly of a collagen mimetic peptide from triple helix to nanofibre and hydrogel. Nature Chem. 3, 821–828 (2011).
Gazit, E. Bioinspired chemistry: diversity for self-assembly. Nature Chem. 2, 1010–1011 (2010).
Yang, Z., Liang, G. & Xu, B. Enzymatic hydrogelation of small molecules. Acc. Chem. Res. 41, 315–326 (2008).
Liang, G., Ren, H. & Rao, J. A biocompatible condensation reaction for controlled assembly of nanostructures in living cells. Nature Chem. 2, 54–60 (2010).
Gao, Y., Shi, J., Yuan, D. & Xu, B. Imaging enzyme-triggered self-assembly of small molecules inside live cells. Nature Commun. 3, 1033 (2012).
Adler-Abramovich, L. et al. Phenylalanine assembly into toxic fibrils suggests amyloid etiology in phenylketonuria. Nature Chem. Biol. 8, 701–706 (2012).
Williams, R. J. et al. The in vivo performance of an enzyme-assisted self-assembled peptide/protein hydrogel. Biomaterials 32, 5304–5310 (2011).
Ye, D., Liang, G., Ma, M. L. & Rao, J. Controlling intracellular macrocyclization for the imaging of protease activity. Angew. Chem. Int. Ed. 50, 2275–2279 (2011).
Vemula, P. K. et al. On-demand drug delivery from self-assembled nanofibrous gels: a new approach for treatment of proteolytic disease. J. Biomed. Mater. Res. A 97, 103–110 (2011).
Saxon, E. & Bertozzi, C. R. Cell surface engineering by a modified Staudinger reaction. Science 287, 2007–2010 (2000).
Lin, F. L., Hoyt, H. M., van Halbeek, H., Bergman, R. G. & Bertozzi, C. R. Mechanistic investigation of the Staudinger ligation. J. Am. Chem. Soc. 127, 2686–2695 (2005).
Agard, N. J., Prescher, J. A. & Bertozzi, C. R. A strain-promoted [3+2] azide–alkyne cycloaddition for covalent modification of biomolecules in living systems. J. Am. Chem. Soc. 126, 15046–15047 (2004).
Ning, X., Guo, J., Wolfert, M. A. & Boons, G. J. Visualizing metabolically labeled glycoconjugates of living cells by copper-free and fast Huisgen cycloadditions. Angew. Chem. Int. Ed. 47, 2253–2255 (2008).
Devaraj, N. K., Upadhyay, R., Haun, J. B., Hilderbrand, S. A. & Weissleder, R. Fast and sensitive pretargeted labeling of cancer cells through a tetrazine/trans-cyclooctene cycloaddition. Angew. Chem. Int. Ed. 48, 7013–7016 (2009).
Blackman, M. L., Royzen, M. & Fox, J. M. Tetrazine ligation: fast bioconjugation based on inverse-electron-demand Diels–Alder reactivity. J. Am. Chem. Soc. 130, 13518–13519 (2008).
Lang, K. et al. Genetically encoded norbornene directs site-specific cellular protein labelling via a rapid bioorthogonal reaction. Nature Chem. 4, 298–304 (2012).
Agarwal, P., van der Weijden, J., Sletten, E. M., Rabuka, D. & Bertozzi, C. R. A Pictet–Spengler ligation for protein chemical modification. Proc. Natl Acad. Sci. USA 110, 46–51 (2013).
Yusop, R. M., Unciti-Broceta, A., Johansson, E. M., Sanchez-Martin, R. M. & Bradley, M. Palladium-mediated intracellular chemistry. Nature Chem. 3, 239–243 (2011).
Chan, J., Dodani, S. C. & Chang, C. J. Reaction-based small-molecule fluorescent probes for chemoselective bioimaging. Nature Chem. 4, 973–984 (2012).
Prescher, J. A., Dube, D. H. & Bertozzi, C. R. Chemical remodelling of cell surfaces in living animals. Nature 430, 873–877 (2004).
Laughlin, S. T., Baskin, J. M., Amacher, S. L. & Bertozzi, C. R. In vivo imaging of membrane-associated glycans in developing zebrafish. Science 320, 664–667 (2008).
Devaraj, N. K., Thurber, G. M., Keliher, E. J., Marinelli, B. & Weissleder, R. Reactive polymer enables efficient in vivo bioorthogonal chemistry. Proc. Natl Acad. Sci. USA 109, 4762–4767 (2012).
Sletten, E. M. & Bertozzi, C. R. From mechanism to mouse: a tale of two bioorthogonal reactions. Acc. Chem. Res. 44, 666–676 (2011).
Ren, H. et al. A biocompatible condensation reaction for the labeling of terminal cysteine residues on proteins. Angew. Chem. Int. Ed. 48, 9658–9662 (2009).
Van de Bittner, G. C., Bertozzi, C. R. & Chang, C. J. Strategy for dual-analyte luciferin imaging: in vivo bioluminescence detection of hydrogen peroxide and caspase activity in a murine model of acute inflammation. J. Am. Chem. Soc. 135, 1783–1795 (2013).
Brindle, K. New approaches for imaging tumour responses to treatment. Nature Rev. Cancer 8, 94–107 (2008).
Blankenberg, F. G. In vivo detection of apoptosis. J. Nucl. Med. 49 (suppl. 2), 81S–95S (2008).
Nguyen, Q. D. et al. Positron emission tomography imaging of drug-induced tumor apoptosis with a caspase-3/7 specific 18F-labeled isatin sulfonamide. Proc. Natl Acad. Sci. USA 106, 16375–16380 (2009).
Johnson, J. R., Kocher, B., Barnett, E. M., Marasa, J. & Piwnica-Worms, D. Caspase-activated cell-penetrating peptides reveal temporal coupling between endosomal release and apoptosis in an RGC-5 cell model. Bioconjugate Chem. 23, 1783–1793 (2012).
Edgington, L. E. et al. Noninvasive optical imaging of apoptosis by caspase-targeted activity-based probes. Nature Med. 15, 967–973 (2009).
Thornberry, N. A. et al. A combinatorial approach defines specificities of members of the caspase family and granzyme B. Functional relationships established for key mediators of apoptosis. J. Biol. Chem. 272, 17907–17911 (1997).
Pozarowski, P. et al. Interactions of fluorochrome-labeled caspase inhibitors with apoptotic cells: a caution in data interpretation. Cytometry A 55, 50–60 (2003).
Park, D. et al. Noninvasive imaging of cell death using an Hsp90 ligand. J. Am. Chem. Soc. 133, 2832–2835 (2011).
Pace, N. J., Pimental, D. R. & Weerapana, E. An inhibitor of glutathione S-transferase Omega 1 that selectively targets apoptotic cells. Angew. Chem. Int. Ed. 51, 8365–8368 (2012).
Tetko, I. V. et al. Virtual computational chemistry laboratory – design and description. J. Comput. Aided Mol. Des. 19, 453–463 (2005).
Maxwell, D., Chang, Q., Zhang, X., Barnett, E. M. & Piwnica-Worms, D. An improved cell-penetrating, caspase-activatable, near-infrared fluorescent peptide for apoptosis imaging. Bioconjugate Chem. 20, 702–709 (2009).
Edgington, L. E., Verdoes, M. & Bogyo, M. Functional imaging of proteases: recent advances in the design and application of substrate-based and activity-based probes. Curr. Opin. Chem. Biol. 15, 798–805 (2011).
Stepczynska, A. et al. Staurosporine and conventional anticancer drugs induce overlapping, yet distinct pathways of apoptosis and caspase activation. Oncogene 20, 1193–1202 (2001).
Wang, S. et al. Doxorubicin induces apoptosis in normal and tumor cells via distinctly different mechanisms. Intermediacy of H2O2- and p53-dependent pathways. J. Biol. Chem. 279, 25535–25543 (2004).
Schermelleh, L. et al. Subdiffraction multicolor imaging of the nuclear periphery with 3D structured illumination microscopy. Science 320, 1332–1336 (2008).
Westphal, V. et al. Video-rate far-field optical nanoscopy dissects synaptic vesicle movement. Science 320, 246–249 (2008).
Wang, K. et al. In vivo imaging of tumor apoptosis using histone H1-targeting peptide. J. Control. Release 148, 283–291 (2010).
Brigham, M. P., Stein, W. H. & Moore, S. The concentrations of cysteine and cystine in human blood plasma. J. Clin. Invest. 39, 1633–1638 (1960).
Salemi, G. et al. Blood levels of homocysteine, cysteine, glutathione, folic acid, and vitamin B12 in the acute phase of atherothrombotic stroke. Neurol. Sci. 30, 361–364 (2009).
Cao, C. Y., Shen, Y. Y., Wang, J. D., Li, L. & Liang, G. L. Controlled intracellular self-assembly of gadolinium nanoparticles as smart molecular MR contrast agents. Sci. Rep. 3, 1024 (2013).
Wysocki, L. M. & Lavis, L. D. Advances in the chemistry of small molecule fluorescent probes. Curr. Opin. Chem. Biol. 15, 752–759 (2011).
Merian, J., Gravier, J., Navarro, F. & Texier, I. Fluorescent nanoprobes dedicated to in vivo imaging: from preclinical validations to clinical translation. Molecules 17, 5564–5591 (2012).
Acknowledgements
This work was supported by the Stanford University National Cancer Institute (NCI) Centers of Cancer Nanotechnology Excellence (1U54CA151459-01), the NCI ICMIC@Stanford (1P50CA114747-06) and an Institutional Development Award from the Department of Defense Breast Cancer Research Program (W81XWH-09-1-0057). A.J.S. is supported by a postdoctoral fellowship from the Susan Komen Breast Cancer Foundation. We thank A. Olson at the Neuroscience Microscopy Service in Stanford University for assistance with 3D-SIM imaging.
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D.Y. performed all the compound syntheses and characterizations, collected enzymatic reactions and carried out the cell imaging. D.Y. and A.J.S. performed the 3D-SIM studies. A.J.S. set up the animal model. A.J.S. and D.Y. performed the in vivo studies and A.J.S. analysed the data. D.Y. and S.S.T. set up the apoptotic cell model. D.Y. and L.C. performed the flow-cytometry studies and analysed the data. G.T. performed the TEM experiment. L.T. carried out the immunohistochemistry staining of the tumour tissue. All authors discussed the results and commented on the manuscript. D.Y., A.J.S., D.W.F. and J.R. co-wrote the paper.
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The authors declare competing financial interests: Stanford University has filed a provisional patent application (serial number 61/869,223) to protect part of the technology described in the study.
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Ye, D., Shuhendler, A., Cui, L. et al. Bioorthogonal cyclization-mediated in situ self-assembly of small-molecule probes for imaging caspase activity in vivo. Nature Chem 6, 519–526 (2014). https://doi.org/10.1038/nchem.1920
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DOI: https://doi.org/10.1038/nchem.1920
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