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Keywords = TRAF-interacting protein

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31 pages, 2867 KB  
Review
Dual Functionality of miRNAs During HIV Infection: From Viral Genome Suppression to Immune Response Modulation
by Anna M. Timofeeva, Kseniya S. Aulova and Georgy A. Nevinsky
Epigenomes 2026, 10(2), 39; https://doi.org/10.3390/epigenomes10020039 - 5 Jun 2026
Viewed by 380
Abstract
Background/Objectives: As important post-transcriptional and epigenetic regulators of gene expression, miRNAs play a pivotal role in modulating host–virus interactions. While prior reviews have addressed either direct miRNA–HIV genome interactions or miRNA-mediated immune modulation in isolation, the integrated dual functionality of these molecules has [...] Read more.
Background/Objectives: As important post-transcriptional and epigenetic regulators of gene expression, miRNAs play a pivotal role in modulating host–virus interactions. While prior reviews have addressed either direct miRNA–HIV genome interactions or miRNA-mediated immune modulation in isolation, the integrated dual functionality of these molecules has not been systematically characterized. This review aimed to comprehensively explore how miRNAs that target the HIV-1 genome simultaneously modulate key innate and adaptive host immune signaling pathways. The conceptual novelty of this study is determined not by the identification of previously unknown miRNA-target gene pairs, but by the systemic integration of two regulatory levels (direct inhibition of the viral genome and modulation of the host cell immune signaling pathways) within a unified analytical framework. Such an integrated approach reveals a proviral regulatory network that remains non-obvious when each of these levels is examined separately. Methods: A narrative review was conducted using PubMed, Scopus, Web of Science, and Google Scholar (all years through 2025). In Stage 1, publications reporting experimentally confirmed interactions between host miRNAs and the HIV-1 genome were identified, yielding a curated set of 15 miRNAs. In Stage 2, target genes for each miRNA were retrieved from miRTarBase, TarBase (experimentally validated) and TargetScan 8.0 (in silico predicted). In Stage 3, target genes were manually mapped to key immune signaling pathways (TLR, NF-κB, JAK-STAT). In Stage 4, targeted literature searches were performed for each miRNA–target gene pair to identify direct experimental evidence of interaction. All stages were performed by two independent researchers, with discrepancies resolved by a third. Results: Fifteen host miRNAs with experimentally confirmed binding to the HIV-1 genome were identified, targeting viral genes including nef, pol, vpr, gag, env, vif, and the 3′-UTR. Thirteen of these miRNAs were found to regulate components of major immune pathways. miR-92a-3p, miR-29a/b-3p, miR-150-5p, and miR-125b-5p emerged as the most pleiotropic regulators, simultaneously suppressing TLR signaling (TLR3, TLR7, TLR8, MyD88, TRAF3/6, IRAK1/4), NF-κB components (REL, RELA, NFKB1), JAK-STAT effectors (STAT1–3, STAT5A/B, JAK2), and negative regulators of cytokine signaling (SOCS and PIAS family proteins). miR-133b and miR-196b-5p were found to selectively regulate SOCS/PIAS proteins without involvement in other analyzed pathways, suggesting potential for selective therapeutic targeting. Conclusions: The analyzed miRNAs exhibit functional dualism, acting as direct post-transcriptional suppressors of the HIV-1 genome while simultaneously functioning as epigenetic modulators of host immune signaling. These two modes of action are not independent but together form a conceptual framework of a self-reinforcing proviral regulatory network that, based on the synthesis of published evidence, is proposed to promote viral latency and immune evasion. The identified miRNAs represent promising, albeit complex, targets for novel therapeutic strategies aimed at eliminating latent HIV reservoirs. Full article
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28 pages, 10184 KB  
Review
The Role of TRAF6 in Cancer: From Molecular Mechanisms to Therapeutic Strategies
by Shuai Xiao, Dandan Song, Yeping Yu, Lingli Tian, Xiaozhen Xu, Wenying Qin, Rui Zhang, Hao Lyu, Dong Guo, Qi Zhang, Xing-Zhen Chen, Jingfeng Tang and Cefan Zhou
Cells 2026, 15(9), 818; https://doi.org/10.3390/cells15090818 - 30 Apr 2026
Viewed by 784
Abstract
Tumor necrosis factor receptor-associated factor 6 (TRAF6) is an E3 ubiquitin ligase that plays a crucial role in inflammation, immune responses, and tumor development. It was reported that TRAF6 primarily catalyzes K63-linked polyubiquitination to stabilize substrate proteins, thereby facilitating the malignant phenotype of [...] Read more.
Tumor necrosis factor receptor-associated factor 6 (TRAF6) is an E3 ubiquitin ligase that plays a crucial role in inflammation, immune responses, and tumor development. It was reported that TRAF6 primarily catalyzes K63-linked polyubiquitination to stabilize substrate proteins, thereby facilitating the malignant phenotype of tumors. Beyond its cytoplasmic roles, TRAF6 undergoes nuclear translocation in response to specific stimuli, where it interacts with chromatin modifiers. TRAF6 acts as a central mediator in key signaling pathways downstream of the Toll-like receptor, interleukin-1 receptor, and tumor necrosis factor receptor superfamilies, including NF-κB activation. TRAF6 exerts diverse oncogenic functions, including promoting cell proliferation, migration, metastasis, immune evasion, and therapy resistance. This involves modulating cellular pathways such as NF-κB and MAPK signaling, which contribute to malignant progression. Aberrant TRAF6 activation contributes to the pathogenesis of multiple malignancies, including colorectal cancer, melanoma, hepatocellular carcinoma, and acute myeloid leukemia, making it a promising therapeutic target for cancer treatment. This review summarizes the structural features, substrate diversity, and multifaceted roles of TRAF6 in cancer, as well as the development of TRAF6-targeting drugs and strategies. We hope this review can provide a comprehensive perspective on TRAF6-targeted therapeutic strategies for cancer. Full article
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22 pages, 10164 KB  
Article
Multi-Omics and Molecular Docking Reveal That Oats and Oat Bran Alleviate Chronic Colitis Via IL-17 Pathway Modulation
by Wen Duan, Tong Li, Yuyu Zhang, Baoguo Sun and Rui Hai Liu
Nutrients 2026, 18(3), 407; https://doi.org/10.3390/nu18030407 - 26 Jan 2026
Viewed by 815
Abstract
Background/Objectives: Diet plays a critical role in the development of inflammatory bowel disease (IBD). Our previous work demonstrated that oats and oat bran alleviate dextran sulfate sodium (DSS)-induced colitis in mice by modulating the gut microbiota. Methods: To further explore the underlying mechanisms, [...] Read more.
Background/Objectives: Diet plays a critical role in the development of inflammatory bowel disease (IBD). Our previous work demonstrated that oats and oat bran alleviate dextran sulfate sodium (DSS)-induced colitis in mice by modulating the gut microbiota. Methods: To further explore the underlying mechanisms, this study combined metabolomic and transcriptomic analyses to systematically compare the effects of whole oats and oat bran interventions on chronic colitis. Results: Untargeted metabolomics analysis identified three key metabolites, ursodeoxycholic acid, 3-(3-hydroxyphenyl)propionic acid, and avenanthramide C. The interactions between these metabolites and core proteins of the IL-17 signaling pathway (IL-17A, TRAF6, and ACT1) were evaluated via molecular docking. Transcriptomic and RT-qPCR analyses revealed that both oats and oat bran interventions modulated the IL-17, PI3K-Akt, and TNF signaling pathways. These treatments significantly upregulated the expression of tight junction proteins (claudin-1, claudin-5, occludin) while reducing levels of inflammatory cytokines and chemokines. Molecular docking results demonstrated stable binding between the three metabolites and target proteins primarily through hydrogen bonding and electrostatic interactions, with ursodeoxycholic acid exhibiting the highest binding affinity. Conclusions: Collectively, these findings suggest that oats and oat bran may alleviate chronic colitis by modulating the IL-17 signaling pathway and enhancing intestinal barrier function. Full article
(This article belongs to the Section Nutritional Immunology)
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20 pages, 12843 KB  
Article
Network Analysis to Identify MicroRNAs Involved in Alzheimer’s Disease and to Improve Drug Prioritization
by Aldo Reyna and Simona Panni
Biomedicines 2026, 14(1), 147; https://doi.org/10.3390/biomedicines14010147 - 11 Jan 2026
Cited by 1 | Viewed by 1211
Abstract
Background: Advances in the understanding of molecular mechanisms of human diseases, along with the generation of large amounts of molecular datasets, have highlighted the variability between patients and the need to tailor therapies to individual characteristics. In particular, RNA-based therapies hold strong [...] Read more.
Background: Advances in the understanding of molecular mechanisms of human diseases, along with the generation of large amounts of molecular datasets, have highlighted the variability between patients and the need to tailor therapies to individual characteristics. In particular, RNA-based therapies hold strong promise for new drug development, as they can be easily designed to target specific molecules. Gene and protein functions, however, operate within a highly interconnected network, and inhibiting a single function or repressing a single gene may lead to unexpected secondary effects. In this study, we focused on genes associated with Alzheimer’s disease, a progressive neurodegenerative disorder characterized by complex pathological processes leading to cognitive decline and dementia. Its hallmark features include the accumulation of extracellular amyloid-β plaques and intracellular neurofibrillary tangles composed of hyperphosphorylated tau. Methods: We built a protein interaction network subgraph seeded on five Alzheimer’s-associated genes, including tau and amyloid-β precursor, and integrated it with microRNAs in order to select regulated nodes, study the effects of their depletion on signaling pathways, and prioritize targets for microRNA-based therapeutic approaches. Results: We identified nine protein nodes as potential candidates (Pik3R1, Bace1, Traf6, Gsk3b, Akt1, Cdk2, Adam10, Mapk3 and Apoe) and performed in silico node depletion to simulate the effects of microRNA regulation. Conclusions: Despite intrinsic limitations of the approach, such as the incompleteness of the available information or possible false associations, the present work shows clear potential for drug design and target prioritization and underscores the need for reliable and comprehensive maps of interactions and pathways. Full article
(This article belongs to the Special Issue Bioinformatics Analysis of RNA for Human Health and Disease)
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13 pages, 769 KB  
Review
Enterovirus D68 Sequence Variations and Pathogenicity: A Review
by Yi Zhu, Liting Wang and Jun Shen
Viruses 2026, 18(1), 73; https://doi.org/10.3390/v18010073 - 4 Jan 2026
Cited by 2 | Viewed by 1463
Abstract
Enterovirus D68 (EV-D68), a neurotropic respiratory pathogen, poses a considerable clinical threat through its link to pediatric acute flaccid myelitis (AFM) and severe respiratory illness. The possibility of recurrent epidemics, evidenced since the 2014 outbreak, remains a major concern. Genomic determinants of virulence [...] Read more.
Enterovirus D68 (EV-D68), a neurotropic respiratory pathogen, poses a considerable clinical threat through its link to pediatric acute flaccid myelitis (AFM) and severe respiratory illness. The possibility of recurrent epidemics, evidenced since the 2014 outbreak, remains a major concern. Genomic determinants of virulence are central to this threat. Sequence variations that affect host–receptor interactions, immune evasion, and replication efficiency serve as critical modifiers of pathogenicity. This article systematically reviews the evidence for specific genomic sites that enhance EV-D68 virulence, focusing on three critical regions: the VP1 receptor-binding site, the 2Apro/TRAF3 cleavage site, and the 3Cpro immunoregulatory region. Mutations in the VP1 receptor-binding site can alter affinity for host receptors such as sialic acid, heparan sulfate, and MFSD6, thereby shaping viral entry and tissue tropism. Alterations in the 2Apro/TRAF3 cleavage site may impair proteolytic cleavage of host TRAF3, attenuating immune evasion and reducing viral pathogenicity. Variations in the 3Cpro region affect its efficiency in cleaving host proteins involved in translation and autophagy, ultimately modulating viral replication and antiviral responses. Finally, we propose that monitoring for mutations in these key virulence determinants, particularly within the surface-exposed VP1, is essential for effective outbreak preparedness. Full article
(This article belongs to the Special Issue An Update on Enterovirus Research, 2nd Edition)
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15 pages, 1502 KB  
Review
Developmental Pathways of Immature CD11c+ Myeloid Dendritic Cells (mDCs) for Bona Fide Osteoclastogenesis Revisited: A Narrative Review
by Yen Chun G. Liu, Chen-Yi Liang and Andy Yen-Tung Teng
Int. J. Mol. Sci. 2026, 27(1), 480; https://doi.org/10.3390/ijms27010480 - 2 Jan 2026
Viewed by 757
Abstract
Recent studies support that hematopoietic stem cell (HSC)-derived myeloid dendritic cells, monocytes/macrophages (Mo/Mϕ), and osteoclast precursors (OCps) share common progenitor(s) during development. This occurs mainly through receptor activator of NF-κB ligand (RANKL) signaling via its cytoplasmic adaptor protein complex (TRAF6) to subsequent osteoclastogenesis [...] Read more.
Recent studies support that hematopoietic stem cell (HSC)-derived myeloid dendritic cells, monocytes/macrophages (Mo/Mϕ), and osteoclast precursors (OCps) share common progenitor(s) during development. This occurs mainly through receptor activator of NF-κB ligand (RANKL) signaling via its cytoplasmic adaptor protein complex (TRAF6) to subsequent osteoclastogenesis for bone loss and/or remodeling. Presently, mounting new evidence suggests that erythro-myeloid progenitor (EMP)-derived macrophages (Mϕ) and HSC-derived monocytes (Mo) produce embryonic, fetal, and postnatal OCp pools (i.e., primitive OCp), pinpointing a complex network of multiple OCp developmental origins. However, their ontogenic developments, lineage interactions, and contributions to the alternative osteoclastogenesis—in contrast to overall bone remodeling or loss—remain elusive. Interestingly, studies have also elucidated the contributions of immature CD11c+ myeloid DC-like OCps to osteoclastogenesis, with or without the classical so-called Mo/Mϕ-derived OCp subsets, and described that CD11c+ myeloid DCs (mDCs) develop into functionally active OCs; meanwhile, the cytokine TGF-β mediates a stepwise regulation of de novo immature mDCs/OCps through distinct crosstalk(s) with IL-17, an unrecognized interaction featuring TRAF6(−/−)CD11c+ mDDOCps that coexist and proficiently colocalize in the local environment to drive a bona fide route for alternative osteoclastogenesis in vivo. Collectively, new findings—critically hinged on progenitor osteoclastogenic pathways (primitive OCps, mDCs/OCps, osteomorphs, etc.) and involving classical and/or alternative routes to inflammation-induced bone loss—are discussed via the illustrated schemes. This review highlights plausible ontogenic vs. principal or alternative developmental paths and their consequential downstream effects. Full article
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24 pages, 8095 KB  
Article
Integrated Bioinformatics and Experimental Analysis Revealed Crosstalk Between IL-6, Autophagy, Ubiquitination, and Key miRNAs in Female Infertility: Insights from Ovarian Endometriosis and Polycystic Ovary Syndrome
by Saber Nahdi, Maria Arafah and Abdel Halim Harrath
Cells 2025, 14(21), 1693; https://doi.org/10.3390/cells14211693 - 28 Oct 2025
Cited by 6 | Viewed by 1595
Abstract
Female infertility, affecting millions worldwide, involves complex molecular mechanisms such as chronic inflammation, impaired cellular death, and protein regulation. This study explores how the cytokine IL-6, the autophagy marker LC3, ubiquitination process, and three miRNAs, miR-146a-5p, miR-9-5p, and miR-9-3p, contribute to the control [...] Read more.
Female infertility, affecting millions worldwide, involves complex molecular mechanisms such as chronic inflammation, impaired cellular death, and protein regulation. This study explores how the cytokine IL-6, the autophagy marker LC3, ubiquitination process, and three miRNAs, miR-146a-5p, miR-9-5p, and miR-9-3p, contribute to the control of ovarian function and female infertility. Two expression profile datasets (GSE199225 and GSE146856) were screened and downloaded from GEO. DEGs were screened using the GEO2R and ggVennDiagram tools. The three miRNAs were retrieved from datasets using the multiMiR tool, and IL6-targeted genes were retrieved from MSigDB. IL6 and miRNA interaction networks were constructed. Further, the cross-correlation of LC3 and ubiquitination with the DEGs associated miRNAs was demonstrated. Meanwhile, GO/KEGG pathway enrichment analyses and molecular network interaction analysis were performed. Lastly, immunohistochemistry and quantitative PCR (qPCR) were used to confirm the expression of IL6, LC3, and miRNA in ovarian endometrial tissues compared to control tissues. The results showed that IL-6 drives inflammation in conditions of PCOS and ovarian endometriosis, which then disrupts ovulation and embryo implantation. miR-146a-5p reduced inflammation by targeting the gene TRAF6, while miR-9-5p regulated protein degradation via SQSTM1. In agreement with the bioinformatic approach, experimental analysis revealed reduced IL6 protein expression in ovarian endometriosis tissues while the mRNA IL6 level was increased, suggesting the presence of post-transcriptional regulatory mechanisms that act to limit excessive inflammation, probably through miRNAs. Indeed, the levels of miR-146a-5, which plays a role in immune modulation and inflammatory signaling, were significantly upregulated. Interestingly, an alteration in autophagic markers revealed by elevated LC3 was also observed. Aligned with these experimental data, bioinformatic analysis showed that autophagy genes LC3 and ATG5 and ubiquitination processes were tightly linked to ovarian health, with disruptions accelerating follicle loss and oxidative damage. In conclusion, the results showed that IL-6, miRNAs, and autophagy processes work together to control inflammation and cellular repair in ovarian disorders. This study opens new avenues for targeted treatments to improve fertility outcomes by connecting molecular networks to clinical insights. Full article
(This article belongs to the Special Issue Computational Biophysics in Cellular Biological Systems)
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23 pages, 3542 KB  
Article
Modulation of Nuclear Factor Kappa B Signaling and microRNA Profiles by Adalimumab in LPS-Stimulated Keratinocytes
by Aleksandra Plata-Babula, Wojciech Kulej, Paweł Ordon, Julia Gajdeczka, Martyna Stefaniak, Artur Chwalba, Piotr Gościniewicz, Tomasz Kulpok and Beniamin Oskar Grabarek
Int. J. Mol. Sci. 2025, 26(20), 10035; https://doi.org/10.3390/ijms262010035 - 15 Oct 2025
Cited by 2 | Viewed by 1273
Abstract
Psoriasis is a chronic inflammatory skin disease characterized by keratinocyte hyperactivation and dysregulated cytokine signaling, with nuclear factor kappa B (NF-κB), a master transcription factor that regulates immune and inflammatory gene expression, playing a central role. Adalimumab, a monoclonal antibody that inhibits tumor [...] Read more.
Psoriasis is a chronic inflammatory skin disease characterized by keratinocyte hyperactivation and dysregulated cytokine signaling, with nuclear factor kappa B (NF-κB), a master transcription factor that regulates immune and inflammatory gene expression, playing a central role. Adalimumab, a monoclonal antibody that inhibits tumor necrosis factor alpha (TNF-α), is widely used in psoriasis therapy, yet its molecular effects on NF-κB-associated genes and microRNAs (miRNAs) in keratinocytes remain insufficiently defined. In this study, immortalized human keratinocytes (HaCaT cells) were exposed to lipopolysaccharide (LPS) to induce inflammatory stress and treated with adalimumab for 2, 8, and 24 h. Transcriptome-wide profiling was performed using messenger RNA (mRNA) and miRNA microarrays, followed by validation with reverse transcription quantitative polymerase chain reaction (RT-qPCR) and enzyme-linked immunosorbent assay (ELISA). Bioinformatic analyses included prediction of miRNA–mRNA interactions, construction of protein–protein interaction (PPI) networks, and gene ontology (GO) enrichment. Adalimumab reversed LPS-induced upregulation of NF-κB-associated genes, including inhibitor of nuclear factor kappa-B kinase subunit beta (IKBKB), interleukin-1 receptor-associated kinase 1 (IRAK1), TNF receptor-associated factor 2 (TRAF2), mitogen-activated protein kinase kinase kinase 7 (MAP3K7), and TNF alpha-induced protein 3 (TNFAIP3), with concordant changes observed at the protein level. Several regulatory miRNAs, notably miR-1297, miR-30a, miR-95-5p, miR-125b, and miR-4329, showed reciprocal expression changes consistent with anti-inflammatory activity. STRING analysis identified IKBKB as a central hub in the PPI network, while GO enrichment highlighted immune regulation, apoptosis, and NF-κB signaling. These findings demonstrate that adalimumab modulates NF-κB activity in keratinocytes through coordinated regulation of gene, protein, and miRNA expression, providing mechanistic insight into TNF-α blockade in psoriasis. Full article
(This article belongs to the Collection Advances in Cell and Molecular Biology)
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11 pages, 833 KB  
Article
SHP-1 Promotes the Replication of Porcine Epidemic Diarrhea Virus by Inhibiting TRAF3-Mediated Type I Interferon Immune Responses
by Jiaqing Hu, Yuxin Kong, Yi Liu, Ning Li and Shijin Jiang
Pathogens 2025, 14(10), 1014; https://doi.org/10.3390/pathogens14101014 - 7 Oct 2025
Viewed by 933
Abstract
Porcine epidemic diarrhea virus (PEDV), a member of the genus Alpha coronavirus, is one of the main pathogens causing piglet diarrhea. PEDV can enhance its replication by regulating host protein function. The tyrosine phosphatase src homology 2 domain-containing PTP (SHP-1) acts as a [...] Read more.
Porcine epidemic diarrhea virus (PEDV), a member of the genus Alpha coronavirus, is one of the main pathogens causing piglet diarrhea. PEDV can enhance its replication by regulating host protein function. The tyrosine phosphatase src homology 2 domain-containing PTP (SHP-1) acts as a host natural immune protein capable of influencing viral replication, but there are no studies on the regulation of virus replication by pig SHP-1. In this study, we expressed porcine SHP-1 protein and examined its interaction with PEDV as well as its potential role in PEDV infection. The results showed that SHP-1 overexpression in porcine kidney cells (PK15) significantly increased the mRNA level of viral S protein in a dose-dependent manner. In contrast, SHP-1 knockdown reduced S gene expression, indicating that SHP-1 promoted PEDV replication. Overexpression of SHP-1 had an inhibitory effect on IFN-β, TNF-α, ISG15, and CXCL10, while this inhibition was reduced as SHP-1 expression decreased. Furthermore, we found that SHP-1 interacted with TNF receptor-associated factor 3 (TRAF3) and inhibited its K63-linked ubiquitination, suppressing the expression of IFN-β and ISGs and facilitating PEDV replication. The study provided new insights for the prevention and control of porcine epidemic diarrhea. Full article
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20 pages, 1126 KB  
Review
Review of the Role of TRAF7 in Brain Endothelial Integrity and Cerebrovascular Aging
by Jennifer Ihuoma, Sherwin Tavakol, Sharon Negri, Cade Ballard, Khanh Phan, Albert Orock, Zeke Reyff, Madison Milan, Eva Troyano-Rodriguez, Rakesh Rudraboina, Anna Csiszar, Anthony C. Johnson, Ian F. Dunn and Stefano Tarantini
Life 2025, 15(8), 1280; https://doi.org/10.3390/life15081280 - 12 Aug 2025
Cited by 7 | Viewed by 2301
Abstract
Tumor necrosis factor (TNF) receptor-associated factor 7 (TRAF7) is a signal transducer in the TNF receptor superfamily. TRAF7 is unique among its superfamily in that it does not contain a TRAF-C domain but does contain WD-40 domains. TRAF7 interacts with mitogen-activated protein kinases [...] Read more.
Tumor necrosis factor (TNF) receptor-associated factor 7 (TRAF7) is a signal transducer in the TNF receptor superfamily. TRAF7 is unique among its superfamily in that it does not contain a TRAF-C domain but does contain WD-40 domains. TRAF7 interacts with mitogen-activated protein kinases (MAPK), which are known regulators of inflammation and shear stress response. Notably, these molecular interactions have profound implications for the function of brain endothelial cells (ECs), which are pivotal for sustaining the integrity of the blood–brain barrier (BBB), orchestrating neurovascular coupling (NVC), and modulating the vascular architecture. By directly influencing MAPK signaling pathways, particularly the shear stress-responsive MAPK kinase kinase 3 (MEKK3)–MAPK kinase 5 (MEK5)–extracellular-regulated protein kinase 5 (ERK5) cascade, TRAF7 contributes to vascular homeostasis, as exemplified by its role in phosphorylating ERK5. Such molecular events underpin the capacity of brain ECs to regulate substance exchange, adjust blood flow in response to neural activity, and maintain efficient cerebral perfusion, all of which are essential for preserving brain health and cognitive performance. By synthesizing the current evidence regarding TRAF7’s molecular functions and its impact on brain endothelial integrity, cerebrovascular aging, and exploring implications for therapeutic strategies targeting vascular dysfunction in the aging brain, this review fills a crucial gap in the literature. Given the limited number of original studies directly addressing these contexts, the review will integrate broader insights from related literature to provide a foundational overview for future research in this developing field. The culmination of this literature will provide a rationale for the development of novel TRAF7-targeted therapies to restore vascular integrity in the context of aging, which could maintain cognitive health. Although TRAF7 has been implicated in regulating endothelial permeability during inflammation, its precise functions in brain ECs and the subsequent effects on cerebrovascular structure and cognitive function remain to be fully elucidated. Full article
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16 pages, 3031 KB  
Article
Histopathological and Transcriptional Changes in Silkworm Larval Gonads in Response to Chlorfenapyr Exposure
by Tao Li, Changxiong Hu, Zenghu Liu, Qiongyan Li, Yonghui Fan, Pengfei Liao, Min Liu, Weike Yang, Xingxing Li and Zhanpeng Dong
Insects 2025, 16(6), 619; https://doi.org/10.3390/insects16060619 - 11 Jun 2025
Cited by 2 | Viewed by 2078
Abstract
Chlorfenapyr is a widely used insecticide known to harm non-target insects, but its effects on reproductive development in the silkworm (Bombyx mori L.) remain incompletely understood. In this study, we investigated the histopathological and transcriptional changes in the gonads (ovaries and testes) [...] Read more.
Chlorfenapyr is a widely used insecticide known to harm non-target insects, but its effects on reproductive development in the silkworm (Bombyx mori L.) remain incompletely understood. In this study, we investigated the histopathological and transcriptional changes in the gonads (ovaries and testes) of newly molted fifth-instar silkworm larvae exposed to chlorfenapyr. Histopathological analysis revealed delayed gonadal development, a reduction in oogonia and oocytes in the ovaries, and decreased numbers of spermatocytes in the testes. Transcriptome analysis identified significant differentially expressed genes (DEGs), mainly enriched in pathways such as “Drug metabolism—cytochrome P450”, “Insect hormone biosynthesis”, and “Ribosome”. Key up-regulated genes included members of the cytochrome P450 family (CYP6B5, CYP9f2, CYP6B6), glutathione S-transferases (GSTT1, GST1), and juvenile hormone-related enzymes (JHAMT, JHEH), indicating active detoxification and hormonal regulation responses. Several transcription factor families, particularly C2H2, HB-other, and TRAF, exhibited altered expression, suggesting roles in stress adaptation. Protein–protein interaction (PPI) network analysis identified hub genes such as EcR, Kr-h1, and various ribosomal proteins, highlighting their potential involvement in reproductive development. Quantitative PCR (qPCR) validated the transcriptomic data, confirming the reliability of the results. Overall, these findings enhance our understanding of chlorfenapyr’s impact on silkworm reproductive development and the underlying molecular mechanisms, providing valuable insights for sustainable pest management and ecological risk assessment of insecticides. Full article
(This article belongs to the Section Insect Physiology, Reproduction and Development)
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26 pages, 4568 KB  
Article
Insights into Functions of Universal Stress Proteins Encoded by Genomes of Gastric Cancer Pathogen Helicobacter pylori and Related Bacteria
by Raphael D. Isokpehi, Shaneka S. Simmons, Angela U. Makolo, Antoinesha L. Hollman, Solayide A. Adesida, Olabisi O. Ojo and Amos O. Abioye
Pathogens 2025, 14(3), 275; https://doi.org/10.3390/pathogens14030275 - 13 Mar 2025
Viewed by 2509
Abstract
The genes that encode the universal stress protein (USP) family domain (pfam00582) aid the survival of bacteria in specific host or habitat-induced stress conditions. Genome sequencing revealed that the genome of Helicobacter pylori, a gastric cancer pathogen, typically contains one USP gene, [...] Read more.
The genes that encode the universal stress protein (USP) family domain (pfam00582) aid the survival of bacteria in specific host or habitat-induced stress conditions. Genome sequencing revealed that the genome of Helicobacter pylori, a gastric cancer pathogen, typically contains one USP gene, while related helicobacters have one or two distinct USP genes. However, insights into the functions of Helicobacteraceae (Helicobacter and Wolinella) USP genes are still limited to inferences from large-scale genome sequencing. Thus, we have combined bioinformatics and visual analytics approaches to conduct a more comprehensive data investigation of a set of 1045 universal stress protein sequences encoded in 1014 genomes including 785 Helicobacter pylori genomes. The study generated a representative set of 183 USP sequences consisting of 180 Helicobacter sequences, two Wolinella succinogenes sequences, and a sequence from a related campylobacteria. We used the amino acid residues and positions of the 12 possible functional sites in 1030 sequences to identify 25 functional sites patterns for guiding studies on functional interactions of Helicobacteraceae USPs with ATP and other molecules. Genomic context searches and analysis identified USP genes of gastric and enterohepatic helicobacters that are adjacent or in operons with genes for proteins responsive to DNA-damaging oxidative stress (ATP-dependent proteases: ClpS and ClpA); and DNA uptake proteins (natural competence for transformation proteins: ComB6, ComB7, ComB8, ComB9, ComB10, ComBE, and conjugative transfer signal peptidase TraF). Since transcriptomic evidence indicates that oxidative stress and the presence of virulence-associated genes regulate the transcription of H. pylori USP gene, we recommend further research on Helicobacter USP genes and their neighboring genes in oxidative stress response and virulence of helicobacters. To facilitate the reuse of data and research, we produced interactive analytics resources of a dataset composed of values for variables including phylogeography of H. pylori strains, protein sequence features, and gene neighborhood. Full article
(This article belongs to the Section Bacterial Pathogens)
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20 pages, 12976 KB  
Article
1′-Acetoxychavicol Acetate Selectively Downregulates Tumor Necrosis Factor Receptor-Associated Factor 2 (TRAF2) Expression
by Chihiro Moriwaki, Shingo Takahashi, Nhat Thi Vu, Yasunobu Miyake and Takao Kataoka
Molecules 2025, 30(6), 1243; https://doi.org/10.3390/molecules30061243 - 10 Mar 2025
Cited by 1 | Viewed by 1610
Abstract
1′-Acetoxychavicol acetate (ACA) is a natural compound derived from rhizomes of the Zingiberaceae family that suppresses the nuclear factor κB (NF-κB) signaling pathway; however, the underlying mechanisms remain unclear. Therefore, the present study investigated the molecular mechanisms by which ACA inhibits the NF-κB [...] Read more.
1′-Acetoxychavicol acetate (ACA) is a natural compound derived from rhizomes of the Zingiberaceae family that suppresses the nuclear factor κB (NF-κB) signaling pathway; however, the underlying mechanisms remain unclear. Therefore, the present study investigated the molecular mechanisms by which ACA inhibits the NF-κB signaling pathway in human lung adenocarcinoma A549 cells. The results obtained showed ACA decreased tumor necrosis factor (TNF)-α-induced intercellular adhesion molecule-1 (ICAM-1) expression in A549 cells. It also inhibited TNF-α-induced ICAM-1 mRNA expression and ICAM-1 promoter-driven and NF-κB-responsive luciferase reporter activities. Furthermore, the TNF-α-induced degradation of the inhibitor of NF-κB α protein in the NF-κB signaling pathway was suppressed by ACA. Although ACA did not affect TNF receptor 1, TNF receptor-associated death domain, or receptor-interacting protein kinase 1 protein expression, it selectively downregulated TNF receptor-associated factor 2 (TRAF2) protein expression. The proteasome inhibitor MG-132, but not inhibitors of caspases or lysosomal degradation, attenuated ACA-induced reductions in TRAF2 expression. ACA also downregulated TRAF2 protein expression in human fibrosarcoma HT-1080 cells. This is the first study to demonstrate that ACA selectively downregulates TRAF2 protein expression. Full article
(This article belongs to the Special Issue Natural Products with Pharmaceutical Activities)
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25 pages, 2423 KB  
Article
Molecular Immune Responses of Ruditapes decussatus to Vibrio Infection at Different Temperatures: Expression of Key Genes and Resilience-Associated Single Nucleotide Polymorphisms
by Dimitrios K. Papadopoulos, Ioannis A. Giantsis, Athanasios Lattos, Konstantina Bitchava and Basile Michaelidis
Fishes 2025, 10(2), 72; https://doi.org/10.3390/fishes10020072 - 11 Feb 2025
Cited by 5 | Viewed by 2254
Abstract
The impact of pathogenic Vibrio on bivalves is expected to be aggravated by global warming, posing a growing threat to aquaculture. Clam production has been particularly vulnerable, with significant losses attributed to the lack of pathogen-resistant strains. In this study, the mantle cavity [...] Read more.
The impact of pathogenic Vibrio on bivalves is expected to be aggravated by global warming, posing a growing threat to aquaculture. Clam production has been particularly vulnerable, with significant losses attributed to the lack of pathogen-resistant strains. In this study, the mantle cavity of the grooved carpet shell clam Ruditapes decussatus (Linnaeus, 1758) was injected with Vibrio splendidus at 18 °C, 22 °C, and 24 °C and the transcription of the phagelysozyme, Cu-Zn superoxide dismutase (Cu-Zn sod), tumor necrosis factor receptor associated factor 6 (traf6), inhibitor of NF-κB (IκB), and Fas-associated protein with death domain (fadd) genes were assessed during a 20-day period. Additionally, the coding sequences of lysozyme, fadd, and IκB in Ruditapes decussatus were characterized for the first time, and SNPs were identified. Some SNPs showed significantly different distributions between infection-resistant and infection-susceptible individuals. Infected clams experienced increased mortality at elevated temperatures. Lysozyme mRNA was upregulated in infected groups across all temperatures. The sustained increase on day 20, coinciding with elevated traf6 mRNA, suggests a prolonged activation of the immune response. Cu-Zn sod transcription at 18 °C and 22 °C peaked on day 7 and returned to control levels by day 20, indicating an effective immune response, while at 24 °C, infected animals showed a continuously increased transcription. IκΒ and traf6 transcription, reflecting NF-κB pathway activity, varied with temperature and showed transient stimulation at higher temperatures. The pattern of fadd expression indicated a late induction of apoptosis, particularly at 18 °C and 24 °C. Overall, this study illustrates the involvement of five key genes in host–pathogen interactions and identifies potential markers for selection for Vibrio resistance in Ruditapes decussatus. However, given the weak correlation observed, further research is needed on the link between these polymorphisms and pathogen resilience. Full article
(This article belongs to the Special Issue Prevention and Control of Aquatic Animal Diseases)
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19 pages, 18487 KB  
Article
Investigating the Impact of Circulating MicroRNAs on Knee and Hip Osteoarthritis: Causal Links, Biological Mechanisms, and Drug Interactions
by Shanni Li, Yihui Peng, Yang Yu, Hongjun Xu, Zhaojing Yin, Yiyang Du, Mingyang Ma, Zhongyin Ji and Wenwei Qian
Int. J. Mol. Sci. 2025, 26(1), 283; https://doi.org/10.3390/ijms26010283 - 31 Dec 2024
Cited by 18 | Viewed by 3319
Abstract
Osteoarthritis (OA), particularly in the knee and hip, poses a significant global health challenge due to limited therapeutic options. To elucidate the molecular mechanisms of OA and identify potential biomarkers and therapeutic targets, we utilized genome-wide association studies (GWAS) and cis-miRNA expression quantitative [...] Read more.
Osteoarthritis (OA), particularly in the knee and hip, poses a significant global health challenge due to limited therapeutic options. To elucidate the molecular mechanisms of OA and identify potential biomarkers and therapeutic targets, we utilized genome-wide association studies (GWAS) and cis-miRNA expression quantitative trait loci (cis-miR-eQTL) datasets to identify miRNAs associated with OA, revealing 16 that were linked to knee OA and 21 to hip OA. Among these, hsa-miR-1303 was significantly upregulated in both knee and hip OA (IVW: p = 6.8164×1036 and 4.7919×102 respectively, OR > 1) and identified as a key factor in disease progression. Hsa-miR-1303 potentially regulates 30 genes involved in critical signaling pathways, such as the neurotrophin signaling pathway, and interacts with competing endogenous RNAs (ceRNAs) like circ_0041843 and LINC01338, thereby influencing key regulatory proteins such as SUMO2 and PARP1. Pharmacologically, hsa-miR-1303 targets nine druggable genes, including NRAS, H2AZ1, and RPS3, which have implications for drugs like cantharidin and diindolylmethane, potentially critical for developing novel OA treatments. Conversely, hsa-miR-125a-5p and hsa-miR-125b-5p, which are downregulated in both knee and hip OA, are associated with pathways such as HIF-1 and JAK-STAT, which modulate apoptotic signaling and transcriptional regulation. These miRNAs also interact with ceRNAs such as circ_0000254 and SPACA6P-AS, impacting proteins like STAT3, MCL1, and TRAF6. A drug interaction analysis identified 47 potential treatments, including Resveratrol and Acetaminophen, suggesting new therapeutic possibilities for OA management. This study not only highlights the role of miRNAs like hsa-miR-1303 and hsa-miR-125 in OA but also opens avenues for miRNA-based therapeutic development. Full article
(This article belongs to the Section Molecular Pharmacology)
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