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Condition: Pain

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Total 374 results found since Jan 2013.

CaMKIIα underlies spontaneous and evoked pain behaviors in Berkeley sickle cell transgenic mice
This study aimed to investigate the functional involvement of Ca2+/calmodulin-dependent protein kinase II (CaMKIIα) in the persistent and refractory pain associated with SCD. We found that nonevoked ongoing pain as well as evoked hypersensitivity to mechanical and thermal stimuli were present in Berkeley sickle cell transgenic mice (BERK mice), but not nonsickle control littermates. Prominent activation of CaMKIIα was observed in the dorsal root ganglia and spinal cord dorsal horn region of BERK mice. Intrathecal administration of KN93, a selective inhibitor of CaMKII, significantly attenuated mechanical allodynia and he...
Source: Pain - November 22, 2016 Category: Anesthesiology Tags: Research Paper Source Type: research

Neuronal Fc-epsilon receptor I contributes to antigen-evoked pruritus in a murine model of ocular allergy.
This study may suggest a novel mechanism for the development of pathological itch in allergic diseases. PMID: 27865948 [PubMed - as supplied by publisher]
Source: Brain, Behavior, and Immunity - November 15, 2016 Category: Neurology Authors: Liu F, Xu L, Chen N, Zhou M, Li C, Yang Q, Xie Y, Huang Y, Ma C Tags: Brain Behav Immun Source Type: research

More iFect in-vivo
The parade of publications continues to grow.Here researchers use our i-FectTM Transfection Kit for delivering sh-IRF3in vivo:Rui Li, Li-guo Wang, Qi Wang, Zhi-hua Li, Ya-li Ma, Qing-Duo Guo. Silencing of IRF3 alleviates chronic neuropathic pain following chronic constriction injury. doi.org/10.1016/j.biopha.2017.01.085... The oligonucleotides for sh-IRF3 were: 5 ′-CACCGCGTCTAGGCTGGTGGTTATTCGAAAATAACCACCAGCCTAGACGC-3′ −3′. Then, 10 μg sh-IRF3 dissolved in 30 μl i-Fect transfection reagent (Neuromics, Edina, MN, USA) was administered intrathecally once daily for 7...Fig. Down-regulation of IRF3 attenuated mechanic...
Source: siRNA and DsiRNA Transfection Efficiency - January 30, 2017 Category: Neuroscience Tags: iFect IFR3 inflammatory pain Source Type: news

Cynandione A attenuates neuropathic pain through p38 β MAPK-mediated spinal microglial expression of β-endorphin
This study aims to evaluate the antihypersensitivity activities of cynandione A in neuropathy and explored its mechanisms of action. Intrathecal injection of cynandione A dose-dependently attenuated spinal nerve ligation-induced mechanical allodynia and thermal hyperalgesia, with maximal possible effects of 57% and 59%, ED50s of 14.9 μg and 6.5 μg, respectively. Intrathecal injection of cynandione A significantly increased β-endorphin levels in spinal cords of neuropathic rats and its treatment concentration-dependently induced β-endorphin expression in cultured primary microglia (but not in neurons or astrocytes), wit...
Source: Brain, Behavior, and Immunity - February 8, 2017 Category: Neurology Source Type: research

Activation of NPFFR2 leads to hyperalgesia through the spinal inflammatory mediator CGRP in mice.
Abstract Neuropeptide FF (NPFF) is recognized as an opioid modulating peptide that regulates morphine-induced analgesia. The aim of this study was to delineate the role of NPFFR2 in pain transmission. We found the expression levels of NPFF and NPFFR2 were increased in the lumbar dorsal horn of animals with CFA- and carrageenan-induced inflammation and both NPFFR2 over-expressing transgenic (NPFFR2-Tg) and NPFFR2 agonist-treated mice displayed hyperalgesia. BOLD signals from functional MRI showed that NPFFR2-Tg mice exhibited increased activation of pain-related brain regions after painful stimulation when compared...
Source: Experimental Neurology - February 4, 2017 Category: Neurology Authors: Lin YT, Liu HL, Day YJ, Chang CC, Hsu PH, Chen JC Tags: Exp Neurol Source Type: research

Cynandione A attenuates neuropathic pain through p38 β MAPK-mediated spinal microglial expression of β-endorphin.
This study aims to evaluate the antihypersensitivity activities of cynandione A in neuropathy and explored its mechanisms of action. Intrathecal injection of cynandione A dose-dependently attenuated spinal nerve ligation-induced mechanical allodynia and thermal hyperalgesia, with maximal possible effects of 57% and 59%, ED50s of 14.9 μg and 6.5 μg, respectively. Intrathecal injection of cynandione A significantly increased β-endorphin levels in spinal cords of neuropathic rats and its treatment concentration-dependently induced β-endorphin expression in cultured primary microglia (but not in neurons or astrocytes), wit...
Source: Brain, Behavior, and Immunity - February 7, 2017 Category: Neurology Authors: Huang Q, Mao XF, Wu HY, Liu H, Sun ML, Wang X, Wang YX Tags: Brain Behav Immun Source Type: research

Epigenetic upregulation of CXCL12 expression mediates antitubulin chemotherapeutics–induced neuropathic pain
Abstract: Clinically, Microtubule-targeted agents–induced neuropathic pain hampers chemotherapeutics for patients with cancer. Here, we found that application of paclitaxel or vincristine increased the protein and mRNA expression of CXCL12 and frequency and amplitude of miniature excitatory post synaptic currents (mEPSCs) in spinal dorsal horn neurons. Spinal local application of CXCL12 induced the long-term potentiation of nociceptive synaptic transmission and increased the amplitude of mEPSCs. Inhibition of CXCL12 using the transgenic mice (CXCL12−/+) or neutralizing antibody or siRNA ameliorated the mEPSC's enhancem...
Source: Pain - March 25, 2017 Category: Anesthesiology Tags: Research Paper Source Type: research

Identification of a signaling cascade that maintains constitutive {delta}-opioid receptor incompetence in peripheral sensory neurons Signal Transduction
μ-Opioid receptor (MOR) agonists are often used to treat severe pain but can result in adverse side effects. To circumvent systemic side effects, targeting peripheral opioid receptors is an attractive alternative treatment for severe pain. Activation of the δ-opioid receptor (DOR) produces similar analgesia with reduced side effects. However, until primed by inflammation, peripheral DOR is analgesically incompetent, raising interest in the mechanism. We recently identified a novel role for G-protein-coupled receptor kinase 2 (GRK2) that renders DOR analgesically incompetent at the plasma membrane. However, the mechanism ...
Source: Journal of Biological Chemistry - May 26, 2017 Category: Chemistry Authors: Allison Doyle Brackley, Shayda Sarrami, Ruben Gomez, Kristi A. Guerrero, Nathaniel A. Jeske Tags: Neurobiology Source Type: research

Recent Advances in the Development of T ‐type Calcium Channel Blockers for Pain Intervention
Abstract Cav3.2 T‐type calcium channels are important regulators of pain signals in afferent pain pathway, and their activities are dysregulated during various chronic pain states. Therefore it stands to reason that inhibiting T‐type calcium channels in dorsal root ganglion neurons and in the spinal dorsal horn can be targeted for pain relief. This is supported by early pharmacological studies with T‐type channel blockers such as ethosuximide, and by analgesic effects of siRNA depletion of Cav3.2 channels. In the past five years, considerable effort has been applied towards identifying novel classes of T‐type calci...
Source: British Journal of Pharmacology - June 13, 2017 Category: Drugs & Pharmacology Authors: Terrance P Snutch, Gerald W Zamponi Tags: REVIEW ARTICLE THEMED ISSUE Source Type: research

Silencing of FKBP51 alleviates the mechanical pain threshold, inhibits DRG inflammatory factors and pain mediators through the NF-kappaB signaling pathway.
Abstract Neuropathic pain is chronic pain caused by lesions or diseases of the somatosensory system, currently available analgesics provide only temporal relief. The precise role of FK506 binding protein 51 (FKBP51) in neuropathic pain induced by chronic constriction injury (CCI) is not clear. The purpose of the present study was to investigate the effects and possible mechanisms of FKBP51 in neuropathic pain in the rat model of CCI. Our results showed that FKBP51 was obviously upregulated in a time-dependent manner in the dorsal root ganglion (DRG) in CCI rats. Additionally, silencing of FKBP51 remarkably attenua...
Source: Gene - June 16, 2017 Category: Genetics & Stem Cells Authors: Yu HM, Wang Q, Sun WB Tags: Gene Source Type: research

MiR-210 facilitates ECM degradation by suppressing autophagy via silencing of ATG7 in human degenerated NP cells
Publication date: September 2017 Source:Biomedicine & Pharmacotherapy, Volume 93 Author(s): Cheng Wang, Zi-Zhen Zhang, Wei Yang, Zhi-Hua Ouyang, Jing-Bo Xue, Xue-Lin Li, Jian Zhang, Wen-Kang Chen, Yi-Guo Yan, Wen-Jun Wang Intervertebral disc degeneration (IDD) is thought to be the most common cause of low back pain. Dysregulation of microRNAs (miRNAs) is involved in the development of IDD. The aim of this study was to explore the influence of miR-210 on type II collagen (Col II) and aggrecan expression and possible mechanisms in human degenerated nucleus pulposus (NP) cells. Our results showed that miR-210 levels ...
Source: Biomedicine and Pharmacotherapy - June 29, 2017 Category: Drugs & Pharmacology Source Type: research

MiR-210 facilitates ECM degradation by suppressing autophagy via silencing of ATG7 in human degenerated NP cells.
Abstract Intervertebral disc degeneration (IDD) is thought to be the most common cause of low back pain. Dysregulation of microRNAs (miRNAs) is involved in the development of IDD. The aim of this study was to explore the influence of miR-210 on type II collagen (Col II) and aggrecan expression and possible mechanisms in human degenerated nucleus pulposus (NP) cells. Our results showed that miR-210 levels were significantly increased in degenerated NP tissues compared with healthy controls, and positively correlated with disc degeneration grade. By gain-of-function and loss-of-function studies in human degenerated ...
Source: Biomedicine and pharmacotherapy = Biomedecine and pharmacotherapie - June 28, 2017 Category: Drugs & Pharmacology Authors: Wang C, Zhang ZZ, Yang W, Ouyang ZH, Xue JB, Li XL, Zhang J, Chen WK, Yan YG, Wang WJ Tags: Biomed Pharmacother Source Type: research

Vimentin Promotes Astrocyte Activation After Chronic Constriction Injury
In this study, the role of vimentin in chronic constriction injury (CCI) was investigated. Western blot revealed increased protein level of vimentin following CCI, peaking at 7  days. Double immunofluorescent staining showed that vimentin was mostly co-localized with astrocytes, not with neurons or microglia. In vitro, sensory neuronal injury stimulated astrocytes to produce more pro-inflammation cytokines, p-ERK (phosphorylated extracellular signal-regulated protein kina se), and vimentin. However, vimentin knockdown by siRNA (small interfering RNA) reversed the upregulation of p-ERK and vimentin expression and reduced t...
Source: Journal of Molecular Neuroscience - August 8, 2017 Category: Neuroscience Source Type: research

Melatonin protects chondrocytes from impairment induced by glucocorticoids via NAD+-dependent SIRT1
Publication date: Available online 10 August 2017 Source:Steroids Author(s): Wei Yang, Xiaomin Kang, Na Qin, Feng Li, Xinxin Jin, Zhengmin Ma, Zhuang Qian, Shufang Wu Intra-articular injection of glucocorticoids is used to relieve pain and inflammation in osteoarthritis patients, which is occasionally accompanied with the serious side effects of glucocorticoids in collagen-producing tissue. Melatonin is the major hormone released from the pineal gland and its beneficial effects on cartilage has been suggested. In the present study, we investigated the protective role of melatonin on matrix degeneration in chondrocytes ind...
Source: Steroids - August 10, 2017 Category: Drugs & Pharmacology Source Type: research

Downregulations of TRPM8 expression and membrane trafficking in dorsal root ganglion mediate the attenuation of cold hyperalgesia in CCI rats induced by GFR α3 knockdown.
CONCLUSION: Our results demonstrate that GFRα3 knockdown specially inhibits cold hyperalgesia following CCI via decreasing the expression level and plasma membrane trafficking of TRPM8 in DRG. GFRα3 and its downstream mediator, TRPM8, represent a new analgesia axis which can be further exploited in sensitized cold reflex under the condition of chronic pain. PMID: 28867384 [PubMed - as supplied by publisher]
Source: Brain Research Bulletin - August 31, 2017 Category: Neurology Authors: Su L, Shu R, Song C, Yu Y, Wang G, Li Y, Liu C Tags: Brain Res Bull Source Type: research