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Fu JT, Liu J, Wu WB, Chen YT, Lu GD, Cao Q, Meng HB, Tong J, Zhu JH, Wang XJ, Liu Y, Zhuang C, Sheng C, Shen FM, Liu X, Wang H, Yu Y, Zhang Y, Liang HY, Zhang JB, Li DJ, Li X, Wang ZB, Wang P. Targeting EFHD2 inhibits interferon-γ signaling and ameliorates non-alcoholic steatohepatitis. J Hepatol 2024; 81:389-403. [PMID: 38670321 DOI: 10.1016/j.jhep.2024.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 04/03/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024]
Abstract
BACKGROUND & AIMS The precise pathomechanisms underlying the development of non-alcoholic steatohepatitis (NASH, also known as metabolic dysfunction-associated steatohepatitis [MASH]) remain incompletely understood. In this study, we investigated the potential role of EF-hand domain family member D2 (EFHD2), a novel molecule specific to immune cells, in the pathogenesis of NASH. METHODS Hepatic EFHD2 expression was characterized in patients with NASH and two diet-induced NASH mouse models. Single-cell RNA sequencing (scRNA-seq) and double-immunohistochemistry were employed to explore EFHD2 expression patterns in NASH livers. The effects of global and myeloid-specific EFHD2 deletion on NASH and NASH-related hepatocellular carcinoma were assessed. Molecular mechanisms underlying EFHD2 function were investigated, while chemical and genetic investigations were performed to assess its potential as a therapeutic target. RESULTS EFHD2 expression was significantly elevated in hepatic macrophages/monocytes in both patients with NASH and mice. Deletion of EFHD2, either globally or specifically in myeloid cells, improved hepatic steatosis, reduced immune cell infiltration, inhibited lipid peroxidation-induced ferroptosis, and attenuated fibrosis in NASH. Additionally, it hindered the development of NASH-related hepatocellular carcinoma. Specifically, deletion of myeloid EFHD2 prevented the replacement of TIM4+ resident Kupffer cells by infiltrated monocytes and reversed the decreases in patrolling monocytes and CD4+/CD8+ T cell ratio in NASH. Mechanistically, our investigation revealed that EFHD2 in myeloid cells interacts with cytosolic YWHAZ (14-3-3ζ), facilitating the translocation of IFNγR2 (interferon-γ receptor-2) onto the plasma membrane. This interaction mediates interferon-γ signaling, which triggers immune and inflammatory responses in macrophages during NASH. Finally, a novel stapled α-helical peptide targeting EFHD2 was shown to be effective in protecting against NASH pathology in mice. CONCLUSION Our study reveals a pivotal immunomodulatory and inflammatory role of EFHD2 in NASH, underscoring EFHD2 as a promising druggable target for NASH treatment. IMPACT AND IMPLICATIONS Non-alcoholic steatohepatitis (NASH) represents an advanced stage of non-alcoholic fatty liver disease (NAFLD); however, not all patients with NAFLD progress to NASH. A key challenge is identifying the factors that trigger inflammation, which propels the transition from simple fatty liver to NASH. Our research pinpointed EFHD2 as a pivotal driver of NASH, orchestrating the over-activation of interferon-γ signaling within the liver during NASH progression. A stapled peptide designed to target EFHD2 exhibited therapeutic promise in NASH mice. These findings support the potential of EFHD2 as a therapeutic target in NASH.
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Affiliation(s)
- Jiang-Tao Fu
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Jian Liu
- Department of Biliary Surgery, Eastern Hepatobiliary Surgery Hospital, Naval Medical University, Shanghai, China
| | - Wen-Bin Wu
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Yi-Ting Chen
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Guo-Dong Lu
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Qi Cao
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China; National Demonstration Center for Experimental Pharmaceutical Education, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Hong-Bo Meng
- Department of General Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jie Tong
- Department of Pharmacy, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jia-Hui Zhu
- Department of Pharmacy, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xu-Jie Wang
- Department of Pharmacy, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yi Liu
- Department of Pharmacy, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chunlin Zhuang
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China; National Demonstration Center for Experimental Pharmaceutical Education, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Chunquan Sheng
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China; National Demonstration Center for Experimental Pharmaceutical Education, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Fu-Ming Shen
- Department of Pharmacy, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xingguang Liu
- Department of Pathogen Biology, Second Military Medical University, Shanghai, China
| | - Hua Wang
- Department of Oncology, First Affiliated Hospital of Anhui Medical University, Hefei, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, China
| | - Yongsheng Yu
- School of Medicine, Shanghai University, Shanghai, China
| | - Yuefan Zhang
- School of Medicine, Shanghai University, Shanghai, China
| | - Hai-Yan Liang
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China; National Demonstration Center for Experimental Pharmaceutical Education, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Jia-Bao Zhang
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China; National Demonstration Center for Experimental Pharmaceutical Education, Naval Medical University/Second Military Medical University, Shanghai, China
| | - Dong-Jie Li
- Department of Pharmacy, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiang Li
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China; National Demonstration Center for Experimental Pharmaceutical Education, Naval Medical University/Second Military Medical University, Shanghai, China.
| | - Zhi-Bin Wang
- Department of Critical Care Medicine, School of Anesthesiology, Naval Medical University, Shanghai, China.
| | - Pei Wang
- The Center for Basic Research and Innovation of Medicine and Pharmacy (MOE), School of Pharmacy, Naval Medical University/Second Military Medical University, Shanghai, China; National Demonstration Center for Experimental Pharmaceutical Education, Naval Medical University/Second Military Medical University, Shanghai, China.
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Mull ML, Pratt SJP, Thompson KN, Annis DA, Gad AA, Lee RM, Chang KT, Stemberger MB, Ju JA, Gilchrist DE, Boyman L, Vitolo MI, Lederer WJ, Martin SS. Disruption of P2Y2 signaling promotes breast tumor cell dissemination by reducing ATP-dependent calcium elevation and actin localization to cell junctions. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.03.31.533191. [PMID: 37034765 PMCID: PMC10081304 DOI: 10.1101/2023.03.31.533191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The tumor microenvironment and wound healing after injury both contain extremely high concentrations of the extracellular signaling molecule, adenosine triphosphate (ATP) compared to normal tissue. P2Y2 receptor, an ATP-activated purinergic receptor, is typically associated with pulmonary, endothelial, and neurological cell signaling. Here we report its role and importance in breast epithelial cell signaling and how it is altered in metastatic breast cancer. In response to ATP activation, P2Y2 receptor signaling causes an increase of intracellular Ca 2+ in non-tumorigenic breast epithelial cells, while their tumorigenic and metastatic counterparts have significantly reduced Ca 2+ responses. The non-tumorigenic cells respond to increased Ca 2+ with actin polymerization and localization to cell edges, while the metastatic cells remained unaffected. The increase in intracellular Ca 2+ after ATP stimulation was blunted using a P2Y2 antagonist, which also prevented actin mobilization and caused cell dissemination from spheroids in non-tumorigenic breast epithelial cells. Furthermore, the lack of Ca 2+ concentration changes and actin mobilization in the metastatic breast cancer cells could be due to reduced P2Y2 expression, which correlates with poorer overall survival in breast cancer patients. This study elucidates rapid changes that occur after elevated intracellular Ca 2+ in breast epithelial cells and how metastatic cancer cells have adapted to evade this cellular response.
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Wu J, Xu X, Duan J, Chai Y, Song J, Gong D, Wang B, Hu Y, Han T, Ding Y, Liu Y, Li J, Cao X. EFHD2 suppresses intestinal inflammation by blocking intestinal epithelial cell TNFR1 internalization and cell death. Nat Commun 2024; 15:1282. [PMID: 38346956 PMCID: PMC10861516 DOI: 10.1038/s41467-024-45539-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 01/23/2024] [Indexed: 02/15/2024] Open
Abstract
TNF acts as one pathogenic driver for inducing intestinal epithelial cell (IEC) death and substantial intestinal inflammation. How the IEC death is regulated to physiologically prevent intestinal inflammation needs further investigation. Here, we report that EF-hand domain-containing protein D2 (EFHD2), highly expressed in normal intestine tissues but decreased in intestinal biopsy samples of ulcerative colitis patients, protects intestinal epithelium from TNF-induced IEC apoptosis. EFHD2 inhibits TNF-induced apoptosis in primary IECs and intestinal organoids (enteroids). Mice deficient of Efhd2 in IECs exhibit excessive IEC death and exacerbated experimental colitis. Mechanistically, EFHD2 interacts with Cofilin and suppresses Cofilin phosphorylation, thus blocking TNF receptor I (TNFR1) internalization to inhibit IEC apoptosis and consequently protecting intestine from inflammation. Our findings deepen the understanding of EFHD2 as the key regulator of membrane receptor trafficking, providing insight into death receptor signals and autoinflammatory diseases.
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Affiliation(s)
- Jiacheng Wu
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Xiaoqing Xu
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Jiaqi Duan
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Yangyang Chai
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Jiaying Song
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Dongsheng Gong
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Bingjing Wang
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Ye Hu
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
- Frontier Research Center for Cell Response, Institute of Immunology, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Taotao Han
- Department of Gastroenterology, Key Laboratory of Gut Microbiota Translational Medicine Research, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Yuanyuan Ding
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
- Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences, Suzhou, 215123, China
| | - Yin Liu
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Jingnan Li
- Department of Gastroenterology, Key Laboratory of Gut Microbiota Translational Medicine Research, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China.
| | - Xuetao Cao
- Department of Immunology, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China.
- Frontier Research Center for Cell Response, Institute of Immunology, College of Life Sciences, Nankai University, Tianjin, 300071, China.
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Cristovao B, Rodrigues L, Catarino S, Abreu M, Gonçalves T, Domingues N, Girao H. Cx43-mediated hyphal folding counteracts phagosome integrity loss during fungal infection. Microbiol Spectr 2023; 11:e0123823. [PMID: 37733471 PMCID: PMC10581180 DOI: 10.1128/spectrum.01238-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 07/27/2023] [Indexed: 09/23/2023] Open
Abstract
Phagolysosomes are crucial organelles during the elimination of pathogens by host cells. The maintenance of their membrane integrity is vital during stressful conditions, such as during Candida albicans infection. As the fungal hyphae grow, the phagolysosome membrane expands to ensure that the growing fungus remains entrapped. Additionally, actin structures surrounding the hyphae-containing phagosome were recently described to damage and constrain these pathogens inside the host vacuoles by inducing their folding. However, the molecular mechanism involved in the phagosome membrane adaptation during this extreme expansion process is still unclear. The main goal of this study was to unveil the interplay between phagosomal membrane integrity and folding capacity of C. albicans-infected macrophages. We show that components of the repair machinery are gradually recruited to the expanding phagolysosomal membrane and that their inhibition diminishes macrophage folding capacity. Through an analysis of an RNAseq data set of C. albicans-infected macrophages, we identified Cx43, a gap junction protein, as a putative player involved in the interplay between lysosomal homeostasis and actin-related processes. Our findings further reveal that Cx43 is recruited to expand phagosomes and potentiates the hyphal folding capacity of macrophages, promoting their survival. Additionally, we reveal that Cx43 can act as an anchor for complexes involved in Arp2-mediated actin nucleation during the assembly of actin rings around hyphae-containing phagosomes. Overall, this work brings new insights on the mechanisms by which macrophages cope with C. albicans infection ascribing to Cx43 a new noncanonical regulatory role in phagosome dynamics during pathogen phagocytosis. IMPORTANCE Invasive candidiasis is a life-threatening fungal infection that can become increasingly resistant to treatment. Thus, strategies to improve immune system efficiency, such as the macrophage response during the clearance of the fungal infection, are crucial to ameliorate the current therapies. Engulfed Candida albicans, one of the most common Candida species, is able to quickly transit from yeast-to-hypha form, which can elicit a phagosomal membrane injury and ultimately lead to macrophage death. Here, we extend the understanding of phagosome membrane homeostasis during the hypha expansion and folding process. We found that loss of phagosomal membrane integrity decreases the capacity of macrophages to fold the hyphae. Furthermore, through a bioinformatic analysis, we reveal a new window of opportunities to disclose the mechanisms underlying the hyphal constraining process. We identified Cx43 as a new weapon in the armamentarium to tackle infection by potentiating hyphal folding and promoting macrophage survival.
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Affiliation(s)
- Beatriz Cristovao
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), Clinical Academic Centre of Coimbra (CACC), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - Lisa Rodrigues
- Center for Neurosciences and Cell Biology (CNC-UC), University of Coimbra, Coimbra, Portugal
| | - Steve Catarino
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), Clinical Academic Centre of Coimbra (CACC), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - Monica Abreu
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), Clinical Academic Centre of Coimbra (CACC), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - Teresa Gonçalves
- Faculty of Medicine, Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Center for Neurosciences and Cell Biology (CNC-UC), University of Coimbra, Coimbra, Portugal
| | - Neuza Domingues
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), Clinical Academic Centre of Coimbra (CACC), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - Henrique Girao
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), Clinical Academic Centre of Coimbra (CACC), University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
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5
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Hirschhäuser A, Molitor D, Salinas G, Großhans J, Rust K, Bogdan S. Single-cell transcriptomics identifies new blood cell populations in Drosophila released at the onset of metamorphosis. Development 2023; 150:dev201767. [PMID: 37681301 PMCID: PMC10560556 DOI: 10.1242/dev.201767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 08/31/2023] [Indexed: 09/09/2023]
Abstract
Drosophila blood cells called hemocytes form an efficient barrier against infections and tissue damage. During metamorphosis, hemocytes undergo tremendous changes in their shape and behavior, preparing them for tissue clearance. Yet, the diversity and functional plasticity of pupal blood cells have not been explored. Here, we combine single-cell transcriptomics and high-resolution microscopy to dissect the heterogeneity and plasticity of pupal hemocytes. We identified undifferentiated and specified hemocytes with different molecular signatures associated with distinct functions such as antimicrobial, antifungal immune defense, cell adhesion or secretion. Strikingly, we identified a highly migratory and immune-responsive pupal cell population expressing typical markers of the posterior signaling center (PSC), which is known to be an important niche in the larval lymph gland. PSC-like cells become restricted to the abdominal segments and are morphologically very distinct from typical Hemolectin (Hml)-positive plasmatocytes. G-TRACE lineage experiments further suggest that PSC-like cells can transdifferentiate to lamellocytes triggered by parasitoid wasp infestation. In summary, we present the first molecular description of pupal Drosophila blood cells, providing insights into blood cell functional diversification and plasticity during pupal metamorphosis.
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Affiliation(s)
- Alexander Hirschhäuser
- Institute of Physiology and Pathophysiology, Department of Molecular Cell Physiology, Philipps University Marburg, Emil-Mannkopff-Strasse 2, 35037 Marburg, Germany
| | - Darius Molitor
- Institute of Physiology and Pathophysiology, Department of Molecular Cell Physiology, Philipps University Marburg, Emil-Mannkopff-Strasse 2, 35037 Marburg, Germany
| | - Gabriela Salinas
- NGS-Integrative Genomics Core Unit, Department of Human Genetics, University Medical Center Göttingen, Justus von Liebig Weg 11, 37077 Göttingen, Germany
| | - Jörg Großhans
- Department of Biology, Philipps University Marburg, Karl-von-Frisch-Strasse 8, 35043 Marburg, Germany
| | - Katja Rust
- Institute of Physiology and Pathophysiology, Department of Molecular Cell Physiology, Philipps University Marburg, Emil-Mannkopff-Strasse 2, 35037 Marburg, Germany
| | - Sven Bogdan
- Institute of Physiology and Pathophysiology, Department of Molecular Cell Physiology, Philipps University Marburg, Emil-Mannkopff-Strasse 2, 35037 Marburg, Germany
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6
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Díaz Méndez AB, Sacconi A, Tremante E, Lulli V, Caprara V, Rosanò L, Goeman F, Carosi M, Di Giuliani M, Vari G, Silvani A, Pollo B, Garufi C, Ramponi S, Simonetti G, Ciusani E, Mandoj C, Scalera S, Villani V, Po A, Ferretti E, Regazzo G, Rizzo MG. A diagnostic circulating miRNA signature as orchestrator of cell invasion via TKS4/TKS5/EFHD2 modulation in human gliomas. J Exp Clin Cancer Res 2023; 42:66. [PMID: 36932446 PMCID: PMC10022260 DOI: 10.1186/s13046-023-02639-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 03/06/2023] [Indexed: 03/19/2023] Open
Abstract
BACKGROUND Altered microRNA profiles have been observed not only in tumour tissues but also in biofluids, where they circulate in a stable form thus representing interesting biomarker candidates. This study aimed to identify a microRNA signature as a non-invasive biomarker and to investigate its impact on glioma biology. METHODS MicroRNAs were selected using a global expression profile in preoperative serum samples from 37 glioma patients. Comparison between serum samples from age and gender-matched controls was performed by using the droplet digital PCR. The ROC curve and Kaplan-Meier survival analyses were used to evaluate the diagnostic/prognostic values. The functional role of the identified signature was assessed by gain/loss of function strategies in glioma cells. RESULTS A three-microRNA signature (miR-1-3p/-26a-1-3p/-487b-3p) was differentially expressed in the serum of patients according to the isocitrate dehydrogenase (IDH) genes mutation status and correlated with both patient Overall and Progression Free Survival. The identified signature was also downregulated in the serum of patients compared to controls. Consistent with these results, the signature expression and release in the conditioned medium of glioma cells was lower in IDH-wild type cells compared to the mutated counterpart. Furthermore, in silico analysis of glioma datasets showed a consistent deregulation of the signature according to the IDH mutation status in glioma tumour tissues. Ectopic expression of the signature negatively affects several glioma functions. Notably, it impacts the glioma invasive phenotype by directly targeting the invadopodia-related proteins TKS4, TKS5 and EFHD2. CONCLUSIONS We identified a three microRNA signature as a promising complementary or even an independent non-invasive diagnostic/prognostic biomarker. The signature displays oncosuppressive functions in glioma cells and impacts on proteins crucial for migration and invasion, providing potential targets for therapeutic intervention.
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Affiliation(s)
- Ana Belén Díaz Méndez
- grid.417520.50000 0004 1760 5276Department of Research, Advanced Diagnostics and Technological Innovation, Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
| | - Andrea Sacconi
- grid.417520.50000 0004 1760 5276Biostatistics and Bioinformatics Unit, Clinical Trial Center, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Elisa Tremante
- grid.417520.50000 0004 1760 5276Department of Research, Advanced Diagnostics and Technological Innovation, Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
| | - Valentina Lulli
- grid.416651.10000 0000 9120 6856Department of Hematology, Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Valentina Caprara
- grid.417520.50000 0004 1760 5276Preclinical Models and New Therapeutic Agents Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Laura Rosanò
- grid.417520.50000 0004 1760 5276Preclinical Models and New Therapeutic Agents Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
- grid.5326.20000 0001 1940 4177Institute of Molecular Biology and Pathology (IBPM), National Research Council (CNR), Rome, Italy
| | - Frauke Goeman
- grid.417520.50000 0004 1760 5276SAFU Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Mariantonia Carosi
- grid.417520.50000 0004 1760 5276Pathology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Marta Di Giuliani
- grid.417520.50000 0004 1760 5276Department of Research, Advanced Diagnostics and Technological Innovation, Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
| | - Giulia Vari
- grid.417520.50000 0004 1760 5276Department of Research, Advanced Diagnostics and Technological Innovation, Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
- grid.7841.aPhD Program in Molecular Medicine, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Antonio Silvani
- grid.417894.70000 0001 0707 5492Neuro-Oncology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Bianca Pollo
- grid.417894.70000 0001 0707 5492Neuro-Oncology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Carlo Garufi
- grid.416308.80000 0004 1805 3485Medical-Oncology Unit, San Camillo Forlanini Hospital, Rome, Italy
| | - Sara Ramponi
- grid.416308.80000 0004 1805 3485Medical-Oncology Unit, San Camillo Forlanini Hospital, Rome, Italy
| | - Giorgia Simonetti
- grid.417894.70000 0001 0707 5492Neuro-Oncology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Emilio Ciusani
- grid.417894.70000 0001 0707 5492Neuro-Oncology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Chiara Mandoj
- grid.417520.50000 0004 1760 5276Clinical Pathology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Stefano Scalera
- grid.417520.50000 0004 1760 5276SAFU Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
- grid.6530.00000 0001 2300 0941PhD Program in Cellular and Molecular Biology, Department of Biology, University of Rome “Tor Vergata”, Rome, Italy
| | - Veronica Villani
- grid.417520.50000 0004 1760 5276Neuro-Oncology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Agnese Po
- grid.7841.aDepartment of Experimental Medicine, Sapienza University, Rome, Italy
| | - Elisabetta Ferretti
- grid.7841.aDepartment of Experimental Medicine, Sapienza University, Rome, Italy
| | - Giulia Regazzo
- grid.417520.50000 0004 1760 5276Department of Research, Advanced Diagnostics and Technological Innovation, Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
| | - Maria Giulia Rizzo
- grid.417520.50000 0004 1760 5276Department of Research, Advanced Diagnostics and Technological Innovation, Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
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Lehne F, Bogdan S. Swip-1 promotes exocytosis of glue granules in the exocrine Drosophila salivary gland. J Cell Sci 2023; 136:286884. [PMID: 36727484 PMCID: PMC10038153 DOI: 10.1242/jcs.260366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 01/27/2023] [Indexed: 02/03/2023] Open
Abstract
Exocytosis is a fundamental cellular process by which cells secrete cargos from their apical membrane into the extracellular lumen. Cargo release proceeds in sequential steps that depend on coordinated assembly and organization of an actin cytoskeletal network. Here, we identified the conserved actin-crosslinking protein Swip-1 as a novel regulator controlling exocytosis of glue granules in the Drosophila salivary gland. Real-time imaging revealed that Swip-1 is simultaneously recruited with F-actin onto secreting granules in proximity to the apical membrane. We observed that Swip-1 is rapidly cleared at the point of secretory vesicle fusion and colocalizes with actomyosin network around the fused vesicles. Loss of Swip-1 function impairs secretory cargo expulsion, resulting in strongly delayed secretion. Thus, our results uncover a novel role of Swip-1 in secretory vesicle compression and expulsion of cargo during regulated exocytosis. Remarkably, this function neither requires Ca2+ binding nor dimerization of Swip-1. Our data rather suggest that Swip-1 regulates actomyosin activity upstream of Rho-GTPase signaling to drive proper vesicle membrane crumpling and expulsion of cargo.
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Affiliation(s)
- Franziska Lehne
- Institute of Physiology and Pathophysiology, Department of Molecular Cell Physiology, Philipps-University Marburg, 35037 Marburg, Germany
| | - Sven Bogdan
- Institute of Physiology and Pathophysiology, Department of Molecular Cell Physiology, Philipps-University Marburg, 35037 Marburg, Germany
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Lehne F, Bogdan S. Getting cells into shape by calcium-dependent actin cross-linking proteins. Front Cell Dev Biol 2023; 11:1171930. [PMID: 37025173 PMCID: PMC10070769 DOI: 10.3389/fcell.2023.1171930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 03/09/2023] [Indexed: 04/08/2023] Open
Abstract
The actin cytoskeleton represents a highly dynamic filament system providing cell structure and mechanical forces to drive a variety of cellular processes. The dynamics of the actin cytoskeleton are controlled by a number of conserved proteins that maintain the pool of actin monomers, promote actin nucleation, restrict the length of actin filaments and cross-link filaments into networks or bundles. Previous work has been established that cytoplasmic calcium is an important signal to rapidly relay information to the actin cytoskeleton, but the underlying mechanisms remain poorly understood. Here, we summarize new recent perspectives on how calcium fluxes are transduced to the actin cytoskeleton in a physiological context. In this mini-review we will focus on three calcium-binding EF-hand-containing actin cross-linking proteins, α-actinin, plastin and EFHD2/Swiprosin-1, and how these conserved proteins affect the cell's actin reorganization in the context of cell migration and wound closure in response to calcium.
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