1
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Ghorai SM, Deep A, Magoo D, Gupta C, Gupta N. Cell-Penetrating and Targeted Peptides Delivery Systems as Potential Pharmaceutical Carriers for Enhanced Delivery across the Blood-Brain Barrier (BBB). Pharmaceutics 2023; 15:1999. [PMID: 37514185 PMCID: PMC10384895 DOI: 10.3390/pharmaceutics15071999] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 06/25/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Among the challenges to the 21st-century health care industry, one that demands special mention is the transport of drugs/active pharmaceutical agents across the blood-brain barrier (BBB). The epithelial-like tight junctions within the brain capillary endothelium hinder the uptake of most pharmaceutical agents. With an aim to understand more deeply the intricacies of cell-penetrating and targeted peptides as a powerful tool for desirable biological activity, we provide a critical review of both CPP and homing/targeted peptides as intracellular drug delivery agents, especially across the blood-brain barrier (BBB). Two main peptides have been discussed to understand intracellular drug delivery; first is the cell-penetrating peptides (CPPs) for the targeted delivery of compounds of interest (primarily peptides and nucleic acids) and second is the family of homing peptides, which specifically targets cells/tissues based on their overexpression of tumour-specific markers and are thus at the heart of cancer research. These small, amphipathic molecules demonstrate specific physical and chemical modifications aimed at increased ease of cellular internalisation. Because only a limited number of drug molecules can bypass the blood-brain barrier by free diffusion, it is essential to explore all aspects of CPPs that can be exploited for crossing this barrier. Considering siRNAs that can be designed against any target RNA, marking such molecules with high therapeutic potential, we present a synopsis of the studies on synthetic siRNA-based therapeutics using CPPs and homing peptides drugs that can emerge as potential drug-delivery systems as an upcoming requirement in the world of pharma- and nutraceuticals.
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Affiliation(s)
- Soma Mondal Ghorai
- Department of Zoology, Hindu College, University of Delhi, Delhi 110007, India
| | - Auroni Deep
- Department of Zoology, Hindu College, University of Delhi, Delhi 110007, India
| | - Devanshi Magoo
- Department of Chemistry, Hindu College, University of Delhi, Delhi 110007, India
| | - Chetna Gupta
- Department of Chemistry, Hansraj College, University of Delhi, Delhi 110007, India
| | - Nikesh Gupta
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison, WI 53705, USA
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2
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Chelluboina B, Vemuganti R. Gene Silencing in the Brain with siRNA to Promote Long-Term Post-Stroke Recovery. Methods Mol Biol 2023; 2616:419-425. [PMID: 36715950 DOI: 10.1007/978-1-0716-2926-0_29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
RNA interference is a promising strategy to degrade target RNAs of interest after stroke using small interfering RNA (siRNA). An optimized targeting such as combining a siRNA with a nontoxic transfection reagent that facilitates the effective delivery of siRNAs to the brain and subsequent cellular uptake after stroke is needed. Furthermore, an appropriate route of administration such as intravenous (tail vein or retro-orbital sinus) or cerebroventricular injection has to be used. Using siRNAs tagged with fluorescent probes shows the cellular uptake of siRNA. Efficacy and window of opportunity for a siRNA needs to be determined by testing multiple doses and time frame that alters the long-term functional outcomes. Real-time PCR/western blots can be used to determine the siRNA efficiency by evaluating the knockdown of the RNA/protein of interest. In siRNA studies, it is also essential to identify a proper dose (efficacious, but not toxic) by histopathologic testing to identify any toxicity in the peripheral organs and CNS. This chapter describes the strategies to deliver siRNAs to treat stroke and to facilitate post-stroke long-term recovery.
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Affiliation(s)
- Bharath Chelluboina
- Department of Neurological Surgery, University of Wisconsin, Madison, WI, USA.
| | - Raghu Vemuganti
- Department of Neurological Surgery, University of Wisconsin, Madison, WI, USA.,William S. Middleton Veterans Administration Hospital, Madison, WI, USA
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3
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Liyanage W, Wu T, Kannan S, Kannan RM. Dendrimer-siRNA Conjugates for Targeted Intracellular Delivery in Glioblastoma Animal Models. ACS APPLIED MATERIALS & INTERFACES 2022; 14:46290-46303. [PMID: 36214413 DOI: 10.1021/acsami.2c13129] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Small interfering RNAs (siRNAs) are potent weapons for gene silencing, with an opportunity to correct defective genes and stop the production of undesirable proteins, with many applications in central nervous system (CNS) disorders. However, successful delivery of siRNAs to the brain parenchyma faces obstacles such as the blood-brain barrier (BBB), brain tissue penetration, and targeting of specific cells. In addition, siRNAs are unstable under physiological conditions and are susceptible to protein binding and enzymatic degradation, necessitating a higher dosage to remain effective. To address these issues and advance siRNA delivery, we report the development of covalently conjugated hydroxyl-terminated poly(amidoamine) (PAMAM) dendrimer-siRNA conjugates, demonstrated with a siRNA against GFP (siGFP) conjugate (D-siGFP) utilizing glutathione-sensitive linkers. This allows for precise nucleic acid loading, protects the payload from premature degradation, delivers the siRNA cargo into cells, and achieves significant GFP knockdown in vitro (∼40%) and in vivo (∼30%). Compared to commercially available delivery systems such as RNAi Max and Lipofectamine, D-siGFP retains the potency of the siRNA in vitro. In addition, the dendrimer-siGFP conjugate significantly enhances the half-life of siRNA in the presence of plasma and endonucleases and maintains the passive targeting ability of PAMAM dendrimers to reactive microglia. When administered intratumorally to orthotopic glioblastoma multiform tumors (GBM) in CX3CR-1GFP mice, D-siGFP localizes in tumor-associated macrophages (TAMs) within the tumor parenchyma, minimizing off-target effects in other cell populations. The facile conjugation strategy for dendrimer-siRNA conjugates presented here offers a promising approach for targeted, systemic intracellular delivery of siRNA, serving as a potential bridge for the clinical translation of RNAi therapies.
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Affiliation(s)
- Wathsala Liyanage
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, United States
| | - Tony Wu
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, United States
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Sujatha Kannan
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, United States
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, United States
- Hugo W. Moser Research Institute at Kennedy Krieger, Inc., Baltimore, Maryland 21205, United States
- Kennedy Krieger Institute-Johns Hopkins University for Cerebral Palsy Research Excellence, Baltimore, Maryland 21218, United States
| | - Rangaramanujam M Kannan
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, United States
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Hugo W. Moser Research Institute at Kennedy Krieger, Inc., Baltimore, Maryland 21205, United States
- Kennedy Krieger Institute-Johns Hopkins University for Cerebral Palsy Research Excellence, Baltimore, Maryland 21218, United States
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4
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Shah P, Lalan M, Barve K. Intranasal delivery: An attractive route for the administration of nucleic acid based therapeutics for CNS disorders. Front Pharmacol 2022; 13:974666. [PMID: 36110526 PMCID: PMC9469903 DOI: 10.3389/fphar.2022.974666] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 08/04/2022] [Indexed: 11/13/2022] Open
Abstract
The etiologies of several cardiovascular, inflammatory, neurological, hereditary disorders, cancer, and infectious diseases have implicated changes in the genetic set up or genetic mutations as the root cause. Nucleic acid based therapeutics (NBTs) is a new class of biologics that are known to regulate gene expression at the transcriptional and post-transcriptional level. The NBTs include oligonucleotides, nucleosides, antisense RNA, small interfering RNAs, micro RNA etc. In recent times, this new category of biologics has found enormous potential in the management of cardiovascular, inflammatory, neurological disorders, cancer, infectious diseases and organ transplantation. However, the delivery of NBTs is highly challenging in terms of target specificity (intracellular delivery), mononuclear phagocyte system uptake, stability and biodistribution. Additionally, management of the above mentioned disorders require regular and intrusive therapy making non-invasive routes preferable in comparison to invasive routes like parenteral. The nasal route is garnering focus in delivery of NBTs to the brain in the management of several CNS disorders due to the associated merits such as non-invasiveness, possibility of chronic delivery, improved patient compliance, avoidance of hepatic and gastrointestinal metabolism as well as ability to bypass the BBB. Hence in recent times, this route has been sought by the reserachers as an alternative to parenteral therapy for the delivery of several NBTs. This review shall focus on an array of NBTs delivered through nasal route, their challenges, applications and opportunities. The novel delivery systems for incorporating NBTs; their targeting strategies shall be critically reviewed. The challenges towards regulatory approvals and commercialization shall also be discussed at large. Comparison of learnings derived from the success and barriers in nasal delivery of NBTs will help in identification of futuristic opportunities for their translation from bench to bedside.
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Affiliation(s)
- Pranav Shah
- Maliba Pharmacy College, Uka Tarsadia University, Surat, India
- *Correspondence: Pranav Shah,
| | - Manisha Lalan
- Maliba Pharmacy College, Uka Tarsadia University, Surat, India
| | - Kalyani Barve
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, SVKM’s Narsee Monjee Institute of Management Studies, Mumbai, Maharashtra, India
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5
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Vetter VC, Wagner E. Targeting nucleic acid-based therapeutics to tumors: Challenges and strategies for polyplexes. J Control Release 2022; 346:110-135. [PMID: 35436520 DOI: 10.1016/j.jconrel.2022.04.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/07/2022] [Accepted: 04/10/2022] [Indexed: 12/18/2022]
Abstract
The current medical reality of cancer gene therapy is reflected by more than ten approved products on the global market, including oncolytic and other viral vectors and CAR T-cells as ex vivo gene-modified cell therapeutics. The development of synthetic antitumoral nucleic acid therapeutics has been proceeding at a lower but steady pace, fueled by a plethora of alternative nucleic acid platforms (from various antisense oligonucleotides, siRNA, microRNA, lncRNA, sgRNA, to larger mRNA and DNA) and several classes of physical and chemical delivery technologies. This review summarizes the challenges and strategies for tumor-targeted nucleic acid delivery. Focusing primarily on polyplexes (polycation complexes) as nanocarriers, delivery options across multiple barriers into tumor cells are illustrated.
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Affiliation(s)
- Victoria C Vetter
- Pharmaceutical Biotechnology, Center for System-based Drug Research, Ludwig-Maximilians-Universität, Munich 81377, Germany
| | - Ernst Wagner
- Pharmaceutical Biotechnology, Center for System-based Drug Research, Ludwig-Maximilians-Universität, Munich 81377, Germany; Center for NanoScience (CeNS), Ludwig-Maximilians-Universität, Munich 81377, Germany.
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6
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Borrajo ML, Alonso MJ. Using nanotechnology to deliver biomolecules from nose to brain - peptides, proteins, monoclonal antibodies and RNA. Drug Deliv Transl Res 2022; 12:862-880. [PMID: 34731414 PMCID: PMC8888512 DOI: 10.1007/s13346-021-01086-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/20/2021] [Indexed: 02/06/2023]
Abstract
There is a growing number of biomolecules, including peptides, proteins, monoclonal antibodies and RNA, that could be potentially used for the treatment of central nervous system (CNS) diseases. However, the realization of their potential is being hampered by the extraordinary difficulties these complex biomolecules have to reach the brain in therapeutically meaningful amounts. Nose-to-brain (N-to-B) delivery is now being investigated as a potential option for the direct transport of biomolecules from the nasal cavity to different brain areas. Here, we discuss how different technological approaches enhance this N-to-B transport, with emphasis on those that have shown a potential for clinical translation. We also analyse how the physicochemical properties of nanocarriers and their modification with cell-penetrating peptides (CPPs) and targeting ligands affect their efficacy as N-to-B carriers for biomolecules.
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Affiliation(s)
- Mireya L Borrajo
- Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, Av. Barcelona s/n, Campus Vida, 15782, Santiago de Compostela, Spain
| | - María José Alonso
- Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, Av. Barcelona s/n, Campus Vida, 15782, Santiago de Compostela, Spain.
- Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
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7
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Desale K, Kuche K, Jain S. Cell-penetrating peptides (CPPs): an overview of applications for improving the potential of nanotherapeutics. Biomater Sci 2021; 9:1153-1188. [PMID: 33355322 DOI: 10.1039/d0bm01755h] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the field of nanotherapeutics, gaining cellular entry into the cytoplasm of the target cell continues to be an ultimate challenge. There are many physicochemical factors such as charge, size and molecular weight of the molecules and delivery vehicles, which restrict their cellular entry. Hence, to dodge such situations, a class of short peptides called cell-penetrating peptides (CPPs) was brought into use. CPPs can effectively interact with the cell membrane and can assist in achieving the desired intracellular entry. Such strategy is majorly employed in the field of cancer therapy and diagnosis, but now it is also used for other purposes such as evaluation of atherosclerotic plaques, determination of thrombin levels and HIV therapy. Thus, the current review expounds on each of these mentioned aspects. Further, the review briefly summarizes the basic know-how of CPPs, their utility as therapeutic molecules, their use in cancer therapy, tumor imaging and their assistance to nanocarriers in improving their membrane penetrability. The review also discusses the challenges faced with CPPs pertaining to their stability and also mentions the strategies to overcome them. Thus, in a nutshell, this review will assist in understanding how CPPs can present novel possibilities for resolving the conventional issues faced with the present-day nanotherapeutics.
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Affiliation(s)
- Kalyani Desale
- Centre for Pharmaceutical Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), S.A.S. Nagar, Punjab-160062, India.
| | - Kaushik Kuche
- Centre for Pharmaceutical Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), S.A.S. Nagar, Punjab-160062, India.
| | - Sanyog Jain
- Centre for Pharmaceutical Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), S.A.S. Nagar, Punjab-160062, India.
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8
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Letter to the Editor: Brain renin-angiotensin system and liver-directed siRNA targeted to angiotensinogen. Clin Sci (Lond) 2021; 135:907-910. [PMID: 33835151 DOI: 10.1042/cs20210163] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/20/2021] [Accepted: 03/29/2021] [Indexed: 12/19/2022]
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9
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LSD1-BDNF activity in lateral hypothalamus-medial forebrain bundle area is essential for reward seeking behavior. Prog Neurobiol 2021; 202:102048. [PMID: 33798614 DOI: 10.1016/j.pneurobio.2021.102048] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 03/06/2021] [Accepted: 03/25/2021] [Indexed: 12/24/2022]
Abstract
Reward induces activity-dependant gene expression and synaptic plasticity-related changes. Lysine-specific histone demethylase 1 (LSD1), a key enzyme driving histone modifications, regulates transcription in neural circuits of memory and emotional behavior. Herein, we focus on the role of LSD1 in modulating the expression of brain derived neurotrophic factor (BDNF), the master regulator of synaptic plasticity, in the lateral hypothalamus-medial forebrain bundle (LH-MFB) circuit during positive reinforcement. Rats, trained for intracranial self-stimulation (ICSS) via an electrode-cannula assembly in the LH-MFB area, were assayed for lever press activity, epigenetic parameters and dendritic sprouting. LSD1 expression and markers of synaptic plasticity like BDNF and dendritic arborization in the LH, showed distinct increase in conditioned animals. H3K4me2 levels at Bdnf IV and Bdnf IX promoters were increased in ICSS-conditioned rats, but H3K9me2 was decreased. While intra LH-MFB treatment with pan Lsd1 siRNA inhibited lever press activity, analyses of LH tissue showed reduction in BDNF expression and levels of H3K4me2 and H3K9me2. However, co-administration of BDNF peptide restored lever press activity mitigated by Lsd1 siRNA. BDNF expression in LH, driven by LSD1 via histone demethylation, may play an important role in reshaping the reward pathway and hold the key to decode the molecular basis of addiction.
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10
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Mendonça MCP, Kont A, Aburto MR, Cryan JF, O'Driscoll CM. Advances in the Design of (Nano)Formulations for Delivery of Antisense Oligonucleotides and Small Interfering RNA: Focus on the Central Nervous System. Mol Pharm 2021; 18:1491-1506. [PMID: 33734715 PMCID: PMC8824433 DOI: 10.1021/acs.molpharmaceut.0c01238] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
![]()
RNA-based therapeutics have emerged
as one of the most powerful
therapeutic options used for the modulation of gene/protein expression
and gene editing with the potential to treat neurodegenerative diseases.
However, the delivery of nucleic acids to the central nervous system
(CNS), in particular by the systemic route, remains a major hurdle.
This review will focus on the strategies for systemic delivery of
therapeutic nucleic acids designed to overcome these barriers. Pathways
and mechanisms of transport across the blood–brain barrier
which could be exploited for delivery are described, focusing in particular
on smaller nucleic acids including antisense oligonucleotides (ASOs)
and small interfering RNA (siRNA). Approaches used to enhance delivery
including chemical modifications, nanocarrier systems, and target
selection (cell-specific delivery) are critically analyzed. Learnings
achieved from a comparison of the successes and failures reported
for CNS delivery of ASOs versus siRNA will help identify opportunities
for a wider range of nucleic acids and accelerate the clinical translation
of these innovative therapies.
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Affiliation(s)
- Monique C P Mendonça
- Pharmacodelivery Group, School of Pharmacy, University College Cork, T12 YT20 Cork, Ireland
| | - Ayse Kont
- Pharmacodelivery Group, School of Pharmacy, University College Cork, T12 YT20 Cork, Ireland
| | - Maria Rodriguez Aburto
- APC Microbiome Ireland, University College Cork, T12 YT20 Cork, Ireland.,Department of Anatomy and Neuroscience, University College Cork, T12 XF62 Cork, Ireland
| | - John F Cryan
- APC Microbiome Ireland, University College Cork, T12 YT20 Cork, Ireland.,Department of Anatomy and Neuroscience, University College Cork, T12 XF62 Cork, Ireland
| | - Caitriona M O'Driscoll
- Pharmacodelivery Group, School of Pharmacy, University College Cork, T12 YT20 Cork, Ireland
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11
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Abstract
Cell-Penetrating Peptides (CPP) are valuable tools capable of crossing the plasma membrane to deliver therapeutic cargo inside cells. Small interfering RNAs (siRNA) are double-stranded RNA molecules capable of silencing the expression of a specific protein triggering the RNA interference (RNAi) pathway, but they are unable to cross the plasma membrane and have a short half-life in the bloodstream. In this overview, we assessed the many different approaches used and developed in the last two decades to deliver siRNA through the plasma membrane through different CPPs sorted according to three different loading strategies: covalent conjugation, complex formation, and CPP-decorated (functionalized) nanocomplexes. Each of these strategies has pros and cons, but it appears the latter two are the most commonly reported and emerging as the most promising strategies due to their simplicity of synthesis, use, and versatility. Recent progress with siRNA delivered by CPPs seems to focus on targeted delivery to reduce side effects and amount of drugs used, and it appears to be among the most promising use for CPPs in future clinical applications.
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12
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Maguregui A, Abe H. Developments in siRNA Modification and Ligand Conjugated Delivery To Enhance RNA Interference Ability. Chembiochem 2020; 21:1808-1815. [PMID: 32181563 DOI: 10.1002/cbic.202000009] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/05/2020] [Indexed: 12/24/2022]
Abstract
There is great potential for siRNA in the treatment of diseases through the reduction of damaging protein translation by RNA interference. However, the delivery and cell uptake of siRNA pose a serious problem in its therapeutic application. Methods to overcome this issue include chemical modification of the siRNA duplex to improve pharmacokinetics, stability and efficacy, and conjugation to small ligand molecules to enable membrane penetration, targetability and potency. In this review, the most common modifications of siRNA will be discussed, along with ligand conjugates that are believed to be the most promising in advancing the field of targeted siRNA delivery.
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Affiliation(s)
- Ander Maguregui
- Bioorganic Chemistry Laboratory, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya, Aichi, 464-0813, Japan
| | - Hiroshi Abe
- Bioorganic Chemistry Laboratory, Graduate School of Science, Nagoya University, Chikusa-Ku, Nagoya, Aichi, 464-8602, Japan
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Titze-de-Almeida SS, Soto-Sánchez C, Fernandez E, Koprich JB, Brotchie JM, Titze-de-Almeida R. The Promise and Challenges of Developing miRNA-Based Therapeutics for Parkinson's Disease. Cells 2020; 9:cells9040841. [PMID: 32244357 PMCID: PMC7226753 DOI: 10.3390/cells9040841] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 02/07/2023] Open
Abstract
MicroRNAs (miRNAs) are small double-stranded RNAs that exert a fine-tuning sequence-specific regulation of cell transcriptome. While one unique miRNA regulates hundreds of mRNAs, each mRNA molecule is commonly regulated by various miRNAs that bind to complementary sequences at 3’-untranslated regions for triggering the mechanism of RNA interference. Unfortunately, dysregulated miRNAs play critical roles in many disorders, including Parkinson’s disease (PD), the second most prevalent neurodegenerative disease in the world. Treatment of this slowly, progressive, and yet incurable pathology challenges neurologists. In addition to L-DOPA that restores dopaminergic transmission and ameliorate motor signs (i.e., bradykinesia, rigidity, tremors), patients commonly receive medication for mood disorders and autonomic dysfunctions. However, the effectiveness of L-DOPA declines over time, and the L-DOPA-induced dyskinesias commonly appear and become highly disabling. The discovery of more effective therapies capable of slowing disease progression –a neuroprotective agent–remains a critical need in PD. The present review focus on miRNAs as promising drug targets for PD, examining their role in underlying mechanisms of the disease, the strategies for controlling aberrant expressions, and, finally, the current technologies for translating these small molecules from bench to clinics.
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Affiliation(s)
- Simoneide S. Titze-de-Almeida
- Technology for Gene Therapy Laboratory, Central Institute of Sciences, FAV, University of Brasilia, Brasília 70910-900, Brazil;
| | - Cristina Soto-Sánchez
- Neuroprosthetics and Visual Rehabilitation Research Unit, Bioengineering Institute, Miguel Hernández University, 03202 Alicante, Spain; (C.S.-S.); (E.F.)
| | - Eduardo Fernandez
- Neuroprosthetics and Visual Rehabilitation Research Unit, Bioengineering Institute, Miguel Hernández University, 03202 Alicante, Spain; (C.S.-S.); (E.F.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine—CIBER-BBN, 28029 Madrid, Spain
| | - James B. Koprich
- Krembil Neuroscience Centre, Toronto Western Hospital, University Health Network, Toronto, Ontario M5T 2S8, Canada; (J.B.K.); (J.M.B.)
| | - Jonathan M. Brotchie
- Krembil Neuroscience Centre, Toronto Western Hospital, University Health Network, Toronto, Ontario M5T 2S8, Canada; (J.B.K.); (J.M.B.)
| | - Ricardo Titze-de-Almeida
- Technology for Gene Therapy Laboratory, Central Institute of Sciences, FAV, University of Brasilia, Brasília 70910-900, Brazil;
- Correspondence: ; Tel.: +55-61-3107-7222
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14
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Ashizawa AT, Holt J, Faust K, Liu W, Tiwari A, Zhang N, Ashizawa T. Intravenously Administered Novel Liposomes, DCL64, Deliver Oligonucleotides to Cerebellar Purkinje Cells. THE CEREBELLUM 2019; 18:99-108. [PMID: 29987489 DOI: 10.1007/s12311-018-0961-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cerebellar Purkinje cells (PCs) show conspicuous damages in many ataxic disorders. Targeted delivery of short nucleic acids, such as antisense oligonucleotides, to PCs may be a potential treatment for ataxic disorders, especially spinocerebellar ataxias (SCAs), which are mostly caused by a gain of toxic function of the mutant RNA or protein. However, oligonucleotides do not cross the blood-brain barrier (BBB), necessitating direct delivery into the central nervous system (CNS) through intra-thecal, intra-cisternal, intra-cerebral ventricular, or stereotactic parenchymal administration. We have developed a novel liposome (100 to 200 nm in diameter) formulation, DCL64, composed of dipalmitoyl-phosphatidylcholine, cholesterol, and poloxamer L64, which incorporates oligonucleotides efficiently (≥ 70%). Confocal microscopy showed that DCL64 was selectively taken up by brain microvascular endothelial cells by interacting with low-density lipoprotein receptor (LDLr) family members on cell surface, but not with other types of lipid receptors such as caveolin or scavenger receptor class B type 1. LDLr family members are implicated in brain microvascular endothelial cell endocytosis/transcytosis, and are abundantly localized on cerebellar PCs. Intravenous administration of DCL64 in normal mice showed distribution of oligonucleotides to the brain, preferentially in PCs. Mice that received DCL64 showed no adverse effect on hematological, hepatic, and renal functions in blood tests, and no histopathological abnormalities in major organs. These studies suggest that DCL64 delivers oligonucleotides to PCs across the BBB via intravenous injection with no detectable adverse effects. This property potentially makes DCL64 particularly attractive as a delivery vehicle in treatments of SCAs.
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Affiliation(s)
- Ana Tari Ashizawa
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA.,Department of Neuroscience, University of Florida, Gainesville, FL, USA.,Bio-Path Holdings, Inc., Bellaire, TX, USA
| | - Jenny Holt
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA.,Department of Neurology, University of Florida, Gainesville, FL, USA
| | - Kelsey Faust
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA.,Department of Neuroscience, University of Florida, Gainesville, FL, USA
| | - Weier Liu
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA.,Department of Neuroscience, University of Florida, Gainesville, FL, USA
| | - Anjana Tiwari
- Stanley H. Appel Department of Neurology, Houston Methodist Research Institute, 6670 Bertner Avenue, R11-117, Houston, TX, 77030, USA
| | - Nan Zhang
- Stanley H. Appel Department of Neurology, Houston Methodist Research Institute, 6670 Bertner Avenue, R11-117, Houston, TX, 77030, USA
| | - Tetsuo Ashizawa
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA. .,Department of Neurology, University of Florida, Gainesville, FL, USA. .,Stanley H. Appel Department of Neurology, Houston Methodist Research Institute, 6670 Bertner Avenue, R11-117, Houston, TX, 77030, USA.
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15
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Titze-de-Almeida R, Titze-de-Almeida SS, Ferreira NR, Fontanari C, Faccioli LH, Del Bel E. Suppressing nNOS Enzyme by Small-Interfering RNAs Protects SH-SY5Y Cells and Nigral Dopaminergic Neurons from 6-OHDA Injury. Neurotox Res 2019; 36:117-131. [PMID: 31041676 DOI: 10.1007/s12640-019-00043-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/27/2019] [Accepted: 04/04/2019] [Indexed: 01/11/2023]
Abstract
Nitric oxide (NO) has chemical properties that make it uniquely suitable as an intracellular and intercellular messenger. NO is produced by the activity of the enzyme nitric oxide synthases (NOS). There is substantial and mounting evidence that slight abnormalities of NO may underlie a wide range of neurodegenerative disorders. NO participates of the oxidative stress and inflammatory processes that contribute to the progressive dopaminergic loss in Parkinson's disease (PD). The present study aimed to evaluate in vitro and in vivo the effects of neuronal NOS-targeted siRNAs on the injury caused in dopaminergic neurons by the toxin 6-hidroxydopamine (6-OHDA). First, we confirmed (immunohistochemistry and Western blotting) that SH-SY5Y cell lineage expresses the dopaminergic marker tyrosine hydroxylase (TH) and the protein under analysis, neuronal NOS (nNOS). We designed four siRNAs by using the BIOPREDsi algorithm choosing the one providing the highest knockdown of nNOS mRNA in SH-SY5Y cells, as determined by qPCR. siRNA 4400 carried by liposomes was internalized into cells, caused a concentration-dependent knockdown on nNOS, and reduced the toxicity induced by 6-OHDA (p < 0.05). Regarding in vivo action in the dopamine-depleted animals, intra-striatal injection of siRNA 4400 at 4 days prior 6-OHDA produced a decrease in the rotational behavior induced by apomorphine. Finally, siRNA 4400 mitigated the loss of TH(+) cells in substantia nigra dorsal and ventral part. In conclusion, the suppression of nNOS enzyme by targeted siRNAs modified the progressive death of dopaminergic cells induced by 6-OHDA and merits further pre-clinical investigations as a neuroprotective approach for PD.
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Affiliation(s)
- Ricardo Titze-de-Almeida
- Technology for Gene Therapy Laboratory, Central Institute of Sciences, University of Brasília-FAV, Brasília, DF, 70910-900, Brazil
| | - Simoneide S Titze-de-Almeida
- Technology for Gene Therapy Laboratory, Central Institute of Sciences, University of Brasília-FAV, Brasília, DF, 70910-900, Brazil
| | - Nadia Rubia Ferreira
- Department of Basic and Oral Biology, Dental School, University of São Paulo (USP), Ribeirão Preto, SP, 14040-904, Brazil
| | - Caroline Fontanari
- Department of Clinical Analyses, Toxicology and Bromatology, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil
| | - Lúcia Helena Faccioli
- Department of Clinical Analyses, Toxicology and Bromatology, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil
| | - Elaine Del Bel
- Department of Basic and Oral Biology, Dental School, University of São Paulo (USP), Ribeirão Preto, SP, 14040-904, Brazil.
- Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo (USP), São Paulo, SP, Brazil.
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16
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Catuogno S, Esposito CL, Condorelli G, de Franciscis V. Nucleic acids delivering nucleic acids. Adv Drug Deliv Rev 2018; 134:79-93. [PMID: 29630917 DOI: 10.1016/j.addr.2018.04.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 02/20/2018] [Accepted: 04/03/2018] [Indexed: 01/07/2023]
Abstract
Nucleic acid therapeutics, including siRNAs, miRNAs/antimiRs, gRNAs and ASO, represent innovative and highly promising molecules for the safe treatment of a wide range of pathologies. The efficiency of systemic treatments is impeded by 1) the need to overcome physical and functional barriers in the organism, and 2) to accumulate in the intracellular active site at therapeutic concentrations. Although oligonucleotides either as modified naked molecules or complexed with delivery carriers have revealed to be effectively delivered to the affected target cells, this is restricted to topic treatments or to a few highly vascularized tissues. Therefore, the development of effective strategies for therapeutic nucleic acid selective delivery to target tissues is of primary importance in order to reduce the occurrence of undesired effects on non-target healthy tissues and to permit their translation to clinic. Due to their high affinity for specific ligands, high tissue penetration and chemical flexibility, short single-stranded nucleic acid aptamers are emerging as very attractive carriers for various therapeutic oligonucleotides. Yet, different aptamer-based bioconjugates, able to provide accumulation into target tissues, as well as efficient processing of therapeutic oligonucleotides, have been developed. In this respect, nucleic acid aptamer-mediated delivery strategies represent a powerful approach able to increase the therapeutic efficacy also highly reducing the overall toxicity. In this review, we will summarize recent progress in the field and discuss achieved objectives and optimization of aptamers as delivery carriers of short oligonucleotides.
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Affiliation(s)
- Silvia Catuogno
- Istituto di Endocrinologia ed Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (CNR), Naples, Italy
| | - Carla Lucia Esposito
- Istituto di Endocrinologia ed Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (CNR), Naples, Italy
| | - Gerolama Condorelli
- Istituto di Endocrinologia ed Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (CNR), Naples, Italy; Department of Molecular Medicine and Medical Biotechnology, "Federico II" University of Naples, Naples, Italy
| | - Vittorio de Franciscis
- Istituto di Endocrinologia ed Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (CNR), Naples, Italy.
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17
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Hu J, Qian H, Xue Y, Fu XD. PTB/nPTB: master regulators of neuronal fate in mammals. BIOPHYSICS REPORTS 2018; 4:204-214. [PMID: 30310857 PMCID: PMC6153489 DOI: 10.1007/s41048-018-0066-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Accepted: 07/21/2018] [Indexed: 01/15/2023] Open
Abstract
PTB was initially discovered as a polypyrimidine tract-binding protein (hence the name), which corresponds to a specific RNA-binding protein associated with heterogeneous ribonucleoprotein particle (hnRNP I). The PTB family consists of three members in mammalian genomes, with PTBP1 (PTB) expressed in most cell types, PTBP2 (also known as nPTB or brPTB) exclusively found in the nervous system, and PTBP3 (also known as ROD1) predominately detected in immune cells. During neural development, PTB is down-regulated, which induces nPTB, and the expression of both PTB and nPTB becomes diminished when neurons mature. This programed switch, which largely takes place at the splicing level, is critical for the development of the nervous system, with PTB playing a central role in neuronal induction and nPTB guarding neuronal maturation. Remarkably, sequential knockdown of PTB and nPTB has been found to be necessary and sufficient to convert non-neuronal cells to the neuronal lineage. These findings, coupled with exquisite understanding of the molecular circuits regulated by these RNA-binding proteins, establish a critical foundation for their future applications in regenerative medicine.
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Affiliation(s)
- Jing Hu
- 1Department of Cellular and Molecular Medicine, University of California, La Jolla, San Diego, CA 92093-0651 USA
| | - Hao Qian
- 1Department of Cellular and Molecular Medicine, University of California, La Jolla, San Diego, CA 92093-0651 USA
| | - Yuanchao Xue
- 2Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| | - Xiang-Dong Fu
- 1Department of Cellular and Molecular Medicine, University of California, La Jolla, San Diego, CA 92093-0651 USA.,2Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
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18
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Saha P, Gupta R, Sen T, Sen N. Activation of cyclin D1 affects mitochondrial mass following traumatic brain injury. Neurobiol Dis 2018; 118:108-116. [PMID: 30010002 DOI: 10.1016/j.nbd.2018.07.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 06/25/2018] [Accepted: 07/11/2018] [Indexed: 01/24/2023] Open
Abstract
Cell cycle activation has been associated with varying types of neurological disorders including brain injury. Cyclin D1 is a critical modulator of cell cycle activation and upregulation of Cyclin D1 in neurons contributes to the pathology associated with traumatic brain injury (TBI). Mitochondrial mass is a critical factor to maintain the mitochondrial function, and it can be regulated by different signaling cascades and transcription factors including NRF1. However, the underlying mechanism of how TBI leads to impairment of mitochondrial mass following TBI remains obscure. Our results indicate that augmentation of CyclinD1 attenuates mitochondrial mass formation following TBI. To elucidate the molecular mechanism, we found that Cyclin D1 interacts with a transcription factor NRF1 in the nucleus and prevents NRF1's interaction with p300 in the pericontusional cortex following TBI. As a result, the acetylation level of NRF1 was decreased, and its transcriptional activity was attenuated. This event leads to a loss of mitochondrial mass in the pericontusional cortex following TBI. Intranasal delivery of Cyclin D1 RNAi immediately after TBI rescues transcriptional activation of NRF1 and recovers mitochondrial mass after TBI.
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Affiliation(s)
- Pampa Saha
- Department of Neurological Surgery, University of Pittsburgh, 200 Lothrop Street, Scaife Hall, Pittsburgh 15213, United States
| | - Rajaneesh Gupta
- Department of Neurological Surgery, University of Pittsburgh, 200 Lothrop Street, Scaife Hall, Pittsburgh 15213, United States
| | - Tanusree Sen
- Department of Neurological Surgery, University of Pittsburgh, 200 Lothrop Street, Scaife Hall, Pittsburgh 15213, United States
| | - Nilkantha Sen
- Department of Neurological Surgery, University of Pittsburgh, 200 Lothrop Street, Scaife Hall, Pittsburgh 15213, United States.
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19
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Aziz HA, Abdel-Salam ASG, Al-Obaide MAI, Alobydi HW, Al-Humaish S. Kynurenine 3-Monooxygenase Gene Associated With Nicotine Initiation and Addiction: Analysis of Novel Regulatory Features at 5' and 3'-Regions. Front Genet 2018; 9:198. [PMID: 29951083 PMCID: PMC6008986 DOI: 10.3389/fgene.2018.00198] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/17/2018] [Indexed: 11/13/2022] Open
Abstract
Tobacco smoking is widespread behavior in Qatar and worldwide and is considered one of the major preventable causes of ill health and death. Nicotine is part of tobacco smoke that causes numerous health risks and is incredibly addictive; it binds to the α7 nicotinic acetylcholine receptor (α7nAChR) in the brain. Recent studies showed α7nAChR involvement in the initiation and addiction of smoking. Kynurenic acid (KA), a significant tryptophan metabolite, is an antagonist of α7nAChR. Inhibition of kynurenine 3-monooxygenase enzyme encoded by KMO enhances the KA levels. Modulating KMO gene expression could be a useful tactic for the treatment of tobacco initiation and dependence. Since KMO regulation is still poorly understood, we aimed to investigate the 5' and 3'-regulatory factors of KMO gene to advance our knowledge to modulate KMO gene expression. In this study, bioinformatics methods were used to identify the regulatory sequences associated with expression of KMO. The displayed differential expression of KMO mRNA in the same tissue and different tissues suggested the specific usage of the KMO multiple alternative promoters. Eleven KMO alternative promoters identified at 5'-regulatory region contain TATA-Box, lack CpG Island (CGI) and showed dinucleotide base-stacking energy values specific to transcription factor binding sites (TFBSs). The structural features of regulatory sequences can influence the transcription process and cell type-specific expression. The uncharacterized LOC105373233 locus coding for non-coding RNA (ncRNA) located on the reverse strand in a convergent manner at the 3'-side of KMO locus. The two genes likely expressed by a promoter that lacks TATA-Box harbor CGI and two TFBSs linked to the bidirectional transcription, the NRF1, and ZNF14 motifs. We identified two types of microRNA (miR) in the uncharacterized LOC105373233 ncRNA, which are like hsa-miR-5096 and hsa-miR-1285-3p and can target the miR recognition element (MRE) in the KMO mRNA. Pairwise sequence alignment identified 52 nucleotides sequence hosting MRE in the KMO 3' UTR untranslated region complementary to the ncRNA LOC105373233 sequence. We speculate that the identified miRs can modulate the KMO expression and together with alternative promoters at the 5'-regulatory region of KMO might contribute to the development of novel diagnostic and therapeutic algorithm for tobacco smoking.
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Affiliation(s)
- Hassan A Aziz
- College of Arts and Sciences, Qatar University, Doha, Qatar
| | | | - Mohammed A I Al-Obaide
- School of Medicine, Texas Tech University Health Sciences Center, Amarillo, TX, United States
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20
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Srimanee A, Arvanitidou M, Kim K, Hällbrink M, Langel Ü. Cell-penetrating peptides for siRNA delivery to glioblastomas. Peptides 2018; 104:62-69. [PMID: 29684592 DOI: 10.1016/j.peptides.2018.04.015] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/30/2018] [Accepted: 04/18/2018] [Indexed: 12/26/2022]
Abstract
Delivery of small interfering RNA (siRNA) to suppress glioblastoma growth is a hurdle due to the critical obstacles of the blood-brain barrier and the siRNA properties of such as high negative charges and instability in serum. Therefore, the passage of siRNA to targeted cells is limited. Several siRNA carriers have been constructed using cell-penetrating peptides (CPPs) since the CPPs have shown a high potential for oligonucleotide delivery into the cells. In this study, two CPPs, PepFect 14 (PF14) and the amphipathic peptide PepFect 28 (PF28), were modified with targeting peptides by covalent conjugation and non-covalent complex formation to improve glioma-targeted specificity and gene-silencing efficiency. In conclusion, we have established an efficient non-covalently complexed carrier (PF14:TG1) for siRNA delivery to human glioblastoma cells (U87), showing a significant two-fold increase in gene-silencing efficiency compared to the parent peptide PF14 and also improved specificity to U87 cells compared to non-glioma targeted cells.
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Affiliation(s)
- Artita Srimanee
- Department of Neurochemistry, The Arrhenius Laboratories for Natural Sciences, Stockholm University, SE-106 91, Stockholm, Sweden.
| | - Maria Arvanitidou
- Department of Neurochemistry, The Arrhenius Laboratories for Natural Sciences, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Kumjee Kim
- Department of Neurochemistry, The Arrhenius Laboratories for Natural Sciences, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Mattias Hällbrink
- Department of Neurochemistry, The Arrhenius Laboratories for Natural Sciences, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Ülo Langel
- Department of Neurochemistry, The Arrhenius Laboratories for Natural Sciences, Stockholm University, SE-106 91, Stockholm, Sweden; Institute of Technology, University of Tartu, Nooruse 1, 50411, Tartu, Estonia.
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21
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Osborn MF, Coles AH, Golebiowski D, Echeverria D, Moazami MP, Watts JK, Sena-Esteves M, Khvorova A. Efficient Gene Silencing in Brain Tumors with Hydrophobically Modified siRNAs. Mol Cancer Ther 2018; 17:1251-1258. [PMID: 29654062 DOI: 10.1158/1535-7163.mct-17-1144] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/01/2018] [Accepted: 04/03/2018] [Indexed: 02/06/2023]
Abstract
Glioblastoma (GBM) is the most common and lethal form of primary brain tumor with dismal median and 2-year survivals of 14.5 months and 18%, respectively. The paucity of new therapeutic agents stems from the complex biology of a highly adaptable tumor that uses multiple survival and proliferation mechanisms to circumvent current treatment approaches. Here, we investigated the potency of a new generation of siRNAs to silence gene expression in orthotopic brain tumors generated by transplantation of human glioma stem-like cells in athymic nude mice. We demonstrate that cholesterol-conjugated, nuclease-resistant siRNAs (Chol-hsiRNAs) decrease mRNA and silence luciferase expression by 90% in vitro in GBM neurospheres. Furthermore, Chol-hsiRNAs distribute broadly in brain tumors after a single intratumoral injection, achieving sustained and potent (>45% mRNA and >90% protein) tumor-specific gene silencing. This readily available platform is sequence-independent and can be adapted to target one or more candidate GBM driver genes, providing a straightforward means of modulating GBM biology in vivoMol Cancer Ther; 17(6); 1251-8. ©2018 AACR.
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Affiliation(s)
- Maire F Osborn
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, Massachusetts.,Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Andrew H Coles
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, Massachusetts.,Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Diane Golebiowski
- Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts.,Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Dimas Echeverria
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, Massachusetts.,Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Michael P Moazami
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, Massachusetts.,Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Jonathan K Watts
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, Massachusetts.,Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Miguel Sena-Esteves
- Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts. .,Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Anastasia Khvorova
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, Massachusetts. .,Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
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22
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Aptamer-siRNA Chimeras: Discovery, Progress, and Future Prospects. Biomedicines 2017; 5:biomedicines5030045. [PMID: 28792479 PMCID: PMC5618303 DOI: 10.3390/biomedicines5030045] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 08/02/2017] [Accepted: 08/03/2017] [Indexed: 02/07/2023] Open
Abstract
Synthetic nucleic acid ligands (aptamers) have emerged as effective delivery tools for many therapeutic oligonucleotide-based drugs, including small interfering RNAs (siRNAs). In this review, we summarize recent progress in the aptamer selection technology that has made possible the identification of cell-specific, cell-internalizing aptamers for the cell-targeted delivery of therapeutic oligonucleotides. In addition, we review the original, proof-of-concept aptamer-siRNA delivery studies and discuss recent advances in aptamer-siRNA conjugate designs for applications ranging from cancer therapy to the development of targeted antivirals. Challenges and prospects of aptamer-targeted siRNA drugs for clinical development are further highlighted.
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23
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Nikan M, Osborn MF, Coles AH, Biscans A, Godinho BM, Haraszti RA, Sapp E, Echeverria D, DiFiglia M, Aronin N, Khvorova A. Synthesis and Evaluation of Parenchymal Retention and Efficacy of a Metabolically Stable O-Phosphocholine-N-docosahexaenoyl-l-serine siRNA Conjugate in Mouse Brain. Bioconjug Chem 2017; 28:1758-1766. [PMID: 28462988 PMCID: PMC5578421 DOI: 10.1021/acs.bioconjchem.7b00226] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ligand-conjugated siRNAs have the potential to achieve targeted delivery and efficient silencing in neurons following local administration in the central nervous system (CNS). We recently described the activity and safety profile of a docosahexaenoic acid (DHA)-conjugated, hydrophobic siRNA (DHA-hsiRNA) targeting Huntingtin (Htt) mRNA in mouse brain. Here, we report the synthesis of an amide-modified, phosphocholine-containing DHA-hsiRNA conjugate (PC-DHA-hsiRNA), which closely resembles the endogenously esterified biological structure of DHA. We hypothesized that this modification may enhance neuronal delivery in vivo. We demonstrate that PC-DHA-hsiRNA silences Htt in mouse primary cortical neurons and astrocytes. After intrastriatal delivery, Htt-targeting PC-DHA-hsiRNA induces ∼80% mRNA silencing and 71% protein silencing after 1 week. However, PC-DHA-hsiRNA did not substantially outperform DHA-hsiRNA under the conditions tested. Moreover, at the highest locally administered dose (4 nmol, 50 μg), we observe evidence of PC-DHA-hsiRNA-mediated reactive astrogliosis. Lipophilic ligand conjugation enables siRNA delivery to neural tissues, but rational design of functional, nontoxic siRNA conjugates for CNS delivery remains challenging.
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Affiliation(s)
- Mehran Nikan
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Maire F. Osborn
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Andrew H. Coles
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Annabelle Biscans
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Bruno M.D.C. Godinho
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Reka A. Haraszti
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Ellen Sapp
- Department of Neurology, Mass General Institute for Neurodegenerative Disease, Charlestown, MA, USA
| | - Dimas Echeverria
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Marian DiFiglia
- Department of Neurology, Mass General Institute for Neurodegenerative Disease, Charlestown, MA, USA
| | - Neil Aronin
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Anastasia Khvorova
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
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24
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Gu J, Al-Bayati K, Ho EA. Development of antibody-modified chitosan nanoparticles for the targeted delivery of siRNA across the blood-brain barrier as a strategy for inhibiting HIV replication in astrocytes. Drug Deliv Transl Res 2017; 7:497-506. [DOI: 10.1007/s13346-017-0368-5] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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25
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Docosahexaenoic Acid Conjugation Enhances Distribution and Safety of siRNA upon Local Administration in Mouse Brain. MOLECULAR THERAPY-NUCLEIC ACIDS 2016; 5:e344. [PMID: 27504598 PMCID: PMC5023396 DOI: 10.1038/mtna.2016.50] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 06/02/2016] [Indexed: 11/29/2022]
Abstract
The use of siRNA-based therapies for the treatment of neurodegenerative disease requires efficient, nontoxic distribution to the affected brain parenchyma, notably the striatum and cortex. Here, we describe the synthesis and activity of a fully chemically modified siRNA that is directly conjugated to docosahexaenoic acid (DHA), the most abundant polyunsaturated fatty acid in the mammalian brain. DHA conjugation enables enhanced siRNA retention throughout both the ipsilateral striatum and cortex following a single, intrastriatal injection (ranging from 6–60 μg). Within these tissues, DHA conjugation promotes internalization by both neurons and astrocytes. We demonstrate efficient and specific silencing of Huntingtin mRNA expression in both the ipsilateral striatum (up to 73%) and cortex (up to 51%) after 1 week. Moreover, following a bilateral intrastriatal injection (60 μg), we achieve up to 80% silencing of a secondary target, Cyclophilin B, at both the mRNA and protein level. Importantly, DHA-hsiRNAs do not induce neural cell death or measurable innate immune activation following administration of concentrations over 20 times above the efficacious dose. Thus, DHA conjugation is a novel strategy for improving siRNA activity in mouse brain, with potential to act as a new therapeutic platform for the treatment of neurodegenerative disorders.
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26
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Nanoparticles for Targeting Intratumoral Hypoxia: Exploiting a Potential Weakness of Glioblastoma. Pharm Res 2016; 33:2059-77. [DOI: 10.1007/s11095-016-1947-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 05/12/2016] [Indexed: 02/07/2023]
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27
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Abstract
Cell-penetrating peptides provide a promising strategy for delivery of drugs across the blood-brain barrier. Here, we present an overview of CPP and peptide-mediated delivery to the central nervous system as well as a Transwell in vitro model to evaluate passage across an endothelial cell layer mimic of the blood-brain barrier.
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Affiliation(s)
- Artita Srimanee
- Department of Neurochemistry, Stockholm University, S.Arrheniusv. 16B, SE-106 91, Stockholm, Sweden,
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28
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Wang F, Zhang Y, He C, Wang T, Piao Q, Liu Q. Silencing the gene encoding C/EBP homologous protein lessens acute brain injury following ischemia/reperfusion. Neural Regen Res 2014; 7:2432-8. [PMID: 25337093 PMCID: PMC4200717 DOI: 10.3969/j.issn.1673-5374.2012.31.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 10/31/2012] [Indexed: 11/18/2022] Open
Abstract
C/EBP homologous protein, an important transcription factor during endoplasmic reticulum stress, participates in cell apoptosis mediated by endoplasmic reticulum stress. Previous studies have shown that C/EBP homologous protein mediates nerve injury during Alzheimer’s disease, subarachnoid hemorrhage and spinal cord trauma. In this study, we introduced C/EBP homologous protein short hairpin RNA into the brains of ischemia/reperfusion rat models via injection of lentiviral vector through the left lateral ventricle. Silencing C/EBP homologous protein gene expression significantly reduced cerebral infarction volume, decreased water content and tumor necrosis factor-α and interleukin-1β mRNA expression in brain tissues following infarction, diminished the number of TUNEL-positive cells in the infarct region, decreased caspase-3 protein content and increased Bcl-2 protein content. These results suggest that silencing C/EBP homologous protein lessens cell apoptosis and inflammatory reactions, thereby protecting nerves.
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Affiliation(s)
- Fengzhang Wang
- Department of Neurology, Bethune First Hospital, Jilin University, Changchun 130021, Jilin Province, China
| | - Yuan Zhang
- Department of Neonatology, Bethune First Hospital, Jilin University, Changchun 130021, Jilin Province, China
| | - Chunke He
- Department of Orthopedics, Jilin Hospital of Integrated Traditional and Western Medicine, Changchun 130021, Jilin Province, China
| | - Tingting Wang
- Department of Infectious Diseases, Zibo First Hospital, Zibo 255200, Shandong Province, China
| | - Qiyan Piao
- Department of Cardiology, General Hospital of China National Petroleum Corporation in Jilin, Jilin 132021, Jilin Province, China
| | - Qun Liu
- Department of Neurology, Bethune First Hospital, Jilin University, Changchun 130021, Jilin Province, China
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29
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Mohamed MS, Veeranarayanan S, Baliyan A, Poulose AC, Nagaoka Y, Minegishi H, Iwai S, Shimane Y, Yoshida Y, Maekawa T, Kumar DS. Structurally Distinct Hybrid Polymer/Lipid Nanoconstructs Harboring a Type-I Ribotoxin as Cellular Imaging and Glioblastoma-Directed Therapeutic Vectors. Macromol Biosci 2014; 14:1696-711. [DOI: 10.1002/mabi.201400248] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 07/26/2014] [Indexed: 11/06/2022]
Affiliation(s)
- M. Sheikh Mohamed
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Srivani Veeranarayanan
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Ankur Baliyan
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Aby Cheruvathoor Poulose
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Yutaka Nagaoka
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Hiroaki Minegishi
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Seiki Iwai
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Yasuhiro Shimane
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Yasuhiko Yoshida
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - Toru Maekawa
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
| | - D. Sakthi Kumar
- Bio Nano Electronics Research Center; Graduate School of Interdisciplinary New Science Toyo University; Kawagoe Saitama 350-8585 Japan
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30
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Abstract
RNA interference (RNAi) therapeutics appear to offer substantial opportunities for future therapy. However, post-administration RNAi effectors are typically unable to reach disease target cells in vivo without the assistance of a delivery system or vector. The main focus of this review is on lipid-based nanoparticle (LNP) delivery systems in current research and development that have at least been shown to act as effective delivery systems for functional delivery of RNAi effectors to disease target cells in vivo. The potential utility of these LNP delivery systems is growing rapidly, and LNPs are emerging as the preferred synthetic delivery systems in preclinical studies and current nonviral RNAi effector clinical trials. Moreover, studies on LNP-mediated delivery in vivo are leading to the emergence of useful biophysical parameters and physical organic chemistry rules that provide a framework for understanding in vivo delivery behaviors and outcomes. These same parameters and rules should also suggest ways and means to develop next generations of LNPs with genuine utility and long-term clinical viability.
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Affiliation(s)
- Andrew D Miller
- Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, Waterloo Campus, 150 Stamford Street, London SE1 9NH , UK and GlobalAcorn Limited , London , UK
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31
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Gherardini L, Bardi G, Gennaro M, Pizzorusso T. Novel siRNA delivery strategy: a new "strand" in CNS translational medicine? Cell Mol Life Sci 2014; 71:1-20. [PMID: 23508806 PMCID: PMC11113879 DOI: 10.1007/s00018-013-1310-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 02/18/2013] [Accepted: 02/19/2013] [Indexed: 12/12/2022]
Abstract
RNA interference has been envisaged as a powerful tool for molecular and clinical investigation with a great potential for clinical applications. In recent years, increased understanding of cancer biology and stem cell biology has dramatically accelerated the development of technology for cell and gene therapy in these areas. This paper is a review of the most recent report of innovative use of siRNA to benefit several central nervous system diseases. Furthermore, a description is made of innovative strategies of delivery into the brain by means of viral and non-viral vectors with high potential for translation into clinical use. Problems are also highlighted that might hamper the transition from bench to bed, analyzing the lack of reliable preclinical models with predictive validity and the lack of effective delivery systems, which are able to overcome biological barriers and specifically reach the brain site of action.
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Affiliation(s)
| | - Giuseppe Bardi
- Center for MicroBioRobotics @SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
| | | | - Tommaso Pizzorusso
- Institute of Neuroscience, CNR, Via Moruzzi, 1 56124 Pisa, Italy
- Department of Neuroscience, Psychology, Drug Research and Child Health NEUROFARBA, University of Florence, Florence, Italy
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32
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siRNA Treatment: "A Sword-in-the-Stone" for Acute Brain Injuries. Genes (Basel) 2013; 4:435-56. [PMID: 24705212 PMCID: PMC3924829 DOI: 10.3390/genes4030435] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 08/17/2013] [Accepted: 08/22/2013] [Indexed: 11/28/2022] Open
Abstract
Ever since the discovery of small interfering ribonucleic acid (siRNA) a little over a decade ago, it has been highly sought after for its potential as a therapeutic agent for many diseases. In this review, we discuss the promising possibility of siRNA to be used as a drug to treat acute brain injuries such as stroke and traumatic brain injury. First, we will give a brief and basic overview of the principle of RNA interference as an effective mechanism to decrease specific protein expression. Then, we will review recent in vivo studies describing siRNA research experiments/treatment options for acute brain diseases. Lastly, we will discuss the future of siRNA as a clinical therapeutic strategy against brain diseases and injuries, while addressing the current obstacles to effective brain delivery.
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33
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Zou LL, Ma JL, Wang T, Yang TB, Liu CB. Cell-penetrating Peptide-mediated therapeutic molecule delivery into the central nervous system. Curr Neuropharmacol 2013; 11:197-208. [PMID: 23997754 PMCID: PMC3637673 DOI: 10.2174/1570159x11311020006] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 08/10/2012] [Accepted: 12/14/2012] [Indexed: 01/09/2023] Open
Abstract
The blood-brain barrier (BBB), a dynamic and complex barrier formed by endothelial cells, can impede the entry of unwanted substances - pathogens and therapeutic molecules alike - into the central nervous system (CNS) from the blood circulation. Taking into account the fact that CNS-related diseases are the largest and fastest growing unmet medical concern, many potential protein- and nucleic acid-based medicines have been developed for therapeutic purposes. However, due to their poor ability to cross the BBB and the plasma membrane, the above-mentioned bio-macromolecules have limited use in treating neurological diseases. Finding effective, safe, and convenient ways to deliver therapeutic molecules into the CNS is thus urgently required. In recent decades, much effort has been expended in the development of drug delivery technologies, of which cell-penetrating peptides (CPPs) have the most promising potential. The present review covers the latest advances in CPP delivery technology, and provides an update on their use in CNS-targeted drug delivery.
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Affiliation(s)
- Li-Li Zou
- The Institute of Molecular Biology, Medical School of China Three
Gorges University, 8 Daxue Road, Yichang 443002, China
- Key Laboratory for Pathogenic Microorganism, Medical School of China Three Gorges University, 8 Daxue Road, Yichang 443002, China
| | - Jie-Lan Ma
- The Institute of Molecular Biology, Medical School of China Three
Gorges University, 8 Daxue Road, Yichang 443002, China
| | - Tao Wang
- The Institute of Molecular Biology, Medical School of China Three
Gorges University, 8 Daxue Road, Yichang 443002, China
| | - Tang-Bin Yang
- Key Laboratory for Pathogenic Microorganism, Medical School of China Three Gorges University, 8 Daxue Road, Yichang 443002, China
| | - Chang-Bai Liu
- The Institute of Molecular Biology, Medical School of China Three
Gorges University, 8 Daxue Road, Yichang 443002, China
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34
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Abstract
RNA interference is a relatively new tool used to silence specific genes in diverse biological systems. The development of this promising new technique for research and therapeutic use in studying and treating neurological diseases has been hampered by the lack of an efficient way to deliver siRNA transvascularly across the blood-brain barrier (BBB) to the central nervous system (CNS). Here we describe a method for delivering siRNA to the CNS by complexing it to a peptide that acts as a neuronal address by binding to acetylcholine receptors (AchRs). Adding cationic liposomes to the complex protects it from serum nucleases and proteases en route. When injected intravenously, these liposome-siRNA-peptide complexes resist serum degradation, effectively cross the BBB, and deliver siRNA to AchR-expressing cells to suppress protein expression in the CNS.
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Affiliation(s)
- Mark D Zabel
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA.
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35
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Newland B, Dowd E, Pandit A. Biomaterial approaches to gene therapies for neurodegenerative disorders of the CNS. Biomater Sci 2013; 1:556-576. [DOI: 10.1039/c3bm60030k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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36
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RNAi-based therapies for Huntington's disease: delivery challenges and opportunities. Ther Deliv 2012; 3:1061-76. [PMID: 23035592 DOI: 10.4155/tde.12.80] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Huntington's disease (HD) is a polyglutamine neurodegenerative disease caused by a mutation in the HTT gene coding for the Huntingtin protein (HTT). Unfortunately, there is no cure for HD and there is also no known way to modify the disease progression. RNAi approaches offer the promise of a certain degree of control over the disease. However, there are several challenges in potential use of RNAi in the treatment of HD. This article will discuss the details of RNAi technology as applied to the treatment of HD, and novel approaches to overcome the drug delivery challenges.
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37
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Ru Q, Shang BY, Miao QF, Li L, Wu SY, Gao RJ, Zhen YS. A cell penetrating peptide-integrated and enediyne-energized fusion protein shows potent antitumor activity. Eur J Pharm Sci 2012; 47:781-9. [PMID: 22982402 DOI: 10.1016/j.ejps.2012.09.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 08/20/2012] [Accepted: 09/03/2012] [Indexed: 01/19/2023]
Abstract
Arginine-rich peptides belong to a subclass of cell penetrating peptides that are taken up by living cells and can be detected freely diffusing inside the cytoplasm and nucleoplasm. This phenomenon has been attributed to either an endocytotic mode of uptake and a subsequent release from vesicles or a direct membrane penetration. Lidamycin is an antitumor antibiotic, which consists of an active enediyne chromophore (AE) and a noncovalently bound apoprotein (LDP). In the present study, a fusion protein (Arg)(9)-LDP composed of cell penetrating peptide (Arg)(9) and LDP was prepared by DNA recombination, and the enediyne-energized fusion protein (Arg)(9)-LDP-AE was prepared by molecular reconstitution. The data in fixed cells demonstrated that (Arg)(9)-LDP could rapidly enter cells, and the results based on fluorescence activated cell sorting indicated that the major route for (Arg)(9)-mediated cellular uptake of protein molecules was endocytosis. (Arg)(9)-LDP-AE demonstrated more potent cytotoxicity against different carcinoma cell lines than lidamycin in vitro. In the mouse hepatoma 22 model, (Arg)(9)-LDP-AE (0.3mg/kg) suppressed the tumor growth by 89.2%, whereas lidamycin (0.05 mg/kg) by 74.6%. Furthermore, in the glioma U87 xenograft model in nude mice, (Arg)(9)-LDP-AE at 0.2mg/kg suppressed tumor growth by 88.8%, compared with that of lidamycin by 62.9% at 0.05 mg/kg. No obvious toxic effects were observed in all groups during treatments. The results showed that energized fusion protein (Arg)(9)-LDP-AE was more effective than lidamycin and would be a promising candidate for glioma therapy. In addition, this approach to manufacturing fusion proteins might serve as a technology platform for the development of new cell penetrating peptides-based drugs.
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Affiliation(s)
- Qin Ru
- Department of Oncology, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Medical College, Beijing, PR China
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38
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Delivery of siRNA into the blood-brain barrier: recent advances and future perspective. Ther Deliv 2012; 3:417-20. [PMID: 22834073 DOI: 10.4155/tde.12.22] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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39
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Nucleic acids in human glioma treatment: innovative approaches and recent results. JOURNAL OF SIGNAL TRANSDUCTION 2012; 2012:735135. [PMID: 22685651 PMCID: PMC3364599 DOI: 10.1155/2012/735135] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 02/29/2012] [Indexed: 02/08/2023]
Abstract
Gliomas are the most common primary central nervous system tumors with a dismal prognosis. Despite recent advances in surgery, radiotherapy, and chemotherapy, current treatment regimens have a modest survival benefit. A crucial challenge is to deliver drugs effectively to invasive glioma cells residing in a sanctuary within the central nervous system. New therapies are essential, and oligonucleotide-based approaches, including antisense, microRNAs, small interfering RNAs, and nucleic acid aptamers, may provide a viable strategy. Thanks to their unique characteristics (low size, good affinity for the target, no immunogenicity, chemical structures that can be easily modified to improve their in vivo applications), these molecules may represent a valid alternative to antibodies particularly to overcome challenges presented by the blood-brain barrier. Here we will discuss recent results on the use of oligonucleotides that will hopefully provide new effective treatment for gliomas.
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40
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Ghafouri-Fard S, Modarressi MH. Expression of cancer-testis genes in brain tumors: implications for cancer immunotherapy. Immunotherapy 2012; 4:59-75. [PMID: 22150001 DOI: 10.2217/imt.11.145] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Cancer-testis (CT) genes have a restricted expression in normal tissues except testis and a wide range of tumor types. Testis is an immune-privileged site as a result of a blood barrier and lack of HLA class I expression on the surface of germ cells. Hence, if testis-specific genes are expressed in other tissues, they can be immunogenic. Expression of some CT genes in a high percentage of brain tumors makes them potential targets for immunotherapy. In addition, expression of CT genes in cancer stem cells may provide special targets for treatment of cancer recurrences and metastasis. The presence of antibodies against different CT genes in patients with advanced tumors has raised the possibility of polyvalent antitumor vaccine application.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran 19857-17443, Iran.
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41
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42
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Basheer M, Schwalb H, Shefler I, Levdansky L, Mekori YA, Gorodetsky R. Blood pressure modulation following activation of mast cells by cationic cell penetrating peptides. Peptides 2011; 32:2444-51. [PMID: 21971370 DOI: 10.1016/j.peptides.2011.09.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 09/20/2011] [Accepted: 09/20/2011] [Indexed: 11/18/2022]
Abstract
Short cell penetrating peptides (CPP) are widely used in vitro to transduce agents into cells. But their systemic effect has not been yet studied in detail. We studied the systemic effect of the cell penetrating peptides, penetratin, transportan and pro-rich, on rat hemodynamic functions. Intra-arterial monitoring of blood pressure showed that injection of the positively charged penetratin and transportan in a wide range of concentrations (2.5-320 μg/kg) caused highly significant transient decrease in the systolic and diastolic blood pressure in a dose dependent manner (p<0.01). Pretreatment with histamine receptors blockers or with cromolyn, a mast cell stabilizing agent, significantly attenuated this effect. Furthermore, in vitro incubation of these both peptides with mast cells line, LAD2, caused a massive mast cell degranulation. In vitro studies showed that these CPP in a wide range of concentrations were not cytotoxic without any effect on the survival of LAD2 mast cell line. In contrast, the less positively charged and proline-rich CPP, pro-rich, had no systemic effects with no effect on mast cell degranulation. Our results indicate that intravenously administrated positively charged CPP may have deleterious consequences due to their induced BP drop, mediated by mast cell activation. Therefore, the major effect of mast cell activation on BP should be considered in developing possible future drug therapies based on the injection of membrane-permeable and positively charged CPP. Nevertheless, lower levels of such CPP may be considered as a treatment of systemic high BP through moderate systemic mast cell activation.
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Affiliation(s)
- Maamoun Basheer
- Laboratory of Biotechnology and Radiobiology, Sharett Institute of Oncology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
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43
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Guo J, Bourre L, Soden DM, O'Sullivan GC, O'Driscoll C. Can non-viral technologies knockdown the barriers to siRNA delivery and achieve the next generation of cancer therapeutics? Biotechnol Adv 2011; 29:402-17. [DOI: 10.1016/j.biotechadv.2011.03.003] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 03/08/2011] [Accepted: 03/13/2011] [Indexed: 12/22/2022]
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44
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Hwang DW, Son S, Jang J, Youn H, Lee S, Lee D, Lee YS, Jeong JM, Kim WJ, Lee DS. A brain-targeted rabies virus glycoprotein-disulfide linked PEI nanocarrier for delivery of neurogenic microRNA. Biomaterials 2011; 32:4968-75. [PMID: 21489620 DOI: 10.1016/j.biomaterials.2011.03.047] [Citation(s) in RCA: 156] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 03/20/2011] [Indexed: 10/18/2022]
Abstract
Recent advances in efficient microRNA (miRNA) delivery techniques using brain-targeted nanoparticles offer critical information for understanding the functional role of miRNAs in vivo, and for supporting targeted gene therapy in terms of treating miRNA-associated neurological diseases. Here, we report the rabies virus glycoprotein (RVG)-labeled non-toxic SSPEI nanomaterials capable of neuron-specific miR-124a delivery to neuron in vivo. The RVG-labeled BPEI-SS (RVG-SSPEI) nanocarrier showed less toxicity in acetylcholine receptor-positive Neuro2a cells, and electrostatic interaction of RVG-SSPEI with miR-124a exhibited optimal transfection efficacy. The RVG-SSPEI polymer specifically targeted Neuro2a using cy5.5-miR-124a mixed with RVG-SSPEI. The functional action of miR-124a oligomers released from polyplexes in the cytoplasmic region was evaluated by a reporter vector containing a miR-124a -binding sequence, and showed a significantly reduced reporter signal in a dose-dependent manner. Cy5.5-miR-124a/RVG-SSPEI- injected into mice via tail veins displayed the enhanced accumulation of miR-124a in the isolated brain. Hindrance of the efficient penetration of neuronal cells by size limitation of the miR-124a/RVG-SSPEI improved with the help of mannitol through blood-brain barrier disruption. These findings indicated that the RVG peptide combined with mannitol infusion using SSPEI polymer for neuron-specific targeting in vivo is sufficient to deliver neurogenic microRNA into the brain.
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Affiliation(s)
- Do Won Hwang
- Department of Nuclear Medicine, College of Medicine, Seoul National University Hospital, 28 Yongon-Dong, Jongno-Gu, Seoul 110-744, Republic of Korea
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45
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Abstract
IMPORTANCE OF THE FIELD Despite numerous advances made during the last decade in brain tumor therapy, the prognosis of glioblastoma has not improved and these tumors inevitably recur with no effective treatment. Thus, any new therapeutic strategy to target this most malignant tumor will be of significant benefit. RNAi is a powerful gene silencing method that might be used in combination with other agents to improve the efficacy of glioblastoma treatment. AREAS COVERED IN THIS REVIEW Recent progress and challenges of pre-clinical and clinical research of RNAi therapy for glioblastoma. The review covers literature from 2003 to 2009. WHAT THE READER WILL GAIN The principle of RNA interference therapy, three categories of RNAi triggers, different RNAi delivery system and pre-clinical and clinical studies that are currently underway to evaluate the validity of RNAi as a potential therapeutic strategy against glioblastoma are discussed. TAKE HOME MESSAGE RNA inference therapy combined with other therapeutics may offer therapeutic potential for glioblastoma multiforme. Further studies are required to develop more efficient and specific delivery systems, select suitable gene targets, optimize treatment dose and administration schedule, evaluate the efficacy of combination treatment strategies, establish a validated clinical response measure system etc.
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Affiliation(s)
- Dongsheng Guo
- Department of Neurosurgery, Huazhong University of Sciences and Technology, Tongji Medical College, Tongji Hospital, Wuhan, China.
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46
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Effects of combining low frequency ultrasound irradiation with papaverine on the permeability of the blood–tumor barrier. J Neurooncol 2010; 102:213-24. [DOI: 10.1007/s11060-010-0321-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2009] [Accepted: 07/19/2010] [Indexed: 12/17/2022]
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47
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Targeting individual calpain isoforms for neuroprotection. Exp Neurol 2010; 226:6-7. [PMID: 20682310 DOI: 10.1016/j.expneurol.2010.07.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2010] [Accepted: 07/23/2010] [Indexed: 12/20/2022]
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48
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Abstract
Delivering polynucleotides into animals has been a major challenge facing their success as therapeutic agents. Given the matured understanding of antibody‐mediated delivery techniques, it is possible to rationally design delivery vehicles that circulate in the blood stream and are specifically delivered into target organs. If the targeting moiety is designed to contain the cargo of an RNAi mediator without impacting its paratope, directed delivery can be achieved. In this article, we review the state of art in delivery technology for RNA mediators and address how this technique could soon be used to enhance the efficacy of the numerous small RNA therapeutic programs currently under evaluation. Copyright © 2010 John Wiley & Sons, Ltd. This article is categorized under:
Regulatory RNAs/RNAi/Riboswitches > RNAi: Mechanisms of Action RNA Methods > RNA Analyses in Cells RNA in Disease and Development > RNA in Disease
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Affiliation(s)
- Lance P Ford
- Bioo Scientific, 3913 Todd Lane Suite 312, Austin, TX 78744, USA.
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49
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Antoniou X, Borsello T. Cell Permeable Peptides: A Promising Tool to Deliver Neuroprotective Agents in the Brain. Pharmaceuticals (Basel) 2010; 3:379-392. [PMID: 27713257 PMCID: PMC4033915 DOI: 10.3390/ph3020379] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Revised: 01/20/2010] [Accepted: 01/28/2010] [Indexed: 12/03/2022] Open
Abstract
The inability of most drugs to cross the blood-brain barrier and/or plasma membrane limits their use for biomedical applications in the brain. Cell Permeable Peptides (CPPs) overcome this problem and are effective in vivo, crossing the plasma membrane and the blood-brain barrier. CPPs deliver a wide variety of compounds intracellularly in an active form. In fact, many bioactive cargoes have neuroprotective properties, and due to their ability to block protein-protein interactions, offer exciting perspectives in the clinical setting. In this review we give an overview of the Cell Permeable Peptides strategy to deliver neuroprotectants against neurodegeneration in the CNS.
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Affiliation(s)
- Xanthi Antoniou
- Istituto di Ricerche Farmacologiche "Mario Negri", Via La Masa 19, 20157 Milano, Italy.
| | - Tiziana Borsello
- Istituto di Ricerche Farmacologiche "Mario Negri", Via La Masa 19, 20157 Milano, Italy.
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50
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RNAi as a new therapeutic strategy against HCV. Biotechnol Adv 2010; 28:27-34. [PMID: 19729057 DOI: 10.1016/j.biotechadv.2009.08.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Revised: 08/18/2009] [Accepted: 08/20/2009] [Indexed: 12/23/2022]
Abstract
Hepatitis C virus is a major cause of liver associated diseases all over the world. Irrespective of the significant advances in the current therapy, drugs and vaccines are restricted with many factors such as toxicity, complexity, cost and resistance. New technologies particularly RNA interference (RNAi) mediated by small interfering RNA (siRNA) have become more and more interesting and effective therapeutic entities to silence pathogenic gene products associated with disease, including cancer, viral infections and autoimmune disorders. RNAi works at a posttranscriptional level by targeting mRNA as a mean for inhibiting the synthesis of the encoded protein. Several reports have indicated the efficiency and specificity of synthetic and vector based siRNAs inhibiting HCV replication. In the present review, we focused on the recent development in the potential use and issues regarding siRNA as a therapy for HCV.
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