{"title":"DDB2 expression lights the way for precision radiotherapy response in PDAC cells, with or without olaparib.","authors":"Julie Dardare, Andréa Witz, Margaux Betz, Aurélie François, Laureline Lamy, Marie Husson, Jessica Demange, Marie Rouyer, Aurélien Lambert, Jean-Louis Merlin, Pauline Gilson, Alexandre Harlé","doi":"10.1038/s41420-024-02188-9","DOIUrl":"https://doi.org/10.1038/s41420-024-02188-9","url":null,"abstract":"<p><p>Pancreatic ductal adenocarcinoma (PDAC) is one of the deadliest cancers. Therapeutic options for PDAC are primarily restricted to surgery in the early stages of the disease or chemotherapy in advanced disease. Only a subset of patients with germline defects in BRCA1/2 genes can potentially benefit from personalized therapy, with the PARP inhibitor olaparib serving as a maintenance treatment for metastatic disease. Although the role of radiotherapy in PDAC remains controversial, the use of radiosensitizers offers hope for improving cancer management. Previously, we have shown that damage-specific DNA binding protein 2 (DDB2) is a potential prognostic and predictive biomarker for chemotherapy response in PDAC. In this study, we investigated the function of DDB2 in radiotherapy response, with and without radiosensitization by olaparib in PDAC cells. Our findings demonstrated DDB2 resistance to radiation effects, thereby improving cell survival and enhancing the repair of ionizing radiation-induced DNA double-strand breaks. We observed that DDB2 expression enhances the cell cycle arrest in the G2 phase by phosphorylating Chk1 and Chk2 cell cycle checkpoints. Additionally, we identified a novel link between DDB2 and PARP1 in the context of radiotherapy, which enhances the expression and activity of PARP1. Our findings highlight the potential of low-DDB2 expression to potentiate the radiosensitization effect of olaparib in PDAC cells. Collectively, this study provides novel insights into the impacts of DDB2 in the radiotherapy response in PDAC, enabling its employment as a potential biomarker to predict resistance to radiation. Furthermore, DDB2 represents a significant step forward in precision radiotherapy by widening the scope of patients who can be benefiting from olaparib as a radiosensitizer. Hence, this research has the potential to enrich the limited use of radiotherapy in the care of patients with PDAC.</p>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"10 1","pages":"411"},"PeriodicalIF":6.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11436999/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142342398","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}
A Mehdad, G Xavier Reis, A A Souza, Jarg Barbosa, M M Ventura, S M de Freitas
{"title":"Correction to: A Bowman-Birk inhibitor induces apoptosis in human breast adenocarcinoma through mitochondrial impairment and oxidative damage following proteasome 20S inhibition.","authors":"A Mehdad, G Xavier Reis, A A Souza, Jarg Barbosa, M M Ventura, S M de Freitas","doi":"10.1038/s41420-024-02155-4","DOIUrl":"10.1038/s41420-024-02155-4","url":null,"abstract":"","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"10 1","pages":"409"},"PeriodicalIF":6.1,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11410821/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142280893","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":"Enhancers in T Cell development and malignant lesions","authors":"Tong Zhang, Lin Zou","doi":"10.1038/s41420-024-02160-7","DOIUrl":"https://doi.org/10.1038/s41420-024-02160-7","url":null,"abstract":"<p>Enhancers constitute a vital category of cis-regulatory elements with a Mediator complex within DNA sequences, orchestrating gene expression by activating promoters. In the development of T cells, some enhancers regulate the critical genes, which might also regulate T cell malignant lesions. This review is to comprehensively elucidate the contributions of enhancers in both normal T cell development and its malignant pathogenesis, proposing the idea that the precise subunits of the Mediator complex are the potential drug target for disrupting the specific gene enhancer for T cell malignant diseases.</p>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"48 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250496","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":"Neural stem cells derived from α-synuclein-knockdown iPS cells alleviate Parkinson’s disease","authors":"Chie-Hong Wang, Guan-Cyun Lin, Ru-Huei Fu, Yu-Chuen Huang, Shih-Yin Chen, Shinn-Zong Lin, Horng-Jyh Harn, Woei-Cherng Shyu, Yi‐Fang Huang, Long-Bin Jeng, Shih-Ping Liu","doi":"10.1038/s41420-024-02176-z","DOIUrl":"https://doi.org/10.1038/s41420-024-02176-z","url":null,"abstract":"<p>Stem cells have the potential to replace damaged or defective cells and assist in the development of treatments for neurodegenerative diseases, including Parkinson’s disease (PD) and Alzheimer’s disease. iPS cells derived from patient-specific somatic cells are not only ethically acceptable, but they also avoid complications relating to immune rejection. Currently, researchers are developing stem cell-based therapies for PD using induced pluripotent stem (iPS) cells. iPS cells can differentiate into cells from any of the three germ layers, including neural stem cells (NSCs). Transplantation of neural stem cells (NSCs) is an emerging therapy for treating neurological disorders by restoring neuronal function. Nevertheless, there are still challenges associated with the quality and source of neural stem cells. This issue can be addressed by genetically edited iPS cells. In this study, shRNA was used to knock down the expression of mutant α-synuclein (SNCA) in iPS cells that were generated from SNCA A53T transgenic mice, and these iPS cells were differentiated to NSCs. After injecting these NSCs into SNCA A53T mice, the therapeutic effects of these cells were evaluated. We found that the transplantation of neural stem cells produced from SNCA A53T iPS cells with knocking down SNCA not only improved SNCA A53T mice coordination abilities, balance abilities, and locomotor activities but also significantly prolonged their lifespans. The results of this study suggest an innovative therapeutic approach that combines stem cell therapy and gene therapy for the treatment of Parkinson’s disease.</p>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"64 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268705","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}
Zaiwu Yang, Miao Deng, Lin Ren, Zhaona Fan, Shiwen Yang, Suyang Liu, Xianyue Ren, Jinlong Gao, Bin Cheng, Juan Xia
{"title":"Pyroptosis of oral keratinocyte contributes to energy metabolic reprogramming of T cells in oral lichen planus via OPA1-mediated mitochondrial fusion","authors":"Zaiwu Yang, Miao Deng, Lin Ren, Zhaona Fan, Shiwen Yang, Suyang Liu, Xianyue Ren, Jinlong Gao, Bin Cheng, Juan Xia","doi":"10.1038/s41420-024-02174-1","DOIUrl":"https://doi.org/10.1038/s41420-024-02174-1","url":null,"abstract":"<p>Oral lichen planus (OLP) is a chronic inflammatory disease that is associated with an increased risk of carcinogenesis. The typical pathological features of OLP include submucosal T-cell banding, infiltration, and liquefactive degeneration of basal epithelial cells. However, the histological appearance of basal cell death cannot be explained by apoptosis of keratinocytes alone. The aim of this study was to explore a novel mechanism of epithelial cell death, pyroptosis, and its role in the development of OLP. The immunohistochemical results initially revealed pyroptosis in the epithelial cells of OLP. There was significant upregulation of pyroptosis-related inflammatory cytokines, specifically IL-1β. The expression of IL-1β is closely related to the severity of the patient’s condition. In vitro, the culture supernatant from epithelial cells and exogenous IL-1β significantly promote the proliferation and activation of T cells. This effect can be inhibited by neutralizing antibody or receptor inhibitor of IL-1β. Stimulation with exogenous IL-1β enhances both glycolysis and oxidative phosphorylation in T cells, with a more pronounced increase in glycolysis. This is due to the regulation of NAD<sup>+</sup> availability and mitochondrial dynamics by IL-1β. IL-1β specifically stimulates the expression of optic atrophy 1 (OPA1), particularly L-OPA1, which promotes mitochondrial fusion and increases NAD<sup>+</sup> availability. This process upregulated glycolysis in T cells. The knockdown of OPA1 reverses these changes by reducing the proliferation and activation of T cells. In this study, IL-1β promoted OPA1 transcription by activating the NF-κB pathway. The expression of OPA1 is inhibited by the inhibitor of NF-κB pathway. These results suggest that OLP keratinocytes undergo pyroptosis, which then secrete inflammatory factors that activate the NF-κB signaling pathway of T cells. This pathway regulates OPA1-mediated mitochondrial fusion and energy metabolism reprogramming in T cells, contributing to the development of OLP. These findings provide new insights into the mechanisms and therapeutic strategies for OLP.</p><figure></figure>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"2 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250500","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}
Saheli Chowdhury, Abhishek Sen, Debajyoti Das, Partha Chakrabarti
{"title":"Deubiquitinase JOSD1 tempers hepatic proteotoxicity","authors":"Saheli Chowdhury, Abhishek Sen, Debajyoti Das, Partha Chakrabarti","doi":"10.1038/s41420-024-02177-y","DOIUrl":"https://doi.org/10.1038/s41420-024-02177-y","url":null,"abstract":"<p>Derangements in protein homeostasis and associated proteotoxicity mark acute, chronic, and drug-induced hepatocellular injury. Metabolic dysfunction-associated proteasomal inhibition and the use of proteasome inhibitors often underlie such pathological hepatic proteotoxicity. In this study, we sought to identify a candidate deubiquitinating enzyme (DUB) responsible for reversing the proteotoxic damage. To this end, we performed a siRNA screening wherein 96 DUBs were individually knocked down in HepG2 cells under proteasomal inhibitor-induced stress for dual readouts, apoptosis, and cell viability. Among the putative hits, we chose JOSD1, a member of the Machado-Josephin family of DUBs that reciprocally increased cell viability and decreased cell death under proteotoxicity. JOSD1-mediated mitigation of proteotoxicity was further validated in primary mouse hepatocytes by gain and loss of function studies. Marked plasma membrane accumulation of monoubiquitinated JOSD1 in proteotoxic conditions is a prerequisite for its protective role, while the enzymatically inactive JOSD1 C36A mutant was conversely polyubiquitinated, does not have membrane localisation and fails to reverse proteotoxicity. Mechanistically, JOSD1 physically interacts with the suppressor of cytokine signalling 1 (SOCS1), deubiquitinates it and enhances its stability under proteotoxic stress. Indeed, SOCS1 expression is necessary and sufficient for the hepatoprotective function of JOSD1 under proteasomal inhibition. In vivo, adenovirus-mediated ectopic expression or depletion of JOSD1 in mice liver respectively protects or aggravates hepatic injury when challenged with proteasome blocker Bortezomib. Our study thus unveils JOSD1 as a potential candidate for ameliorating hepatocellular damage in liver diseases.</p>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"52 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250497","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}
Ran An, Chao Wu, Cunyu Tang, Chen Zhang, Feiru Han, Zeen Xu, Yiping Zou, Jun Wang, Zhiyong Yuan, Shengpeng Jiang, Lijie Liu, Chongbiao Huang, Zhen Tao
{"title":"Blockade of CD73 potentiates radiotherapy antitumor immunity and abscopal effects via STING pathway","authors":"Ran An, Chao Wu, Cunyu Tang, Chen Zhang, Feiru Han, Zeen Xu, Yiping Zou, Jun Wang, Zhiyong Yuan, Shengpeng Jiang, Lijie Liu, Chongbiao Huang, Zhen Tao","doi":"10.1038/s41420-024-02171-4","DOIUrl":"https://doi.org/10.1038/s41420-024-02171-4","url":null,"abstract":"<p>Radiotherapy (RT) is a crucial treatment for colorectal cancer (CRC) patients, but it often fails to induce systemic antitumor immunity. CD73, an immunomodulatory factor, is upregulated after RT and associated with poor prognosis in CRC patients. This study aims to elucidate the mechanisms driving RT-induced CD73 upregulation in CRC and investigate how combining RT with CD73 blockade stimulates immune responses and induces abscopal effects. Findings revealed that RT-induced CD73 upregulation is mediated by the ataxia telangiectasia and Rad3-related (ATR) pathway and correlated with RT tolerance, as demonstrated through flow cytometry, immunofluorescence, and Western Blotting. Using flow cytometry and multicolor immunofluorescence, experiments demonstrated that in CRC subcutaneous tumor models, combination therapy reduces the infiltration of myeloid-derived suppressor cells (MDSCs), tumor-associated macrophages (TAMs), and regulatory T cells (Tregs) while increasing dendritic cells (DCs) and CD8 + T cells, resulting in superior antitumor responses. Additionally, results from flow cytometry, Western Blot, and RNA sequencing demonstrated that combination therapy enhances the antigen-presenting ability of DCs and activates tumor antigen-specific CD8 + T cells, improving their function and delaying their depletion. The activation of the cGAS-STING and IFN-I pathways is crucial for this effect. In summary, the integration of RT with CD73 blockade effectively reverses the immunosuppressive TME and invigorates CD8 + T cell-driven, specific antitumor immune responses. These insights shed fresh light on the mechanisms governing the synergistic modulation of immunity by RT and CD73 blockade in CRC, offering promising avenues for the advancement of therapeutic strategies against CRC.</p>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"18 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250498","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}
Emilio G. Vozza, Alanna M. Kelly, Clíodhna M. Daly, Sinead A. O’Rourke, Simon R. Carlile, Brenda Morris, Aisling Dunne, Rachel M. McLoughlin
{"title":"Type 1 interferons promote Staphylococcus aureus nasal colonization by inducing phagocyte apoptosis","authors":"Emilio G. Vozza, Alanna M. Kelly, Clíodhna M. Daly, Sinead A. O’Rourke, Simon R. Carlile, Brenda Morris, Aisling Dunne, Rachel M. McLoughlin","doi":"10.1038/s41420-024-02173-2","DOIUrl":"https://doi.org/10.1038/s41420-024-02173-2","url":null,"abstract":"<p><i>Staphylococcus aureus</i> is an important human commensal which persistently colonizes up to 30% of the human population, predominantly within the nasal cavity. The commensal lifestyle of <i>S. aureus</i> is complex, and the mechanisms underpinning colonization are not fully understood. <i>S. aureus</i> can induce an immunosuppressive environment in the nasal tissue (NT) by driving IL-10 and IL-27 to facilitate nasal colonization, indicating that <i>S. aureus</i> has the capacity to modulate the local immune environment for its commensal habitation. Mounting evidence suggests commensal bacteria drive type 1 interferons (IFN-I) to establish an immunosuppressive environment and whilst <i>S. aureus</i> can induce IFN-I during infection, its role in colonization has not yet been examined. Here, we show that <i>S. aureus</i> preferentially induces IFN signaling in macrophages. This IFN-I in turn upregulates expression of proapoptotic genes within macrophages culminating in caspase-3 cleavage. Importantly, <i>S. aureus</i> was found to drive phagocytic cell apoptosis in the nasal tissue during nasal colonization in an IFN-I dependent manner with colonization significantly reduced under caspase-3 inhibition. Overall, loss of IFN-I signaling significantly diminished <i>S. aureus</i> nasal colonization implicating a pivotal role for IFN-I in controlling <i>S. aureus</i> persistence during colonization through its ability to induce phagocyte apoptosis. Together, this study reveals a novel strategy utilized by <i>S. aureus</i> to circumvent host immunity in the nasal mucosa to facilitate nasal colonization.</p>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"18 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250499","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}
Xinli Li, Guoqiang Yang, Lihong Ma, Bingxi Tang, Tao Tao
{"title":"N6-methyladenosine (m6A) writer METTL5 represses the ferroptosis and antitumor immunity of gastric cancer","authors":"Xinli Li, Guoqiang Yang, Lihong Ma, Bingxi Tang, Tao Tao","doi":"10.1038/s41420-024-02166-1","DOIUrl":"https://doi.org/10.1038/s41420-024-02166-1","url":null,"abstract":"<p>Emerging evidence has shown that ferroptosis and antitumor immunity response of T lymphocytes play critical roles in multiple malignancies, including gastric cancer (GC). Here, the present research aims to reveal the function of novel N<sup>6</sup>-methyladenosine (m<sup>6</sup>A) methyltransferase METTL5 on GC immune microenvironment. Clinically, elevated METTL5 was negatively correlated to the prognosis of GC patients. METTL5 high-expression repressed the Fe<sup>2+</sup> accumulation and ferroptosis to promote the GC immune evasion escaping from activated PBMCs’ killing effect. Mechanistically, upregulation of METTL5 promoted NRF2 mRNA stability, thereby inactivating the ferroptosis and repressing PBMCs’ cells antitumor immunity. One valuable finding is that ferroptosis inhibitor (Ferrostatin-1, Fer-1) could reduce the antitumor immunity of cocultured PBMCs. In other words, the increase of ferroptosis might contribute to the anti-tumor efficacy of immunotherapy. Further study revealed that m<sup>6</sup>A reader IGF2BP1 mediated the stability of NRF2 mRNA via METTL5/m<sup>6</sup>A/NRF2 axis. Collectively, these results demonstrate that METTL5 functions as an oncogene in GC immune microenvironment, and highlights a critical role in T lymphocytes’ antitumor immunity.</p>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"6 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142221110","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}
Longyu Miao, Chaoqun Yu, Ge Guan, Xiaoyu Luan, Xiaoshuang Jin, Meiqi Pan, Yuzhen Yang, Jiaoyang Yan, Peng Chen, Guohu Di
{"title":"Extracellular vesicles containing GAS6 protect the liver from ischemia-reperfusion injury by enhancing macrophage efferocytosis via MerTK-ERK-COX2 signaling","authors":"Longyu Miao, Chaoqun Yu, Ge Guan, Xiaoyu Luan, Xiaoshuang Jin, Meiqi Pan, Yuzhen Yang, Jiaoyang Yan, Peng Chen, Guohu Di","doi":"10.1038/s41420-024-02169-y","DOIUrl":"https://doi.org/10.1038/s41420-024-02169-y","url":null,"abstract":"<p>Hepatic ischemia-reperfusion injury (HIRI) is a significant issue during liver transplantation and surgery, contributing to the liver failure or even mortality. Although extracellular vesicles derived from mesenchymal stem cells (MSC-EVs) have shown substantial potentials in cell replacement therapy of various organ ischemia reperfusion injuries (IRIs), the precise mechanisms remain unclear. In this study, we demonstrate that systemic MSC-EVs administration is predominantly absorbed by macrophages, and verified that it could significantly reduce the liver injury and inflammatory response in mice suffering from HIRI. Furthermore, treatment with MSC-EVs induces macrophage polarization toward an anti-inflammatory phenotype. Mechanistically, proteomic profiling reveals an enrichment of growth arrest-specific 6 (GAS6) in MSC-EVs, significantly promoting the activation of myeloid-epithelial-reproductive tyrosine kinase/extracellular regulated protein kinases/cyclooxygenase 2 (MerTK/ERK/COX2) signaling pathway in macrophages and further enhancing their efferocytosis efficiency. Knockdown of GAS6 via lentiviral transfection or inhibition of MerTK using UNC2025 (a MerTK small molecule inhibitor) partially eliminates the protective effects of MSC-EVs on macrophage efferocytosis and liver injury. Overall, our findings support that MSC-EVs enriched GAS6 execute an anti-inflammation effect, highlighting that treatment based on the modulation of macrophage function by MSC-EVs as a promising approach in IRI.</p><figure><p>HIRI is a thorny problem after liver surgery such as liver transplantation. In a murine model of HIRI, MSC-EVs enriched GAS6 effectively enhance macrophage efferocytosis both in vivo and in vitro through the GAS6/MerTK/ERK/COX2 signaling pathway and significantly mitigate liver injury. This image was drawn by the authors.</p></figure>","PeriodicalId":9735,"journal":{"name":"Cell Death Discovery","volume":"11 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142221195","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}