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https://www.readbyqxmd.com/read/28211895/electroacupuncture-attenuates-cfa-induced-inflammatory-pain-by-suppressing-nav1-8-through-s100b-trpv1-opioid-and-adenosine-pathways-in-mice
#1
Hsien-Yin Liao, Ching-Liang Hsieh, Chun-Ping Huang, Yi-Wen Lin
Pain is associated with several conditions, such as inflammation, that result from altered peripheral nerve properties. Electroacupuncture (EA) is a common Chinese clinical medical technology used for pain management. Using an inflammatory pain mouse model, we investigated the effects of EA on the regulation of neurons, microglia, and related molecules. Complete Freund's adjuvant (CFA) injections produced a significant mechanical and thermal hyperalgesia that was reversed by EA or a transient receptor potential V1 (TRPV1) gene deletion...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28195183/interleukin-1%C3%AE-pre-treated-bone-marrow-stromal-cells-alleviate-neuropathic-pain-through-ccl7-mediated-inhibition-of-microglial-activation-in-the-spinal-cord
#2
Jian Li, Guoying Deng, Haowei Wang, Mei Yang, Rui Yang, Xiangnan Li, Xiaoping Zhang, Hongbin Yuan
Although neuropathic pain is one of the most intractable diseases, recent studies indicate that systemic or local injection of bone marrow stromal cells (BMSCs) decreases pro-inflammatory cytokines release and alleviates neuropathic pain. However, it is still not clear whether pre-treated BMSCs have a strong anti-inflammatory and/or analgesia effect. Using the spinal nerve ligation model of neuropathic pain, IL-1β pre-treated BMSCs (IL-1β-BMSCs) were injected into rats followed by SNL in order to determine possible effects...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28192611/deficiency-of-trek-1-potassium-channel-exacerbates-secondary-injury-following-spinal-cord-injury-in-mice
#3
Yongkang Fang, Xiaojiang Huang, Yue Wan, Hao Tian, Yeye Tian, Wei Wang, Suiqiang Zhu, Minjie Xie
Spinal cord injury (SCI) involves complex pathological process which can be complicated by secondary injury. TREK-1 is a member of the two-pore domain potassium (K2P) channel family, which can be modulated by a number of physiological and pathological stimuli. Recent studies suggest that TREK-1 plays an active role in depression, pain and neuroprotection. However, its role in the pathological process after SCI remains unclear. In this study, we tested the expression and function of TREK-1 in spinal cord of mice after traumatic SCI...
February 13, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28192096/gabapentin-decreases-microglial-cells-and-reverses-bilateral-hyperalgesia-and-allodynia-in-rats-with-chronic-myositis
#4
A S Rosa, M F Freitas, I R C Rocha, M Chacur
In the present work, we investigated the antinociceptive effect of gabapentin in a chronic myositis model and its interference in spinal glial cells. Chronic myositis was induced by injection of Complete Freund Adjuvant (CFA) into the right gastrocnemius (GS) muscle of rats and tests for evaluating mechanical hyperalgesia, thermal hyperalgesia and tactile allodynia were performed. Pharmacological treatment with gabapentin was administrated intrathecally and 100ug and 200ug doses were tested. For analyzing astrocytes and microglia in the spinal cord, immunochemistry assay was performed...
February 10, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28186109/astragali-radix-could-it-be-an-adjuvant-for-oxaliplatin-induced-neuropathy
#5
Lorenzo Di Cesare Mannelli, Alessandra Pacini, Laura Micheli, Angelo Pietro Femia, Mario Maresca, Matteo Zanardelli, Alfredo Vannacci, Eugenia Gallo, Anna Rita Bilia, Giovanna Caderni, Fabio Firenzuoli, Alessandro Mugelli, Carla Ghelardini
Neurotoxicity is a major side effect of platinum derivatives both during and after treatment. In the absence of effective pharmacological compounds, the opportunity to identify safe adjuvant treatments among medicinal plants seems appropriate. Astragali radix is an adaptogenic herbal product recently analyzed in platinum-treated cancer patients. With the aim of evaluating the anti-neuropathic profile of Astragali radix, a previously characterized aqueous (Aqu) and two hydroalcoholic (20%HA and 50%HA) extracts were tested in a rat model of oxaliplatin-induced neuropathy...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28181986/local-administration-of-thiamine-ameliorates-ongoing-pain-in-a-rat-model-of-second-degree-burn
#6
Kangkang Zhang, Yali Pei, Zhihao Gan, Xuetao Zhang, Ye Duan, Yuepeng Liu, Wei Liu
The objective of this study was to develop rat model of second-degree burn pain and test analgesic efficacy of local thiamine administration. Automatic temperature-controlled hot plate was set at 85 ± 0.1°C with a filter paper on the top. Rats were thrust on hot plate landing on plantar surface for 4 to 7 and 10 seconds, respectively. Burnt skin was observed. Hematoxylin and eosin staining and Masson staining were used to monitor burn degree. Gait analysis detected change of locomotion. Allodynia and hyperalgesia in the burnt area were evaluated with von Frey test and Hargreaves Test, and ongoing pain was detected with conditional place preference test...
February 7, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28176234/frequent-mild-head-injury-promotes-trigeminal-sensitivity-concomitant-with-microglial-proliferation-astrocytosis-and-increased-neuropeptide-levels-in-the-trigeminal-pain-system
#7
Ashley L Tyburski, Lan Cheng, Soroush Assari, Kurosh Darvish, Melanie B Elliott
BACKGROUND: Frequent mild head injuries or concussion along with the presence of headache may contribute to the persistence of concussion symptoms. METHODS: In this study, the acute effects of recovery between mild head injuries and the frequency of injuries on a headache behavior, trigeminal allodynia, was assessed using von Frey testing up to one week after injury, while histopathological changes in the trigeminal pain pathway were evaluated using western blot, ELISA and immunohistochemistry...
December 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/28134928/blocking-microglial-pannexin-1-channels-alleviates-morphine-withdrawal-in-rodents
#8
Nicole E Burma, Robert P Bonin, Heather Leduc-Pessah, Corey Baimel, Zoe F Cairncross, Michael Mousseau, Jhenkruthi Vijaya Shankara, Patrick L Stemkowski, Dinara Baimoukhametova, Jaideep S Bains, Michael C Antle, Gerald W Zamponi, Catherine M Cahill, Stephanie L Borgland, Yves DeKoninck, Tuan Trang
Opiates are essential for treating pain, but termination of opiate therapy can cause a debilitating withdrawal syndrome in chronic users. To alleviate or avoid the aversive symptoms of withdrawal, many of these individuals continue to use opiates. Withdrawal is therefore a key determinant of opiate use in dependent individuals, yet its underlying mechanisms are poorly understood and effective therapies are lacking. Here, we identify the pannexin-1 (Panx1) channel as a therapeutic target in opiate withdrawal...
January 30, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28125674/characterisation-of-immune-and-neuroinflammatory-changes-associated-with-chemotherapy-induced-peripheral-neuropathy
#9
Preet G S Makker, Samuel S Duffy, Justin G Lees, Chamini J Perera, Ryan S Tonkin, Oleg Butovsky, Susanna B Park, David Goldstein, Gila Moalem-Taylor
Chemotherapy-induced peripheral neuropathy (CIPN) and associated neuropathic pain is a debilitating adverse effect of cancer treatment. Current understanding of the mechanisms underpinning CIPN is limited and there are no effective treatment strategies. In this study, we treated male C57BL/6J mice with 4 cycles of either Paclitaxel (PTX) or Oxaliplatin (OXA) over a week and tested pain hypersensitivity and changes in peripheral immune responses and neuroinflammation on days 7 and 13 post 1st injection. We found that both PTX and OXA caused significant mechanical allodynia...
2017: PloS One
https://www.readbyqxmd.com/read/28123022/tnf-%C3%AE-differentially-regulates-synaptic-plasticity-in-the-hippocampus-and-spinal-cord-by-microglia-dependent-mechanisms-after-peripheral-nerve-injury
#10
Yong Liu, Li-Jun Zhou, Jun Wang, Dai Li, Wen-Jie Ren, Jiyun Peng, Xiao Wei, Ting Xu, Wen-Jun Xin, Rui-Ping Pang, Yong-Yong Li, Zhi-Hai Qin, Madhuvika Murugan, Mark P Mattson, Long-Jun Wu, Xian-Guo Liu
: Clinical studies show that chronic pain is accompanied by memory deficits and reduction in hippocampal volume. Experimental studies show that spared nerve injury (SNI) of the sciatic nerve induces long-term potentiation (LTP) at C-fiber synapses in spinal dorsal horn, but impairs LTP in the hippocampus. The opposite changes may contribute to neuropathic pain and memory deficits, respectively. However, the cellular and molecular mechanisms underlying the functional synaptic changes are unclear...
January 25, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28120640/blockade-of-nmda-receptors-decreased-spinal-microglia-activation-in-bee-venom-induced-acute-inflammatory-pain-in-rats
#11
Li Li, Yongfang Wu, Zhifeng Bai, Yuyan Hu, Wenbin Li
OBJECTIVES: Microglial cells in spinal dorsal horn can be activated by nociceptive stimuli and the activated microglial cells release various cytokines enhancing the nociceptive transmission. However, the mechanisms underlying the activation of spinal microglia during nociceptive stimuli have not been well understood. In order to define the role of NMDA receptors in the activation of spinal microglia during nociceptive stimuli, the present study was undertaken to investigate the effect of blockade of NMDA receptors on the spinal microglial activation induced by acute peripheral inflammatory pain in rats...
March 2017: Neurological Research
https://www.readbyqxmd.com/read/28092666/loss-of-%C3%AE-opioid-receptor-signaling-in-nociceptors-but-not-microglia-abrogates-morphine-tolerance-without-disrupting-analgesia
#12
Gregory Corder, Vivianne L Tawfik, Dong Wang, Elizabeth I Sypek, Sarah A Low, Jasmine R Dickinson, Chaudy Sotoudeh, J David Clark, Ben A Barres, Christopher J Bohlen, Grégory Scherrer
Opioid pain medications have detrimental side effects including analgesic tolerance and opioid-induced hyperalgesia (OIH). Tolerance and OIH counteract opioid analgesia and drive dose escalation. The cell types and receptors on which opioids act to initiate these maladaptive processes remain disputed, which has prevented the development of therapies to maximize and sustain opioid analgesic efficacy. We found that μ opioid receptors (MORs) expressed by primary afferent nociceptors initiate tolerance and OIH development...
February 2017: Nature Medicine
https://www.readbyqxmd.com/read/28088201/anti-allodynic-effect-of-buja-in-a-rat-model-of-oxaliplatin-induced-peripheral-neuropathy-via-spinal-astrocytes-and-pro-inflammatory-cytokines-suppression
#13
Yongjae Jung, Ji Hwan Lee, Woojin Kim, Sang Hyub Yoon, Sun Kwang Kim
BACKGROUND: Oxaliplatin, a widely used anticancer drug against metastatic colorectal cancer, can induce acute peripheral neuropathy, which is characterized by cold and mechanical allodynia. Activation of glial cells (e.g. astrocytes and microglia) and increase of pro-inflammatory cytokines (e.g. IL-1β and TNF-α) in the spinal cord play a crucial role in the pathogenesis of neuropathic pain. Our previous study demonstrated that Gyejigachulbu-Tang (GBT), a herbal complex formula, alleviates oxaliplatin-induced neuropathic pain in rats by suppressing spinal glial activation...
January 14, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28072466/chronic-pain-and-impaired-glial-glutamate-transporter-function-in-lupus-prone-mice-are-ameliorated-by-blocking-macrophage-colony-stimulating-factor-1-receptors
#14
Xisheng Yan, Dylan W Maixner, Fen Li, Han-Rong Weng
Systemic lupus erythematosus (SLE) is a multi-organ disease of unknown etiology in which the normal immune responses are directed against the body's own healthy tissues. Patients with SLE often suffer from chronic pain. Currently, no animal studies have been reported about the mechanisms underlying pain in SLE. In this study, the development of chronic pain in MRL lupus-prone (MRL/lpr) mice, a well-established lupus mouse model, was characterized for the first time. We found that female MRL/lpr mice developed thermal hyperalgesia at the age of 13 weeks, and mechanical allodynia at the age of 16 weeks...
January 10, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28039964/degenerative-joint-diseases-and-neuroinflammation
#15
REVIEW
Mariella Fusco, Stephen D Skaper, Stefano Coaccioli, Antonella Paladini, Giustino Varrassi
Rheumatic and joint diseases, as exemplified by osteoarthritis and rheumatoid arthritis, are among the most widespread painful and disabling pathologies across the globe. Given the continuing rise in life expectancy, their prevalence is destined to grow. Osteoarthritis, a degenerative joint disease, is, in particular, on its way to becoming the fourth leading cause of disability worldwide by 2020, with the rising incidence of obesity in addition to age being important factors. It is estimated that 25% of osteoarthritic individuals are unable to perform daily activities...
December 31, 2016: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/28039043/cathepsin-s-in-the-spinal-microglia-contributes-to-remifentanil-induced-hyperalgesia-in-rats
#16
L Ye, L Xiao, S Y Yang, J J Duan, Y Chen, Y Cui, Y Chen
Cysteine protease Cathepsin S (CatS) expressed by spinal microglia has been shown to play a critical role in nerve injury and inflammation-induced chronic pain. However, whether microglial CatS contributes to remifentanil-induced acute hyperalgesia remains unstudied. In the present study, intravenous remifentanil infusion induced a significant increase in the expression of premature and mature form of CatS in the activated microglia in the spinal cord. Spinal delivery of irreversible CatS inhibitor LHVS reduced hyperalgesia, attenuated activation of spinal microglia and blocked phosphorylation of NMDA receptor NR1 subunit induced by remifentanil...
March 6, 2017: Neuroscience
https://www.readbyqxmd.com/read/28039041/spinal-activation-of-alpha7-nicotinic-acetylcholine-receptor-attenuates-posttraumatic-stress-disorder-related-chronic-pain-via-suppression-of-glial-activation
#17
Rao Sun, Wei Zhang, Jinhua Bo, Zuoxia Zhang, Yishan Lei, Wenwen Huo, Yue Liu, Zhengliang Ma, Xiaoping Gu
The high prevalence of chronic pain in posttraumatic stress disorder (PTSD) individuals has been widely reported by clinical studies, which emphasized an urgent need to uncover the underlying mechanisms and identify potential therapeutic targets. Recent studies suggested that targeting activated glia and their pro-inflammatory products may provide a novel and effective therapy for the stress-related pain. In this study, we investigated whether activation of alpha-7 nicotinic acetylcholine receptor (α7 nAChR), a novel anti-inflammatory target, could attenuate PTSD-related chronic pain...
March 6, 2017: Neuroscience
https://www.readbyqxmd.com/read/28031332/regulator-of-g-protein-signaling-10-rgs10-expression-is-transcriptionally-silenced-in-activated-microglia-by-histone-deacetylase-activity
#18
Mohammed Alqinyah, Nagini Maganti, Mourad W Ali, Ruchi Yadav, Mei Gao, Han-Rong Weng, Susanna F Greer, Shelley B Hooks
RGS10 has emerged as a key regulator of pro-inflammatory cytokine production in microglia, functioning as an important neuroprotective factor. While RGS10 is normally expressed in microglia at high levels, expression is silenced in vitro following activation of TLR4 receptor. Given the ability of RGS10 to regulate inflammatory signaling, dynamic regulation of RGS10 levels in microglia may be an important mechanism to tune inflammatory responses. The goals of the current study were to confirm that RGS10 is suppressed in an in vivo inflammatory model of microglial activation and to determine the mechanism for activation-dependent silencing of Rgs10 expression in microglia...
December 28, 2016: Molecular Pharmacology
https://www.readbyqxmd.com/read/28028627/effect-of-electroacupuncture-on-the-cervicospinal-p2x7-receptor-fractalkine-cx3cr1-signaling-pathway-in-a-rat-neck-incision-pain-model
#19
Y H Gao, C W Li, J Y Wang, L H Tan, C L Duanmu, X H Jing, X R Chang, J L Liu
Increasing evidence supports that acupuncture intervention is an effective approach for intraoperative and postoperative pain. Neuron-microglia crosstalk, mediated by the purinergic P2X7 receptor (R)/fractalkine/CX3CR1 cascade in the spinal cord dorsal horn, plays a pivotal role in pain processing. However, its involvement in the analgesic effect of electroacupuncture (EA) remains unclear. In this study, a rat neck-incision pain model was established by making a longitudinal incision along the midline of the neck and subsequent repeated mechanical stimulation...
December 27, 2016: Purinergic Signalling
https://www.readbyqxmd.com/read/28024908/hyp-17-a-novel-voltage-gated-sodium-channel-blocker-relieves-inflammatory-and-neuropathic-pain-in-rats
#20
Jee Youn Lee, Yoo Lim Kam, Jungae Oh, Dong Hyun Kim, Jin-Sung Choi, Hae Young Choi, Sungmin Han, Inchan Youn, Hea-Young Park Choo, Tae Young Yune
Clinical and experimental studies suggest that voltage-gated sodium channels (VGSCs) play a key role in the pathogenesis of neuropathic pain and that blocking agents against these channels can be potentially therapeutic. In the current study, we investigated whether a novel compound, (-)-2-Amino-1-(4-((4-chlorophenyl)(phenyl)methyl)piperazin-1-yl)-propan-1-one(HYP-17), binds to VGSCs and evaluated its inhibitory effect on Na(+) currents of the rat dorsal root ganglia (DRG) sensory neurons and its analgesic effect on inflammatory and neuropathic pain...
February 2017: Pharmacology, Biochemistry, and Behavior
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