341. Advances in epigenetic treatment of adult T-cell leukemia/lymphoma: a comprehensive review.
作者: Arash Letafati.;Rabeeh Mehdigholian Chaijani.;Fahime Edalat.;Nazila Eslami.;Hanieh Askari.;Farideh Askari.;Sara Shirvani.;Hamed Talebzadeh.;Mahdiyeh Tarahomi.;Nila MirKhani.;Faeze Karimi.;Mehdi Norouzi.;Sayed-Hamidreza Mozhgani.
来源: Clin Epigenetics. 2025年17卷1期39页
Human T-cell lymphotropic virus type 1 (HTLV-1) infection causes the uncommon and deadly cancer known as adult T-cell leukemia/lymphoma (ATLL), which affects mature T cells. Its clinical appearance is varied, and its prognosis is often miserable. Drug resistance to conventional therapies confers significant therapeutic challenges in the management of ATLL. This review discusses the emerging role of epigenetic medical advances in the treatment of ATLL, focusing on DNA methyltransferase inhibitors, histone deacetylase inhibitors, histone methyltransferase inhibitors, and BET inhibitors. Indeed, several classes of epigenetic therapies currently exhibit trailed efficacy in preclinical and clinical studies: DNA methyltransferase inhibitors like azacitidine and decitabine reexpression of silenced tumor suppressors; histone deacetylase inhibitors like vorinostat and romidepsin induce cell cycle arrest and apoptosis; bromodomain and extra-terminal inhibitors like JQ1 disrupt oncogenic signaling pathways. Whereas preclinical and early clinical data indicate modest to good efficacy for such treatments, significant challenges remain. Here, we discuss the current state of understanding of epigenetic dysregulation in ATLL and appraise the evidence supporting the use of these epi-drugs. However, despite the opened doors of epigenetic treatment, much more research is required with regard to showing the best combinations of drugs and their resistance mechanisms, the minimization of adverse effects, and how this hope will eventually be translated into benefit for the patient with ATLL.
342. EDN1 facilitates cisplatin resistance of non-small cell lung cancer cells by regulating the TNF signaling pathway.
作者: Jie Zhen.;Long Sun.;Li Ji.;Shaochong Zhou.;Yijin Cui.;Zhenwei Li.
来源: World J Surg Oncol. 2025年23卷1期71页
Cisplatin (DDP) is a commonly utilized chemotherapeutic agent. Nevertheless, the development of resistance to DDP significantly diminishes the effectiveness of DDP-based chemotherapy in patients with non-small cell lung cancer (NSCLC). In this study, we investigated the impact of endothelin 1 (EDN1) on the resistance to DDP in NSCLC.
343. Screening of common genomic biomarkers to explore common drugs for the treatment of pancreatic and kidney cancers with type-2 diabetes through bioinformatics analysis.
作者: Alvira Ajadee.;Sabkat Mahmud.;Arnob Sarkar.;Tasfia Noor.;Reaz Ahmmed.;Md Nurul Haque Mollah.
来源: Sci Rep. 2025年15卷1期7363页
Type 2 diabetes (T2D) is a crucial risk factor for both pancreatic cancer (PC) and kidney cancer (KC). However, effective common drugs for treating PC and/or KC patients who are also suffering from T2D are currently lacking, despite the probability of their co-occurrence. Taking disease-specific multiple drugs during the co-existence of multiple diseases may lead to adverse side effects or toxicity to the patients due to drug-drug interactions. This study aimed to identify T2D-, PC and KC-causing common genomic biomarkers (cGBs) highlighting their pathogenetic mechanisms to explore effective drugs as their common treatment. We analyzed transcriptomic profile datasets, applying weighted gene co-expression network analysis (WGCNA) and protein-protein interaction (PPI) network analysis approaches to identify T2D-, PC-, and KC-causing cGBs. We then disclosed common pathogenetic mechanisms through gene ontology (GO) terms, KEGG pathways, regulatory networks, and DNA methylation of these cGBs. Initially, we identified 78 common differentially expressed genes (cDEGs) that could distinguish T2D, PC, and KC samples from controls based on their transcriptomic profiles. From these, six top-ranked cDEGs (TOP2A, BIRC5, RRM2, ALB, MUC1, and E2F7) were selected as cGBs and considered targets for exploring common drug molecules for each of three diseases. Functional enrichment analyses, including GO terms, KEGG pathways, and regulatory network analyses involving transcription factors (TFs) and microRNAs, along with DNA methylation and immune infiltration studies, revealed critical common molecular mechanisms linked to PC, KC, and T2D. Finally, we identified six top-ranked drug molecules (NVP.BHG712, Irinotecan, Olaparib, Imatinib, RG-4733, and Linsitinib) as potential common treatments for PC, KC and T2D during their co-existence, supported by the literature reviews. Thus, this bioinformatics study provides valuable insights and resources for developing a genome-guided common treatment strategy for PC and/or KC patients who are also suffering from T2D.
344. Glucose and Insulin Differently Regulate Gluconeogenic and Ureagenic Gene Expression.
作者: Kanako Deguchi.;Chihiro Ushiroda.;Yuka Kamei.;Kyosuke Kondo.;Hiromi Tsuchida.;Yusuke Seino.;Daisuke Yabe.;Atsushi Suzuki.;Shizuko Nagao.;Katsumi Iizuka.
来源: J Nutr Sci Vitaminol (Tokyo). 2025年71卷1期46-54页
Glucose and insulin positively regulate glycolysis and lipogenesis through the activation of carbohydrate response element-binding protein (ChREBP) and sterol regulatory element-binding protein 1c (SREBP1c), but their respective roles in the regulation of gluconeogenic and ureagenic genes remain unclear. We compared the effects of the insulin antagonist S961 and Chrebp deletion on hepatic glycolytic, lipogenic, gluconeogenic, and ureagenic gene expression in mice. S961 markedly increased the plasma glucose, insulin, and 3-OH-butyrate concentrations and reduced the hepatic triglyceride content, but Chrebp deletion had no additive effect. We subsequently estimated the expression of genes involved in the pathways of glycolysis, gluconeogenesis, and lipogenesis. S961 potently decreased both Chrebp and Srebf1c, but Chrebp deletion weakly decreased Srebf1c mRNA expression. Both the S961 and Chrebp deletion caused decreases in glycolytic (Gck and Pklr) and lipogenic (Fasn, Scd1, Me1, Spot14, Elovl6) gene expression. S961 increased the expression of many gluconeogenic genes (G6pc, Fbp1, Aldob, Slc37a4, Pck), whereas Chrebp deletion reduced the expression of gluconeogenic genes other than Pck1. Finally, we checked the metabolites and gene expression in the ureagenesis pathway. S961 increased ureagenic gene (Arg1, Asl, Ass1, Cps1, Otc) expression, which was consistent with the metabolite data: there were reductions in the concentrations of glutamate and aspartate and increases in those of citrulline, ornithine, urea, and proline. However, Chrebp deletion had no additive effect on ureagenesis. In conclusion, insulin rather than glucose regulate ureagenic gene expression, whereas glucose and insulin regulate gluconegenic gene expression in opposite directions.
345. Effect of (p)ppGpp on the Expression of the Vibrioferrin-Mediated Iron Acquisition System in Vibrio parahaemolyticus.
作者: Tomotaka Tanabe.;Katsushiro Miyamoto.;Kenjiro Nagaoka.;Hiroshi Tsujibo.;Tatsuya Funahashi.
来源: Biol Pharm Bull. 2025年48卷2期188-194页
Bacteria have a stringent response system mediated by guanosine pentaphosphate and tetraphosphate ((p)ppGpp), which suppresses the expression of genes involved in cell growth and promotes the expression of genes involved in nutrient uptake and metabolism under nutrient-limited stress. In environments with limited availability of iron, an essential trace element, bacteria generally produce and secrete siderophores to efficiently utilize water-insoluble ferric iron (Fe3+) in the environment. In Vibrio parahaemolyticus, Fur (iron-responsive repressor) and RyhB (Fur-regulated small RNA) regulate the expression of genes involved in the utilization of vibrioferrin (VF), a siderophore produced by this bacterium. In this study, we examined whether (p)ppGpp is also involved in regulating the expression of genes related to the VF utilization system. Results of the chrome azurol S plate assay revealed that the strain in which 3 (p)ppGpp synthetases were deleted (∆relA∆spoT∆relV) produced less VF than the parental strain. Growth test results showed that the growth rate of ∆relA∆spoT∆relV in an iron-limited medium was suppressed compared with that of the parental strain but was restored with the addition of VF. Furthermore, RT-quantitative (q)PCR results showed that the expression levels of pvsA (VF biosynthesis gene) and pvuA2 (ferric VF receptor gene) in ∆relA∆spoT∆relV under iron limitation were significantly reduced compared with those in the parental strain. Western blot results demonstrated that the expression level of PvuA2 in ∆relA∆spoT∆relV was lower than that in the parental strain. These results suggest that (p)ppGpp promotes the expression of genes related to VF biosynthesis and the ferric VF uptake system under iron limitation.
346. TLR4 downregulation protects against cisplatin-induced ototoxicity in adult and pediatric patients with cancer.
作者: John J W Lee.;Asna Latif.;Erika N Scott.;Abhinav Thakral.;Mary B Mahler.;Beth Brooks.;Katrina Hueniken.;Astrid Billfalk-Kelly.;Osvaldo Espin-Garcia.;Luna Jia Zhan.;S Rod Rassekh.;Lucie Pecheux.;Maria Spavor.;Yuling Li.;David Goldstein.;Andrew Hope.;Colin J Ross.;Geoffrey Liu.;Bruce C Carleton.;Amit P Bhavsar.
来源: J Pharmacol Exp Ther. 2025年392卷2期100057页
Cisplatin causes permanent hearing loss or cisplatin-induced ototoxicity in over 50% of treated patients with cancer, leading to significant social and functional limitations. Interindividual variability in developing hearing loss suggests the role of genetic predispositions to cisplatin-induced hearing loss. We investigated genetic associations between cisplatin-induced ototoxicity and toll-like receptor 4 (TLR4), an immune receptor known to mediate inflammatory responses to cisplatin. Using a case-control candidate gene approach, we identified 20 single nucleotide polymorphisms at the TLR4 locus with significant protection against ototoxicity in a cohort of 213 adult patients, followed by an independent pediatric patient cohort (n = 357). Combined cohort analysis demonstrated a significant association between cisplatin-induced ototoxicity protection and a single variant in the TLR4 promoter, rs10759932. We showed that rs10759932 downregulated TLR4 expression that is normally induced by cisplatin. This work provides pharmacogenetic and functional evidence to implicate TLR4 with cisplatin-induced hearing loss in patients. SIGNIFICANCE STATEMENT: Adult and pediatric patients carrying toll-like receptor 4 (TLR4) genetic variants were protected against developing cisplatin-induced hearing loss following cisplatin treatment. Important variants in the TLR4 promoter disrupted a drug-gene interaction between cisplatin and TLR4, mirroring the protective effect conferred by genetic inhibition of TLR4. These variants have the potential to improve the prediction of cisplatin toxicity, allowing for more precise chemotherapy treatment.
347. High-throughput screening identifies a novel small-molecule modulator of Hsp70 that selectively enhances ubiquitination and degradation of misfolded neuronal NO synthase.
作者: Anthony M Garcia.;Amanda K Davis.;Cristian Martinez-Ramos.;Yoshihiro Morishima.;Miranda Lau.;Emily Xu.;Arya Sunil.;Haoming Zhang.;Andrew Alt.;Andrew P Lieberman.;Yoichi Osawa.
来源: Mol Pharmacol. 2025年107卷2期100008页
The Hsp90 and Hsp70 chaperones act as a protein quality control system for several hundred client proteins, including many implicated in neurodegenerative disorders. Hsp90 and Hsp70 are widely thought to be important drug targets. Although many structurally distinct compounds have been developed to target Hsp90, relatively few are known to target Hsp70 and even fewer have been tested in protein quality control systems. To address this, we describe a high-throughput thermal shift-based screen to find compounds that bind and stabilize Hsp70 and then employ assays with misfolded forms of a well-established client protein, neuronal NO synthase (nNOS), to identify compounds that enhance ubiquitination of client proteins. The ubiquitination assay employed a quantitative ELISA method to measure Hsp70:CHIP-dependent ubiquitination of heme-deficient nNOS, which is a model of a misfolded client, in reaction mixtures containing purified E1, E2, Hsp70, CHIP, and ubiquitin. We screened 44,447 molecules from the Maybridge and ChemDiv libraries and found one compound, protein folding disease compound 15 (PFD-15), that enhanced in vitro nNOS ubiquitination with an EC50 of approximately 8 μM. PFD-15 was tested in human embryonic kidney 293 cells stably transfected with a C331A nNOS, a mutation that makes nNOS a preferred client protein for ubiquitination. In this model, PFD-15 decreased steady-state levels of C331A nNOS, but not the wild-type nNOS, in a time- and concentration-dependent manner by a process attenuated by lactacystin, an inhibitor to the proteasome. PFD-15 appears to enhance binding of Hsp70 and CHIP to client proteins without interference of protein quality control mechanisms, enabling the selective clearance of misfolded proteins. SIGNIFICANCE STATEMENT: There are few treatment options for neurodegenerative diseases, which are widely thought to be caused by formation of toxic misfolded proteins. One novel approach is to enhance the Hsp90/Hsp70 protein quality control machinery to remove these misfolded proteins. Targeting Hsp70 may have advantages over targeting Hsp90, but fewer compounds targeting Hsp70 have been developed relative to those for Hsp90. The current study provides a novel approach to enhance the number of compounds targeting the Hsp70's role in protein quality control.
348. Dual nuclear receptor 4A1 (NR4A1/NR4A2) ligands inhibit glioblastoma growth and target TWIST1.
作者: Srijana Upadhyay.;Miok Lee.;Lei Zhang.;Arafat Rahman Oany.;Svetlana A Mikheeva.;Andrei M Mikheev.;Robert C Rostomily.;Stephen Safe.
来源: Mol Pharmacol. 2025年107卷2期100009页
1,1-Bis(3'-indolyl)-1-(3,5-disubstitutedphenyl)methane (DIM-3,5) compounds are dual receptor ligands that bind both orphan nuclear receptor 4A1 (NR4A1) and NR4A2. Knockdown of NR4A1 or NR4A2 by RNA interference in glioblastoma (GBM) cells decreased growth and induced apoptosis and comparable effects were observed for DIM-3,5 analogs, which exhibit inverse agonist activity and inhibit NR4A1- and NR4A2-mediated pro-oncogenic activity. Knockdown of NR4A1 or NR4A2 or treatment with DIM-3,5 analogs also decreased expression of TWIST1 mRNA and protein in GBM cells by 40%-90%.The proximal region of the TWIST1 gene promoter contains functional GC-rich binding sites that bind Sp1 and Sp4, and knockdown of these transcription factors also decreased TWIST1 expression in GBM cells. Further analysis by chromatin immunoprecipitation, protein-protein coimmunoprecipitation, and binding assays demonstrated that NR4A1/NR4A2 coregulate TWIST1 gene expression as ligand-dependent cofactors of Sp1 and Sp4, which interact with cis proximal GC-rich sites in the TWIST1 gene promoter. In vivo studies show that DIM-3,5 dual NR4A1/2 inverse agonists also reduced intratumoral TWIST1 expression while significantly prolonging survival of mice in a syngeneic mouse model of GBM, demonstrating that these ligands are promising new agents for targeting TWIST1 and treating GBM. SIGNIFICANCE STATEMENT: The TWIST1 gene is a pro-oncogenic factor that regulates epithelial-to-mesenchymal transition in glioblastoma cells. This paper shows that the orphan nuclear receptor 4A1 (NR4A1) and NR4A2 regulate TWIST1 expression, which can be targeted by bis-indole-derived dual NR4A1/2 inverse agonists.
349. Centromere protein U mediates the ubiquitination and degradation of RPS3 to facilitate temozolomide resistance in glioblastoma.
作者: Jinmin Sun.;Wenyu Zhao.;Lei Zhang.;Sicheng Wu.;Senrui Xue.;Haowei Cao.;Biao Xu.;Xinmiao Li.;Nan Hu.;Tao Jiang.;Yixin Xu.;Zhifei Wang.;Chao Zhang.;Jing Ren.
来源: Drug Resist Updat. 2025年80卷101214页
Temozolomide (TMZ) is the first-line chemotherapeutic agent for glioblastoma (GBM) therapy; however, resistance to TMZ remains a major obstacle in GBM treatment. The aim of this study is to elucidate the mechanisms underlying TMZ resistance and explore how to enhance the sensitivity of GBM to TMZ.
350. Cancer-associated fibroblasts promote doxorubicin resistance in triple-negative breast cancer through enhancing ZFP64 histone lactylation to regulate ferroptosis.
Cancer-associated fibroblasts (CAFs) have been identified to drive chemotherapy resistance in triple-negative breast cancer (TNBC). This study evaluated the functions of CAFs-mediated suppressive ferroptosis in doxorubicin (DOX) resistance in TNBC and its detailed molecular mechanisms.
351. Esketamine induces embryonic and cardiac malformation through regulating the nkx2.5 and gata4 in zebrafish.
作者: Shuang Li.;Xiang Li.;Rui Zhao.;Tingyu Jiang.;Qiuyun Ou.;Huansen Huang.;Jiancheng Tang.
来源: Sci Rep. 2025年15卷1期7187页
Esketamine (EK) has been widely used in the treatment of depression, but the effects of EK prenatal treatment on embryonic heart development have been rarely reported. This study assesses the effects of varying concentrations of EK on embryonic development and cardiogenesis to determine the teratogenic concentration in the zebrafish model, centering on the interaction between the genes nkx2.5 and gata4 to elucidate the mechanisms underlying cardiac morphogenesis. Zebrafish embryos were classified into six distinct groups and exposed to either a vehicle or EK to ascertain the median lethal concentration (LC50) at 48 and 72 h post-fertilization (hpf) analyzing mortality rate data. Embryonic and cardiac morphologies were assessed utilizing live embryo imaging techniques and stereo microscopy. Nkx2.5 and gata4 were identified via whole-mount in situ hybridization (WISH) and reverse transcription quantitative polymerase chain reaction (RT-qPCR). Exposure to EK leads to significant teratogenic effects on zebrafish embryos, which are both concentration- and time-dependent. The 48 h- and 72 h-LC50 of EK for zebrafish embryos were 1.30 (95% CI 0.92, 1.60) millimolar (mM) and 0.71 (95% CI 0.46, 1.01) mM, respectively. A significant reduction in heart rates and body length were observed and the distance between the sinus venosus and bulbar artery (SV-BA) was found expanded, the pericardial edema area showed significant swelling, and the body axis curvature was more pronounced in the EK exposure groups. Both WISH an RT-qPCR analysis showed nkx2.5 staining intensity and expression significantly decreased, while gata4 assay results were in the opposite direction. Our findings indicate that exposure of zebrafish embryos to EK results in embryonic and cardiac malformations, primarily due to the down-regulation of nkx2.5 and the over-expression of gata4. Equilibrium maintenance and compensatory mechanisms are crucial in spatiotemporal gene regulation.
352. Epigenetic activation of PTEN by valproic acid inhibits PI3K/AKT signaling and Burkitt lymphoma cell growth.
作者: Chuntuan Li.;Shengquan Liu.;Jingjing Gao.;Yahong Xu.;Qunyi Peng.;Dan Weng.;Dan Wang.;Wanlin Yang.;Ping Yi.;Zuopeng Lin.;Jinting Chen.
来源: Gene. 2025年950卷149369页
Histone deacetylase (HDAC) inhibitors show promise in treating Burkitt lymphoma (BL), although the precise mechanisms remain unclear. We investigated the effects of valproic acid (VPA), a specific HDAC inhibitor, on BL cell lines RAJI and CA46, focusing on the PTEN/PI3K/AKT pathway. Cell viability, cell cycle progression, and apoptosis were evaluated using the Cell Counting Kit-8 assay and the Annexin V-fluorescein isothiocyanate assay. Chromatin immunoprecipitation sequencing (ChIP-seq) assessed acetylation at the PTEN promoter, while gene expression and protein levels were measured via reverse transcription quantitative polymerase chain reaction and Western blotting, respectively. VPA treatment significantly reduced BL cell viability and induced apoptosis and cell cycle arrest in a dose-dependent manner. Compared to peripheral blood mononuclear cells, BL cells exhibited significantly higher HDAC mRNA and protein levels. ChIP-seq analysis revealed increased acetylation of the PTEN promoter following exposure to VPA. After treatment with 4 mM VPA, PTEN protein levels in BL cells increased significantly, while levels of HDAC, p-AKT, and p-p70S6K proteins decreased markedly. Furthermore, compared to VPA treatment alone, the combination of VPA and the PI3K inhibitor BEZ235 led to even greater PTEN protein expression, further decreased p-AKT and p-p70S6K protein levels, and further reduced cell viability in BL cells. VPA exerts its antitumor effects in BL cells by modulating the PTEN/PI3K/AKT pathway through the inhibition of HDAC1.
353. 5-hydroxymethylfurfural attenuates osteoarthritis by upregulating of glucose metabolism in chondrocytes.
作者: Xinyu Wang.;Xiaolong Han.;Jinjin Ma.;Ruogu Zhang.;Kaiao Zou.;Xucheng Wang.;Wenhua Yuan.;Min Qiu.;Jiali Chen.;Yimin Yang.;Songfeng Hu.;Xiaofeng Wang.;Hongting Jin.;Yuanbin Zhang.;Pinger Wang.
来源: Phytomedicine. 2025年139卷156499页
5-HMF (5-hydroxymethylfurfural), an active constituent found in Radix Rehmanniae Preparata, a widely utilized traditional Chinese medicine for osteoarthritis (OA) treatment, exhibits notable therapeutic benefits in countering the catabolic and inflammatory responses of OA chondrocytes. Despite these promising effects, the underlying mechanisms of 5-HMF's action remain elusive, thereby impeding its broader clinical application and development.
354. MSB2-activated pheromone pathway regulates fungal plasma membrane integrity in response to herbicide adjuvant.
作者: Jianwei Pu.;Xiuju Long.;Yifan Li.;Jian Zhang.;Fei Qi.;Jiangtao Gao.;Qirong Shen.;Zhenzhong Yu.
来源: Sci Adv. 2025年11卷9期eadt8715页
Glyphosate-based herbicides (GBHs) are used worldwide for weed management. However, GBHs pose a threat to soil fungal community, although fungi can degrade and use glyphosate as a nutrient source. How fungi respond to GBHs remains enigmatic. Here, we found that, not as in plants, the commercial GBH Roundup does not target the 5-enolpyruvyl-shikimate-3-phosphate synthase in the soil-derived fungus Trichoderma guizhouense, whereas it impairs fungal growth. We demonstrate that the herbicide adjuvant Triton CG-110 is more toxic to fungal cells than pure glyphosate. It limits nitrogen uptake, which induces the expression of proteinase YPS1 to catalyze the shedding of the MSB2 extracellular domain from the plasma membrane, leading to the activation of the MAPK TMK1 pheromone pathway. The downstream B2H2-type transcription factor STE12 directly regulates ergosterol biosynthesis, affecting membrane fluidity and stability. To our knowledge, this is the first evidence that the pheromone pathway is implicated in ergosterol biosynthesis and plasma membrane integrity.
355. Tolerance and antioxidant response to heavy metals are differentially activated in Trichoderma asperellum and Trichoderma longibrachiatum.
作者: Diego Helman Zapata-Sarmiento.;Aida Araceli Rodríguez-Hernández.;Gabriela Sepúlveda-Jiménez.;Mario Rodríguez-Monroy.
来源: PeerJ. 2025年13卷e19016页
Heavy metal pollution reduces the community of soil microorganisms, including fungi from the genus Trichoderma, which are plant growth promotors and biological control agents. Because of potential effects on crop productivity, the toxic effects of heavy metals (HMs) in Trichoderma are of interest. However, there have been few studies on the biochemical and molecular response to oxidation caused by exposure to copper (Cu), chromium (Cr), and lead (Pb) and whether this antioxidant response is species-specific. In this study, we compared the tolerance of Trichoderma asperellum and Trichoderma longibrachiatum to Cu, Pb, and Cr and evaluated the expression of genes related to the antioxidant response, including glutathione peroxidase (GPX), catalase (CAT), and cysteine synthase (CYS) as well as the activity of peroxidase and catalase. The isolates of Trichoderma were selected because we previously reported them as promotors of plant growth and agents of biological control. Our results revealed that, with exposure to the three HMs, the Trichoderma cultures formed aggregates and the culture color changed according to the metal and the Trichoderma species. The tolerance index (TI) indicated that the two Trichoderma species were tolerant of HMs (Cu > Cr > Pb). However, the TI and conidia production revealed that T. longibrachiatum was more tolerant of HMs than T. asperellum. The three HMs caused oxidative damage in both Trichoderma species, but the enzyme activity and gene expression were differentially regulated based on exposure time (72 and 144 h) to the HMs and Trichoderma species. The main changes occurred in T. asperellum; the maximum expression of the GPX gene occurred at 144 h in response to all three HMs, whereas the CAT gene was upregulated at 72 h in response to Cu but downregulated at 144 h in response to all three HMs. The CYS gene was upregulated in response to the three metals. The peroxidase activity increased with all three HMs, but the catalase activity increased with Cu and Pb at 72 h and decreased at 144 h with Pb and Cr. In T. longibrachiatum, the GPX gene was upregulated with all three HMs at 72 h, the CAT gene was upregulated only with Pb at 72 h and was downregulated at 144 h with HMs. Cr and Cu upregulated CYS gene expression, but expression did not change with Pb. The peroxidase activity increased with Cu at 144 h and with Cr at 72 h, whereas Pb decreased the enzyme activity. In contrast, catalase activity increased with the three metals at 144 h. In conclusion, T. longibrachiatum was more tolerant of Cu, Cr, and Pb than was T. asperellum, but exposure to all three HMs caused oxidative damage to both Trichoderma species. Peroxidases and catalases were activated, and the expression of the genes GPX and CYS was upregulated, whereas the CAT gene was downregulated. These findings indicate that the antioxidant response to HMs was genetically modulated in each Trichoderma species.
356. Extinction of contextual fear memory is facilitated in TRPM2 knockout mice.
Transient receptor potential melastatin type 2 (TRPM2) is a nonselective cation channel involved in synaptic plasticity. We investigated its role in contextual fear conditioning and extinction of conditioned fear using Trpm2-deficient (Trpm2-/-) mice. Trpm2-/- mice exhibited reduced acquisition of contextual fear memory during conditioning but had an intact freezing response to conditioning context 24 h after conditioning. They also showed a reduced freezing response to extinction training, indicating facilitated extinction. Consistent with this, infusion of flufenamic acid (FFA), a TRPM2 antagonist, into the dentate gyrus (DG) of the hippocampus in fear-conditioned mice facilitated extinction of contextual fear. The enhanced extinction in Trpm2-/- and FFA-treated mice was associated with down-regulation of immediate-early genes (IEGs) including Npas4, c-Fos, Arc and Egr1 in the hippocampus after extinction training. Our results indicate that TRPM2 plays a positive role in retention of contextual fear memory by modulating neuronal activity in the hippocampus, and suggest that TRPM2 activity could potentially be targeted to strengthen extinction-based exposure therapies for post-traumatic stress disorder (PTSD).
357. Candida albicans cell-free extract against human gastric cancer; an in-vitro study.
作者: Babak Pakbin.;Shaghayegh Pishkhan Dibazar.;Samaneh Allahyari.;Faezeh Mohammadi.;Reza Ovissipour.;Amir Peymani.;Arian Amirvaresi.
来源: BMC Res Notes. 2025年18卷1期87页
Yeast cell-free extracts and supernatants contain several compounds such as β-glucan, mannan, chitin, and mannoprotein with potent antitumor and other health-promoting activities. Candida albicans have been frequently and widely isolated from different habitats compared to other yeasts. The supernatant extracted from this yeast also contains β-glucan, chitin, and mannan compounds. This study investigates the anticancer, apoptosis-inducing, and downregulation of proinflammatory gene expression activities in normal and drug-resistant human stomach cancer cells (EPG and RDB cell lines) after 24 and 48 h treatment.
358. Machine learning analysis of gene expression profiles of pyroptosis-related differentially expressed genes in ischemic stroke revealed potential targets for drug repurposing.
作者: Changchun Hei.;Xiaowen Li.;Ruochen Wang.;Jiahui Peng.;Ping Liu.;Xialan Dong.;P Andy Li.;Weifan Zheng.;Jianguo Niu.;Xiao Yang.
来源: Sci Rep. 2025年15卷1期7035页
The relationship between ischemic stroke (IS) and pyroptosis centers on the inflammatory response elicited by cerebral tissue damage during an ischemic stroke event. However, an in-depth mechanistic understanding of their connection remains limited. This study aims to comprehensively analyze the gene expression patterns of pyroptosis-related differentially expressed genes (PRDEGs) by employing integrated IS datasets and machine learning techniques. The primary objective was to develop classification models to identify crucial PRDEGs integral to the ischemic stroke process. Leveraging three distinct machine learning algorithms (LASSO, Random Forest, and Support Vector Machine), models were developed to differentiate between the Control and the IS patient samples. Through this approach, a core set of 10 PRDEGs consistently emerged as significant across all three machine learning models. Subsequent analysis of these genes yielded significant insights into their functional relevance and potential therapeutic approaches. In conclusion, this investigation underscores the pivotal role of pyroptosis pathways in ischemic stroke and identifies pertinent targets for therapeutic development and drug repurposing.
359. Menin inhibitor MI-503 exhibits potent anti-cancer activity in osteosarcoma.
作者: Shen Tian.;Zhuang-Yu Hao.;Deng-Hui Xu.;Xuan-Zong Wang.;Cheng-Cheng Shi.;Yi Zhang.
来源: Sci Rep. 2025年15卷1期7059页
Small molecule Menin inhibitor recently has emerged as a new therapeutic by targeting the interaction of histone methyltransferase MLL1 (KMT2A) with Menin. MLL1 is associated with aggressive osteosarcoma (OS) in young adults. The purpose of the study is to explore whether Menin inhibitors have therapeutic effects in OS.To investigate the anti-OS activity of the Menin inhibitor MI-503 in vitro, we performed CCK-8 cell growth and colony formation assay. Cellular thermal shift assay was used to test whether MI-503 binds to Menin in osteosarcoma cells. The expression of oncogenes in MI-503 treated cells were detected by western blotting and Quantitative reverse transcription polymerase chain reaction (RT-qPCR) assay. Finally, we established the OS subcutaneous xenograft mice model to study the anti-OS effect of MI-503 in vivo.The results showed that MI-503 dose-dependently suppressed cell proliferation in 6 OS cell lines, including 143B, HOS, Saos-2, SKES1, MG-63, and U2OS. 143B is the most sensitive cell line with EC50 value 0.13 µM. Cellular thermal shift assay showed that MI-503 binds cellular Menin. RT-qPCR assay showed that MI-503 suppressed the expression of Mcl-1 and c-Myc in 143B cells. Western blotting result showed that MI-503 markedly suppressed the H3K4 methylation, significantly suppressed the expression of Mcl-1 and c-Myc, and increased the expression of p27 and cl-PARP in 143B and Saos-2 cells. In a study with 143B cell-derived xenograft model, we found that MI-503 profoundly inhibited OS tumor growth in mice. Immunohistochemistry (IHC) study showed that MI-503 suppressed the H3K4 methylation and inhibited the expression of the cell proliferation biomarker Ki67 in 143B OS xenograft tissue.Overall, our findings demonstrated the potent anti-OS activity of MI-503 in both in vitro and in vivo models, which also indicated that Menin inhibitor may be a prospective therapeutic strategy for human OS.
360. Aspirin-responsive gene switch regulating therapeutic protein expression.
作者: Jinbo Huang.;Ana Palma Teixeira.;Ting Gao.;Shuai Xue.;Mingqi Xie.;Martin Fussenegger.
来源: Nat Commun. 2025年16卷1期2028页
Current small-molecule-regulated synthetic gene switches face clinical limitations such as cytotoxicity, long-term side-effects and metabolic disturbances. Here, we describe an advanced synthetic platform inducible by risk-free input medication (ASPIRIN), which is activated by acetylsalicylic acid (ASA/aspirin), a multifunctional drug with pain-relieving, anti-inflammatory, and cardiovascular benefits. To construct ASPIRIN, we repurpose plant salicylic acid receptors NPR1 and NPR4. Through domain truncations and high-throughput mutant library screening, we enhance their ASA sensitivity. Optimized NPR1 fused with a membrane-tethering myristoylation signal (Myr-NPR1) forms a complex with NPR4, which is fused with a DNA binding domain (VanR) and a transactivation domain (VP16). ASA induces dissociation of the Myr-NPR1/NPR4-VanR-VP16 complex, allowing nuclear translocation of NPR4-VanR-VP16 to activate VanR-operator-controlled gene expression. In male diabetic mice implanted with microencapsulated ASPIRIN-engineered cells, ASA regulates insulin expression, restores normoglycemia, alleviates pain and reduces biomarkers of diabetic neuropathy and inflammation. We envision this system will pave the way for aspirin-based combination gene therapies.
|