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Increased spinal adenosine after subacute cervical injury correlates with sustained upregulation of CD39 and CD73 in microglia 亚急性颈椎损伤后脊髓腺苷增加与小胶质细胞中CD39和CD73的持续上调有关
IF 4 3区 医学
Neurochemistry international Pub Date : 2025-10-01 Epub Date: 2025-08-05 DOI: 10.1016/j.neuint.2025.106030
Mackenzie R. Berschel , Maria Nikodemova , Jose R. Oberto, Alexandria B. Marciante, Alysha Michaelson, Gordon S. Mitchell
{"title":"Increased spinal adenosine after subacute cervical injury correlates with sustained upregulation of CD39 and CD73 in microglia","authors":"Mackenzie R. Berschel ,&nbsp;Maria Nikodemova ,&nbsp;Jose R. Oberto,&nbsp;Alexandria B. Marciante,&nbsp;Alysha Michaelson,&nbsp;Gordon S. Mitchell","doi":"10.1016/j.neuint.2025.106030","DOIUrl":"10.1016/j.neuint.2025.106030","url":null,"abstract":"<div><div>Cervical spinal cord injuries (cSCI) are associated with decreased breathing ability. Although no treatment options are currently available, moderate acute intermittent hypoxia (mAIH) is a promising therapeutic modality to improve breathing function after cSCI. Moderate AIH elicits phrenic motor plasticity <em>via</em> distinct, competing serotonin- or adenosine-driven mechanisms that interact <em>via</em> powerful crosstalk inhibition that constrains or even abolishes plasticity. The dominant mechanism driving plasticity depends on the spinal serotonin/adenosine balance. Shortly after cSCI, repeated AIH exposure elicits plasticity <em>via</em> an adenosine-dependent mechanism but reverts to serotonin-dominance with chronic cSCI. In healthy CNS, microglia regulate AIH-induced phrenic motor plasticity <em>via</em> enzymatic activities of ectonucleotidases (CD39, CD73) by converting extracellular ATP to adenosine. We hypothesized that cSCI increases microglial ectonucleotidase expression, elevating adenosine levels that may alter therapeutic responses to mAIH post-cSCI. We assessed microglial CD39 and CD73 expression at the subacute (1 &amp; 2 weeks) and chronic (8 weeks) stages post C2-hemisection, both at the injury site (C1–C3) and in spinal segments containing phrenic motor neurons below the injury (C3–C6). Both enzymes were upregulated (mRNA &amp; protein) 1- and 2-weeks post injury but returned to baseline by 8 weeks. In association, spinal adenosine increased significantly at 2, but not 8 weeks post-injury. Further, microglial CD39 and CD73 expression strongly correlate with P2Y12 receptor expression. Thus, shifting adenosine levels between subacute and early chronic cSCI may impact mechanism regulating mAIH-induced respiratory motor plasticity and breathing recovery at different times post-cSCI.</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"189 ","pages":"Article 106030"},"PeriodicalIF":4.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144779560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combined supplementation of short-chain fatty acids reduces hyperphosphorylation of Tau at T181,T231 and S396 sites and improves cognitive impairment in a chemically induced AD mouse model via regulation of HDAC and Keap1 联合补充短链脂肪酸可以减少Tau在T181、T231和S396位点的过度磷酸化,并通过调节HDAC和Keap1改善化学诱导AD小鼠模型的认知障碍
IF 4 3区 医学
Neurochemistry international Pub Date : 2025-10-01 Epub Date: 2025-08-12 DOI: 10.1016/j.neuint.2025.106034
Dan Pu , Ye Jin , Longxing Wang , Renjun Wang , Lingyu Li , Yang Song , Xiaofei Han
{"title":"Combined supplementation of short-chain fatty acids reduces hyperphosphorylation of Tau at T181,T231 and S396 sites and improves cognitive impairment in a chemically induced AD mouse model via regulation of HDAC and Keap1","authors":"Dan Pu ,&nbsp;Ye Jin ,&nbsp;Longxing Wang ,&nbsp;Renjun Wang ,&nbsp;Lingyu Li ,&nbsp;Yang Song ,&nbsp;Xiaofei Han","doi":"10.1016/j.neuint.2025.106034","DOIUrl":"10.1016/j.neuint.2025.106034","url":null,"abstract":"<div><div>Alzheimer's disease (AD) is characterized by the pathological hallmarks of β-amyloid deposition and Tau protein hyperphosphorylation, with memory loss and cognitive dysfunction as its primary clinical manifestations. The incidence of AD has been progressively increasing in recent years. Short-chain fatty acids (SCFAs), key effector molecules in host-gut microbial interactions, play a crucial role in maintaining central nervous system homeostasis. In this study, AD mouse model was established via AlCl<sub>3</sub>/D-gal induction. The effects of mixed SCFA intervention on spatial learning and memory in AD model mice were assessed using behavioral tests, including the Morris Water Maze. Levels of pro-inflammatory cytokines and activities of oxidative stress-related enzymes in brain and colon tissues were quantified using ELISA and commercial kits. Key protein expression levels were analyzed by Western blot, immunohistochemistry, and immunofluorescence. Results demonstrated that SCFAs significantly alleviated cognitive dysfunction in AD model, reduced Tau hyperphosphorylation at T181, T231 and S396 sites, suppressed pro-inflammatory cytokine release, and enhanced antioxidant capacity, but with no reversal in elevated Aβ levels in AD model. Mechanistically, SCFAs inhibited glial cell activation, upregulated MCT-1 and tight junction proteins in the blood-brain barrier and strengthened gut-brain barrier integrity, potentially regulating small molecule <em>trans</em>-barrier transport. Furthermore, examination of relevant protein expressions revealed that SCFAs activated HDAC1 and inhibited overexpressed HDAC3 and Keap-1 in AD mice model. These findings suggest that SCFAs may regulate epigenetic modifications in the brain of AD to exert neuroprotective effects. This study provides novel evidence supporting the potential of symbiotic microbe-derived SCFAs in alleviating AD.</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"189 ","pages":"Article 106034"},"PeriodicalIF":4.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144852112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Circular RNAs from the MAPT and TARDBP genes: Novel players in neurodegeneration? 来自MAPT和TARDP基因的环状rna:神经变性的新参与者?
IF 4.4 3区 医学
Neurochemistry international Pub Date : 2025-10-01 Epub Date: 2025-07-07 DOI: 10.1016/j.neuint.2025.106019
Naghme Bagheri , Giorgi Margvelani , Tai-Wei Chiang , Peter T. Nelson , Trees-Juen Chuang , Stefan Stamm
{"title":"Circular RNAs from the MAPT and TARDBP genes: Novel players in neurodegeneration?","authors":"Naghme Bagheri ,&nbsp;Giorgi Margvelani ,&nbsp;Tai-Wei Chiang ,&nbsp;Peter T. Nelson ,&nbsp;Trees-Juen Chuang ,&nbsp;Stefan Stamm","doi":"10.1016/j.neuint.2025.106019","DOIUrl":"10.1016/j.neuint.2025.106019","url":null,"abstract":"<div><div>The microtubule associated protein tau (<em>MAPT</em>) and TAR DNA binding protein (<em>TARDBP</em>) genes play crucial roles in neurodegeneration. The tau protein encoded by <em>MAPT</em> is the main component of tau tangles, a pathologic hallmark of “tauopathies” such as Alzheimer's disease (AD). Cytosolic accumulations of TDP-43, encoded by <em>TARDBP</em> are characteristic for LATE (Limbic-predominant age-related TDP-43 encephalopathy) and other TDPopathies. In addition to the well-characterized mRNA splicing isoforms, both genes generate a multitude of circular RNAs (circRNAs). Both <em>MAPT</em> and <em>TARDBP</em> express circular RNA-specific exons characterized by suboptimal splice sites and lengths and are frequently derived from Alu-elements. Most circTau and to date all circTARDBP RNAs expressed in brain are human-specific, suggesting a possible unique contribution to human brain disease. TARDBP and MAPT circRNAs harbor open reading frames and circTau RNAs were shown to be translated into polypeptides in cells. Thus, circRNAs from the <em>MAPT</em> and <em>TARDBP</em> genes should be considered in molecular analysis of AD, LATE and other neurological diseases.</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"189 ","pages":"Article 106019"},"PeriodicalIF":4.4,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144599022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TRPM8 modulation alters uptake of Transferrin-mediated Fe3+, mitochondrial Fe2+ and intracellular Ca2+-levels in microglia TRPM8调节改变小胶质细胞中铁蛋白介导的Fe3+、线粒体Fe2+和细胞内Ca2+水平的摄取。
IF 4 3区 医学
Neurochemistry international Pub Date : 2025-10-01 Epub Date: 2025-08-08 DOI: 10.1016/j.neuint.2025.106031
Raima Sing , Deep Shikha , Chandan Goswami
{"title":"TRPM8 modulation alters uptake of Transferrin-mediated Fe3+, mitochondrial Fe2+ and intracellular Ca2+-levels in microglia","authors":"Raima Sing ,&nbsp;Deep Shikha ,&nbsp;Chandan Goswami","doi":"10.1016/j.neuint.2025.106031","DOIUrl":"10.1016/j.neuint.2025.106031","url":null,"abstract":"<div><div>Microglia play an important role in the immunity of the central nervous system, crucial in maintaining homeostasis. However, under diseased conditions, this cell accumulates Fe<sup>2+/3+</sup>, triggering inflammatory and neurotoxic effects that contribute to neurodegenerative disorders such as Alzheimer's and Parkinson's. Hence, the study of dysregulated microglial activation and overload of Fe<sup>2+/3+</sup> is crucial in the context of neurodegenerative conditions. Emerging research has identified cold-sensitive ion channels, i.e., TRPM8 in microglia, which can regulate key subcellular functions. This study explores the regulatory function of the TRPM8 in Fe<sup>2+/3+</sup> metabolism and its implications for potential ferroptosis in BV2 microglial cells. We used highly specific fluorescence probes, pharmacological modulators of TRPM8 and performed life cell imaging to understand the uptake of Transferrin-488, mitochondrial Fe<sup>2+</sup>-level, cellular Ca<sup>2+</sup>-levels in live BV2 cells under different experimental conditions. Our findings reveal that TRPM8 activation leads to enhanced Transferrin-488-mediated cytosolic Fe<sup>3+</sup>-uptake, disrupts mitochondrial superoxide levels, and promotes cell death. Interestingly, under inflammatory conditions induced by LPS treatment, TRPM8 exhibits a distinct functional role. These results position TRPM8 as an important regulator of microglial Fe<sup>2+/3+</sup> metabolism. This study indicates the involvement of TRPM8 in overload of Fe<sup>2+/3+</sup> leading to ferroptosis and potential for M1-M2 polarization in microglia. These findings impose TRPM8 as a potential therapeutic target for neurodegenerative diseases, and aging.</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"189 ","pages":"Article 106031"},"PeriodicalIF":4.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144815473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Probing impact of sleep deprivation on hippocampal neurochemistry in rats using CEST imaging and 1H-MRS at 7.0T MRI 利用CEST成像和7.0T MRI 1H-MRS探查睡眠剥夺对大鼠海马神经化学的影响
IF 4.4 3区 医学
Neurochemistry international Pub Date : 2025-10-01 Epub Date: 2025-07-15 DOI: 10.1016/j.neuint.2025.106020
Zhihong Zhao , Lvhao Wang , Xiaolei Zhang , Yue Chen , Xinhui Zheng , Renhua Wu
{"title":"Probing impact of sleep deprivation on hippocampal neurochemistry in rats using CEST imaging and 1H-MRS at 7.0T MRI","authors":"Zhihong Zhao ,&nbsp;Lvhao Wang ,&nbsp;Xiaolei Zhang ,&nbsp;Yue Chen ,&nbsp;Xinhui Zheng ,&nbsp;Renhua Wu","doi":"10.1016/j.neuint.2025.106020","DOIUrl":"10.1016/j.neuint.2025.106020","url":null,"abstract":"<div><h3>Purpose</h3><div>Sleep is a physiological process that plays a crucial role in maintaining cognitive functions. The hippocampus, a key brain region implicated in cognition, is particularly sensitive to sleep deprivation. we aim to investigate impact of sleep deprivation on hippocampal neurochemistry in rats using CEST imaging and <sup>1</sup>H-MRS.</div></div><div><h3>Methods</h3><div>Twelve female Sprague-Dawley rats were randomly divided into sleep deprivation and control groups. All rats experienced Morris water maze training and testing from Day 1 to Day 6 and underwent MRI scans including CEST imaging and <sup>1</sup>H-MRS on Days 1 and Day 3. Lastly, rats were euthanized for Nissl staining.</div></div><div><h3>Results</h3><div>Sleep deprivation led to a significant decrease in CEST signals across various frequency offsets (0.5–3.5 ppm) in the hippocampus (P &lt; 0.05). Meanwhile, sleep deprivation caused an increase in glutamate (P &lt; 0.0001) with no alterations in other metabolites (P &gt; 0.05). Behaviorally, sleep deprivation impaired learning-memory abilities, evidenced by reduced target quadrant distance (P &lt; 0.001) and time (P &lt; 0.01) in the Morris water maze. Histologically, sleep deprivation caused a decline of surviving neurons in the hippocampal CA1 and CA3 regions (P &lt; 0.001). These indicators correlated negatively with the concentrations of glutamate (P &lt; 0.05) and positively with most of the CEST signals (P &lt; 0.05) in the hippocampus.</div></div><div><h3>Conclusion</h3><div>The integration of CEST imaging and <sup>1</sup>H-MRS offers a promising approach for identifying imaging biomarkers that aid in the assessment and management of sleep deprivation's impact on hippocampal neurochemistry.</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"189 ","pages":"Article 106020"},"PeriodicalIF":4.4,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144658092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The potentiating activity of benzodiazepine site of the GABA(A) receptor is inhibited by competitive antagonists of orthosteric site GABA(A)受体苯二氮平的增强活性被正构位的竞争性拮抗剂所抑制
IF 4.4 3区 医学
Neurochemistry international Pub Date : 2025-09-01 Epub Date: 2025-07-05 DOI: 10.1016/j.neuint.2025.106018
Elena I. Solntseva, Julia V. Bukanova, Rodion V. Kondratenko
{"title":"The potentiating activity of benzodiazepine site of the GABA(A) receptor is inhibited by competitive antagonists of orthosteric site","authors":"Elena I. Solntseva,&nbsp;Julia V. Bukanova,&nbsp;Rodion V. Kondratenko","doi":"10.1016/j.neuint.2025.106018","DOIUrl":"10.1016/j.neuint.2025.106018","url":null,"abstract":"<div><div>Benzodiazepines (BDZs) are widely-prescribed drugs that act as positive allosteric modulators of GABA<sub>A</sub> receptor, enhancing the GABA-elicited chloride current (<em>I</em><sub>GABA</sub>). In this work, we studied the influence of competitive antagonists of the GABA<sub>A</sub> receptor gabazine (GBZ), bicuculline (Bic), and amiloride (Ami) on the potentiating effect of the agonist of BDZ site zolpidem (Zolp). These antagonists bind to their own sites, which partially overlap with the orthosteric site. The experiments were carried out on native GABA<sub>A</sub> receptors in isolated Purkinje cells of the rat cerebellum. The <em>I</em><sub>GABA</sub> was measured using the patch-clamp technique and a system of fast application. The effects of the drugs on <em>I</em><sub>GABA</sub> were assessed by the change in the EC<sub>50</sub> value for GABA dose-effect curve constructed in the ranges of 0.5–100 μM GABA. Changes in EC<sub>50</sub> values as a percentage relative to the control were calculated. 0.5 μM Zolp shifted the GABA curve to the left and decreased the EC<sub>50</sub> by 54 % (from 4.8 μM to 2.2 μM). Competitive antagonists shifted the GABA curve to the right and increased the EC<sub>50</sub> to 72.6 μM (0.5 μM GBZ), 25.5 μM (500 μM Ami) and 28.8 μM (5 μM Bic). With the addition of Zolp, these EC<sub>50</sub> values decreased by 21–25 % and were 56.8 μM (GBZ), 19.2 μM (Ami), and 22.7 μM (Bic), respectively. The results show that the potentiating effect of Zolp is reduced by half in the presence of competitive GABA<sub>A</sub> receptor antagonists (p &lt; 0. 001).</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"188 ","pages":"Article 106018"},"PeriodicalIF":4.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DNA methylation and hydroxymethylation dynamics in the aging brain and its impact on ischemic stroke 衰老脑中的DNA甲基化和羟甲基化动力学及其对缺血性脑卒中的影响
IF 4.4 3区 医学
Neurochemistry international Pub Date : 2025-09-01 Epub Date: 2025-06-11 DOI: 10.1016/j.neuint.2025.106007
Vijay Arruri , Pallavi Joshi , Raghu Vemuganti
{"title":"DNA methylation and hydroxymethylation dynamics in the aging brain and its impact on ischemic stroke","authors":"Vijay Arruri ,&nbsp;Pallavi Joshi ,&nbsp;Raghu Vemuganti","doi":"10.1016/j.neuint.2025.106007","DOIUrl":"10.1016/j.neuint.2025.106007","url":null,"abstract":"<div><div>DNA methylation and hydroxymethylation patterns at the 5th carbon of cytosine (5mC and 5hmC) in CpG dinucleotides tightly regulate gene transcription in normal physiology, aging, and associated diseases, including ischemic stroke. Resilience to ischemic brain injury depends on the interplay of diverse neural and non-neural cell types, whose gene expression and identity are predominantly regulated by brain-enriched epigenetic mechanisms, particularly the dynamics of 5mC and 5hmC in response to changing transcriptional demands under ischemic stress. In this review, we discussed the role of 5mC and 5hmC in aging and the pathophysiology of stroke. Given the high degree of inter-individual variability in stroke studies and its multifactorial etiology, we emphasize the need for personalized, temporally controlled, epigenome-based therapies to improve stroke outcomes.</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"188 ","pages":"Article 106007"},"PeriodicalIF":4.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thiamet-G ameliorates Parkinson's disease-associated cognitive impairment via increasing O-GlcNAcylation of STING in the microglia Thiamet-G通过增加小胶质细胞中STING的o - glcn酰化来改善帕金森病相关的认知障碍
IF 4.4 3区 医学
Neurochemistry international Pub Date : 2025-09-01 Epub Date: 2025-06-26 DOI: 10.1016/j.neuint.2025.106014
Shanshan Zhu , Nan Wang , Shuyang Chen , Ju Zou , Sijie Tan
{"title":"Thiamet-G ameliorates Parkinson's disease-associated cognitive impairment via increasing O-GlcNAcylation of STING in the microglia","authors":"Shanshan Zhu ,&nbsp;Nan Wang ,&nbsp;Shuyang Chen ,&nbsp;Ju Zou ,&nbsp;Sijie Tan","doi":"10.1016/j.neuint.2025.106014","DOIUrl":"10.1016/j.neuint.2025.106014","url":null,"abstract":"<div><div>Microglia activation contributed to the development of Parkinson's disease (PD)-associated cognitive impairment and targeting microglia may be a promising strategy for improving the cognitive function in PD. O-GlcNAclytion is a novel protein post-translational modification with cognitive enhancing effects. This study aimed to investigate the effects of Thiamet-G (TMG), an O-GlcNAcase inhibitor that can increase the intracellular O-GlcNAclytion levels, on PD-associated cognitive impairment and the mechanism related to microglia activation. A PD mouse model was established using rotenone (ROT) and the cognitive functions of these mice were investigated by behavioral tests. The anti-inflammatory effects of TMG were tested in the BV2 microglia cells. TMG treatment significantly improved the cognitive function in the ROT-induced PD mouse model as evidenced by the Y-maze test and objective recognition test. Histological studies showed that TMG decreased the reactive microglia via increasing the total protein O-GlcNAclytion levels in the hippocampus of the PD mice. In the in vitro studies, TMG inhibited ROT-induced inflammation via decreasing the pro-inflammatory cytokines such as TNF-α, IL-1β and IL-6 in BV2 microglia cells. Bioinformatic analysis revealed that STING, a core protein in the innate immunity regulation, might be a novel target of O-GlcNAclytion. The <strong>i</strong>mmunoprecipitation experiments further confirmed that TMG inhibited STING phosphorylation via increasing O-GlcNAcylation. Taken together, <span>TMG</span> might ameliorate PD-associated cognitive impairment via increasing O-GlcNAcylation of STING in microglia, which provided evidence supporting that inhibiting the inflammatory response of microglia by elevating the O-GlcNAclytion levels might be an effective strategy for improving the cognitive function in PD.</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"188 ","pages":"Article 106014"},"PeriodicalIF":4.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of NLRP6 inflammasome on neuroinflammation in temporal lobe epilepsy NLRP6炎性小体对颞叶癫痫神经炎症的影响
IF 4.4 3区 医学
Neurochemistry international Pub Date : 2025-09-01 Epub Date: 2025-05-19 DOI: 10.1016/j.neuint.2025.105994
Yiming Guo , Jiaqi Song , Yingxi Chen , Yang Lü , Weihua Yu
{"title":"Impact of NLRP6 inflammasome on neuroinflammation in temporal lobe epilepsy","authors":"Yiming Guo ,&nbsp;Jiaqi Song ,&nbsp;Yingxi Chen ,&nbsp;Yang Lü ,&nbsp;Weihua Yu","doi":"10.1016/j.neuint.2025.105994","DOIUrl":"10.1016/j.neuint.2025.105994","url":null,"abstract":"<div><div>Epilepsy is one of the most common and severe chronic brain diseases, affecting up to 70 million people worldwide. Neuroinflammation plays a central role in the progression of the disease. The Nod-Like Receptor Protein 6 (NLRP6) inflammasome assembles with apoptosis-associated speck-like protein (ASC) to cleave pro-caspase-1 into caspase-1, thus forming the NLRP6 inflammasome. This process promotes the maturation and release of downstream interleukins (IL)-18 and IL-1β, exacerbating pathological processes in various diseases. In this study, we demonstrated significantly enhanced NLRP6 expression in the cortex and hippocampus of epileptic mice, suggesting a role for the inflammasome in epilepsy. Immunofluorescence staining further revealed that NLRP6 was predominantly expressed in hippocampal neurons of these mice. Additionally, knockdown of NLRP6 reduced susceptibility to epilepsy, alleviated post-seizure neuronal damage, and decreased levels of pro-inflammatory cytokines, including IL-18, IL-1β, and IL-6. Conversely, NLRP6 overexpression produced opposite effects, which were effectively reversed by treatment with the caspase-1 inhibitor VX765. To the best of our knowledge, this is the first study to demonstrate a link between NLRP6 and the activation of the caspase-1/IL-1β/IL-18 signaling pathway in a kainic acid (KA)-induced epilepsy mouse model. Administration of VX765 alleviated pathological alterations and exerted neuroprotective effects. These findings suggest that NLRP6 plays a critical role in the initiation and progression of epilepsy.</div></div>","PeriodicalId":398,"journal":{"name":"Neurochemistry international","volume":"188 ","pages":"Article 105994"},"PeriodicalIF":4.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Repetitive transcranial magnetic stimulation as a universal modulator of synaptic plasticity: Bridging the gap between functional and structural plasticity 重复经颅磁刺激作为突触可塑性的普遍调节剂:弥合功能和结构可塑性之间的差距
IF 4.4 3区 医学
Neurochemistry international Pub Date : 2025-09-01 Epub Date: 2025-07-08 DOI: 10.1016/j.neuint.2025.106021
Danica Popovic , Milorad Dragic
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