Cell Communication and Signaling最新文献

{"title":"Adipocyte derived exosomes promote cell invasion and challenge paclitaxel efficacy in ovarian cancer","authors":"Michael Ellis Williams, David Howard, Claire Donnelly, Fereshteh Izadi, Jezabel Garcia Parra, Megan Pugh, Kadie Edwards, Kerryn Lutchman-Sigh, Sadie Jones, Lavinia Margarit, Lewis Francis, R. Steven Conlan, Francesca Taraballi, Deyarina Gonzalez","doi":"10.1186/s12964-024-01806-4","DOIUrl":"https://doi.org/10.1186/s12964-024-01806-4","url":null,"abstract":"Epithelial ovarian cancer (EOC) is the deadliest gynaecological cancer with high mortality rates driven by the common development of resistance to chemotherapy. EOC frequently invades the omentum, an adipocyte-rich organ of the peritoneum and omental adipocytes have been implicated in promoting disease progression, metastasis and chemoresistance. The signalling mechanisms underpinning EOC omentum tropism have yet to be elucidated. Three-dimensional co-culture models were used to explore adipocyte-EOC interactions. The impact of adipocytes on EOC proliferation, response to therapy and invasive capacity was assessed. Primary adipocytes and omental tissue were isolated from patients with ovarian malignancies and benign ovarian neoplasms. Exosomes were isolated from omentum tissue conditioned media and the effect of omentum-derived exosomes on EOC evaluated. Exosomal microRNA (miRNA) sequencing was used to identify miRNAs abundant in omental exosomes and EOC cells were transfected with highly abundant miRNAs miR-21, let-7b, miR-16 and miR-92a. We demonstrate the capacity of adipocytes to induce an invasive phenotype in EOC populations through driving epithelial-to-mesenchymal transition (EMT). Exosomes secreted by omental tissue of ovarian cancer patients, as well as patients without malignancies, induced proliferation, upregulated EMT markers and reduced response to paclitaxel therapy in EOC cell lines and HGSOC patient samples. Analysis of the omentum-derived exosomes from cancer patients revealed highly abundant miRNAs that included miR-21, let-7b, miR-16 and miR-92a that promoted cancer cell proliferation and protection from chemotherapy when transfected in ovarian cancer cells. These observations highlight the capacity of omental adipocytes to generate a pro-tumorigenic and chemoprotective microenvironment in ovarian cancer and other adipose-related malignancies.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142267726","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":"Extracellular vesicles from highly invasive melanoma subpopulations increase the invasive capacity of less invasive melanoma cells through mir-1246-mediated inhibition of CCNG2","authors":"Tim Kingreen, Stefanie Kewitz-Hempel, Christian Rohde, Gerd Hause, Cord Sunderkötter, Dennis Gerloff","doi":"10.1186/s12964-024-01820-6","DOIUrl":"https://doi.org/10.1186/s12964-024-01820-6","url":null,"abstract":"Invasive growth is a critical process in tumor progression, requiring the activation of various molecular processes in tumor cells at the invasive front. Intercellular communication between heterogeneous tumor cells enhances cellular activation and adaptation to specific microenvironments. One mechanism of intercellular communication is the delivery of miRNAs through tumor cell-derived extracellular vesicles (EVs). In this context we have observed that conditioned media from a highly invasive cell subpopulation (BLM-HI) enhances the invasive capacity of the parental cell line (BLM). Therefore, we hypothesized that this complex change of cellular behavior is influenced by EV-transported miRNAs. The treatment of BLM cells with EVs derived from BLM-HI cells resulted in a significantly enhanced invasive capacity, as observed in Matrigel-embedded spheroids and in 2D Boyden chamber assays, with a dose-dependent effect. Conversely, the invasive capacity of BLM cells was reduced when secretion of EVs was inhibited by a sphingomyelinase inhibitor. To investigate the molecular mechanisms behind this effect, we performed next-generation sequencing and identified an enrichment of miR-1246 in these EVs. In functional analyses we demonstrated that both the EV mediated delivery of miR-1246 as well as overexpression contributes to the enhanced invasiveness of BLM cells. We identified a binding site of miR-1246 in the 3’UTR of cyclin G2 (CCNG2) and demonstrated direct binding by a luciferase reporter assay. Increased expression of CCNG2 has been associated with cancer metastasis and poor patient outcomes in other malignancies. Our study demonstrates that intercellular communication contributes to the transfer of properties, such as increased invasive capacity, between heterogeneous melanoma cells via EV-transported miRNAs.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142267770","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":"ONC212, alone or in synergistic conjunction with Navitoclax (ABT-263), promotes cancer cell apoptosis via unconventional mitochondrial-independent caspase-3 activation","authors":"Vishal Basu, Shabnam, Yamini Murghai, Maqsood Ali, Swetangini Sahu, Bhupendra K. Verma, Mahendra Seervi","doi":"10.1186/s12964-024-01817-1","DOIUrl":"https://doi.org/10.1186/s12964-024-01817-1","url":null,"abstract":"Mitochondria-targeting agents, known as mitocans, are emerging as potent cancer therapeutics due to pronounced metabolic and apoptotic adaptations in the mitochondria of cancer cells. ONC212, an imipridone-family compound initially identified as a ClpP agonist, is currently under investigation as a potential mitocan with demonstrated preclinical efficacy against multiple malignancies. Despite this efficacy, the molecular mechanism underlying the cell death induced by ONC212 remains unclear. This study systematically investigates the mitochondrial involvement and signaling cascades associated with ONC212-induced cell death, utilizing HeLa and A549 cancer cells. Treated cancer cells exhibited characteristic apoptotic features, such as annexin-V positivity and caspase-3 activation; however, these occurred independently of typical mitochondrial events like membrane potential loss (ΔΨm) and cytochrome c release, as well as caspase-8 activation associated with the extrinsic pathway. Additionally, ONC212 treatment increased the expression of anti-apoptotic proteins Bcl-2 and Bcl-xL, which impeded apoptosis, as the overexpression of Bcl-2-GFP and Bcl-xL-GFP significantly reduced ONC212-mediated cell death. Furthermore, combining a sub-lethal dose of the Bcl-2/Bcl-xL inhibitor Navitoclax with ONC212 markedly augmented caspase-3 activation and cell death, still without any notable ΔΨm loss or cytochrome c release. Moreover, inhibition of caspase-9 activity unexpectedly augmented, rather than attenuated, caspase-3 activation and the subsequent cell death. Collectively, our research identifies ONC212 as an atypical mitochondrial-independent, yet Bcl-2/Bcl-xL-inhibitable, caspase-3-mediated apoptotic cell death inducer, highlighting its potential for combination therapies in tumors with defective mitochondrial apoptotic signaling.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182123","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":"Bivalent chromatin accommodates survivin and BRG1/SWI complex to activate DNA damage response in CD4+ cells","authors":"Venkataragavan Chandrasekaran, Karin M. E. Andersson, Malin Erlandsson, Shuxiang Li, Torbjörn Nur Olsson, Maria-Jose Garcia-Bonete, Eric Malmhäll-Bah, Pegah Johansson, Gergely Katona, Maria I. Bokarewa","doi":"10.1186/s12964-024-01814-4","DOIUrl":"https://doi.org/10.1186/s12964-024-01814-4","url":null,"abstract":"Bivalent regions of chromatin (BvCR) are characterized by trimethylated lysine 4 (H3K4me3) and lysine 27 on histone H3 (H3K27me3) deposition which aid gene expression control during cell differentiation. The role of BvCR in post-transcriptional DNA damage response remains unidentified. Oncoprotein survivin binds chromatin and mediates IFNγ effects in CD4+ cells. In this study, we explored the role of BvCR in DNA damage response of autoimmune CD4+ cells in rheumatoid arthritis (RA). We performed deep sequencing of the chromatin bound to survivin, H3K4me3, H3K27me3, and H3K27ac, in human CD4+ cells and identified BvCR, which possessed all three histone H3 modifications. Protein partners of survivin on chromatin were predicted by integration of motif enrichment analysis, computational machine-learning, and structural modeling, and validated experimentally by mass spectrometry and peptide binding array. Survivin-dependent change in BvCR and transcription of genes controlled by the BvCR was studied in CD4+ cells treated with survivin inhibitor, which revealed survivin-dependent biological processes. Finally, the survivin-dependent processes were mapped to the transcriptome of CD4+ cells in blood and in synovial tissue of RA patients and the effect of modern immunomodulating drugs on these processes was explored. We identified that BvCR dominated by H3K4me3 (H3K4me3-BvCR) accommodated survivin within cis-regulatory elements of the genes controlling DNA damage. Inhibition of survivin or JAK-STAT signaling enhanced H3K4me3-BvCR dominance, which improved DNA damage recognition and arrested cell cycle progression in cultured CD4+ cells. Specifically, BvCR accommodating survivin aided sequence-specific anchoring of the BRG1/SWI chromatin-remodeling complex coordinating DNA damage response. Mapping survivin interactome to BRG1/SWI complex demonstrated interaction of survivin with the subunits anchoring the complex to chromatin. Co-expression of BRG1, survivin and IFNγ in CD4+ cells rendered complete deregulation of DNA damage response in RA. Such cells possessed strong ability of homing to RA joints. Immunomodulating drugs inhibited the anchoring subunits of BRG1/SWI complex, which affected arthritogenic profile of CD4+ cells. BvCR execute DNA damage control to maintain genome fidelity in IFN-activated CD4+ cells. Survivin anchors the BRG1/SWI complex to BvCR to repress DNA damage response. These results offer a platform for therapeutic interventions targeting survivin and BRG1/SWI complex in autoimmunity.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182124","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":"TMEM100 acts as a TAK1 receptor that prevents pathological cardiac hypertrophy progression","authors":"Bin-Bin Zhang, Yi-Lin Zhao, Yan-Yu Lu, Ji-Hong Shen, Hui-Yong Li, Han-Xue Zhang, Xiao-Yue Yu, Wen-Cai Zhang, Gang Li, Zhan-Ying Han, Sen Guo, Xu-Tao Zhang","doi":"10.1186/s12964-024-01816-2","DOIUrl":"https://doi.org/10.1186/s12964-024-01816-2","url":null,"abstract":"Pathological cardiac hypertrophy is the primary cause of heart failure, yet its underlying mechanisms remain incompletely understood. Transmembrane protein 100 (TMEM100) plays a role in various disorders, such as nervous system disease, pain and tumorigenesis, but its function in pathological cardiac hypertrophy is still unknown. In this study, we observed that TMEM100 is upregulated in cardiac hypertrophy. Functional investigations have shown that adeno-associated virus 9 (AAV9) mediated-TMEM100 overexpression mice attenuates transverse aortic constriction (TAC)-induced cardiac hypertrophy, including cardiomyocyte enlargement, cardiac fibrosis, and impaired heart structure and function. We subsequently demonstrated that adenoviral TMEM100 (AdTMEM100) mitigates phenylephrine (PE)-induced cardiomyocyte hypertrophy and downregulates the expression of cardiac hypertrophic markers in vitro, whereas TMEM100 knockdown exacerbates cardiomyocyte hypertrophy. The RNA sequences of the AdTMEM100 group and control group revealed that TMEM100 was involved in oxidative stress and the MAPK signaling pathway after PE stimulation. Mechanistically, we revealed that the transmembrane domain of TMEM100 (amino acids 53–75 and 85–107) directly interacts with the C-terminal region of TAK1 (amino acids 1–300) and inhibits the phosphorylation of TAK1 and its downstream molecules JNK and p38. TAK1-binding-defective TMEM100 failed to inhibit the activation of the TAK1-JNK/p38 pathway. Finally, the application of a TAK1 inhibitor (iTAK1) revealed that TAK1 is necessary for TMEM100-mediated cardiac hypertrophy. In summary, TMEM100 protects against pathological cardiac hypertrophy through the TAK1-JNK/p38 pathway and may serve as a promising target for the treatment of cardiac hypertrophy.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223790","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":"Correction: Acidic preconditioning induced intracellular acid adaptation to protect renal injury via dynamic phosphorylation of focal adhesion kinase-dependent activation of sodium hydrogen exchanger 1","authors":"Annan Chen, Jian Zhang, Zhixin Yan, Yufei Lu, Weize Chen, Yingxue Sun, Qiuyu Gu, Fang Li, Yan Yang, Shanfang Qiu, Xueping Lin, Dong Zhang, Jie Teng, Yi Fang, Bo Shen, Nana Song, Xiaoqiang Ding","doi":"10.1186/s12964-024-01815-3","DOIUrl":"https://doi.org/10.1186/s12964-024-01815-3","url":null,"abstract":"<p><b>Correction: Cell Commun Signal (2024) 22, 393</b></p><p>https://doi.org/10.1186/s12964-024-01773-w</p><p>Following the publication of the original article [1], the authors noticed that the acknowledgments section was inadvertently omitted. We sincerely apologize for this oversight. The missing acknowledgments are given in this correction article. </p><ol data-track-component=\"outbound reference\" data-track-context=\"references section\"><li data-counter=\"1.\"><p>Chen A, Zhang J, Yan Z, et al. Acidic preconditioning induced intracellular acid adaptation to protect renal injury via dynamic phosphorylation of focal adhesion kinase-dependent activation of sodium hydrogen exchanger 1. Cell Commun Signal. 2024;22:393. https://doi.org/10.1186/s12964-024-01773-w.</p><p>Article CAS PubMed PubMed Central Google Scholar </p></li></ol><p>Download references<svg aria-hidden=\"true\" focusable=\"false\" height=\"16\" role=\"img\" width=\"16\"><use xlink:href=\"#icon-eds-i-download-medium\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"></use></svg></p><p>We would like to express our deepest gratitude to Professor Liming Zhang, Dr. Yue Wang, and Dr. Yanlin Li (East China Normal University, China) for technical assistance in detecting pH value of ranal tissue by the Hemin/CNF microelectrode. We are also deeply thankful to Researcher Shuan Zhao and Dr. Zhouping Zou (Zhongshan Hospital, Fudan University, China) for their generous provision of critical experimental materials. This work was supported by grants from the National Natural Science Foundation of China (82070710), Shanghai Science and Technology Innovation Action Plan (21S219029001 and 22410714200), Shanghai Key Laboratory of Kidney and Blood Purification, Shanghai Science and Technology Commission (20DZ2271600), Shanghai Municipal Hospital Frontier Technology Project supported by Shanghai Shen Kang Hospital Development Center (SHDC2202230), Natural Science Foundation of Fujian Province (2022J011419), and Shanghai Municipal Key Clinical Specialty (shslczdzk02501).</p><span>Author notes</span><ol><li><p>Annan Chen, Jian Zhang and Zhixin Yan contributed equally to this work.</p></li></ol><h3>Authors and Affiliations</h3><ol><li><p>Department of Nephrology, Zhongshan Hospital, Fudan University, Shanghai Medical Center of Kidney, Shanghai Institute of Kidney and Dialysis, Shanghai Key Laboratory of Kidney and Blood Purification, Hemodialysis Quality Control Center of Shanghai, Shanghai, China</p><p>Annan Chen, Jian Zhang, Zhixin Yan, Yufei Lu, Weize Chen, Yingxue Sun, Qiuyu Gu, Fang Li, Yan Yang, Jie Teng, Yi Fang, Bo Shen, Nana Song & Xiaoqiang Ding</p></li><li><p>Department of Nephrology, Xiamen Branch, Zhongshan Hospital, Fudan University, Xiamen, China</p><p>Shanfang Qiu, Xueping Lin, Dong Zhang & Jie Teng</p></li><li><p>Fudan Zhangjiang Institute, Shanghai, China</p><p>Nana Song</p></li><li><p>Division of Nephrology, Zhongshan Hospital, Fudan University, Shanghai, PR China</p><p>Bo Shen, Nana Song & Xiaoq","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182125","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":"A novel amphiphilic squalene-based compound with open-chain polyethers reduces malignant melanoma metastasis in-vitro and in-vivo","authors":"Yaman Zhang, Meriem Bejaoui, Tran Ngoc Linh, Takashi Arimura, Hiroko Isoda","doi":"10.1186/s12964-024-01813-5","DOIUrl":"https://doi.org/10.1186/s12964-024-01813-5","url":null,"abstract":"Squalene (SQ) is a well-known antioxidant and anti-inflammatory agent that provides promising anti-aging and UV-protective roles on human skin. However, its strong hydrophobic nature, accompanied by issues such as poor solubility and limited tissue permeation, has created challenges for scientists to investigate its untapped potential in more complex conditions, including cancer progression. The present study assessed the potent anti-metastatic properties of a newly synthesized amphiphilic ethylene glycol SQ derivative (SQ-diEG) in melanoma, the most fatal skin cancer. In vitro and in vivo experiments have discovered that SQ-diEG may exert its potential on melanoma malignancy through the mitochondria-mediated caspase activation apoptotic signaling pathway. The potent anti-metastatic effect of SQ-diEG was observed in vitro using highly proliferative and aggressive melanoma cells. Administration of SQ-diEG (25 mg/kg) significantly decreased the tumor burden on the lung and inhibited the metastasis-associated proteins and gene markers in B16F10 lung colonization mice model. Furthermore, global gene profiling also revealed a promising role of SQ-diEG in tumor microenvironment. We anticipated that the amphiphilic nature of the SQ compound bearing ethylene glycol oligomers could potentially augment its ability to reach the pathology site, thus enhancing its therapeutic potential in melanoma.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182126","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":"Lipid metabolism reprogramming in endometrial cancer: biological functions and therapeutic implications","authors":"Xiangyu Wang, Yinuo Li, Xin Hou, Jingfang Li, Xiangyi Ma","doi":"10.1186/s12964-024-01792-7","DOIUrl":"https://doi.org/10.1186/s12964-024-01792-7","url":null,"abstract":"Endometrial cancer is one of the major gynecological cancers, with increasing incidence and mortality in the past decades. Emerging preclinical and clinical data have indicated its close association with obesity and dyslipidemia. Metabolism reprogramming has been considered as the hallmark of cancer, to satisfy the extensive need of nutrients and energy for survival and growth. Particularly, lipid metabolism reprogramming has aroused the researchers’ interest in the field of cancer, including tumorigenesis, invasiveness, metastasis, therapeutic resistance and immunity modulation, etc. But the roles of lipid metabolism reprogramming in endometrial cancer have not been fully understood. This review has summarized how lipid metabolism reprogramming induces oncogenesis and progression of endometrial cancer, including the biological functions of aberrant lipid metabolism pathway and altered transcription regulation of lipid metabolism pathway. Besides, we proposed novel therapeutic strategies of targeting lipid metabolism pathway and concentrated on its potential of sensitizing immunotherapy and hormonal therapy, to further optimize the existing treatment modalities of patients with advanced/metastatic endometrial cancer. Moreover, we expect that targeting lipid metabolism plus hormone therapy may block the endometrial malignant transformation and enrich the preventative approaches of endometrial cancer. Lipid metabolism reprogramming plays an important role in tumor initiation and cancer progression of endometrial cancer. Targeting the core enzymes and transcriptional factors of lipid metabolism pathway alone or in combination with immunotherapy/hormone treatment is expected to decrease the tumor burden and provide promising treatment opportunity for patients with advanced/metastatic endometrial cancer.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182129","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":"Calpain-1 weakens the nuclear envelope and promotes the release of neutrophil extracellular traps","authors":"Jeeshan Singh, Leticija Zlatar, Marco Muñoz-Becerra, Günter Lochnit, Irmgard Herrmann, Felix Pfister, Christina Janko, Jasmin Knopf, Moritz Leppkes, Janina Schoen, Luis E. Muñoz, Georg Schett, Martin Herrmann, Christine Schauer, Aparna Mahajan","doi":"10.1186/s12964-024-01785-6","DOIUrl":"https://doi.org/10.1186/s12964-024-01785-6","url":null,"abstract":"The inducers of neutrophil extracellular trap (NET) formation are heterogeneous and consequently, there is no specific pathway or signature molecule indispensable for NET formation. But certain events such as histone modification, chromatin decondensation, nuclear envelope breakdown, and NET release are ubiquitous. During NET formation, neutrophils drastically rearrange their cytoplasmic, granular and nuclear content. Yet, the exact mechanism for decoding each step during NET formation still remains elusive. Here, we investigated the mechanism of nuclear envelope breakdown during NET formation. Immunofluorescence microscopic evaluation revealed a gradual disintegration of outer nuclear membrane protein nesprin-1 and alterations in nuclear morphology during NET formation. MALDI-TOF analysis of NETs that had been generated by various inducers detected the accumulation of nesprin-1 fragments. This suggests that nesprin-1 degradation occurs before NET release. In the presence of a calpain-1, inhibitor nesprin-1 degradation was decreased in calcium driven NET formation. Microscopic evaluation confirmed that the disintegration of the lamin B receptor (LBR) and the collapse of the actin cytoskeleton occurs in early and later phases of NET release, respectively. We conclude that the calpain-1 degrades nesprin-1, orchestrates the weakening of the nuclear membrane, contributes to LBR disintegration, and promoting DNA release and finally, NETs formation.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182130","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":"Targeting the EphA2 pathway: could it be the way for bone sarcomas?","authors":"Giorgia Giordano, Cristina Tucciarello, Alessandra Merlini, Santina Cutrupi, Ymera Pignochino","doi":"10.1186/s12964-024-01811-7","DOIUrl":"https://doi.org/10.1186/s12964-024-01811-7","url":null,"abstract":"Bone sarcomas are malignant tumors of mesenchymal origin. Complete surgical resection is the cornerstone of multidisciplinary treatment. However, advanced, unresectable forms remain incurable. A crucial step towards addressing this challenge involves comprehending the molecular mechanisms underpinning tumor progression and metastasis, laying the groundwork for innovative precision medicine-based interventions. We previously showed that tyrosine kinase receptor Ephrin Type-A Receptor 2 (EphA2) is overexpressed in bone sarcomas. EphA2 is a key oncofetal protein implicated in metastasis, self-renewal, and chemoresistance. Molecular, genetic, biochemical, and pharmacological approaches have been developed to target EphA2 and its signaling pathway aiming to interfere with its tumor-promoting effects or as a carrier for drug delivery. This review synthesizes the main functions of EphA2 and their relevance in bone sarcomas, providing strategies devised to leverage this receptor for diagnostic and therapeutic purposes, with a focus on its applicability in the three most common bone sarcoma histotypes: osteosarcoma, chondrosarcoma, and Ewing sarcoma.","PeriodicalId":55268,"journal":{"name":"Cell Communication and Signaling","volume":null,"pages":null},"PeriodicalIF":8.4,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182002","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}