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Condition: Pain

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Total 374 results found since Jan 2013.

Cutaneous inflammation regulates THIK1 expression in small C-like nociceptor dorsal root ganglion neurons
In this study we aimed to identify the currently unknown DRG subpopulations expressing THIK1, and to investigate the relationship between the channel and both inflammatory and spontaneous pain in normal rats. Using a combination of immunohistochemistry, western blotting and behavioural tests, we found that all small neurons and large groups of medium and large DRG neurons express THIK1. Myelinated and unmyelinated fibers, nerve endings in the skin and lamina I and II of the spinal cord also express the channel. THIK1 staining co-localizes with IB4-binding and trkA suggesting that the channel is expressed by nociceptors. At...
Source: Molecular and Cellular Neuroscience - July 2, 2017 Category: Neuroscience Source Type: research

α7 nicotinic acetylcholine receptor in tumor-associated macrophages inhibits colorectal cancer metastasis through the JAK2/STAT3 signaling pathway.
Authors: Fei R, Zhang Y, Wang S, Xiang T, Chen W Abstract Considerable evidence has implied that α7 nicotinic receptor subtypes play an important role in chronic inflammatory and neuropathic pain signaling. The aim of the present study was to determine the role of endogenous α7nAChR signaling in tumor-associated macrophages (TAMs) in human colorectal cancer (CRC) metastasis and prognosis. α7nAChR expression in primary tumor cells and adjacent stroma cells especially in TAMs in 51 CRC patients was observed. Using a human monocyte THP-derived macrophages (TMs) with α7nAChR-siRNA knockdown (TMα7-/-) and a CRC ce...
Source: Oncology Reports - September 14, 2017 Category: Cancer & Oncology Tags: Oncol Rep Source Type: research

LncRNA NONRATT021972 Was Associated with Neuropathic Pain Scoring in Patients with Type 2 Diabetes.
CONCLUSION: LncRNA NONRATT021972 increased in type 2 diabetes and was positively associated with neuropathic pain scoring in type 2 diabetes. LncRNA NONRATT021972 exacerbated neuropathic pain via TNF-α related pathways. PMID: 28928602 [PubMed - in process]
Source: Behavioural Neurology - September 22, 2017 Category: Neurology Authors: Yu W, Zhao GQ, Cao RJ, Zhu ZH, Li K Tags: Behav Neurol Source Type: research

AKAP150 involved in Paclitaxel-Induced Neuropathic Pain via Inhibiting CN/NFAT2 pathway and downregulating IL-4.
In this study, we found that A-kinase anchor protein 150 (AKAP150) was significantly upregulated after paclitaxel injection. Inhibition of AKAP150 via siRNA or AKAP150(flox/flox) in rodents alleviated the pain behavior induced by paclitaxel, and partly restored the decreased calcineurin (CN) phosphatase activity after paclitaxel treatment. Paclitaxel decreased the expression of anti-inflammatory cytokine interleukin-4 (IL-4), and intrathecal injections of IL-4 effectively alleviated paclitaxel-induced hypersensitivity and the frequency of dorsal root ganglion (DRG) neurons action potential. The decreased CN enzyme activity...
Source: Brain, Behavior, and Immunity - October 19, 2017 Category: Neurology Authors: Nie B, Liu C, Bai X, Chen X, Wu S, Zhang S, Huang Z, Xie M, Xu T, Xin W, Zeng W, Ouyang H Tags: Brain Behav Immun Source Type: research

Downregulation of spinal astrocytic connexin43 leads to upregulation of interleukin ‐6 and cyclooxygenase‐2 and mechanical hypersensitivity in mice
Abstract Connexin43 (Cx43), involved in intercellular signaling, is expressed in spinal dorsal horn astrocytes and crucial in the maintenance of neuropathic pain. Downregulation of spinal astrocytic Cx43 in mice enhances glutamatergic neurotransmission by decreasing glutamate transporter GLT‐1 expression, resulting in cutaneous hypersensitivity. Decreased expression of astrocytic Cx43 could lead to altered expression of other nociceptive molecules. Transfection of Cx43‐targeting siRNA in cultured spinal astrocytes increased expression of the pronociceptive cytokine interleukin‐6 (IL‐6) and the prostaglandin synthes...
Source: Glia - November 6, 2017 Category: Neurology Authors: Norimitsu Morioka, Shiori Fujii, Syun Kondo, Fang Fang Zhang, Kazuki Miyauchi, Yoki Nakamura, Kazue Hisaoka ‐Nakashima, Yoshihiro Nakata Tags: RESEARCH ARTICLE Source Type: research

AKAP150 involved in paclitaxel-induced neuropathic pain via inhibiting CN/NFAT2 pathway and downregulating IL-4
In this study, we found that A-kinase anchor protein 150 (AKAP150) was significantly upregulated after paclitaxel injection. Inhibition of AKAP150 via siRNA or AKAP150flox/flox in rodents alleviated the pain behavior induced by paclitaxel, and partly restored the decreased calcineurin (CN) phosphatase activity after paclitaxel treatment. Paclitaxel decreased the expression of anti-inflammatory cytokine interleukin-4 (IL-4), and intrathecal injections of IL-4 effectively alleviated paclitaxel-induced hypersensitivity and the frequency of dorsal root ganglion (DRG) neurons action potential. The decreased CN enzyme activity, ...
Source: Brain, Behavior, and Immunity - January 11, 2018 Category: Neurology Source Type: research

Involvement of MrgprC in Electroacupuncture Analgesia for Attenuating CFA-Induced Thermal Hyperalgesia by Suppressing the TRPV1 Pathway.
This study aimed to investigate the involvement of MrgprC and its transient receptor potential vanilloid 1 (TRPV1) pathway in EA analgesia in chronic inflammatory pain. Chronic inflammatory pain was induced by subcutaneously injecting complete Freund's adjuvant (CFA) into the left hind paw. EA (2/100 Hz) stimulation was administered. MrgprC siRNAs were intrathecally administered to inhibit MrgprC expression, and bovine adrenal medulla 8-22 (BAM8-22) was used to activate MrgprC. The mechanical allodynia was decreased by EA significantly since day 3. The piled analgesic effect of EA was partially blocked by 6 intrathecal a...
Source: Evidence-based Complementary and Alternative Medicine - April 7, 2018 Category: Complementary Medicine Tags: Evid Based Complement Alternat Med Source Type: research

Increased Neuroligin 2 Levels in the Postsynaptic Membrane in Spinal Dorsal Horn may Contribute to Postoperative Pain
Publication date: 1 July 2018 Source:Neuroscience, Volume 382 Author(s): Ruijuan Guo, Huili Li, Xueyang Li, Yuqing Sun, Huihui Miao, Danxu Ma, Fangxiao Hong, Ye Zhang, Yun Guan, Junfa Li, Ming Tian, Yun Wang Neuroligin 2 is a synaptic cell adhesion molecule that is mainly located in inhibitory synapses and is crucial in the regulation of synapse function through protein–protein interactions. However, researchers have not clearly determined whether neuroligin 2 is involved in the development of postoperative pain. In the current study, Western blot, immunofluorescence staining and co-immunoprecipitation were used to exam...
Source: Neuroscience - May 7, 2018 Category: Neuroscience Source Type: research

Translocation Associated Membrane Protein 1 Contributes to Chronic Constriction Injury-Induced Neuropathic Pain in the Dorsal Root Ganglion and Spinal Cord in Rats
AbstractNeuropathic pain is a severe debilitating state caused by injury or dysfunction of somatosensory nervous system, and the clinical treatment is still challenging. Translocation associated membrane protein 1 (TRAM1), an adapter protein, participates in a variety of transduction pathways and mediates the biological functions such as cell proliferation, activation, and differentiation. However, whether TRAM1 is involved in the pathogenesis of neuropathic pain is still unclear. In our study, we reported the role of TRAM1 in the maintenance of neuropathic pain induced by chronic constriction injury (CCI) on rats. By west...
Source: Journal of Molecular Neuroscience - October 18, 2018 Category: Neuroscience Source Type: research

Lentiviral ‑mediated inducible silencing of TLR4 attenuates neuropathic pain in a rat model of chronic constriction injury.
In conclusion, TLR4 may serve a significant role in neuropathy and the results of the present study provide an inducible lentivirus‑mediated siRNA against TLR4 that may serve as a potential novel strategy to be applied in gene therapy for NP in the future. PMID: 30365084 [PubMed - as supplied by publisher]
Source: Molecular Medicine Reports - October 27, 2018 Category: Molecular Biology Tags: Mol Med Rep Source Type: research

Inhibition of TREM1 reduces inflammation and oxidative stress after spinal cord injury (SCI) associated with HO-1 expressions
Publication date: January 2019Source: Biomedicine & Pharmacotherapy, Volume 109Author(s): Zhenhuan Li, Furong Wu, Dafeng Xu, Zhongzheng Zhi, Guanghui XuAbstractSpinal cord injury (SCI) is a devastating event, leading to the progression of chronic neuropathic pain syndrome. Triggering receptor expressed on myeloid cells 1 (TREM1) is an innate immune receptor expressed on neutrophils and monocytes/macrophages. TREM1 enhances inflammatory response in various models of diseases, but its significance in SCI remains unclear. In the present study, we attempted to explore the effects of TREM1 on the regulation of SCI. Spinal cord ...
Source: Biomedicine and Pharmacotherapy - November 27, 2018 Category: Drugs & Pharmacology Source Type: research

Downregulated spinal IRF8 and BDNF in NAC are involved in neuropathic pain-induced depression relief via pulsed radiofrequency on dorsal root ganglion in rat SNI model.
This study was designed to explore the effect of PRF on DRG on the neuropathic pain-induced depression in rats with spared nerve injury (SNI). Here, we found that PRF on DRG or intrathecal injection of the interferon regulatory factor 8 (IRF8) siRNA prevented the increase of mechanical allodynia and depression-like behaviors of rats after receiving SNI. Meanwhile, Western blot, immunohistochemistry, and RT-PCR revealed that PRF on DRG or intrathecal injection of IRF8 siRNA inhibited IRF8 overexpression in the spinal cord and brain-derived neurotrophic factor (BDNF) in NAc. These results suggest that neuropathic pain-induce...
Source: Brain Research Bulletin - January 9, 2019 Category: Neurology Authors: Fang X, Xu X, Lin X, Liu R Tags: Brain Res Bull Source Type: research

Interleukin-1 Receptor Associated Kinase 1 Mediates the Maintenance of Neuropathic Pain after Chronic Constriction Injury in Rats.
Abstract Neuropathic pain (NP) has complicated pathogenesis as it mainly involves a lesion or dysfunction of the somatosensory nervous system and its clinical treatment remains challenging. Chronic constriction injury (CCI) model is a widely used neuropathic pain model and involved in mechanisms including both nerve inflammatory and injury. Cytokines and their receptors play essential roles in the occurrence and persistence of neuropathic pain, but the underlying mechanisms have not well been understood. Therefore, Interleukin-1 receptor-associated kinase 1 (IRAK1) is chosen to explore the possible mechanisms of N...
Source: Neurochemical Research - March 10, 2019 Category: Neuroscience Authors: Yin D, Chen Y, Li Y, Lu R, Wang B, Zhu S, Fan B, Xu Z Tags: Neurochem Res Source Type: research

Role of cannabinoid receptor 2 in mediating interleukin-1 β-induced inflammation in rheumatoid arthritis synovial fibroblasts.
CONCLUSIONS: Overall, our results indicate for the first time that CB2 mediates IL-1β-induced signalling pathways in RASFs and may serve as a potential target to manage pain and inflammation in RA. PMID: 30943136 [PubMed - as supplied by publisher]
Source: Clinical and Experimental Rheumatology - April 5, 2019 Category: Rheumatology Tags: Clin Exp Rheumatol Source Type: research

Cannabinoid Receptor 2 Agonist JWH-015 Inhibits Interleukin-1 β-Induced Inflammation in Rheumatoid Arthritis Synovial Fibroblasts and in Adjuvant Induced Arthritis Rat via Glucocorticoid Receptor
Management of pain in the treatment of rheumatoid arthritis (RA) is a priority that is not fully addressed by the conventional therapies. In the present study, we evaluated the efficacy of cannabinoid receptor 2 (CB2) agonist JWH-015 using RA synovial fibroblasts (RASFs) obtained from patients diagnosed with RA and in a rat adjuvant-induced arthritis (AIA) model of RA. Pretreatment of human RASFs with JWH-015 (10-20 µM) markedly inhibited the ability of pro-inflammatory cytokine interleukin-1β (IL-1β) to induce production of IL-6 and IL-8 and cellular expression of inflammatory cyclooxygenase-2 (COX-2). JWH-015 was effe...
Source: Frontiers in Immunology - May 7, 2019 Category: Allergy & Immunology Source Type: research