{"title":"Rotigaptide inhibits spontaneous contractions of gastric smooth muscle in diabetic rats via the PKCα-Cx43 pathway.","authors":"Lu Changri, Haibei Sun, Yitegele Bao, Mohan Zhang","doi":"10.1002/cbin.12253","DOIUrl":"https://doi.org/10.1002/cbin.12253","url":null,"abstract":"<p><p>The study aimed to investigate the effect of rotigaptide (ZP123) on spontaneous contractions of gastric smooth muscle in diabetic rats and explore the underlying mechanisms. Twelve rats were randomly divided into model and normal control groups. Changes in gastric smooth muscle spontaneous contractions in each group were observed. Western blot analysis was performed to detect Cx43 and PKCα expression. Rat gastric smooth muscle cells were cultured in vitro and divided into normal glucose, high glucose and high glucose+rotigaptide group. The intracellular Ca<sup>2+</sup> content was observed by immunofluorescence. The amplitude and frequency of gastric smooth muscle spontaneous contractions were reduced in the model group than the normal control group (all p < .01), which were reduced after rotigatide treatment than before treatment in the model group (all p < .01). The model+rotigaptide group showed decreased membrane expression of Cx43, increased cytoplasmic expression of Cx43, increased membrane expression of p-PKCα Thr<sup>497</sup> and lower membrane/cytoplasm ratio of Cx43 expression compared with the model group (all p < .01). The intracellular Ca<sup>2+</sup> content was increased in the high glucose group than the normal glucose group (p < .01), while no significant difference was observed between the high glucose+rotigaptide and high glucose groups. Our findings suggest that rotigatide can stabilize the intracellular Ca<sup>2+</sup> concentration in gastric smooth muscle cells under high glucose condition by upregulating PKCα activity and downregulating the number of GJs and the opening rate of GJ hemichannels through the PKCα-Cx43 pathway, thus inhibiting spontaneous contractions of gastric smooth muscle in diabetic rats.</p>","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142459184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yalin Zhu, Yi Gong, Yifei Wang, Zhengyu Jiang, Ying Yao, Xiaoyong Miao, Shuoer Wang, Yan Zhang, Jianping Cao
{"title":"Flurbiprofen axetil is involved in basal-like breast cancer metastasis via suppressing the MEK/ERK signaling pathway.","authors":"Yalin Zhu, Yi Gong, Yifei Wang, Zhengyu Jiang, Ying Yao, Xiaoyong Miao, Shuoer Wang, Yan Zhang, Jianping Cao","doi":"10.1002/cbin.12251","DOIUrl":"https://doi.org/10.1002/cbin.12251","url":null,"abstract":"<p><p>Flurbiprofen axetil is commonly utilized in clinical practice as one of the nonsteroidal anti-inflammatory drugs (NSAIDs) and is included in multimodal analgesia regimens postbreast cancer surgery. Numerous NSAIDs have been studied for their potential to both promote and inhibit cancer. Given the variability in their effects on tumors, further investigation into the specific role of flurbiprofen axetil is warranted. Therefore, the primary objective of this study was to assess the impact of flurbiprofen axetil on basal-like breast cancer (BLBC) metastasis and elucidate the underlying molecular mechanisms involved. The BLBC metastasis mouse model was established by caudal vein injection of tumor cells. The lung metastasis of breast cancer in mice and the effect of flurbiprofen axetil were assessed by in vivo bioluminescence imaging, hematoxylin and eosin staining and immunohistochemistry. In vitro, the results of flurbiprofen axetil on the proliferation, migration, and invasion of MDA-MB-231 human breast cancer cells and BT-549 human breast cancer cells were assessed by colony formation assay and transwell assay. The effects of flurbiprofen axetil on several tumor metastasis-related signaling pathway proteins were examined by western blot, and the reversal extent of the flurbiprofen axetil effect by Ro 67-7476 (ERK phosphorylation agonist) was detected by transwell assay. The results showed that flurbiprofen axetil significantly inhibited BLBC lung metastasis in mice. Flurbiprofen axetil similarly inhibited breast cancer cell migration and invasion in vitro but did not affect their proliferation. Mechanistic investigations have revealed that flurbiprofen axetil exerts a noteworthy inhibitory influence on the MEK/ERK pathway while exhibiting no significant alteration in the expression of other pathway proteins intricately associated with epithelial-mesenchymal transition. In conclusion, the inhibitory effect of flurbiprofen axetil on BLBC metastasis is characterized by its selectivity in targeting the MEK/ERK signaling pathway rather than exerting a broad impact on the global signaling pathway.</p>","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142371099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Darmadi Darmadi, Raed Obaid Saleh, Enwa Felix Oghenemaro, Maha Noori Shakir, Ahmed Hjazi, Zahraa F Hassan, Ahmed Hussein Zwamel, Sanoeva Matlyuba, Mahamedha Deorari, Shamam Kareem Oudah
{"title":"Role of SEL1L in the progression of solid tumors, with a special focus on its recent therapeutic potential.","authors":"Darmadi Darmadi, Raed Obaid Saleh, Enwa Felix Oghenemaro, Maha Noori Shakir, Ahmed Hjazi, Zahraa F Hassan, Ahmed Hussein Zwamel, Sanoeva Matlyuba, Mahamedha Deorari, Shamam Kareem Oudah","doi":"10.1002/cbin.12242","DOIUrl":"https://doi.org/10.1002/cbin.12242","url":null,"abstract":"<p><p>Since suppressor/enhancer of Lin-12-like (SEL1L) was cloned in 1997, various pieces of evidence from lower species suggest it plays a significant role in protein degradation via the ubiquitin-proteasome system. The relevance of SEL1L in many aspects of malignant transformation and tumorigenic events has been the subject of research, which has shown compelling in vitro and in vivo findings relating its altered expression to changes in tumor aggressiveness. The Endoplasmic Reticulum (ER) in tumor cells is crucial for preserving cellular proteostasis by inducing the unfolded protein response (UPR), a stress response. A crucial component of the UPR is ER-associated degradation (ERAD), which guards against ER stress-induced apoptosis and the removal of unfolded or misfolded proteins by the ubiquitin-proteasome system. As a protein stabilizer of HMG-CoA reductase degradation protein 1 (HRD1), one of the main components of ERAD, SEL1L plays an important role in ER homeostasis. Notably, the expression levels of these two proteins fluctuate independently in various cancer types, yet changes in their expression affect the levels of other associated proteins during cancer pathogenesis. Recent studies have also outlined the function of SEL1L in cancer medication resistance. This review explores the value of targeting SEL1L as a novel treatment approach for cancer, focusing on the molecular processes of SEL1L and its involvement in cancer etiology.</p>","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142371101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qingshuang Mu, Qin Wang, Ye Yang, Ganghua Wei, Hao Wang, Jing Liao, Xinling Yang, Fan Wang
{"title":"HMGB1 promotes M1 polarization of macrophages and induces COPD inflammation.","authors":"Qingshuang Mu, Qin Wang, Ye Yang, Ganghua Wei, Hao Wang, Jing Liao, Xinling Yang, Fan Wang","doi":"10.1002/cbin.12252","DOIUrl":"https://doi.org/10.1002/cbin.12252","url":null,"abstract":"<p><p>Chronic obstructive pulmonary disease (COPD) is a pervasive and incapacitating respiratory condition, distinguished by airway inflammation and the remodeling of the lower respiratory tract. Central to its pathogenesis is an intricate inflammatory process, wherein macrophages exert significant regulatory functions, and High mobility group box 1 (HMGB1) emerges as a pivotal inflammatory mediator potentially driving COPD progression. This study explores the hypothesis that HMGB1, within macrophages, modulates COPD through inflammatory mechanisms, focusing on its influence on macrophage polarization. Our investigation uncovered that HMGB1 is upregulated in the context of COPD, associated with an enhanced proinflammatory M1 macrophage polarization induced by cigarette smoke. This polarization is linked to suppressed cell proliferation and induced apoptosis, indicative of HMGB1's role in the disease's inflammatory trajectory. The study further implicates HMGB1 in the activation of the Nuclear factor kappa-B (NF-κB) signaling pathway and chemokine signaling within macrophages, which are likely to amplify the inflammatory response characteristic of COPD. The findings underscore HMGB1's critical involvement in COPD pathogenesis, presenting it as a significant target for therapeutic intervention aimed at modulating macrophage polarization and inflammation.</p>","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142371100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Role of low-density cholesterol and Interleukin-17 interaction in breast cancer pathogenesis and treatment","authors":"Qingqing Liu, Rongyuan Yang, Dawei Wang, Qing Liu","doi":"10.1002/cbin.12250","DOIUrl":"https://doi.org/10.1002/cbin.12250","url":null,"abstract":"Breast cancer (BC) has become the most prevalent cancer worldwide, and further research is being conducted to deepen our understanding of its pathogenesis and treatment. Lipid metabolism disorder is a significant alteration in cancer cells, and the investigation into the role of Interleukin-17 (IL-17) in malignant tumors has emerged as a research focus in recent years. Thus, exploring changes in lipid metabolism and inflammatory factors in BC cells is crucial in identifying potential therapeutic targets. This article summarizes the progress made in the research on the main low-density cholesterol (LDL) transporter and IL-17 in lipid metabolism, and their potential involvement in the development of BC. The article aims to establish a theoretical foundation for the development of BC-related therapies.","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142317816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"EML4-ALK G1202R and EML4-ALK L1196M mutations induce crizotinib resistance in non-small cell lung cancer cells through activating epithelial–mesenchymal transition mediated by MDM2/MEK/ERK signal axis","authors":"Yuying Yang, Huan Yang, Yunhui Gao, Qian Yang, Xinya Zhu, Qianying Miao, Xiaobo Xu, Zengqiang Li, Daiying Zuo","doi":"10.1002/cbin.12249","DOIUrl":"https://doi.org/10.1002/cbin.12249","url":null,"abstract":"Crizotinib, as the first-generation of anaplastic lymphoma kinase (ALK) inhibitor, effectively improves the survival time of ALK-positive non-small cell lung cancer (NSCLC) patients. However, its efficacy is severely limited by drug resistance caused by secondary mutations. G1202R and L1196M are classical mutation sites located in ALK kinase domain. They may hinder the binding of ALK inhibitors to the target kinase domain, resulting in drug resistance in patients. However, the exact mechanism of drug resistance mediated by these mutations remains unclear. In this study, we aimed to evaluate how G1202R and L1196M mutations mediate crizotinib resistance. To explore the resistance mechanism, we constructed EML4-ALK G1202R and L1196M mutant cell lines with A549 cells. The results showed that the mutant cells exhibited significant epithelial–mesenchymal transition (EMT) and metastasis compared to control (A549-vector) or wild type (A549-EML4-ALK) cells. Subsequently, it was found that the occurrence of EMT was correlated to the high expression of murine double minute 2 (MDM2) protein and the activation of mitogen-activated protein kinase (MEK)/extracellular signal-regulated kinase (ERK) pathway in mutant cells. Down-regulation of MDM2 inhibited the activation of MEK/ERK pathway, thus reversed the EMT process and markedly increased the inhibitory effect of crizotinib on the growth of mutant cells. Collectively, resistance of ALK-positive NSCLC cells to crizotinib is induced by G1202R and L1196M mutations through activation of the MDM2/MEK/ERK signalling axis, promoting EMT process and metastasis. These findings suggest that the combination of MDM2 inhibitors and crizotinib could be a potential therapeutic strategy.","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142317808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Susanti, Muchamad Dafip, Dewi Mustikaningtyas, Agung Putra
{"title":"Predictive action of oncomiR in suppressing TP53 signaling pathway in hypoxia‐conditioned colon cancer cell line HCT‐116","authors":"R. Susanti, Muchamad Dafip, Dewi Mustikaningtyas, Agung Putra","doi":"10.1002/cbin.12243","DOIUrl":"https://doi.org/10.1002/cbin.12243","url":null,"abstract":"Hypoxia‐induced heterogeneity in colorectal cancer (CRC) significantly impacts patient survival by promoting chemoresistance. These conditions alter the regulation of miRNAs, key regulators of crucial processes like proliferation, apoptosis, and invasion, leading to tumor progression. Despite their promising potential as diagnostic and therapeutic targets, the underlying mechanisms by which miRNAs influence hypoxia‐mediated tumorigenesis remain largely unexplored. This study aims to elucidate the action of miRNAs in HCT‐116 colorectal cancer stem cells (CSCs) under hypoxia, providing valuable insights into their role in tumor adaptation and progression. MiRNA expression was determined using Nanostring nCounter, and bioinformatic analysis was performed to explain the molecular pathway. A total of 50 miRNAs were obtained with an average count of ≥ 20 reads for comparative expression analysis. The results showed that hypoxia‐affected 36 oncomiRs were increased in HCT‐116, and 14 suppressor‐miRs were increased in MSCs. The increase in miRNA expression occurred consistently from normoxia to hypoxia and significantly differed between mesenchymal stem cells (MSCs) and HCT‐116. Furthermore, miR‐16‐5p and miR‐29a‐3p were dominant in regulating the p53 signaling pathway, which is thought to be related to the escape mechanism against hypoxia and maintaining cell proliferation. More research with a genome‐transcriptome axis approach is needed to fully understand miRNAs’ role in adapting CRC cells and MSCs to hypoxia. Further research could focus on developing specific biomarkers for diagnosis. In addition, anti‐miR can be developed as a therapy to prevent cancer proliferation or inhibit the adaptation of cancer cells to hypoxia.","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142267126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yingying Jin, Shupei Pan, Mincong Wang, Shan Huang, Yue Ke, Dan Li, Hen Luo, Zhanfeng Kou, Dongwen Shi, Weihua Kou, Hongxiao Fu, Jiyuan Pan
{"title":"The m6A modification of ACSL4 mRNA sensitized esophageal squamous cell carcinoma to irradiation via accelerating ferroptosis","authors":"Yingying Jin, Shupei Pan, Mincong Wang, Shan Huang, Yue Ke, Dan Li, Hen Luo, Zhanfeng Kou, Dongwen Shi, Weihua Kou, Hongxiao Fu, Jiyuan Pan","doi":"10.1002/cbin.12245","DOIUrl":"https://doi.org/10.1002/cbin.12245","url":null,"abstract":"Radioresistance is a major obstacle for the therapy of esophageal squamous cell carcinoma (ESCC) and lead to a poor prognosis. Ferroptosis is supposed to be responsible for radioresistance. However, the ferroptosis‐induced radioresistance in ESCC and its related regulatory mechanisms are not yet fully understood. In this study, human ESCC cell line and the corresponding radioresistance cells were irradiated with 6 megavolts (MV) X‐ray. It was showed that irradiation led to less ferroptosis in radioresistant ESCC cells as compared to the parental cells, as depicted by transmission electron microscopy, intracellular Fe<jats:sup>2+</jats:sup> iron contents, lipid peroxidation, and expression of COX2. The increase of ASCL4 expression levels in radioresistant cells after radiotherapy was smaller than that in the parental cells. ACSL4 overexpression significantly enhanced ferroptosis. The fold increase in ACSL4 m<jats:sup>6</jats:sup>A modification in the radioresistant cells was significantly smaller than that in the parental cells as detected by methylated RNA immunoprecipitation with qRT‐PCR. METTL14 overexpression accelerated ferroptosis induced by irradiation via upregulating m<jats:sup>6</jats:sup>A modification of ACSL4 mRNA. In conclusions, ferroptosis ablation was responsible for the radioresistant of ESCC. The METTL14‐mediated m<jats:sup>6</jats:sup>A modification of ACSL4 mRNA sensitized ESCC to irradiation via accelerating ferroptosis. This study sheds new light on our understanding of radioresistant in ESCC, and provides potential strategies for ESCC radiotherapy.","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142267125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
João Vitor da Silva Viana, Lhara Ricarliany Medeiros de Oliveira, Luanna Lorenna Vieira Rodrigues, Yara Letícia Frutuoso e Silva, Ana Lívia Rocha Rodrigues, Alexandre Rodrigues Silva, Patrícia Vasconcelos Alves, Herlon Victor Rodrigues Silva, Alexsandra Fernandes Pereira
{"title":"Establishment and characterization of fibroblast lines from the northern tiger cat (Leopardus tigrinus, Schreber, 1775) during extended passage and cryopreservation","authors":"João Vitor da Silva Viana, Lhara Ricarliany Medeiros de Oliveira, Luanna Lorenna Vieira Rodrigues, Yara Letícia Frutuoso e Silva, Ana Lívia Rocha Rodrigues, Alexandre Rodrigues Silva, Patrícia Vasconcelos Alves, Herlon Victor Rodrigues Silva, Alexsandra Fernandes Pereira","doi":"10.1002/cbin.12244","DOIUrl":"https://doi.org/10.1002/cbin.12244","url":null,"abstract":"The establishment of fibroblast lines enables several applications from the formation of biobanks for the conservation of biodiversity to the use of these cells in physiological and toxicological assays. Considered a species vulnerable to extinction, the characterization of fibroblastic lines of northern tiger cat would contribute to its conservation. Therefore, we established and characterized fibroblasts derived from northern tiger cat during extended passage (third, seventh, and eleventh passages) and cryopreservation with regard to the morphology, viability, apoptotic classification, metabolism, proliferative activity, and oxidative stress by reactive oxygen species (ROS) levels and mitochondrial membrane potential (ΔΨm). Initially, we identified four dermal fibroblast lines by morphology, immunophenotyping, and karyotyping assays. <jats:italic>In vitro</jats:italic> culture after the third, seventh, and eleventh passages did not affect the viability, apoptotic classification, and ROS levels. Nevertheless, cells at seventh and eleventh passages featured a reduction in metabolism and an alteration in ΔΨm when compared to third passage cells. Additionally, cells at eleventh passage showed changes in the proliferative activity and morphology when compared to other passages. Regarding cryopreservation, no effect was observed on cryopreserved cells for morphology, viability, apoptotic classification, metabolism, and proliferative activity. Nevertheless, cryopreserved cells had alteration for ROS levels and ΔΨm. In summary, fibroblasts from northern tiger cat were affected by extended passage (seventh and eleventh passages) and cryopreservation. Adjustments to the in vitro culture and cryopreservation are necessary to reduce cellular oxidative stress caused by in vitro conditions.","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142267350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Breast cancer cell derived exosomes reduces glycolysis of activated CD8 + T cells in a AKT-mTOR dependent manner","authors":"Abhishek Choudhury, Soumya Chatterjee, Shauryabrota Dalui, Pronabesh Ghosh, Altamas Hossain Daptary, Golam Kibria Mollah, Arindam Bhattacharyya","doi":"10.1002/cbin.12241","DOIUrl":"https://doi.org/10.1002/cbin.12241","url":null,"abstract":"Cytotoxic CD8<sup>+</sup> T cells plays a pivotal role in the adaptive immune system to protect the organism against infections and cancer. During activation and response, T cells undergo a metabolic reprogramming that involves various metabolic pathways, with a predominant reliance on glycolysis to meet their increased energy demands and enhanced effector response. Recently, extracellular vesicles (EVs) known as exosomes have been recognized as crucial signaling mediators in regulating the tumor microenvironment (TME). Recent reports indicates that exosomes may transfer biologically functional molecules to the recipient cells, thereby facilitate cancer progression, angiogenesis, metastasis, drug resistance, and immunosuppression by reprogramming the metabolism of cancer cells. This study sought to enlighten possible involvement of cancer-derived exosomes in CD8 + T cell glucose metabolism and discover a regulated signalome as a mechanism of action. We observed reduction in glucose metabolism due to downregulation of AKT/mTOR signalome in activated CD8 + T cells after cancer derived exosome exposure. In-vivo murine breast tumor studies showed better tumor control and antitumor CD8 + T cell glycolysis and effector response after abrogation of exosome release from breast cancer cells. Summarizing, the present study establishes an immune evasion mechanism of breast cancer cell secreted exosomes that will act as a foundation for future precision cancer therapeutics.","PeriodicalId":9806,"journal":{"name":"Cell Biology International","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}