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Lin Z, Luo X, Wickman JR, Reddy D, DaCunza JT, Pande R, Tian Y, Kasimoglu EE, Triana V, Lee J, Furdui CM, Pink D, Sacan A, Ajit SK. Inflammatory pain resolution by mouse serum-derived small extracellular vesicles. Brain Behav Immun 2024; 123:422-441. [PMID: 39349284 DOI: 10.1016/j.bbi.2024.09.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 09/23/2024] [Accepted: 09/27/2024] [Indexed: 10/02/2024] Open
Abstract
Current treatments for chronic pain have limited efficacy and significant side effects, warranting research on alternative strategies for pain management. One approach involves using small extracellular vesicles (sEVs), or exosomes, to transport beneficial biomolecular cargo to aid pain resolution. Exosomes are 30-150 nm sEVs that can be beneficial or harmful depending on their source and cargo composition. We report a comprehensive multi-modal analysis of different aspects of sEV characterization, miRNAs, and protein markers across sEV sources. To investigate the short- and long-term effects of mouse serum-derived sEVs in pain modulation, sEVs from naïve control or spared nerve injury (SNI) model male donor mice were injected intrathecally into naïve male recipient mice. These sEVs transiently increased basal mechanical thresholds, an effect mediated by opioid signaling as this outcome was blocked by naltrexone. Mass spectrometry of sEVs detected endogenous opioid peptide leu-enkephalin. sEVs from naïve female mice have higher levels of leu-enkephalin compared to male, matching the analgesic onset of leu-enkephalin in male recipient mice. In investigating the long-term effect of sEVs, we observed that a single prophylactic intrathecal injection of sEVs two weeks prior to induction of the pain model in recipient mice accelerated recovery from inflammatory pain after complete Freund's adjuvant (CFA) injection. Our exploratory studies examining immune cell populations in spinal cord and dorsal root ganglion using ChipCytometry suggested alterations in immune cell populations 14 days post-CFA. Flow cytometry confirmed increases in CD206+ macrophages in the spinal cord in sEV-treated mice. Collectively, these studies demonstrate multiple mechanisms by which sEVs can attenuate pain.
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Affiliation(s)
- Zhucheng Lin
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA
| | - Xuan Luo
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA
| | - Jason R Wickman
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA
| | - Deepa Reddy
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA
| | - Jason T DaCunza
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA
| | - Richa Pande
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA
| | - Yuzhen Tian
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA
| | - Ezgi E Kasimoglu
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA
| | | | - Jingyun Lee
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Cristina M Furdui
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Desmond Pink
- Nanostics Inc., Edmonton, Alberta T5J 4P6, Canada
| | - Ahmet Sacan
- School of Biomedical Engineering, Science & Health Systems, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA
| | - Seena K Ajit
- Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Mail Stop 488, Room 8223, Philadelphia, PA 19102, USA.
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Zhong P, Bai L, Hong M, Ouyang J, Wang R, Zhang X, Chen P. A Comprehensive Review on Circulating cfRNA in Plasma: Implications for Disease Diagnosis and Beyond. Diagnostics (Basel) 2024; 14:1045. [PMID: 38786343 PMCID: PMC11119755 DOI: 10.3390/diagnostics14101045] [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: 04/14/2024] [Revised: 05/13/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
Circulating cfRNA in plasma has emerged as a fascinating area of research with potential applications in disease diagnosis, monitoring, and personalized medicine. Circulating RNA sequencing technology allows for the non-invasive collection of important information about the expression of target genes, eliminating the need for biopsies. This comprehensive review aims to provide a detailed overview of the current knowledge and advancements in the study of plasma cfRNA, focusing on its diverse landscape and biological functions, detection methods, its diagnostic and prognostic potential in various diseases, challenges, and future perspectives.
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Affiliation(s)
- Pengqiang Zhong
- Department of Clinical Laboratory, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Lu Bai
- Department of Clinical Laboratory, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Mengzhi Hong
- Department of Clinical Laboratory, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Juan Ouyang
- Department of Clinical Laboratory, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Ruizhi Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Xiaoli Zhang
- Department of Pediatrics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Peisong Chen
- Department of Clinical Laboratory, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
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3
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Mustonen AM, Palviainen M, Säisänen L, Karttunen L, Tollis S, Esrafilian A, Reijonen J, Julkunen P, Siljander PRM, Kröger H, Mäki J, Arokoski J, Nieminen P. Tetraspanin profiles of serum extracellular vesicles reflect functional limitations and pain perception in knee osteoarthritis. Arthritis Res Ther 2024; 26:33. [PMID: 38254142 PMCID: PMC10801950 DOI: 10.1186/s13075-023-03234-0] [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: 12/04/2023] [Accepted: 12/11/2023] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND Emerging evidence suggests that extracellular vesicles (EVs) can play roles in inflammatory processes and joint degradation in primary osteoarthritis (OA), a common age-associated joint disease. EV subpopulations express tetraspanins and platelet markers that may reflect OA pathogenesis. The present study investigated the associations between these EV surface markers and articular cartilage degradation, subjectively and objectively assessed pain, and functional limitations in primary knee OA (KOA). METHODS Serum EVs were determined by high-sensitivity flow cytometry (large CD61+ EVs) and single particle interferometric reflectance imaging sensor (small CD41+, CD63+, CD81+, and CD9+ EVs) from end-stage KOA patients and controls (n = 8 per group). Knee pain and physical functions were assessed with several health- and pain-related questionnaires, established measurements of physical medicine, and neuromuscular examination. The obtained data were analyzed using supervised and unsupervised univariate and multivariate models. RESULTS With the combined dataset of cartilage thickness, knee function, pain, sensation, and EV molecular signatures, we identified highly correlated groups of variables and found several EV markers that were statistically significant predictors of pain, physical limitations, and other aspects of well-being for KOA patients, for instance CD41+/CD63+/CD9+ small EVs associated with the range of motion of the knee, physical performance, and pain sensitivity. CONCLUSIONS Particular serum EV subpopulations showed clear associations with KOA pain and functional limitations, suggesting that their implications in OA pathophysiology warrant further study.
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Affiliation(s)
- Anne-Mari Mustonen
- Institute of Biomedicine, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland.
- Department of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology, University of Eastern Finland, Joensuu, Finland.
| | - Mari Palviainen
- EV core and EV group, Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences University of Helsinki, Helsinki, Finland
| | - Laura Säisänen
- Department of Clinical Neurophysiology, Kuopio University Hospital, Kuopio, Finland
- Department of Technical Physics, Faculty of Science, Forestry and Technology, University of Eastern Finland, Kuopio, Finland
| | - Lauri Karttunen
- Department of Physical and Rehabilitation Medicine, Central Finland Hospital Nova, Jyväskylä, Finland
| | - Sylvain Tollis
- Institute of Biomedicine, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland.
| | - Amir Esrafilian
- Department of Technical Physics, Faculty of Science, Forestry and Technology, University of Eastern Finland, Kuopio, Finland
| | - Jusa Reijonen
- Department of Clinical Neurophysiology, Kuopio University Hospital, Kuopio, Finland
- Department of Technical Physics, Faculty of Science, Forestry and Technology, University of Eastern Finland, Kuopio, Finland
| | - Petro Julkunen
- Department of Clinical Neurophysiology, Kuopio University Hospital, Kuopio, Finland
- Department of Technical Physics, Faculty of Science, Forestry and Technology, University of Eastern Finland, Kuopio, Finland
| | - Pia R-M Siljander
- EV core and EV group, Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences University of Helsinki, Helsinki, Finland
| | - Heikki Kröger
- Department of Orthopaedics, Traumatology and Hand Surgery, Kuopio University Hospital, Kuopio, Finland
- Kuopio Musculoskeletal Research Unit, University of Eastern Finland, Kuopio, Finland
| | - Jussi Mäki
- Department of Rehabilitation, Kuopio University Hospital, Kuopio, Finland
| | - Jari Arokoski
- Department of Physical and Rehabilitation Medicine, Helsinki University Hospital, Helsinki, Finland and University of Helsinki, Helsinki, Finland
| | - Petteri Nieminen
- Institute of Biomedicine, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
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Pando M, Yang R, Dimitrov G, Chavez R, Garza T, Trevino AV, Gautam A, Stark TR, Hammamieh R, Clifford J, Sosanya NM. Identifying Stress-Exacerbated Thermal-Injury Induced MicroRNAs. THE JOURNAL OF PAIN 2023; 24:2294-2308. [PMID: 37468024 DOI: 10.1016/j.jpain.2023.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 06/26/2023] [Accepted: 07/12/2023] [Indexed: 07/21/2023]
Abstract
Using a model of combat and operational stress reaction (COSR), our lab recently showed that exposure to an unpredictable combat stress (UPCS) procedure prior to a thermal injury increases pain sensitivity in male rats. Additionally, our lab has recently shown that circulating extracellular vesicle-microRNAs (EV-miRNAs), which normally function to suppress inflammation, were downregulated in a male rat model of neuropathic pain. In this current study, male and female rats exposed to UPCS, followed by thermal injury, were evaluated for changes in circulating EV-miRNAs. Adult female and male Sprague Dawley rats were exposed to a UPCS procedure for either 2 or 4 weeks. Groups consisted of the following: nonstress (NS), stress (S), NS + thermal injury (TI), and S + TI. Mechanical sensitivity was measured, and plasma was collected at baseline, throughout the UPCS exposure, and post-thermal injury. EV-miRNA isolation was performed, followed by small RNA sequencing and subsequent data analysis. UPCS exposure alone resulted in mechanical allodynia in both male and female rats at specific time points. Thermal-injury induction occurring at peak UPCS resulted in increased mechanical allodynia in the injured hind paw compared to thermal injury alone. Differential expression of the EV-miRNAs was observed between the NS and S groups as well as between NS + TI and S + TI groups. Consistent differences in EV-miRNAs are detectable in both COSR as well as during the development of mechanical sensitivity and potentially serve as key regulators, biomarkers, and targets in the treatment of COSR and thermal-injury induced mechanical sensitivity. PERSPECTIVE: This article presents the effects of unpredictable combat stress and thermal injury on EV-contained microRNAs in an animal model. These same mechanisms may exist in clinical patients and could be future prognostic and diagnostic biomarkers.
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Affiliation(s)
- Miryam Pando
- US Army Institute of Surgical Research (USAISR), JBSA Ft Sam Houston, San Antonio, Texas
| | - Ruoting Yang
- Medical Readiness Systems Biology Branch, Center for Military Psychiatry and Neuroscience, Walter Reed Army Institute of Research, Silver Spring, Maryland
| | - George Dimitrov
- Medical Readiness Systems Biology Branch, The Geneva Foundation, Tacoma, Washington
| | - Roger Chavez
- US Army Institute of Surgical Research (USAISR), JBSA Ft Sam Houston, San Antonio, Texas
| | - Thomas Garza
- US Army Institute of Surgical Research (USAISR), JBSA Ft Sam Houston, San Antonio, Texas
| | - Alex V Trevino
- US Army Institute of Surgical Research (USAISR), JBSA Ft Sam Houston, San Antonio, Texas
| | - Aarti Gautam
- Medical Readiness Systems Biology Branch, Center for Military Psychiatry and Neuroscience, Walter Reed Army Institute of Research, Silver Spring, Maryland
| | - Thomas R Stark
- US Army Institute of Surgical Research (USAISR), JBSA Ft Sam Houston, San Antonio, Texas
| | - Rasha Hammamieh
- Medical Readiness Systems Biology Branch, The Geneva Foundation, Tacoma, Washington
| | - John Clifford
- US Army Institute of Surgical Research (USAISR), JBSA Ft Sam Houston, San Antonio, Texas
| | - Natasha M Sosanya
- US Army Institute of Surgical Research (USAISR), JBSA Ft Sam Houston, San Antonio, Texas
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Williams S, Jalal AR, Lewis MP, Davies OG. A survey to evaluate parameters governing the selection and application of extracellular vesicle isolation methods. J Tissue Eng 2023; 14:20417314231155114. [PMID: 36911574 PMCID: PMC9996742 DOI: 10.1177/20417314231155114] [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: 11/11/2022] [Accepted: 01/19/2023] [Indexed: 03/11/2023] Open
Abstract
Extracellular vesicles (EVs) continue to gain interest across the scientific community for diagnostic and therapeutic applications. As EV applications diversify, it is essential that researchers are aware of challenges, in particular the compatibility of EV isolation methods with downstream applications and their clinical translation. We report outcomes of the first cross-comparison study looking to determine parameters (EV source, starting volume, operator experience, application and implementation parameters such as cost and scalability) governing the selection of popular EV isolation methods across disciplines. Our findings highlighted an increased clinical focus, with 36% of respondents applying EVs in therapeutics and diagnostics. Data indicated preferential selection of ultracentrifugation for therapeutic applications, precipitation reagents in clinical settings and size exclusion chromatography for diagnostic applications utilising biofluids. Method selection was influenced by operator experience, with increased method diversity when EV research was not the respondents primary focus. Application and implementation criteria were indicated to be major influencers in method selection, with UC and SEC chosen for their abilities to process large and small volumes, respectively. Overall, we identified parameters influencing method selection across the breadth of EV science, providing a valuable overview of practical considerations for the effective translation of research outcomes.
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Affiliation(s)
- Soraya Williams
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Aveen R Jalal
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Mark P Lewis
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Owen G Davies
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
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6
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Zhang K, Li P, Jia Y, Liu M, Jiang J. Concise review: Current understanding of extracellular vesicles to treat neuropathic pain. Front Aging Neurosci 2023; 15:1131536. [PMID: 36936505 PMCID: PMC10020214 DOI: 10.3389/fnagi.2023.1131536] [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: 12/25/2022] [Accepted: 02/09/2023] [Indexed: 03/06/2023] Open
Abstract
Extracellular vesicles (EVs) including exosomes are vesicular vesicles with phospholipid bilayer implicated in many cellular interactions and have the ability to transfer multiple types of cargo to cells. It has been found that EVs can package various molecules including proteins and nucleic acids (DNA, mRNA, and noncoding RNA). The discovery of EVs as carriers of proteins and various forms of RNA, such as microRNAs (miRNA) and long noncoding RNAs (lncRNA), has raised great interest in the field of drug delivery. Despite the underlying mechanisms of neuropathic pain being unclear, it has been shown that uncontrolled glial cell activation and the neuroinflammation response to noxious stimulation are important in the emergence and maintenance of neuropathic pain. Many studies have demonstrated a role for noncoding RNAs in the pathogenesis of neuropathic pain and EVs may offer possibilities as carriers of noncoding RNAs for potential in neuropathic pain treatment. In this article, the origins and clinical application of EVs and the mechanism of neuropathic pain development are briefly introduced. Furthermore, we demonstrate the therapeutic roles of EVs in neuropathic pain and that this involve vesicular regulation of glial cell activation and neuroinflammation.
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7
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Jiang M, Wang Y, Wang J, Feng S, Wang X. The etiological roles of miRNAs, lncRNAs, and circRNAs in neuropathic pain: A narrative review. J Clin Lab Anal 2022; 36:e24592. [PMID: 35808924 PMCID: PMC9396192 DOI: 10.1002/jcla.24592] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 06/24/2022] [Accepted: 06/25/2022] [Indexed: 11/16/2022] Open
Abstract
Background Non‐coding RNAs (ncRNAs) are involved in neuropathic pain development. Herein, we systematically searched for neuropathic pain‐related ncRNAs expression changes, including microRNAs (miRNAs), long non‐coding RNAs (lncRNAs), and circular non‐coding RNAs (circRNAs). Methods We searched two databases, PubMed and GeenMedical, for relevant studies. Results Peripheral nerve injury or noxious stimuli can induce extensive changes in the expression of ncRNAs. For example, higher serum miR‐132‐3p, ‐146b‐5p, and ‐384 was observed in neuropathic pain patients. Either sciatic nerve ligation, dorsal root ganglion (DRG) transaction, or ventral root transection (VRT) could upregulate miR‐21 and miR‐31 while downregulating miR‐668 and miR‐672 in the injured DRG. lncRNAs, such as early growth response 2‐antisense‐RNA (Egr2‐AS‐RNA) and Kcna2‐AS‐RNA, were upregulated in Schwann cells and inflicted DRG after nerve injury, respectively. Dysregulated circRNA homeodomain‐interacting protein kinase 3 (circHIPK3) in serum and the DRG, abnormally expressed lncRNAs X‐inactive specific transcript (XIST), nuclear enriched abundant transcript 1 (NEAT1), small nucleolar RNA host gene 1 (SNHG1), as well as ciRS‐7, zinc finger protein 609 (cirZNF609), circ_0005075, and circAnks1a in the spinal cord were suggested to participate in neuropathic pain development. Dysregulated miRNAs contribute to neuropathic pain via neuroinflammation, autophagy, abnormal ion channel expression, regulating pain‐related mediators, protein kinases, structural proteins, neurotransmission excitatory–inhibitory imbalances, or exosome miRNA‐mediated neuron–glia communication. In addition, lncRNAs and circRNAs are essential in neuropathic pain by acting as antisense RNA and miRNA sponges, epigenetically regulating pain‐related molecules expression, or modulating miRNA processing. Conclusions Numerous dysregulated ncRNAs have been suggested to participate in neuropathic pain development. However, there is much work to be done before ncRNA‐based analgesics can be clinically used for various reasons such as conservation among species, proper delivery, stability, and off‐target effects.
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Affiliation(s)
- Ming Jiang
- Department of Anesthesiology and Pain Medicine, Nanjing Maternity and Child Health Care Hospital, Women's Hospital of Nanjing Medical University, Nanjing, China
| | - Yelong Wang
- Department of Anesthesiology, Gaochun People's Hospital, Nanjing, China
| | - Jing Wang
- Department of Anesthesiology and Pain Medicine, Nanjing Maternity and Child Health Care Hospital, Women's Hospital of Nanjing Medical University, Nanjing, China
| | - Shanwu Feng
- Department of Anesthesiology and Pain Medicine, Nanjing Maternity and Child Health Care Hospital, Women's Hospital of Nanjing Medical University, Nanjing, China
| | - Xian Wang
- Department of Anesthesiology and Pain Medicine, Nanjing Maternity and Child Health Care Hospital, Women's Hospital of Nanjing Medical University, Nanjing, China
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Zhou YK, Patel HH, Roth DM. Extracellular Vesicles: A New Paradigm for Cellular Communication in Perioperative Medicine, Critical Care, and Pain Management. Anesth Analg 2021; 133:1162-1179. [PMID: 34304233 PMCID: PMC8542619 DOI: 10.1213/ane.0000000000005655] [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] [Indexed: 11/05/2022]
Abstract
Extracellular vesicles (EVs) play critical roles in many health and disease states, including ischemia, inflammation, and pain, which are major concerns in the perioperative period and in critically ill patients. EVs are functionally active, nanometer-sized, membrane-bound vesicles actively secreted by all cells. Cell signaling is essential to physiological and pathological processes, and EVs have recently emerged as key players in intercellular communication. Recent studies in EV biology have improved our mechanistic knowledge of the pathophysiological processes in perioperative and critical care patients. Studies also show promise in using EVs in novel diagnostic and therapeutic clinical applications. This review considers the current advances and gaps in knowledge of EVs in the areas of ischemia, inflammation, pain, and in organ systems that are most relevant to anesthesiology, perioperative medicine, critical care, and pain management. We expect the reader will better understand the relationship between EVs and perioperative and critical care pathophysiological states and their potential use as novel diagnostic and therapeutic modalities.
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Affiliation(s)
- Yingqiu K. Zhou
- Veterans Administration San Diego Healthcare System, San Diego, CA, USA and Department of Anesthesiology, UCSD School of Medicine, San Diego, CA, USA
| | - Hemal H. Patel
- Veterans Administration San Diego Healthcare System, San Diego, CA, USA and Department of Anesthesiology, UCSD School of Medicine, San Diego, CA, USA
| | - David M. Roth
- Veterans Administration San Diego Healthcare System, San Diego, CA, USA and Department of Anesthesiology, UCSD School of Medicine, San Diego, CA, USA
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Zheng Y, Jia C, Jiang X, Chen J, Chen XL, Ying X, Wu J, Jiang M, Yang G, Tu W, Zhou K, Jiang S. Electroacupuncture effects on the P2X4R pathway in microglia regulating the excitability of neurons in the substantia gelatinosa region of rats with spinal nerve ligation. Mol Med Rep 2021; 23:175. [PMID: 33398365 PMCID: PMC7821227 DOI: 10.3892/mmr.2020.11814] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 05/05/2020] [Indexed: 01/02/2023] Open
Abstract
Electroacupuncture (EA) has been used to treat neuropathic pain induced by peripheral nerve injury (PNI) by applying an electrical current to acupoints with acupuncture needles. However, the mechanisms by which EA treats pain remain indistinct. High P2X4 receptor (P2X4R) expression levels demonstrate a notable increase in hyperactive microglia in the ipsilateral spinal dorsal horn following PNI. In order to demonstrate the possibility that EA analgesia is mediated in part by P2X4R in hyperactive microglia, the present study performed mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL) tests in male Sprague-Dawley rats that had undergone spinal nerve ligation (SNL). The expression levels of spinal P2X4R were determined using reverse transcription-quantitative PCR, western blotting analysis and immunofluorescence staining. Furthermore, spontaneous excitatory postsynaptic currents (sEPSCs) were recorded using whole-cell patch clamp to demonstrate the effect of EA on synaptic transmission in rat spinal substantia gelatinosa (SG) neurons. The results of the present study demonstrated that EA increased the MWT and TWL and decreased overexpression of P2X4R in hyperactive microglia in SNL rats. Moreover, EA attenuated the frequency of sEPSCs in SG neurons in SNL rats. The results of the present study indicate that EA may mediate P2X4R in hyperactive spinal microglia to inhibit nociceptive transmission of SG neurons, thus relieving pain in SNL rats.
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Affiliation(s)
- Yuyin Zheng
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Chengqian Jia
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Xia Jiang
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Jie Chen
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Xiao-Long Chen
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Xinwang Ying
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Jiayu Wu
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Mingchen Jiang
- China‑USA Institute for Acupuncture and Rehabilitation, Integrative and Optimized Medicine Research Center, Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Guanhu Yang
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Wenzhan Tu
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Kecheng Zhou
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Songhe Jiang
- Department of Physical Medicine and Rehabilitation, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
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Hartrick CT, Poulin D, Molenaar R, Hartrick A. Dual-Acting Peripherally Restricted Delta/Kappa Opioid (CAV1001) Produces Antinociception in Animal Models of Sub-Acute and Chronic Pain. J Pain Res 2020; 13:2461-2474. [PMID: 33116788 PMCID: PMC7547792 DOI: 10.2147/jpr.s262303] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 08/20/2020] [Indexed: 12/15/2022] Open
Abstract
Background The development of highly efficacious alternatives to mu-opioid analgesics represents an urgent unmet medical and public health need. In the presence of inflammation both delta- and kappa-opioid agonists, acting on peripheral sensory neurons, mediate analgesia. The dual-acting, peripherally restricted kappa/delta-opioid agonist, CAV1001, was tested in four rodent pain models. Methods Experiment 1 – Formalin testing in mice. Three doses (1–10 mg/kg) of CAV1001 or ICI204448 at 30 minutes were tested after formalin injection. Spontaneous nocifensive responses were video recorded. Experiment 2 – Complete Freund’s Adjuvant (CFA)-induced arthritis. CFA was injected into the ankle joint of rats. Joint compression thresholds (JCT) were measured. CAV1001 was compared to celecoxib. Experiment 3 – Spinal nerve ligation (SNL) in rats. Paw compression thresholds (PCT) were measured. CAV1001 was compared to gabapentin. Experiment 4 – MMRT-1 bone cancer implantation into the rat tibia. Weight-bearing was assessed. CAV1001 was compared to morphine. Results In Phase 2 of the formalin model, CAV1001 (1 mg/kg) significantly reduced pain behaviors to a degree comparable to the peripherally restricted kappa-opioid agonist, ICI204448 (10 mg/kg). CAV1001 (10 mg/kg) effectively eliminated pain behaviors associated with phase 2. In the CFA-induced arthritis model, a significant increase in JCTs, similar to the comparator celecoxib, was observed with CAV1001 at 1 mg/kg at 2 hours; CAV1001 (10 mg/kg) was effective at 1 hour. In the SNL model, both the comparator gabapentin and CAV1001 (5 mg/kg) significantly reduced PCT at 2 hours, but at 4 hours, the CAV1001 thresholds improved to baseline. CAV1001 10 mg/kg significantly improved weight bearing at 4-hour post-dosing compared to baseline following MMRT-1 implantation. Conclusion CAV1001 demonstrated efficacy in several different preclinical pain models. Time- and dose-dependent differences in the efficacy of CAV1001 amongst these rodent pain models parallel the degree of underlying inflammation.
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Otani K, Yokoya M, Fujioka Y, Okada M, Yamawaki H. Small extracellular vesicles from rat plasma promote migration and proliferation of vascular smooth muscle cells. J Vet Med Sci 2020; 82:299-306. [PMID: 31902833 PMCID: PMC7118471 DOI: 10.1292/jvms.19-0643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Small extracellular vesicles (sEV) contain various molecules and mediate cell-to-cell
communication under both physiological and pathological conditions. We have recently
reported that sEV isolated from plasma of normotensive Wistar Kyoto rats (WKY) and
spontaneously hypertensive rats (SHR) regulate systemic blood pressure. The initiation and
development of hypertension partly rely on proliferation and migration of vascular smooth
muscle cells (SMCs) followed by the structural remodeling of vascular wall. In the present
study, we examined the effects of plasma sEV in WKY and SHR on the proliferative and
migratory functions of primary rat aortic SMCs. There was no difference in the
concentration and size distribution of plasma sEV between WKY and SHR, while the protein
expression of CD81 in plasma sEV from SHR was lower than that from WKY. Both plasma sEV
from WKY and SHR were internalized into SMCs and stimulated the migration and
proliferation with a similar potency. In summary, we, for the first time, demonstrated
that plasma sEV in WKY and SHR are physiologically active in terms of proliferative and
migratory functions, however, these effects do not seem to be related to the pathogenesis
of hypertension development.
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Affiliation(s)
- Kosuke Otani
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Aomori 034-8628, Japan
| | - Mai Yokoya
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Aomori 034-8628, Japan
| | - Yusei Fujioka
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Aomori 034-8628, Japan
| | - Muneyoshi Okada
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Aomori 034-8628, Japan
| | - Hideyuki Yamawaki
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Towada, Aomori 034-8628, Japan
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