1
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Reyer A, Bazihizina N, Jaślan J, Scherzer S, Schäfer N, Jaślan D, Becker D, Müller TD, Pommerrenig B, Neuhaus HE, Marten I, Hedrich R. Sugar beet PMT5a and STP13 carriers suitable for proton-driven plasma membrane sucrose and glucose import in taproots. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 118:2219-2232. [PMID: 38602250 DOI: 10.1111/tpj.16740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/26/2024] [Accepted: 03/18/2024] [Indexed: 04/12/2024]
Abstract
Sugar beet (Beta vulgaris) is the major sugar-producing crop in Europe and Northern America, as the taproot stores sucrose at a concentration of around 20%. Genome sequence analysis together with biochemical and electrophysiological approaches led to the identification and characterization of the TST sucrose transporter driving vacuolar sugar accumulation in the taproot. However, the sugar transporters mediating sucrose uptake across the plasma membrane of taproot parenchyma cells remained unknown. As with glucose, sucrose stimulation of taproot parenchyma cells caused inward proton fluxes and plasma membrane depolarization, indicating a sugar/proton symport mechanism. To decipher the nature of the corresponding proton-driven sugar transporters, we performed taproot transcriptomic profiling and identified the cold-induced PMT5a and STP13 transporters. When expressed in Xenopus laevis oocytes, BvPMT5a was characterized as a voltage- and H+-driven low-affinity glucose transporter, which does not transport sucrose. In contrast, BvSTP13 operated as a high-affinity H+/sugar symporter, transporting glucose better than sucrose, and being more cold-tolerant than BvPMT5a. Modeling of the BvSTP13 structure with bound mono- and disaccharides suggests plasticity of the binding cleft to accommodate the different saccharides. The identification of BvPMT5a and BvSTP13 as taproot sugar transporters could improve breeding of sugar beet to provide a sustainable energy crop.
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Affiliation(s)
- Antonella Reyer
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
| | - Nadia Bazihizina
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
- Department of Agrifood Production and Environmental Sciences, Università degli Studi di Firenze, Florence, 50019, Sesto Fiorentino, Italy
| | - Justyna Jaślan
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
| | - Sönke Scherzer
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
| | - Nadine Schäfer
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
| | - Dawid Jaślan
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
- Faculty of Medicine, Walther Straub Institute of Pharmacology and Toxicology, Ludwig Maximilians-Universität, 80336, Munich, Germany
| | - Dirk Becker
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
| | - Thomas D Müller
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
| | - Benjamin Pommerrenig
- Plant Physiology, University of Kaiserslautern, 67663, Kaiserslautern, Germany
- Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Quedlinburg, 06484, Germany
| | - H Ekkehard Neuhaus
- Plant Physiology, University of Kaiserslautern, 67663, Kaiserslautern, Germany
| | - Irene Marten
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
| | - Rainer Hedrich
- Department of Molecular Plant Physiology and Biophysics, Biocenter, Julius-Maximilians-Universität (JMU), Würzburg, 97082, Germany
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2
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Ghosh P. Boronic Acid-Linked Cell-Penetrating Peptide for Protein Delivery. ACS OMEGA 2024; 9:19051-19056. [PMID: 38708278 PMCID: PMC11064025 DOI: 10.1021/acsomega.3c09689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 03/13/2024] [Accepted: 04/08/2024] [Indexed: 05/07/2024]
Abstract
Studying functional protein delivery into live cells is important, ranging from fundamental research to therapeutics. Cell-penetrating peptides (CPPs) are known to deliver proteins with applauded efficacy and have gained importance for applications in protein therapeutics and exploration of versatile cellular mechanisms. The primary aim of the work is to design a CPP as a tool and delivery vehicle for macromolecules, including proteins. In this work, boronic acid-linked cyclic deca arginine (cR10) is reported as an efficient CPP that exhibited 3-fold higher delivery of chemically synthesized ubiquitin (Ub) than pristine cR10-linked Ub, examined with live U2OS cells. As a futuristic plan, an artificial intelligence machine learning-based rationale has been designed and proposed.
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3
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Zhang W, Wang H, Luo Z, Jian Y, Gong C, Wang H, Lin X, Liu M, Wang Y, Shao H. Hitchhiking of Cas9 with nucleus-localized proteins impairs its controllability and leads to efficient genome editing of NLS-free Cas9. Mol Ther 2024; 32:920-934. [PMID: 38341611 PMCID: PMC11163216 DOI: 10.1016/j.ymthe.2024.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 01/09/2024] [Accepted: 02/07/2024] [Indexed: 02/12/2024] Open
Abstract
CRISPR-Cas9 is the most commonly used genome-editing tool in eukaryotic cells. To modulate Cas9 entry into the nucleus to enable control of genome editing, we constructed a light-controlled CRISPR-Cas9 system to control exposure of the Cas9 protein nuclear localization signal (NLS). Although blue-light irradiation was found to effectively control the entry of Cas9 protein into the nucleus with confocal microscopy observation, effective gene editing occurred in controls with next-generation sequencing analysis. To further clarify this phenomenon, a CRISPR-Cas9 editing system without the NLS and a CRISPR-Cas9 editing system containing a nuclear export signal were also constructed. Interestingly, both Cas9 proteins could achieve effective editing of target sites with significantly reduced off-target effects. Thus, we speculated that other factors might mediate Cas9 entry into the nucleus. However, NLS-free Cas9 was found to produce effective target gene editing even following inhibition of cell mitosis to prevent nuclear import caused by nuclear membrane disassembly. Furthermore, multiple nucleus-localized proteins were found to interact with Cas9, which could mediate the "hitchhiking" of NLS-free Cas9 into the nucleus. These findings will inform future attempts to construct controllable gene-editing systems and provide new insights into the evolution of the nucleus and compatible protein functions.
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Affiliation(s)
- Wenfeng Zhang
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China.
| | - Haozheng Wang
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Zhongtao Luo
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Yingzhen Jian
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Chenyu Gong
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Hui Wang
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Xinjian Lin
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Meilin Liu
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Yangmin Wang
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China
| | - Hongwei Shao
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, P.R. China; Biopharmaceutical Institute, Guangdong Pharmaceutical University, Guangzhou, P.R. China.
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4
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Xia Y, Wu K, Liu C, Zhao X, Wang J, Cao J, Chen Z, Fang M, Yu J, Zhu C, Zhang X, Wang Z. Filamentous-Actin-Mimicking Nanoplatform for Enhanced Cytosolic Protein Delivery. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2305600. [PMID: 38152963 PMCID: PMC10933650 DOI: 10.1002/advs.202305600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/29/2023] [Indexed: 12/29/2023]
Abstract
Despite the potential of protein therapeutics, the cytosolic delivery of proteins with high efficiency and bioactivity remains a significant challenge owing to exocytosis and lysosomal degradation after endocytosis. Therefore, it is important to develop a safe and efficient strategy to bypass endocytosis. Inspired by the extraordinary capability of filamentous-actin (F-actin) to promote cell membrane fusion, a cyanine dye assembly-containing nanoplatform mimicking the structure of natural F-actin is developed. The nanoplatform exhibits fast membrane fusion to cell membrane mimics and thus enters live cells through membrane fusion and bypasses endocytosis. Moreover, it is found to efficiently deliver protein cargos into live cells and quickly release them into the cytosol, leading to high protein cargo transfection efficiency and bioactivity. The nanoplatform also results in the superior inhibition of tumor cells when loaded with anti-tumor proteins. These results demonstrate that this fusogenic nanoplatform can be valuable for cytosolic protein delivery and tumor treatment.
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Affiliation(s)
- Yuqiong Xia
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
- Guangzhou Institute of TechnologyXidian UniversityGuangzhouGuangdong510555P. R. China
| | - Keyun Wu
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
- Guangzhou Institute of TechnologyXidian UniversityGuangzhouGuangdong510555P. R. China
| | - Chang Liu
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
- Guangzhou Institute of TechnologyXidian UniversityGuangzhouGuangdong510555P. R. China
| | - Xuejuan Zhao
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
- Guangzhou Institute of TechnologyXidian UniversityGuangzhouGuangdong510555P. R. China
| | - Jun Wang
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
| | - Jianxia Cao
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
| | - Zhaoxu Chen
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
| | - Minchao Fang
- Tianjin Key Laboratory of Function and Application of Biological Macromolecular StructuresSchool of Life SciencesTianjin University92 Weijin Road, Nankai DistrictTianjin300072P. R. China
| | - Jie Yu
- School of Biology and EngineeringGuizhou Medical UniversityGuizhouGuiyang550025P. R. China
| | - Cheng Zhu
- Tianjin Key Laboratory of Function and Application of Biological Macromolecular StructuresSchool of Life SciencesTianjin University92 Weijin Road, Nankai DistrictTianjin300072P. R. China
| | - Xianghan Zhang
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
- Guangzhou Institute of TechnologyXidian UniversityGuangzhouGuangdong510555P. R. China
| | - Zhongliang Wang
- Lab of Molecular Imaging and Translational Medicine (MITM)Engineering Research Center of Molecular & NeuroimagingMinistry of EducationSchool of Life Science and TechnologyXidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and TreatmentXi'anShaanxi710126P. R. China
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5
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Jeon T, Luther DC, Goswami R, Bell C, Nagaraj H, Anil Cicek Y, Huang R, Mas-Rosario JA, Elia JL, Im J, Lee YW, Liu Y, Scaletti F, Farkas ME, Mager J, Rotello VM. Engineered Polymer-siRNA Polyplexes Provide Effective Treatment of Lung Inflammation. ACS NANO 2023; 17:4315-4326. [PMID: 36802503 PMCID: PMC10627429 DOI: 10.1021/acsnano.2c08690] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Uncontrolled inflammation is responsible for acute and chronic diseases in the lung. Regulating expression of pro-inflammatory genes in pulmonary tissue using small interfering RNA (siRNA) is a promising approach to combatting respiratory diseases. However, siRNA therapeutics are generally hindered at the cellular level by endosomal entrapment of delivered cargo and at the organismal level by inefficient localization in pulmonary tissue. Here we report efficient anti-inflammatory activity in vitro and in vivo using polyplexes of siRNA and an engineered cationic polymer (PONI-Guan). PONI-Guan/siRNA polyplexes efficiently deliver siRNA cargo to the cytosol for highly efficient gene knockdown. Significantly, these polyplexes exhibit inherent targeting to inflamed lung tissue following intravenous administration in vivo. This strategy achieved effective (>70%) knockdown of gene expression in vitro and efficient (>80%) silencing of TNF-α expression in lipopolysaccharide (LPS)-challenged mice using a low (0.28 mg/kg) siRNA dosage.
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Affiliation(s)
- Taewon Jeon
- Molecular and Cellular Biology Graduate Program, University of Massachusetts Amherst, 230 Stockbridge Road, Amherst, Massachusetts, 01003, USA
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - David C. Luther
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Ritabrita Goswami
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Charlotte Bell
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, 661 N Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Harini Nagaraj
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Yagiz Anil Cicek
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Rui Huang
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Javier A. Mas-Rosario
- Molecular and Cellular Biology Graduate Program, University of Massachusetts Amherst, 230 Stockbridge Road, Amherst, Massachusetts, 01003, USA
| | - James L. Elia
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Jungkyun Im
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
- Department of Chemical Engineering, and Department of Electronic Materials, Devices, and Equipment Engineering, Soonchunhyang University, 22 Soonchunhyangro, Asan, 31538, Republic of Korea
| | - Yi-Wei Lee
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Yuanchang Liu
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Federica Scaletti
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Michelle E. Farkas
- Molecular and Cellular Biology Graduate Program, University of Massachusetts Amherst, 230 Stockbridge Road, Amherst, Massachusetts, 01003, USA
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Jesse Mager
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, 661 N Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Vincent M. Rotello
- Molecular and Cellular Biology Graduate Program, University of Massachusetts Amherst, 230 Stockbridge Road, Amherst, Massachusetts, 01003, USA
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
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6
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Ren L, Jiang L, Ren Q, Lv J, Zhu L, Cheng Y. A light-activated polymer with excellent serum tolerance for intracellular protein delivery. Chem Sci 2023; 14:2046-2053. [PMID: 36845943 PMCID: PMC9945510 DOI: 10.1039/d2sc05848k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 01/20/2023] [Indexed: 01/22/2023] Open
Abstract
The design of efficient materials for intracellular protein delivery has attracted great interest in recent years; however, most current materials for this purpose are limited by poor serum stability due to the early release of cargoes triggered by abundant serum proteins. Here, we propose a light-activated crosslinking (LAC) strategy to prepare efficient polymers with excellent serum tolerance for intracellular protein delivery. A cationic dendrimer engineered with photoactivatable O-nitrobenzene moieties co-assembles with cargo proteins via ionic interactions, followed by light activation to yield aldehyde groups on the dendrimer and the formation of imine bonds with cargo proteins. The light-activated complexes show high stability in buffer and serum solutions, but dis-assemble under low pH conditions. As a result, the polymer successfully delivers cargo proteins green fluorescent protein and β-galactosidase into cells with maintained bioactivity even in the presence of 50% serum. The LAC strategy proposed in this study provides a new insight to improve the serum stability of polymers for intracellular protein delivery.
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Affiliation(s)
- Lanfang Ren
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University Shanghai 200241 China
| | - Li Jiang
- School of Biomedical Engineering, Shanghai Jiaotong UniversityShanghai200240China
| | - Qianyi Ren
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University Shanghai 200241 China
| | - Jia Lv
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University Shanghai 200241 China
| | - Linyong Zhu
- School of Biomedical Engineering, Shanghai Jiaotong UniversityShanghai200240China
| | - Yiyun Cheng
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University Shanghai 200241 China
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7
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Algar WR, Szwarczewski A, Massey M. Are We There Yet? Intracellular Sensing with Luminescent Nanoparticles and FRET. Anal Chem 2023; 95:551-559. [PMID: 36595310 DOI: 10.1021/acs.analchem.2c03751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Combinations of luminescent nanoparticles (LNPs) and Förster resonance energy transfer (FRET) offer properties and features that are advantageous for sensing of biomolecular targets and activity. Despite a multitude of designs for LNP-FRET sensors, intracellular sensing applications are underdeveloped. We introduce readers to this field, summarize essential concepts, meta-analyze the literature, and offer a perspective on the bottleneck in LNP-FRET sensor development.
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Affiliation(s)
- W Russ Algar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Agnes Szwarczewski
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Melissa Massey
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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8
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Goswami R, Lehot V, Çiçek YA, Nagaraj H, Jeon T, Nguyen T, Fedeli S, Rotello VM. Direct Cytosolic Delivery of Citraconylated Proteins. Pharmaceutics 2023; 15:pharmaceutics15010218. [PMID: 36678847 PMCID: PMC9861219 DOI: 10.3390/pharmaceutics15010218] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/23/2022] [Accepted: 12/31/2022] [Indexed: 01/11/2023] Open
Abstract
Current intracellular protein delivery strategies face the challenge of endosomal entrapment and consequent degradation of protein cargo. Methods to efficiently deliver proteins directly to the cytosol have the potential to overcome this hurdle. Here, we report the use of a straightforward approach of protein modification using citraconic anhydride to impart an overall negative charge on the proteins, enabling them to assemble with positively charged nano vectors. This strategy uses anhydride-modified proteins to electrostatically form polymer-protein nanocomposites with a cationic guanidinium-functionalized polymer. These supramolecular self-assemblies demonstrated the efficient cytosolic delivery of modified proteins through a membrane fusion-like mechanism. This approach was validated on five cell lines and seven proteins as cargo. Retention of protein function was confirmed through efficient cell killing via the intracellular enzymatic activity of RNase A. This platform provides a versatile, straightforward, and single-step method of protein modification and efficient direct cytosolic protein delivery.
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Affiliation(s)
- Ritabrita Goswami
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Victor Lehot
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Yağız Anıl Çiçek
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Harini Nagaraj
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Taewon Jeon
- Molecular and Cellular Biology Graduate Program, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Terry Nguyen
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Stefano Fedeli
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA
- Correspondence:
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9
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Kapelner RA, Fisher RS, Elbaum-Garfinkle S, Obermeyer AC. Protein charge parameters that influence stability and cellular internalization of polyelectrolyte complex micelles. Chem Sci 2022; 13:14346-14356. [PMID: 36545145 PMCID: PMC9749388 DOI: 10.1039/d2sc00192f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 11/11/2022] [Indexed: 12/03/2022] Open
Abstract
Proteins are an important class of biologics, but there are several recurring challenges to address when designing protein-based therapeutics. These challenges include: the propensity of proteins to aggregate during formulation, relatively low loading in traditional hydrophobic delivery vehicles, and inefficient cellular uptake. This last criterion is particularly challenging for anionic proteins as they cannot cross the anionic plasma membrane. Here we investigated the complex coacervation of anionic proteins with a block copolymer of opposite charge to form polyelectrolyte complex (PEC) micelles for use as a protein delivery vehicle. Using genetically modified variants of the model protein green fluorescent protein (GFP), we evaluated the role of protein charge and charge localization in the formation and stability of PEC micelles. A neutral-cationic block copolymer, poly(oligoethylene glycol methacrylate-block-quaternized 4-vinylpyridine), POEGMA79-b-qP4VP175, was prepared via RAFT polymerization for complexation and microphase separation with the panel of engineered anionic GFPs. We found that isotropically supercharged proteins formed micelles at higher ionic strength relative to protein variants with charge localized to a polypeptide tag. We then studied GFP delivery by PEC micelles and found that they effectively delivered the protein cargo to mammalian cells. However, cellular delivery varied as a function of protein charge and charge distribution and we found an inverse relationship between the PEC micelle critical salt concentration and delivery efficiency. This model system has highlighted the potential of polyelectrolyte complexes to deliver anionic proteins intracellularly. Using this model system, we have identified requirements for the formation of PEC micelles that are stable at physiological ionic strength and that smaller protein-polyelectrolyte complexes effectively deliver proteins to Jurkat cells.
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Affiliation(s)
- Rachel A. Kapelner
- Department of Chemical Engineering, Columbia UniversityNew YorkNY 10027USA+1-212-853-1215
| | - Rachel S. Fisher
- Department of Chemical Engineering, Columbia UniversityNew YorkNY 10027USA+1-212-853-1215,Structural Biology Initiative, CUNY Advanced Science Research CenterNew YorkNYUSA
| | - Shana Elbaum-Garfinkle
- Structural Biology Initiative, CUNY Advanced Science Research CenterNew YorkNYUSA,PhD Programs in Biochemistry and Biology at the Graduate Center, City University of New YorkNYUSA
| | - Allie C. Obermeyer
- Department of Chemical Engineering, Columbia UniversityNew YorkNY 10027USA+1-212-853-1215
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10
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Saha A, Mandal S, Arafiles JVV, Gómez‐González J, Hackenberger CPR, Brik A. Structure-Uptake Relationship Study of DABCYL Derivatives Linked to Cyclic Cell-Penetrating Peptides for Live-Cell Delivery of Synthetic Proteins. Angew Chem Int Ed Engl 2022; 61:e202207551. [PMID: 36004945 PMCID: PMC9828537 DOI: 10.1002/anie.202207551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Indexed: 01/12/2023]
Abstract
Modifying cyclic cell-penetrating deca-arginine (cR10) peptides with 4-(4-dimethylaminophenylazo)benzoic acid (DABCYL) improves the uptake efficiency of synthetic ubiquitin (Ub) cargoes into living cells. To probe the role of the DABCYL moiety, we performed time-lapse microscopy and fluorescence lifetime imaging microscopy (FLIM) of fluorescent DABCYL-R10 to evaluate the impact on cell entry by the formation of nucleation zones. Furthermore, we performed a structure-uptake relationship study with 13 DABCYL derivatives coupled to CPP to examine their effect on the cell-uptake efficiency when conjugated to mono-Ub through disulfide linkages. Our results show that through structure variations of the DABCYL moiety alone we could reach, at nanomolar concentration, an additional threefold increase in the cytosolic delivery of Ub, which will enable studies on various intracellular processes related to Ub signaling.
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Affiliation(s)
- Abhishek Saha
- Schulich Faculty of ChemistryTechnion-Israel Institute of TechnologyHaifa3200008Israel
| | - Shaswati Mandal
- Schulich Faculty of ChemistryTechnion-Israel Institute of TechnologyHaifa3200008Israel
| | - Jan Vincent V. Arafiles
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)Robert-Rössle-Strasse 10Berlin13125Germany
| | - Jacobo Gómez‐González
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)Robert-Rössle-Strasse 10Berlin13125Germany
| | - Christian P. R. Hackenberger
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)Robert-Rössle-Strasse 10Berlin13125Germany
- Department of ChemistryHumboldt Universität zu BerlinBrook-Taylor-Str.2Berlin12489Germany
| | - Ashraf Brik
- Schulich Faculty of ChemistryTechnion-Israel Institute of TechnologyHaifa3200008Israel
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11
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Declas N, Maynard JRJ, Menin L, Gasilova N, Götze S, Sprague JL, Stallforth P, Matile S, Waser J. Tyrosine bioconjugation with hypervalent iodine. Chem Sci 2022; 13:12808-12817. [PMID: 36519034 PMCID: PMC9645396 DOI: 10.1039/d2sc04558c] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 10/03/2022] [Indexed: 01/24/2023] Open
Abstract
Hypervalent iodine reagents have recently emerged as powerful tools for late-stage peptide and protein functionalization. Herein we report a tyrosine bioconjugation methodology for the introduction of hypervalent iodine onto biomolecules under physiological conditions. Tyrosine residues were engaged in a selective addition onto the alkynyl bond of ethynylbenziodoxolones (EBX), resulting in stable vinylbenziodoxolones (VBX) bioconjugates. The methodology was successfully applied to peptides and proteins and tolerated all other nucleophilic residues, with the exception of cysteine. The generated VBX were further functionalized by palladium-catalyzed cross-coupling and azide-alkyne cycloaddition reactions. The method could be successfully used to modify bioactive natural products and native streptavidin to enable thiol-mediated cellular uptake.
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Affiliation(s)
- Nina Declas
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de LausanneCH-1015LausanneSwitzerland
| | - John R. J. Maynard
- Department of Organic Chemistry, University of Geneva1211 GenevaSwitzerland
| | - Laure Menin
- Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne, EPFL1015 LausanneSwitzerland
| | - Natalia Gasilova
- Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne, EPFL1015 LausanneSwitzerland
| | - Sebastian Götze
- Department of Paleobiotechnology, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI)07745 JenaGermany
| | - Jakob L. Sprague
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI)07745 JenaGermany
| | - Pierre Stallforth
- Department of Paleobiotechnology, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI)07745 JenaGermany
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva1211 GenevaSwitzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de LausanneCH-1015LausanneSwitzerland
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12
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Far-Red Fluorescent Murine Glioma Model for Accurate Assessment of Brain Tumor Progression. Cancers (Basel) 2022; 14:cancers14153822. [PMID: 35954485 PMCID: PMC9367351 DOI: 10.3390/cancers14153822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/29/2022] [Accepted: 08/02/2022] [Indexed: 12/22/2022] Open
Abstract
Glioma is the most common brain tumor, for which no significant improvement in life expectancy and quality of life is yet possible. The creation of stable fluorescent glioma cell lines is a promising tool for in-depth studies of the molecular mechanisms of glioma initialization and pathogenesis, as well as for the development of new anti-cancer strategies. Herein, a new fluorescent glioma GL261-kat cell line stably expressing a far-red fluorescent protein (TurboFP635; Katushka) was generated and characterized, and then validated in a mouse orthotopic glioma model. By using epi-fluorescence imaging, we detect the fluorescent glioma GL261-kat cells in mice starting from day 14 after the inoculation of glioma cells, and the fluorescence signal intensity increases as the glioma progresses. Tumor growth is confirmed by magnetic resonance imaging and histology. A gradual development of neurological deficit and behavioral alterations in mice is observed during glioma progression. In conclusion, our results demonstrate the significance and feasibility of using the novel glioma GL261-kat cell line as a model of glioma biology, which can be used to study the initialization of glioma and monitor its growth by lifetime non-invasive tracking of glioma cells, with the prospect of monitoring the response to anti-cancer therapy.
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13
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Mandal S, Brik A. Probing the cell delivery of synthetic diubiquitin chains. Chem Commun (Camb) 2022; 58:8782-8785. [PMID: 35837864 PMCID: PMC9350984 DOI: 10.1039/d2cc02476d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, the live-cell delivery of structurally different synthetic diubiquitin chains was examined. We found that the combination of structural variations of the Ub chains (intrinsic factors); nature of CPP and CPP-protein linkage (extrinsic factors) influence their delivery. In this study, the live-cell delivery of structurally different synthetic diubiquitin chains was examined.![]()
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Affiliation(s)
- Shaswati Mandal
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200008, Israel.
| | - Ashraf Brik
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200008, Israel.
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14
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Mathur D, Rogers KE, Díaz SA, Muroski ME, Klein WP, Nag OK, Lee K, Field LD, Delehanty JB, Medintz IL. Determining the Cytosolic Stability of Small DNA Nanostructures In Cellula. NANO LETTERS 2022; 22:5037-5045. [PMID: 35580267 PMCID: PMC9233082 DOI: 10.1021/acs.nanolett.2c00917] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
DNA nanostructures have proven potential in biomedicine. However, their intracellular interactions─especially cytosolic stability─remain mostly unknown and attempts to discern this are confounded by the complexities of endocytic uptake and entrapment. Here, we bypass the endocytic uptake and evaluate the DNA structural stability directly in live cells. Commonly used DNA structures─crosshairs and a tetrahedron─were labeled with a multistep Förster resonance energy transfer dye cascade and microinjected into the cytosol of transformed and primary cells. Energy transfer loss, as monitored by fluorescence microscopy, reported the structure's direct time-resolved breakdown in cellula. The results showed rapid degradation of the DNA crosshair within 20 min, while the tetrahedron remained consistently intact for at least 1 h postinjection. Nuclease assays in conjunction with a current understanding of the tetrahedron's torsional rigidity confirmed its higher stability. Such studies can inform design parameters for future DNA nanostructures where programmable degradation rates may be required.
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Affiliation(s)
- Divita Mathur
- College of Science, George Mason University, Fairfax, Virginia 22030, United States
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
| | - Katherine E Rogers
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Sebastián A Díaz
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
| | - Megan E Muroski
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
- American Society of Engineering Education, Washington, DC 20036, United States
| | - William P Klein
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
- National Research Council, Washington, DC 20001, United States
| | - Okhil K Nag
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
| | - Kwahun Lee
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
- American Society of Engineering Education, Washington, DC 20036, United States
| | - Lauren D Field
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
- National Research Council, Washington, DC 20001, United States
| | - James B Delehanty
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering Code 6900, US Naval Research Laboratory, Washington, DC 20375, United States
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15
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Luther DC, Nagaraj H, Goswami R, Çiçek YA, Jeon T, Gopalakrishnan S, Rotello VM. Direct Cytosolic Delivery of Proteins Using Lyophilized and Reconstituted Polymer-Protein Assemblies. Pharm Res 2022; 39:1197-1204. [PMID: 35297498 PMCID: PMC10587898 DOI: 10.1007/s11095-022-03226-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 03/04/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE Cytosolic delivery of proteins accesses intracellular targets for chemotherapy and immunomodulation. Current delivery systems utilize inefficient endosomal pathways of uptake and escape that lead to degradation of delivered cargo. Cationic poly(oxanorbornene)imide (PONI) polymers enable highly efficient cytosolic delivery of co-engineered proteins, but aggregation and denaturation in solution limits shelf life. In the present study we evaluate polymer-protein nanocomposite vehicles as candidates for lyophilization and point-of-care resuspension to provide a transferrable technology for cytosolic protein delivery. METHODS Self-assembled nanocomposites of engineered poly(glutamate)-tagged (E-tagged) proteins and guanidinium-functionalized PONI homopolymers were generated, lyophilized, and stored for 2 weeks. After reconstitution and delivery, cytosolic access of E-tagged GFP cargo (GFPE15) was assessed through diffuse cytosolic and nuclear fluorescence, and cell killing with chemotherapeutic enzyme Granzyme A (GrAE10). Efficiency was quantified between freshly prepared and lyophilized samples. RESULTS Reconstituted nanocomposites retained key structural features of freshly prepared assemblies, with minimal loss of material. Cytosolic delivery (> 80% efficiency of freshly prepared nanocomposites) of GFPE15 was validated in several cell lines, with intracellular access validated and quantified through diffusion into the nucleus. Delivery of GrAE10 elicited significant tumorigenic cell death. Intracellular access of cytotoxic protein was validated through cell viability. CONCLUSION Reconstituted nanocomposites achieved efficient cytosolic delivery of protein cargo and demonstrated therapeutic applicability with delivery of GrAE10. Overall, this strategy represents a versatile and highly translatable method for cytosolic delivery of proteins.
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Affiliation(s)
- David C Luther
- Department of Chemistry, University of Massachusetts, 379A LGRT Tower A, 710 North Pleasant St., Massachusetts, 01003, Amherst, USA
| | - Harini Nagaraj
- Department of Chemistry, University of Massachusetts, 379A LGRT Tower A, 710 North Pleasant St., Massachusetts, 01003, Amherst, USA
| | - Ritabrita Goswami
- Department of Chemistry, University of Massachusetts, 379A LGRT Tower A, 710 North Pleasant St., Massachusetts, 01003, Amherst, USA
| | - Yağız Anıl Çiçek
- Department of Chemistry, University of Massachusetts, 379A LGRT Tower A, 710 North Pleasant St., Massachusetts, 01003, Amherst, USA
| | - Taewon Jeon
- Department of Chemistry, University of Massachusetts, 379A LGRT Tower A, 710 North Pleasant St., Massachusetts, 01003, Amherst, USA
- Molecular and Cellular Biology Graduate Program, University of Massachusetts, 710 North Pleasant St., Massachusetts, 01003, Amherst, USA
| | - Sanjana Gopalakrishnan
- Department of Chemistry, University of Massachusetts, 379A LGRT Tower A, 710 North Pleasant St., Massachusetts, 01003, Amherst, USA
| | - Vincent M Rotello
- Department of Chemistry, University of Massachusetts, 379A LGRT Tower A, 710 North Pleasant St., Massachusetts, 01003, Amherst, USA.
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16
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Luther DC, Lee YW, Nagaraj H, Clark V, Jeon T, Goswami R, Gopalakrishnan S, Fedeli S, Jerome W, Elia JL, Rotello VM. Cytosolic Protein Delivery Using Modular Biotin-Streptavidin Assembly of Nanocomposites. ACS NANO 2022; 16:7323-7330. [PMID: 35435664 PMCID: PMC10586328 DOI: 10.1021/acsnano.1c06768] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Current strategies for the delivery of proteins into cells face general challenges of endosomal entrapment and concomitant degradation of protein cargo. Efficient delivery directly to the cytosol overcomes this obstacle: we report here the use of biotin-streptavidin tethering to provide a modular approach to the generation of nanovectors capable of a cytosolic delivery of biotinylated proteins. This strategy uses streptavidin to organize biotinylated protein and biotinylated oligo(glutamate) peptide into modular complexes that are then electrostatically self-assembled with a cationic guanidinium-functionalized polymer. The resulting polymer-protein nanocomposites demonstrate efficient cytosolic delivery of six biotinylated protein cargos of varying size, charge, and quaternary structure. Retention of protein function was established through efficient cell killing via delivery of the chemotherapeutic enzyme granzyme A. This platform represents a versatile and modular approach to intracellular delivery through the noncovalent tethering of multiple components into a single delivery vector.
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Affiliation(s)
- David C. Luther
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Yi-Wei Lee
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Harini Nagaraj
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Vincent Clark
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Taewon Jeon
- Molecular and Cellular Biology Graduate Program, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Ritabrita Goswami
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Sanjana Gopalakrishnan
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Stefano Fedeli
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - William Jerome
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - James L. Elia
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
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17
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Beach MA, Teo SLY, Chen MZ, Smith SA, Pouton CW, Johnston APR, Such GK. Quantifying the Endosomal Escape of pH-Responsive Nanoparticles Using the Split Luciferase Endosomal Escape Quantification Assay. ACS APPLIED MATERIALS & INTERFACES 2022; 14:3653-3661. [PMID: 34964593 DOI: 10.1021/acsami.1c18359] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
All nanoparticles have the potential to revolutionize the delivery of therapeutic cargo such as peptides, proteins, and RNA. However, effective cytosolic delivery of cargo from nanoparticles represents a significant challenge in the design of more efficient drug delivery vehicles. Recently, research has centered on designing nanoparticles with the capacity to escape endosomes by responding to biological stimuli such as changes in pH, which occur when nanoparticles are internalized into the endo-/lysosomal pathway. Current endosomal escape assays rely on indirect measurements and yield little quantitative information, which hinders the design of more efficient drug delivery vehicles. Therefore, we adapted the highly sensitive split luciferase endosomal escape quantification (SLEEQ) assay to better understand nanoparticle-induced endosomal escape. We applied SLEEQ to evaluate the endosomal escape behavior of two pH-responsive nanoparticles: the first with a poly(2-diisopropylamino ethyl methacrylate) (PDPAEMA) core and the second with 1:1 ratio of poly(2-diethylamino ethyl methacrylate) (PDEAEMA) and PDPAEMA. SLEEQ directly measured the cytosolic delivery and showed that engineering the nanoparticle disassembly pH could improve the endosomal escape efficiency by fivefold. SLEEQ is a versatile assay that can be used for a wide range of nanomaterials and will improve the development of drug delivery vehicles in the future.
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Affiliation(s)
- Maximilian A Beach
- Department of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Serena L Y Teo
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3010, Australia
| | - Moore Z Chen
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3010, Australia
| | - Samuel A Smith
- Department of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Colin W Pouton
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3010, Australia
| | - Angus P R Johnston
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3010, Australia
| | - Georgina K Such
- Department of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
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18
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Horn JM, Obermeyer AC. Genetic and Covalent Protein Modification Strategies to Facilitate Intracellular Delivery. Biomacromolecules 2021; 22:4883-4904. [PMID: 34855385 PMCID: PMC9310055 DOI: 10.1021/acs.biomac.1c00745] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Protein-based therapeutics represent a rapidly growing segment of approved disease treatments. Successful intracellular delivery of proteins is an important precondition for expanded in vivo and in vitro applications of protein therapeutics. Direct modification of proteins and peptides for improved cytosolic translocation are a promising method of increasing delivery efficiency and expanding the viability of intracellular protein therapeutics. In this Review, we present recent advances in both synthetic and genetic protein modifications for intracellular delivery. Active endocytosis-based and passive internalization pathways are discussed, followed by a review of modification methods for improved cytosolic delivery. After establishing how proteins can be modified, general strategies for facilitating intracellular delivery, such as chemical supercharging or inclusion of cell-penetrating motifs, are covered. We then outline protein modifications that promote endosomal escape. We finally examine the delivery of two potential classes of therapeutic proteins, antibodies and associated antibody fragments, and gene editing proteins, such as cas9.
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19
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Iqbal S, Luo B, Melamed JR, Day ES. Critical Evaluation of Different Lysosomal Labeling Methods Used to Analyze RNA Nanocarrier Trafficking in Cells. Bioconjug Chem 2021; 32:2245-2256. [PMID: 34543006 DOI: 10.1021/acs.bioconjchem.1c00405] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The use of nucleic acids to regulate gene expression is a rapidly developing field with immense clinical potential. Nanomaterials are frequently used to deliver nucleic acids into cells as they can overcome the poor cellular uptake and endo/lysosomal degradation of bare nucleic acids. For these nanocarriers to be effective, they must escape endo/lysosomal compartments to deliver their nucleic acid cargo into the cytosol (for ribonucleic acid (RNA)) or nucleus (for deoxyribonucleic acid (DNA)). This process is poorly understood and remains an area of active research toward the goal of developing effective delivery strategies. Fluorescent endo/lysosomal markers are among the most widely employed tools used to evaluate the endosomal escape of nucleic acid nanocarriers. However, the endo/lysosomal labeling method may alter the extent of and route of nanocarrier uptake by cells. The impact of these markers on cellular function and cell-nanocarrier interactions has not been probed in a systematic manner. To investigate this, we compared the effects of several common lysosomal labeling methods, namely, LysoTracker Red (LT Red), transient lysosomal-associated membrane protein 1-mutant green fluorescent protein (LAMP1-mGFP) transfection (Transient GFP), and stable lentiviral LAMP1-mGFP transfection (Stable GFP), on cellular metabolic activity, nanocarrier uptake, nanocarrier/lysosomal label colocalization, and gene silencing potency in U87 glioblastoma and MDA-MB-231 breast cancer cells using polyethyleneimine (PEI)/ribonucleic acid (RNA) polyplexes as a model nanocarrier. In both U87s and MDA-MB-231s, Transient GFP and LT Red labeling reduced metabolic activity relative to untransfected (Parental) cells, while Stable GFP labeling increased metabolic activity. Congruently, flow cytometry indicates Stable GFP cells have greater polyplex uptake than LT Red-labeled cells in both cell lines. Despite these similar trends in uptake, polyplex intracellular trafficking differs in the two cell lines, as confocal imaging revealed greater polyplex/lysosome colocalization in Stable GFP U87 cells than LT Red-labeled U87 cells, while the trend was reversed in MBA-MB-231s. The level of RNA-mediated gene silencing achieved in Parental versus Stable GFP U87 and MDA-MB-231 cells agreed with the observed levels of polyplex/lysosome colocalization, supporting the established concept that endosomal escape is the rate-limiting step for RNA interference. These findings indicate that lysosomal labels can profoundly alter cellular function and cell-nanocarrier interactions, presenting critical new considerations for researchers investigating nanoparticle trafficking.
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Affiliation(s)
- Shoaib Iqbal
- Department of Biomedical Engineering, University of Delaware, 161 Colburn Lab, Newark, Delaware 19716, United States
| | - Benjamin Luo
- Department of Biomedical Engineering, University of Delaware, 161 Colburn Lab, Newark, Delaware 19716, United States
| | - Jilian R Melamed
- Department of Biomedical Engineering, University of Delaware, 161 Colburn Lab, Newark, Delaware 19716, United States
| | - Emily S Day
- Department of Biomedical Engineering, University of Delaware, 161 Colburn Lab, Newark, Delaware 19716, United States.,Department of Materials Science & Engineering, University of Delaware, 201 DuPont Hall, Newark, Delaware 19716, United States.,Helen F. Graham Cancer Center & Research Institute, 4701 Ogletown Stanton Road, Newark, Delaware 19713, United States
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