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Kurotani R, Ono S, Miyano Y, Nakayama S, Liu H, Aibara D, Sakahara S, Sato M, Sato K, Inoue S, Shibata Y, Lee MP, Abe H, Kimura S. Secretoglobin 3A2 protects lung from developing cigarette smoke-induced pulmonary emphysema. Int J Biochem Cell Biol 2023; 157:106390. [PMID: 36796505 PMCID: PMC10118454 DOI: 10.1016/j.biocel.2023.106390] [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: 09/29/2022] [Revised: 01/25/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023]
Abstract
Secretoglobin (SCGB) 3A2 is a bioactive molecule exhibiting various functions such as improving allergic airway inflammation and pulmonary fibrosis and promoting bronchial branching and proliferation during lung development. To determine if and how SCGB3A2 is involved in chronic obstructive pulmonary disease (COPD), a multifactorial disease with both airway and emphysematous lesions, a COPD mouse model was created by exposing Scgb3a2-deficient (KO), Scgb3a2-lung-specific overexpressing (TG), and wild type (WT) mice to cigarette smoke (CS) for 6 months. The KO mice showed loss of lung structure under control condition, and CS exposure resulted in more expansion of airspace and destruction of alveolar wall than WT mouse lungs. In contrast, TG mouse lungs showed no significant changes after CS exposure. SCGB3A2 increased the expression and phosphorylation of signal transducers and activators of transcription (STAT)1 and STAT3, and the expression of α1-antitrypsin (A1AT) in mouse lung fibroblast-derived MLg cells and mouse lung epithelial-derived MLE-15 cells. In MLg cells, A1AT expression was decreased in Stat3-knockdown cells, and increased upon Stat3 overexpression. STAT3 formed a homodimer when cells were stimulated with SCGB3A2. Chromatin immunoprecipitation and reporter assays demonstrated that STAT3 binds to specific binding sites on the Serpina1a gene encoding A1AT and upregulates its transcription in lung tissues of mice. Furthermore, nuclear localization of phosphorylated STAT3 upon SCGB3A2 stimulation was detected by immunocytochemistry. These findings demonstrate that SCGB3A2 protects the lungs from the development of CS-induced emphysema by regulating A1AT expression through STAT3 signaling.
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Affiliation(s)
- Reiko Kurotani
- Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan.
| | - Sotaro Ono
- Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
| | - Yuki Miyano
- Genome Informatics Unit, Institute for Promotion of Medical Science Research, Yamagata University School of Medicine, Yamagata, Japan
| | - Shun Nakayama
- Department of Surgery, Tohoku University Graduate School of Medicine, Miyagi, Japan; Cancer Innovation Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - Huaitian Liu
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, USA; Laboratory of Human Carcinogenesis, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - Daisuke Aibara
- Cancer Innovation Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, USA; Faculty of Pharmaceutical Science, Fukuoka University, Japan
| | - Satoshi Sakahara
- Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
| | - Masamichi Sato
- Department of Cardiology, Pulmonology and Nephrology, Yamagata University School of Medicine, Yamagata, Japan
| | - Kento Sato
- Department of Cardiology, Pulmonology and Nephrology, Yamagata University School of Medicine, Yamagata, Japan
| | - Sumito Inoue
- Department of Cardiology, Pulmonology and Nephrology, Yamagata University School of Medicine, Yamagata, Japan
| | - Yoko Shibata
- Department of Pulmonary Medicine, Fukushima Medical University, Fukushima, Japan
| | - Maxwell P Lee
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - Hiroyuki Abe
- Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
| | - Shioko Kimura
- Cancer Innovation Laboratory, National Cancer Institute, National Institutes of Health, Bethesda, USA
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Menon PR, Doudin A, Gregus A, Wirths O, Staab J, Meyer T. The anti-parallel dimer binding interface in STAT3 transcription factor is required for the inactivation of cytokine-mediated signal transduction. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:119118. [PMID: 34390807 DOI: 10.1016/j.bbamcr.2021.119118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 07/30/2021] [Accepted: 08/05/2021] [Indexed: 10/20/2022]
Abstract
Signal transducer and activator of transcription 3 (STAT3) gain-of-function mutations have been widely reported in patients with tumors and haematological malignancies. However, the molecular mechanisms of these pathogenic mutations remain largely uninvestigated. In this study, we have extensively characterized two STAT3 missense mutations, namely a valine-to-alanine exchange in the amino-terminal region (V77A) and a phenylalanine-to-alanine substitution (F174A) in the coiled-coil domain. The two mutants displayed elevated levels of tyrosine phosphorylation, premature nuclear accumulation, and differential transcriptional responses following stimulation of cells with interleukin-6 and interferon-ɣ. In line with their hyper-phosphorylated status, a greater fraction of V77A and F174A proteins was bound to DNA on high-affinity binding sites termed sis-inducible elements (SIE) as compared to the wild-type (WT) protein. Unexpectedly, these STAT3 variants displayed similar kinetics using in vitro kinase and dephosphorylation assays performed with recombinant Janus kinase 2 (JAK2) and Tc45 phosphatase, respectively. This indicates that the two mutations neither affected the susceptibility of STAT3 to the enzymatic activity of the inactivating tyrosine phosphatase nor to the activating kinase. However, experiments triggering intracellular dephosphorylation by the addition of the tyrosine-kinase inhibitor staurosporine to cytokine-pretreated cells showed that the two mutants partially resisted dephosphorylation. From these data, we propose that the F174A missense mutation hinders the exchange from a parallel to an anti-parallel dimer conformation, thereby increasing the ratio of tyrosine-phosphorylated molecules bound to DNA and enhancing gene-dependent transcription. Our data point to the physiological importance of the anti-parallel dimer conformation in the inactivation of the cytokine-induced STAT3 signalling pathway.
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Affiliation(s)
- Priyanka Rajeev Menon
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Centre Göttingen, and German German Centre for Cardiovascular Research (DZHK), partner site Göttingen, Germany
| | - Asmma Doudin
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Centre Göttingen, and German German Centre for Cardiovascular Research (DZHK), partner site Göttingen, Germany
| | - Anke Gregus
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Centre Göttingen, and German German Centre for Cardiovascular Research (DZHK), partner site Göttingen, Germany
| | - Oliver Wirths
- Department of Psychiatry and Psychotherapy, University Medical Centre Göttingen; Germany
| | - Julia Staab
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Centre Göttingen, and German German Centre for Cardiovascular Research (DZHK), partner site Göttingen, Germany
| | - Thomas Meyer
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Centre Göttingen, and German German Centre for Cardiovascular Research (DZHK), partner site Göttingen, Germany.
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Harrison AR, Todd S, Dearnley M, David CT, Green D, Rawlinson SM, Au GG, Marsh GA, Moseley GW. Antagonism of STAT3 signalling by Ebola virus. PLoS Pathog 2021; 17:e1009636. [PMID: 34166464 PMCID: PMC8224886 DOI: 10.1371/journal.ppat.1009636] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 05/12/2021] [Indexed: 12/25/2022] Open
Abstract
Many viruses target signal transducers and activators of transcription (STAT) 1 and 2 to antagonise antiviral interferon signalling, but targeting of signalling by other STATs/cytokines, including STAT3/interleukin 6 that regulate processes important to Ebola virus (EBOV) haemorrhagic fever, is poorly defined. We report that EBOV potently inhibits STAT3 responses to interleukin-6 family cytokines, and that this is mediated by the interferon-antagonist VP24. Mechanistic analysis indicates that VP24 effects a unique strategy combining distinct karyopherin-dependent and karyopherin-independent mechanisms to antagonise STAT3-STAT1 heterodimers and STAT3 homodimers, respectively. This appears to reflect distinct mechanisms of nuclear trafficking of the STAT3 complexes, revealed for the first time by our analysis of VP24 function. These findings are consistent with major roles for global inhibition of STAT3 signalling in EBOV infection, and provide new insights into the molecular mechanisms of STAT3 nuclear trafficking, significant to pathogen-host interactions, cell physiology and pathologies such as cancer. Ebola virus (EBOV) continues to pose a significant risk to human health globally, causing ongoing disease outbreaks with case-fatality rates between 40 and 65%. Suppression of immune responses is a critical component of EBOV haemorrhagic fever, but understanding of EBOV impact on signalling by cytokines other than interferon is limited. We find that infectious EBOV inhibits interleukin-6 cytokine signalling via antagonism of STAT3. The antagonistic strategy uniquely combines two distinct mechanisms, which appear to reflect differing nuclear trafficking mechanisms of critical STAT3 complexes. This provides fundamental insights into the mechanisms of pathogenesis of a lethal virus, and biology of STAT3, a critical player in immunity, development, growth and cancer.
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Affiliation(s)
- Angela R. Harrison
- Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Shawn Todd
- Australian Centre for Disease Preparedness, CSIRO, Geelong, Victoria, Australia
| | - Megan Dearnley
- Australian Centre for Disease Preparedness, CSIRO, Geelong, Victoria, Australia
| | - Cassandra T. David
- Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Diane Green
- Australian Centre for Disease Preparedness, CSIRO, Geelong, Victoria, Australia
| | - Stephen M. Rawlinson
- Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Gough G. Au
- Australian Centre for Disease Preparedness, CSIRO, Geelong, Victoria, Australia
| | - Glenn A. Marsh
- Australian Centre for Disease Preparedness, CSIRO, Geelong, Victoria, Australia
| | - Gregory W. Moseley
- Department of Microbiology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- * E-mail:
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Ou-Yang H, Wu SC, Sung LY, Yang SH, Yang SH, Chong KY, Chen CM. STAT3 Is an Upstream Regulator of Granzyme G in the Maternal-To-Zygotic Transition of Mouse Embryos. Int J Mol Sci 2021; 22:ijms22010460. [PMID: 33466434 PMCID: PMC7796490 DOI: 10.3390/ijms22010460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 12/19/2020] [Accepted: 12/31/2020] [Indexed: 12/24/2022] Open
Abstract
The maternal-to-zygotic transition (MZT), which controls maternal signaling to synthesize zygotic gene products, promotes the preimplantation development of mouse zygotes to the two-cell stage. Our previous study reported that mouse granzyme g (Gzmg), a serine-type protease, is required for the MZT. In this study, we further identified the maternal factors that regulate the Gzmg promoter activity in the zygote to the two-cell stage of mouse embryos. A full-length Gzmg promoter from mouse genomic DNA, FL-pGzmg (−1696~+28 nt), was cloned, and four deletion constructs of this Gzmg promoter, Δ1-pGzmg (−1369~+28 nt), Δ2-pGzmg (−939~+28 nt), Δ3-pGzmg (−711~+28 nt) and Δ4-pGzmg (−417~+28 nt), were subsequently generated. Different-sized Gzmg promoters were used to perform promoter assays of mouse zygotes and two-cell stage embryos. The results showed that Δ4-pGzmg promoted the highest expression level of the enhanced green fluorescent protein (EGFP) reporter in the zygotes and two-cell embryos. The data suggested that time-specific transcription factors upregulated Gzmg by binding cis-elements in the −417~+28-nt Gzmg promoter region. According to the results of the promoter assay, the transcription factor binding sites were predicted and analyzed with the JASPAR database, and two transcription factors, signal transducer and activator of transcription 3 (STAT3) and GA-binding protein alpha (GABPα), were identified. Furthermore, STAT3 and GABPα are expressed and located in zygote pronuclei and two-cell nuclei were confirmed by immunofluorescence staining; however, only STAT3 was recruited to the mouse zygote pronuclei and two-cell nuclei injected with the Δ4-pGzmg reporter construct. These data indicated that STAT3 is a maternal transcription factor and may upregulate Gzmg to promote the MZT. Furthermore, treatment with a STAT3 inhibitor, S3I-201, caused mouse embryonic arrest at the zygote and two-cell stages. These results suggest that STAT3, a maternal protein, is a critical transcription factor and regulates Gzmg transcription activity in preimplantation mouse embryos. It plays an important role in the maternal-to-zygotic transition during early embryonic development.
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Affiliation(s)
- Huan Ou-Yang
- Department of Life Sciences, and Ph.D. Program in Translational Medicine, National Chung Hsing University, Taichung 402, Taiwan; (H.O.-Y.); (S.-H.Y.)
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan;
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan;
| | - Shinn-Chih Wu
- Department of Animal Science and Technology, National Taiwan University, Taipei 106, Taiwan;
| | - Li-Ying Sung
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan;
| | - Shiao-Hsuan Yang
- Department of Life Sciences, and Ph.D. Program in Translational Medicine, National Chung Hsing University, Taichung 402, Taiwan; (H.O.-Y.); (S.-H.Y.)
- Reproductive Medicine Center, Department of Gynecology, Changhua Christian Hospital, Changhua 515, Taiwan
| | - Shang-Hsun Yang
- Department of Physiology, National Cheng Kung University, Tainan 70101, Taiwan;
- Institute of Basic Medical Sciences, National Cheng Kung University, Tainan 70101, Taiwan
| | - Kowit-Yu Chong
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan;
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan
| | - Chuan-Mu Chen
- Department of Life Sciences, and Ph.D. Program in Translational Medicine, National Chung Hsing University, Taichung 402, Taiwan; (H.O.-Y.); (S.-H.Y.)
- The iEGG and Animal Biotechnology Center, and Rong-Hsing Translational Medicine Research Center, National Chung Hsing University, Taichung 402, Taiwan
- Correspondence: ; Tel.: +886-4-22856309
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Yang J, Kunimoto H, Katayama B, Zhao H, Shiromizu T, Wang L, Ozawa T, Tomonaga T, Tsuruta D, Nakajima K. Phospho-Ser727 triggers a multistep inactivation of STAT3 by rapid dissociation of pY705-SH2 through C-terminal tail modulation. Int Immunol 2020; 32:73-88. [PMID: 31555812 PMCID: PMC10689346 DOI: 10.1093/intimm/dxz061] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 09/18/2019] [Indexed: 12/21/2022] Open
Abstract
Signal transducer and activator of transcription 3 (STAT3) is involved in many biological processes, including immunity and cancer. STAT3 becomes phosphorylated at Tyr705 and Ser727 on IL-6 stimulation. Phospho-Tyr705 (pY705) stabilizes the STAT3 dimer with reciprocal interactions between pY705 and the SH2 of the other molecule and phospho-Ser727 (pS727) accelerates pY705 dephosphorylation. We study how pS727 regulates STAT3 in both structural and biological perspectives. Using STAT3 reconstituted in HepG2-stat3-knockout cells, we show that pS727, together with a handshake N-terminal domain (NTD) interaction, causes rapid inactivation of STAT3 for pY705 dephosphorylation and a chromosome region maintenance 1 (CRM1)-independent nuclear export, which is critical for faithful STAT3 response to the cellular signals. The various N-terminal tags, GFP-related Ruby and FLAG, rendered the export CRM1-dependent and especially FLAG-tag caused nuclear accumulation of STAT3, indicating the presence of conformational changes in inactivation. Impaired reactivation of STAT3 by S727A or FLAG-tag delayed or inhibited the IL-6-induced saa1 mRNA expression, respectively. The detailed analysis of the pY705-SH2 structure identified the C-terminal tail (CTT) from L706 to P715 as a key regulator of the CTT-CTT intermolecular and the CTT-SH2 intramolecular interactions that support pY705-SH2 association. The functional studies using multiple STAT3 mutants indicated that the degree of the two interactions determines the stability of pY705-SH2 interaction. Importantly, Pro715 was critical for the pS727's destabilizing activity and the known phosphorylation and acetylation at the CTT structurally inhibited the pY705-SH2 interaction. Thus, pS727 triggers pY705-SH2 dissociation by weakening the supportive interactions likely through CTT modulation, inducing rapid cycles of STAT3 activation-inactivation for proper function of STAT3.
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Affiliation(s)
- Junhao Yang
- Department of Immunology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hiroyuki Kunimoto
- Department of Immunology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Bumpei Katayama
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hong Zhao
- Department of Immunology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Takashi Shiromizu
- Laboratory of Proteome Research, National Institute of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka, Japan
| | - Lingyu Wang
- Department of Immunology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Toshiyuki Ozawa
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Takeshi Tomonaga
- Laboratory of Proteome Research, National Institute of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka, Japan
| | - Daisuke Tsuruta
- Department of Dermatology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Koichi Nakajima
- Department of Immunology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Ernst S, Müller-Newen G. Nucleocytoplasmic Shuttling of STATs. A Target for Intervention? Cancers (Basel) 2019; 11:cancers11111815. [PMID: 31752278 PMCID: PMC6895884 DOI: 10.3390/cancers11111815] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/08/2019] [Accepted: 11/13/2019] [Indexed: 12/12/2022] Open
Abstract
Signal transducer and activator of transcription (STAT) proteins are transcription factors that in the latent state are located predominantly in the cytoplasm. Activation of STATs through phosphorylation of a single tyrosine residue results in nuclear translocation. The requirement of tyrosine phosphorylation for nuclear accumulation is shared by all STAT family members but mechanisms of nuclear translocation vary between different STATs. These differences offer opportunities for specific intervention. To achieve this, the molecular mechanisms of nucleocytoplasmic shuttling of STATs need to be understood in more detail. In this review we will give an overview on the various aspects of nucleocytoplasmic shuttling of latent and activated STATs with a special focus on STAT3 and STAT5. Potential targets for cancer treatment will be identified and discussed.
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Affiliation(s)
- Sabrina Ernst
- Institute of Biochemistry and Molecular Biology, RWTH Aachen University, 52074 Aachen, Germany;
- Confocal Microscopy Facility, Interdisciplinary Center for Clinical Research IZKF, RWTH Aachen University, 52074 Aachen, Germany
| | - Gerhard Müller-Newen
- Institute of Biochemistry and Molecular Biology, RWTH Aachen University, 52074 Aachen, Germany;
- Correspondence:
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Chen X, Han K, Lin G, Liu C, Wang S, Shi X, Hu Z, Wu C, Xu X, Hu C. Ctenopharyngodon Idella STAT3 alleviates autophagy by up-regulating BCL-2 expression. FISH & SHELLFISH IMMUNOLOGY 2019; 91:194-201. [PMID: 31108175 DOI: 10.1016/j.fsi.2019.05.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/14/2019] [Accepted: 05/17/2019] [Indexed: 06/09/2023]
Abstract
In mammals, STAT3 (Signal transducer and activator of transcription 3) plays an absolutely vital role in response to cytokines and growth factors. In mammals, IL-6/JAK/STAT3 pathway is closely linked to immune response and promotes cell proliferation, survival and metastasis. Some recent studies have already demonstrated that STAT3 regulates autophagy. As a downstream target gene of STAT3, Bcl-2 (B-cell lymphoma 2) not only participates in regulating apoptosis, but also responds to autophagy. STAT3 regulates autophagy through Bcl-2. In general, the generation of autophagy is always accompanied by the change of apoptosis, and the occurrence of apoptosis is often accompanied by the decreased of cell viability. In grass carp (Ctenopharyngodon idella), LPS-induced autophagy is involved in the release of pro-inflammatory cytokines. However, only the relationship between autophagy and cytokines was illustrated, in which the signaling pathways were not discussed. In the present study, we found that the autophagy inducer, Tunicamycin (Tm), can induce C.Idella Kidney cells (CIK) autophagy. When the cells were incubated with the recombinant human IL-6 (rIL-6) for a short period of times, the mRNA expression level of C.Idella IL-6R and STAT3 were increased. At the same time, the number of GFP-LC3 puncta and the ratio of LC3-II/LC3-I were both decreased obviously in cells. It indicated that the rIL-6 can significantly alleviate autophagy induced by Tm. We speculated that CiSTAT3 may play a key role in the process. To confirm this hypothesis, we performed a rIL-6 activating CiSTAT3 assay. The result demonstrated that rIL-6 can induce CiSTAT3 to form homologous dimmer. The activated CiSTAT3 regulated the transcription activity of CiBcl-2, finally led to a decrease of autophagy. In addition, when cells were in the state of autophagy, apoptosis was increased and cell viability was decreased. When CiSTAT3 was activated, cell apoptosis weakened and cell viability was increased. The results suggest that CiSTAT3 plays an important role in maintaining the normal physiological process of cells.
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Affiliation(s)
- Xingxing Chen
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Kun Han
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Gang Lin
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Changxin Liu
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Shanghong Wang
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Xiao Shi
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Zhizhen Hu
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Chuxin Wu
- Yuzhang Normal University, Nanchang, 330103, China
| | - Xiaowen Xu
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Chengyu Hu
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang, 330031, China.
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Cui H, Han W, Zhang J, Zhang Z, Su X. Advances in the Regulatory Effects of Bioactive Peptides on Metabolic Signaling Pathways in Tumor Cells. J Cancer 2019; 10:2425-2433. [PMID: 31258747 PMCID: PMC6584345 DOI: 10.7150/jca.31359] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 04/07/2019] [Indexed: 12/12/2022] Open
Abstract
Changes in cell metabolism are an important feature of tumors that has always been an intense topic of study, particularly in regard to whether metabolic disorders are a cause or an effect of tumorigenesis. Studies have shown that the processes underlying metabolic changes in tumors involve the activation of protooncogenes and the inactivation of cancer suppressor genes, as well as changes in metabolic flux in cells due to the abnormal activation of signaling pathways that modulate metabolic enzymes and/or metabolic regulatory proteins at several levels, including transfer and posttranslational modification. Thus, the repair of abnormal metabolic pathways via intervention in the relevant tumor metabolic pathways that impact specific targets has become a new method of cancer prevention and treatment. Bioactive peptides, which have many biological functions, could specifically target malignant tumors. Their interaction with signal transduction molecules involved in the development and transference of tumors could regulate the relevant cell metabolic pathways and inhibit the development of tumors and/or accelerate apoptosis in tumor cells. In this review, several aspects of tumor suppression using bioactive peptides will be discussed and summarized, including the regulation of the PI3K/AKT/mTOR, AMPK, and STST3 signaling pathways, the modulation of the TRAIL death receptor signaling pathway, the regulation of aerobic glycolysis by PKM2, and the modulation of the NF-кB signaling pathway, to aid in the search for better and more specific antineoplastic drugs in the form of bioactive peptides.
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Affiliation(s)
- Hongwei Cui
- Clinical Medical Research Center of the Affiliated Hospital, Inner Mongolia Medical University, Hohhot, 010050, Inner Mongolia, P.R. China
| | - Wenyan Han
- Clinical Medical Research Center of the Affiliated Hospital, Inner Mongolia Medical University, Hohhot, 010050, Inner Mongolia, P.R. China
| | - Junyao Zhang
- Clinical Medical Research Center of the Affiliated Hospital, Inner Mongolia Medical University, Hohhot, 010050, Inner Mongolia, P.R. China
| | - Zhihui Zhang
- Clinical Medical Research Center of the Affiliated Hospital, Inner Mongolia Medical University, Hohhot, 010050, Inner Mongolia, P.R. China
| | - Xiulan Su
- Clinical Medical Research Center of the Affiliated Hospital, Inner Mongolia Medical University, Hohhot, 010050, Inner Mongolia, P.R. China
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Wang L, Wu Z, Huang Q, Huang K, Qi G, Wu C, Mao H, Xu X, Wang H, Hu C. Grass carp (Ctenopharyngodon idella) STAT3 regulates the eIF2α phosphorylation through interaction with PKR. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2018; 78:26-34. [PMID: 28916266 DOI: 10.1016/j.dci.2017.08.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 08/25/2017] [Accepted: 08/27/2017] [Indexed: 06/07/2023]
Abstract
In mammals, STAT3 (Signal transducer and activator of transcription 3) plays an important role in growth, multiplication, differentiation and participates in inflammation, tumorigenesis, metabolic disorders and immune response. STAT3 is a protein that shuttles between the nucleus and cytoplasm. Compared to the STAT3 in cell nucleus, we did not know the function of STAT3 in cytoplasm for a long time. Some recent studies have shown that cytoplasmic STAT3 regulates autophagy through the interaction with the double-stranded RNA-activated protein kinase (PKR), which plays an important role in cellular antiviral response. Fish is a good target for developmental and comparative immunology. In the present study, we found that the expression of grass carp (Ctenopharyngodon idella) STAT3 (CiSTAT3) was ubiquitous and significantly up-regulated under the stimulation of poly I:C. To explore the potential function of fish cytoplasmic STAT3 in the antiviral signaling pathways, in this paper we analyzed the relationship between cytoplasmic CiSTAT3 and CiPKR. We demonstrated that the CiSTAT3 can combine with CiPKR in vivo and in vitro. The SH2 domain of CiSTAT3 and the C-terminus of CiPKR play an important role in this process. Moreover, the dimer of CiSTAT3 and CiPKR was formed under normal circumstances, however, it was dissociated under the induction of poly I:C. So, we guessed the binding of CiSTAT3 and CiPKR may regulate cell viability. It has also been shown that overexpression of CiSTAT3 in CIK cells can significantly reduce the level of p-eIF2α. On the contrary, the siRNA-mediated knockdown of CiSTAT3 and Stattic induction in CIK cells can up-regulate the p-eIF2α level. To further understand the relationship between CiSTAT3 and p-eIF2α level, we carried out the CiPKR-knockdown experiment. The result indicated that CiSTAT3 regulated the level of p-eIF2α through binding to CiPKR. In addition, overexpression of CiSTAT3 in CIK cells was able to improve the cell viability. These results above unraveled the molecular mechanism of fish cytoplasmic STAT3 regulating the eIF2α phosphorylation and cell viability. Therefore, the function of fish cytoplasmic STAT3 is similar to those of mammals.
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Affiliation(s)
- Liqiang Wang
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China
| | - Zhen Wu
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China
| | - Qingli Huang
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China
| | - Keyi Huang
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China
| | - Guoqin Qi
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China
| | - Chuxin Wu
- Yuzhang Normal University, Nanchang 330031, China
| | - Huiling Mao
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China
| | - Xiaowen Xu
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China
| | - Haizhou Wang
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China
| | - Chengyu Hu
- College of Life Science, Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University) Ministry of Education, Nanchang 330031, China.
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Martincuks A, Andryka K, Küster A, Schmitz-Van de Leur H, Komorowski M, Müller-Newen G. Nuclear translocation of STAT3 and NF-κB are independent of each other but NF-κB supports expression and activation of STAT3. Cell Signal 2017; 32:36-47. [PMID: 28089769 DOI: 10.1016/j.cellsig.2017.01.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 12/31/2016] [Accepted: 01/04/2017] [Indexed: 12/11/2022]
Abstract
NF-κB and STAT3 are essential transcription factors in immunity and act at the interface of the transition from chronic inflammation to cancer. Different functional crosstalks between NF-κB and STAT3 have been recently described arguing for a direct interaction of both proteins. During a systematic analysis of NF-κB/STAT3 crosstalk we observed that appearance of the subcellular distribution of NF-κB and STAT3 in immunofluorescence heavily depends on the fixation procedure. Therefore, we established an optimized fixation protocol for the reliable simultaneous analysis of the subcellular distributions of both transcription factors. Using this protocol we found that cytokine-induced nuclear accumulation of NF-κB or STAT3 did not alter the subcellular distribution of the other transcription factor. Both knockout and overexpression of STAT3 does not have any major effect on canonical TNFα-NF-κB signalling in MEF or HeLa cells. Similarly, knockout of p65 did not alter nuclear accumulation of STAT3 in response to IL-6. However, p65 expression correlates with elevated total cellular levels of STAT3 and STAT1 and supports activation of these transcription factors. Our findings in MEF cells argue against a direct physical interaction of free cellular NF-κB and STAT3 but point to more intricate functional interactions.
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Affiliation(s)
- Antons Martincuks
- Institute of Biochemistry and Molecular Biology, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Katarzyna Andryka
- Systems Biology of Biochemical Signalling, Laboratory of Modelling in Biology and Medicine, Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b, 02-106 Warszawa, Poland
| | - Andrea Küster
- Institute of Biochemistry and Molecular Biology, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | | | - Michal Komorowski
- Systems Biology of Biochemical Signalling, Laboratory of Modelling in Biology and Medicine, Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b, 02-106 Warszawa, Poland
| | - Gerhard Müller-Newen
- Institute of Biochemistry and Molecular Biology, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany.
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