Cellular signalling最新文献

{"title":"SGK1 mediates herpes simplex keratitis via the PI3K/SGK1/ Wnt signaling pathways","authors":"Wei Ye ,&nbsp;Songyi Tang ,&nbsp;Yue Wang ,&nbsp;Wenzhe Wang ,&nbsp;Yumeilan Liu ,&nbsp;Huanhuan Xu ,&nbsp;Hu Meng ,&nbsp;Yan Lu ,&nbsp;Zhenping Huang ,&nbsp;Yirui Ge","doi":"10.1016/j.cellsig.2024.111566","DOIUrl":"10.1016/j.cellsig.2024.111566","url":null,"abstract":"<div><div>Herpes simplex virus type 1 (HSV-1) is a common virus infecting the ocular tissue. It infects eye tissues, such as the eyelid, cornea, and conjunctiva. Corneal HSV-1 infection causes herpes simplex keratitis (HSK), which can induce vision loss. Current treatments for eye infections targeting HSV-1 can led to various sequelae. Antiviral drugs only work during active viral replication, and viral resistance has been recorded in numerous cases. Therefore, it is necessary to determine the molecular mechanisms underlying HSV-1 infection and identify new antiviral drugs. There are no reports on whether PI3K can regulate SGK1 to modulate HSV-1 infection in corneal epithelial cells (CECs), or how this mechanism works.</div><div>This study found that HSV-1 levels and apoptosis increased in human corneal epithelial cells (HCECs) and BALB/c mice after HSV-1 infection. Serum and glucocorticoid-regulated protein kinase 1 (SGK1) were upregulated in HCECs and corneal tissues of BALB/c mice infected with HSV-1, as evidenced by whole-transcriptome sequencing, quantitative real-time polymerase chain reaction (RT-qPCR), and immunofluorescence staining experiments. An inhibitor of SGK1 (GSK 650394) reduced SGK1 expression, HSV-1 replication, and apoptosis in CECs, as evidenced by western blotting, flow cytometry, and in cell western blotting. The phosphatidylinositol 3′-kinase (PI3K) pathway was activated in CECs infected with HSV-1. After treatment with the PI3K inhibitor (LY294002), the expression of SGK1 and Wnt signaling pathway protein β-catenin were downregulated, and the replication of HSV-1 decreased in CECs; additionally, CECs apoptosis was reduced.</div><div>HSV-1 replication causes CECs apoptosis. In HSV-1 infected CECs, SGK1 expression was upregulated by activated PI3K/SGK1 signaling pathway. Additionally, SGK1 activated Wnt/β-catenin signaling pathway to promote HSV-1 replication and cause CEC apoptosis. In conclusion, SGK1 is an important target for HSK treatment.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111566"},"PeriodicalIF":4.4,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"METTL3-mediated m6A modification of EGR1 mRNA promotes T2DM vasculopathy","authors":"Meng Tao ,&nbsp;Li Shan ,&nbsp;Wei Zhang ,&nbsp;LiangBing Wei ,&nbsp;MingFei Guo ,&nbsp;ZhaoHui Fang ,&nbsp;JinDong Zhao ,&nbsp;JiaRong Gao","doi":"10.1016/j.cellsig.2024.111564","DOIUrl":"10.1016/j.cellsig.2024.111564","url":null,"abstract":"<div><div>Vascular endothelial dysfunction is one of the leading causes of developing vascular lesions in Type 2 diabetes mellitus (T2DM). In the development of vascular lesions, when endothelial cells are stimulated by hyperglycemia, inflammation and other external conditions, endothelial cell dysfunction will occur, which promotes endothelial cells to lose its typical phenotype and gain mesenchymal characteristics, with the occurrence of endothelial-to-mesenchymal transition (EndMT). At the same time promote endothelial cell proliferation and migration, induce vascular injury. m6A methylation modification enzyme METTL3 is involved in the development of vascular lesions in T2DM. However, the mechanisms by which METTL3 is involved in T2DM vascular lesions are unclear. In this study, we induced T2DM vascular lesions in human umbilical vein endothelial cells (HUVECs) mimicking high glucose and TNF-α (H + T) levels.</div><div>The effects of METTL3 on HUVECs EndMT, proliferation and migration have been revealed. Protein expression of endothelial calmodulin (VE-Cadherin) and smooth muscle actin (α-SMA) was visualised by western blot and immunofluorescence techniques to evaluate the occurrence of EndMT. In addition, MeRIP-seq revealed a METTL3-mediated m6A modification profile. MeRIP-qPCR combined with m6A site prediction verified the methylation levels of downstream targets and identified EGR1 as a target of METTL3. Activation of EGR1 successfully rescued EndMT in METTL3-deficient HUVECs. In summary, targeting METTL3 may become an important molecular target for intervention in diabetic vascular lesions.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111564"},"PeriodicalIF":4.4,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CTSG restraines the proliferation and metastasis of head and neck squamous cell carcinoma by blocking the JAK2/STAT3 pathway","authors":"Hongting Hua ,&nbsp;Xiaonan Yang ,&nbsp;Dongdong Meng ,&nbsp;Ruijia Gan ,&nbsp;Nuo Chen ,&nbsp;Lanqiaofeng He ,&nbsp;Dong Wang ,&nbsp;Wanjin Jiang ,&nbsp;Dongyu Si ,&nbsp;Xu Wang ,&nbsp;Xiaomin Zhang ,&nbsp;Xiang Wei ,&nbsp;Yiming Wang ,&nbsp;Bao Li ,&nbsp;Huabing Zhang ,&nbsp;Chaobing Gao","doi":"10.1016/j.cellsig.2024.111562","DOIUrl":"10.1016/j.cellsig.2024.111562","url":null,"abstract":"<div><h3>Background</h3><div>Head and neck squamous cell carcinoma (HNSC) is recognized as the sixth most prevalent cancer globally, with around 900,000 new cases diagnosed each year. The management of HNSC poses significant challenges due to its rising incidence and suboptimal treatment outcomes in many patients. Thus, understanding the underlying molecular mechanisms that drive the onset and advancement of HNSC is crucial in order to steer the creation of novel treatment strategies. Previous researches have suggested that Cathepsin G (CTSG), a serine protease, may play a role in tumorigenesis, but its exact function in HNSC is still unknown.</div></div><div><h3>Methods</h3><div>The TCGA and GTEx datasets were utilized to examine the expression and potential role of CTSG in pancancer. CTSG expression in HNSC tissues and normal tissues was analyzed using qRT-PCR, Western blot and immunohistochemistry techniques. The effects of altering CTSG expression on proliferation, migration, and apoptosis of HNSC cells were evaluated using various tests such as MTT assays, colony formation assays, wound-healing assays, transwell assays, flow cytometry, and xenograft tumor growth models. The functionality of CTSG on the JAK2/STAT3 pathway was validated using activators and inhibitors of this pathway after comfirming that CTSG could regulate this pathway.</div></div><div><h3>Results</h3><div>In our study, we indicated that CTSG expression in HNSC tumor tissues was significantly lower than in adjacent normal tissues and CTSG gene level was positively correlated with patient prognosis. Additionally, we observed a decrease in tumor proliferation and migration, as well as an increase in apoptosis, following CTSG overexpression. Conversely, opposite effects were noted upon CTSG knockdown. Mechanistically, CTSG overexpression inhibited JAK2/STAT3 signaling, while CTSG knockdown activated it. This was confirmed by using IL-6 and JAK2 inhibitor.</div></div><div><h3>Conclusion</h3><div>CTSG impedes the proliferation and metastasis of HNSC <em>in vivo</em> and <em>in vitro</em>. CTSG is potential to act as a cancer suppressor in HNSC by focusing on the JAK2/STAT3 signaling pathway, indicating its possible use as a diagnostic marker and treatment target for HNSC.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111562"},"PeriodicalIF":4.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Circ-SPATA13 regulates the osteogenic differentiation of human periodontal ligament stem cells through the miR-485-5p_R + 1/BMP7 axis","authors":"Tong Xiao ,&nbsp;Yijia Shi ,&nbsp;Yu Ye ,&nbsp;Jing Wang ,&nbsp;Wenmin Wang ,&nbsp;Haowen Yu ,&nbsp;Maoshen Yan ,&nbsp;Jinhua Yu","doi":"10.1016/j.cellsig.2024.111561","DOIUrl":"10.1016/j.cellsig.2024.111561","url":null,"abstract":"<div><h3>Background</h3><div>Human periodontal ligament stem cells (PDLSCs) are widely available and have strong osteogenic differentiation ability, which makes them promising tools for bone regeneration. Circular RNAs (circRNAs) play a variety of functions in the process of cell differentiation and are potential therapeutic targets. Here, we identified a new circRNA, circ-SPATA13, and found that it was highly positively correlated with the osteogenic differentiation of PDLSCs. Therefore, in this study, we revealed the significance and mechanism of circ-SPATA13 in the osteogenic differentiation of PDLSCs.</div></div><div><h3>Methods</h3><div>PDLSCs were isolated from third molars with incomplete apical development and induced to undergo chondrogenic, adipogenic, or osteogenic differentiation. Surface markers were detected <em>via</em> flow cytometry. Proliferation was assessed with EdU and CCK-8 assays. The circ-SPATA13 and miR-485-5p_R + 1-mediated control of mineral deposition was evaluated through alizarin red and alkaline phosphatase staining. Osteogenesis-related factor expression was detected through western blotting, immunofluorescence, and qRT-PCR. Fluorescence <em>in situ</em> hybridization was used to examine circ-SPATA13 localization within PDLSCs. The relationships among circ-SPATA13, miR-485-5p_R + 1, and BMP7 during PDLSCs osteogenesis were assessed through western blotting, qRT-PCR, dual-luciferase assay, rescue experiment, and bioinformatics approaches.</div></div><div><h3>Results</h3><div>Primary PDLSCs expressing mesenchymal stem cell surface markers were isolated. Circ-SPATA13 was identified and found to have no impact on PDLSC proliferation, whereas it was a positive regulator of their osteogenic differentiation, a process which was antagonized by miR-485-5p_R + 1. Dual-luciferase reporter assays revealed that circ-SPATA13 was able to function as a molecular sponge to sequester miR-485-5p_R + 1 within PDLSCs, while this miRNA was able to bind to the 3’-UTR of the target mRNA BMP7. In rescue experiments, circ-SPATA13 was confirmed to regulate the osteogenic differentiation of PDLSCs <em>via</em> this miR-485-5p_R + 1/BMP7 axis. Moreover, <em>in vivo</em> experiments in rats demonstrated that the overexpression of circ-SPATA13 in PDLSCs was associated with the promotion of bone formation in a skull defect model system.</div></div><div><h3>Conclusion</h3><div>These data supported the osteogenic functions of circ-SPATA13 in PDLSCs. Mechanistically, this circRNA was found to function as a molecular sponge for miR-485-5p_R + 1, in turn targeting BMP7 to promote the osteogenic differentiation of PDLSCs. This circ-SPATA13/miR-485-5p_R + 1/BMP7 axis may be a novel target for treatments promoting PDLSCs osteogenic differentiation.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111561"},"PeriodicalIF":4.4,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142817415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proguanil inhibits proliferation and migration in glioblastoma development through targeting CSF1R receptor","authors":"Bingxi Ren ,&nbsp;Jinna Liang ,&nbsp;Yanhong Liu ,&nbsp;Yuxiu Zhang ,&nbsp;Xiaoyu Ma ,&nbsp;Panpan Lei ,&nbsp;Jiapan Gao ,&nbsp;Weina Ma","doi":"10.1016/j.cellsig.2024.111550","DOIUrl":"10.1016/j.cellsig.2024.111550","url":null,"abstract":"<div><div>Glioblastoma (GBM) is the most common and aggressive malignant tumor of the central nervous system, characterized by high morbidity and invasive potential, necessitating urgent development of novel therapeutic strategies. Studies have shown that colony stimulating factor-1 receptor (CSF1R) is abnormally expressed in a variety of solid tumors, which is closely related to the development of tumor cells. In this study, the CSF1R/cell membrane Chromatographic model was successfully constructed, and was used to screen active compounds targeting CSF1R from more than 60 compounds. Among these, Proguanil exhibited the strongest affinity with retention time of 69 min, and a <em>K</em>_D value of (6.73 ± 0.05) × 10⁻⁷ M. Proguanil effectively inhibited the growth of U87MG cells <em>in vitro</em> and <em>in vivo</em> by inducing G0/G1 phase cell cycle arrest and suppressing U87MG cells migration. More importantly, we found that Proguanil's inhibitory effect on U87MG cell growth and migration was positively correlated with CSF1R expression, and this effect diminished following CSF1R knockdown and Proguanil demonstrated synergistic effects with CSF1R-targeting positive drugs (BLZ945 and GW2580). Furthermore, Proguanil was found to inhibit CSF1R phosphorylation along with downstream signaling pathways such as PTEN/AKT/mTOR and Ras/MEK1/2/ERK1/2, thereby regulating cell cycle-related molecules (p21, CDK4, and CyclinD1) and cell migration-related molecule MMP3. Meanwhile, Proguanil targeted CSF1R to inhibit M2-type polarization of tumor-associated macrophages (TAMs) and their proliferation, thus altering the tumor microenvironment while indirectly suppressing the proliferation and migration of U87MG cells. Taken together, these findings suggest that Proguanil may serve as a promising CSF1R antagonist for GBM treatment.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111550"},"PeriodicalIF":4.4,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142812052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inhibition of ERO1L induces autophagy and apoptosis via endoplasmic reticulum stress in colorectal cancer","authors":"Peng Chen ,&nbsp;Yinhao Chen ,&nbsp;Amit Sharma ,&nbsp;A. Gonzalez-Carmona Maria ,&nbsp;Ingo G.H. Schmidt-Wolf","doi":"10.1016/j.cellsig.2024.111560","DOIUrl":"10.1016/j.cellsig.2024.111560","url":null,"abstract":"<div><div>Colorectal cancer (CRC) is one of the most common types of cancer with high incidence and mortality. Endoplasmic reticulum oxidoreductase 1 alpha (ERO1L) is overexpressed in CRC. This study aims to explore the role of ERO1L in CRC progression and evaluate the anti-tumor efficacy of the combination treatment of ERO1L inhibition with endoplasmic reticulum (ER) stress-inducing therapies. Herein, we found that ERO1L was elevated in CRC cell lines and patients. ER stress upregulated the expression of ERO1L, and ERO1L deficiency induced ER stress in CRC. ERO1L knockdown increased the susceptibility of CRC cells to ER stress. ERO1L contributed to the malignant phenotypes of CRC cells. Inhibition of ERO1L induced autophagy and caspase-dependent apoptosis by the induction of ER stress in CRC cells. Mechanically, the ERK1/2 pathway was involved in ERO1L knockdown-mediated apoptosis and autophagy. Combination treatment of ERO1L inhibition with ER stress-inducing agents, such as unfolded protein response (UPR)-targeting inhibitors and proteasome inhibitors, demonstrated enhanced anti-tumor capacity. In conclusion, ERO1L is overexpressed in CRC, and ERO1L deficiency induces apoptosis and autophagy via ER stress. ERO1L inhibition combined with ER stress-inducing therapies exhibits more effective anti-tumor activity against CRC. ERO1L may serve as a biomarker and therapeutic target for CRC treatment.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111560"},"PeriodicalIF":4.4,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142806153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Targeting p38 MAPK: A potential bridge between ER stress and age-related bone loss","authors":"Meng Yin ,&nbsp;Xin Zheng ,&nbsp;Liang Shi","doi":"10.1016/j.cellsig.2024.111549","DOIUrl":"10.1016/j.cellsig.2024.111549","url":null,"abstract":"<div><div>The endoplasmic reticulum (ER) is crucial in the development of numerous age-related bone disorders. Notably, ER stress can precipitate bone loss by orchestrating inflammatory responses, apoptosis, and autophagy through the activation of the p38 MAPK pathway. Age-related bone loss diseases pose a significant burden on society and healthcare as the global population ages. This review provides a comprehensive analysis of recent research advancements, delving into the critical role of ER stress-activated p38 MAPK in inflammation, apoptosis, and autophagy, as well as its impact on bone formation and bone resorption. This review elucidates the molecular mechanisms underlying the involvement of ER stress-activated p38 MAPK in osteoporosis, rheumatoid arthritis, periodontitis, and osteoarthritis and discusses the therapeutic potential of targeting p38 MAPK. Furthermore, this review provides a scientific foundation for new therapeutic strategies by highlighting prospective research directions.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111549"},"PeriodicalIF":4.4,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142784229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LLGL2 targets the Hedgehog signaling pathway to influence malignant progression of endometrial cancer","authors":"Hua Yang ,&nbsp;Yuqing Ji ,&nbsp;Dong Liu ,&nbsp;Ou Chai ,&nbsp;Zhiying Qi ,&nbsp;Ruimeng Guo ,&nbsp;Bei Sun ,&nbsp;Fang Wang","doi":"10.1016/j.cellsig.2024.111553","DOIUrl":"10.1016/j.cellsig.2024.111553","url":null,"abstract":"<div><h3>Background</h3><div>Endometrial cancer (EC) is a malignant tumor of the endometrial epithelium, with endometrial adenocarcinoma being the most common type. It has a good overall prognosis, but recurrence and metastasis are often associated with poorer outcomes. LLGL2 is closely linked to tumorigenesis; however, its in endometrial carcinoma is unknown. This study investigated the biological function of LLGL2 in endometrial cancer and its intrinsic molecular mechanisms in promoting the malignant progression of the disease.</div></div><div><h3>Methods</h3><div>The expression of LLGL2 in endometrial cancer was analyzed using the TCGA database via UALCAN and validated through western blot analysis, RT-qPCR, and immunohistochemistry. Additionally, the correlation between LLGL2 and the clinicopathological features of patients was examined. The effects of LLGL2 on the proliferation and migration of endometrial cancer cells were assessed using EdU proliferation assay, clone formation assay, Transwell assay, scratch assay, and the detection of proliferation and metastasis markers. Furthermore, the impact of LLGL2 on key genes of the Hedgehog signaling pathway, including SHH, PTCH1, SMO, and GLI1, was explored using western blot analysis and RT-qPCR. The expression of SHH, PTCH1 and GLI1 was also detected in cells treated with the Hedgehog signaling pathway inhibitor (JK184) in endometrial cancer cells overexpressing LLGL2. Finally, the role of LLGL2 in tumor growth was investigated in vivo using sh-LLGL2 and OE-LLGL2 nude mouse tumorigenic model.</div></div><div><h3>Results</h3><div>LLGL2 expression was upregulated in endometrial cancer tissues compared to normal endometrium. LLGL2 expression was significantly correlated with tumor histological grading (<em>p</em> &lt; 0.01). LLGL2 promoted proliferation, migration, and invasive abilities of endometrial cancer cells. In the nude mouse tumorigenic model, LLGL2 deficiency inhibited the growth of subcutaneously transplanted tumors, and overexpression of LLGL2 promoted the growth of tumors. At the molecular level, LLGL2 may promote the transduction of the Hedgehog signaling pathway in endometrial cancer cells.</div></div><div><h3>Conclusion</h3><div>LLGL2 may be involved in the development of endometrial cancer as an oncogene, leading to aberrant activation of the Hedgehog signaling pathway. Therefore, LLGL2 is a potential new target for the treatment of endometrial cancer.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111553"},"PeriodicalIF":4.4,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142794533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SSBP1 positively regulates RRM2, affecting epithelial mesenchymal transition and cell cycle arrest in human lung adenocarcinoma cells","authors":"Xingyu Yang ,&nbsp;Bingfeng Ma ,&nbsp;Yafeng Liu ,&nbsp;Jiawei Zhou ,&nbsp;Jianqiang Guo ,&nbsp;Yuanyuan Peng ,&nbsp;Ying Bai ,&nbsp;Jing Wu ,&nbsp;Dong Hu","doi":"10.1016/j.cellsig.2024.111552","DOIUrl":"10.1016/j.cellsig.2024.111552","url":null,"abstract":"<div><div>Progression of lung adenocarcinoma (LUAD) is frequently associated with alterations in epithelial-mesenchymal transition (EMT) and cell cycle. Our study analyzed the Cancer Genome Atlas (TCGA) database and identified a positive correlation between high expression of SSBP1 in LUAD tumor tissues and poor prognosis (<em>p</em> &lt; 0.05), with an AUC of 0.853, suggesting that SSBP1 could serve as a prognostic biomarker. In vitro experiments, including siRNA-mediated SSBP1 knockdown and subsequent cell cloning and Transwell assays, revealed significant inhibition of proliferation, migration, and cell cycle progression in LUAD cells (<em>p</em> &lt; 0.05). In vivo mouse model experiments further confirmed that SSBP1 knockdown inhibits tumor burden (p &lt; 0.05). Mechanistic investigations, integrating pathway enrichment analysis with molecular biology techniques, identified RRM2 as a downstream target of SSBP1, and RRM2 knockdown similarly suppressed LUAD cell proliferation, migration, and cell cycle progression (<em>p</em> &lt; 0.05). These findings indicate that SSBP1 promotes EMT and cell cycle progression in LUAD cells by positively regulating RRM2, thereby accelerating disease progression. Collectively, our study not only confirms the potential role of SSBP1 in LUAD but also provides a theoretical foundation for therapeutic strategies targeting the SSBP1/RRM2 axis, potentially offering new therapeutic targets for LUAD patients.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111552"},"PeriodicalIF":4.4,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142791214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PTPN22 and the pathogenesis of ulcerative colitis: Insights into T cell differentiation and the JAK/STAT signaling pathway","authors":"Yang Yu ,&nbsp;Xinlei Ba ,&nbsp;Tong Li ,&nbsp;Wenying Xu ,&nbsp;Jiahui Zhao ,&nbsp;Na Zhang ,&nbsp;Yanjiao Zhao ,&nbsp;Tao Wang ,&nbsp;Xiaonan Zhang ,&nbsp;Xipeng Wang ,&nbsp;Bin Bai ,&nbsp;Bing Wang","doi":"10.1016/j.cellsig.2024.111551","DOIUrl":"10.1016/j.cellsig.2024.111551","url":null,"abstract":"<div><div>70 % of the ulcerative colitis (UC) linked gene loci are associated with other autoimmune or immunodeficient diseases. The phosphatase activity of PTPN22 can regulate the development of T cells and contribute to regulate the level of inflammation in autoimmune diseases. We produced PTPN22-CS thymus-specific transgenic mice, which suppressed PTPN22 enzyme activity in the thymocytes. Overexpressed PTPN22-CS facilitated the development of the thymocytes towards CD4⁺T cells and resulted in an increased proportion of the Th1 and Treg cells in the UC mesenteric lymph nodes. PTPN22-CS promoted the activation of the JAK/STAT signaling pathway in the Th1 and Treg cells that localized in the colon, resulting in an excessive production of inflammatory mediators such as IL-2 and IFN-γ. Consequently, PTPN22-CS contributes to the inflammatory response of ulcerative colitis. In summary, the tyrosine phosphatase activity of PTPN22 plays a role in modulating UC by regulating T cell differentiation and modulating the JAK/STAT signaling pathway, thereby influencing the inflammatory response in colonic. These findings provide new insight into the association between PTPN22 and the pathogenesis of UC.</div></div>","PeriodicalId":9902,"journal":{"name":"Cellular signalling","volume":"127 ","pages":"Article 111551"},"PeriodicalIF":4.4,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142791212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}