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Condition: Back Pain

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Total 191 results found since Jan 2013.

Role of ATP-sensitive potassium channels in modulating nociception in rat model of bone cancer pain.
Abstract Bone cancer pain is a major clinical problem and remains difficult to treat. ATP-sensitive potassium (KATP) channels may be involved in regulating nociceptive transmission at the spinal cord level. We determined the role of spinal KATP channels in the control of mechanical hypersensitivity in a rat model of bone cancer pain. The rat model of bone cancer pain was induced by implanting rat mammary gland carcinoma cells (Walker256) into the tibias. KATP modulators (pinacidil and glibenclamide) or the specific Kir6.2-siRNA were injected via an intrathecal catheter. The mechanical withdrawal threshold of rats ...
Source: Brain Research - January 27, 2014 Category: Neurology Authors: Xia H, Zhang D, Yang S, Wang Y, Xu L, Wu J, Ren J, Yao W, Fan L, Zhang C, Tian Y, Pan HL, Wang X Tags: Brain Res Source Type: research

Caspase 3 Silencing Inhibits Biomechanical Overload-Induced Intervertebral Disk Degeneration.
Abstract Intervertebral disk (IVD) degeneration causes debilitating low back pain in much of the worldwide population. No efficient treatment exists because of an unclear pathogenesis. One characteristic event early in such degeneration is the apoptosis of nucleus pulposus (NP) cells embedded in IVDs. Excessive biomechanical loading may also be a major etiology of IVD degeneration. The present study used in vitro and in vivo models of compressive loading to elucidate the underlying mechanism of IVD degeneration. In addition, we investigated whether the inhibition of apoptosis is a potential clinical therapeutic ...
Source: The American Journal of Pathology - January 2, 2014 Category: Pathology Authors: Yamada K, Sudo H, Iwasaki K, Sasaki N, Higashi H, Kameda Y, Ito M, Takahata M, Abumi K, Minami A, Iwasaki N Tags: Am J Pathol Source Type: research

MrgC agonism at central terminals of primary sensory neurons inhibits neuropathic pain
Summary: Our research suggests that MrgC agonism at spinal sites constitutes a novel pain inhibitory mechanism in rodent models of neuropathic pain.Abstract: Chronic neuropathic pain is often refractory to current pharmacotherapies. The rodent Mas-related G-protein-coupled receptor subtype C (MrgC) shares substantial homogeneity with its human homologue, MrgX1, and is located specifically in small-diameter dorsal root ganglion neurons. However, evidence regarding the role of MrgC in chronic pain conditions has been disparate and inconsistent. Accordingly, the therapeutic value of MrgX1 as a target for pain treatment in hum...
Source: Pain - December 12, 2013 Category: Anesthesiology Authors: Shao-Qiu He, Zhe Li, Yu-Xia Chu, Liang Han, Qian Xu, Man Li, Fei Yang, Qin Liu, Zongxiang Tang, Yun Wang, Niyada Hin, Takashi Tsukamoto, Barbara Slusher, Vinod Tiwari, Ronen Shechter, Feng Wei, Srinivasa N. Raja, Xinzhong Dong, Yun Guan Tags: Research papers Source Type: research

Using i-Fect to Knock Down GLT-1 Gene in vivo
Pain Researchers continue to use our i-FectTM Transfection Kit for Gene Expression AnalysisValproate Prevents Dysregulation of Spinal Glutamate and Reduces the Development of Hypersensitivity in Rats After Peripheral Nerve Injury. The Journal of Pain, Volume 14, Issue 11, November 2013, Pages 1485–1491 http://dx.doi.org/10.1016/j.jpain.2013.07.007.Researchers use the kit to deliver Glutamate Receptor 1 siRNA in vivo.The present study examined whether the histone deacetylase inhibitor valproate prevents downregulation of glutamate transporters in the primary cultured astrocytes and in the spinal cord after L5-L6 spinal ne...
Source: siRNA and DsiRNA Transfection Efficiency - November 6, 2013 Category: Neuroscience Tags: Delivering siRNA to the CNS GLT-1 Gene Glutamate Receptor 1 siRNA in vivo i-Fect intrathecal delivery of siRNA Source Type: news

Valproate Prevents Dysregulation of Spinal Glutamate and Reduces the Development of Hypersensitivity in Rats After Peripheral Nerve Injury
This study demonstrates that valproate prevents the downregulation of glutamate transporters in the spinal cord, which contributes in part to the development of chronic pain after nerve injury. Given clinical availability and established safety profiles, perioperative use of valproate should be tested to prevent chronic pain after surgery.
Source: The Journal of Pain - September 9, 2013 Category: Materials Science Authors: Masaru Yoshizumi, James C. Eisenach, Ken-ichiro Hayashida Tags: Original Reports Source Type: research

Hyaluronic acid fragments enhance the inflammatory and catabolic response in human intervertebral disc cells through modulation of toll-like receptor 2 signaling pathways
Conclusions: These findings suggest that fHAs may have the potential to mediate IVD degeneration and discogenic back pain through activation of the TLR2 signaling pathway in resident IVD cells.
Source: BioMed Central - August 22, 2013 Category: Journals (General) Authors: Lilian QueroMarina KlawitterAnja SchmausMelanie RothleyJonathan SleemanAndré N TiadenJuergen KlasenNorbert BoosMichael O HottigerKarin WuertzPeter J Richards Source Type: research

Unexpected association of the “inhibitory” neuroligin 2 with excitatory PSD95 in neuropathic pain
Summary: Modified expression and function of the adhesion molecule neuroligin 2 are involved in the excitation/inhibition imbalance leading to the dorsal horn network’s hyperexcitability in neuropathic rats.Abstract: In the spinal nerve ligation (SNL) model of neuropathic pain, synaptic plasticity shifts the excitation/inhibition balance toward excitation in the spinal dorsal horn. We investigated the deregulation of the synaptogenic neuroligin (NL) molecules, whose NL1 and NL2 isoforms are primarily encountered at excitatory and inhibitory synapses, respectively. In the dorsal horn of SNL rats, NL2 was overexpressed whe...
Source: Pain - July 29, 2013 Category: Anesthesiology Authors: Tiphaine Dolique, Alexandre Favereaux, Olivier Roca-Lapirot, Virginie Roques, Claire Léger, Marc Landry, Frédéric Nagy Tags: Research papers Source Type: research

Gelsemine, a principal alkaloid from Gelsemium sempervirens Ait., exhibits potent and specific antinociception in chronic pain by acting at spinal α3 glycine receptors
TOC summary: Gelsemine produces potent and specific antinociception in chronic pain states by activating spinal α3 glycine receptors without inducing tolerance.Abstract: The present study examined the antinociceptive effects of gelsemine, the principal alkaloid in Gelsemium sempervirens Ait. A single intrathecal injection of gelsemine produced potent and specific antinociception in formalin-induced tonic pain, bone cancer-induced mechanical allodynia, and spinal nerve ligation-induced painful neuropathy. The antinociception was dose-dependent, with maximal inhibition of 50% to 60% and ED50 values of 0.5 to 0.6μg. Multipl...
Source: Pain - July 24, 2013 Category: Anesthesiology Authors: Jing-Yang Zhang, Nian Gong, Jin-Lu Huang, Ling-Chen Guo, Yong-Xiang Wang Tags: Research papers Source Type: research

Expression and Functional Role of Metallothioneins I and II in the Spinal Cord in Inflammatory and Neuropathic Pain Models.
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 i...
Source: Brain Research - May 30, 2013 Category: Neurology Authors: Kwon A, Jeon SM, Hwang SH, Kim JH, Cho HJ Tags: Brain Res Source Type: research

Full-length membrane-bound tumor necrosis factor-α acts through tumor necrosis factor receptor 2 to modify phenotype of sensory neurons
Summary: Membrane-bound tumor necrosis factor-α, acting through tumor necrosis factor receptor 2, causes increased expression in dorsal root ganglia of genes whose products are implicated in heightened neuronal excitability characteristic of chronic neuropathic pain.Abstract: Neuropathic pain resulting from spinal hemisection or selective spinal nerve ligation is characterized by an increase in membrane-bound tumor necrosis factor-alpha (mTNFα) in spinal microglia without detectable release of soluble TNFα (sTNFα). In tissue culture, we showed that a full-length transmembrane cleavage-resistant TNFα (CRTNFα) construc...
Source: Pain - May 28, 2013 Category: Anesthesiology Authors: Zetang Wu, Shiyong Wang, Sandy Gruber, Marina Mata, David J. Fink Tags: Research papers Source Type: research

Phospholipase C-related but catalytically inactive protein modulates pain behavior in a neuropathic pain model in mice
Conclusions: Suppressed expression of PRIPs induces an elevated expression of KCC2 in the spinal cord, resulting in inhibition of nociception and amelioration of neuropathic pain in DKO mice.
Source: Molecular Pain - May 2, 2013 Category: Molecular Biology Authors: Tomoya KitayamaKatsuya MoritaRizia SultanaNami KikushigeKeisuke MgitaShinya UenoMasato HirataTakashi Kanematsu Source Type: research