Neurobiology of Pain最新文献

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NGF stimulation alters the transcriptome and surface TrkB expression in axons of dorsal root ganglion neurons. NGF刺激改变背根神经节神经元轴突的转录组和表面TrkB表达。
Neurobiology of Pain Pub Date : 2025-08-05 eCollection Date: 2025-07-01 DOI: 10.1016/j.ynpai.2025.100194
Maximilian Koch, Manas Kshirsagar, Ankita Rawat, Abdolhossein Zare, Felicitas Schlott, Thorsten Bischler, Panagiota Arampatzi, Michael Briese, Michael Sendtner
{"title":"NGF stimulation alters the transcriptome and surface TrkB expression in axons of dorsal root ganglion neurons.","authors":"Maximilian Koch, Manas Kshirsagar, Ankita Rawat, Abdolhossein Zare, Felicitas Schlott, Thorsten Bischler, Panagiota Arampatzi, Michael Briese, Michael Sendtner","doi":"10.1016/j.ynpai.2025.100194","DOIUrl":"10.1016/j.ynpai.2025.100194","url":null,"abstract":"<p><p>Nerve growth factor (NGF) is released after injury from macrophages and other cell types and induces an inflammatory response in neurons, characterized by local subcellular reactions and transcriptomic modulation. NGF-induced axonal transcriptome modulation may be crucial for pain initiation and maintenance. To explore these acute modulations, we cultured dorsal root ganglion neurons in microfluidic chambers and stimulated the axons with NGF. We found that axonal levels of the <i>Il7</i> transcript encoding interleukin-7 (IL-7) are increased after NGF stimulation, followed by IL-7 release from axons. In growth cones of sensory neurons, we also observed a reorganization of the ribosomal subunits 60S and 40S in response to NGF stimulation. In addition, a dynamic change in the spatio-temporal distribution of the Tropomyosin Kinase B (TrkB) receptor occurs at the plasma membrane of sensory neuron growth cones. TrkB is recruited from the endoplasmic reticulum (ER) leading to increased cell surface levels. De-novo synthesis of TrkB seems to be limited to somatic regions of sensory neurons. Thus, cytosolic mechanisms within distal regions of the sensory neurons may autonomously regulate signaling and translation in response to external NGF stimuli.</p>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"100194"},"PeriodicalIF":0.0,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12355597/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144876719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A non-toxic analgesic elicits cell-specific genomic and epigenomic modulation by targeting the PAG brain region 一种无毒镇痛药通过靶向PAG脑区引发细胞特异性基因组和表观基因组调节
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100192
Hernan A. Bazan , Brian L. Giles , Surjyadipta Bhattacharjee , Scott Edwards , Nicolas G. Bazan
{"title":"A non-toxic analgesic elicits cell-specific genomic and epigenomic modulation by targeting the PAG brain region","authors":"Hernan A. Bazan ,&nbsp;Brian L. Giles ,&nbsp;Surjyadipta Bhattacharjee ,&nbsp;Scott Edwards ,&nbsp;Nicolas G. Bazan","doi":"10.1016/j.ynpai.2025.100192","DOIUrl":"10.1016/j.ynpai.2025.100192","url":null,"abstract":"<div><div>Acetaminophen (ApAP) is widely used for pain management, but overuse or overdose leads to hepatotoxicity, making it the leading cause of acute liver failure globally. There is an urgent need for safer pain medications, as other non-opioid analgesics like non-steroidal anti-inflammatory drugs (NSAIDs) are nephrotoxic. We have identified SRP-001 as a safer, non-hepatotoxic, novel analgesic that overcomes ApAP’s limitations by avoiding NAPQI formation and preserving hepatic tight junctions. Using coupled RNA and ATAC sequencing, from the periaqueductal gray (PAG) midbrain region, we compared the genetic and epigenetic signatures of SRP-001 and ApAP treatments following complete Freund’s adjuvant (CFA)-induced inflammatory pain against no treatment and vehicle controls. Our analysis revealed differential activity in three transcription factor families (SOX, SP/KLF, and AP-1) with cell-specific patterns and altered neuron-neuron interactions through neurexin-neuregulin signaling. SRP-001 and ApAP demonstrated similar genetic and epigenetic outcomes, indicating that SRP-001 is a favorable alternative due to its non-hepatotoxic properties while maintaining the same antinociceptive effects as ApAP.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100192"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of depression on the peak alpha frequency as a biomarker of pain sensitivity 抑郁对作为疼痛敏感性生物标志物的α峰频率的影响
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100193
Mingge Shi , Luiza Bonfim Pacheco , Natalia Egorova-Brumley
{"title":"The effect of depression on the peak alpha frequency as a biomarker of pain sensitivity","authors":"Mingge Shi ,&nbsp;Luiza Bonfim Pacheco ,&nbsp;Natalia Egorova-Brumley","doi":"10.1016/j.ynpai.2025.100193","DOIUrl":"10.1016/j.ynpai.2025.100193","url":null,"abstract":"<div><h3>Objective</h3><div>To assess how Peak Alpha Frequency (PAF) as a neurophysiological biomarker of pain sensitivity is influenced by conditions often comorbid with chronic pain, e.g., depression, and how methodological differences in deriving PAF, e.g., from Eyes-open (EO) vs. Eyes-closed (EC) EEG recordings affect this association.</div></div><div><h3>Methods</h3><div>We analyzed data from 47 participants (70 % female) aged 18–51 years (<em>M</em> = 25.0, <em>SD</em> = 6.50). Among them, all participants underwent EO EEG recording but only a subset of 25 participants underwent both EO and EC recording. Depression (Patient Health Quotient – 9 M = 4.49, SD = 3.96) and sensitivity to heat pain were measured.</div></div><div><h3>Results</h3><div>In EO, Spearman correlations showed no significant PAF-pain relationship (p = 0.530) but a positive correlation with depression (ρ = 0.348, p = 0.019). In EC, no significant correlations emerged, though a trend (p = 0.052) suggested depression might moderate PAF-pain links. Notably, the EO-EC PAF difference negatively correlated with depression (ρ = −0.54, p &lt; 0.01).</div></div><div><h3>Conclusions</h3><div>PAF may be sensitive to depression, albeit in the opposite direction to pain, and therefore mask the association between PAF and pain in individuals with depression. Differences in EO vs. EC PAF, as well as the EO-EC difference warrant further study.</div></div><div><h3>Significance</h3><div>Depression affects PAF especially in the eyes-open recordings.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100193"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144829711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ASIC1a-associated mechanical hypersensitivity in the GlaKO Fabry disease mouse model GlaKO法布里病小鼠模型中asic1a相关的机械超敏反应
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100189
Mayra Micaela Montes , Libia Catalina Salinas Castellanos , Georgina Oriana Mingolo Malnati , Juan Santiago Guidobono , Ariel Félix Gualtieri , Mariela Lacave , Romina De Lucca , María Natalia Gobetto , Pablo Gabriel Vetta , Zaira Soledad Verónica Náguila , Fernanda Toledo , Osvaldo Daniel Uchitel , Carina Weissmann
{"title":"ASIC1a-associated mechanical hypersensitivity in the GlaKO Fabry disease mouse model","authors":"Mayra Micaela Montes ,&nbsp;Libia Catalina Salinas Castellanos ,&nbsp;Georgina Oriana Mingolo Malnati ,&nbsp;Juan Santiago Guidobono ,&nbsp;Ariel Félix Gualtieri ,&nbsp;Mariela Lacave ,&nbsp;Romina De Lucca ,&nbsp;María Natalia Gobetto ,&nbsp;Pablo Gabriel Vetta ,&nbsp;Zaira Soledad Verónica Náguila ,&nbsp;Fernanda Toledo ,&nbsp;Osvaldo Daniel Uchitel ,&nbsp;Carina Weissmann","doi":"10.1016/j.ynpai.2025.100189","DOIUrl":"10.1016/j.ynpai.2025.100189","url":null,"abstract":"<div><div>Different lines of evidence point to a role for Acid-sensing ion channel 1 (ASIC1) in pain perception, acting as sensors in both the central nervous system and peripheral tissues. While elevated ASIC1 protein expression has been documented in various pain conditions, our study focuses on its involvement in the context of Fabry disease (FD).</div><div>Using a mouse model of FD, we observed a significant increase in ASIC1 protein expression in pain-related areas including the anterior cingulate cortex (ACC), as well as the spinal cord (SC) and dorsal root ganglia (DRG) at the lumbar, thoracic, and cervical levels. This upregulation was accompanied by increased ASIC1a mRNA levels and ERK phosphorylation. Moreover, in FD mice, ASIC1 protein expression was found to be modulated by age and sex: it was higher in female mice than in males, and increased with age in both sexes.</div><div>These findings, together with our previous work showing unaltered ASIC1a mRNA levels but microRNA-mediated regulation of ASIC1a protein in the formalin-induced acute pain model, highlight distinct mechanisms of ASIC1a regulation in FD-associated versus acute pain. Additionally, our study revealed heightened mechanical sensitivity in FD mice that could be prevented using a channel blocker, further highlighting the involvement of ASIC1a channels in pain pathways associated with Fabry disease. Our findings suggest that ASIC1a channels may serve as promising therapeutic targets for pain management in Fabry disease.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100189"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physiological actions of a humanized P2X4 scFv on peripheral and central neurons in male mice with neuropathic pain 人源化P2X4 scFv对神经性疼痛雄性小鼠外周和中枢神经元的生理作用
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100198
Sachin Goyal , Ian Adams , Marena Montera , Nesia A. Zurek , Shivali Goyal , Adinarayana Kunamneni , Karin N. Westlund , Sascha R.A. Alles
{"title":"Physiological actions of a humanized P2X4 scFv on peripheral and central neurons in male mice with neuropathic pain","authors":"Sachin Goyal ,&nbsp;Ian Adams ,&nbsp;Marena Montera ,&nbsp;Nesia A. Zurek ,&nbsp;Shivali Goyal ,&nbsp;Adinarayana Kunamneni ,&nbsp;Karin N. Westlund ,&nbsp;Sascha R.A. Alles","doi":"10.1016/j.ynpai.2025.100198","DOIUrl":"10.1016/j.ynpai.2025.100198","url":null,"abstract":"<div><div>Neuropathic pain remains a challenging clinical condition due to its resistance to conventional analgesics. The purinergic P2X4 receptor (P2X4R), an ATP-gated ion channel, is upregulated in sensory neurons and glial cells following nerve injury and is pivotal in chronic pain pathogenesis. This study evaluates the therapeutic potential of a novel humanized single-chain variable fragment antibody (hP2X4R scFv) targeting P2X4R in male mice models of neuropathic pain. Using spared nerve injury (SNI) and foramen rotundum inflammatory compression of the trigeminal infraorbital nerve (FRICT-ION) models, we demonstrate that a single intraperitoneal dose of hP2X4R scFv significantly reverses mechanical hypersensitivity for up to four weeks. Electrophysiological recordings from FosTRAP mice revealed that hP2X4R scFv reduced the excitability of Fos+ neurons in the spinal dorsal horn and ventrolateral periaqueductal gray (vlPAG), key regions involved in pain processing. <em>In vitro</em>, patch-clamp studies further showed that hP2X4R scFv selectively decreased action potential firing in larger diameter dorsal root ganglion (DRG) and trigeminal ganglion (TG) neurons from SNI and FRICT-ION mice, respectively, without affecting naïve neurons. These findings suggest that hP2X4R scFv modulates both central and peripheral neuronal excitability associated with chronic pain. The specificity and long-lasting efficacy of hP2X4R scFv highlights its promise as a non-opioid therapeutic candidate for neuropathic pain management.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100198"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The impact of nerve injury on the immune system across the lifespan is sexually dimorphic 神经损伤对免疫系统的影响在整个生命周期中是两性二态的
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100195
Wen Bo S. Zhou , Xiang Q. Shi , Alain P. Zhang , Magali Millecamps , Jeffrey S. Mogil , Ji Zhang
{"title":"The impact of nerve injury on the immune system across the lifespan is sexually dimorphic","authors":"Wen Bo S. Zhou ,&nbsp;Xiang Q. Shi ,&nbsp;Alain P. Zhang ,&nbsp;Magali Millecamps ,&nbsp;Jeffrey S. Mogil ,&nbsp;Ji Zhang","doi":"10.1016/j.ynpai.2025.100195","DOIUrl":"10.1016/j.ynpai.2025.100195","url":null,"abstract":"<div><div>Although nerve injury-associated neuroinflammation contributes to neuropathic pain, the long-term impact of such injury on systemic homeostasis and its potential role in pain remains elusive. In this study, we aim to understand the systemic changes that are present alongside chronic pain in nerve-injured male and female mice across their lifespan. We monitored mechanical and cold sensitivity in male and female mice starting at the age of 3–4 months old when they received spared nerve injury (SNI), up to 20-month post-injury. Alongside, we collected blood samples to track changes in immune cells with flow cytometry, and to assess inflammation-related serum proteome using a 111-target Proteome Profiler. We also transferred serum from sham/SNI mice to naïve mice to determine the potential of systemic contribution to pain. While nerve injury did not affect immune cell composition in the blood, it triggered a long-lasting disturbance of molecular profile in the serum of sham/SNI mice, in a sex-dependent manner. Compared to sham surgery, nerve injury amplified regulation of inflammatory proteins in males, but slightly reduced it in females. These changes in the serum occurred in parallel with long-lasting mechanical and cold hypersensitivity in the nerve-injured mice. Both male and female SNI serum induced hypersensitivity when transferred to naïve mice, regardless of a sex-matched or sex-mismatched transfer. Our results highlight that a local nerve injury can have persistent systemic impact. Injury-associated systemic inflammation could contribute to neuropathic pain, but the underlying mechanisms may be sexually dimorphic.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100195"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144890930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nrxn3 reduces myofascial nociceptive pain Nrxn3减轻肌筋膜痛觉性疼痛
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100197
Lauren Nguyen, Mikhail Umorin, Phillip R. Kramer
{"title":"Nrxn3 reduces myofascial nociceptive pain","authors":"Lauren Nguyen,&nbsp;Mikhail Umorin,&nbsp;Phillip R. Kramer","doi":"10.1016/j.ynpai.2025.100197","DOIUrl":"10.1016/j.ynpai.2025.100197","url":null,"abstract":"<div><div>Neurexin 3 (Nrxn3) has a role in neuronal signaling. Previous reports indicated that reducing Nrxn3 expression in the central amygdala increased orofacial neuropathic pain. A common temporomandibular disorder is myofascial pain. Thus, we hypothesized that Nrxn3 would reduce myofascial hypersensitivity. To test this hypothesis Nrxn3 shRNA was infused into the central amygdala of male rats. Then a ligature of the tendon attachment of the anterior superficial portion of the masseter muscle was performed to induce inflammatory orofacial pain. Dark phase meal duration was measured continuously, and von Frey filament testing was completed every 7 days for 21 days to measure the nociceptive response. After testing tissues were collected and the amount of Nrxn3 was measured. Neuronal activity in the orofacial pain pathway was quantitated by c-Fos staining of the central amygdala, lateral parabrachial nucleus, trigeminal ganglia and trigeminal nucleus caudalis. Knockdown of Nrxn3 in the central amygdala significantly increased the pain response and increased the levels of c-Fos. This increased response was observed for greater than two weeks. The data suggests Nrxn3 expression within the central amygdala attenuates nociceptive orofacial pain by reducing neuronal activity.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100197"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145048131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neuronal physiology of amygdala neurons in the context of injury and pain 损伤和疼痛背景下杏仁核神经元的神经生理学
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100190
Blesson K Paul, Maria Isabel Nunez-Ordaz, Joseph R. Samuel, Benedict J. Kolber
{"title":"Neuronal physiology of amygdala neurons in the context of injury and pain","authors":"Blesson K Paul,&nbsp;Maria Isabel Nunez-Ordaz,&nbsp;Joseph R. Samuel,&nbsp;Benedict J. Kolber","doi":"10.1016/j.ynpai.2025.100190","DOIUrl":"10.1016/j.ynpai.2025.100190","url":null,"abstract":"<div><div>The amygdala integrates polymodal information including nociceptive stimuli. It is implicated as a key node in regulating both sensory-discriminative and emotional-affective aspects of pain and central sensitization. While central sensitization mechanisms in persistent pain are not completely understood, studying the neuronal properties exhibited by the amygdala neurons within their functional context, in this case, nociception, is important. Such studies can shed light on the behavior-modulating potential of the amygdala. In the last twenty years, multiple laboratories have begun the process of dissecting the cell-type specific activity involved in amygdala function. This review surveys these electrophysiological properties of neurons from different amygdala nuclei, cell types and circuitry studied so far, in the context of nociception and injury. A population-level accounting of these cell types provides greater insight into identifying specific targets to develop interventions for pain-mediated affective conditions.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100190"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neutrophil dynamics in surgical wounds – A novel role of interleukin-7 外科伤口中性粒细胞动力学-白细胞介素-7的新作用
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100199
Annika Biesold , Philipp Burkard , Ankita Rawat , Laura Cyran , Patrick Meybohm , Heike Rittner , Michael Briese , Nana-Maria Wagner
{"title":"Neutrophil dynamics in surgical wounds – A novel role of interleukin-7","authors":"Annika Biesold ,&nbsp;Philipp Burkard ,&nbsp;Ankita Rawat ,&nbsp;Laura Cyran ,&nbsp;Patrick Meybohm ,&nbsp;Heike Rittner ,&nbsp;Michael Briese ,&nbsp;Nana-Maria Wagner","doi":"10.1016/j.ynpai.2025.100199","DOIUrl":"10.1016/j.ynpai.2025.100199","url":null,"abstract":"<div><div>Postoperative pain and consequently chronic postsurgical pain remain a significant burden among patients. While neutrophilic granulocytes (neutrophils) are known to play a critical role in wound healing, their precise contribution to pain modulation is not fully understood. The neurotrophin nerve growth factor (NGF), released by fibroblasts and immune cells following injury, is an early mediator of pain development. A companion paper demonstrated that NGF administration to axons of cultured sensory neurons in microfluidic chambers induces upregulation of <em>Il7</em>, encoding interleukin-7 (IL-7). However, its role in neutrophil dynamics within surgical wounds remains broadly unclear. In a murine model of laparotomy, we observed that IL-7 was expressed at wound sites and co-localized with sensory nerve endings and infiltrating neutrophils within 24 h post-surgery. Laparotomy triggered neutrophil mobilization from the bone marrow, leading to an influx of both mature and immature neutrophils into the circulation. Flow cytometric analysis further revealed IL-7 receptor (IL-7R) surface expression on neutrophils, with IL-7 stimulation also enhancing the expression of activation and maturation markers on neutrophils in vitro. These findings suggest that NGF-induced IL-7 release from peripheral nerve terminals represents a novel neuroinflammatory mechanism modulating neutrophil dynamics in the surgical wound, potentially impairing wound healing and exacerbating pain. Therefore, targeting IL-7 signalling in peripheral nerves may offer a promising strategy for improving postoperative pain management.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100199"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Circulating microRNAs differentiate nociceptive and nociplastic pain: An exploratory study 循环microRNAs区分伤害性和伤害性疼痛:一项探索性研究
Neurobiology of Pain Pub Date : 2025-07-01 DOI: 10.1016/j.ynpai.2025.100191
Hiroyuki Nishie , Hideki Nakatsuka , Kazunori Iwasa , Yuka Sakuta , Yuichiro Toda , Shigeru Mitani , Takeshi Nagasaka
{"title":"Circulating microRNAs differentiate nociceptive and nociplastic pain: An exploratory study","authors":"Hiroyuki Nishie ,&nbsp;Hideki Nakatsuka ,&nbsp;Kazunori Iwasa ,&nbsp;Yuka Sakuta ,&nbsp;Yuichiro Toda ,&nbsp;Shigeru Mitani ,&nbsp;Takeshi Nagasaka","doi":"10.1016/j.ynpai.2025.100191","DOIUrl":"10.1016/j.ynpai.2025.100191","url":null,"abstract":"<div><h3>Background</h3><div>Nociceptive and nociplastic pain arise from distinct biological mechanisms, yet their differentiation remains clinically challenging. Circulating microRNAs (miRNAs) are promising candidates for objective, mechanism-based pain classification.</div></div><div><h3>Objective</h3><div>To explore whether specific circulating miRNAs can differentiate nociceptive pain in patients with hip osteoarthritis (HO) from nociplastic pain in patients with chronic primary pain (CPP), and to assess their relationship with clinical and psychological outcomes.</div></div><div><h3>Methods</h3><div>In this exploratory, single-center study, plasma samples were collected from patients with HO (n = 13), CPP (n = 11), and healthy controls (n = 7). Microarray screening identified candidate miRNAs, which were validated via real-time PCR. Pain intensity (NRS), disability (PDAS), quality of life (EQ-5D), and psychological factors (PCS, PSEQ, TSK-11, PHQ-9) were assessed. Classification accuracy was evaluated using decision tree modeling and ROC analysis.</div></div><div><h3>Results</h3><div><em>Let-7a</em>, <em>miR-26a</em>, and <em>miR-16</em> showed distinct expression profiles and contributed to a predictive model with strong performance (<em>R<sup>2</sup></em> = 0.677; AUC &gt; 0.94). <em>Let-7a</em> expression was associated with structural joint changes in HO but not subjective pain ratings. <em>MiR-26a</em> correlated with cognitive-affective pain traits in CPP, and <em>miR-16</em> decreased following CBT, suggesting a role in treatment-related neuroplasticity. <em>MiR-126</em> and <em>miR-146a</em> were linked to reductions in pain intensity post-surgery in the HO group. QOL improved in HO, while psychological factors remained prominent in CPP.</div></div><div><h3>Conclusions</h3><div>This pilot study suggests that circulating miRNAs may aid in differentiating nociceptive and nociplastic pain mechanisms and tracking treatment effects. While preliminary, these findings support the potential utility of miRNA-based biomarkers in precision pain diagnostics and personalized management strategies.</div></div>","PeriodicalId":52177,"journal":{"name":"Neurobiology of Pain","volume":"18 ","pages":"Article 100191"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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