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Dai S, Tao M, Zhong Y, Li Z, Liang J, Chen D, Liu K, Wei B, Situ B, Gao M, Tang BZ. In Situ Generation of Red-to-NIR Emissive Radical Cations in the Stomach for Gastrointestinal Imaging. Adv Mater 2023; 35:e2209940. [PMID: 36670538 DOI: 10.1002/adma.202209940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/16/2023] [Indexed: 06/17/2023]
Abstract
Red-to-near-infrared (NIR) fluorescent probes, with advantages such as high spatiotemporal resolution and in situ sensing abilities, are highly attractive for diagnosis of gastrointestinal diseases and targeted drug development. However, conventional red-to-NIR fluorophores with electron closed-shell structures require tedious synthetic procedures for preparation, and it is difficult to further decorate them with sensing groups. In this study, a series of easily prepared pyrroles with simple structures that can quickly be transformed into red-to-NIR emissive radical cations in acidic buffer solution and in vivo stomachs is developed. The in-situ-generated red-to-NIR emissive pyrrole radical cations in the stomach have excellent biocompatibility and stability and can be used not only for intravital gastrointestinal imaging with high spatiotemporal resolution, but also for dynamic monitoring of the gastric emptying process and assessment of anti-gastric-acid therapy. The acidity-induced generation of pyrrole radical cations is believed to provide a facile strategy for developing red-to-NIR fluorophores and studying gastrointestinal diseases.
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Affiliation(s)
- Shuhui Dai
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Maliang Tao
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yuan Zhong
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Zixiong Li
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jianshu Liang
- State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Dongcheng Chen
- State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Kai Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning, 530200, China
| | - Binbin Wei
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Bo Situ
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Meng Gao
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Ben Zhong Tang
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172, China
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Xiao T, Sun L, Zhang M, Li Z, Haura EB, Schonbrunn E, Ji H. Synthesis and structural characterization of a monocarboxylic inhibitor for GRB2 SH2 domain. Bioorg Med Chem Lett 2021; 51:128354. [PMID: 34506932 DOI: 10.1016/j.bmcl.2021.128354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/29/2021] [Accepted: 09/02/2021] [Indexed: 11/16/2022]
Abstract
A monocarboxylic inhibitor was designed and synthesized to disrupt the protein-protein interaction (PPI) between GRB2 and phosphotyrosine-containing proteins. Biochemical characterizations show compound 7 binds with the Src homology 2 (SH2) domain of GRB2 and is more potent than EGFR1068 phosphopeptide 14-mer. X-ray crystallographic studies demonstrate compound 7 occupies the GRB2 binding site for phosphotyrosine-containing sequences and reveal key structural features for GRB2-inhibitor binding. This compound with a -1 formal charge offers a new direction for structural optimization to generate cell-permeable inhibitors for this key protein target of the aberrant Ras-MAPK signaling cascade.
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Affiliation(s)
- Tao Xiao
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, United States
| | - Luxin Sun
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, United States
| | - Min Zhang
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, United States
| | - Zilu Li
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, United States; Department of Chemistry, University of South Florida, Tampa, FL, United States
| | - Eric B Haura
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, United States
| | - Ernst Schonbrunn
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, United States.
| | - Haitao Ji
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Drive, Tampa, FL 33612, United States; Department of Chemistry, University of South Florida, Tampa, FL, United States.
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Abstract
Breast cancer is among the most commonly diagnosed cancer types in women worldwide and is the second leading cause of cancer-related disease in the USA. SH2 domains recruit signaling proteins to phosphotyrosine residues on aberrantly activated growth factor and cytokine receptors and contribute to cancer cell cycling, metastasis, angiogenesis and so on. Herein we review phosphopeptide mimetic and small-molecule approaches targeting the SH2 domains of Grb2, Grb7 and STAT3 that inhibit their targets and reduce proliferation in in vitro breast cancer models. Only STAT3 inhibitors have been evaluated in in vivo models and have led to tumor reduction. Taken together, these studies suggest that targeting SH2 domains is an important approach to the treatment of breast cancer.
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Gril B, Vidal M, Assayag F, Poupon MF, Liu WQ, Garbay C. Grb2-SH3 ligand inhibits the growth of HER2+ cancer cells and has antitumor effects in human cancer xenografts alone and in combination with docetaxel. Int J Cancer 2007; 121:407-15. [PMID: 17372910 PMCID: PMC2755772 DOI: 10.1002/ijc.22674] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
HER2 represents an important signaling pathway in breast and other cancers. Herceptin has demonstrated clinical activity, but resistance is common. Thus, new therapeutic approaches to the HER2 pathway are needed. Grb2 is an adaptor protein involved in Ras-dependent signaling induced by HER2 receptors. A specific Grb2-SH3 ligand, designed and synthesized in our laboratory, called peptidimer-c, inhibited colony formation in HER2 overexpressing SKBr3 cancer cells. Combined treatment of peptidimer-c with docetaxel further inhibited both colony formation and tumor cell survival compared to docetaxel treatment alone. Efficacy of this combined treatment was correlated with a reduction in the phosphorylation of MAPK and AKT. Finally, peptidimer-c reduced the growth of a HER2(+) human breast cancer (BK111) xenograft in nude mice and potentiated the antitumor effect of docetaxel in a HER2+ hormone-independent human prostate adenocarcinoma (PAC120 HID28) xenograft. These results validate Grb2 as a new target for the HER2 pathway.
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Affiliation(s)
- Brunilde Gril
- PMC, Pharmacochimie Moléculaire et Cellulaire
CNRS : FRE2718INSERM : U648CNRS : IFR95Université Paris Descartes - Paris VFaculté de Médecine 45, rue des Saints-Pères 75270 PARIS CEDEX 06,FR
| | - Michel Vidal
- PMC, Pharmacochimie Moléculaire et Cellulaire
CNRS : FRE2718INSERM : U648CNRS : IFR95Université Paris Descartes - Paris VFaculté de Médecine 45, rue des Saints-Pères 75270 PARIS CEDEX 06,FR
| | - Franck Assayag
- DIGBFC, Dynamique de l'information génétique : bases fondamentales et cancer
CNRS : UMR7147INST CURIEUniversité Pierre et Marie Curie - Paris VIsection recherche 26 Rue d'Ulm 75248 PARIS CEDEX 05,FR
| | - Marie-France Poupon
- DIGBFC, Dynamique de l'information génétique : bases fondamentales et cancer
CNRS : UMR7147INST CURIEUniversité Pierre et Marie Curie - Paris VIsection recherche 26 Rue d'Ulm 75248 PARIS CEDEX 05,FR
| | - Wang-Qing Liu
- PMC, Pharmacochimie Moléculaire et Cellulaire
CNRS : FRE2718INSERM : U648CNRS : IFR95Université Paris Descartes - Paris VFaculté de Médecine 45, rue des Saints-Pères 75270 PARIS CEDEX 06,FR
| | - Christiane Garbay
- PMC, Pharmacochimie Moléculaire et Cellulaire
CNRS : FRE2718INSERM : U648CNRS : IFR95Université Paris Descartes - Paris VFaculté de Médecine 45, rue des Saints-Pères 75270 PARIS CEDEX 06,FR
- * Correspondence should be adressed to: Christiane Garbay
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Abstract
We identified 1113 articles (103 reviews, 1010 primary research articles) published in 2005 that describe experiments performed using commercially available optical biosensors. While this number of publications is impressive, we find that the quality of the biosensor work in these articles is often pretty poor. It is a little disappointing that there appears to be only a small set of researchers who know how to properly perform, analyze, and present biosensor data. To help focus the field, we spotlight work published by 10 research groups that exemplify the quality of data one should expect to see from a biosensor experiment. Also, in an effort to raise awareness of the common problems in the biosensor field, we provide side-by-side examples of good and bad data sets from the 2005 literature.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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Ye G, Ayrapetov M, Nam NH, Sun G, Parang K. Solid-phase binding assays of peptides using EGFP-Src SH2 domain fusion protein and biotinylated Src SH2 domain. Bioorg Med Chem Lett 2005; 15:4994-7. [PMID: 16169725 DOI: 10.1016/j.bmcl.2005.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2005] [Revised: 08/02/2005] [Accepted: 08/02/2005] [Indexed: 11/26/2022]
Abstract
Two solid-phase binding assays were designed and evaluated for their potential use in comparing the affinity of peptides to the Src SH2 domain. Resin beads attached to peptides were incubated with the enhanced green fluorescence protein(EGFP)-Src SH2 domain fusion protein or the biotinylated Src SH2 domain and extensively washed. The beads-attached tetrapeptides with high affinities to the EGFP-Src SH2 domain showed more fluorescence intensity than those beads containing tetrapeptides with weak binding affinities, as shown by fluorescence microscopy and fluorescence imaging system. Only the beads attached to pYEEI produced a dark purple color on incubation of the beads, respectively, with the biotinylated Src kinases SH2 domain, alkaline phosphatase-coupled streptavidin, and BCIP/NBT. These solid-phase binding assays may have potential applications for the screening of peptides for the Src kinases SH2 domains.
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Affiliation(s)
- Guofeng Ye
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, 41 Lower College Road, Kingston, RI 02881, USA
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