1
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Kimourtzis G, Rangwani N, Jenkins BJ, Jani S, McNaughton PA, Raouf R. Prostaglandin E2 depolarises sensory axons in vitro in an ANO1 and Nav1.8 dependent manner. Sci Rep 2024; 14:17360. [PMID: 39075089 PMCID: PMC11286870 DOI: 10.1038/s41598-024-67793-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 07/16/2024] [Indexed: 07/31/2024] Open
Abstract
Prostaglandin E2 (PGE2) is a major contributor to inflammatory pain hyperalgesia, however, the extent to which it modulates the activity of nociceptive axons is incompletely understood. We developed and characterized a microfluidic cell culture model to investigate sensitisation of the axons of dorsal root ganglia neurons. We show that application of PGE2 to fluidically isolated axons leads to sensitisation of their responses to depolarising stimuli. Interestingly the application of PGE2 to the DRG axons elicited a direct and persistent spiking activity propagated to the soma. Both the persistent activity and the membrane depolarisation in the axons are abolished by the EP4 receptor inhibitor and a blocker of cAMP synthesis. Further investigated into the mechanisms of the spiking activity showed that the PGE2 evoked depolarisation was inhibited by Nav1.8 sodium channel blockers but was refractory to the application of TTX or zatebradine. Interestingly, the depolarisation of axons was blocked by blocking ANO1 channels with T16Ainh-A01. We further show that PGE2-elicited axonal responses are altered by the changes in chloride gradient within the axons following treatment with bumetanide a Na-K-2Cl cotransporter NKCC1 inhibitor, but not by VU01240551 an inhibitor of potassium-chloride transporter KCC2. Our data demonstrate a novel role for PGE2/EP4/cAMP pathway which culminates in a sustained depolarisation of sensory axons mediated by a chloride current through ANO1 channels. Therefore, using a microfluidic culture model, we provide evidence for a potential dual function of PGE2 in inflammatory pain: it sensitises depolarisation-evoked responses in nociceptive axons and directly triggers action potentials by activating ANO1 and Nav1.8 channels.
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Affiliation(s)
- Georgios Kimourtzis
- Wolfson Sensory, Pain and Regeneration Centre (SPaRC), Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, UK
| | - Natasha Rangwani
- Wolfson Sensory, Pain and Regeneration Centre (SPaRC), Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, UK
| | - Bethan J Jenkins
- Wolfson Sensory, Pain and Regeneration Centre (SPaRC), Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, UK
| | - Siddharth Jani
- Wolfson Sensory, Pain and Regeneration Centre (SPaRC), Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, UK
| | - Peter A McNaughton
- Wolfson Sensory, Pain and Regeneration Centre (SPaRC), Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, UK
| | - Ramin Raouf
- Wolfson Sensory, Pain and Regeneration Centre (SPaRC), Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, UK.
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2
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Liu M, Wu A, Liu J, Zhao Y, Dong X, Sun T, Shi Q, Wang H. TPP-Based Microfluidic Chip Design and Fabrication Method for Optimized Nerve Cells Directed Growth. CYBORG AND BIONIC SYSTEMS 2024; 5:0095. [PMID: 38725973 PMCID: PMC11079595 DOI: 10.34133/cbsystems.0095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 01/12/2024] [Indexed: 05/12/2024] Open
Abstract
Microfluidic chips offer high customizability and excellent biocompatibility, holding important promise for the precise control of biological growth at the microscale. However, the microfluidic chips employed in the studies of regulating cell growth are typically fabricated through 2D photolithography. This approach partially restricts the diversity of cell growth platform designs and manufacturing efficiency. This paper presents a method for designing and manufacturing neural cell culture microfluidic chips (NCMC) using two-photon polymerization (TPP), where the discrete and directional cell growth is optimized through studying the associated geometric parameters of on-chip microchannels. This study involves simulations and discussions regarding the effects of different hatching distances on the mold surface topography and printing time in the Describe print preview module, which determines the appropriate printing accuracy corresponding to the desired mold structure. With the assistance of the 3D maskless lithography system, micron-level rapid printing of target molds with different dimensions were achieved. For NCMC with different geometric parameters, COMSOL software was used to simulate the local flow velocity and shear stress characteristics within the microchannels. SH-SY5Y cells were selected for directional differentiation experiments on NCMC with different geometric parameters. The results demonstrate that the TPP-based manufacturing method efficiently constructs neural microfluidic chips with high precision, optimizing the discrete and directional cell growth. We anticipate that our method for designing and manufacturing NCMC will hold great promise in construction and application of microscale 3D drug models.
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Affiliation(s)
- Menghua Liu
- Intelligent Robotics Institute, School of Mechatronical Engineering,
Beijing Institute of Technology, Beijing 100081, China
| | - Anping Wu
- Intelligent Robotics Institute, School of Mechatronical Engineering,
Beijing Institute of Technology, Beijing 100081, China
| | - Jiaxin Liu
- Intelligent Robotics Institute, School of Mechatronical Engineering,
Beijing Institute of Technology, Beijing 100081, China
| | - Yanfeng Zhao
- Intelligent Robotics Institute, School of Mechatronical Engineering,
Beijing Institute of Technology, Beijing 100081, China
| | - Xinyi Dong
- Intelligent Robotics Institute, School of Mechatronical Engineering,
Beijing Institute of Technology, Beijing 100081, China
| | - Tao Sun
- School of Medical Technology,
Beijing Institute of Technology, Beijing 100081, China
| | - Qing Shi
- Beijing Advanced Innovation Center for Intelligent Robots and Systems,
Beijing Institute of Technology, Beijing 100081, China
| | - Huaping Wang
- Key Laboratory of Biomimetic Robots and Systems (Beijing Institute of Technology), Ministry of Education, Beijing 100081, China
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3
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Han X, Matsuda N, Ishibashi Y, Shibata M, Suzuki I. An In Vitro Assessment Method for Chemotherapy-Induced Peripheral Neurotoxicity Caused by Anti-Cancer Drugs Based on Electrical Measurement of Impedance Value and Spontaneous Activity. Pharmaceutics 2023; 15:2788. [PMID: 38140128 PMCID: PMC10748260 DOI: 10.3390/pharmaceutics15122788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023] Open
Abstract
Chemotherapy-induced peripheral neurotoxicity (CIPN) is a major adverse event of anti-cancer drugs, which still lack standardized measurement and treatment methods. In the present study, we attempted to evaluate neuronal dysfunctions in cultured rodent primary peripheral neurons using a microelectrode array system. After exposure to typical anti-cancer drugs (i.e., paclitaxel, vincristine, oxaliplatin, and bortezomib), we successfully detected neurotoxicity in dorsal root ganglia neurons by measuring electrical activities, including impedance value and spontaneous activity. The impedance value decreased significantly for all compounds, even at low concentrations, which indicated cell loss and/or neurite degeneration. The spontaneous activity was also suppressed after exposure, which suggested neurotoxicity again. However, an acute response was observed for paclitaxel and bortezomib before toxicity, which showed different mechanisms based on compounds. Therefore, MEA measurement of impedance value could provide a simple assessment method for CIPN, combined with neuronal morphological changes.
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Affiliation(s)
| | | | | | | | - Ikuro Suzuki
- Department of Electronics, Graduate School of Engineering, Tohoku Institute of Technology, 35-1 Yagiyama Kasumicho, Taihaku-ku, Sendai 9828577, Japan; (X.H.); (N.M.); (Y.I.); (M.S.)
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4
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Albin B, Qubbaj K, Tiwari AP, Adhikari P, Yang IH. Mitochondrial trafficking as a protective mechanism against chemotherapy drug-induced peripheral neuropathy: Identifying the key site of action. Life Sci 2023; 334:122219. [PMID: 37907151 DOI: 10.1016/j.lfs.2023.122219] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 10/25/2023] [Accepted: 10/25/2023] [Indexed: 11/02/2023]
Abstract
AIMS Chemotherapy induced peripheral neuropathy (CIPN) is a common side effect seen in patients who have undergone most chemotherapy treatments to which there are currently no treatment methods. CIPN has been shown to cause axonal degeneration leading to Peripheral Neuropathy (PN), which can lead to major dosage reduction and may prevent further chemotherapy treatment due to oftentimes debilitating pain. Previously, we have determined the site-specific action of Paclitaxel (PTX), a microtubule targeting agent, as well as the neuroprotective effect of Fluocinolone Acetonide (FA) against Paclitaxel Induced Peripheral Neuropathy (PIPN). MAIN METHODS Mitochondrial trafficking analysis was determined for all sample sets, wherein FA showed enhanced anterograde (axonal) mitochondrial trafficking leading to neuroprotective effects for all samples. KEY FINDINGS Using this system, we demonstrate that PTX, Monomethyl auristatin E (MMAE), and Vincristine (VCR), are toxic at clinically prescribed levels when treated focally to axons. However, Cisplatin (CDDP) was determined to have a higher toxicity when treated to cell bodies. Although having different targeting mechanisms, the administration of FA was determined to have a significant neuroprotective effect for against all chemotherapy drugs tested. SIGNIFICANCE This study identifies key insights regarding site of action and neuroprotective strategies to further development as potential therapeutics against CIPN. FA was treated alongside each chemotherapy drug to identify the neuroprotective effect against CIPN, where FA was found to be neuroprotective for all drugs tested. This study found that treatment with FA led to an enhancement in the anterograde movement of mitochondria based on fluorescent imaging.
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Affiliation(s)
- Bayne Albin
- Center for Biomedical Engineering and Science, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC 28223, United States
| | - Khayzaran Qubbaj
- Center for Biomedical Engineering and Science, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC 28223, United States
| | - Arjun Prasad Tiwari
- Center for Biomedical Engineering and Science, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC 28223, United States
| | - Prashant Adhikari
- Center for Biomedical Engineering and Science, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC 28223, United States
| | - In Hong Yang
- Center for Biomedical Engineering and Science, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC 28223, United States.
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5
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Park SB, Cetinkaya-Fisgin A, Argyriou AA, Höke A, Cavaletti G, Alberti P. Axonal degeneration in chemotherapy-induced peripheral neurotoxicity: clinical and experimental evidence. J Neurol Neurosurg Psychiatry 2023; 94:962-972. [PMID: 37015772 PMCID: PMC10579520 DOI: 10.1136/jnnp-2021-328323] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 02/15/2023] [Indexed: 04/06/2023]
Abstract
Multiple pathological mechanisms are involved in the development of chemotherapy-induced peripheral neurotoxicity (CIPN). Recent work has provided insights into the molecular mechanisms underlying chemotherapy-induced axonal degeneration. This review integrates evidence from preclinical and clinical work on the onset, progression and outcome of axonal degeneration in CIPN. We review likely triggers of axonal degeneration in CIPN and highlight evidence of molecular pathways involved in axonal degeneration and their relevance to CIPN, including SARM1-mediated axon degeneration pathway. We identify potential clinical markers of axonal dysfunction to provide early identification of toxicity as well as present potential treatment strategies to intervene in axonal degeneration pathways. A greater understanding of axonal degeneration processes in CIPN will provide important information regarding the development and progression of axonal dysfunction more broadly and will hopefully assist in the development of successful interventions for CIPN and other neurodegenerative disorders.
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Affiliation(s)
- Susanna B Park
- Brain and Mind Centre, Faculty of Medicine and Health, School of Medical Sciences, University of Sydney, Camperdown, New South Wales, Australia
| | - Aysel Cetinkaya-Fisgin
- Department of Neurology, Neuromuscular Division, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Andreas A Argyriou
- Department of Neurology, "Agios Andreas" State General Hospital of Patras, Patras, Greece
| | - Ahmet Höke
- Department of Neurology, Neuromuscular Division, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Guido Cavaletti
- Experimental Neurology Unit and Milan Center for Neuroscience, University of Milano-Bicocca, Monza, Italy
| | - Paola Alberti
- Experimental Neurology Unit and Milan Center for Neuroscience, University of Milano-Bicocca, Monza, Italy
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6
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Milton LA, Viglione MS, Ong LJY, Nordin GP, Toh YC. Vat photopolymerization 3D printed microfluidic devices for organ-on-a-chip applications. LAB ON A CHIP 2023; 23:3537-3560. [PMID: 37476860 PMCID: PMC10448871 DOI: 10.1039/d3lc00094j] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
Organs-on-a-chip, or OoCs, are microfluidic tissue culture devices with micro-scaled architectures that repeatedly achieve biomimicry of biological phenomena. They are well positioned to become the primary pre-clinical testing modality as they possess high translational value. Current methods of fabrication have facilitated the development of many custom OoCs that have generated promising results. However, the reliance on microfabrication and soft lithographic fabrication techniques has limited their prototyping turnover rate and scalability. Additive manufacturing, known commonly as 3D printing, shows promise to expedite this prototyping process, while also making fabrication easier and more reproducible. We briefly introduce common 3D printing modalities before identifying two sub-types of vat photopolymerization - stereolithography (SLA) and digital light processing (DLP) - as the most advantageous fabrication methods for the future of OoC development. We then outline the motivations for shifting to 3D printing, the requirements for 3D printed OoCs to be competitive with the current state of the art, and several considerations for achieving successful 3D printed OoC devices touching on design and fabrication techniques, including a survey of commercial and custom 3D printers and resins. In all, we aim to form a guide for the end-user to facilitate the in-house generation of 3D printed OoCs, along with the future translation of these important devices.
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Affiliation(s)
- Laura A Milton
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Australia.
- Centre for Biomedical Technologies, Queensland University of Technology, Brisbane, Australia
| | - Matthew S Viglione
- Department of Electrical and Computer Engineering, Brigham Young University, Provo, Utah, USA.
| | - Louis Jun Ye Ong
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Australia.
- Centre for Biomedical Technologies, Queensland University of Technology, Brisbane, Australia
- Max Planck Queensland Centre (MPQC) for the Materials Science of Extracellular Matrices, Queensland University of Technology, Brisbane, Australia
| | - Gregory P Nordin
- Department of Electrical and Computer Engineering, Brigham Young University, Provo, Utah, USA.
| | - Yi-Chin Toh
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Australia.
- Centre for Biomedical Technologies, Queensland University of Technology, Brisbane, Australia
- Max Planck Queensland Centre (MPQC) for the Materials Science of Extracellular Matrices, Queensland University of Technology, Brisbane, Australia
- Centre for Microbiome Research, Queensland University of Technology, Brisbane, Australia
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7
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Lee D, Yang K, Xie J. Advances in Nerve Injury Models on a Chip. Adv Biol (Weinh) 2023; 7:e2200227. [PMID: 36709421 DOI: 10.1002/adbi.202200227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 12/19/2022] [Indexed: 01/30/2023]
Abstract
Regeneration and functional recovery of the damaged nerve are challenging due to the need for effective therapeutic drugs, biomaterials, and approaches. The poor outcome of the treatment of nerve injury stems from the incomplete understanding of axonal biology and interactions between neurons and the surrounding environment, such as glial cells and extracellular matrix. Microfluidic devices, in combination with various injury techniques, have been applied to test biological hypotheses in nerve injury and nerve regeneration. The microfluidic devices provide multiple advantages over the in vitro cell culture on a petri dish and in vivo animal models because a specific part of the neuronal environment can be manipulated using physical and chemical interventions. In addition, single-cell behavior and interactions between neurons and glial cells can be visualized and quantified on microfluidic platforms. In this article, current in vitro nerve injury models on a chip that mimics in vivo axonal injuries and the regeneration process of axons are summarized. The microfluidic-based nerve injury models could enhance the understanding of the physiological and pathophysiological mechanisms of nerve tissues and simultaneously serve as powerful drug and biomaterial screening platforms.
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Affiliation(s)
- Donghee Lee
- Department of Surgery-Transplant and Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Kai Yang
- Department of Surgery-Plastic Surgery, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, 68198, USA
- Department of Mechanical and Materials Engineering, College of Engineering, University of Nebraska Lincoln, Lincoln, NE, 68588, USA
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8
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Elfarnawany A, Dehghani F. Time- and Concentration-Dependent Adverse Effects of Paclitaxel on Non-Neuronal Cells in Rat Primary Dorsal Root Ganglia. TOXICS 2023; 11:581. [PMID: 37505547 PMCID: PMC10385404 DOI: 10.3390/toxics11070581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/27/2023] [Accepted: 07/01/2023] [Indexed: 07/29/2023]
Abstract
Paclitaxel is a chemotherapeutic agent used to treat a wide range of malignant tumors. Although it has anti-tumoral properties, paclitaxel also shows significant adverse effects on the peripheral nervous system, causing peripheral neuropathy. Paclitaxel has previously been shown to exert direct neurotoxic effects on primary DRG neurons. However, little is known about paclitaxel's effects on non-neuronal DRG cells. They provide mechanical and metabolic support and influence neuronal signaling. In the present study, paclitaxel effects on primary DRG non-neuronal cells were analyzed and their concentration or/and time dependence investigated. DRGs of Wister rats (6-8 weeks old) were isolated, and non-neuronal cell populations were separated by the density gradient centrifugation method. Different concentrations of Paclitaxel (0.01 µM-10 µM) were tested on cell viability by MTT assay, cell death by lactate dehydrogenase (LDH) assay, and propidium iodide (PI) assay, as well as cell proliferation by Bromodeoxyuridine (BrdU) assay at 24 h, 48 h, and 72 h post-treatment. Furthermore, phenotypic effects have been investigated by using immunofluorescence techniques. Paclitaxel exhibited several toxicological effects on non-neuronal cells, including a reduction in cell viability, an increase in cell death, and an inhibition of cell proliferation. These effects were concentration- and time-dependent. Cellular and nuclear changes such as shrinkage, swelling of cell bodies, nuclear condensation, chromatin fragmentation, retraction, and a loss in processes were observed. Paclitaxel showed adverse effects on primary DRG non-neuronal cells, which might have adverse functional consequences on sensory neurons of the DRG, asking for consideration in the management of peripheral neuropathy.
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Affiliation(s)
- Amira Elfarnawany
- Department of Anatomy and Cell Biology, Medical Faculty, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany
- Zoology Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Faramarz Dehghani
- Department of Anatomy and Cell Biology, Medical Faculty, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany
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9
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Tiwari AP, Tristan LJC, Albin B, Yang IH. Fluocinolone Acetonide Enhances Anterograde Mitochondria Trafficking and Promotes Neuroprotection against Paclitaxel-Induced Peripheral Neuropathy. ACS Chem Neurosci 2023. [PMID: 37167105 DOI: 10.1021/acschemneuro.3c00218] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023] Open
Abstract
Paclitaxel (PTX)-induced peripheral neuropathy (PIPN) is a debilitating health condition which is a result of degeneration of peripheral nerves found in extremities. Currently, there are no established treatment methods that can prevent or protect from PIPN. Fluocinolone acetonide (FA) has been recently identified as a potential candidate for protection from PIPN. However, the fundamental mechanism of action is still unknown. In this study, we showed that enhanced anterograde mitochondrial movement in dorsal root ganglion (DRG) cells has a major role in FA-mediated neuroprotection in PIPN. In this study, cells were treated with PTX or FA along with their combination followed by mitochondrial fluorescence staining. Somal (proximal) and axonal (distal) mitochondria were selectively stained using a microfluidic compartmentalized chamber with different MitoTrackers blue and red, respectively, which we termed, the two-color staining approach. Results revealed that axons were protected from degeneration by the PTX effect when treated along with FA. PTX exposure alone resulted in low mitochondrial mobility in DRG cells. However, cotreatment with PTX and FA showed significant enhancement of anterograde trafficking of somal (proximal) mitochondria to distal axons. Similarly, cotreatment with FA restored mitochondrial mobility significantly. Overall, this study affirms that increasing mitochondrial recruitment into the axon by cotreatment with FA can be a worthwhile strategy to protect or prevent PIPN. The proposed two-color staining approach can be extended to study trafficking for other neuron-specific subcellular organelles.
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Affiliation(s)
- Arjun Prasad Tiwari
- Center for Biomedical Engineering and Science, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Lee Ji Chao Tristan
- Department of Biomedical Engineering, National University of Singapore, Singapore 119077, Singapore
- School of Medicine, University of Western Australia, Perth, Western Australia 6009, Australia
| | - Bayne Albin
- Center for Biomedical Engineering and Science, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - In Hong Yang
- Center for Biomedical Engineering and Science, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
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10
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Li Z, Jiang Z, Lu L, Liu Y. Microfluidic Manipulation for Biomedical Applications in the Central and Peripheral Nervous Systems. Pharmaceutics 2023; 15:pharmaceutics15010210. [PMID: 36678839 PMCID: PMC9862045 DOI: 10.3390/pharmaceutics15010210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/04/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Physical injuries and neurodegenerative diseases often lead to irreversible damage to the organizational structure of the central nervous system (CNS) and peripheral nervous system (PNS), culminating in physiological malfunctions. Investigating these complex and diverse biological processes at the macro and micro levels will help to identify the cellular and molecular mechanisms associated with nerve degeneration and regeneration, thereby providing new options for the development of new therapeutic strategies for the functional recovery of the nervous system. Due to their distinct advantages, modern microfluidic platforms have significant potential for high-throughput cell and organoid cultures in vitro, the synthesis of a variety of tissue engineering scaffolds and drug carriers, and observing the delivery of drugs at the desired speed to the desired location in real time. In this review, we first introduce the types of nerve damage and the repair mechanisms of the CNS and PNS; then, we summarize the development of microfluidic platforms and their application in drug carriers. We also describe a variety of damage models, tissue engineering scaffolds, and drug carriers for nerve injury repair based on the application of microfluidic platforms. Finally, we discuss remaining challenges and future perspectives with regard to the promotion of nerve injury repair based on engineered microfluidic platform technology.
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11
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Towards a mechanistic understanding of axon transport and endocytic changes underlying paclitaxel-induced peripheral neuropathy. Exp Neurol 2023; 359:114258. [PMID: 36279934 DOI: 10.1016/j.expneurol.2022.114258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 10/11/2022] [Accepted: 10/17/2022] [Indexed: 11/11/2022]
Abstract
Paclitaxel is a common chemotherapeutic agent widely used to treat solid cancer. However, it frequently causes peripheral sensory neuropathy, resulting in sensory abnormalities and pain in patients receiving treatment for cancer. As one of the most widely used chemotherapeutics, many preclinical studies on paclitaxel-induced peripheral neuropathy (PIPN) have been performed. Yet, there remain no effective options for treatment or prevention. Due to paclitaxel's ability to bind to and stabilize microtubules, a change in microtubule dynamics and subsequent disruptions in axonal transport has been predicted as a major underlying cause of paclitaxel-induced toxicity. However, the systemic understanding of PIPN mechanisms is largely incomplete, and various phenotypes have not been directly attributed to microtubule-related effects. This review aims to provide an overview of the literature involving paclitaxel-induced alteration in microtubule dynamics, axonal transport, and endocytic changes. It also aims to provide insights into how the microtubule-mediated hypothesis may relate to various phenotypes reported in PIPN studies.
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12
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Palmitoylethanolamide Mitigates Paclitaxel Toxicity in Primary Dorsal Root Ganglion Neurons. Biomolecules 2022; 12:biom12121873. [PMID: 36551301 PMCID: PMC9775584 DOI: 10.3390/biom12121873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/06/2022] [Accepted: 12/10/2022] [Indexed: 12/15/2022] Open
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a common side effect of several chemotherapeutic agents, such as Paclitaxel. The main symptoms of CIPN are pain and numbness in the hands and feet. Paclitaxel is believed to accumulate in the dorsal root ganglia and free nerve endings. Novel therapeutic agents might help to mitigate or prevent Paclitaxel toxicity on dorsal root ganglion (DRG) neurons. Thus, we used primary DRG neurons as a model to investigate the potential neuroprotective effects of the endocannabinoid-like substance, palmitoylethanolamide (PEA). DRG neurons were isolated from cervical to sacral segments of spinal nerves of Wister rats (6-8 weeks old). After isolation and purification of neuronal cell populations, different concentrations of Paclitaxel (0.01-10 µM) or PEA (0.1-10 µM) or their combination were tested on cell viability by MTT assay at 24 h, 48, and 72 h post-treatment. Furthermore, morphometric analyses of neurite length and soma size for DRG neurons were performed. Adverse Paclitaxel effects on cell viability were apparent at 72 h post-treatment whereas Paclitaxel significantly reduced the neurite length in a concentration-dependent manner nearly at all investigated time points. However, Paclitaxel significantly increased the size of neuronal cell bodies at all time windows. These phenotypic effects were significantly reduced in neurons additionally treated with PEA, indicating the neuroprotective effect of PEA. PEA alone led to a significant increase in neuron viability regardless of PEA concentrations, apparent improvements in neurite outgrowth as well as a significant decrease in soma size of neurons at different investigated time points. Taken together, PEA showed promising protective effects against Paclitaxel-related toxicity on DRG neurons.
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13
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Ezaka M, Marutani E, Miyazaki Y, Kanemaru E, Selig MK, Boerboom SL, Ostrom KF, Stemmer-Rachamimov A, Bloch DB, Brenner GJ, Ohshima E, Ichinose F. Oral Administration of Glutathione Trisulfide Increases Reactive Sulfur Levels in Dorsal Root Ganglion and Ameliorates Paclitaxel-Induced Peripheral Neuropathy in Mice. Antioxidants (Basel) 2022; 11:2122. [PMID: 36358494 PMCID: PMC9686764 DOI: 10.3390/antiox11112122] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/18/2022] [Accepted: 10/24/2022] [Indexed: 09/29/2023] Open
Abstract
Peripheral neuropathy is a dose-limiting side effect of chemotherapy with paclitaxel. Paclitaxel-induced peripheral neuropathy (PIPN) is typically characterized by a predominantly sensory neuropathy presenting with allodynia, hyperalgesia and spontaneous pain. Oxidative mitochondrial damage in peripheral sensory neurons is implicated in the pathogenesis of PIPN. Reactive sulfur species, including persulfides (RSSH) and polysulfides (RSnH), are strong nucleophilic and electrophilic compounds that exert antioxidant effects and protect mitochondria. Here, we examined the potential neuroprotective effects of glutathione trisulfide (GSSSG) in a mouse model of PIPN. Intraperitoneal administration of paclitaxel at 4 mg/kg/day for 4 days induced mechanical allodynia and thermal hyperalgesia in mice. Oral administration of GSSSG at 50 mg/kg/day for 28 days ameliorated mechanical allodynia, but not thermal hyperalgesia. Two hours after oral administration, 34S-labeled GSSSG was detected in lumber dorsal root ganglia (DRG) and in the lumber spinal cord. In mice treated with paclitaxel, GSSSG upregulated expression of genes encoding antioxidant proteins in lumber DRG, prevented loss of unmyelinated axons and inhibited degeneration of mitochondria in the sciatic nerve. In cultured primary neurons from cortex and DRG, GSSSG mitigated paclitaxel-induced superoxide production, loss of axonal mitochondria, and axonal degeneration. These results indicate that oral administration of GSSSG mitigates PIPN by preventing axonal degeneration and mitochondria damage in peripheral sensory nerves. The findings suggest that administration of GSSSG may be an approach to the treatment or prevention of PIPN and other peripheral neuropathies.
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Affiliation(s)
- Mariko Ezaka
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Eizo Marutani
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Yusuke Miyazaki
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Eiki Kanemaru
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Martin K. Selig
- Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Sophie L. Boerboom
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Katrina F. Ostrom
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | | | - Donald B. Bloch
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Medicine, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Gary J. Brenner
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Etsuo Ohshima
- Corporate Strategy Department, Kyowa Hakko Bio Co., Ltd., Tokyo 164-0001, Japan
| | - Fumito Ichinose
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
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14
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Tay N, Laakso EL, Schweitzer D, Endersby R, Vetter I, Starobova H. Chemotherapy-induced peripheral neuropathy in children and adolescent cancer patients. Front Mol Biosci 2022; 9:1015746. [PMID: 36310587 PMCID: PMC9614173 DOI: 10.3389/fmolb.2022.1015746] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 09/20/2022] [Indexed: 11/22/2022] Open
Abstract
Brain cancer and leukemia are the most common cancers diagnosed in the pediatric population and are often treated with lifesaving chemotherapy. However, chemotherapy causes severe adverse effects and chemotherapy-induced peripheral neuropathy (CIPN) is a major dose-limiting and debilitating side effect. CIPN can greatly impair quality of life and increases morbidity of pediatric patients with cancer, with the accompanying symptoms frequently remaining underdiagnosed. Little is known about the incidence of CIPN, its impact on the pediatric population, and the underlying pathophysiological mechanisms, as most existing information stems from studies in animal models or adult cancer patients. Herein, we aim to provide an understanding of CIPN in the pediatric population and focus on the 6 main substance groups that frequently cause CIPN, namely the vinca alkaloids (vincristine), platinum-based antineoplastics (cisplatin, carboplatin and oxaliplatin), taxanes (paclitaxel and docetaxel), epothilones (ixabepilone), proteasome inhibitors (bortezomib) and immunomodulatory drugs (thalidomide). We discuss the clinical manifestations, assessments and diagnostic tools, as well as risk factors, pathophysiological processes and current pharmacological and non-pharmacological approaches for the prevention and treatment of CIPN.
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Affiliation(s)
- Nicolette Tay
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD, Australia
| | - E-Liisa Laakso
- Mater Research Institute-The University of Queensland, South Brisbane, QLD, Australia
| | - Daniel Schweitzer
- Mater Research Institute-The University of Queensland, South Brisbane, QLD, Australia
| | - Raelene Endersby
- Telethon Kids Institute, University of Western Australia, Nedlands, WA, Australia
| | - Irina Vetter
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD, Australia
- The School of Pharmacy, The University of Queensland, Woolloongabba, QLD, Australia
| | - Hana Starobova
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD, Australia
- *Correspondence: Hana Starobova,
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15
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Shin GJE, Abaci HE, Smith MC. Cellular Pathogenesis of Chemotherapy-Induced Peripheral Neuropathy: Insights From Drosophila and Human-Engineered Skin Models. FRONTIERS IN PAIN RESEARCH 2022; 3:912977. [PMID: 35875478 PMCID: PMC9304629 DOI: 10.3389/fpain.2022.912977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 06/08/2022] [Indexed: 11/13/2022] Open
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a highly prevalent and complex condition arising from chemotherapy cancer treatments. Currently, there are no treatment or prevention options in the clinic. CIPN accompanies pain-related sensory functions starting from the hands and feet. Studies focusing on neurons in vitro and in vivo models significantly advanced our understanding of CIPN pathological mechanisms. However, given the direct toxicity shown in both neurons and non-neuronal cells, effective in vivo or in vitro models that allow the investigation of neurons in their local environment are required. No single model can provide a complete solution for the required investigation, therefore, utilizing a multi-model approach would allow complementary advantages of different models and robustly validate findings before further translation. This review aims first to summarize approaches and insights from CIPN in vivo models utilizing small model organisms. We will focus on Drosophila melanogaster CIPN models that are genetically amenable and accessible to study neuronal interactions with the local environment in vivo. Second, we will discuss how these findings could be tested in physiologically relevant vertebrate models. We will focus on in vitro approaches using human cells and summarize the current understanding of engineering approaches that may allow the investigation of pathological changes in neurons and the skin environment.
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Affiliation(s)
- Grace Ji-eun Shin
- Zuckerman Mind Brain and Behavior Institute, Jerome L. Greene Science Center, Columbia University, New York, NY, United States
- *Correspondence: Grace Ji-eun Shin
| | - Hasan Erbil Abaci
- Department of Dermatology, Columbia University Medical Center, Saint Nicholas Avenue, New York, NY, United States
| | - Madison Christine Smith
- Zuckerman Mind Brain and Behavior Institute, Jerome L. Greene Science Center, Columbia University, New York, NY, United States
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16
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Kim Y, Jung YH, Park SB, Kim H, Kwon JY, Kim HK, Lee HJ, Jeon S, Kim E. TMI-1, TNF-α-Converting Enzyme Inhibitor, Protects Against Paclitaxel-Induced Neurotoxicity in the DRG Neuronal Cells In Vitro. Front Pharmacol 2022; 13:842779. [PMID: 35250589 PMCID: PMC8889072 DOI: 10.3389/fphar.2022.842779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 01/28/2022] [Indexed: 12/19/2022] Open
Abstract
Background: Chemotherapy-induced peripheral neuropathy (CIPN) negatively impacts cancer survivors’ quality of life and is challenging to treat with existing drugs for neuropathic pain. TNF-α is known to potentiate TRPV1 activity, which contributes to CIPN. Here, we assessed the role of TMI-1, a TNF-α-converting enzyme inhibitor, in paclitaxel (PAC)-induced neurotoxicity in dorsal root ganglion (DRG) cells. Materials and Methods: Immortalized DRG neuronal 50B11 cells were cultured and treated with PAC or PAC with TMI-1 following neuronal differentiation. Cell viability, analysis of neurite growth, immunofluorescence, calcium flow cytometry, western blotting, quantitative RT-PCR, and cytokine quantitation by ELISA were performed to determine the role of TMI-1 in neurotoxicity in neuronal cells. Results: PAC administration decreased the length of neurites and upregulated the expression of TRPV1 in 50B11 cells. TMI-1 administration showed a protective effect by suppressing inflammatory signaling, and secretion of TNF-α. Conclusion: TMI-1 partially protects against paclitaxel-induced neurotoxicity by reversing the upregulation of TRPV1 and decreasing levels of inflammatory cytokines, including TNF-α, IL-1β, and IL-6 in neuronal cells.
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Affiliation(s)
- Yesul Kim
- Department of Anesthesia and Pain Medicine, School of Medicine, Pusan National University, Busan, South Korea
| | - Young-Hoon Jung
- Department of Anesthesia and Pain Medicine, School of Medicine, Pusan National University, Busan, South Korea
| | - Seung-Bin Park
- Department of Anesthesia and Pain Medicine, Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Heekee Kim
- Department of Pain Medicine, The University of Texas MD Anderson Cancer Center, Houston, United States
| | - Jae-Young Kwon
- Department of Anesthesia and Pain Medicine, School of Medicine, Pusan National University, Busan, South Korea
| | - Hae-Kyu Kim
- Department of Anesthesia and Pain Medicine, School of Medicine, Pusan National University, Busan, South Korea
| | - Hyeon-Jeong Lee
- Department of Anesthesia and Pain Medicine, School of Medicine, Pusan National University, Busan, South Korea
| | - Soeun Jeon
- Department of Anesthesia and Pain Medicine, School of Medicine, Pusan National University, Busan, South Korea
| | - Eunsoo Kim
- Department of Anesthesia and Pain Medicine, School of Medicine, Pusan National University, Busan, South Korea.,Department of Anesthesia and Pain Medicine, Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
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17
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Li Y, Pazyra-Murphy MF, Avizonis D, de Sá Tavares Russo M, Tang S, Chen CY, Hsueh YP, Bergholz JS, Jiang T, Zhao JJ, Zhu J, Ko KW, Milbrandt J, DiAntonio A, Segal RA. Sarm1 activation produces cADPR to increase intra-axonal Ca++ and promote axon degeneration in PIPN. J Cell Biol 2022; 221:e202106080. [PMID: 34935867 PMCID: PMC8704956 DOI: 10.1083/jcb.202106080] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/17/2021] [Accepted: 12/07/2021] [Indexed: 12/23/2022] Open
Abstract
Cancer patients frequently develop chemotherapy-induced peripheral neuropathy (CIPN), a painful and long-lasting disorder with profound somatosensory deficits. There are no effective therapies to prevent or treat this disorder. Pathologically, CIPN is characterized by a "dying-back" axonopathy that begins at intra-epidermal nerve terminals of sensory neurons and progresses in a retrograde fashion. Calcium dysregulation constitutes a critical event in CIPN, but it is not known how chemotherapies such as paclitaxel alter intra-axonal calcium and cause degeneration. Here, we demonstrate that paclitaxel triggers Sarm1-dependent cADPR production in distal axons, promoting intra-axonal calcium flux from both intracellular and extracellular calcium stores. Genetic or pharmacologic antagonists of cADPR signaling prevent paclitaxel-induced axon degeneration and allodynia symptoms, without mitigating the anti-neoplastic efficacy of paclitaxel. Our data demonstrate that cADPR is a calcium-modulating factor that promotes paclitaxel-induced axon degeneration and suggest that targeting cADPR signaling provides a potential therapeutic approach for treating paclitaxel-induced peripheral neuropathy (PIPN).
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Affiliation(s)
- Yihang Li
- Department of Neurobiology, Harvard Medical School, Boston, MA
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
| | - Maria F. Pazyra-Murphy
- Department of Neurobiology, Harvard Medical School, Boston, MA
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
| | - Daina Avizonis
- Metabolomics Innovation Resource, Goodman Cancer Research Centre, McGill University, Montréal, Quebec, Canada
| | - Mariana de Sá Tavares Russo
- Metabolomics Innovation Resource, Goodman Cancer Research Centre, McGill University, Montréal, Quebec, Canada
| | - Sophia Tang
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
| | - Chiung-Ya Chen
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan, Republic of China
| | - Yi-Ping Hsueh
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan, Republic of China
| | - Johann S. Bergholz
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA
- Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA
| | - Tao Jiang
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
| | - Jean J. Zhao
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA
- Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA
| | - Jian Zhu
- Department of Genetics, Washington University School of Medicine, St. Louis, MO
| | - Kwang Woo Ko
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO
| | - Jeffrey Milbrandt
- Department of Genetics, Washington University School of Medicine, St. Louis, MO
- Needleman Center for Neurometabolism and Axonal Therapeutics, Washington University School of Medicine, St. Louis, MO
| | - Aaron DiAntonio
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO
- Needleman Center for Neurometabolism and Axonal Therapeutics, Washington University School of Medicine, St. Louis, MO
| | - Rosalind A. Segal
- Department of Neurobiology, Harvard Medical School, Boston, MA
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
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18
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Varier P, Raju G, Madhusudanan P, Jerard C, Shankarappa SA. A Brief Review of In Vitro Models for Injury and Regeneration in the Peripheral Nervous System. Int J Mol Sci 2022; 23:816. [PMID: 35055003 PMCID: PMC8775373 DOI: 10.3390/ijms23020816] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/03/2021] [Accepted: 12/05/2021] [Indexed: 02/06/2023] Open
Abstract
Nerve axonal injury and associated cellular mechanisms leading to peripheral nerve damage are important topics of research necessary for reducing disability and enhancing quality of life. Model systems that mimic the biological changes that occur during human nerve injury are crucial for the identification of cellular responses, screening of novel therapeutic molecules, and design of neural regeneration strategies. In addition to in vivo and mathematical models, in vitro axonal injury models provide a simple, robust, and reductionist platform to partially understand nerve injury pathogenesis and regeneration. In recent years, there have been several advances related to in vitro techniques that focus on the utilization of custom-fabricated cell culture chambers, microfluidic chamber systems, and injury techniques such as laser ablation and axonal stretching. These developments seem to reflect a gradual and natural progression towards understanding molecular and signaling events at an individual axon and neuronal-soma level. In this review, we attempt to categorize and discuss various in vitro models of injury relevant to the peripheral nervous system and highlight their strengths, weaknesses, and opportunities. Such models will help to recreate the post-injury microenvironment and aid in the development of therapeutic strategies that can accelerate nerve repair.
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Affiliation(s)
| | | | | | | | - Sahadev A. Shankarappa
- Centre for Nanosciences & Molecular Medicine, Amrita Institute of Medical Sciences and Research Center, Amrita Vishwa Vidyapeetham, Kochi 682041, India; (P.V.); (G.R.); (P.M.); (C.J.)
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19
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Wu J, Zhu ZY, Fan ZW, Chen Y, Yang RY, Li Y. Downregulation of EphB2 by RNA interference attenuates glial/fibrotic scar formation and promotes axon growth. Neural Regen Res 2022; 17:362-369. [PMID: 34269211 PMCID: PMC8463997 DOI: 10.4103/1673-5374.317988] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The rapid formation of a glial/fibrotic scar is one of the main factors hampering axon growth after spinal cord injury. The bidirectional EphB2/ephrin-B2 signaling of the fibroblast-astrocyte contact-dependent interaction is a trigger for glial/fibrotic scar formation. In the present study, a new in vitro model was produced by coculture of fibroblasts and astrocytes wounded by scratching to mimic glial/fibrotic scar-like structures using an improved slide system. After treatment with RNAi to downregulate EphB2, changes in glial/fibrotic scar formation and the growth of VSC4.1 motoneuron axons were examined. Following RNAi treatment, fibroblasts and astrocytes dispersed without forming a glial/fibrotic scar-like structure. Furthermore, the expression levels of neurocan, NG2 and collagen I in the coculture were reduced, and the growth of VSC4.1 motoneuron axons was enhanced. These findings suggest that suppression of EphB2 expression by RNAi attenuates the formation of a glial/fibrotic scar and promotes axon growth. This study was approved by the Laboratory Animal Ethics Committee of Jiangsu Province, China (approval No. 2019-0506-002) on May 6, 2019.
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Affiliation(s)
- Jian Wu
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, Jiangsu Province, China
| | - Zhen-Yu Zhu
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, Jiangsu Province, China
| | - Zhi-Wei Fan
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, Jiangsu Province, China
| | - Ying Chen
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, Jiangsu Province, China
| | - Ri-Yun Yang
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, Jiangsu Province, China
| | - Yi Li
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, Jiangsu Province, China
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20
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Luo B, Tiwari AP, Chen N, Ramakrishna S, Yang IH. Development of an Axon-Guiding Aligned Nanofiber-Integrated Compartmentalized Microfluidic Neuron Culture System. ACS APPLIED BIO MATERIALS 2021; 4:8424-8432. [PMID: 35005947 DOI: 10.1021/acsabm.1c00960] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Microfluidic-based neuron cell culture systems have recently gained a lot of attention due to their efficiency in supporting the spatial and temporal control of cellular microenvironments. However, the lack of axon guidance is the key limitation in current culture systems. To combat this, we have developed electrospun aligned nanofiber-integrated compartmentalized microfluidic neuron culture systems (NIMSs), where the nanofibers have enabled axonal guidance and stability. The resulting platform significantly improved axon alignment, length, and stability for both rat primary embryonic motor neurons (MNs) and dorsal root ganglia (DRG) neurons compared to the conventional glass-based microfluidic systems (GMSs). The results showed that axonal growth covered more than two times the area on the axonal chamber of NIMSs compared to the area covered for GMSs. Overall, this platform can be used as a valuable tool for fundamental neuroscience research, drug screening, and biomaterial testing.
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Affiliation(s)
- Baiwen Luo
- N.1 Institute for Health, National University of Singapore, 28 Medical Drive, #05-COR, 117456 Singapore
| | - Arjun Prasad Tiwari
- Department of Mechanical Engineering and Engineering Science, Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Nuan Chen
- N.1 Institute for Health, National University of Singapore, 28 Medical Drive, #05-COR, 117456 Singapore.,Center of Nanofibers & Nanotechnology, Department of Mechanical Engineering, National University of Singapore, 117575 Singapore
| | - Seeram Ramakrishna
- Center of Nanofibers & Nanotechnology, Department of Mechanical Engineering, National University of Singapore, 117575 Singapore
| | - In Hong Yang
- Department of Mechanical Engineering and Engineering Science, Center for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
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21
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YAYLA M, ÜN H, BİNNETOĞLU D. Neuroprotective effects of phloretin and phloridzin on paclitaxel-induced neuronal damage in primary neuron cells. CUKUROVA MEDICAL JOURNAL 2021. [DOI: 10.17826/cumj.871862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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22
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Abstract
Engineered human mini-brains, made possible by knowledge from the convergence of precision microengineering and cell biology, permit systematic studies of complex neurological processes and of pathogenesis beyond what can be done with animal models. By culturing human brain cells with physiological microenvironmental cues, human mini-brain models reconstitute the arrangement of structural tissues and some of the complex biological functions of the human brain. In this Review, we highlight the most significant developments that have led to microphysiological human mini-brain models. We introduce the history of mini-brain development, review methods for creating mini-brain models in static conditions, and discuss relevant state-of-the-art dynamic cell-culture systems. We also review human mini-brain models that reconstruct aspects of major neurological disorders under static or dynamic conditions. Engineered human mini-brains will contribute to advancing the study of the physiology and aetiology of neurological disorders, and to the development of personalized medicines for them.
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Gómez-Gálvez Y, Gates MA. Paclitaxel is effective for controlling astrocyte proliferation in vitro: Implications for generating ventral mesencephalic cultures enriched with dopamine neurons. J Neurosci Methods 2020; 351:109065. [PMID: 33387573 DOI: 10.1016/j.jneumeth.2020.109065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/23/2020] [Accepted: 12/27/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND Primary embryonic ventral mesencephalic (VM) cultures are a high throughput tool for understanding and manipulating dopamine neurons, to study the mechanisms that trigger their degeneration during Parkinson's disease (PD), and to test new drugs aimed at treating the disease. Unfortunately, primary cell cultures are often quickly overwhelmed by dividing astrocytes which both obscure neuronal cells and distort the cellular composition that exists in vivo. NEW METHOD To develop a new in vitro system whereby astrocyte division can be readily controlled while maintaining neuronal integrity, VM cultures were treated with different doses (1.75, 3.5, 7, 14 nM) of the anti-mitotic drug paclitaxel for up to seven days in vitro. The study subsequently sought to determine the importance of astrocytes in dopamine neuron survival when challenged with an exposure to the toxin 6-hydroxydopamine (6-OHDA). RESULTS Optical density (O.D.) measures of GFAP expression and counts of β-III tubulin and tyrosine hydroxylase positive neurons reveals that a low dose of 3.5 nM of paclitaxel significantly reduced the density of GFAP + astrocytes in primary VM cultures, while maintaining the viability of neurons and dopamine neurons. Interestingly, a reduction of GFAP + astrocytes within primary VM cultures did not reveal any statistically significant differences in the number of dopamine neurons surviving treatment with 6-OHDA. CONCLUSIONS These findings detail a quick and simple method for stabilising astrocyte numbers in primary VM cultures, without affecting the viability of dopamine neurons, and suggest that astrocytes may not enhance the survival of dopamine neurons when challenged with the 6-OHDA toxin.
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Affiliation(s)
- Yolanda Gómez-Gálvez
- School of Pharmacy and Bioengineering, Keele University, Staffordshire, UK; School of Life Sciences, Keele University, Staffordshire, UK; School of Medicine, Keele University, Staffordshire, UK
| | - Monte A Gates
- School of Pharmacy and Bioengineering, Keele University, Staffordshire, UK; School of Medicine, Keele University, Staffordshire, UK.
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24
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Yeh TY, Luo IW, Hsieh YL, Tseng TJ, Chiang H, Hsieh ST. Peripheral Neuropathic Pain: From Experimental Models to Potential Therapeutic Targets in Dorsal Root Ganglion Neurons. Cells 2020; 9:cells9122725. [PMID: 33371371 PMCID: PMC7767346 DOI: 10.3390/cells9122725] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 12/16/2020] [Indexed: 12/12/2022] Open
Abstract
Neuropathic pain exerts a global burden caused by the lesions in the somatosensory nerve system, including the central and peripheral nervous systems. The mechanisms of nerve injury-induced neuropathic pain involve multiple mechanisms, various signaling pathways, and molecules. Currently, poor efficacy is the major limitation of medications for treating neuropathic pain. Thus, understanding the detailed molecular mechanisms should shed light on the development of new therapeutic strategies for neuropathic pain. Several well-established in vivo pain models were used to investigate the detail mechanisms of peripheral neuropathic pain. Molecular mediators of pain are regulated differentially in various forms of neuropathic pain models; these regulators include purinergic receptors, transient receptor potential receptor channels, and voltage-gated sodium and calcium channels. Meanwhile, post-translational modification and transcriptional regulation are also altered in these pain models and have been reported to mediate several pain related molecules. In this review, we focus on molecular mechanisms and mediators of neuropathic pain with their corresponding transcriptional regulation and post-translational modification underlying peripheral sensitization in the dorsal root ganglia. Taken together, these molecular mediators and their modification and regulations provide excellent targets for neuropathic pain treatment.
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Affiliation(s)
- Ti-Yen Yeh
- Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei 10051, Taiwan;
| | - I-Wei Luo
- Department of Life Science, College of Life Science, National Taiwan University, Taipei 10617, Taiwan;
| | - Yu-Lin Hsieh
- Department of Anatomy, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
- School of Post-Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hostpital, Kaohsiung 80708, Taiwan
| | - To-Jung Tseng
- Department of Anatomy, School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan;
- Department of Medical Education, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
| | | | - Sung-Tsang Hsieh
- Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei 10051, Taiwan;
- Department of Neurology, National Taiwan University Hospital, Taipei 10002, Taiwan
- Graduate Institute of Brian and Mind Sciences, College of Medicine, National Taiwan University, Taipei 10051, Taiwan
- Center of Precision Medicine, College of Medicine, National Taiwan University, Taipei 10055, Taiwan
- Correspondence: ; Tel.: +886-2-23123456 (ext. 88182); Fax: +886-223915292
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25
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Staff NP, Fehrenbacher JC, Caillaud M, Damaj MI, Segal RA, Rieger S. Pathogenesis of paclitaxel-induced peripheral neuropathy: A current review of in vitro and in vivo findings using rodent and human model systems. Exp Neurol 2020; 324:113121. [PMID: 31758983 PMCID: PMC6993945 DOI: 10.1016/j.expneurol.2019.113121] [Citation(s) in RCA: 114] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/29/2019] [Accepted: 11/19/2019] [Indexed: 12/22/2022]
Abstract
Paclitaxel (Brand name Taxol) is widely used in the treatment of common cancers like breast, ovarian and lung cancer. Although highly effective in blocking tumor progression, paclitaxel also causes peripheral neuropathy as a side effect in 60-70% of chemotherapy patients. Recent efforts by numerous labs have aimed at defining the underlying mechanisms of paclitaxel-induced peripheral neuropathy (PIPN). In vitro models using rodent dorsal root ganglion neurons, human induced pluripotent stem cells, and rodent in vivo models have revealed a number of molecular pathways affected by paclitaxel within axons of sensory neurons and within other cell types, such as the immune system and peripheral glia, as well skin. These studies revealed that paclitaxel induces altered calcium signaling, neuropeptide and growth factor release, mitochondrial damage and reactive oxygen species formation, and can activate ion channels that mediate responses to extracellular cues. Recent studies also suggest a role for the matrix-metalloproteinase 13 (MMP-13) in mediating neuropathy. These diverse changes may be secondary to paclitaxel-induced microtubule transport impairment. Human genetic studies, although still limited, also highlight the involvement of cytoskeletal changes in PIPN. Newly identified molecular targets resulting from these studies could provide the basis for the development of therapies with which to either prevent or reverse paclitaxel-induced peripheral neuropathy in chemotherapy patients.
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Affiliation(s)
- Nathan P Staff
- Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA
| | - Jill C Fehrenbacher
- Department of Pharmacology and Toxicology, University School of Medicine, Indianapolis, IN 46202, USA
| | - Martial Caillaud
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, USA
| | - M Imad Damaj
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, USA
| | - Rosalind A Segal
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Sandra Rieger
- Department of Biology, University of Miami, Coral Gables, FL 33146, USA.
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26
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Eldridge S, Guo L, Hamre J. A Comparative Review of Chemotherapy-Induced Peripheral Neuropathy in In Vivo and In Vitro Models. Toxicol Pathol 2020; 48:190-201. [PMID: 31331249 PMCID: PMC6917839 DOI: 10.1177/0192623319861937] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is an adverse effect caused by several classes of widely used anticancer therapeutics. Chemotherapy-induced peripheral neuropathy frequently leads to dose reduction or discontinuation of chemotherapy regimens, and CIPN symptoms can persist long after completion of chemotherapy and severely diminish the quality of life of patients. Differences in the clinical presentation of CIPN by widely diverse classifications of anticancer agents have spawned multiple mechanistic hypotheses that seek to explain the pathogenesis of CIPN. Despite its clinical relevance, common occurrence, and extensive investigation, the pathophysiology of CIPN remains unclear. Furthermore, there is no unequivocal gold standard for the prevention and treatment of CIPN. Herein, we review in vivo and in vitro models of CIPN with a focus on histopathological changes and morphological features aimed at understanding the pathophysiology of CIPN and identify gaps requiring deeper exploration. An elucidation of the underlying mechanisms of CIPN is imperative to identify potential targets and approaches for prevention and treatment.
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Affiliation(s)
- Sandy Eldridge
- Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, Maryland
| | - Liang Guo
- Laboratory of Investigative Toxicology, Frederick National Laboratory for Cancer Research, Frederick,
Maryland
| | - John Hamre
- Laboratory of Investigative Toxicology, Frederick National Laboratory for Cancer Research, Frederick,
Maryland
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27
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Analyzing chemotherapy-induced peripheral neuropathy in vivo using non-mammalian animal models. Exp Neurol 2019; 323:113090. [PMID: 31669484 DOI: 10.1016/j.expneurol.2019.113090] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/19/2019] [Accepted: 10/23/2019] [Indexed: 12/31/2022]
Abstract
Non-mammalian models of CIPN remain relatively sparse, but the knowledge gained from the few published studies suggest that these species have great potential to serve as a discovery platform for new pathways and underlying genetic mechanisms of CIPN. These models permit large-scale genetic and pharmacological screening, and they are highly suitable for in vivo imaging. CIPN phenotypes described in rodents have been confirmed in those models, and conversely, genetic players leading to axon de- and regeneration under conditions of chemotherapy treatment identified in these non-mammalian species have been validated in rodents. Given the need for non-traditional approaches with which to identify new CIPN mechanisms, these models bear a strong potential due to the conservation of basic mechanisms by which chemotherapeutic agents induce neurotoxicity.
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28
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Vysokov N, McMahon SB, Raouf R. The role of Na V channels in synaptic transmission after axotomy in a microfluidic culture platform. Sci Rep 2019; 9:12915. [PMID: 31501450 PMCID: PMC6733904 DOI: 10.1038/s41598-019-49214-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 08/20/2019] [Indexed: 01/07/2023] Open
Abstract
Voltage gated sodium channels are key players in aberrant pain signaling and sensitization of nociceptors after peripheral nerve injury. The extent to which sodium channel activity after injury contributes to synaptic transmission at the first pain synapse however remains unclear. To investigate the effect of axotomy on synaptic transmission between dorsal root ganglia neurons and dorsal horn neurons, we reconstructed the first pain synapse in a novel microfluidic based compartmentalized cell culture system, which recapitulates the connectivity of peripheral pain signaling. We show that following axotomy of the distal axons, inhibition of NaV1.7 and NaV1.8 sodium channels in incoming presynaptic DRG axons is no longer sufficient to block activation of these axons and the resulting synaptic transmission to dorsal horn neurons. We found that blockade of NaV1.6 activity is highly effective in reducing activation of incoming axons contributing to synaptic transmission after axotomy of DRG neurons. The microfluidic culture system described here offers an in vitro platform to recapitulate and study the first pain synapse.
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Affiliation(s)
- Nickolai Vysokov
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, United Kingdom
| | - Stephen B McMahon
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, United Kingdom
| | - Ramin Raouf
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE1 1UL, United Kingdom.
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29
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Visualization of Intra‐neuronal Motor Protein Transport through Upconversion Microscopy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Zeng X, Chen S, Weitemier A, Han S, Blasiak A, Prasad A, Zheng K, Yi Z, Luo B, Yang I, Thakor N, Chai C, Lim K, McHugh TJ, All AH, Liu X. Visualization of Intra‐neuronal Motor Protein Transport through Upconversion Microscopy. Angew Chem Int Ed Engl 2019; 58:9262-9268. [DOI: 10.1002/anie.201904208] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 04/26/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Xiao Zeng
- Department of ChemistryNational University of Singapore Singapore 117543 Singapore
| | - Shuo Chen
- Laboratory for Circuit and Behavioral PhysiologyRIKEN Center for Brain Science Wakoshi Saitama 351-0198 Japan
| | - Adam Weitemier
- Laboratory for Circuit and Behavioral PhysiologyRIKEN Center for Brain Science Wakoshi Saitama 351-0198 Japan
| | - Sanyang Han
- Department of ChemistryNational University of Singapore Singapore 117543 Singapore
| | - Agata Blasiak
- Singapore Institute of NeurotechnologyNational University of Singapore Singapore 117456 Singapore
| | - Ankshita Prasad
- Singapore Institute of NeurotechnologyNational University of Singapore Singapore 117456 Singapore
| | - Kezhi Zheng
- Department of ChemistryNational University of Singapore Singapore 117543 Singapore
| | - Zhigao Yi
- Department of ChemistryNational University of Singapore Singapore 117543 Singapore
| | - Baiwen Luo
- Singapore Institute of NeurotechnologyNational University of Singapore Singapore 117456 Singapore
| | - In‐Hong Yang
- Singapore Institute of NeurotechnologyNational University of Singapore Singapore 117456 Singapore
| | - Nitish Thakor
- Singapore Institute of NeurotechnologyNational University of Singapore Singapore 117456 Singapore
- Department of Biomedical EngineeringJohns Hopkins School of Medicine Baltimore MD 21205 USA
| | - Chou Chai
- Research DepartmentNational Neuroscience Institute Singapore 308433 Singapore
- Department of PhysiologyNational University of Singapore Singapore 117593 Singapore
| | - Kah‐Leong Lim
- Research DepartmentNational Neuroscience Institute Singapore 308433 Singapore
- Department of PhysiologyNational University of Singapore Singapore 117593 Singapore
| | - Thomas J. McHugh
- Laboratory for Circuit and Behavioral PhysiologyRIKEN Center for Brain Science Wakoshi Saitama 351-0198 Japan
- Department of Life SciencesGraduate School of Arts and SciencesUniversity of Tokyo Tokyo Japan
| | - Angelo H. All
- Singapore Institute of NeurotechnologyNational University of Singapore Singapore 117456 Singapore
- Department of Biomedical EngineeringJohns Hopkins School of Medicine Baltimore MD 21205 USA
- Department of NeurologyJohns Hopkins School of Medicine Baltimore MD 21205 USA
| | - Xiaogang Liu
- Department of ChemistryNational University of Singapore Singapore 117543 Singapore
- Singapore Institute of NeurotechnologyNational University of Singapore Singapore 117456 Singapore
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31
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Zhong S, Zhou Z, Liang Y, Cheng X, Li Y, Teng W, Zhao M, Liu C, Guan M, Zhao C. Targeting strategies for chemotherapy-induced peripheral neuropathy: does gut microbiota play a role? Crit Rev Microbiol 2019; 45:369-393. [PMID: 31106639 DOI: 10.1080/1040841x.2019.1608905] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a progressive, often irreversible condition that produces severe neurological deficits. Emerging data suggest that chemotherapy also exerts detrimental effects on gut microbiota composition and intestinal permeability, contributing to dysbiosis and inflammation. Compared with other complications associated with chemotherapy, such as diarrhoea and mucositis, CIPN is of particular concern because it is the most common reason for terminating or suspending treatment. However, specific and effective curative treatment strategies are lacking. In this review, we provide an update on current preclinical and clinical understandings about the role of gut microbiota in CIPN. The gut microbiota serves as an intersection between the microbiome-gut-brain and the neuroimmune-endocrine axis, forming a complex network that can directly or indirectly affect key components involved in the manifestations of CIPN. Herein, we discuss several potential mechanisms within the context of the networks and summarize alterations in gut microbiome induced by chemotherapeutic drugs, providing great potential for researchers to target pathways associated with the gut microbiome and overcome CIPN.
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Affiliation(s)
- Shanshan Zhong
- Department of Neurology and Stroke Center, The First Hospital of China Medical University , Shenyang , PR China
| | - Zhike Zhou
- Department of Geriatrics, The First Hospital of China Medical University , Shenyang , PR China
| | - Yifan Liang
- Department of Neurology and Stroke Center, The First Hospital of China Medical University , Shenyang , PR China
| | - Xi Cheng
- Department of Neurology and Stroke Center, The First Hospital of China Medical University , Shenyang , PR China
| | - Yong Li
- Department of Biochemistry and Molecular Cell Biology, Shanghai Jiao Tong University , Shenyang , PR China
| | - Weiyu Teng
- Department of Neurology and Stroke Center, The First Hospital of China Medical University , Shenyang , PR China
| | - Mei Zhao
- Department of Cardiology, Shengjing Hospital of China Medical University , Shenyang , PR China
| | - Chang Liu
- Department of Neurology and Stroke Center, The First Hospital of China Medical University , Shenyang , PR China
| | - Meiting Guan
- Department of Neurology and Stroke Center, The First Hospital of China Medical University , Shenyang , PR China
| | - Chuansheng Zhao
- Department of Neurology and Stroke Center, The First Hospital of China Medical University , Shenyang , PR China
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32
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Dorsal root ganglion explants derived from chemotherapy-treated mice have reduced neurite outgrowth in culture. Neurosci Lett 2019; 694:14-19. [DOI: 10.1016/j.neulet.2018.11.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 10/31/2018] [Accepted: 11/10/2018] [Indexed: 11/23/2022]
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33
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Fantuzzo JA, Hart RP, Zahn JD, Pang ZP. Compartmentalized Devices as Tools for Investigation of Human Brain Network Dynamics. Dev Dyn 2019; 248:65-77. [PMID: 30117633 PMCID: PMC6312734 DOI: 10.1002/dvdy.24665] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/27/2018] [Accepted: 07/27/2018] [Indexed: 12/18/2022] Open
Abstract
Neuropsychiatric disorders have traditionally been difficult to study due to the complexity of the human brain and limited availability of human tissue. Induced pluripotent stem (iPS) cells provide a promising avenue to further our understanding of human disease mechanisms, but traditional 2D cell cultures can only provide a limited view of the neural circuits. To better model complex brain neurocircuitry, compartmentalized culturing systems and 3D organoids have been developed. Early compartmentalized devices demonstrated how neuronal cell bodies can be isolated both physically and chemically from neurites. Soft lithographic approaches have advanced this approach and offer the tools to construct novel model platforms, enabling circuit-level studies of disease, which can accelerate mechanistic studies and drug candidate screening. In this review, we describe some of the common technologies used to develop such systems and discuss how these lithographic techniques have been used to advance our understanding of neuropsychiatric disease. Finally, we address other in vitro model platforms such as 3D culture systems and organoids and compare these models with compartmentalized models. We ask important questions regarding how we can further harness iPS cells in these engineered culture systems for the development of improved in vitro models. Developmental Dynamics 248:65-77, 2019. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Joseph A Fantuzzo
- Child Health Institute of New Jersey, Robert Wood Johnson Medical School, New Brunswick, New Jersey
- Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey
| | - Ronald P Hart
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, New Jersey
| | - Jeffrey D Zahn
- Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey
| | - Zhiping P Pang
- Child Health Institute of New Jersey, Robert Wood Johnson Medical School, New Brunswick, New Jersey
- Department of Neuroscience and Cell Biology, Research Tower, Piscataway, New Jersey
- Pediatrics, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
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34
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Duru LN, Quan Z, Qazi TJ, Qing H. Stem cells technology: a powerful tool behind new brain treatments. Drug Deliv Transl Res 2018; 8:1564-1591. [PMID: 29916013 DOI: 10.1007/s13346-018-0548-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Stem cell research has recently become a hot research topic in biomedical research due to the foreseen unlimited potential of stem cells in tissue engineering and regenerative medicine. For many years, medicine has been facing intense challenges, such as an insufficient number of organ donations that is preventing clinicians to fulfill the increasing needs. To try and overcome this regrettable matter, research has been aiming at developing strategies to facilitate the in vitro culture and study of stem cells as a tool for tissue regeneration. Meanwhile, new developments in the microfluidics technology brought forward emerging cell culture applications that are currently allowing for a better chemical and physical control of cellular microenvironment. This review presents the latest developments in stem cell research that brought new therapies to the clinics and how the convergence of the microfluidics technology with stem cell research can have positive outcomes on the fields of regenerative medicine and high-throughput screening. These advances will bring new translational solutions for drug discovery and will upgrade in vitro cell culture to a new level of accuracy and performance. We hope this review will provide new insights into the understanding of new brain treatments from the perspective of stem cell technology especially regarding regenerative medicine and tissue engineering.
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Affiliation(s)
- Lucienne N Duru
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Zhenzhen Quan
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Talal Jamil Qazi
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Hong Qing
- School of Life Science, Beijing Institute of Technology, Beijing, China. .,Beijing Key Laboratory of Separation and Analysis in Biomedical and Pharmaceuticals, Department of Biomedical Engineering, School of Life Science, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China.
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35
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Badiola-Mateos M, Hervera A, Del Río JA, Samitier J. Challenges and Future Prospects on 3D in-vitro Modeling of the Neuromuscular Circuit. Front Bioeng Biotechnol 2018; 6:194. [PMID: 30622944 PMCID: PMC6297173 DOI: 10.3389/fbioe.2018.00194] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 11/27/2018] [Indexed: 12/18/2022] Open
Abstract
Movement of skeletal-muscle fibers is generated by the coordinated action of several cells taking part within the locomotion circuit (motoneurons, sensory-neurons, Schwann cells, astrocytes, microglia, and muscle-cells). Failures in any part of this circuit could impede or hinder coordinated muscle movement and cause a neuromuscular disease (NMD) or determine its severity. Studying fragments of the circuit cannot provide a comprehensive and complete view of the pathological process. We trace the historic developments of studies focused on in-vitro modeling of the spinal-locomotion circuit and how bioengineered innovative technologies show advantages for an accurate mimicking of physiological conditions of spinal-locomotion circuit. New developments on compartmentalized microfluidic culture systems (cμFCS), the use of human induced pluripotent stem cells (hiPSCs) and 3D cell-cultures are analyzed. We finally address limitations of current study models and three main challenges on neuromuscular studies: (i) mimic the whole spinal-locomotion circuit including all cell-types involved and the evaluation of independent and interdependent roles of each one; (ii) mimic the neurodegenerative response of mature neurons in-vitro as it occurs in-vivo; and (iii) develop, tune, implement, and combine cμFCS, hiPSC, and 3D-culture technologies to ultimately create patient-specific complete, translational, and reliable NMD in-vitro model. Overcoming these challenges would significantly facilitate understanding the events taking place in NMDs and accelerate the process of finding new therapies.
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Affiliation(s)
- Maider Badiola-Mateos
- Institute for Bioengineering of Catalonia-Barcelona Institute of Science and Technology, Barcelona, Spain.,Department of Electronics and Biomedical Engineering, Faculty of Physics, Universitat de Barcelona, Barcelona, Spain
| | - Arnau Hervera
- Institute for Bioengineering of Catalonia-Barcelona Institute of Science and Technology, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Barcelona, Spain.,Institut de Neurociències de la Universitat de Barcelona, Barcelona, Spain
| | - José Antonio Del Río
- Institute for Bioengineering of Catalonia-Barcelona Institute of Science and Technology, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Barcelona, Spain.,Institut de Neurociències de la Universitat de Barcelona, Barcelona, Spain
| | - Josep Samitier
- Institute for Bioengineering of Catalonia-Barcelona Institute of Science and Technology, Barcelona, Spain.,Department of Electronics and Biomedical Engineering, Faculty of Physics, Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina, Madrid, Spain
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36
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Stefen H, Hassanzadeh-Barforoushi A, Brettle M, Fok S, Suchowerska AK, Tedla N, Barber T, Warkiani ME, Fath T. A Novel Microfluidic Device-Based Neurite Outgrowth Inhibition Assay Reveals the Neurite Outgrowth-Promoting Activity of Tropomyosin Tpm3.1 in Hippocampal Neurons. Cell Mol Neurobiol 2018; 38:1557-1563. [PMID: 30218404 DOI: 10.1007/s10571-018-0620-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 09/06/2018] [Indexed: 11/28/2022]
Abstract
Overcoming neurite inhibition is integral for restoring neuronal connectivity after CNS injury. Actin dynamics are critical for neurite growth cone formation and extension. The tropomyosin family of proteins is a regarded as master regulator of actin dynamics. This study investigates tropomyosin isoform 3.1 (Tpm3.1) as a potential candidate for overcoming an inhibitory substrate, as it is known to influence neurite branching and outgrowth. We designed a microfluidic device that enables neurons to be grown adjacent to an inhibitory substrate, Nogo-66. Results show that neurons, overexpressing hTpm3.1, have an increased propensity to overcome Nogo-66 inhibition. We propose Tpm3.1 as a potential target for promoting neurite growth in an inhibitory environment in the central nervous system.
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Affiliation(s)
- Holly Stefen
- Neurodegenerative and Repair Unit, School of Medical Science, UNSW Sydney, Sydney, NSW, Australia.,Neuron Culture Core Facility (NCCF), University of New South Wales, Sydney, NSW, Australia
| | - Amin Hassanzadeh-Barforoushi
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.,Cancer Division, Garvan Institute of Medical Research/The Kinghorn Cancer Centre, Sydney, NSW, 2010, Australia
| | - Merryn Brettle
- Neurodegenerative and Repair Unit, School of Medical Science, UNSW Sydney, Sydney, NSW, Australia
| | - Sandra Fok
- Neurodegenerative and Repair Unit, School of Medical Science, UNSW Sydney, Sydney, NSW, Australia
| | - Alexandra K Suchowerska
- Neurodegenerative and Repair Unit, School of Medical Science, UNSW Sydney, Sydney, NSW, Australia
| | - Nicodemus Tedla
- Inflammation Research, School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Tracie Barber
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Majid Ebrahimi Warkiani
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia. .,Institute of Molecular Medicine, Sechenov First Moscow State University, Moscow, 119991, Russia.
| | - Thomas Fath
- Neurodegenerative and Repair Unit, School of Medical Science, UNSW Sydney, Sydney, NSW, Australia. .,Neuron Culture Core Facility (NCCF), University of New South Wales, Sydney, NSW, Australia. .,Faculty of Medicine and Health Sciences, Dementia Research Centre, Macquarie University, Sydney, NSW, 2019, Australia.
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37
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Guo F, Shang J, Zhao H, Lai K, Li Y, Fan Z, Hou Z, Su G. Cube-shaped theranostic paclitaxel prodrug nanocrystals with surface functionalization of SPC and MPEG-DSPE for imaging and chemotherapy. Colloids Surf B Biointerfaces 2017; 160:649-660. [PMID: 29031225 DOI: 10.1016/j.colsurfb.2017.10.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/20/2017] [Accepted: 10/03/2017] [Indexed: 12/28/2022]
Abstract
As one of nanomedicine delivery systems (NDSs), drug nanocrystals exhibited an excellent anticancer effect. Recently, differences of internalization mechanisms and subcellular localization of both drug nanocrystals and small molecular free drug have drawn much attention. In this paper, paclitaxel (PTX) as a model anticancer drug was directly labeled with 4-chloro-7-nitro-1, 2, 3-benzoxadiazole (NBD-Cl) (a drug-fluorophore conjugate Ma et al. (2016) and Wang et al. (2016) [1,2] (PTX-NBD)). PTX-NBD was synthesized by nucleophilic substitution reaction of PTX with NBD-Cl in high yield and characterized by fluorescence, XRD, ESI-MS, and FT-IR analysis. Subsequently, the cube-shaped PTX-NBD nanocrystals were prepared with an antisolvent method followed by surface functionalization of SPC and MPEG-DSPE. The obtained specific shaped PTX-NBD@PC-PEG NCs had a hydrodynamic particle size of ∼50nm, excellent colloidal stability, and a high drug-loading content of ∼64%. Moreover, in comparison with free PTX-NBD and the sphere-shaped PTX-NBD nanocrystals with surface functionalization of SPC and MPEG-DSPE (PTX-NBD@PC-PEG NSs), PTX-NBD@PC-PEG NCs remarkably reduced burst release and improved cellular uptake efficiency and in vitro cancer cell killing ability. In a word, the work highlights the potential of theranostic prodrug nanocrystals based on the drug-fluorophore conjugates for cell imaging and chemotherapy.
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Affiliation(s)
- Fuqiang Guo
- Department of Physics, Changji University, Changji, 831100, China
| | - Jiajia Shang
- Department of Physics, Changji University, Changji, 831100, China; Key Laboratory of Biomedical Engineering of Fujian Province University/Research Center of Biomedical Engineering of Xiamen, Department of Biomaterials, College of Materials, Xiamen University, Xiamen 361005, China
| | - Hai Zhao
- Department of Physics, Changji University, Changji, 831100, China
| | - Kangrong Lai
- Department of Physics, Changji University, Changji, 831100, China
| | - Yang Li
- Key Laboratory of Biomedical Engineering of Fujian Province University/Research Center of Biomedical Engineering of Xiamen, Department of Biomaterials, College of Materials, Xiamen University, Xiamen 361005, China
| | - Zhongxiong Fan
- Department of Physics, Changji University, Changji, 831100, China; Key Laboratory of Biomedical Engineering of Fujian Province University/Research Center of Biomedical Engineering of Xiamen, Department of Biomaterials, College of Materials, Xiamen University, Xiamen 361005, China.
| | - Zhenqing Hou
- Department of Physics, Changji University, Changji, 831100, China; Key Laboratory of Biomedical Engineering of Fujian Province University/Research Center of Biomedical Engineering of Xiamen, Department of Biomaterials, College of Materials, Xiamen University, Xiamen 361005, China.
| | - Guanghao Su
- Institute of Pediatric Research, Children's Hospital of Soochow University, 92 Zhongnan Street, Suzhou 215025, China.
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38
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Pease-Raissi SE, Pazyra-Murphy MF, Li Y, Wachter F, Fukuda Y, Fenstermacher SJ, Barclay LA, Bird GH, Walensky LD, Segal RA. Paclitaxel Reduces Axonal Bclw to Initiate IP 3R1-Dependent Axon Degeneration. Neuron 2017; 96:373-386.e6. [PMID: 29024661 DOI: 10.1016/j.neuron.2017.09.034] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 07/19/2017] [Accepted: 09/22/2017] [Indexed: 01/23/2023]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a debilitating side effect of many cancer treatments. The hallmark of CIPN is degeneration of long axons required for transmission of sensory information; axonal degeneration causes impaired tactile sensation and persistent pain. Currently the molecular mechanisms of CIPN are not understood, and there are no available treatments. Here we show that the chemotherapeutic agent paclitaxel triggers CIPN by altering IP3 receptor phosphorylation and intracellular calcium flux, and activating calcium-dependent calpain proteases. Concomitantly paclitaxel impairs axonal trafficking of RNA-granules and reduces synthesis of Bclw (bcl2l2), a Bcl2 family member that binds IP3R1 and restrains axon degeneration. Surprisingly, Bclw or a stapled peptide corresponding to the Bclw BH4 domain interact with axonal IP3R1 and prevent paclitaxel-induced degeneration, while Bcl2 and BclxL cannot do so. Together these data identify a Bclw-IP3R1-dependent cascade that causes axon degeneration and suggest that Bclw-mimetics could provide effective therapy to prevent CIPN.
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Affiliation(s)
- Sarah E Pease-Raissi
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA; Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Maria F Pazyra-Murphy
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA; Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Yihang Li
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA; Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Franziska Wachter
- Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Linde Program in Cancer Chemical Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Yusuke Fukuda
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA; Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Sara J Fenstermacher
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA; Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Lauren A Barclay
- Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Linde Program in Cancer Chemical Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Gregory H Bird
- Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Linde Program in Cancer Chemical Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Loren D Walensky
- Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Linde Program in Cancer Chemical Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Rosalind A Segal
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA; Departments of Cancer Biology and Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA.
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39
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Fukuda Y, Li Y, Segal RA. A Mechanistic Understanding of Axon Degeneration in Chemotherapy-Induced Peripheral Neuropathy. Front Neurosci 2017; 11:481. [PMID: 28912674 PMCID: PMC5583221 DOI: 10.3389/fnins.2017.00481] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 08/14/2017] [Indexed: 12/12/2022] Open
Abstract
Chemotherapeutic agents cause many short and long term toxic side effects to peripheral nervous system (PNS) that drastically alter quality of life. Chemotherapy-induced peripheral neuropathy (CIPN) is a common and enduring disorder caused by several anti-neoplastic agents. CIPN typically presents with neuropathic pain, numbness of distal extremities, and/or oversensitivity to thermal or mechanical stimuli. This adverse side effect often requires a reduction in chemotherapy dosage or even discontinuation of treatment. Currently there are no effective treatment options for CIPN. While the underlying mechanisms for CIPN are not understood, current data identify a “dying back” axon degeneration of distal nerve endings as the major pathology in this disorder. Therefore, mechanistic understanding of axon degeneration will provide insights into the pathway and molecular players responsible for CIPN. Here, we review recent findings that expand our understanding of the pathogenesis of CIPN and discuss pathways that may be shared with the axonal degeneration that occurs during developmental axon pruning and during injury-induced Wallerian degeneration. These mechanistic insights provide new avenues for development of therapies to prevent or treat CIPN.
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Affiliation(s)
- Yusuke Fukuda
- Department of Neurobiology, Harvard Medical SchoolBoston, MA, United States.,Department of Cancer Biology, Dana-Farber Cancer InstituteBoston, MA, United States
| | - Yihang Li
- Department of Neurobiology, Harvard Medical SchoolBoston, MA, United States.,Department of Cancer Biology, Dana-Farber Cancer InstituteBoston, MA, United States
| | - Rosalind A Segal
- Department of Neurobiology, Harvard Medical SchoolBoston, MA, United States.,Department of Cancer Biology, Dana-Farber Cancer InstituteBoston, MA, United States
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40
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Li Y, Chen Y, Tan L, Pan JY, Lin WW, Wu J, Hu W, Chen X, Wang XD. RNAi-mediated ephrin-B2 silencing attenuates astroglial-fibrotic scar formation and improves spinal cord axon growth. CNS Neurosci Ther 2017; 23:779-789. [PMID: 28834283 DOI: 10.1111/cns.12723] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 07/23/2017] [Accepted: 07/25/2017] [Indexed: 12/14/2022] Open
Abstract
AIMS Astroglial-fibrotic scar formation following central nervous system injury can help repair blood-brain barrier and seal the lesion, whereas it also represents a strong barrier for axonal regeneration. Intensive preclinical efforts have been made to eliminate/reduce the inhibitory part and, in the meantime, preserve the beneficial role of astroglial-fibrotic scar. METHODS In this study, we established an in vitro system, in which coculture of astrocytes and meningeal fibroblasts was treated with exogenous transforming growth factor-β1 (TGF-β1) to form astroglial-fibrotic scar-like cell clusters, and thereby evaluated the efficacy of RNAi targeting ephrin-B2 in preventing scar formation from the very beginning. We further tested the effect of RNAi-based mitigation of astroglial-fibrotic scar on spinal axon outgrowth on a custom-made microfluidic platform. RESULTS We found that siRNA targeting ephrin-B2 significantly reduced both the number and the diameter of cell clusters induced by TGF-β1 and diminished the expression of aggrecan and versican in the coculture, and allowed for significantly longer extension of outgrowing spinal cord axons into astroglial-fibrotic scar as assessed on the microfluidic platform. CONCLUSIONS These results suggest that astroglial-fibrotic scar formation and particularly the expression of aggrecan and versican could be mitigated by ephrin-B2 specific siRNA, thus improving the microenvironment for spinal axon regeneration.
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Affiliation(s)
- Yi Li
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, China
| | - Ying Chen
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, China
| | - Ling Tan
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, China
| | - Jing-Ying Pan
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, China
| | - Wei-Wei Lin
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, China
| | - Jian Wu
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, China
| | - Wen Hu
- Key Laboratory for Neuroregeneration of Ministry of Education and Co-innovation Center for Neuroregeneration of Jiangsu Province, Nantong University, Nantong, China
| | - Xue Chen
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, China.,Wuxi Medical College, Jiangnan University, Wuxi, China
| | - Xiao-Dong Wang
- Department of Histology and Embryology, Medical College, Nantong University, Nantong, China.,Key Laboratory for Neuroregeneration of Ministry of Education and Co-innovation Center for Neuroregeneration of Jiangsu Province, Nantong University, Nantong, China
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41
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Prasad A, Teh DBL, Blasiak A, Chai C, Wu Y, Gharibani PM, Yang IH, Phan TT, Lim KL, Yang H, Liu X, All AH. Static Magnetic Field Stimulation Enhances Oligodendrocyte Differentiation and Secretion of Neurotrophic Factors. Sci Rep 2017; 7:6743. [PMID: 28751716 PMCID: PMC5532210 DOI: 10.1038/s41598-017-06331-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 06/12/2017] [Indexed: 02/02/2023] Open
Abstract
The cellular-level effects of low/high frequency oscillating magnetic field on excitable cells such as neurons are well established. In contrast, the effects of a homogeneous, static magnetic field (SMF) on Central Nervous System (CNS) glial cells are less investigated. Here, we have developed an in vitro SMF stimulation set-up to investigate the genomic effects of SMF exposure on oligodendrocyte differentiation and neurotrophic factors secretion. Human oligodendrocytes precursor cells (OPCs) were stimulated with moderate intensity SMF (0.3 T) for a period of two weeks (two hours/day). The differential gene expression of cell activity marker (c-fos), early OPC (Olig1, Olig2. Sox10), and mature oligodendrocyte markers (CNP, MBP) were quantified. The enhanced myelination capacity of the SMF stimulated oligodendrocytes was validated in a dorsal root ganglion microfluidics chamber platform. Additionally, the effects of SMF on the gene expression and secretion of neurotrophic factors- BDNF and NT3 was quantified. We also report that SMF stimulation increases the intracellular calcium influx in OPCs as well as the gene expression of L-type channel subunits-CaV1.2 and CaV1.3. Our findings emphasize the ability of glial cells such as OPCs to positively respond to moderate intensity SMF stimulation by exhibiting enhanced differentiation, functionality as well as neurotrophic factor release.
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Affiliation(s)
- Ankshita Prasad
- Department of Biomedical Engineering, National University of Singapore, E4, 4 Engineering Drive 3, Singapore, 117583, Singapore
| | - Daniel B Loong Teh
- Singapore Institute of Neurotechnology (SINAPSE), National University of Singapore, 28 Medical Drive, 5-COR, Singapore, 117456, Singapore
| | - Agata Blasiak
- Singapore Institute of Neurotechnology (SINAPSE), National University of Singapore, 28 Medical Drive, 5-COR, Singapore, 117456, Singapore
| | - Chou Chai
- National Neuroscience Institute, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
| | - Yang Wu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583, Singapore
| | - Payam M Gharibani
- Department of Biomedical Engineering, John Hopkins School of Medicine, 701C Rutland Avenue 720, Baltimore, MD, 21205, USA
| | - In Hong Yang
- Singapore Institute of Neurotechnology (SINAPSE), National University of Singapore, 28 Medical Drive, 5-COR, Singapore, 117456, Singapore.,Department of Biomedical Engineering, John Hopkins School of Medicine, 701C Rutland Avenue 720, Baltimore, MD, 21205, USA
| | - Thang T Phan
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 119228, Singapore
| | - Kah Leong Lim
- National Neuroscience Institute, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore.,Department of Physiology, 2 Medical Drive, MD9, National University of Singapore, 117593, Singapore, Singapore.,Duke-NUS Medical School. 8 College Road, 169857, Singapore, Singapore
| | - Hyunsoo Yang
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583, Singapore
| | - Xiaogang Liu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore.
| | - Angelo H All
- Department of Biomedical Engineering, John Hopkins School of Medicine, 701C Rutland Avenue 720, Baltimore, MD, 21205, USA. .,Department of Neurology, John Hopkins School of Medicine, 701C Rutland Avenue 720, Baltimore, MD, 21205, USA.
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42
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Subcellular electrical stimulation of neurons enhances the myelination of axons by oligodendrocytes. PLoS One 2017; 12:e0179642. [PMID: 28671962 PMCID: PMC5495216 DOI: 10.1371/journal.pone.0179642] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 06/01/2017] [Indexed: 11/30/2022] Open
Abstract
Myelin formation has been identified as a modulator of neural plasticity. New tools are required to investigate the mechanisms by which environmental inputs and neural activity regulate myelination patterns. In this study, we demonstrate a microfluidic compartmentalized culture system with integrated electrical stimulation capabilities that can induce neural activity by whole cell and focal stimulation. A set of electric field simulations was performed to confirm spatial restriction of the electrical input in the compartmentalized culture system. We further demonstrate that electrode localization is a key consideration for generating uniform the stimulation of neuron and oligodendrocytes within the compartments. Using three configurations of the electrodes we tested the effects of subcellular activation of neural activity on distal axon myelination with oligodendrocytes. We further investigated if oligodendrocytes have to be exposed to the electrical field to induce axon myelination. An isolated stimulation of cell bodies and proximal axons had the same effect as an isolated stimulation of distal axons co-cultured with oligodendrocytes, and the two modes had a non-different result than whole cell stimulation. Our platform enabled the demonstration that electrical stimulation enhances oligodendrocyte maturation and myelin formation independent of the input localization and oligodendrocyte exposure to the electrical field.
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43
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Starobova H, Vetter I. Pathophysiology of Chemotherapy-Induced Peripheral Neuropathy. Front Mol Neurosci 2017; 10:174. [PMID: 28620280 PMCID: PMC5450696 DOI: 10.3389/fnmol.2017.00174] [Citation(s) in RCA: 363] [Impact Index Per Article: 51.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 05/17/2017] [Indexed: 12/11/2022] Open
Abstract
Chemotherapy-induced neuropathy is a common, dose-dependent adverse effect of several antineoplastics. It can lead to detrimental dose reductions and discontinuation of treatment, and severely affects the quality of life of cancer survivors. Clinically, chemotherapy-induced peripheral neuropathy presents as deficits in sensory, motor, and autonomic function which develop in a glove and stocking distribution due to preferential effects on longer axons. The pathophysiological processes are multi-factorial and involve oxidative stress, apoptotic mechanisms, altered calcium homeostasis, axon degeneration and membrane remodeling as well as immune processes and neuroinflammation. This review focusses on the commonly used antineoplastic substances oxaliplatin, cisplatin, vincristine, docetaxel, and paclitaxel which interfere with the cancer cell cycle-leading to cell death and tumor degradation-and cause severe acute and chronic peripheral neuropathies. We discuss drug mechanism of action and pharmacokinetic disposition relevant to the development of peripheral neuropathy, the epidemiology and clinical presentation of chemotherapy-induced neuropathy, emerging insight into genetic susceptibilities as well as current understanding of the pathophysiology and treatment approaches.
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Affiliation(s)
- Hana Starobova
- Centre for Pain Research, Institute for Molecular Bioscience, University of QueenslandSt Lucia, QLD, Australia
| | - Irina Vetter
- Centre for Pain Research, Institute for Molecular Bioscience, University of QueenslandSt Lucia, QLD, Australia.,School of Pharmacy, University of QueenslandSt Lucia, QLD, Australia
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44
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Guo L, Hamre J, Eldridge S, Behrsing HP, Cutuli FM, Mussio J, Davis M. Editor's Highlight: Multiparametric Image Analysis of Rat Dorsal Root Ganglion Cultures to Evaluate Peripheral Neuropathy-Inducing Chemotherapeutics. Toxicol Sci 2017; 156:275-288. [PMID: 28115644 PMCID: PMC5837782 DOI: 10.1093/toxsci/kfw254] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a major, dose-limiting adverse effect experienced by cancer patients. Advancements in mechanism-based risk mitigation and effective treatments for CIPN can be aided by suitable in vitro assays. To this end, we developed a multiparametric morphology-centered rat dorsal root ganglion (DRG) assay. Morphologic alterations in subcellular structures of neurons and non-neurons were analyzed with an automated microscopy system. Stains for NeuN (a neuron-specific nuclear protein) and Tuj-1 (β-III tubulin) were used to identify neuronal cell nuclei and neuronal cell bodies/neurites, respectively. Vimentin staining (a component of Schwann cell intermediate filaments) was used to label non-neuronal supporting cells. Nuclei that stained with DAPI, but lacked NeuN represented non-neuronal cells. Images were analyzed following 24 h of continuous exposure to CIPN-inducing agents and 72 h after drug removal to provide a dynamic measure of recovery from initial drug effects. Treatment with bortezomib, cisplatin, eribulin, paclitaxel or vincristine induced a dose-dependent loss of neurite/process areas, mimicking the 'dying back' degeneration of axons, a histopathological hallmark of clinical CIPN in vivo. The IC50 for neurite loss was within 3-fold of the maximal clinical exposure (Cmax) for all five CIPN-inducing drugs, but was >4- or ≥ 28-fold of the Cmax for 2 non-CIPN-inducing agents. Compound-specific effects, eg, neurite fragmentation by cisplatin or bortezomib and enlarged neuronal cell bodies by paclitaxel, were also observed. Collectively, these results support the use of a quantitative, morphologic evaluation and a DRG cell culture model to inform risk and examine mechanisms of CIPN.
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Affiliation(s)
- Liang Guo
- Laboratory of Investigative Toxicology, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, Maryland 21702
| | - John Hamre
- Laboratory of Investigative Toxicology, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, Maryland 21702
| | - Sandy Eldridge
- Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, Maryland 20892
| | - Holger P. Behrsing
- Laboratory of Investigative Toxicology, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, Maryland 21702
| | - Facundo M. Cutuli
- Laboratory of Investigative Toxicology, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, Maryland 21702
| | - Jodie Mussio
- Laboratory of Investigative Toxicology, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, Maryland 21702
| | - Myrtle Davis
- Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, Maryland 20892
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45
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Nakamura I, Ichimura E, Goda R, Hayashi H, Mashiba H, Nagai D, Yokoyama H, Onda T, Masuda A. An in vivo mechanism for the reduced peripheral neurotoxicity of NK105: a paclitaxel-incorporating polymeric micellar nanoparticle formulation. Int J Nanomedicine 2017; 12:1293-1304. [PMID: 28243090 PMCID: PMC5317268 DOI: 10.2147/ijn.s114356] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
In our previous rodent studies, the paclitaxel (PTX)-incorporating polymeric micellar nanoparticle formulation NK105 had showed significantly stronger antitumor effects and reduced peripheral neurotoxicity than PTX dissolved in Cremophor® EL and ethanol (PTX/CRE). Thus, to elucidate the mechanisms underlying reduced peripheral neurotoxicity due to NK105, we performed pharmacokinetic analyses of NK105 and PTX/CRE in rats. Among neural tissues, the highest PTX concentrations were found in the dorsal root ganglion (DRG). Moreover, exposure of DRG to PTX (Cmax_PTX and AUC0-inf._PTX) in the NK105 group was almost half that in the PTX/CRE group, whereas exposure of sciatic and sural nerves was greater in the NK105 group than in the PTX/CRE group. In histopathological analyses, damage to DRG and both peripheral nerves was less in the NK105 group than in the PTX/CRE group. The consistency of these pharmacokinetic and histopathological data suggests that high levels of PTX in the DRG play an important role in the induction of peripheral neurotoxicity, and reduced distribution of PTX to the DRG of NK105-treated rats limits the ensuing peripheral neurotoxicity. In further analyses of PTX distribution to the DRG, Evans blue (Eb) was injected with BODIPY®-labeled NK105 into rats, and Eb fluorescence was observed only in the DRG. Following injection, most Eb dye bound to albumin particles of ~8 nm and had penetrated the DRG. In contrast, BODIPY®–NK105 particles of ~90 nm were not found in the DRG, suggesting differential penetration based on particle size. Because PTX also circulates as PTX–albumin particles of ~8 nm following injection of PTX/CRE, reduced peripheral neurotoxicity of NK105 may reflect exclusion from the DRG due to particle size, leading to reduced PTX levels in rat DRG (275).
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Affiliation(s)
- Iwao Nakamura
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
| | - Eiji Ichimura
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
| | - Rika Goda
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
| | - Hitomi Hayashi
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
| | - Hiroko Mashiba
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
| | - Daichi Nagai
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
| | - Hirofumi Yokoyama
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
| | - Takeshi Onda
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
| | - Akira Masuda
- Nanomedicine Group, Pharmaceutical Research Laboratories, Nippon Kayaku Co., Ltd., Tokyo, Japan
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46
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Gornstein EL, Schwarz TL. Neurotoxic mechanisms of paclitaxel are local to the distal axon and independent of transport defects. Exp Neurol 2016; 288:153-166. [PMID: 27894788 DOI: 10.1016/j.expneurol.2016.11.015] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/22/2016] [Accepted: 11/23/2016] [Indexed: 11/15/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a dose-limiting side effect of paclitaxel and other chemotherapeutic agents. Paclitaxel binds and stabilizes microtubules, but the cellular mechanisms that underlie paclitaxel's neurotoxic effects are not well understood. We therefore used primary cultures of adult murine dorsal root ganglion neurons, the cell type affected in patients, to examine leading hypotheses to explain paclitaxel neurotoxicity. We address the role of microtubule hyperstabilization and its downstream effects. Paclitaxel administered at 10-50nM for 1-3days induced retraction bulbs at the tips of axons and arrested axon growth without triggering axon fragmentation or cell death. By correlating the toxic effects and microtubule stabilizing activity of structurally different microtubule stabilizing compounds, we confirmed that microtubule hyperstabilization, rather than an off-target effect, is the likely primary cause of paclitaxel neurotoxicity. We examined potential downstream consequences of microtubule hyperstabilization and found that changes in levels of tubulin posttranslational modifications, although present after paclitaxel exposure, are not implicated in the paclitaxel neurotoxicity we observed in the cultures. Additionally, defects in axonal transport were not implicated as an early, causative mechanism of paclitaxel's toxic effects on dorsal root ganglion neurons. By using microfluidic chambers to selectively treat different parts of the axon with paclitaxel, we found that the distal axon was primarily vulnerable to paclitaxel, indicating that paclitaxel acts directly on the distal axon to induce degenerative effects. Together, our findings point to local effects of microtubule hyperstabilization on the distal-most portion of the axon as an early mediator of paclitaxel neurotoxicity. Because sensory neurons have a unique and ongoing requirement for distal growth in order to reinnervate the epidermis as it turns over, we propose that the ability of paclitaxel to arrest their growth accounts for the selective vulnerability of sensory neurons to paclitaxel neurotoxicity.
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Affiliation(s)
- Erica L Gornstein
- The F.M. Kirby Neurobiology Center, Children's Hospital Boston, Boston, MA 02115, USA; Biological and Biomedical Sciences Program, Harvard Medical School, Boston, MA 02115, USA
| | - Thomas L Schwarz
- The F.M. Kirby Neurobiology Center, Children's Hospital Boston, Boston, MA 02115, USA.
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47
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Lee HU, Nag S, Blasiak A, Jin Y, Thakor N, Yang IH. Subcellular Optogenetic Stimulation for Activity-Dependent Myelination of Axons in a Novel Microfluidic Compartmentalized Platform. ACS Chem Neurosci 2016; 7:1317-1324. [PMID: 27570883 DOI: 10.1021/acschemneuro.6b00157] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Myelination is governed by neuron-glia communication, which in turn is modulated by neural activity. The exact mechanisms remain elusive. We developed a novel in vitro optogenetic stimulation platform that facilitates subcellular activity induction in hundreds of neurons simultaneously. The light isolation was achieved by creating a biocompatible, light-absorbent, black microfluidic device integrated with a programmable, high-power LED array. The system was applied to a compartmentalized culture of primary neurons whose distal axons were interacting with oligodendrocyte precursor cells. Neural activity was induced along whole neurons or was constrained to cell bodies with proximal axons or distal axons only. All three modes of stimulation promoted oligodendrocyte differentiation and the myelination of axons as evidenced by a decrease in the number of oligodendrocyte precursor cells followed by increases in the number of mature oligodendrocytes and myelin sheath fragments. These results demonstrated the potential of our novel optogenetic stimulation system for the global and focal induction of neural activity in vitro for studying axon myelination.
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Affiliation(s)
- Hae Ung Lee
- Singapore
Institute for Neurotechnology, National University of Singapore, Singapore 119077
| | - Sudip Nag
- Singapore
Institute for Neurotechnology, National University of Singapore, Singapore 119077
| | - Agata Blasiak
- Singapore
Institute for Neurotechnology, National University of Singapore, Singapore 119077
| | - Yan Jin
- Singapore
Institute for Neurotechnology, National University of Singapore, Singapore 119077
| | - Nitish Thakor
- Singapore
Institute for Neurotechnology, National University of Singapore, Singapore 119077
- Department
of Biomedical Engineering, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - In Hong Yang
- Singapore
Institute for Neurotechnology, National University of Singapore, Singapore 119077
- Department
of Biomedical Engineering, School of Medicine, Johns Hopkins University, Baltimore, Maryland 21218, United States
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48
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Landowski LM, Dyck PJB, Engelstad J, Taylor BV. Axonopathy in peripheral neuropathies: Mechanisms and therapeutic approaches for regeneration. J Chem Neuroanat 2016; 76:19-27. [DOI: 10.1016/j.jchemneu.2016.04.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 03/18/2016] [Accepted: 04/30/2016] [Indexed: 01/01/2023]
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49
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Ai B, Bie Z, Zhang S, Li A. Paclitaxel targets VEGF-mediated angiogenesis in ovarian cancer treatment. Am J Cancer Res 2016; 6:1624-1635. [PMID: 27648354 PMCID: PMC5004068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 07/25/2016] [Indexed: 06/06/2023] Open
Abstract
Ovarian cancer is one of the gynecologic cancers with the highest mortality, wherein vascular endothelial growth factor (VEGF) is involved in regulating tumor vascularization, growth, migration, and invasion. VEGF-mediated angiogenesis in tumors has been targeted in various cancer treatments, and anti-VEGF therapy has been used clinically for treatment of several types of cancer. Paclitaxel is a natural antitumor agent in the standard front-line treatment that has significant efficiency to treat advanced cancers, including ovarian cancer. Although platinum/paclitaxel-based chemotherapy has good response rates, most patients eventually relapse because the disease develops drug resistance. We aim to review the recent advances in paclitaxel treatment of ovarian cancer via antiangiogenesis. Single-agent therapy may be used in selected cases of ovarian cancer. However, to prevent drug resistance, drug combinations should be identified for optimal effectiveness and existing therapies should be improved.
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Affiliation(s)
- Bin Ai
- Department of Medical Oncology, Beijing Hospital, National Center of GerontologyBeijing 100730, China
| | - Zhixin Bie
- Department of Medical Oncology, Beijing Hospital, National Center of GerontologyBeijing 100730, China
| | - Shuai Zhang
- Department of Medical Oncology, Beijing Hospital, National Center of GerontologyBeijing 100730, China
| | - Ailing Li
- Institute of Microcirculation, PUMC&CAMSBeijing 100005, China
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50
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Abstract
Diabetic neuropathy is a common secondary complication of diabetes that impacts on patient's health and well-being. Distal axon degeneration is a key feature of diabetic neuropathy, but the pathological changes which underlie axonal die-back are incompletely understood; despite decades of research a treatment has not yet been identified. Basic research must focus on understanding the complex mechanisms underlying changes that occur in the nervous system during diabetes. To this end, tissue culture techniques are invaluable as they enable researchers to examine the intricate mechanistic responses of cells to high glucose or other factors in order to better understand the pathogenesis of nerve dysfunction. This chapter describes the use of in vitro models to study a wide range of specific cellular effects pertaining to diabetic neuropathy including apoptosis, neurite outgrowth, neurodegeneration, activity, and bioenergetics. We consider problems associated with in vitro modeling and future refinement such as use of induced pluripotent stem cells and microfluidic technology.
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