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Adiponectin regulates electroacupuncture-produced analgesic effects in association with a crosstalk between the peripheral circulation and the spinal cord
In conclusion, the study indicates a novel mechanism that acupuncture produces analgesic effects at least partially via APN/AdipoR2-AMPK pathway in the spinal cord.PMID:34562596 | DOI:10.1016/j.bbi.2021.09.010
Source: Brain, Behavior, and Immunity - September 25, 2021 Category: Neurology Authors: Zhipeng Ning Pan Gu Jialing Zhang Chi Wai Cheung Lixing Lao Haiyong Chen Zhang-Jin Zhang Source Type: research

KDM6B epigenetically regulated-interleukin-6 expression in the dorsal root ganglia and spinal dorsal horn contributes to the development and maintenance of neuropathic pain following peripheral nerve injury in male rats
Brain Behav Immun. 2021 Aug 28;98:265-282. doi: 10.1016/j.bbi.2021.08.231. Online ahead of print.ABSTRACTThe lysine specific demethylase 6B (KDM6B) has been implicated as a coregulator in the expression of proinflammatory mediators, and in the pathogenesis of inflammatory and arthritic pain. However, the role of KDM6B in neuropathic pain has yet to be studied. In the current study, the neuropathic pain was determined by assessing the paw withdrawal threshold (PWT) and paw withdrawal latency (PWL) following lumbar 5 spinal nerve ligation (SNL) in male rats. Immunohistochemistry, Western blotting, qRT-PCR, and chromatin immu...
Source: Brain, Behavior, and Immunity - August 31, 2021 Category: Neurology Authors: Liren Li Liying Bai Kangli Yang Jian Zhang Yan Gao Mingjun Jiang Yin Yang Xuan Zhang Li Wang Xueli Wang Yiming Qiao Ji-Tian Xu Source Type: research

PARP-1-regulated TNF- α expression in the dorsal root ganglia and spinal dorsal horn contributes to the pathogenesis of neuropathic pain in rats.
PARP-1-regulated TNF-α expression in the dorsal root ganglia and spinal dorsal horn contributes to the pathogenesis of neuropathic pain in rats. Brain Behav Immun. 2020 Apr 10;: Authors: Gao Y, Bai L, Zhou W, Yang Y, Zhang J, Li L, Jiang M, Mi Y, Li TT, Zhang X, Zhang W, Xu JT Abstract Emerging evidence has implicated poly-(ADP-ribose) polymerase 1 (PARP-1), a transcriptional coregulator, in a variety of inflammatory diseases. In the current study, the role of PARP-1 in neuropathic pain and the underlying mechanisms were investigated. Neuropathic pain was determined by assessing the paw withdrawal th...
Source: Brain, Behavior, and Immunity - April 9, 2020 Category: Neurology Authors: Gao Y, Bai L, Zhou W, Yang Y, Zhang J, Li L, Jiang M, Mi Y, Li TT, Zhang X, Zhang W, Xu JT Tags: Brain Behav Immun 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

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

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

Tumor necrosis factor-mediated downregulation of spinal astrocytic connexin43 leads to increased glutamatergic neurotransmission and neuropathic pain in mice.
Abstract Spinal cord astrocytes are critical in the maintenance of neuropathic pain. Connexin 43 (Cx43) expressed on spinal dorsal horn astrocytes modulates synaptic neurotransmission, but its role in nociceptive transduction has yet to be fully elaborated. In mice, Cx43 is mainly expressed in astrocytes, not neurons or microglia, in the spinal dorsal horn. Hind paw mechanical hypersensitivity was observed beginning 3 days after partial sciatic nerve ligation (PSNL), but a persistent downregulation of astrocytic Cx43 in ipsilateral lumbar spinal dorsal horn was not observed until 7 days post-PSNL, suggesting that ...
Source: Brain, Behavior, and Immunity - June 23, 2015 Category: Neurology Authors: Morioka N, Zhang FF, Nakamura Y, Kitamura T, Hisaoka-Nakashima K, Nakata Y Tags: Brain Behav Immun Source Type: research

MicroRNA-146a-5p attenuates neuropathic pain via suppressing TRAF6 signaling in the spinal cord.
In this study, we found that in cultured astrocytes, TNF-α, IL-1β, or lipopolysaccharides (LPSs) induced rapid TRAF6 upregulation and delayed miR-146a-5p upregulation. In addition, miR-146a-5p mimic blocked LPS-induced TRAF6 upregulation, as well as LPS-induced c-Jun N-terminal kinase (JNK) activation and chemokine CCL2 expression in astrocytes. Notably, LPS incubation with astrocytes enhanced the DNA binding activity of AP-1 to the promoters of mir-146a and ccl2. TRAF6 siRNA or JNK inhibitor SP600125 significantly reduced LPS-induced miR-146a-5p increase in astrocytes. In vivo, intrathecal injection of TNF-α or LPS inc...
Source: Brain, Behavior, and Immunity - May 5, 2015 Category: Neurology Authors: Lu Y, Cao L, Jiang BC, Yang T, Gao YJ Tags: Brain Behav Immun Source Type: research