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Wen B, Zhu H, Xu J, Xu L, Huang Y. NMDA Receptors Regulate Oxidative Damage in Keratinocytes during Complex Regional Pain Syndrome in HaCaT Cells and Male Rats. Antioxidants (Basel) 2024; 13:244. [PMID: 38397842 PMCID: PMC10886417 DOI: 10.3390/antiox13020244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 01/29/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024] Open
Abstract
Complex regional pain syndrome (CRPS), a type of primary chronic pain, occurs following trauma or systemic disease and typically affects the limbs. CRPS-induced pain responses result in vascular, cutaneous, and autonomic nerve alterations, seriously impacting the quality of life of affected individuals. We previously identified the involvement of keratinocyte N-methyl-d-asparagic acid (NMDA) receptor subunit 2 B (NR2B) in both peripheral and central sensitizations in CRPS, although the mechanisms whereby NR2B functions following activation remain unclear. Using an in vivo male rat model of chronic post-ischemia pain (CPIP) and an in vitro oxygen-glucose deprivation/reoxygenation (OGD/R) cell model, we discovered that oxidative injury occurs in rat keratinocytes and HaCaT cells, resulting in reduced cell viability, mitochondrial damage, oxidative damage of nucleotides, and increased apoptosis. In HaCaT cells, OGD/R induced increases in intracellular reactive oxygen species levels and disrupted the balance between oxidation and antioxidation by regulating a series of antioxidant genes. The activation of NMDA receptors via NMDA exacerbated these changes, whereas the inhibition of the NR2B subunit alleviated them. Co-administration of ifenprodil (an NR2B antagonist) and NMDA (an NMDA receptor agonist) during the reoxygenation stage did not result in any significant alterations. Furthermore, intraplantar injection of ifenprodil effectively reversed the altered gene expression that was observed in male CPIP rats, thereby revealing the potential mechanisms underlying the therapeutic effects of peripheral ifenprodil administration in CRPS. Collectively, our findings indicate that keratinocytes undergo oxidative injury in CRPS, with NMDA receptors playing regulatory roles.
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Affiliation(s)
- Bei Wen
- Department of Anesthesiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China; (B.W.); (H.Z.)
| | - He Zhu
- Department of Anesthesiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China; (B.W.); (H.Z.)
| | - Jijun Xu
- Department of Pain Management, Cleveland Clinic, Cleveland, OH 44195, USA;
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Li Xu
- Department of Anesthesiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China; (B.W.); (H.Z.)
| | - Yuguang Huang
- Department of Anesthesiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China; (B.W.); (H.Z.)
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Dahlin E, Zimmerman M, Nyman E. Patient reported symptoms and disabilities before and after neuroma surgery: a register-based study. Sci Rep 2023; 13:17226. [PMID: 37821445 PMCID: PMC10567846 DOI: 10.1038/s41598-023-44027-4] [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: 05/17/2023] [Accepted: 10/03/2023] [Indexed: 10/13/2023] Open
Abstract
Residual problems may occur from neuroma despite surgery. In a 12-month follow-up study using national register data, symptoms, and disabilities related to surgical methods and sex were evaluated in patients surgically treated for a neuroma. Among 196 identified patients (55% men; lower age; preoperative response rate 20%), neurolysis for nerve tethering/scar formation was the most used surgical method (41%; more frequent in women) irrespective of affected nerve. Similar preoperative symptoms were seen in patients, where different surgical methods were performed. Pain on load was the dominating symptom preoperatively. Women scored higher preoperatively at pain on motion without load, weakness and QuickDASH. Pain on load and numbness/tingling in fingers transiently improved. The ability to perform daily activities was better after nerve repair/reconstruction/transposition than after neurolysis. Regression analysis, adjusted for age, sex, and affected nerve, showed no association between surgical method and pain on load, tingling/numbness in fingers, or ability to perform daily activities. Neuroma, despite surgery, causes residual problems, affecting daily life. Choice of surgical method is not strongly related to pre- or postoperative symptoms. Neurolysis has similar outcome as other surgical methods. Women have more preoperative symptoms and disabilities than men. Future research would benefit from a neuroma-specific ICD-code, leading to a more precise identification of patients.
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Affiliation(s)
- Emma Dahlin
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
- Varberg Hospital, Varberg, Sweden.
- Department of Translational Medicine-Hand Surgery, Lund University, Malmö, Sweden.
| | - Malin Zimmerman
- Department of Translational Medicine-Hand Surgery, Lund University, Malmö, Sweden
- Department of Orthopaedics, Helsingborg Hospital, Helsingborg, Sweden
| | - Erika Nyman
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Hand Surgery, Plastic Surgery, and Burns, Linköping University Hospital, Linköping, Sweden
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Dahlin E, Gudinge H, Dahlin LB, Nyman E. Neuromas cause severe residual problems at long-term despite surgery. Sci Rep 2023; 13:15693. [PMID: 37735475 PMCID: PMC10514298 DOI: 10.1038/s41598-023-42245-4] [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: 04/09/2023] [Accepted: 09/07/2023] [Indexed: 09/23/2023] Open
Abstract
Pain, and disabilities after neuroma surgery, using patient reported outcome measurements (PROMs), were evaluated by QuickDASH and a specific Hand Questionnaire (HQ-8). The 69 responding individuals (response rate 61%; 59% women; 41% men; median follow up 51 months) reported high QuickDASH score, pain on load, cold sensitivity, ability to perform daily activities and sleeping difficulties. Individuals reporting impaired ability to perform daily activities and sleeping problems had higher scores for pain, stiffness, weakness, numbness/tingling, cold sensitivity and QuickDASH. Only 17% of individuals reported no limitations at all. No differences were observed between sexes. Surgical methods did not influence outcome. Symptoms and disabilities correlated moderately-strongly to each other and to ability to perform regular daily activities as well as to sleeping difficulties. Pain, cold sensitivity, sleeping difficulties and limitation to perform daily activities were associated to higher QuickDASH. A weak association was found between follow up time and QuickDASH score as well as pain on load, but not cold sensitivity. A major nerve injury was frequent among those with limitations during work/performing other regular daily activities. Despite surgical treatment, neuromas cause residual problems, which affect the capacity to perform daily activities and ability to sleep with limited improvement in long-term.
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Affiliation(s)
- Emma Dahlin
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
- Department of Translational Medicine-Hand Surgery, Lund University, Jan Waldenströms gata 5, 20502, Malmö, Sweden.
- Varberg Hospital, Region Halland, Varberg, Sweden.
| | - Hanna Gudinge
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Translational Medicine-Hand Surgery, Lund University, Jan Waldenströms gata 5, 20502, Malmö, Sweden
| | - Lars B Dahlin
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Translational Medicine-Hand Surgery, Lund University, Jan Waldenströms gata 5, 20502, Malmö, Sweden
- Department of Hand Surgery, Skåne University Hospital, Malmö, Sweden
| | - Erika Nyman
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Hand Surgery, Plastic Surgery and Burns, Linköping University Hospital, Linköping, Sweden
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Weitz J, Garg B, Martsinkovskiy A, Patel S, Tiriac H, Lowy AM. Pancreatic ductal adenocarcinoma induces neural injury that promotes a transcriptomic and functional repair signature by peripheral neuroglia. Oncogene 2023; 42:2536-2546. [PMID: 37433986 PMCID: PMC10880465 DOI: 10.1038/s41388-023-02775-7] [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: 03/20/2023] [Revised: 06/23/2023] [Accepted: 06/30/2023] [Indexed: 07/13/2023]
Abstract
Perineural invasion (PNI) is the phenomenon whereby cancer cells invade the space surrounding nerves. PNI occurs frequently in epithelial malignancies, but is especially characteristic of pancreatic ductal adenocarcinoma (PDAC). The presence of PNI portends an increased incidence of local recurrence, metastasis and poorer overall survival. While interactions between tumor cells and nerves have been investigated, the etiology and initiating cues for PNI development is not well understood. Here, we used digital spatial profiling to reveal changes in the transcriptome and to allow for a functional analysis of neural-supportive cell types present within the tumor-nerve microenvironment of PDAC during PNI. We found that hypertrophic tumor-associated nerves within PDAC express transcriptomic signals of nerve damage including programmed cell death, Schwann cell proliferation signaling pathways, as well as macrophage clearance of apoptotic cell debris by phagocytosis. Moreover, we identified that neural hypertrophic regions have increased local neuroglial cell proliferation which was tracked using EdU tumor labeling in KPC mice, as well as frequent TUNEL positivity, suggestive of a high turnover rate. Functional calcium imaging studies using human PDAC organotypic slices confirmed nerve bundles had neuronal activity, as well as contained NGFR+ cells with high sustained calcium levels, which are indicative of apoptosis. This study reveals a common gene expression pattern that characterizes solid tumor-induced damage to local nerves. These data provide new insights into the pathobiology of the tumor-nerve microenvironment during PDAC as well as other gastrointestinal cancers.
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Affiliation(s)
- Jonathan Weitz
- Department of Surgery, University of California, San Diego, La Jolla, CA, CA 92093, USA.
| | - Bharti Garg
- Department of Surgery, University of California, San Diego, La Jolla, CA, CA 92093, USA
| | - Alexei Martsinkovskiy
- Department of Surgery, University of California, San Diego, La Jolla, CA, CA 92093, USA
| | - Sandip Patel
- Division of Hematology-Oncology in the Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Herve Tiriac
- Department of Surgery, University of California, San Diego, La Jolla, CA, CA 92093, USA
| | - Andrew M Lowy
- Department of Surgery, University of California, San Diego, La Jolla, CA, CA 92093, USA.
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Weitz J, Garg B, Tiriac H, Martsinkovskiy A, Patel S, Lowy A. Pancreatic Ductal Adenocarcinoma Induces Neural Injury that Promotes a Transcriptomic and Functional Repair Signature by Peripheral Neuroglia. RESEARCH SQUARE 2023:rs.3.rs-2715023. [PMID: 37034696 PMCID: PMC10081383 DOI: 10.21203/rs.3.rs-2715023/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Perineural invasion (PNI) is the phenomenon whereby cancer cells invade the space surrounding nerves. PNI occurs frequently in epithelial malignancies, but is especially characteristic of pancreatic ductal adenocarcinoma (PDAC). The presence of PNI portends an increased incidence of local recurrence, metastasis and poorer overall survival. While interactions between tumor cells and nerves have been investigated, the etiology and initiating cues for PNI development is not well understood. Here, we used digital spatial profiling to reveal changes in the transcriptome and to allow for a functional analysis of neural-supportive cell types present within the tumor-nerve microenvironment of PDAC during PNI. We found that hypertrophic tumor-associated nerves within PDAC express transcriptomic signals of nerve damage including programmed cell death, Schwann cell proliferation signaling pathways, as well as macrophage clearance of apoptotic cell debris by phagocytosis. Moreover, we identified that neural hypertrophic regions have increased local neuroglial cell proliferation which was tracked using EdU tumor labeling in KPC mice. This study reveals a common gene expression pattern that characterizes solid tumor-induced damage to local nerves. These data provide new insights into the pathobiology of the tumor-nerve microenvironment during PDAC as well as other gastrointestinal cancers.
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Huang X, Deng J, Xu T, Xin W, Zhang Y, Ruan X. Downregulation of metallothionein-2 contributes to oxaliplatin-induced neuropathic pain. J Neuroinflammation 2021; 18:91. [PMID: 33849565 PMCID: PMC8045403 DOI: 10.1186/s12974-021-02139-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 03/26/2021] [Indexed: 12/15/2022] Open
Abstract
Background We previously reported a correlation between small doses of oxaliplatin penetrating onto the spinal cord and acute pain after chemotherapy. Here, we propose that MT2 within the spinal dorsal horns participates in the development of oxaliplatin-induced neuropathic pain and may be a pharmacological target for the prevention and treatment of chemotherapy-induced peripheral neuropathy (CIPN). Methods The rat model of CIPN was established by 5 consecutive injections of oxaliplatin (0.4 mg/100 g/day). Genetic restoration of neuron-specific metallothionein-2 was implemented 21 days before oxaliplatin treatment, and also, genetic inhibition by metallothionein-2 siRNA was performed. Mechanical allodynia and locomotor activity were assayed. Cell-specific expression of metallothionein-2, the mRNA levels of pro-inflammatory cytokines, nuclear translocation of NF-κB, the protein levels of expression of IκB-α, and interaction between IκB-α and P65 were evaluated in the spinal dorsal horns. Also, in vitro interaction of sequentially deleted IκB-α promoter with metallothionein-2 was used to assess the signal transduction mechanism. Results We found that oxaliplatin induced downregulation of metallothionein-2 in rat spinal cord neurons. By contrast, genetic restoration of metallothionein-2 in the spinal dorsal horn neuron blocked and reversed neuropathic pain in oxaliplatin-treated rats of both sexes, whereas genetic inhibition of metallothionein-2 triggered neuropathic pain in normal rats. Overall locomotor activity was not impaired after the genetic alterations of metallothionein-2. At the molecular level, metallothionein-2 modulated oxaliplatin-induced neuroinflammation, activation of NF-κB, and inactive transcriptional expression of IκB-α promoter, and these processes could be blocked by genetic restoration of metallothionein-2 in the spinal dorsal horn neurons. Conclusions Metallothionein-2 is a potential target for the prevention and treatment of CIPN. A reduction of NF-κB activation and inflammatory responses by enhancing the transcription of IκB-α promoter is proposed in the mechanism.
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Affiliation(s)
- Xuelin Huang
- Department of Anesthesia and Pain Medicine, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, 510000, Guangdong, China
| | - Jie Deng
- Guangdong Province Key Laboratory of Brain Function and Disease, Department of Physiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510000, China
| | - Ting Xu
- Guangdong Province Key Laboratory of Brain Function and Disease, Department of Physiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510000, China
| | - Wenjun Xin
- Guangdong Province Key Laboratory of Brain Function and Disease, Department of Physiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510000, China
| | - Yuehong Zhang
- Department of Ophthalmology, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, 510000, Guangdong, China. .,Department of Ophthalmology, The Second Affiliated Hospital of South China University of Technology, 602 Renminbei Road, Guangzhou, 510180, China.
| | - Xiangcai Ruan
- Department of Anesthesia and Pain Medicine, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, 510000, Guangdong, China. .,Department of Anesthesia and Pain Medicine, The Second Affiliated Hospital of South China University of Technology, 602 Renminbei Road, Guangzhou, 510180, China.
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Aoyama T, Takasawa A, Takasawa K, Ono Y, Emori M, Murata M, Hayasaka T, Fujitani N, Osanai M, Yamashita T, Hasegawa T, Sawada N. Identification of Coiled-Coil Domain-Containing Protein 180 and Leucine-Rich Repeat-Containing Protein 4 as Potential Immunohistochemical Markers for Liposarcoma Based on Proteomic Analysis Using Formalin-Fixed, Paraffin-Embedded Tissue. THE AMERICAN JOURNAL OF PATHOLOGY 2019; 189:1015-1028. [PMID: 30790560 DOI: 10.1016/j.ajpath.2019.01.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 01/04/2019] [Accepted: 01/24/2019] [Indexed: 12/17/2022]
Abstract
Recent technical improvements in both mass spectrometry and protein extraction have made it possible to use formalin-fixed, paraffin-embedded (FFPE) tissues for proteome analysis. In this study, comparable proteome analysis of FFPE tissues revealed multiple candidate marker molecules for differentiating atypical lipomatous tumor/well-differentiated liposarcoma (ALT/WDL) from lipoma. A total of 181 unique proteins were identified for ALT/WDL. Of the identified proteins, coiled-coil domain-containing protein 180 (CCDC180) and leucine-rich repeat-containing protein 4 (LRRC4) were studied as candidate markers of ALT/WDL. CCDC180 and LRRC4 immunohistochemistry clearly stained tumor cells of ALT/WDL and dedifferentiated liposarcoma and could differentiate them from lipoma with high accuracy. Cell biological methods were used to further examine the expression of the candidate marker molecules in liposarcoma cells. In liposarcoma cells, knockdown of CCDC180 and LRRC4 inhibited cell proliferation. CCDC180 inhibited cell migration, invasion, and apoptosis resistance in WDL cells. Adipogenic differentiation suppressed the expression of CCDC180 and LRRC4 in WDL cells. These results indicated that LRRC4 and CCDC180 are novel immunohistochemical markers for differentiating ALT/WDLs. Their expression was associated with adipocyte differentiation and contributed to malignant potentials of WDL cells. Proteome analysis using a standard stock of FFPE tissues can reveal novel biomarkers for various diseases, which contributes to the progress of molecular pathology.
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Affiliation(s)
- Tomoyuki Aoyama
- Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan; Department of Surgical Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Akira Takasawa
- Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan.
| | - Kumi Takasawa
- Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Yusuke Ono
- Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Makoto Emori
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Masaki Murata
- Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takahiro Hayasaka
- Department of Gastroenterological Surgery I, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Naoki Fujitani
- Department of Biochemistry, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Makoto Osanai
- Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Toshihiko Yamashita
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tadashi Hasegawa
- Department of Surgical Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Norimasa Sawada
- Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
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Gomez-Varela D, Barry AM, Schmidt M. Proteome-based systems biology in chronic pain. J Proteomics 2019; 190:1-11. [DOI: 10.1016/j.jprot.2018.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 03/15/2018] [Accepted: 04/05/2018] [Indexed: 02/07/2023]
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Das A, Sarwar MS, Hossain MS, Karmakar P, Islam MS, Hussain ME, Banik S. Elevated Serum Lipid Peroxidation and Reduced Vitamin C and Trace Element Concentrations Are Correlated With Epilepsy. Clin EEG Neurosci 2019; 50:63-72. [PMID: 29788779 DOI: 10.1177/1550059418772755] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Epilepsy is one of the chronic and heterogeneous epidemic neurological disorders leading to substantial mortality. The aim of the present study was to investigate the serum levels of malondialdehyde (MDA), vitamin C, and trace elements namely zinc (Zn), copper (Cu), and manganese (Mn) in epileptic patients of Bangladesh and to establish if there are any pathophysiological correlations. METHODS This was a case-control study with 40 generalized epileptic patients and 40 healthy subjects as controls. Epilepsy was determined by the presence of seizure events with an abnormal electroencephalography and magnetic resonance imaging report of brain. RESULTS Anthropometric parameters highlighted that age is a major risk factor of epilepsy and men are more prone to epilepsy than women. Blood serum analysis demonstrated significantly ( P < .001) higher values of MDA and lower level of vitamin C in the patient group (4.41 ± 0.76 μmol/mL and 18.31 ± 0.84 μmol/L, respectively) compared with control (1.81 ± 0.70 μmol/mL and 29.72 ± 1.06 μmol/L, respectively). Pearson's correlation analysis revealed a negative correlation between the serum level of MDA and vitamin C for both patient ( r = -0.023, P = .887) and control group ( r = -0.142, P = .383). This study also revealed that the trace elements (Zn, Cu) were significantly ( P < .05) lower in epileptics (68.32 ± 4.59 and 50.81 ± 2.54 μg/dL, respectively) where the level of Mn in patients (187.71 ± 9.04 μg/dL) was almost similar to that of the control group ( P > .05). The univariate analysis demonstrated that zinc <70 μg/dL (odds ratio = 3.56, P < .05) and copper <50 μg/dL were associated (odds ratio = 14.73, P < .001) with an increased risk of epilepsy. Establishment of interelement relationship strongly supported that there was a disturbance in the element homeostasis of epileptic patients. CONCLUSIONS The study results strengthen the role of lipid peroxidation, antioxidants and trace elements in the pathogenesis and warrant larger studies to investigate the association of these biochemical parameters with epilepsy.
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Affiliation(s)
- Abhijit Das
- 1 Department of Pharmacy, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Md Shahid Sarwar
- 1 Department of Pharmacy, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Md Shohel Hossain
- 2 Department of Pharmacy, School of Engineering, Science and Technology, Manarat International University, Dhaka, Bangladesh
| | - Palash Karmakar
- 1 Department of Pharmacy, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Mohammad Safiqul Islam
- 1 Department of Pharmacy, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Mohammad Enayet Hussain
- 3 Department of Neurology, National Institute of Neurosciences and Hospital, Dhaka, Bangladesh
| | - Sujan Banik
- 1 Department of Pharmacy, Noakhali Science and Technology University, Noakhali, Bangladesh
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Aiki H, Wada T, Iba K, Oki G, Sohma H, Yamashita T, Kokai Y. Proteomics analysis of site- and stage-specific protein expression after peripheral nerve injury. J Orthop Sci 2018; 23:1070-1078. [PMID: 30100211 DOI: 10.1016/j.jos.2018.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 06/14/2018] [Accepted: 07/18/2018] [Indexed: 01/26/2023]
Abstract
BACKGROUND The peripheral nervous system has greater regenerative potential than the CNS. This fact suggests the existence of molecules that act as key factors in nerve regeneration during molecular changes in the peripheral nervous system. METHODS The right sciatic nerve of female Sprague-Dawley rats was exposed and transected at the mid-thigh level. Animals were sacrificed at 5, 10 or 35 days after nerve transection. Proximal and distal nerve segments (1-cm in length) were dissected. We then sought to observe overall molecular changes after peripheral nerve injury using a proteomic approach. For an overview of the identified proteins, each protein was classified according to its biological and molecular functions. We identified a number of proteins showing site- and stage-specific patterns of expression. RESULTS Both proximal and distal molecular changes at 5, 10 and 35 days after nerve transection were investigated, and a total of 2353 proteins were identified. Among the various expression patterns observed, aFGF and GAP-43 were found to increase in the proximal stump at 10 days after transection, and PN-1, RPL9 and prosaposin increased in the distal stump at 5 days after transection. Among these proteins, aFGF, GAP-43, PN-1 and prosaposin were found to be associated with nerve regeneration. CONCLUSION We demonstrated that aFGF, GAP-43, PN-1 and prosaposin expression increased at specific stages and in specific sites, such as the proximal or distal stump, after nerve transection by comprehensive measurement using proteomics analysis. We believe that these specific expression patterns might play important roles during regeneration after nerve injury.
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Affiliation(s)
- Hikono Aiki
- Department of Biomedical Engineering, Sapporo Medical University School of Medicine, Sapporo, Japan; Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takuro Wada
- Division of Orthopaedic Surgery, Saiseikai Otaru Hospital, Otaru, Japan
| | - Kousuke Iba
- Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan.
| | - Gosuke Oki
- Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Hitoshi Sohma
- Department of Educational Development, Sapporo Medical University Center for Medical Education, Sapporo, Japan
| | - Toshihiko Yamashita
- Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Yasuo Kokai
- Department of Biomedical Engineering, Sapporo Medical University School of Medicine, Sapporo, Japan
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Yvon A, Faroni A, Reid AJ, Lees VC. Selective Fiber Degeneration in the Peripheral Nerve of a Patient With Severe Complex Regional Pain Syndrome. Front Neurosci 2018; 12:207. [PMID: 29670505 PMCID: PMC5893835 DOI: 10.3389/fnins.2018.00207] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 03/15/2018] [Indexed: 02/04/2023] Open
Abstract
Aims: Complex regional pain syndrome (CRPS) is characterized by chronic debilitating pain disproportional to the inciting event and accompanied by motor, sensory, and autonomic disturbances. The pathophysiology of CRPS remains elusive. An exceptional case of severe CRPS leading to forearm amputation provided the opportunity to examine nerve histopathological features of the peripheral nerves. Methods: A 35-year-old female developed CRPS secondary to low voltage electrical injury. The CRPS was refractory to medical therapy and led to functional loss of the forelimb, repeated cutaneous wound infections leading to hospitalization. Specifically, the patient had exhausted a targeted conservative pain management programme prior to forearm amputation. Radial, median, and ulnar nerve specimens were obtained from the amputated limb and analyzed by light and transmission electron microscopy (TEM). Results: All samples showed features of selective myelinated nerve fiber degeneration (47–58% of fibers) on electron microscopy. Degenerating myelinated fibers were significantly larger than healthy fibers (p < 0.05), and corresponded to the larger Aα fibers (motor/proprioception) whilst smaller Aδ (pain/temperature) fibers were spared. Groups of small unmyelinated C fibers (Remak bundles) also showed evidence of degeneration in all samples. Conclusions: We are the first to show large fiber degeneration in CRPS using TEM. Degeneration of Aα fibers may lead to an imbalance in nerve signaling, inappropriately triggering the smaller healthy Aδ fibers, which transmit pain and temperature. These findings suggest peripheral nerve degeneration may play a key role in CRPS. Improved knowledge of pathogenesis will help develop more targeted treatments.
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Affiliation(s)
- Adrien Yvon
- Nottingham University Hospitals, Nottingham, United Kingdom.,Blond McIndoe Laboratories, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology Medicine and Health, Manchester Academic Health Science Centre, School of Biological Sciences, University of Manchester, Manchester, United Kingdom
| | - Alessandro Faroni
- Blond McIndoe Laboratories, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology Medicine and Health, Manchester Academic Health Science Centre, School of Biological Sciences, University of Manchester, Manchester, United Kingdom
| | - Adam J Reid
- Blond McIndoe Laboratories, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology Medicine and Health, Manchester Academic Health Science Centre, School of Biological Sciences, University of Manchester, Manchester, United Kingdom.,Department of Plastic Surgery & Burns, Manchester Academic Health Science Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, United Kingdom
| | - Vivien C Lees
- Department of Plastic Surgery & Burns, Manchester Academic Health Science Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, United Kingdom
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Berta T, Perrin FE, Pertin M, Tonello R, Liu YC, Chamessian A, Kato AC, Ji RR, Decosterd I. Gene Expression Profiling of Cutaneous Injured and Non-Injured Nociceptors in SNI Animal Model of Neuropathic Pain. Sci Rep 2017; 7:9367. [PMID: 28839165 PMCID: PMC5570923 DOI: 10.1038/s41598-017-08865-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 07/17/2017] [Indexed: 12/12/2022] Open
Abstract
Nociceptors are a particular subtype of dorsal root ganglion (DRG) neurons that detect noxious stimuli and elicit pain. Although recent efforts have been made to reveal the molecular profile of nociceptors in normal conditions, little is known about how this profile changes in pathological conditions. In this study we exploited laser capture microdissection to specifically collect individual injured and non-injured nociceptive DRG neurons and to define their gene profiling in rat spared nerve injury (SNI) model of neuropathic pain. We found minimal transcriptional changes in non-injured neurons at 7 days after SNI. In contrast, several novel transcripts were altered in injured nociceptors, and the global signature of these LCM-captured neurons differed markedly from that the gene expression patterns found previously using whole DRG tissue following SNI. Pathway analysis of the transcriptomic profile of the injured nociceptors revealed oxidative stress as a key biological process. We validated the increase of caspase-6 (CASP6) in small-sized DRG neurons and its functional role in SNI- and paclitaxel-induced neuropathic pain. Our results demonstrate that the identification of gene regulation in a specific population of DRG neurons (e.g., nociceptors) is an effective strategy to reveal new mechanisms and therapeutic targets for neuropathic pain from different origins.
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Affiliation(s)
- Temugin Berta
- Pain Center, Department of anesthesiology, Lausanne University Hospital (CHUV) and Faculty of biology and medicine (FBM), University of Lausanne (UNIL), 1011, Lausanne, Switzerland.
- Department of Anesthesiology, Duke University Medical Center, 595 LaSalle Street, Durham, NC, 27710, USA.
- Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio, 45267, USA.
| | - Florence E Perrin
- Department of Basic Neuroscience, Faculty of Medicine, 1211, Geneva 4, Geneva, Switzerland
- University of Montpellier, Montpellier, F-34095 France, INSERM, U1198, Montpellier, F-34095 France, EPHE, Paris, F-75014, France
| | - Marie Pertin
- Pain Center, Department of anesthesiology, Lausanne University Hospital (CHUV) and Faculty of biology and medicine (FBM), University of Lausanne (UNIL), 1011, Lausanne, Switzerland
- Department of Fundamental Neurosciences, Faculty of biology and medicine (FBM), University of Lausanne (UNIL), 1005, Lausanne, Switzerland
| | - Raquel Tonello
- Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio, 45267, USA
| | - Yen-Chin Liu
- Department of Anesthesiology, College of Medicine, National Cheng Kung University, Tainan city, Taiwan
| | - Alexander Chamessian
- Department of Anesthesiology, Duke University Medical Center, 595 LaSalle Street, Durham, NC, 27710, USA
| | - Ann C Kato
- Department of Basic Neuroscience, Faculty of Medicine, 1211, Geneva 4, Geneva, Switzerland
| | - Ru-Rong Ji
- Department of Anesthesiology, Duke University Medical Center, 595 LaSalle Street, Durham, NC, 27710, USA
| | - Isabelle Decosterd
- Pain Center, Department of anesthesiology, Lausanne University Hospital (CHUV) and Faculty of biology and medicine (FBM), University of Lausanne (UNIL), 1011, Lausanne, Switzerland
- Department of Fundamental Neurosciences, Faculty of biology and medicine (FBM), University of Lausanne (UNIL), 1005, Lausanne, Switzerland
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13
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König S, Schlereth T, Birklein F. Molecular signature of complex regional pain syndrome (CRPS) and its analysis. Expert Rev Proteomics 2017; 14:857-867. [DOI: 10.1080/14789450.2017.1366859] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Simone König
- Core Unit Proteomics, Interdisciplinary Center for Clinical Research, University of Münster, Münster, Germany
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14
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Abstract
Although animal models of pain have brought invaluable information on basic processes underlying pain pathophysiology, translation to humans is a problem. This Review will summarize what information has been gained by the direct study of patients with chronic pain. The techniques discussed range from patient phenotyping using quantitative sensory testing to specialized nociceptor neurophysiology, imaging methods of peripheral nociceptors, analyses of body fluids, genetics and epigenetics, and the generation of sensory neurons from patients via inducible pluripotent stem cells.
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Affiliation(s)
- Claudia Sommer
- Department of Neurology, University of Würzburg, Josef-Schneider-Straße 11, D-97080 Würzburg, Germany.
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15
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Moore DM, McCrory C. The Proteomics of Intrathecal Analgesic agents for Chronic Pain. Curr Neuropharmacol 2017; 15:198-205. [PMID: 26907496 PMCID: PMC5412698 DOI: 10.2174/1570159x14666160224124446] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 08/21/2015] [Accepted: 08/28/2015] [Indexed: 12/19/2022] Open
Abstract
Chronic pain remains a challenging clinical problem with a growing socio-economic burden for the state. Its prevalence is high and many of the patients are of work age. Our knowledge regarding the pathophysiology of chronic pain is poor. The consensus view is that the central nervous system plays a key role in the persistence of pain after an initiating event has long ceased. However the specifics of this biological response to an initiating event remains unclear. There is a growing body of evidence to support the concept that a central neuroimmune response is initiated and a number of small peptides have been implicated in this process following cerebrospinal fluid analysis in patients with chronic pain. This central biosynthetic peptide response leads to a process called central sensitization. Therapy is aimed at modulating and even inhibiting this response. However current pharmacological therapeutic options are limited in efficacy with significant deleterious side effect profiles. Proteomic studies extend single molecule analysis by identifying the components of biological networks and pathways and defining their interactions. This tool offers the potential to provide a molecular overview of the biological processes involved in chronic pain. It will also facilitate examination of gene-drug interactions. This technique offers a mechanism of defining the central biological responses that result in chronic pain and this information may facilitate the development of better therapies.
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16
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Gomez-Varela D, Schmidt M. Exploring novel paths towards protein signatures of chronic pain. Mol Pain 2016; 12:12/0/1744806916679658. [PMID: 27920228 PMCID: PMC5153021 DOI: 10.1177/1744806916679658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/01/2016] [Accepted: 10/13/2016] [Indexed: 12/15/2022] Open
Abstract
Pain is a major symptom of many medical conditions and the worldwide number one reason for people to seek medical assistance. It affects the quality of life of patients and poses a heavy financial burden on society with high costs of treatment and lost productivity. Furthermore, the treatment of chronic pain presents a big challenge as pain therapeutics often lack efficacy and exhibit minimal safety profiles. The latter can be largely attributed to the fact that current therapies target molecules with key physiological functions throughout the body. In light of these difficulties, the identification of proteins specifically involved in chronic pain states is of paramount importance for designing selective interventions. Several profiling efforts have been employed with the aim to dissect the molecular underpinnings of chronic pain, both on the level of the transcriptome and proteome. However, generated results are often inconsistent and non-overlapping, which is largely due to inherent technical constraints. A potential solution may be offered by emerging strategies capable of performing standardized and reproducible proteome analysis, such as data-independent acquisition-mass spectrometry (DIA-MS). We have recently demonstrated the applicability of DIA-MS to interrogate chronic pain-related proteome alterations in mice. Based on our results, we aim to provide an overview on DIA-MS and its potential to contribute to the comprehensive characterization of molecular signatures underlying pain pathologies.
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Affiliation(s)
| | - Manuela Schmidt
- Max-Planck Institute of Experimental Medicine, Göttingen, Germany
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17
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Multivariate modeling of proteins related to trapezius myalgia, a comparative study of female cleaners with or without pain. PLoS One 2013; 8:e73285. [PMID: 24023854 PMCID: PMC3762788 DOI: 10.1371/journal.pone.0073285] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 07/19/2013] [Indexed: 12/01/2022] Open
Abstract
The prevalence of chronic trapezius myalgia is high in women with high exposure to awkward working positions, repetitive movements and movements with high precision demands. The mechanisms behind chronic trapezius myalgia are not fully understood. The purpose of this study was to explore the differences in protein content between healthy and myalgic trapezius muscle using proteomics. Muscle biopsies from 12 female cleaners with work-related trapezius myalgia and 12 pain free female cleaners were obtained from the descending part of the trapezius. Proteins were separated with two-dimensional differential gel electrophoresis (2D-DIGE) and selected proteins were identified with mass spectrometry. In order to discriminate the two groups, quantified proteins were fitted to a multivariate analysis: partial least square discriminate analysis. The model separated 28 unique proteins which were related to glycolysis, the tricaboxylic acid cycle, to the contractile apparatus, the cytoskeleton and to acute response proteins. The results suggest altered metabolism, a higher abundance of proteins related to inflammation in myalgic cleaners compared to healthy, and a possible alteration of the contractile apparatus. This explorative proteomic screening of proteins related to chronic pain in the trapezius muscle provides new important aspects of the pathophysiology behind chronic trapezius myalgia.
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18
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Kwon A, Jeon SM, Hwang SH, Kim JH, Cho HJ. Expression and functional role of metallothioneins I and II in the spinal cord in inflammatory and neuropathic pain models. Brain Res 2013; 1523:37-48. [PMID: 23726995 DOI: 10.1016/j.brainres.2013.05.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 04/19/2013] [Accepted: 05/21/2013] [Indexed: 11/19/2022]
Abstract
In this study, the expression and functional role of metallothioneins I and II (MT-I/II) were evaluated in the spinal cord in rat models of inflammatory and neuropathic pain. Complete Freund's adjuvant (CFA) injection into the hindpaw induced an increase in MT-I/II protein expression in bilateral dorsal and ventral horns throughout the spinal cord, while chronic constriction injury (CCI) of the sciatic nerve induced an increase in MT-I/II expression in the ipsilateral dorsal and ventral horns of the lower lumbar spinal cord. Increased MT-I/II immunoreactivity was predominantly localized to vascular endothelial cells. CFA injection- and CCI-induced MT-I/II expression was inhibited by intrathecal administration of MT-I siRNA. Treatment with MT-I siRNA before CFA injection or at early time points after CCI resulted in a significant attenuation of mechanical allodynia and thermal hyperalgesia, while treatment at later time points had no effect on established pain behaviors. Our results suggest that endogenous MT-I/II might play an important role in the pathogenesis of pain behaviors, participating in the initiation of inflammatory and neuropathic pain rather than in their maintenance.
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Affiliation(s)
- Aram Kwon
- Department of Anatomy, School of Medicine, Kyungpook National University, 2-101, Dongin Dong, Daegu 702-422, South Korea
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19
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Effects of Antiepileptic Drugs on Antioxidant and Oxidant Molecular Pathways: Focus on Trace Elements. Cell Mol Neurobiol 2013; 33:589-99. [DOI: 10.1007/s10571-013-9936-5] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Accepted: 03/27/2013] [Indexed: 11/26/2022]
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20
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Poree L, Krames E, Pope J, Deer TR, Levy R, Schultz L. Spinal cord stimulation as treatment for complex regional pain syndrome should be considered earlier than last resort therapy. Neuromodulation 2013; 16:125-41. [PMID: 23441988 DOI: 10.1111/ner.12035] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 10/30/2012] [Accepted: 11/26/2012] [Indexed: 02/03/2023]
Abstract
BACKGROUND Spinal cord stimulation (SCS), by virtue of its historically described up-front costs and level of invasiveness, has been relegated by several complex regional pain syndrome (CRPS) treatment algorithms to a therapy of last resort. Newer information regarding safety, cost, and efficacy leads us to believe that SCS for the treatment of CRPS should be implemented earlier in a treatment algorithm using a more comprehensive approach. METHODS We reviewed the literature on pain care algorithmic thinking and applied the safety, appropriateness, fiscal or cost neutrality, and efficacy (S.A.F.E.) principles to establish an appropriate position for SCS in an algorithm of pain care. RESULTS AND CONCLUSION Based on literature-contingent considerations of safety, efficacy, cost efficacy, and cost neutrality, we conclude that SCS should not be considered a therapy of last resort for CRPS but rather should be applied earlier (e.g., three months) as soon as more conservative therapies have failed.
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Affiliation(s)
- Lawrence Poree
- Department of Anesthesiology, University of California San Francisco, San Francisco, CA, USA
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21
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Olausson P, Gerdle B, Ghafouri N, Larsson B, Ghafouri B. Identification of proteins from interstitium of trapezius muscle in women with chronic myalgia using microdialysis in combination with proteomics. PLoS One 2012; 7:e52560. [PMID: 23300707 PMCID: PMC3531451 DOI: 10.1371/journal.pone.0052560] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 11/16/2012] [Indexed: 01/30/2023] Open
Abstract
Background Microdialysis (MD) of the trapezius muscle has been an attractive technique to investigating small molecules and metabolites in chronic musculoskeletal pain in human. Large biomolecules such as proteins also cross the dialysis membrane of the catheters. In this study we have applied in vivo MD in combination with two dimensional gel electrophoresis (2-DE) and mass spectrometry to identify proteins in the extracellular fluid of the trapezius muscle. Materials and Methods Dialysate from women with chronic trapezius myalgia (TM; n = 37), women with chronic wide spread pain (CWP; n = 18) and healthy controls (CON; n = 22) was collected from the trapezius muscle using a catheter with a cut-off point of 100 kDa. Proteins were separated by two-dimensional gel electrophoresis and visualized by silver staining. Detected proteins were identified by nano liquid chromatography in combination with tandem mass spectrometry. Results Ninety-seven protein spots were identified from the interstitial fluid of the trapezius muscle; 48 proteins in TM and 30 proteins in CWP had concentrations at least two-fold higher or lower than in CON. The identified proteins pertain to several functional classes, e.g., proteins involved in inflammatory responses. Several of the identified proteins are known to be involved in processes of pain such as: creatine kinase, nerve growth factor, carbonic anhydrase, myoglobin, fatty acid binding protein and actin aortic smooth muscle. Conclusions In this study, by using in vivo microdialysis in combination with proteomics a large number of proteins in muscle interstitium have been identified. Several of the identified proteins were at least two-fold higher or lower in chronic pain patients. The applied techniques open up for the possibility of investigating protein changes associated with nociceptive processes of chronic myalgia.
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Affiliation(s)
- Patrik Olausson
- Rehabilitation Medicine, Department of Medicine and Health Sciences, Faculty of Health Sciences, University of Linköping and Pain- and Rehabilitation Centre, County Council, Linköping, Sweden
| | - Björn Gerdle
- Rehabilitation Medicine, Department of Medicine and Health Sciences, Faculty of Health Sciences, University of Linköping and Pain- and Rehabilitation Centre, County Council, Linköping, Sweden
| | - Nazdar Ghafouri
- Rehabilitation Medicine, Department of Medicine and Health Sciences, Faculty of Health Sciences, University of Linköping and Pain- and Rehabilitation Centre, County Council, Linköping, Sweden
- Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå, Sweden
| | - Britt Larsson
- Rehabilitation Medicine, Department of Medicine and Health Sciences, Faculty of Health Sciences, University of Linköping and Pain- and Rehabilitation Centre, County Council, Linköping, Sweden
| | - Bijar Ghafouri
- Rehabilitation Medicine, Department of Medicine and Health Sciences, Faculty of Health Sciences, University of Linköping and Pain- and Rehabilitation Centre, County Council, Linköping, Sweden
- Occupational and Environmental Medicine, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University and Centre of Occupational and Environmental Medicine, County Council, Linköping, Sweden
- * E-mail:
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22
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Antunes-Martins A, Perkins JR, Lees J, Hildebrandt T, Orengo C, Bennett DLH. Systems biology approaches to finding novel pain mediators. WILEY INTERDISCIPLINARY REVIEWS-SYSTEMS BIOLOGY AND MEDICINE 2012; 5:11-35. [PMID: 23059966 DOI: 10.1002/wsbm.1192] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chronic pain represents a major health burden; this maladaptive pain state occurs as a consequence of hypersensitivity within the peripheral and central components of the somatosensory system. High throughput technologies (genomics, transciptomics, lipidomics, and proteomics) are now being applied to tissue derived from pain patients as well as experimental pain models to discover novel pain mediators. The use of clustering, meta-analysis and other techniques can help refine potential candidates. Of particular importance are systems biology methods, such as co-expression network generating algorithms, which infer potential associations/interactions between molecules and build networks based on these interactions. Protein-protein interaction networks allow the lists of potential targets generated by these different platforms to be analyzed in their biological context. Outputs from these different methods must also be related to the clinical pain phenotype. The improved and standardized phenotyping of pain symptoms and sensory signs enables much better subject stratification. Our hope is that, in the future, the use of computational approaches to integrate datasets including sensory phenotype as well as the outputs of high throughput technologies will help define novel pain mediators and provide insights into the pathogenesis of chronic pain.
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Affiliation(s)
- Ana Antunes-Martins
- The Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London, UK
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23
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Mogil JS. Pain genetics: past, present and future. Trends Genet 2012; 28:258-66. [PMID: 22464640 DOI: 10.1016/j.tig.2012.02.004] [Citation(s) in RCA: 223] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 02/16/2012] [Accepted: 02/22/2012] [Indexed: 01/01/2023]
Abstract
Chronic pain is a classic example of gene × environment interaction: inflammatory and/or nerve injuries are known or suspected to be the etiology of most chronic pain syndromes, but only a small minority of those subjected to such injuries actually develop chronic pain. Once chronic pain has developed, pain severity and analgesic response are also highly variable among individuals. Although animal genetics studies have been ongoing for over two decades, only recently have comprehensive human twin studies and large-scale association studies been performed. Here, I review recent and accelerating progress in, and continuing challenges to, the identification of genes contributing to such variability. Success in this endeavor will hopefully lead to both better management of pain using currently available therapies and the development and/or prioritizing of new ones.
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Affiliation(s)
- Jeffrey S Mogil
- Department of Psychology, McGill University, Montreal, QC, H3A 1B1, Canada.
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24
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Pain's peptide signature. Pain 2012; 153:509-510. [PMID: 22264678 DOI: 10.1016/j.pain.2012.01.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 11/29/2011] [Accepted: 01/06/2012] [Indexed: 11/22/2022]
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