1
|
Hucke A, Schröter R, Ceresa C, Chiorazzi A, Canta A, Semperboni S, Marmiroli P, Cavaletti G, Gess B, Ciarimboli G. Role of Mouse Organic Cation Transporter 2 for Nephro- and Peripheral Neurotoxicity Induced by Chemotherapeutic Treatment with Cisplatin. Int J Mol Sci 2023; 24:11486. [PMID: 37511245 PMCID: PMC10380567 DOI: 10.3390/ijms241411486] [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: 06/07/2023] [Revised: 07/06/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Cisplatin (CDDP) is an efficient chemotherapeutic agent broadly used to treat solid cancers. Chemotherapy with CDDP can cause significant unwanted side effects such as renal toxicity and peripheral neurotoxicity. CDDP is a substrate of organic cation transporters (OCT), transporters that are highly expressed in renal tissue. Therefore, CDDP uptake by OCT may play a role in causing unwanted toxicities of CDDP anticancer treatment. In this study, the contribution of the mouse OCT2 (mOCT2) to CDDP nephro- and peripheral neurotoxicity was investigated by comparing the effects of cyclic treatment with low doses of CDDP on renal and neurological functions in wild-type (WT) mice and mice with genetic deletion of OCT2 (OCT2-/- mice). This CDDP treatment protocol caused significant impairment of kidneys and peripherical neurological functions in WT mice. These effects were significantly reduced in OCT2-/- mice, however, less profoundly than what was previously measured in mice with genetic deletion of both OCT1 and 2 (OCT1-2-/- mice). Comparing the apparent affinities (IC50) of mOCT1 and mOCT2 for CDDP, the mOCT1 displayed a higher affinity for CDDP than the mOCT2 (IC50: 9 and 558 µM, respectively). Also, cellular toxicity induced by incubation with 100 µM CDDP was more pronounced in cells stably expressing mOCT1 than in cells expressing mOCT2. Therefore, in mice, CDDP uptake by both OCT1 and 2 contributes to the development of CDDP undesired side effects. OCT seem to be suitable targets for establishing treatment protocols aimed at decreasing unwanted CDDP toxicity and improving anticancer treatment with CDDP.
Collapse
Affiliation(s)
- Anna Hucke
- Experimentelle Nephrologie, Medizinische Klinik D, Universitätsklinikum Münster, 48149 Münster, Germany; (A.H.); (R.S.)
| | - Rita Schröter
- Experimentelle Nephrologie, Medizinische Klinik D, Universitätsklinikum Münster, 48149 Münster, Germany; (A.H.); (R.S.)
| | - Cecilia Ceresa
- Experimental Neurology Unit, Department of Medicine and Surgery, University of Milano Bicocca, 20900 Monza, Italy; (C.C.); (A.C.); (A.C.); (S.S.); (P.M.); (G.C.)
| | - Alessia Chiorazzi
- Experimental Neurology Unit, Department of Medicine and Surgery, University of Milano Bicocca, 20900 Monza, Italy; (C.C.); (A.C.); (A.C.); (S.S.); (P.M.); (G.C.)
| | - Annalisa Canta
- Experimental Neurology Unit, Department of Medicine and Surgery, University of Milano Bicocca, 20900 Monza, Italy; (C.C.); (A.C.); (A.C.); (S.S.); (P.M.); (G.C.)
| | - Sara Semperboni
- Experimental Neurology Unit, Department of Medicine and Surgery, University of Milano Bicocca, 20900 Monza, Italy; (C.C.); (A.C.); (A.C.); (S.S.); (P.M.); (G.C.)
| | - Paola Marmiroli
- Experimental Neurology Unit, Department of Medicine and Surgery, University of Milano Bicocca, 20900 Monza, Italy; (C.C.); (A.C.); (A.C.); (S.S.); (P.M.); (G.C.)
| | - Guido Cavaletti
- Experimental Neurology Unit, Department of Medicine and Surgery, University of Milano Bicocca, 20900 Monza, Italy; (C.C.); (A.C.); (A.C.); (S.S.); (P.M.); (G.C.)
- Fondazione IRCCS San Gerardo dei Tintori, 20900 Monza, Italy
| | - Burkhard Gess
- Department of Neurology, University Hospital Münster, 48149 Münster, Germany;
- Department of Neurology, Evangelisches Klinikum Bethel, University of Bielefeld, 33617 Bielefeld, Germany
| | - Giuliano Ciarimboli
- Experimentelle Nephrologie, Medizinische Klinik D, Universitätsklinikum Münster, 48149 Münster, Germany; (A.H.); (R.S.)
| |
Collapse
|
2
|
Oshina M, Kawamura N, Hara N, Higashikawa A, Ono T, Takeshita Y, Azuma S, Fukushima M, Iwai H, Kaneko T, Inanami H, Oshima Y. A Propensity Score-matched Analysis of Clinical Outcomes Between Single-level and Multilevel Intervertebral Decompression for Cervical Radiculopathy. Spine (Phila Pa 1976) 2023; 48:247-252. [PMID: 36255352 PMCID: PMC9855740 DOI: 10.1097/brs.0000000000004508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/30/2022] [Accepted: 10/04/2022] [Indexed: 01/25/2023]
Abstract
STUDY DESIGN Retrospective multicenter study with propensity score matching. OBJECTIVE To compare the clinical outcomes of single-level and multilevel intervertebral decompression for cervical degenerative radiculopathy. SUMMARY OF BACKGROUND DATA In patients with cervical radiculopathy, physical examination findings are sometimes inconsistent with imaging data. Multilevel decompression may be necessary for multiple foraminal stenosis. Additional decompression is more invasive yet expected to comprehensively decompress all suspected nerve root compression areas. However, the surgical outcomes of this approach compared with that of single-level decompression remain unknown. MATERIALS AND METHODS The data of patients with spinal surgery for pure cervical radiculopathy were collected. Patients were categorized into the single-level (SLDG) or multilevel (MLDG) intervertebral decompression group at C3/C4/C5/C6/C7/T1. Demographic data and patient-reported outcome scores, including the Neck Disability Index (NDI) and Numerical Rating Scale (NRS) scores for pain and numbness in the neck, upper back, and arms, were collected. The NDI improvement rates and changes in NRS scores were analyzed one year postoperatively at patient-reported outcome evaluation. Propensity score matching was performed to compare both groups after adjusting for baseline characteristics, including the preoperative NDI and NRS scores. RESULTS Among the 357 patients in this study, SLDG and MLDG comprised 231 and 126 patients, respectively. Two groups (n=112, each) were created by propensity score matching. Compared with the MLDG, the SLDG had a higher postoperative NDI improvement rate ( P =0.029) and lower postoperative arm numbness NRS score ( P =0.037). Other outcomes tended to be more favorable in the SLDG than in the MLDG, yet no statistical significance was detected. CONCLUSIONS In patients with cervical radiculopathy, the surgical outcomes of the SLDG showed better improvement in clinical outcomes than those of the MLDG. Numbness remained on the distal (arms) rather than the central (neck and upper back) areas in patients receiving multilevel decompression.
Collapse
Affiliation(s)
- Masahito Oshina
- Department of Orthopedic Surgery, NTT Medical Center Tokyo, Tokyo, Japan
| | - Naohiro Kawamura
- Department of Spine and Orthopedic Surgery, Japanese Red Cross Medical Center, Tokyo, Japan
| | - Nobuhiro Hara
- Department of Orthopedic Surgery, Japanese Red Cross Musashino Hospital, Tokyo, Japan
| | - Akiro Higashikawa
- Department of Orthopedic Surgery, Japan Organization of Occupational Health and Safety Kanto Rosai Hospital, Kanagawa, Japan
| | - Takashi Ono
- Department of Spinal Surgery, Japan Community Health-Care Organization Tokyo Shinjuku Medical Center, Tokyo, Japan
| | - Yujiro Takeshita
- Department of Orthopedic Surgery, Japan Organization of Occupational Health and Safety Yokohama Rosai Hospital, Kanagawa, Japan
| | - Seiichi Azuma
- Department of Orthopedic Surgery, Saitama Red Cross Hospital, Saitama, Japan
| | | | - Hiroki Iwai
- Iwai Orthopedic Medical Hospital, Tokyo, Japan
| | | | | | - Yasushi Oshima
- Department of Orthopaedic Surgery, the University of Tokyo, Tokyo, Japan
| |
Collapse
|
3
|
Morpho-Functional Characterisation of the Rat Ventral Caudal Nerve in a Model of Axonal Peripheral Neuropathy. Int J Mol Sci 2023; 24:ijms24021687. [PMID: 36675203 PMCID: PMC9863172 DOI: 10.3390/ijms24021687] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/30/2022] [Accepted: 01/10/2023] [Indexed: 01/18/2023] Open
Abstract
Peripheral Neuropathies (PN) are common conditions whose treatment is still lacking in most cases. Animal models are crucial, but experimental procedures should be refined in some cases. We performed a detailed characterization of the ventral caudal nerve to contribute to a more effective assessment of axonal damage in future PN studies. PN was induced via weekly systemic injection of a neurotoxic drug (paclitaxel); we compared the control and PN-affected rats, performing serial neurophysiological evaluations of the caudal nerve for its entire length. On the same nerve portions, we performed light microscopy and ultrastructural pathological observations to assess the severity of damage and verify the integrity of the surrounding structures. Neurophysiological and morphological analyses confirmed that a severe axonopathy had ensued in the PN group, with a length-dependent modality, matching morphological observations. The site of neurophysiological recording (e.g., distance from the base of the tail) was critical for achieving useful data. A flexible experimental paradigm should be considered in animal studies investigating axonal PN, particularly if the expected severity is relevant; the mid-portion of the tail might be the most appropriate site: there damage might be remarkable but neither as extreme as at the tip of the tail nor as mild as at the base of the tail.
Collapse
|
4
|
Metea M, Palmero-Soler E, Crum L. Preclinical nerve conduction: Nerve battery options for primate studies. J Pharmacol Toxicol Methods 2022; 116:107187. [PMID: 35636693 DOI: 10.1016/j.vascn.2022.107187] [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: 03/06/2022] [Revised: 04/23/2022] [Accepted: 05/24/2022] [Indexed: 10/18/2022]
Abstract
Electrophysiological neurodiagnostic tests of nerve conduction (NC) are key assays included in preclinical safety and toxicology programs to assess the peripheral neuropathy (PN) liability of a new drug. Despite their increased use, standardization of nerve conduction studies (NCS) is lacking in the preclinical space, with limited regulatory guidelines stipulating type and number of nerves or minimum combinations appropriate for each stage of drug development or indication. Detection of subtle peripheral toxicities depends on choosing appropriate nerve targets for testing, especially when functional changes remain above the lower limit of normal values. To support robust preclinical toxicology study designs, the current short communication provides options and recommendations for selecting peripheral nerves for clinically translatable nerve conduction batteries applicable to toxicology and gene therapy, with a focus on clinically translatable primate models. A comprehensive compilation of accessible nerve locations is offered including lower and upper extremity motor nerves, and sensory nerves with origin at multiple DRG levels. Rankings of technique difficulty and repeatability across serial collections are presented for each assay informed by serial nerve conduction from 500 adult primates. The goal of this communication is to support the standardization and preclinical implementation of this important assay.
Collapse
Affiliation(s)
- Monica Metea
- Preclinical Electrophysiology Consulting, LLC, Mattapoisett, MA, USA.
| | | | - Lucas Crum
- Preclinical Electrophysiology Consulting, LLC, Mattapoisett, MA, USA
| |
Collapse
|
5
|
Jung GL, McDaniel KL, LoPachin RM, Geohagen BC, Smith A, Huffstickler M, Herr DW. IN VIVO NEUROPHYSIOLOGICAL ASSESSMENT OF IN SILICO PREDICTIONS OF NEUROTOXICITY: CITRONELLAL, 3,4-DICHLORO-1-BUTENE, AND BENZYL BROMOACETATE. Neurotoxicology 2022; 90:48-61. [PMID: 35227730 PMCID: PMC9133174 DOI: 10.1016/j.neuro.2022.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 02/02/2022] [Accepted: 02/21/2022] [Indexed: 11/29/2022]
Abstract
Neurotoxicants may be widespread in the environment and can produce serious health impacts in the human population. Screening programs that use in vitro methods have generated data for thousands of chemicals. However, these methods often do not evaluate repeated or prolonged exposures, which are required for many neurotoxic outcomes. Additionally, the data produced by such screening methods may not include mechanisms which play critical biological roles necessary for in vivo neurotoxicity. The Hard and Soft Acids and Bases (HSAB) in silico model focuses on chemical structure and electrophilic properties which are important to the formation of protein adducts. A group of structurally diverse chemicals have been evaluated with an in silico screening approach incorporating HSAB parameters. However, the predictions from the expanded chemical space have not been evaluated using in vivo methods. Three chemicals predicted to be cumulative toxicants were selected for in vivo neurotoxicological testing. Adult male Long-Evans rats were treated orally with citronellal (CIT), 3,4-dichloro-1-butene (DCB), or benzyl bromoacetate (BBA) for 8 weeks. Behavioral observations were recorded weekly to assess motor function. Peripheral neurophysiological measurements were derived from nerve excitability (NE) tests which involved compound muscle action potentials (CMAPs) in the tail and foot, and mixed nerve action potentials (MNAPs) in the tail. Compound nerve action potentials (CNAPs) and nerve conduction velocity (NCV) in the tail were also quantified. Peripheral inputs into the central nervous system were examined using somatosensory evoked potentials recorded from the cortex (SEPCTX) and cerebellum (SEPCEREB). CIT or BBA did not result in significant alterations to peripheral nerve or somatosensory function. DCB reduced grip-strength and altered peripheral nerve function. The MNAPs required less current to reach 50% amplitude and had a lower calculated rheobase, suggesting increased excitability. Increased CNAP amplitudes and greater NCV were also observed. Novel changes were found in the SEPCTX with an abnormal peak forming in the early portion of the waveforms of treated rats, and decreased latencies and increased amplitudes were observed in SEPCEREB recordings. These data contribute to testing an expanded chemical space from an in silico HSAB model for predicting cumulative neurotoxicity and may assist with prioritizing chemicals to protect human health.
Collapse
Affiliation(s)
- Garyn L Jung
- Center for Public Health and Environmental Assessment, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
| | - Katherine L McDaniel
- Center for Public Health and Environmental Assessment, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
| | - Richard M LoPachin
- Professor Emeritus in the Department of Anesthesiology, Albert Einstein College of Medicine, 111 E. 210th St, Bronx, NY 10467, USA.
| | - Brian C Geohagen
- Department of Anesthesiology, Montefiore Medical Center, Albert Einstein College of Medicine, 111 E. 210th St, Bronx, NY 10467, USA.
| | - Alicia Smith
- Oak Ridge Institute for Science Education, Oak Ridge, Tennessee 37830, USA.
| | | | - David W Herr
- Center for Public Health and Environmental Assessment, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
| |
Collapse
|
6
|
OUP accepted manuscript. Toxicol Sci 2022; 186:298-308. [DOI: 10.1093/toxsci/kfac009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
7
|
Savaş K, Uysal H, Yaraş N. Comparison of nerve conduction velocity distribution methods by cold exposure and ischemia. Int J Neurosci 2020; 132:13-22. [PMID: 32672478 DOI: 10.1080/00207454.2020.1796663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE Non-invasive estimation of the conduction velocity distribution (CVD) of a peripheral nerve has the potential to both improve clinical diagnoses of pathology and to observe the progress of the disease or the efficacy of treatments. Comparisons were made of the performance of three non-invasive CVD estimation methods proposed by independent research groups on peripheral nerve bundles under different conditions. METHODS The first method (Cummins) uses a nerve compound action potential (CAP) with temporal dispersion and a mathematical single fiber action potential (SFAP). The second method (Barker) uses two CAPs and a non-mathematical SFAP waveform. The third method (Hirose) uses two CAPs recorded from distal and proximal sites. The Cummins and Barker methods have iterative solutions in the time domain while the Hirose method is a deconvolution estimator in the frequency domain. In order to compare these methods, we used cold exposure to affect primarily motor fibers and ischemia to affect primarily sensory fibers on rat caudal nerve bundles. RESULTS The Cummins method is sensitive to changes in motor and sensory fiber percentages in CVD if it is used with the volume conductor model. The Barker and Hirose methods are sensitive to motor fiber percentages in CVD but they cannot detect changes in sensory fiber percentages accurately. CONCLUSIONS Estimation of the CVD using a priori SFAP created with a volume conductor model can non-invasively supply accurate and precise information about fiber groups in a peripheral nerve bundle.
Collapse
Affiliation(s)
- Kamil Savaş
- Medical Faculty, Department of Biophysics, Akdeniz University, Antalya, Turkey
| | - Hilmi Uysal
- Medical Faculty, Department of Neurology, Akdeniz University, Antalya, Turkey
| | - Nazmi Yaraş
- Medical Faculty, Department of Biophysics, Akdeniz University, Antalya, Turkey
| |
Collapse
|
8
|
Bolon B, Krinke GJ, Pardo ID. Essential References for Structural Analysis of the Peripheral Nervous System for Pathologists and Toxicologists. Toxicol Pathol 2019; 48:87-95. [DOI: 10.1177/0192623319868160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Toxicologic neuropathology for the peripheral nervous system (PNS) is a vital but often underappreciated element of basic translational research and safety assessment. Evaluation of the PNS may be complicated by unfamiliarity with normal nerve and ganglion biology, which differs to some degree among species; the presence of confounding artifacts related to suboptimal sampling and processing; and limited experience with differentiating such artifacts from genuine disease manifestations and incidental background changes. This compilation of key PNS neurobiology, neuropathology, and neurotoxicology references is designed to allow pathologists and toxicologists to readily access essential information that is needed to enhance their proficiency in evaluating and interpreting toxic changes in PNS tissues from many species.
Collapse
|
9
|
Abstract
Many preclinical investigations limit the evaluation of the peripheral nervous system (PNS) to paraffin-embedded sections/hematoxylin and eosin–stained sections of the sciatic nerve. This limitation ignores several key mechanisms of toxicity and anatomic differences that may interfere with an accurate assessment of test article effects on the neurons/neurites peripheral to the brain and spinal cord. Ganglion neurons may be exposed to higher concentrations of the test article as compared to neurons in the brain or spinal cord due to differences in capillary permeability. Many peripheral neuropathies are length-dependent, meaning distal nerves may show morphological changes before they are evident in the mid-sciatic nerve. Paraffin-embedded nerves are not optimal to assess myelin changes, notably those leading to demyelination. Differentiating between axonal or myelin degeneration may not be possible from the examination of paraffin-embedded sections. A sampling strategy more consistent with known mechanisms of toxicity, atraumatic harvest of tissues, optimized fixation, and the use of resin and paraffin-embedded sections will greatly enhance the pathologist’s ability to observe and characterize effects in the PNS.
Collapse
|
10
|
Bolon B, Krinke G, Butt MT, Rao DB, Pardo ID, Jortner BS, Garman RH, Jensen K, Andrews-Jones L, Morrison JP, Sharma AK, Thibodeau MS. STP Position Paper: Recommended Best Practices for Sampling, Processing, and Analysis of the Peripheral Nervous System (Nerves and Somatic and Autonomic Ganglia) during Nonclinical Toxicity Studies. Toxicol Pathol 2018; 46:372-402. [DOI: 10.1177/0192623318772484] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Peripheral nervous system (PNS) toxicity is surveyed inconsistently in nonclinical general toxicity studies. These Society of Toxicologic Pathology “best practice” recommendations are designed to ensure consistent, efficient, and effective sampling, processing, and evaluation of PNS tissues for four different situations encountered during nonclinical general toxicity (screening) and dedicated neurotoxicity studies. For toxicity studies where neurotoxicity is unknown or not anticipated (situation 1), PNS evaluation may be limited to one sensorimotor spinal nerve. If somatic PNS neurotoxicity is suspected (situation 2), analysis minimally should include three spinal nerves, multiple dorsal root ganglia, and a trigeminal ganglion. If autonomic PNS neuropathy is suspected (situation 3), parasympathetic and sympathetic ganglia should be assessed. For dedicated neurotoxicity studies where a neurotoxic effect is expected (situation 4), PNS sampling follows the strategy for situations 2 and/or 3, as dictated by functional or other compound/target-specific data. For all situations, bilateral sampling with unilateral processing is acceptable. For situations 1–3, PNS is processed conventionally (immersion in buffered formalin, paraffin embedding, and hematoxylin and eosin staining). For situation 4 (and situations 2 and 3 if resources and timing permit), perfusion fixation with methanol-free fixative is recommended. Where PNS neurotoxicity is suspected or likely, at least one (situations 2 and 3) or two (situation 4) nerve cross sections should be postfixed with glutaraldehyde and osmium before hard plastic resin embedding; soft plastic embedding is not a suitable substitute for hard plastic. Special methods may be used if warranted to further characterize PNS findings. Initial PNS analysis should be informed, not masked (“blinded”). Institutions may adapt these recommendations to fit their specific programmatic requirements but may need to explain in project documentation the rationale for their chosen PNS sampling, processing, and evaluation strategy.
Collapse
Affiliation(s)
| | | | - Mark T. Butt
- Tox Path Specialists, LLC, Frederick, Maryland, USA
| | - Deepa B. Rao
- US Food and Drug Administration, Center for Drug Evaluation and Research, Silver Spring, Maryland, USA
| | | | - Bernard S. Jortner
- Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Robert H. Garman
- Consultants in Veterinary Pathology, Inc., Murrysville, Pennsylvania, USA
| | - Karl Jensen
- US Environmental Protection Agency, Research Triangle Park, North Carolina, USA
| | | | | | | | | |
Collapse
|
11
|
Mohd Isa IL, Abbah SA, Kilcoyne M, Sakai D, Dockery P, Finn DP, Pandit A. Implantation of hyaluronic acid hydrogel prevents the pain phenotype in a rat model of intervertebral disc injury. SCIENCE ADVANCES 2018; 4:eaaq0597. [PMID: 29632893 PMCID: PMC5884685 DOI: 10.1126/sciadv.aaq0597] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 02/15/2018] [Indexed: 05/13/2023]
Abstract
Painful intervertebral disc degeneration is mediated by inflammation that modulates glycosylation and induces hyperinnervation and sensory sensitization, which result in discogenic pain. Hyaluronic acid (HA) used as a therapeutic biomaterial can reduce inflammation and pain, but the effects of HA therapy on glycosylation and pain associated with disc degeneration have not been previously determined. We describe a novel rat model of pain induced by intervertebral disc injury, with validation of the pain phenotype by morphine treatment. Using this model, we assessed the efficacy of HA hydrogel for the alleviation of pain, demonstrating that it reduced nociceptive behavior, an effect associated with down-regulation of nociception markers and inhibition of hyperinnervation. Furthermore, HA hydrogel altered glycosylation and modulated key inflammatory and regulatory signaling pathways, resulting in attenuation of inflammation and regulation of matrix components. Our results suggest that HA hydrogel is a promising clinical candidate for the treatment of back pain caused by degenerated discs.
Collapse
Affiliation(s)
- Isma Liza Mohd Isa
- Centre for Research in Medical Devices, National University of Ireland, Galway, Ireland
- Department of Anatomy, National University of Ireland, Galway, Ireland
| | - Sunny A. Abbah
- Centre for Research in Medical Devices, National University of Ireland, Galway, Ireland
| | - Michelle Kilcoyne
- Centre for Research in Medical Devices, National University of Ireland, Galway, Ireland
- Carbohydrate Signalling Group, Discipline of Microbiology, National University of Ireland, Galway, Ireland
| | - Daisuke Sakai
- Department of Orthopedic Surgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Peter Dockery
- Centre for Research in Medical Devices, National University of Ireland, Galway, Ireland
- Department of Anatomy, National University of Ireland, Galway, Ireland
- Centre for Microscopy and Imaging, National University of Ireland, Galway, Ireland
| | - David P. Finn
- Centre for Research in Medical Devices, National University of Ireland, Galway, Ireland
- Department of Pharmacology and Therapeutics, Galway Neuroscience Centre and Centre for Pain Research, National University of Ireland, Galway, Ireland
| | - Abhay Pandit
- Centre for Research in Medical Devices, National University of Ireland, Galway, Ireland
- Corresponding author.
| |
Collapse
|
12
|
Arnold R, Moldovan M, Rosberg MR, Krishnan AV, Morris R, Krarup C. Nerve excitability in the rat forelimb: a technique to improve translational utility. J Neurosci Methods 2017; 275:19-24. [DOI: 10.1016/j.jneumeth.2016.10.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/01/2016] [Accepted: 10/18/2016] [Indexed: 01/09/2023]
|
13
|
Authier S, Arezzo J, Delatte MS, Kallman MJ, Markgraf C, Paquette D, Pugsley MK, Ratcliffe S, Redfern WS, Stevens J, Valentin JP, Vargas HM, Curtis MJ. Safety pharmacology investigations on the nervous system: An industry survey. J Pharmacol Toxicol Methods 2016; 81:37-46. [PMID: 27263834 DOI: 10.1016/j.vascn.2016.06.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Revised: 01/13/2016] [Accepted: 06/01/2016] [Indexed: 11/29/2022]
Abstract
The Safety Pharmacology Society (SPS) conducted an industry survey in 2015 to identify industry practices as they relate to central, peripheral and autonomic nervous system ('CNS') drug safety testing. One hundred fifty-eight (158) participants from Asia (16%), Europe (20%) and North America (56%) responded to the survey. 52% of participants were from pharmaceutical companies (>1000 employees). Oncology (67%) and neurology/psychiatry (66%) were the most frequent target indications pursued by companies followed by inflammation (48%), cardiovascular (43%), metabolic (39%), infectious (37%), orphan (32%) and respiratory (29%) diseases. Seizures (67% of participants), gait abnormalities (67%), tremors (65%), emesis (56%), sedation (52%) and salivation (47%) were the most commonly encountered CNS issues in pre-clinical drug development while headache (65%), emesis/nausea (60%), fatigue (51%) and dizziness (49%) were the most frequent issues encountered in Phase I clinical trials. 54% of respondents reported that a standard battery of tests applied to screen drug candidates was the approach most commonly used to address non-clinical CNS safety testing. A minority (14% of all participants) reported using electroencephalography (EEG) screening prior to animal inclusion on toxicology studies. The most frequent group size was n=8 for functional observation battery (FOB), polysomnography and seizure liability studies. FOB evaluations were conducted in a dedicated room (78%) by blinded personnel (66%) with control for circadian cycle (55%) effects (e.g., dosing at a standardized time; balancing time of day across treatment groups). The rat was reported as the most common species used for seizure liability, nerve conduction and drug-abuse liability testing.
Collapse
Affiliation(s)
- Simon Authier
- CiToxLAB North America, 445 Armand Frappier, Laval, QC H7V 4B3, Canada.
| | - Joseph Arezzo
- Department of Neuroscience, Albert Einstein College of Medicine, USA; Department of Neurology, Albert Einstein College of Medicine, USA
| | - Marcus S Delatte
- Division of Anesthesia, Analgesia and Addiction Products (DAAAP), CDER, U.S. Food & Drug Administration, Silver Spring, MD, USA
| | | | - Carrie Markgraf
- Discovery Sciences Support, Merck Research Laboratories, 2015 Galloping Hill Road, Kenilworth, NJ 07033, USA
| | | | - Michael K Pugsley
- Department of Toxicology, Purdue Pharma L.P., Cranbury, NJ 08512, USA
| | - Sian Ratcliffe
- Safety Pharmacology COE, Pfizer, United States, Groton, CT 06340, USA
| | - William S Redfern
- Drug Safety & Metabolism, AstraZeneca, 310 Cambridge Science Park, Cambridge CB4 0WG, UK
| | - Joanne Stevens
- Department of Pharmacology, Merck Research Laboratories, West Point, PA 19486, USA
| | | | - Hugo M Vargas
- Integrated Discovery and Safety Pharmacology, Amgen, Inc., Thousand Oaks, CA, USA
| | - Michael J Curtis
- Cardiovascular Division, Faculty of Life Sciences & Medicine, King's College London, Rayne Institute, St Thomas' Hospital, London, SE17EH, UK
| |
Collapse
|
14
|
MacKenzie SJ, Yi JL, Singla A, Russell TM, Calancie B. Innervation and function of rat tail muscles for modeling cauda equina injury and repair. Muscle Nerve 2015; 52:94-102. [PMID: 25346299 DOI: 10.1002/mus.24498] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 09/26/2014] [Accepted: 10/17/2014] [Indexed: 12/23/2022]
Abstract
INTRODUCTION The rat tail exhibits functional impairment after cauda equina injury. Our goal was to better understand the innervation and roles of muscles that control the tail. METHODS Adult rats received either: (1) ventral root injury; (2) caudales nerve injury; or (3) mapping of sacrococcygeal myotomes. Activation of small muscles within the tail itself (intrinsics) was compared with that of larger lumbosacral muscles acting on the tail (extrinsics). Behavioral testing of tail movement was done 1 week later. RESULTS Rats that received ventral root injury exhibited multiple behavioral deficits, whereas rats with injury to caudales nerves maintained more fully preserved tail movement. Mapping studies revealed much broader overlap of myotomes for extrinsic muscles. CONCLUSIONS Extrinsic tail muscles play a greater role in tail movement in the rat than their intrinsic counterparts and are innervated by multiple neurological segments. These findings have major implications for future research on cauda equina injury.
Collapse
Affiliation(s)
- Samuel J MacKenzie
- Department of Neuroscience, Upstate Medical University, Syracuse, New York, USA
| | - Juneyoung L Yi
- Department of Neurosurgery, Institute for Human Performance, Upstate Medical University, 750 East Adams Street, Syracuse, New York, 13210, USA
| | - Amit Singla
- Department of Neurosurgery, Institute for Human Performance, Upstate Medical University, 750 East Adams Street, Syracuse, New York, 13210, USA
| | - Thomas M Russell
- Department of Neuroscience, Upstate Medical University, Syracuse, New York, USA
| | - Blair Calancie
- Department of Neurosurgery, Institute for Human Performance, Upstate Medical University, 750 East Adams Street, Syracuse, New York, 13210, USA
| |
Collapse
|
15
|
Reichert P, Kiełbowicz Z, DziĘgiel P, Puła B, Kuryszko J, Gosk J, Bocheńska A. The Rabbit Brachial Plexus as a Model for Nerve Repair Surgery-Histomorphometric Analysis. Anat Rec (Hoboken) 2014; 298:444-54. [DOI: 10.1002/ar.23058] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 06/26/2014] [Accepted: 08/04/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Paweł Reichert
- Department of Traumatology; Clinic of Traumatology and Hand Surgery, Wroclaw Medical University; ul. Borowska 213 50-556 Wrocław Poland
| | - Zdzisław Kiełbowicz
- Department of Surgery; the Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences; pl. Grunwaldzki 51 50-366 Wrocław Poland
| | - Piotr DziĘgiel
- Department of Histology and Embryology; Wroclaw Medical University; ul. Chałubińskiego 6a 50-368 Wrocław Poland
| | - Bartosz Puła
- Department of Histology and Embryology; Wroclaw Medical University; ul. Chałubińskiego 6a 50-368 Wrocław Poland
| | - Jan Kuryszko
- Department of Animal Physiology and Biostructure; Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences; ul. Norwida 31 50-373 Wroclaw Poland
| | - Jerzy Gosk
- Department of Traumatology; Clinic of Traumatology and Hand Surgery, Wroclaw Medical University; ul. Borowska 213 50-556 Wrocław Poland
| | - Aneta Bocheńska
- Department of Internal Medicine; Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn; ul. Oczapowskiego 14 10-718 Olsztyn Poland
| |
Collapse
|
16
|
Boehmerle W, Huehnchen P, Peruzzaro S, Balkaya M, Endres M. Electrophysiological, behavioral and histological characterization of paclitaxel, cisplatin, vincristine and bortezomib-induced neuropathy in C57Bl/6 mice. Sci Rep 2014; 4:6370. [PMID: 25231679 PMCID: PMC5377307 DOI: 10.1038/srep06370] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 08/26/2014] [Indexed: 01/12/2023] Open
Abstract
Polyneuropathy is a frequent and potentially severe side effect of clinical tumor chemotherapy. The goal of this study was to characterize paclitaxel-, cisplatin-, vincristine- and bortezomib-induced neuropathy in C57BL/6 mice with a comparative approach. The phenotype of the animals was evaluated at four time points with behavioral and electrophysiological tests, followed by histology. Treatment protocols used in this study were well tolerated and induced a sensory and predominantly axonal polyneuropathy. Behavioral testing revealed normal motor coordination, whereas all mice receiving verum treatment developed mechanical allodynia and distinct gait alterations. Electrophysiological evaluation showed a significant decrease of the caudal sensory nerve action potential amplitude for all cytostatic agents and a moderate reduction of nerve conduction velocity for cisplatin and paclitaxel. This finding was confirmed by histological analysis of the sciatic nerve which showed predominantly axonal damage: Paclitaxel and vincristine affected mostly large myelinated fibers, bortezomib small myelinated fibers and cisplatin damaged all types of myelinated fibers to a similar degree. Neuropathic symptoms developed faster in paclitaxel and vincristine treated animals compared to cisplatin and bortezomib treatment. The animal models in this study can be used to elucidate pathomechanisms underlying chemotherapy-induced polyneuropathy and for the development of novel therapeutic and preventative strategies.
Collapse
Affiliation(s)
- Wolfgang Boehmerle
- 1] Klinik und Hochschulambulanz für Neurologie, Charité Universitätsmedizin Berlin, Berlin, Germany [2] Cluster of Excellence NeuroCure, Charité Universitätsmedizin Berlin, Berlin, Germany [3]
| | - Petra Huehnchen
- 1] Klinik und Hochschulambulanz für Neurologie, Charité Universitätsmedizin Berlin, Berlin, Germany [2] Cluster of Excellence NeuroCure, Charité Universitätsmedizin Berlin, Berlin, Germany [3]
| | - Sarah Peruzzaro
- Klinik und Hochschulambulanz für Neurologie, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Mustafa Balkaya
- 1] Klinik und Hochschulambulanz für Neurologie, Charité Universitätsmedizin Berlin, Berlin, Germany [2] Center for Stroke Research Berlin, Charité Universitätsmedizin Berlin, Berlin, Germany [3] Neurovascular research laboratory, Department of Radiology, Massachusetts general hospital and Harvard medical school, Boston, MA, USA
| | - Matthias Endres
- 1] Klinik und Hochschulambulanz für Neurologie, Charité Universitätsmedizin Berlin, Berlin, Germany [2] Cluster of Excellence NeuroCure, Charité Universitätsmedizin Berlin, Berlin, Germany [3] Center for Stroke Research Berlin, Charité Universitätsmedizin Berlin, Berlin, Germany [4] German Center for Neurodegenerative Diseases (DZNE), Berlin, Germany
| |
Collapse
|
17
|
Lirk P, Verhamme C, Boeckh R, Stevens MF, ten Hoope W, Gerner P, Blumenthal S, de Girolami U, van Schaik IN, Hollmann MW, Picardi S. Effects of early and late diabetic neuropathy on sciatic nerve block duration and neurotoxicity in Zucker diabetic fatty rats. Br J Anaesth 2014; 114:319-26. [PMID: 25145353 DOI: 10.1093/bja/aeu270] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND The neuropathy of type II diabetes mellitus (DM) is increasing in prevalence worldwide. We aimed to test the hypothesis that in a rodent model of type II DM, neuropathy would lead to increased neurotoxicity and block duration after lidocaine-induced sciatic nerve block when compared with control animals. METHODS Experiments were carried out in Zucker diabetic fatty rats aged 10 weeks (early diabetic) or 18 weeks (late diabetic, with or without insulin 3 units per day), and age-matched healthy controls. Left sciatic nerve block was performed using 0.2 ml lidocaine 2%. Nerve conduction velocity (NCV) and F-wave latency were used to quantify nerve function before, and 1 week after nerve block, after which sciatic nerves were used for neurohistopathology. RESULTS Early diabetic animals did not show increased signs of nerve dysfunction after nerve block. In late diabetic animals without insulin vs control animals, NCV was 34.8 (5.0) vs 41.1 (4.1) ms s(-1) (P<0.01), and F-wave latency was 7.7 (0.5) vs 7.0 (0.2) ms (P<0.01), respectively. Motor nerve block duration was prolonged in late diabetic animals, but neurotoxicity was not. Late diabetic animals receiving insulin showed intermediate results. CONCLUSIONS In a rodent type II DM model, nerves have increased sensitivity for short-acting local anaesthetics without adjuvants in vivo, as evidenced by prolonged block duration. This sensitivity appears to increase with the progression of neuropathy. Our results do not support the hypothesis that neuropathy due to type II DM increases the risk of nerve injury after nerve block.
Collapse
Affiliation(s)
- P Lirk
- Department of Anaesthesiology and Laboratory of Experimental Anaesthesiology and Intensive Care (LEICA), University of Amsterdam, Amsterdam, The Netherlands
| | - C Verhamme
- Department of Neurology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - R Boeckh
- Department of Anesthesiology, University of Heidelberg, Heidelberg, Germany
| | - M F Stevens
- Department of Anaesthesiology and Laboratory of Experimental Anaesthesiology and Intensive Care (LEICA), University of Amsterdam, Amsterdam, The Netherlands
| | - W ten Hoope
- Department of Anaesthesiology and Laboratory of Experimental Anaesthesiology and Intensive Care (LEICA), University of Amsterdam, Amsterdam, The Netherlands
| | - P Gerner
- Department of Anesthesiology, Perioperative and Critical Care Medicine, Paracelsus Medical University, Salzburg, Austria
| | - S Blumenthal
- Department of Anaesthesiology and Intensive Care Medicine, Triemli Hospital, Zurich, Switzerland
| | - U de Girolami
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - I N van Schaik
- Department of Neurology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - M W Hollmann
- Department of Anaesthesiology and Laboratory of Experimental Anaesthesiology and Intensive Care (LEICA), University of Amsterdam, Amsterdam, The Netherlands
| | - S Picardi
- Department of Anaesthesiology and Laboratory of Experimental Anaesthesiology and Intensive Care (LEICA), University of Amsterdam, Amsterdam, The Netherlands Department of Anesthesiology, University of Heidelberg, Heidelberg, Germany
| |
Collapse
|
18
|
The rabbit brachial plexus as an experimental model – anatomy and surgical approach. Pol J Vet Sci 2014; 17:339-45. [DOI: 10.2478/pjvs-2014-0046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AbstractThe aim of our study was to analyze the anatomy and surgical approach of the rabbit brachial plexus. The research included 18 rabbits. The rabbit seems to be a good experimental model for spinal nerves injury, especially for the C5 and C6 segments. The anatomical structure of the rabbit’s brachial plexus is similar to the human brachial plexus. The structure of the rabbit C5 and C6 segments is analogous to the human structure. The spinal nerves of the C5 and C6 segments in the rabbit are wide and long enough for microsurgical procedures
Collapse
|
19
|
Petit B, Giraudet F, Béchon C, Bardin L, Avan P, Boespflug-Tanguy O, Bégou M. Mice with a deletion of the major central myelin protein exhibit hypersensitivity to noxious thermal stimuli: involvement of central sensitization. Neurobiol Dis 2014; 65:55-68. [DOI: 10.1016/j.nbd.2014.01.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 12/10/2013] [Accepted: 01/04/2014] [Indexed: 01/10/2023] Open
|
20
|
Carozzi VA, Renn CL, Bardini M, Fazio G, Chiorazzi A, Meregalli C, Oggioni N, Shanks K, Quartu M, Serra MP, Sala B, Cavaletti G, Dorsey SG. Bortezomib-induced painful peripheral neuropathy: an electrophysiological, behavioral, morphological and mechanistic study in the mouse. PLoS One 2013; 8:e72995. [PMID: 24069168 PMCID: PMC3772181 DOI: 10.1371/journal.pone.0072995] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 07/23/2013] [Indexed: 11/18/2022] Open
Abstract
Bortezomib is the first proteasome inhibitor with significant antineoplastic activity for the treatment of relapsed/refractory multiple myeloma as well as other hematological and solid neoplasms. Peripheral neurological complications manifesting with paresthesias, burning sensations, dysesthesias, numbness, sensory loss, reduced proprioception and vibratory sensitivity are among the major limiting side effects associated with bortezomib therapy. Although bortezomib-induced painful peripheral neuropathy is clinically easy to diagnose and reliable models are available, its pathophysiology remains partly unclear. In this study we used well-characterized immune-competent and immune-compromised mouse models of bortezomib-induced painful peripheral neuropathy. To characterize the drug-induced pathological changes in the peripheral nervous system, we examined the involvement of spinal cord neuronal function in the development of neuropathic pain and investigated the relevance of the immune response in painful peripheral neuropathy induced by bortezomib. We found that bortezomib treatment induced morphological changes in the spinal cord, dorsal roots, dorsal root ganglia (DRG) and peripheral nerves. Neurophysiological abnormalities and specific functional alterations in Aδ and C fibers were also observed in peripheral nerve fibers. Mice developed mechanical allodynia and functional abnormalities of wide dynamic range neurons in the dorsal horn of spinal cord. Bortezomib induced increased expression of the neuronal stress marker activating transcription factor-3 in most DRG. Moreover, the immunodeficient animals treated with bortezomib developed a painful peripheral neuropathy with the same features observed in the immunocompetent mice. In conclusion, this study extends the knowledge of the sites of damage induced in the nervous system by bortezomib administration. Moreover, a selective functional vulnerability of peripheral nerve fiber subpopulations was found as well as a change in the electrical activity of wide dynamic range neurons of dorsal horn of spinal cord. Finally, the immune response is not a key factor in the development of morphological and functional damage induced by bortezomib in the peripheral nervous system.
Collapse
Affiliation(s)
- Valentina A. Carozzi
- Department of Surgery and Translational Medicine, University of Milan Bicocca, Monza, Italy
- * E-mail: (VAC)
| | - Cynthia L. Renn
- School of Nursing, Center for Pain Studies, University of Maryland, Baltimore, Maryland, United States of America
| | - Michela Bardini
- “M. Tettamanti” Research Center, Department of Health Sciences, University of Milan Bicocca, Monza, Italy
| | - Grazia Fazio
- “M. Tettamanti” Research Center, Department of Health Sciences, University of Milan Bicocca, Monza, Italy
| | - Alessia Chiorazzi
- Department of Surgery and Translational Medicine, University of Milan Bicocca, Monza, Italy
| | - Cristina Meregalli
- Department of Surgery and Translational Medicine, University of Milan Bicocca, Monza, Italy
| | - Norberto Oggioni
- Department of Surgery and Translational Medicine, University of Milan Bicocca, Monza, Italy
| | - Kathleen Shanks
- School of Nursing, Center for Pain Studies, University of Maryland, Baltimore, Maryland, United States of America
| | - Marina Quartu
- Department of Biomedical Sciences, Section of Cytomorphology, University of Cagliari, Monserrato, Italy
| | - Maria Pina Serra
- Department of Biomedical Sciences, Section of Cytomorphology, University of Cagliari, Monserrato, Italy
| | - Barbara Sala
- Department of Surgery and Translational Medicine, University of Milan Bicocca, Monza, Italy
| | - Guido Cavaletti
- Department of Surgery and Translational Medicine, University of Milan Bicocca, Monza, Italy
| | - Susan G. Dorsey
- School of Nursing, Center for Pain Studies, University of Maryland, Baltimore, Maryland, United States of America
| |
Collapse
|
21
|
Redfern WS, Ewart LC, Lainée P, Pinches M, Robinson S, Valentin JP. Functional assessments in repeat-dose toxicity studies: the art of the possible. Toxicol Res (Camb) 2013. [DOI: 10.1039/c3tx20093k] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
|
22
|
Zotova EG, Arezzo JC. NON-INVASIVE EVALUATION OF NERVE CONDUCTION IN SMALL DIAMETER FIBERS IN THE RAT. PHYSIOLOGY JOURNAL 2013; 2013:254789. [PMID: 23580940 PMCID: PMC3620683 DOI: 10.1155/2013/254789] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A novel non-invasive technique was applied to measure velocity within slow conducting axons in the distal extreme of the sciatic nerve (i.e., digital nerve) in a rat model. The technique is based on the extraction of rectified multiple unit activity (MUA) from in vivo whole nerve compound responses. This method reliably identifies compound action potentials in thinly myelinated fibers conducting at a range of 9-18 m/s (Aδ axons), as well as in a subgroup of unmylinated C fibers conducting at approximately 1-2 m/s. The sensitivity of the method to C-fiber conduction was confirmed by the progressive decrement of the responses in the 1-2 m/s range over a 20-day period following the topical application of capsaicin (ANOVA p<0.03). Increasing the frequency of applied repetitive stimulation over a range of 0.75 Hz to 6.0 Hz produced slowing of conduction and a significant decrease in the magnitude of the compound C-fiber response (ANOVA p<0.01). This technique offers a unique opportunity for the non-invasive, repeatable, and quantitative assessment of velocity in the subsets of Aδ and C fibers in parallel with evaluation of fast nerve conduction.
Collapse
Affiliation(s)
- Elena G. Zotova
- Department of Neurology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY, 10461, USA
| | - Joseph C. Arezzo
- Department of Neurology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY, 10461, USA
- Department of Neuroscience, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY, 10461, USA
| |
Collapse
|
23
|
Riva N, Domi T, Lopez ID, Triolo D, Fossaghi A, Dina G, Podini P, Comi G, Quattrini A. The brachial plexus branches to the pectoral muscles in adult rats: morphological aspects and morphometric normative data. Front Neuroanat 2012; 6:41. [PMID: 23087618 PMCID: PMC3467569 DOI: 10.3389/fnana.2012.00041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 09/20/2012] [Indexed: 12/13/2022] Open
Abstract
Animal models provide an important tool to investigate the pathogenesis of neuromuscular disorders. In the present study, we analyze fiber composition of the brachial plexus branches to the pectoral muscles: the medial anterior thoracic nerve (MATN) and the lateral anterior thoracic nerve (LATN). The morphological and morphometric characteristics and the percentage of motor fibers within each nerve are here reported, adding information to microscopic anatomy knowledge of the rat brachial plexus. As control, we employed the quadriceps nerve, commonly used for the evaluation of motor fibers at hindlimbs. We demonstrated that the MATN and the LATN are predominantly composed of large motor fibers and therefore could be employed to evaluate the peripheral nervous system (PNS) involvement at forelimbs in neurological diseases models, predominantly affecting the motor fiber compartment.
Collapse
Affiliation(s)
- Nilo Riva
- Neuropathology Unit, Division of Neuroscience and INSPE, San Raffaele Scientific Institute Milan, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Leandri M, Ghignotti M, Emionite L, Leandri S, Cilli M. Electrophysiological features of the mouse tail nerves and their changes in chemotherapy induced peripheral neuropathy (CIPN). J Neurosci Methods 2012; 209:403-9. [PMID: 22800858 DOI: 10.1016/j.jneumeth.2012.07.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 07/06/2012] [Accepted: 07/10/2012] [Indexed: 10/28/2022]
Abstract
Electrophysiology of tail nerves in rodents has been demonstrated a reliable method to investigate models of peripheral neuropathies. Nevertheless, data concerning mouse models are lacking. We assessed the normal features of sensory and motor conduction of tail nerves in adult mice. We found that, as in rats, a sensory compound action potential and motor responses could be recorded with the non invasive and highly reliable technique proposed, especially if bipolar derivations were used. We also investigated the changes related to chemotherapy induced peripheral neuropathy (CIPN) after paclitaxel treatment (times 1 and 2), compared to pre-treatment (time 0) and to controls. It was found that only the sensory compound action potential was involved in CIPN, with decrease in amplitude and conduction velocity, suggesting a significant reduction in number of fast conducting fibres and a correspondent increase in the number of slow conducting ones, although the total amount of active myelinated fibres was deemed to be unchanged through time 0, time 1 and time 2. The results obtained in CIPN provide new functional evidence about the involvement of sensory fibres and may help in better understanding the underlying mechanisms.
Collapse
Affiliation(s)
- Massimo Leandri
- Interuniversity Centre for Pain Neurophysiology, University of Genova, Via Dodecaneso 35, Genoa, Italy.
| | | | | | | | | |
Collapse
|
25
|
Kilic A, Konopka G, Akelina Y, Regalbuto R, Tang P. Ipsilateral, cabled sural nerve for a sciatic nerve defect: An experimental model in the rat. J Neurosci Methods 2011; 197:137-42. [DOI: 10.1016/j.jneumeth.2011.02.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 02/01/2011] [Accepted: 02/02/2011] [Indexed: 10/18/2022]
|
26
|
Arezzo JC, Litwak MS, Zotova EG. Correlation and dissociation of electrophysiology and histopathology in the assessment of toxic neuropathy. Toxicol Pathol 2010; 39:46-51. [PMID: 21119050 DOI: 10.1177/0192623310390231] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The evaluation of neurotoxic damage involves a unique set of challenges. Vulnerable structures, such as neocortex, hippocampus, spinal cord, and peripheral nerve are complex and sharply differentiated; deficits can result from insults to one or more element(s) in the system (e.g., myelin, axon, soma, synapse, or glia). In-life assessment of neurotoxic damage is complicated by the relative inaccessibility of structures in the brain and spinal cord, and recovery is severely limited. Histopathology and electrophysiology represent two of the most commonly used and valuable techniques in this field. This review outlines the strengths and limitations of these procedures and focuses on circumstances in which findings from these measures are dissociated. Electrophysiology is noninvasive and affords a longitudinal view of onset and progression of deficits; however, measures are generally weighted to large-diameter myelinated axons and to regions of primary sensory and motor processing. Histology is a highly validated biomarker, but it is restricted by sampling issues and is insensitive to some elements of neurotoxicity (e.g., altered channel function) associated with profound functional consequences. The central tenet of the discussion is that histology and electrophysiology offer complementary views of neurotoxic damage and, whenever possible, they should be used in concert.
Collapse
Affiliation(s)
- Joseph C Arezzo
- Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY10461, USA.
| | | | | |
Collapse
|
27
|
Carozzi VA, Canta A, Oggioni N, Sala B, Chiorazzi A, Meregalli C, Bossi M, Marmiroli P, Cavaletti G. Neurophysiological and neuropathological characterization of new murine models of chemotherapy-induced chronic peripheral neuropathies. Exp Neurol 2010; 226:301-9. [PMID: 20832406 DOI: 10.1016/j.expneurol.2010.09.004] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 08/31/2010] [Accepted: 09/01/2010] [Indexed: 12/30/2022]
Abstract
Cisplatin, paclitaxel and bortezomib belong to some of the most effective families of chemotherapy drugs for solid and haematological cancers. Epothilones represent a new family of very promising antitubulin agents. The clinical use of all these drugs is limited by their severe peripheral neurotoxicity. Several in vivo rat models have reproduced the characteristics of the peripheral neurotoxicity of these drugs. However, since only a very limited number of cancer types can be studied in immunocompetent rats, these animal models do not represent an effective way to evaluate, at the same time, the antineoplastic activity and the neurotoxic effects of the anticancer compounds. In this study, we characterized the neurophysiological impairment induced by chronic chemotherapy treatment in BALB/c mice, a strain suitable for assessing the activity of anticancer treatments. At the end of a 4-week period of treatment with cisplatin, paclitaxel, epothilone-B or bortezomib, sensory and sensory/motor nerve conduction velocities (NCV) were determined in the caudal and digital nerves and dorsal root ganglia (DRG) and sciatic nerves were collected for histopathological analysis. The electrophysiological studies revealed that all the compounds caused a statistically significant reduction in the caudal NCV, while impairment of the digital NCV was less severe. This functional damage was confirmed by the histopathological observations evidencing axonal degeneration in the sciatic nerve induced by all the drugs associated with pathological changes in DRG induced only by cisplatin and bortezomib. These results confirm the possibility to use our models to combine the study of the antineoplastic activity of anticancer drugs and of their toxic effects on the peripheral nervous system in the BALB/c mouse strain.
Collapse
Affiliation(s)
- V A Carozzi
- Department of Neuroscience and Biomedical Technologies, University of Milano-Bicocca, Monza (MI), Italy.
| | | | | | | | | | | | | | | | | |
Collapse
|