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Chan A, Haley RM, Najar MA, Gonzalez-Martinez D, Bugaj LJ, Burslem GM, Mitchell MJ, Tsourkas A. Lipid-mediated intracellular delivery of recombinant bioPROTACs for the rapid degradation of undruggable proteins. Nat Commun 2024; 15:5808. [PMID: 38987546 PMCID: PMC11237011 DOI: 10.1038/s41467-024-50235-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 07/04/2024] [Indexed: 07/12/2024] Open
Abstract
Recently, targeted degradation has emerged as a powerful therapeutic modality. Relying on "event-driven" pharmacology, proteolysis targeting chimeras (PROTACs) can degrade targets and are superior to conventional inhibitors against undruggable proteins. Unfortunately, PROTAC discovery is limited by warhead scarcity and laborious optimization campaigns. To address these shortcomings, analogous protein-based heterobifunctional degraders, known as bioPROTACs, have been developed. Compared to small-molecule PROTACs, bioPROTACs have higher success rates and are subject to fewer design constraints. However, the membrane impermeability of proteins severely restricts bioPROTAC deployment as a generalized therapeutic modality. Here, we present an engineered bioPROTAC template able to complex with cationic and ionizable lipids via electrostatic interactions for cytosolic delivery. When delivered by biocompatible lipid nanoparticles, these modified bioPROTACs can rapidly degrade intracellular proteins, exhibiting near-complete elimination (up to 95% clearance) of targets within hours of treatment. Our bioPROTAC format can degrade proteins localized to various subcellular compartments including the mitochondria, nucleus, cytosol, and membrane. Moreover, substrate specificity can be easily reprogrammed, allowing modular design and targeting of clinically-relevant proteins such as Ras, Jnk, and Erk. In summary, this work introduces an inexpensive, flexible, and scalable platform for efficient intracellular degradation of proteins that may elude chemical inhibition.
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Affiliation(s)
- Alexander Chan
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
| | - Rebecca M Haley
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
| | - Mohd Altaf Najar
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Cancer Biology and Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - David Gonzalez-Martinez
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
| | - Lukasz J Bugaj
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
| | - George M Burslem
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Cancer Biology and Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Michael J Mitchell
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
- Penn Institute for RNA Innovation, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Andrew Tsourkas
- Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA.
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2
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Chan A, Tsourkas A. Intracellular Protein Delivery: Approaches, Challenges, and Clinical Applications. BME FRONTIERS 2024; 5:0035. [PMID: 38282957 PMCID: PMC10809898 DOI: 10.34133/bmef.0035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/14/2023] [Indexed: 01/30/2024] Open
Abstract
Protein biologics are powerful therapeutic agents with diverse inhibitory and enzymatic functions. However, their clinical use has been limited to extracellular applications due to their inability to cross plasma membranes. Overcoming this physiological barrier would unlock the potential of protein drugs for the treatment of many intractable diseases. In this review, we highlight progress made toward achieving cytosolic delivery of recombinant proteins. We start by first considering intracellular protein delivery as a drug modality compared to existing Food and Drug Administration-approved drug modalities. Then, we summarize strategies that have been reported to achieve protein internalization. These techniques can be broadly classified into 3 categories: physical methods, direct protein engineering, and nanocarrier-mediated delivery. Finally, we highlight existing challenges for cytosolic protein delivery and offer an outlook for future advances.
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Affiliation(s)
| | - Andrew Tsourkas
- Department of Bioengineering,
University of Pennsylvania, Philadelphia, PA, USA
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3
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Swart LE, Fens MHAM, van Oort A, Waranecki P, Mata Casimiro LD, Tuk D, Hendriksen M, van den Brink L, Schweighart E, Seinen C, Nelson R, Krippner-Heidenreich A, O'Toole T, Schiffelers RM, Kooijmans S, Heidenreich O. Increased Bone Marrow Uptake and Accumulation of Very-Late Antigen-4 Targeted Lipid Nanoparticles. Pharmaceutics 2023; 15:1603. [PMID: 37376052 DOI: 10.3390/pharmaceutics15061603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/17/2023] [Accepted: 05/25/2023] [Indexed: 06/29/2023] Open
Abstract
Lipid nanoparticles (LNPs) have evolved rapidly as promising delivery systems for oligonucleotides, including siRNAs. However, current clinical LNP formulations show high liver accumulation after systemic administration, which is unfavorable for the treatment of extrahepatic diseases, such as hematological disorders. Here we describe the specific targeting of LNPs to hematopoietic progenitor cells in the bone marrow. Functionalization of the LNPs with a modified Leu-Asp-Val tripeptide, a specific ligand for the very-late antigen 4 resulted in an improved uptake and functional siRNA delivery in patient-derived leukemia cells when compared to their non-targeted counterparts. Moreover, surface-modified LNPs displayed significantly improved bone-marrow accumulation and retention. These were associated with increased LNP uptake by immature hematopoietic progenitor cells, also suggesting similarly improved uptake by leukemic stem cells. In summary, we describe an LNP formulation that successfully targets the bone marrow including leukemic stem cells. Our results thereby support the further development of LNPs for targeted therapeutic interventions for leukemia and other hematological disorders.
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Affiliation(s)
- Laura E Swart
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - Marcel H A M Fens
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Anita van Oort
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - Piotr Waranecki
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - L Daniel Mata Casimiro
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - David Tuk
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - Martijn Hendriksen
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - Luca van den Brink
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - Elizabeth Schweighart
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - Cor Seinen
- CDL Research, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Ryan Nelson
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | | | - Tom O'Toole
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - Raymond M Schiffelers
- CDL Research, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Sander Kooijmans
- CDL Research, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Olaf Heidenreich
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
- Wolfson Childhood Cancer Research Centre, Newcastle University, Newcastle upon Tyne NE1 7RY, UK
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4
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Biswas A, Rajesh Y, Mitra P, Mandal M. ETV6 gene aberrations in non-haematological malignancies: A review highlighting ETV6 associated fusion genes in solid tumors. Biochim Biophys Acta Rev Cancer 2020; 1874:188389. [PMID: 32659251 DOI: 10.1016/j.bbcan.2020.188389] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/23/2020] [Accepted: 07/01/2020] [Indexed: 10/23/2022]
Abstract
ETV6 (translocation-Ets-leukemia virus) gene is a transcriptional repressor mainly involved in haematopoiesis and maintenance of vascular networks and has developed to be a major oncogene with the potential ability of forming fusion partners with many other genes with carcinogenic consequences. ETV6 fusions function primarily by constitutive activation of kinase activity of the fusion partners, modifications in the normal functions of ETV6 transcription factor, loss of function of ETV6 or the partner gene and activation of a proto-oncogene near the site of translocation. The role of ETV6 fusion gene in tumorigenesis has been well-documented and more variedly found in haematological malignancies. However, the role of the ETV6 oncogene in solid tumors has also risen to prominence due to an increasing number of cases being reported with this malignancy. Since, solid tumors can be well-targeted, the diagnosis of this genre of tumors based on ETV6 malignancy is of crucial importance for treatment. This review highlights the important ETV6 associated fusions in solid tumors along with critical insights as to existing and novel means of targeting it. A consolidation of novel therapies such as immune, gene, RNAi, stem cell therapy and protein degradation hitherto unused in the case of ETV6 solid tumor malignancies may open further therapeutic avenues.
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Affiliation(s)
- Angana Biswas
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Yetirajam Rajesh
- Department of Human and Molecular Genetics, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Pralay Mitra
- Department of Computer Science and Engineering, Indian institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Mahitosh Mandal
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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5
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Huang L, Huang J, Huang J, Xue H, Liang Z, Wu J, Chen C. Nanomedicine - a promising therapy for hematological malignancies. Biomater Sci 2020; 8:2376-2393. [PMID: 32314759 DOI: 10.1039/d0bm00129e] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hematological tumors are a group of diseases defined as the clonal proliferation of blood-forming cells. In recent years, incidences of hematological malignancies have increased. Traditional methods of diagnosing hematological tumors are primarily based on observing morphological features under light microscopy, and molecular diagnostics and immunological indicators are powerful auxiliary diagnostic methods. However, traditional methods cannot efficiently identify tumor markers and limit the efficiency and accuracy of diagnosis. Although treatment methods have been improved continuously, chemotherapy remains a primary technique for the treatment of hematological tumors. Traditional chemotherapy exhibits poor drug selectivity and lacks good biocompatibility and pharmacokinetic properties. The therapeutic effect is not ideal and the risk of toxic side effects is high. The nanosize and surface charge properties of nanodrugs are effective in improving drug delivery efficiency. The high load and rich surface modification methods of nanomaterials provide various possibilities for improving the biocompatibility and pharmacokinetics of drugs, as well as the targeting of drugs. In addition, a nanomedicine loading platform can load multiple drugs simultaneously and design the optimal proportion of combined drug schemes, which can improve the efficacy of drugs and reduce the occurrence of drug resistance. With their unique physical and chemical properties and biological characteristics, the application of nanoparticles in the diagnosis and treatment of hematological tumors has received considerable attention. In this review, we summarize recent advances in the application of various types of nanostructures for the diagnosis and treatment of hematological malignancies, investigate the advantages of nanomedicine compared with the traditional diagnosis and treatment of hematological tumors, and discuss their biological security and application prospects.
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Affiliation(s)
- Lifen Huang
- Department of Pediatrics, The Seventh Affiliated Hospital of Sun Yat-Sen University, Shenzhen 518107, China.
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6
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Panigrahi P, Jere A, Anamika K. FusionHub: A unified web platform for annotation and visualization of gene fusion events in human cancer. PLoS One 2018; 13:e0196588. [PMID: 29715310 PMCID: PMC5929557 DOI: 10.1371/journal.pone.0196588] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 04/16/2018] [Indexed: 12/15/2022] Open
Abstract
Gene fusion is a chromosomal rearrangement event which plays a significant role in cancer due to the oncogenic potential of the chimeric protein generated through fusions. At present many databases are available in public domain which provides detailed information about known gene fusion events and their functional role. Existing gene fusion detection tools, based on analysis of transcriptomics data usually report a large number of fusion genes as potential candidates, which could be either known or novel or false positives. Manual annotation of these putative genes is indeed time-consuming. We have developed a web platform FusionHub, which acts as integrated search engine interfacing various fusion gene databases and simplifies large scale annotation of fusion genes in a seamless way. In addition, FusionHub provides three ways of visualizing fusion events: circular view, domain architecture view and network view. Design of potential siRNA molecules through ensemble method is another utility integrated in FusionHub that could aid in siRNA-based targeted therapy. FusionHub is freely available at https://fusionhub.persistent.co.in.
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Affiliation(s)
| | - Abhay Jere
- LABS, Persistent Systems, Pingala-Aryabhata, Erandwane, Pune, India
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7
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Togtema M, Jackson R, Grochowski J, Villa PL, Mellerup M, Chattopadhyaya J, Zehbe I. Synthetic siRNA targeting human papillomavirus 16 E6: a perspective on in vitro nanotherapeutic approaches. Nanomedicine (Lond) 2018; 13:455-474. [PMID: 29382252 DOI: 10.2217/nnm-2017-0242] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
High-risk human papillomaviruses infect skin and mucosa, causing approximately 5% of cancers worldwide. In the search for targeted nanotherapeutic approaches, siRNAs against the viral E6 transcript have been molecules of interest but have not yet seen successful translation into the clinic. By reviewing the past approximately 15 years of in vitro literature, we identify the need for siRNA validation protocols which concurrently evaluate ranges of key treatment parameters as well as characterize downstream process restoration in a methodical, quantitative manner and demonstrate their implementation using our own data. We also reflect on the future need for more appropriate cell culture models to represent patient lesions as well as the application of personalized approaches to identify optimal treatment strategies.
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Affiliation(s)
- Melissa Togtema
- Probe Development & Biomarker Exploration, Thunder Bay Regional Health Research Institute, Thunder Bay, ON, P7B 6V4, Canada.,Biotechnology Program, Lakehead University, Thunder Bay, ON, P7B 5E1, Canada
| | - Robert Jackson
- Probe Development & Biomarker Exploration, Thunder Bay Regional Health Research Institute, Thunder Bay, ON, P7B 6V4, Canada.,Biotechnology Program, Lakehead University, Thunder Bay, ON, P7B 5E1, Canada
| | - Jessica Grochowski
- Probe Development & Biomarker Exploration, Thunder Bay Regional Health Research Institute, Thunder Bay, ON, P7B 6V4, Canada
| | - Peter L Villa
- Probe Development & Biomarker Exploration, Thunder Bay Regional Health Research Institute, Thunder Bay, ON, P7B 6V4, Canada.,Department of Biology, Lakehead University, Thunder Bay, ON, P7B 5E1, Canada
| | - Miranda Mellerup
- Probe Development & Biomarker Exploration, Thunder Bay Regional Health Research Institute, Thunder Bay, ON, P7B 6V4, Canada
| | - Jyoti Chattopadhyaya
- Program of Chemical Biology, Institute of Cell & Molecular Biology, Uppsala University, Uppsala, SE-75123, Sweden
| | - Ingeborg Zehbe
- Probe Development & Biomarker Exploration, Thunder Bay Regional Health Research Institute, Thunder Bay, ON, P7B 6V4, Canada.,Department of Biology, Lakehead University, Thunder Bay, ON, P7B 5E1, Canada
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8
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Quijano E, Bahal R, Ricciardi A, Saltzman WM, Glazer PM. Therapeutic Peptide Nucleic Acids: Principles, Limitations, and Opportunities. THE YALE JOURNAL OF BIOLOGY AND MEDICINE 2017; 90:583-598. [PMID: 29259523 PMCID: PMC5733847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Since their invention in 1991, peptide nucleic acids (PNAs) have been used in a myriad of chemical and biological assays. More recently, peptide nucleic acids have also been demonstrated to hold great potential as therapeutic agents because of their physiological stability, affinity for target nucleic acids, and versatility. While recent modifications in their design have further improved their potency, their preclinical development has reached new heights due to their combination with recent advancements in drug delivery. This review focuses on recent advances in PNA therapeutic applications, in which chemical modifications are made to improve PNA function and nanoparticles are used to enhance PNA delivery.
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Affiliation(s)
- Elias Quijano
- Department of Genetics, Yale University, New Haven, CT
| | - Raman Bahal
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT
| | - Adele Ricciardi
- Department of Biomedical Engineering, Yale University, New Haven, CT
| | - W. Mark Saltzman
- Department of Biomedical Engineering, Yale University, New Haven, CT
| | - Peter M. Glazer
- Department of Therapeutic Radiology, Yale University, New Haven, CT
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9
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Hazan-Halevy I, Landesman-Milo D, Rosenblum D, Mizrahy S, Ng BD, Peer D. Immunomodulation of hematological malignancies using oligonucleotides based-nanomedicines. J Control Release 2016; 244:149-156. [PMID: 27491881 DOI: 10.1016/j.jconrel.2016.07.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 07/24/2016] [Accepted: 07/29/2016] [Indexed: 10/21/2022]
Abstract
Hematological malignancies are a group of diseases characterized by clonal proliferation of blood-forming cells. Malignant blood cells are classified as myeloid or lymphoid cells depending on their stem cell origin. Lymphoid malignancies are characterized by lymphocyte accumulation in the blood stream, in the bone marrow, or in lymphatic nodes and organs. Several of these diseases are associated with chromosomal translocations, which cause gene fusion and amplification of expression, while others are characterized with aberrant expression of oncogenes. Overall, these genes play a major role in development and maintenance of malignant clones. The discovery of antisense oligonucleotides and RNA interference (RNAi) mechanisms offer new tools to specifically manipulate gene expression. Systemic delivery of inhibitory oligonucleotides molecules for manipulation of gene expression in lymphocytes holds a great potential for facilitating the development of an oligonucleotides -based therapy platform for lymphoid blood cancer. However, lymphocytes are among the most difficult targets for oligonucleotides delivery, as they are resistant to conventional transfection reagents and are dispersed throughout the body, making it difficult to successfully localize or deliver oligonucleotides payloads via systemic administration. In this review, we will survey the latest progress in the field of oligonucleotides based nanomedicine in the heterogeneous group of hematological malignancies with special emphasis on RNA based strategies. We will describe the most advanced non-viral nanocarriers for RNA delivery to malignant blood cells. We will also discuss targeted strategies for cell specific delivery of RNA molecules using nanoparticles and the therapeutic benefit of manipulating gene function in hematological malignancies. Finally, we will focus on the ex vivo, in vivo, and clinical trial strategies, that are currently under development in hematological malignancies - strategies that might increase the arsenal of drugs available to hematologists in the upcoming years.
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Affiliation(s)
- Inbal Hazan-Halevy
- Laboratory of Precision NanoMedicine, Dept. of Cell Research & Immunology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; Dept. of Materials Sciences and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel; Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv 69978, Israel
| | - Dalit Landesman-Milo
- Laboratory of Precision NanoMedicine, Dept. of Cell Research & Immunology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; Dept. of Materials Sciences and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel; Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv 69978, Israel
| | - Daniel Rosenblum
- Laboratory of Precision NanoMedicine, Dept. of Cell Research & Immunology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; Dept. of Materials Sciences and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel; Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv 69978, Israel
| | - Shoshy Mizrahy
- Laboratory of Precision NanoMedicine, Dept. of Cell Research & Immunology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; Dept. of Materials Sciences and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel; Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv 69978, Israel
| | - Brandon D Ng
- Laboratory of Precision NanoMedicine, Dept. of Cell Research & Immunology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; Dept. of Materials Sciences and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel; Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv 69978, Israel
| | - Dan Peer
- Laboratory of Precision NanoMedicine, Dept. of Cell Research & Immunology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; Dept. of Materials Sciences and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel; Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv 69978, Israel.
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