Molecular Pain最新文献

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Spinal HDAC6 mediates nociceptive behaviors induced by chronic constriction injury via neuronal activation and neuroinflammation. 脊髓HDAC6通过神经元激活和神经炎症介导CCI诱导的伤害性行为。
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231218352
Kai Sun, Hao Zhang, Ting Zhang, Nan Sun, Jingru Hao, Zhiping Wang, Can Gao
{"title":"Spinal HDAC6 mediates nociceptive behaviors induced by chronic constriction injury via neuronal activation and neuroinflammation.","authors":"Kai Sun, Hao Zhang, Ting Zhang, Nan Sun, Jingru Hao, Zhiping Wang, Can Gao","doi":"10.1177/17448069231218352","DOIUrl":"10.1177/17448069231218352","url":null,"abstract":"<p><p>Neuropathic pain (NP) is often accompanied by psychiatric comorbidities and currently lacks effective treatment. Prior research has shown that HDAC6 plays a crucial role in pain sensitization, but the specific mechanisms remain unclear. HDAC6 inhibitors have been found to alleviate mechanical allodynia caused by inflammation and peripheral nerve damage. In this study, we investigated the cellular mechanisms of HDAC6 in the development and maintenance of neuropathic pain. Our findings indicate that HDAC6 expression in the spinal cord (SC) is upregulated in a time-dependent manner following chronic constriction injury (CCI). HDAC6 is primarily expressed in neurons and microglia in the spinal cord. CCI-induced HDAC6 production was abolished by intrathecal injection of a microglia inhibitor. ACY-1215, a specific HDAC6 inhibitor, significantly reduced CCI-induced mechanical allodynia, but not thermal hyperalgesia. ACY-1215 also inhibited neuron activation and suppressed CCI-induced pyroptosis and neuroinflammatory responses. In summary, our results suggest that HDAC6 contributes to the development and maintenance of NP through neuronal activation and neuroinflammation. HDAC6 may be a promising target for treating NP.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":" ","pages":"17448069231218352"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10734332/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138047402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Genetic evidence of the function of Phox2a-expressing anterolateral system neurons in the transmission of chronic pain. 表达phox2a的前外侧系统神经元在慢性疼痛传递中的功能的遗传证据。
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231170546
Xinying Zhang, Magali Millecamps, Artur Kania
{"title":"Genetic evidence of the function of Phox2a-expressing anterolateral system neurons in the transmission of chronic pain.","authors":"Xinying Zhang,&nbsp;Magali Millecamps,&nbsp;Artur Kania","doi":"10.1177/17448069231170546","DOIUrl":"https://doi.org/10.1177/17448069231170546","url":null,"abstract":"<p><p>The development of the chronic neuropathic pain state often originates at the level of peripheral sensory neurons, whose abnormal function elicits central sensitization and maladaptive plasticity in the nociceptive circuits of the spinal dorsal horn. These changes eventually reach supraspinal areas bringing about cognitive and affective co-morbidities of chronic pain such as anxiety and depression. This transmission presumably relies on the function of spinal projection neurons at the origin of the anterolateral system (AS). However, the identity of these neurons and the extent of their functional contribution remain unknown. Here, we asked these questions in the context of the mouse AS neurons that require the transcription factor Phox2a for their normal target connectivity and function in transmitting acute nociceptive information to the brain. To this end, we examined the effects of a spinal cord-specific loss of Phox2a (Phox2a<sup>cKO</sup>) on the development of central sensitization evoked by the spared nerve injury (SNI) model of chronic pain. We found that SNI-treated Phox2a<sup>cKO</sup> mice developed normal reflexive spinal responses such as mechanical allodynia evidenced by a decreased withdrawal threshold to von Frey filament stimulation and dynamic brush. On the other hand, Phox2a<sup>cKO</sup> attenuated the development of cold but not mechanical hyperalgesia, in behavioral paradigms that require the relay of nociceptive information to the brain. Furthermore, Phox2a<sup>cKO</sup> attenuated anxio-depressive-like behaviors evoked by SNI, measured by performance in the open field test and tail suspension test. Thus, Phox2a AS neurons play a critical role in the generation and maintenance of chronic neuropathic pain.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069231170546"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/71/a5/10.1177_17448069231170546.PMC10291149.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9760090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Duloxetine prevents bortezomib and paclitaxel large-fiber chemotherapy-induced peripheral neuropathy (LF-CIPN) in sprague dawley rats. 度洛西汀可预防波特佐米和紫杉醇大纤维化疗诱导的周围神经病变(LF-CIPN)
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231185694
Niloufar Mansooralavi, Eugen V Khomula, Jon D Levine
{"title":"Duloxetine prevents bortezomib and paclitaxel large-fiber chemotherapy-induced peripheral neuropathy (LF-CIPN) in sprague dawley rats.","authors":"Niloufar Mansooralavi,&nbsp;Eugen V Khomula,&nbsp;Jon D Levine","doi":"10.1177/17448069231185694","DOIUrl":"https://doi.org/10.1177/17448069231185694","url":null,"abstract":"<p><p>Chemotherapy-induced peripheral neuropathy (CIPN) is a debilitating, treatment-limiting, side-effect of several classes of chemotherapy drugs. While negatively impacting oncology patients' quality of life, chemotherapy-induced large-fiber (LF) neuropathy is amongst the least well understood components of CIPN, and one for which there is currently no established therapy. Preliminary clinical observations have led to the suggestion that Duloxetine, which is used for the treatment of pain associated with small-fiber CIPN (SF-CIPN), may be effective against LF-CIPN. In the present experiments we developed a model of LF-CIPN and studied the effect of Duloxetine on LF-CIPN induced by two neurotoxic chemotherapy agents: the proteasome inhibitor, Bortezomib, a first-line treatment of multiple myeloma; and, the anti-microtubule taxane, Paclitaxel, used in the treatment of solid tumors. Since there are currently no models for selective the study of LF-CIPN, our first aim was to establish a pre-clinical model in the rat. LF-CIPN was evaluated with the Current Perception Threshold (CPT) assay, which uses a high frequency (1000 Hz) electrical stimulus protocol that selectively activates large-fiber myelinated afferents. Our second aim was to use this model to test the hypothesis that Duloxetine can prevent LF-CIPN. We report that Bortezomib and Paclitaxel induce elevation of CPT, compatible with loss of large-fiber function, which are prevented by Duloxetine. Our findings support the clinical observation that Duloxetine may be an effective treatment for the large-fiber CIPN. We also suggest that CPT could be used as a biomarker for LF-CIPN in patients receiving neurotoxic chemotherapy.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069231185694"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10288414/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9760379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mitochondrial reactivity following acute exposure to experimental pain testing in people with HIV and chronic pain. HIV和慢性疼痛患者急性暴露于实验性疼痛测试后的线粒体反应。
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231195975
Shannon R Gilstrap, Joanna M Hobson, Michael A Owens, Dyan M White, Melissa J Sammy, Scott Ballinger, Robert E Sorge, Burel R Goodin
{"title":"Mitochondrial reactivity following acute exposure to experimental pain testing in people with HIV and chronic pain.","authors":"Shannon R Gilstrap, Joanna M Hobson, Michael A Owens, Dyan M White, Melissa J Sammy, Scott Ballinger, Robert E Sorge, Burel R Goodin","doi":"10.1177/17448069231195975","DOIUrl":"10.1177/17448069231195975","url":null,"abstract":"<p><p><b>Background:</b> Physical stressors can cause a physiological response that can contribute to an increase in mitochondrial dysfunction and Mitochondrial DNA damage (mtDNA damage). People living with HIV (PWH) are more likely to suffer from chronic pain and may be more susceptible to mitochondrial dysfunction following exposure to a stressor. We used Quantitative Sensory Testing (QST) as an acute painful stressor in order to investigate whether PWH with/without chronic pain show differential mitochondrial physiological responses. <b>Methods:</b> The current study included PWH with (<i>n</i> = 26), and without (<i>n</i> = 29), chronic pain. Participants completed a single session that lasted approximately 180 min, including QST. Blood was taken prior to and following the QST battery for assays measuring mtDNA damage, mtDNA copy number, and mtDNA damage-associated molecular pattern (DAMP) levels (i.e., ND1 and ND6). <b>Results:</b> We examined differences between those with and without pain on various indicators of mitochondrial reactivity following exposure to QST. However, only ND6 and mtDNA damage were shown to be statistically significant between pain groups. <b>Conclusion:</b> PWH with chronic pain showed greater mitochondrial reactivity to laboratory stressors. Consequently, PWH and chronic pain may be more susceptible to conditions in which mitochondrial damage/dysfunction play a central role, such as cognitive decline.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069231195975"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/f7/a1/10.1177_17448069231195975.PMC10467217.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10116721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Acute sleep deprivation aggravates nitroglycerin-evoked hyperalgesia in mice. 急性睡眠不足会加重硝酸甘油诱发的小鼠痛觉减退。
IF 2.8 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069221149645
Zhe Yu, Bozhi Li, Wenjing Tang, Zhao Dong, Ruozhuo Liu, Shengyuan Yu
{"title":"Acute sleep deprivation aggravates nitroglycerin-evoked hyperalgesia in mice.","authors":"Zhe Yu, Bozhi Li, Wenjing Tang, Zhao Dong, Ruozhuo Liu, Shengyuan Yu","doi":"10.1177/17448069221149645","DOIUrl":"10.1177/17448069221149645","url":null,"abstract":"<p><p>Sleep deprivation can trigger migraine, and migraineurs often choose to sleep to relieve headaches during acute migraine. This study aimed to explore the effect of acute sleep deprivation on hyperalgesia induced by nitroglycerin in mice. In part one, after either 6-h sleep deprivation or 6-h normal sleep, mice were intraperitoneally injected with nitroglycerin or saline. The mechanical pain threshold and withdrawal latency of the hindpaw were measured every 30 min for 6 h. Next, the same sleep deprivation and injection procedure was performed with new mice, and mice were sacrificed 4.5 h after injection. The trigeminal nucleus caudalis and upper cervical spinal segments were taken for immunofluorescence Fos staining. In part two, after injection of saline or nitroglycerin, the mice were either deprived of sleep for 6 h or allowed to sleep without interference. The mechanical and thermal pain threshold were measured after 6 h. In part three, we compared the sleep time of mice after intraperitoneal injection of saline or nitroglycerin without interference. Sleep deprivation for 6 h did not cause any changes in the baseline pain thresholds in mice. However, pretreatment with 6-h sleep deprivation significantly prolonged the duration of hyperalgesia induced by nitroglycerin. Additionally, the expression of Fos at 4.5 h was significantly higher in the 6-h sleep deprivation and nitroglycerin group than in the other three groups. When intraperitoneal injection was given first, the mechanical pain threshold of the hind paw was significantly lower in the group that received nitroglycerin with 6-h sleep deprivation than in the other groups. Compared to the saline injection, one-time nitroglycerin injection would result in a significant increase in sleep latency and decrease in sleep duration for the normal mice. Acute sleep deprivation significantly aggravated the hyperalgesia induced by nitroglycerin in mice, which highlights the importance of sleep disorders for migraine.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069221149645"},"PeriodicalIF":2.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/fe/f7/10.1177_17448069221149645.PMC9830572.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10645666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Co-Administration of nalbuphine to improve morphine tolerance in mice with bone cancer pain. 联合给药纳布啡改善骨癌疼痛小鼠吗啡耐受性。
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231178741
Bingxu Ren, Jiannan Zhang, Xiaohu Yang, Dapeng Sun, Duanyang Sheng, Qiang Fang, Zhonghua Ji
{"title":"Co-Administration of nalbuphine to improve morphine tolerance in mice with bone cancer pain.","authors":"Bingxu Ren,&nbsp;Jiannan Zhang,&nbsp;Xiaohu Yang,&nbsp;Dapeng Sun,&nbsp;Duanyang Sheng,&nbsp;Qiang Fang,&nbsp;Zhonghua Ji","doi":"10.1177/17448069231178741","DOIUrl":"https://doi.org/10.1177/17448069231178741","url":null,"abstract":"<p><strong>Background: </strong>Kappa-opioid receptor (KOR) agonists are known for having opposite and/or different effects compared with Mu-opioid receptor (MOR) agonists. This study is aimed at clarifying the analgesic effect and tolerance of nalbuphine combined with morphine, and quantifying the mRNA and protein expression of spinal MOR and KOR in a mouse bone cancer pain (BCP) model treated with nalbuphine and morphine.</p><p><strong>Method: </strong>BCP model was prepared in C3H/HeNCrlVr Mice by implanting the sarcoma cells into the intramedullary space of the femur. The paw withdrawal thermal latency (PWL) measured by thermal radiometer was used to assess thermal hyperalgesia. PWL testing was performed after implantation and drug administration according to the protocol. Hematoxylin-eosin staining in the spinal cord and x-ray in the femoral intramedullary canal was detected. Real-time PCR and western blot analysis played a role in detecting spinal MOR and KOR expression changes.</p><p><strong>Results: </strong>In tumor-implanted mice, the spinal MOR and KOR protein and mRNA expression was down-regulated when compared to that in sham-implanted mice (<i>p</i> < 0.05). Morphine therapy can lead to a decrease in spinal μ receptor expression. Similarly, the nalbuphine therapy can lead to a decrease in the expression of κ receptor protein and mRNA at the spinal cord level (<i>p</i> < 0.05). Morphine, nalbuphine, or nalbuphine co-administration with morphine all can extend the paw withdrawal thermal latency (PWL) to radiant thermal stimulation in tumor-implanted mice (<i>p</i> < 0.05). Compared with the morphine treatment group, nalbuphine co-administration with morphine delayed the reduction of PWL value again (<i>p</i> < 0.05).</p><p><strong>Discussion: </strong>BCP itself may induce down-regulation of the spinal MOR and KOR expression. A low dose of nalbuphine co-administration with morphine led to the delayed emergence of morphine tolerance. The part of the mechanism may be due to the regulation of spinal opioid receptors expression.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069231178741"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/d6/96/10.1177_17448069231178741.PMC10226037.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9548941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Toll-like receptor 4 signaling pathway in sensory neurons mediates remifentanil-induced postoperative hyperalgesia via transient receptor potential ankyrin 1. 感觉神经元toll样受体4信号通路通过瞬时受体电位锚蛋白1介导瑞芬太尼术后痛觉过敏。
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231158290
Xiaowen Liu, Ruisong Gong, Liang Peng, Jing Zhao
{"title":"Toll-like receptor 4 signaling pathway in sensory neurons mediates remifentanil-induced postoperative hyperalgesia via transient receptor potential ankyrin 1.","authors":"Xiaowen Liu,&nbsp;Ruisong Gong,&nbsp;Liang Peng,&nbsp;Jing Zhao","doi":"10.1177/17448069231158290","DOIUrl":"https://doi.org/10.1177/17448069231158290","url":null,"abstract":"<p><p><b>Background:</b> Remifentanil-induced postoperative hyperalgesia (RIH) refers to a state of hyperalgesia or aggravated pre-existing pain after remifentanil exposure. There has been considerable interest in understanding and preventing RIH. However, the mechanisms responsible for RIH are still not completely understood. Toll-like receptor 4 (TLR4), a classic innate immune receptor, has been detected in sensory neurons and participates in various nociceptive conditions, whereas its role in RIH remains unclear. Transient receptor potential ankyrin 1 (TRPA1) always serves as a nociceptive channel, whereas its role in RIH has not yet been investigated. This study aimed to determine whether the TLR4 signaling pathway in sensory neurons engaged in the development of RIH and the possible involvement of TRPA1 during this process. <b>Methods:</b> A rat model of remifentanil-induced postoperative hyperalgesia (RIH) was established, which presented decreased paw withdrawal mechanical threshold (PWMT) and paw withdrawal thermal latency (PWTL). The mRNA and protein expression levels of TLR4, phosphorylated NF-κB, and TRPA1 in the dorsal root ganglion (DRG) from RIH model were analyzed by real-time PCR, western blot, and immunofluorescence. The TLR4 antagonist TAK-242 and the TRPA1 antagonist HC-030031 were applied to determine the role of sensory neuron TLR4 signaling and TRPA1 in RIH. <b>Results:</b> Compared with control, PWMT and PWTL were significantly decreased in RIH model. Moreover, the mRNA and protein expression of TLR4 and TRPA1 in DRG were upregulated after remifentanil exposure together with increased NF-κB phosphorylation. TLR4 antagonist TAK-242 mitigated mechanical pain in RIH together with downregulated expression of TLR4, phosphorylated NF-κB, and TRPA1 in DRG neurons. In addition, TRPA1 antagonist HC-030031 also alleviated mechanical pain and decreased TRPA1 expression in RIH without affecting TLR4 signaling in DRG. <b>Conclusions:</b> Taken together, these results suggested that activation of TLR4 signaling pathway engaged in the development of RIH by regulating TRPA1 in DRG neurons. Blocking TLR4 and TRPA1 might serve as a promising therapeutic strategy for RIH.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069231158290"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/37/7d/10.1177_17448069231158290.PMC9926008.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10734978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retraction Notice. 撤回通知。
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231161238
{"title":"Retraction Notice.","authors":"","doi":"10.1177/17448069231161238","DOIUrl":"10.1177/17448069231161238","url":null,"abstract":"","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069231161238"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b1/0c/10.1177_17448069231161238.PMC10074633.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9250399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Silent synapses in pain-related anterior cingulate cortex. 与疼痛相关的前扣带皮层中的沉默突触。
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231179011
Min Zhuo
{"title":"Silent synapses in pain-related anterior cingulate cortex.","authors":"Min Zhuo","doi":"10.1177/17448069231179011","DOIUrl":"https://doi.org/10.1177/17448069231179011","url":null,"abstract":"<p><p>Synaptic plasticity such as Long-term potentiation (LTP) is a key mechanism for learning in central synapses including the cortex. There are two least two major forms of LTPs: presynaptic LTP and postsynaptic LTP. For postsynaptic LTP, the potentiation of AMPA receptor-mediated responses through protein phosphorylation is thought to be a key mechanism. Silent synapses have been reported in the hippocampus, but it is thought to be mainly present in the cortex during early development, and may contribute to maturation of the cortical circuit. However, recent several lines of evidence demonstrate that silent synapses may exist in mature synapses of adult cortex, and they can be recruited by LTP-inducing protocols, as well as chemical-induced LTP. In pain-related cortical regions, silent synapses may not only contribute to cortical excitation after peripheral injury, but also the recruitment of new cortical circuits as well. Thus, it is proposed that silent synapses and modification of functional AMPA receptors and NMDA receptors may play important roles in chronic pain, including phantom pain.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069231179011"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10226042/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9543395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Evaluation of the concentration of growth associated protein-43 and glial cell-derived neurotrophic factor in degenerated intervertebral discs of the lumbosacral region of the spine. 脊柱腰骶区退变椎间盘中生长相关蛋白-43和胶质细胞源性神经营养因子浓度的评价。
IF 3.3 3区 医学
Molecular Pain Pub Date : 2023-01-01 DOI: 10.1177/17448069231158287
RafaÅ Staszkiewcz, Marcin Gralewski, Dorian gÅ Adysz, Kamil bryÅ, Tomasz Francuz, Wojciech Garczorz, michaÅ Garczarek, Marcin Gadzielinski, wiesÅ Aw Marcol, Dawid sobaÅ Ski, Beniamin Oskar Grabarek
{"title":"Evaluation of the concentration of growth associated protein-43 and glial cell-derived neurotrophic factor in degenerated intervertebral discs of the lumbosacral region of the spine.","authors":"RafaÅ Staszkiewcz,&nbsp;Marcin Gralewski,&nbsp;Dorian gÅ Adysz,&nbsp;Kamil bryÅ,&nbsp;Tomasz Francuz,&nbsp;Wojciech Garczorz,&nbsp;michaÅ Garczarek,&nbsp;Marcin Gadzielinski,&nbsp;wiesÅ Aw Marcol,&nbsp;Dawid sobaÅ Ski,&nbsp;Beniamin Oskar Grabarek","doi":"10.1177/17448069231158287","DOIUrl":"https://doi.org/10.1177/17448069231158287","url":null,"abstract":"<p><p>Important neurotrophic factors that are potentially involved in degenerative intervertebral disc (IVD) disease of the spine's lumbosacral (L/S) region include glial cell-derived neurotrophic factor (GDNF) and growth associated protein 43 (GAP-43). The aim of this study was to determine and compare the concentrations of GAP-43 and GDNF in degenerated and healthy IVDs and to quantify and compare the GAP-43-positive and GDNF-positive nerve fibers. The study group consisted of 113 Caucasian patients with symptomatic lumbosacral discopathy (confirmed by a specialist surgeon), an indication for surgical treatment. The control group included 81 people who underwent postmortem examination. GAP-43 and GDNF concentrations were significantly higher in IVD samples from the study group compared with the control group, and the highest concentrations were observed in the degenerated IVDs that were graded 4 on the Pfirrmann scale. In the case of GAP-43, it was found that as the degree of IVD degeneration increased, the number of GAP-43-positive nerve fibers decreased. In the case of GDNF, the greatest number of fibers per mm<sup>2</sup> of surface area was found in the IVD samples graded 3 on the Pfirrmann scale, and the number was found to be lower in samples graded 4 and 5. Hence, GAP-43 and GDNF are promising targets for analgesic treatment of degenerative IVD disease of the lumbosacral region of the spine.</p>","PeriodicalId":19010,"journal":{"name":"Molecular Pain","volume":"19 ","pages":"17448069231158287"},"PeriodicalIF":3.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/d3/e1/10.1177_17448069231158287.PMC10071099.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9636382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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