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Structural bases for blockade and activation of BK channels by Ba2+ ions Ba2+ 离子阻断和激活 BK 通道的结构基础
IF 5 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-18 DOI: 10.3389/fmolb.2024.1454273
Shubhra Srivastava, Pablo Miranda, Teresa Giraldez, Jianghai Zhu, Raul E. Cachau, Miguel Holmgren
{"title":"Structural bases for blockade and activation of BK channels by Ba2+ ions","authors":"Shubhra Srivastava, Pablo Miranda, Teresa Giraldez, Jianghai Zhu, Raul E. Cachau, Miguel Holmgren","doi":"10.3389/fmolb.2024.1454273","DOIUrl":"https://doi.org/10.3389/fmolb.2024.1454273","url":null,"abstract":"We studied the impact of Ba<jats:sup>2+</jats:sup> ions on the function and structure of large conductance potassium (BK) channels. Ion composition has played a crucial role in the physiological studies of BK channels due to their ability to couple ion composition and membrane voltage signaling. Unlike Ca<jats:sup>2+</jats:sup>, which activates BK channels through all <jats:italic>Regulator of K</jats:italic><jats:sup><jats:italic>+</jats:italic></jats:sup><jats:italic>Conductance</jats:italic> (RCK) domains, Ba<jats:sup>2+</jats:sup> has been described as specifically interacting with the RCK2 domain. It has been shown that Ba<jats:sup>2+</jats:sup> also blocks potassium permeation by binding to the channel’s selectivity filter. The Cryo-EM structure of the <jats:italic>Aplysia</jats:italic> BK channel in the presence of high concentration Ba<jats:sup>2+</jats:sup> here presented (PDBID: 7RJT) revealed that Ba<jats:sup>2+</jats:sup> occupies the K<jats:sup>+</jats:sup> S3 site in the selectivity filter. Densities attributed to K<jats:sup>+</jats:sup> ions were observed at sites S2 and S4. Ba<jats:sup>2+</jats:sup> ions were also found bound to the high-affinity Ca<jats:sup>2+</jats:sup> binding sites RCK1 and RCK2, which agrees with functional work suggesting that the Ba<jats:sup>2+</jats:sup> increases open probability through the Ca<jats:sup>2+</jats:sup> bowl site (RCK2). A comparative analysis with a second structure here presented (PDBID: 7RK6), obtained without additional Ba<jats:sup>2+</jats:sup>, shows localized changes between the RCK1 and RCK2 domains, suggestive of coordinated dynamics between the RCK ion binding sites with possible relevance for the activation/blockade of the channel. The observed densities attributed to Ba<jats:sup>2+</jats:sup> at RCK1 and RCK2 sites and the selectivity filter contribute to a deeper understanding of the structural basis for Ba<jats:sup>2+</jats:sup>'s dual role in BK channel modulation, adding to the existing knowledge in this field.","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"77 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lipid-based nanoparticles: innovations in ocular drug delivery. 脂基纳米颗粒:眼部给药的创新。
IF 3.9 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-17 eCollection Date: 2024-01-01 DOI: 10.3389/fmolb.2024.1421959
Mirza Salman Baig, Shweta Kulkarni Karade, Anas Ahmad, Mohd Ashif Khan, Anzarul Haque, Thomas J Webster, Md Faiyazuddin, Noora H Al-Qahtani
{"title":"Lipid-based nanoparticles: innovations in ocular drug delivery.","authors":"Mirza Salman Baig, Shweta Kulkarni Karade, Anas Ahmad, Mohd Ashif Khan, Anzarul Haque, Thomas J Webster, Md Faiyazuddin, Noora H Al-Qahtani","doi":"10.3389/fmolb.2024.1421959","DOIUrl":"10.3389/fmolb.2024.1421959","url":null,"abstract":"<p><p>Ocular drug delivery presents significant challenges due to intricate anatomy and the various barriers (corneal, tear, conjunctival, blood-aqueous, blood-retinal, and degradative enzymes) within the eye. Lipid-based nanoparticles (LNPs) have emerged as promising carriers for ocular drug delivery due to their ability to enhance drug solubility, improve bioavailability, and provide sustained release. LNPs, particularly solid lipid nanoparticles (SLNs), nanostructured lipid carriers (NLCs), and cationic nanostructured lipid carriers (CNLCs), have emerged as promising solutions for enhancing ocular drug delivery. This review provides a comprehensive summary of lipid nanoparticle-based drug delivery systems, emphasizing their biocompatibility and efficiency in ocular applications. We evaluated research and review articles sourced from databases such as Google Scholar, TandFonline, SpringerLink, and ScienceDirect, focusing on studies published between 2013 and 2023. The review discusses the materials and methodologies employed in the preparation of SLNs, NLCs, and CNLCs, focusing on their application as proficient carriers for ocular drug delivery. CNLCs, in particular, demonstrate superior effectiveness attributed due to their electrostatic bioadhesion to ocular tissues, enhancing drug delivery. However, continued research efforts are essential to further optimize CNLC formulations and validate their clinical utility, ensuring advancements in ocular drug delivery technology for improved patient outcomes.</p>","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"11 ","pages":"1421959"},"PeriodicalIF":3.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11442363/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142361394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The synergistic effects of anoikis-related genes and EMT-related genes in the prognostic prediction of Wilms tumor. anoikis相关基因和EMT相关基因在预测Wilms肿瘤预后中的协同作用。
IF 3.9 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-16 eCollection Date: 2024-01-01 DOI: 10.3389/fmolb.2024.1469775
Kexin Meng, Zerui Zhao, Yaqing Gao, Keliang Wu, Wei Liu, Xiaoqing Wang, Yi Zheng, Wei Zhao, Bei Wang
{"title":"The synergistic effects of anoikis-related genes and EMT-related genes in the prognostic prediction of Wilms tumor.","authors":"Kexin Meng, Zerui Zhao, Yaqing Gao, Keliang Wu, Wei Liu, Xiaoqing Wang, Yi Zheng, Wei Zhao, Bei Wang","doi":"10.3389/fmolb.2024.1469775","DOIUrl":"10.3389/fmolb.2024.1469775","url":null,"abstract":"<p><p>Wilms tumor (WT) is the most common type of malignant abdominal tumor in children; it exhibits a high degree of malignancy, grow rapidly, and is prone to metastasis. This study aimed to construct a prognosis model based on anoikis-related genes (ARGs) and epithelial-mesenchymal transition (EMT)-related genes (ERGs) for WT patients; we assessed the characteristics of the tumor microenvironment and treatment efficacy, as well as identifying potential therapeutic targets. To this end, we downloaded transcriptome sequencing data and clinical data for WT and normal renal cortices and used R to construct and validate the prognostic model based on ARGs and ERGs. Additionally, we performed clinical feature analysis, nomogram construction, mutation analysis, drug sensitivity analysis, Connectivity Map (cMAP) analysis, functional enrichment analysis, and immune infiltration analysis. Finally, we screened the hub gene using the STRING database and validated it via experiments. In this way, we constructed a model with good accuracy and robustness, which was composed of seven anoikis- and EMT-related genes. Paclitaxel and mesna were selected as potential chemotherapeutic drugs and adjuvant chemotherapeutic drugs for the WT high-risk group by using the Genomics of Drug Sensitivity in Cancer (GDSC) and cMAP compound libraries, respectively. We proved the existence of a strong correlation between invasive immune cells and prognostic genes and risk scores. Next, we selected NTRK2 as the hub gene, and <i>in vitro</i> experiments confirmed that its inhibition can significantly inhibit the proliferation and migration of tumor cells and promote late apoptosis. In summary, we screened out the potential biomarkers and chemotherapeutic drugs that can improve the prognosis of patients with WT.</p>","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"11 ","pages":"1469775"},"PeriodicalIF":3.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11439783/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The value of lymphocyte-to-C-reactive protein ratio for predicting clinical outcomes in patients with sepsis in intensive care unit: a retrospective single-center study 淋巴细胞-C 反应蛋白比值对重症监护病房脓毒症患者临床预后的预测价值:一项回顾性单中心研究
IF 5 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-13 DOI: 10.3389/fmolb.2024.1429372
Chao Song, Zhenkui Hu, Jinhui Zhang
{"title":"The value of lymphocyte-to-C-reactive protein ratio for predicting clinical outcomes in patients with sepsis in intensive care unit: a retrospective single-center study","authors":"Chao Song, Zhenkui Hu, Jinhui Zhang","doi":"10.3389/fmolb.2024.1429372","DOIUrl":"https://doi.org/10.3389/fmolb.2024.1429372","url":null,"abstract":"BackgroundThe lymphocyte-to-C-reactive protein ratio (LCR) was a novel biomarker of inflammation that had been implicated in various diseases. Nevertheless, the role of LCR in the context of sepsis patients admitted to the Intensive Care Unit (ICU) had not been thoroughly elucidated. This study aimed to determine the significance of the LCR in predicting the prognosis of sepsis patients within ICU.MethodsA sample of sepsis patients requiring ICU care was selected from the Affiliated Hospital of Jiangsu University. These patients were then segmented into four quartiles based on their LCR levels. The primary endpoint of the study was 30-day mortality and the secondary endpoint was the occurrence of Acute Kidney Injury (AKI). Survival analysis, via the Kaplan-Meier method and log-rank test, was conducted to assess survival rates. Cox proportional hazards regression and logistic regression models were employed to investigate the association between LCR and clinical outcomes. Additional subgroup analyses were conducted to evaluate the influence of other confounding factors on the relationship between LCR and patient outcomes.ResultsA total of 1,123 patients were enrolled in this study, with a median age of 75 (65–84) years, and 707 (63.0%) of them were male. The 30-day mortality rate was 28.1%, while the incidence of AKI was 45.6%. A progressive decrease in LCR levels was found to be associated with an increased cumulative incidence of 30-day mortality (log-rank <jats:italic>P</jats:italic> &amp;lt; 0.001). Multivariable Cox proportional hazards analyses demonstrated that LCR was an independent predictor of 30-day mortality [per 1-unit increase in LCR: HR (95%CI): 0.370 (0.142–0.963); <jats:italic>P</jats:italic> = 0.042]. Additionally, multivariable logistic regression analysis revealed a significant association between LCR and AKI occurrence [per 1-unit increase in LCR: OR (95%CI): 0.541 (0.307–0.953); <jats:italic>P</jats:italic> = 0.034]. Furthermore, subgroup analysis indicated a stronger correlation for patients aged over 65 years compared to those aged 65 or younger (<jats:italic>p</jats:italic> for interaction &amp;lt;0.05) in predicting 30-day mortality or AKI occurrence based on LCR.ConclusionA reduction in LCR was notably linked to 30-day mortality and the occurrence of AKI in sepsis patients. These findings suggested that LCR could potentially serve as a valuable tool in identifying sepsis patients at a heightened risk of adverse outcomes.","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"9 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification and mechanistic analysis of neurovascular coupling related biomarkers for diabetic macular edema 糖尿病黄斑水肿的神经血管耦合相关生物标记物的鉴定和机理分析
IF 5 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-13 DOI: 10.3389/fmolb.2024.1332842
Tianpeng Chen, Shufan Sheng, Jing Chen, Xiaole Wang, Yanxing Shang, Chengwei Duan, Caixia Liang, Yu Song, Dongmei Zhang
{"title":"Identification and mechanistic analysis of neurovascular coupling related biomarkers for diabetic macular edema","authors":"Tianpeng Chen, Shufan Sheng, Jing Chen, Xiaole Wang, Yanxing Shang, Chengwei Duan, Caixia Liang, Yu Song, Dongmei Zhang","doi":"10.3389/fmolb.2024.1332842","DOIUrl":"https://doi.org/10.3389/fmolb.2024.1332842","url":null,"abstract":"IntroductionDiabetic macular edema (DME) is a major cause of vision loss in the sick with diabetic retinopathy. The occurrence of DME is closely related to the breakdown of neurovascular coupling; however, its underlying mechanism has not been fully elucidated. The aim of this study was to investigate the diagnostic biomarkers and potential molecular mechanisms associated with neurovascular coupling in DME.MethodsThe differential expression analysis, STEM, and WGCNA were performed from GSE160306 to identify hub genes. The gene expression was validated by RT-qPCR. The relevant mechanisms of action were investigated through GO, KEGG, and GSEA analyses, as well as co-expression networks. Additionally, the LASSO regression analysis and a nomogram were used to demonstrate the diagnostic effectiveness of the model. Finally, the GenDoma platform was utilized to identify drugs with potential therapeutic effects on DME.ResultsNeurotrophic factor receptor (NGFR) was identified as a hub gene related to neurovascular coupling and DME. The expression of NGFR was verified by RT-qPCR in <jats:italic>vitro</jats:italic> cells. GSEA analysis indicated that high expression of NGFR may affect immunity and inflammatory pathway, thereby regulating neurovascular coupling and mediating the development of DME. The NGFR co-expression network was constructed, which exhibited the correlation with the neurotrophin signaling pathway. Moreover, a diagnostic model for DME based on NGFR and PREX1 demonstrated relatively good diagnostic performance using LASSO regression analysis and the nomogram. And then the GenDoma platform identified drugs with potential therapeutic effects on DME.ConclusionThe high expression of NGFR may lead to abnormal neurovascular coupling and participate in the occurrence of DME by regulating the immunity, inflammatory and neurotrophin signaling pathway. Detection of NGFR and related expression genes may be beneficial for monitoring the occurrence and development of DME.","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"53 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification of ATRNL1 and WNT9A as novel key genes and drug candidates in hypertrophic cardiomyopathy: integrative bioinformatics and experimental validation 将 ATRNL1 和 WNT9A 鉴定为肥厚型心肌病的新型关键基因和候选药物:综合生物信息学和实验验证
IF 5 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-12 DOI: 10.3389/fmolb.2024.1458434
Huabin He, Yanhui Liao, Yang Chen, Hao Qin, Longlong Hu, Shucai Xiao, Huijian Wang, Renqiang Yang
{"title":"Identification of ATRNL1 and WNT9A as novel key genes and drug candidates in hypertrophic cardiomyopathy: integrative bioinformatics and experimental validation","authors":"Huabin He, Yanhui Liao, Yang Chen, Hao Qin, Longlong Hu, Shucai Xiao, Huijian Wang, Renqiang Yang","doi":"10.3389/fmolb.2024.1458434","DOIUrl":"https://doi.org/10.3389/fmolb.2024.1458434","url":null,"abstract":"BackgroundHypertrophic cardiomyopathy (HCM) is a genetic disorder characterized by left ventricular hypertrophy that can lead to heart failure, arrhythmias, and sudden cardiac death. Despite extensive research, the molecular mechanisms underlying HCM are not fully understood, and effective treatments remain limited. By leveraging bioinformatics and experimental validation, this study aims to identify key genes and pathways involved in HCM, uncover novel drug candidates, and provide new insights into its pathogenesis and potential therapeutic strategies.MethodsCommonly upregulated and downregulated genes in hypertrophic cardiomyopathy (HCM) were identified using Gene Expression Omnibus (GEO) datasets, including three mRNA profiling datasets and one miRNA expression dataset. Enrichment analysis and hub-gene exploration were performed using interaction networks and consistent miRNA-mRNA matches. Potential drugs for HCM were screened. HCM cellular and animal models were established using isoproterenol. Key unstudied differentially expressed genes (DEGs) were validated. Animals were treated with novel potential drugs, and improvements in HCM were assessed via ultrasound metrics. Hematoxylin and eosin (H&amp;amp;E) staining was used to assess myocardial fibrosis. Immunohistochemistry was employed to detect DEGs in cellular experiments.ResultWe discovered 145 key upregulated and 149 downregulated DEGs associated with HCM development, among which there are eight core upregulated and seven core downregulated genes. There are 30 upregulated and six downregulated miRNAs. Between the six downregulated miRNAs and 1291 matched miRNAs (against eight core upregulated DEGs), there is one common miRNA, miR-1469. Using the CTD database, drugs that impact the expression/abundance/methylation/metabolic process of core DEGs (after the exclusion of toxic drugs) included acetaminophen, propylthiouracil, methapyrilene, triptolide, tretinoin, etc. In the HCM cell model, only <jats:italic>ATRNL1</jats:italic> and <jats:italic>WNT9A</jats:italic> were significantly increased. In the HCM animal model, propylthiouracil, miR-1469, and triptolide demonstrated varying degrees of therapeutic effects on HCM. Propylthiouracil, but not miR-1469 or triptolide, significantly inhibited the expression of <jats:italic>ATRNL1</jats:italic> in the HCM model, and all three drugs suppressed <jats:italic>WNT9A</jats:italic> expression.ConclusionWe identified several novel genes in HCM development, among which <jats:italic>ATRNL1</jats:italic> and <jats:italic>WNT9A</jats:italic> were validated by cell and animal models. A deficiency of hsa-miR-1469 may be a mechanism behind HCM development. Novel medications for HCM treatment include propylthiouracil and triptolide.","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"56 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Editorial: Lessons from external quality control in laboratory medicine: important implications for public health! 社论:实验室医学外部质量控制的经验教训:对公共卫生的重要影响!
IF 3.9 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-12 eCollection Date: 2024-01-01 DOI: 10.3389/fmolb.2024.1485193
Nathalie Weiss, Ingo Schellenberg, Klaus-Peter Hunfeld
{"title":"Editorial: Lessons from external quality control in laboratory medicine: important implications for public health!","authors":"Nathalie Weiss, Ingo Schellenberg, Klaus-Peter Hunfeld","doi":"10.3389/fmolb.2024.1485193","DOIUrl":"https://doi.org/10.3389/fmolb.2024.1485193","url":null,"abstract":"","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"11 ","pages":"1485193"},"PeriodicalIF":3.9,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11424928/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Copper metabolism in osteoarthritis and its relation to oxidative stress and ferroptosis in chondrocytes 骨关节炎中的铜代谢及其与氧化应激和软骨细胞中的铁蛋白沉积的关系
IF 5 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-11 DOI: 10.3389/fmolb.2024.1472492
Qingyuan Yu, Yanan Xiao, Mengqi Guan, Xianshuai Zhang, Jianan Yu, Mingze Han, Zhenhua Li
{"title":"Copper metabolism in osteoarthritis and its relation to oxidative stress and ferroptosis in chondrocytes","authors":"Qingyuan Yu, Yanan Xiao, Mengqi Guan, Xianshuai Zhang, Jianan Yu, Mingze Han, Zhenhua Li","doi":"10.3389/fmolb.2024.1472492","DOIUrl":"https://doi.org/10.3389/fmolb.2024.1472492","url":null,"abstract":"Ferroptosis, an iron-ion-dependent process of lipid peroxidation, damages the plasma membrane, leading to non-programmed cell death. Osteoarthritis (OA), a prevalent chronic degenerative joint disease among middle-aged and older adults, is characterized by chondrocyte damage or loss. Emerging evidence indicates that chondrocyte ferroptosis plays a role in OA development. However, most research has concentrated on ferroptosis regulation involving typical iron ions, potentially neglecting the significance of elevated copper ions in both serum and joint fluid of patients with OA. This review aims to fill this gap by systematically examining the interplay between copper metabolism, oxidative stress, ferroptosis, and copper-associated cell death in OA. It will provide a comprehensive overview of copper ions’ role in regulating ferroptosis and their dual role in OA. This approach seeks to offer new insights for further research, prevention, and treatment of OA.","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"55 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Label-free quantitative proteomic profiling reveals differential plasma protein expression in patients with obesity after treatment with liraglutide 无标记定量蛋白质组分析揭示了利拉鲁肽治疗后肥胖症患者血浆蛋白质表达的差异
IF 5 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-11 DOI: 10.3389/fmolb.2024.1458675
Afshan Masood, Hicham Benabdelkamel, Salini Scaria Joy, Abdulaziz Alhossan, Bashayr Alsuwayni, Ghalia Abdeen, Madhawi Aldhwayan, Nora A. Alfadda, Alexander Dimitri Miras, Assim A. Alfadda
{"title":"Label-free quantitative proteomic profiling reveals differential plasma protein expression in patients with obesity after treatment with liraglutide","authors":"Afshan Masood, Hicham Benabdelkamel, Salini Scaria Joy, Abdulaziz Alhossan, Bashayr Alsuwayni, Ghalia Abdeen, Madhawi Aldhwayan, Nora A. Alfadda, Alexander Dimitri Miras, Assim A. Alfadda","doi":"10.3389/fmolb.2024.1458675","DOIUrl":"https://doi.org/10.3389/fmolb.2024.1458675","url":null,"abstract":"IntroductionTreatment and management of obesity is clinically challenging. The inclusion of GLP-1 receptor agonists (GLP1RA) in the medical management of obesity has proven to be efficacious. However, mechanisms underlying the molecular changes arising from GLP1RA treatment in patients with obesity remain to be elucidated.MethodsA single-center, prospective study was undertaken to evaluate the changes in the plasma proteins after liraglutide 3 mg therapy in twenty patients (M/F: 7/13) with obesity (mean BMI 40.65 ± 3.7 kg/m<jats:sup>2</jats:sup>). Anthropometric and laboratory parameters were measured, and blood samples were collected at two time points: baseline, before initiating treatment (pretreatment group, PT), and after three months of receiving the full dose liraglutide 3 mg (posttreatment group, PoT). An untargeted label-free LC MSMS mass spectrometric approach combined with bioinformatics and network pathway analysis was used to determine changes in the proteomic profiles.ResultsThe mean age of the study participants was 36.0 ± 11.1 years. A statistically significant change was observed in weight, BMI and HbA1c levels between the PT and PoT groups (paired t-test, <jats:italic>P</jats:italic> &amp;lt; 0.001). A significant dysregulation was noted in the abundances of 151 proteins (31 up and 120 downregulated) between the two groups. The potential biomarkers were evaluated using receiver operating characteristic (ROC) curves. The top ten proteins (area under the curve (AUC) of 0.999 (95% CI)) were identified as potential biomarkers between PT and PoT groups and included Cystatin-B, major vault protein, and plastin-3, which were upregulated, whereas multimerin-2, large ribosomal P2, and proline–rich acidic protein 1 were downregulated in the PoT group compared with the PT group. The top network pathway identified using ingenuity pathway analysis (IPA), centered around dysregulation of MAPK, AKT, and PKc signaling pathways and related to cell-to-cell signaling and interaction, cellular assembly and organization, cellular compromise and a score of 46 with 25 focus proteins.DiscussionThrough label-free quantitative proteomic analysis, our study revealed significant dysregulation of plasma proteins after liraglutide 3 mg treatment in patients with obesity. The alterations in the proteomic profile between the PT and PoT groups demonstrated a decrease in levels of proteins involved in inflammation and oxidative stress pathways. On the other hand proteins involved in the glycolytic and lipolytic metabolic pathways as well as those participating in cytoskeletal and endothelial reorganization were observed to be increased. Understanding actions of liraglutide at a molecular and proteomic levels provides a holistic look into how liraglutide impacts metabolism, induces weight loss and improves overall metabolic health.","PeriodicalId":12465,"journal":{"name":"Frontiers in Molecular Biosciences","volume":"5 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retraction: Identification of a novel ferroptosis inducer for gastric cancer treatment using drug repurposing strategy. 撤回:利用药物再利用战略鉴定治疗胃癌的新型铁蛋白酶诱导剂
IF 3.9 3区 生物学
Frontiers in Molecular Biosciences Pub Date : 2024-09-11 eCollection Date: 2024-01-01 DOI: 10.3389/fmolb.2024.1491755
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