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Dotta L, Todaro F, Baronio M, Giacomelli M, Pinelli M, Giambarda M, Brognoli B, Greco S, Rota F, Cortesi M, Soresina A, Moratto D, Tomasi C, Ferraro RM, Giliani S, Badolato R. Patients with STAT1 Gain-of-function Mutations Display Increased Apoptosis which is Reversed by the JAK Inhibitor Ruxolitinib. J Clin Immunol 2024; 44:85. [PMID: 38578354 PMCID: PMC10997685 DOI: 10.1007/s10875-024-01684-y] [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: 01/08/2024] [Accepted: 03/04/2024] [Indexed: 04/06/2024]
Abstract
INTRODUCTION The signal transducer and activator of transcription (STAT1) gain-of-function (GOF) syndrome accounts for most cases of chronic mucocutaneous candidiasis but is characterized by a broader clinical phenotype that may include bacterial, viral, or invasive fungal infections, autoimmunity, autoinflammatory manifestations, vascular complications, or malignancies. The severity of lymphopenia may vary and influence the infectious morbidity. METHODS In our cohort of seven STAT1-GOF patients, we investigated the mechanisms that may determine T lymphopenia, we characterized the interferon gene signature (IGS) and analyzed the effect of ruxolitinib in reverting the immune dysregulation. RESULTS STAT1-GOF patients exhibited increased T lymphocyte apoptosis that was significantly augmented in both resting conditions and following stimulation with mitogens and IFNα, as evaluated by flow cytometry by Annexin V/ Propidium iodide assay. The JAK inhibitor ruxolitinib significantly reduced the IFNα-induced hyperphosphorylation of STAT1 and reverted the stimulation-induced T-cell apoptosis, in vitro. In two adult STAT1-GOF patients, the JAKinib treatment ameliorated chronic mucocutaneous candidiasis and lymphopenia. Most STAT1-GOF patients, particularly those who had autoimmunity, presented increased IGS that significantly decreased in the two patients during ruxolitinib treatment. CONCLUSION In STAT1-GOF patients, T lymphocyte apoptosis is increased, and T lymphopenia may determine higher risk of severe infections. The JAKinib target therapy should be evaluated to treat severe chronic candidiasis and lymphopenia, and to downregulate the IFNs in patients with autoinflammatory or autoimmune manifestations.
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Affiliation(s)
- Laura Dotta
- Department of Clinical and Experimental Sciences, Department of Pediatrics, University of Brescia, ASST Spedali Civili of Brescia, Brescia, Italy.
| | - Francesca Todaro
- Angelo Nocivelli Institute for Molecular Medicine, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Manuela Baronio
- Department of Clinical and Experimental Sciencies, University of Brescia, Brescia, Italy
| | - Mauro Giacomelli
- Angelo Nocivelli Institute for Molecular Medicine, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Marinella Pinelli
- Angelo Nocivelli Institute for Molecular Medicine, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Martina Giambarda
- Department of Pediatrics, ASST Spedali Civili of Brescia and University of Brescia, Brescia, Italy
| | - Beatrice Brognoli
- Department of Pediatrics, ASST Spedali Civili of Brescia and University of Brescia, Brescia, Italy
| | - Silvia Greco
- Department of Pediatrics, ASST Spedali Civili of Brescia and University of Brescia, Brescia, Italy
| | - Francesca Rota
- Department of Pediatrics, ASST Spedali Civili of Brescia and University of Brescia, Brescia, Italy
| | - Manuela Cortesi
- Department of Pediatrics, ASST Spedali Civili of Brescia and University of Brescia, Brescia, Italy
| | - Annarosa Soresina
- Department of Pediatrics, ASST Spedali Civili of Brescia and University of Brescia, Brescia, Italy
| | - Daniele Moratto
- Angelo Nocivelli Institute for Molecular Medicine, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Cesare Tomasi
- Department of Clinical and Experimental Sciences, Department of Pediatrics, University of Brescia, ASST Spedali Civili of Brescia, Brescia, Italy
| | - Rosalba Monica Ferraro
- Angelo Nocivelli Institute for Molecular Medicine, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Silvia Giliani
- Angelo Nocivelli Institute for Molecular Medicine, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Raffaele Badolato
- Department of Clinical and Experimental Sciences, Department of Pediatrics, University of Brescia, ASST Spedali Civili of Brescia, Brescia, Italy
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Duan K, Liu J, Zhang J, Chu T, Liu H, Lou F, Liu Z, Gao B, Wei S, Wei F. Advancements in innate immune regulation strategies in islet transplantation. Front Immunol 2024; 14:1341314. [PMID: 38288129 PMCID: PMC10823010 DOI: 10.3389/fimmu.2023.1341314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 12/28/2023] [Indexed: 01/31/2024] Open
Abstract
As a newly emerging organ transplantation technique, islet transplantation has shown the advantages of minimal trauma and high safety since it was first carried out. The proposal of the Edmonton protocol, which has been widely applied, was a breakthrough in this method. However, direct contact between islets and portal vein blood will cause a robust innate immune response leading to massive apoptosis of the graft, and macrophages play an essential role in the innate immune response. Therefore, therapeutic strategies targeting macrophages in the innate immune response have become a popular research topic in recent years. This paper will summarize and analyze recent research on strategies for regulating innate immunity, primarily focusing on macrophages, in the field of islet transplantation, including drug therapy, optimization of islet preparation process, islet engineering and Mesenchymal stem cells cotransplantation. We also expounded the heterogeneity, plasticity and activation mechanism of macrophages in islet transplantation, providing a theoretical basis for further research.
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Affiliation(s)
- Kehang Duan
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Jiao Liu
- Department of Cardiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Jian Zhang
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Tongjia Chu
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Huan Liu
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Fengxiang Lou
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Ziyu Liu
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Bing Gao
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Shixiong Wei
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Feng Wei
- Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
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Cai T, Chen S, Wu C, Lou C, Wang W, Lin C, Jiang H, Xu X. Erythropoietin suppresses osteoblast apoptosis and ameliorates steroid-induced necrosis of the femoral head in rats by inhibition of STAT1-caspase 3 signaling pathway. BMC Musculoskelet Disord 2023; 24:894. [PMID: 37978375 PMCID: PMC10655348 DOI: 10.1186/s12891-023-07028-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 11/08/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND Steroid-induced avascular necrosis of the femoral head (SANFH) is characterized by osteoblast apoptosis, leading to a loss of bone structure and impaired hip joint function. It has been demonstrated that erythropoietin (EPO) performs a number of biological roles. OBJECTIVE We examined the effects of EPO on SANFH and its regulation of the STAT1-caspase 3 signaling pathway. METHOD In vitro, osteoblasts were treated with dexamethasone (Dex) or EPO. We identified the cytotoxicity of EPO by CCK-8, the protein expression of P-STAT1, cleaved-caspase9, cleaved-caspase3, Bcl-2, BAX, and cytochrome c by Western blotting, and evaluated the apoptosis of osteoblasts by flow cytometry. In vivo, we analyzed the protective effect of EPO against SANFH by hematoxylin and eosin (H&E), Immunohistochemical staining, and Micro-computed tomography (CT). RESULTS In vitro, EPO had no apparent toxic effect on osteoblasts. In Dex-stimulated cells, EPO therapy lowered the protein expression of BAX, cytochrome c, p-STAT1, cleaved-caspase9, and cleaved-caspase3 while increasing the expression of Bcl-2. EPO can alleviate the apoptosis induced by Dex. In vivo, EPO can lower the percentage of empty bone lacunae in SANFH rats. CONCLUSION The present study shows that EPO conferred beneficial effects in rats with SANFH by inhibiting STAT1-caspase 3 signaling, suggesting that EPO may be developed as a treatment for SANFH.
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Affiliation(s)
- Tingwen Cai
- Department of Orthopedics, The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China
- Key Laboratory of Orthopedics of Zhejiang Province, Wenzhou, Zhejiang Province, China
- The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Siyuan Chen
- Department of Orthopedics, The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China
- Key Laboratory of Orthopedics of Zhejiang Province, Wenzhou, Zhejiang Province, China
- The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Chenghu Wu
- School of Biomedical Engineering, School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Chao Lou
- Department of Orthopedics, The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China
- Key Laboratory of Orthopedics of Zhejiang Province, Wenzhou, Zhejiang Province, China
- The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Weidan Wang
- Department of Orthopedics, The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China
- Key Laboratory of Orthopedics of Zhejiang Province, Wenzhou, Zhejiang Province, China
- The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Chihao Lin
- Department of Orthopedics, The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China
- Key Laboratory of Orthopedics of Zhejiang Province, Wenzhou, Zhejiang Province, China
- The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Hongyi Jiang
- Department of Orthopedics, The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China
- Key Laboratory of Orthopedics of Zhejiang Province, Wenzhou, Zhejiang Province, China
- The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Xinxian Xu
- Department of Orthopedics, The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China.
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Song X, Wang M, Liu S, Liu H, Jiang A, Zou Y, Deng Y, Qin Q, Song Y, Zheng Y. A sequential scheme including PTT and 2'3'-cGAMP/CQ-LP reveals the antitumor immune function of PTT through the type I interferon pathway. Pharmacol Res 2023; 196:106939. [PMID: 37758101 DOI: 10.1016/j.phrs.2023.106939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 09/22/2023] [Accepted: 09/22/2023] [Indexed: 09/30/2023]
Abstract
Photothermal therapy (PTT) is a promising antitumor treatment that is easy to implement, minimally invasive, and precisely controllable, and evokes strong antitumor immunity. We believe that a thorough elucidation of its underlying antitumor immune mechanisms would contribute to the rational design of combination treatments with other antitumor strategies and consequently potentiate clinical use. In this study, PTT using indocyanine green (ICG) induced STING-dependent type I interferon (IFN) production in macrophages (RAW264.7 and bone marrow-derived macrophages (BMDMs)), as proven by the use of a STING inhibitor (C178), and triggered STING-independent type I IFN generation in tumor cells (CT26 and 4T1), which was inhibited by DNase pretreatment. A novel liposome coloaded with the STING agonist 2'3'-cGAMP (cGAMP) and chloroquine (CQ) was constructed to achieve synergistic effect with PTT, in which CQ increased cGAMP entrapment efficiency and prevented STING degradation after IFN signaling activation. The sequential combination treatment caused a significant increase in tumor cell apoptosis, probably due to interferon stimulating gene products 15 and 54 (ISG15 and ISG 54), and achieved a more striking antitumor inhibition effect in the CT26 tumor model than the 4T1 model, likely due to higher STAT1 expression and consequently more intense IFN signal transduction. In the tumor microenvironment, the combination treatment increased infiltrating CD8+T cells (4-fold) and M1-like TAMs (10-fold), and decreased M-MDSCs (over 2-fold) and M2-like TAMs (over 4-fold). Above all, in-depth exploration of the antitumor mechanism of PTT provides guidance for selecting sensitive tumor models and designing reasonable clinical schemes.
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Affiliation(s)
- Xiaoshuang Song
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Mao Wang
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Simeng Liu
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Huimin Liu
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Ailing Jiang
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yu Zou
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yuchuan Deng
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qin Qin
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yiran Song
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yu Zheng
- Department of Biotherapy,Cancer Center and State Key Laboratory of Biotherapy,West China Hospital, Sichuan University, Chengdu 610041, China.
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5
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Han W, Pu H, Li S, Liu Y, Zhao Y, Xu M, Chen C, Wu Y, Yang T, Ye Q, Wang H, Stetler RA, Chen J, Shi Y. Targeted ablation of signal transducer and activator of transduction 1 alleviates inflammation by microglia/macrophages and promotes long-term recovery after ischemic stroke. J Neuroinflammation 2023; 20:178. [PMID: 37516843 PMCID: PMC10385956 DOI: 10.1186/s12974-023-02860-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 07/25/2023] [Indexed: 07/31/2023] Open
Abstract
BACKGROUND Brain microglia and macrophages (Mi/MΦ) can shift to a harmful or advantageous phenotype following an ischemic stroke. Identification of key molecules that regulate the transformation of resting Mi/MΦ could aid in the development of innovative therapies for ischemic stroke. The transcription factor signal transducer and activator of transduction 1 (STAT1) has been found to contribute to acute neuronal death (in the first 24 h) following ischemic stroke, but its effects on Mi/MΦ and influence on long-term stroke outcomes have yet to be determined. METHODS We generated mice with tamoxifen-induced, Mi/MΦ-specific knockout (mKO) of STAT1 driven by Cx3cr1CreER. Expression of STAT1 was examined in the brain by flow cytometry and RNA sequencing after ischemic stroke induced by transient middle cerebral artery occlusion (MCAO). The impact of STAT1 mKO on neuronal cell death, Mi/MΦ phenotype, and brain inflammation profiles were examined 3-5 days after MCAO. Neurological deficits and the integrity of gray and white matter were assessed for 5 weeks after MCAO by various neurobehavioral tests and immunohistochemistry. RESULTS STAT1 was activated in Mi/MΦ at the subacute stage (3 days) after MCAO. Selective deletion of STAT1 in Mi/MΦ did not alter neuronal cell death or infarct size at 24 h after MCAO, but attenuated Mi/MΦ release of high mobility group box 1 and increased arginase 1-producing Mi/MΦ 3d after MCAO, suggesting boosted inflammation-resolving responses of Mi/MΦ. As a result, STAT1 mKO mice had mitigated brain inflammation at the subacute stage after MCAO and less white matter injury in the long term. Importantly, STAT1 mKO was sufficient to improve functional recovery for at least 5 weeks after MCAO in both male and female mice. CONCLUSIONS Mi/MΦ-targeted STAT1 KO does not provide immediate neuroprotection but augments inflammation-resolving actions of Mi/MΦ, thereby facilitating long-term functional recovery after stroke. STAT1 is, therefore, a promising therapeutic target to harness beneficial Mi/MΦ responses and improve long-term outcomes after ischemic stroke.
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Affiliation(s)
- Wenxuan Han
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Hongjian Pu
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Sicheng Li
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Yaan Liu
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Yongfang Zhao
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Mingyue Xu
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Caixia Chen
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Yun Wu
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Tuo Yang
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Qing Ye
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
| | - Hong Wang
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - R Anne Stetler
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15261, USA
| | - Jun Chen
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15261, USA
| | - Yejie Shi
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, University of Pittsburgh, 3500 Terrace Street, S-510 BST, Pittsburgh, PA, 15213, USA.
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15261, USA.
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Tanaka S, Orita H, Kataoka T, Miyazaki M, Saeki H, Wada R, Brock MV, Fukunaga T, Amano T, Shiroishi T. Gasdermin D represses inflammation-induced colon cancer development by regulating apoptosis. Carcinogenesis 2023; 44:341-349. [PMID: 36753047 DOI: 10.1093/carcin/bgad005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 12/07/2022] [Accepted: 02/06/2023] [Indexed: 02/09/2023] Open
Abstract
Chronic inflammation is widely recognized as a major risk factor for cancer formation, but the underlying mechanisms are poorly understood. Recently, it was shown that Gasdermin D (GSDMD) protein drives pyroptotic cell death in macrophages on cleavage by inflammatory caspases. Even though the Gsdmd gene is specifically expressed in the intestinal epithelium, the role of Gsdmd in the intestinal tissues remains poorly characterized. In this study, we examined the biological role of Gsdmd in colorectal cancer (CRC) development, employing an azoxymethane/dextran sulfate sodium carcinogenesis model. Results show that GSDMD deficiency enhances CRC development, probably due to decreased apoptosis caused by downregulation of interferon-gamma (IFNγ)-signal transducer and activator 1 (STAT1) signaling. Furthermore, we show that GSDMD protein is diminished in human colorectal cancer, indicating involvement of GSDMD in repression of CRC development in humans. Our findings provide a new insight into functions of Gsdmd/GSDMD in colonic inflammation and human CRC development.
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Affiliation(s)
- Shigekazu Tanaka
- Mammalian Genetics Laboratory, Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
| | - Hajime Orita
- Shizuoka Medical Research Center for Disaster, Juntendo University, Shizuoka Hospital, 1129 Nagaoka, Izunokuni, Shizuoka 410-2295, Japan
- Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo Bunkyo Ward, Tokyo 113-8421, Japan
| | - Taro Kataoka
- Shizuoka Medical Research Center for Disaster, Juntendo University, Shizuoka Hospital, 1129 Nagaoka, Izunokuni, Shizuoka 410-2295, Japan
| | - Masahiro Miyazaki
- Shizuoka Medical Research Center for Disaster, Juntendo University, Shizuoka Hospital, 1129 Nagaoka, Izunokuni, Shizuoka 410-2295, Japan
| | - Harumi Saeki
- Department of Pathology, Juntendo University School of Medicine, 2-1-1 Hongo Bunkyo Ward, Tokyo 113-8421, Japan
| | - Ryo Wada
- Department of Pathology, Juntendo University Shizuoka Hospital, 1129 Nagaoka, Izunokuni, Shizuoka 410-2295, Japan
| | - Malcolm V Brock
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Tetsu Fukunaga
- Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo Bunkyo Ward, Tokyo 113-8421, Japan
| | - Takanori Amano
- Mammalian Genetics Laboratory, Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- Next Generation Human Disease Model Team, RIKEN BioResource Research Center, Tsukuba 305-0074, Japan
| | - Toshihiko Shiroishi
- Mammalian Genetics Laboratory, Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- RIKEN BioResource Research Center, Tsukuba 305-0074, Japan
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Kavousi N, Tonge DP, Mourtada-Maarabouni M. New insights into the functional role of protein phosphatase 4 regulatory subunit PP4R3A/SMEK1 in the regulation of leukemic cell fate. Int J Biol Macromol 2023; 233:123467. [PMID: 36731689 DOI: 10.1016/j.ijbiomac.2023.123467] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/08/2023] [Accepted: 01/25/2023] [Indexed: 02/01/2023]
Abstract
The serine/threonine protein phosphatase 4 holoenzyme consists of a PP4 catalytic subunit (PP4c), which interacts with four different regulatory subunits. Previous studies have shown that PP4c acts as a tumour suppressor. Emerging evidence suggests that the protein phosphatase 4 regulatory subunits might regulate cell fate independently of PP4c. To this end, we investigated the role of PP4R3A (SMEK1) in Jurkat and CEM-C7 leukemic cell lines. SMEK1 overexpression decreased cell growth, increased spontaneous apoptosis, and reduced the colony forming ability of leukemic cells. Conversely, siRNA-mediated silencing of SMEK1 led to increased short and long-term survival in these cells. Phospho-protein arrays revealed that increased expression of SMEK1 affected the phosphorylation of key proteins involved in MAPK3, AKT, JAK/STAT, NFκB and TGFβ signalling pathways. These proteins include transcription factors such as NFκB, STAT3, c-JUN, SMAD1, and SMAD5, suggesting a role for SMEK1 in the regulation of gene expression. RNA sequencing confirmed the role of SMEK1 in the regulation of gene expression. RNA sequencing also confirmed the tumour suppressor role of SMEK1. Taken together, this study shows that SMEK1 regulates leukemic T cell survival, indicating that SMEK1 dysfunction may be important in the development and progression of leukemia.
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Affiliation(s)
- Nadieh Kavousi
- School of Life Sciences, Faculty of Natural Sciences, Keele University, Newcastle-under-Lyme ST5 5BG, UK
| | - Daniel P Tonge
- School of Life Sciences, Faculty of Natural Sciences, Keele University, Newcastle-under-Lyme ST5 5BG, UK
| | - Mirna Mourtada-Maarabouni
- School of Life Sciences, Faculty of Natural Sciences, Keele University, Newcastle-under-Lyme ST5 5BG, UK.
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Lindblom J, Toro-Domínguez D, Carnero-Montoro E, Beretta L, Borghi MO, Castillo J, Enman Y, Mohan C, Alarcón-Riquelme ME, Barturen G, Parodis I. Distinct gene dysregulation patterns herald precision medicine potentiality in systemic lupus erythematosus. J Autoimmun 2023; 136:103025. [PMID: 36996699 DOI: 10.1016/j.jaut.2023.103025] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/07/2023] [Accepted: 03/03/2023] [Indexed: 03/30/2023]
Abstract
OBJECTIVES We aimed at investigating the whole-blood transcriptome, expression quantitative trait loci (eQTLs), and levels of selected serological markers in patients with SLE versus healthy controls (HC) to gain insight into pathogenesis and identify drug targets. METHODS We analyzed differentially expressed genes (DEGs) and dysregulated gene modules in a cohort of 350 SLE patients and 497 HC from the European PRECISESADS project (NTC02890121), split into a discovery (60%) and a replication (40%) set. Replicated DEGs qualified for eQTL, pathway enrichment, regulatory network, and druggability analysis. For validation purposes, a separate gene module analysis was performed in an independent cohort (GSE88887). RESULTS Analysis of 521 replicated DEGs identified multiple enriched interferon signaling pathways through Reactome. Gene module analysis yielded 18 replicated gene modules in SLE patients, including 11 gene modules that were validated in GSE88887. Three distinct gene module clusters were defined i.e., "interferon/plasma cells", "inflammation", and "lymphocyte signaling". Predominant downregulation of the lymphocyte signaling cluster denoted renal activity. By contrast, upregulation of interferon-related genes indicated hematological activity and vasculitis. Druggability analysis revealed several potential drugs interfering with dysregulated genes within the "interferon" and "PLK1 signaling events" modules. STAT1 was identified as the chief regulator in the most enriched signaling molecule network. Drugs annotated to 15 DEGs associated with cis-eQTLs included bortezomib for its ability to modulate CTSL activity. Belimumab was annotated to TNFSF13B (BAFF) and daratumumab was annotated to CD38 among the remaining replicated DEGs. CONCLUSIONS Modulation of interferon, STAT1, PLK1, B and plasma cell signatures showed promise as viable approaches to treat SLE, pointing to their importance in SLE pathogenesis.
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Ben Hamouda S, Essafi-Benkhadir K. Interplay between Signaling Pathways and Tumor Microenvironment Components: A Paradoxical Role in Colorectal Cancer. Int J Mol Sci 2023; 24:ijms24065600. [PMID: 36982677 PMCID: PMC10057671 DOI: 10.3390/ijms24065600] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/17/2023] Open
Abstract
The study of the tumor microenvironment (TME) has become an important part of colorectal cancer (CRC) research. Indeed, it is now accepted that the invasive character of a primary CRC is determined not only by the genotype of the tumor cells, but also by their interactions with the extracellular environment, which thereby orchestrates the development of the tumor. In fact, the TME cells are a double-edged sword as they play both pro- and anti-tumor roles. The interaction of the tumor-infiltrating cells (TIC) with the cancer cells induces the polarization of the TIC, exhibiting an antagonist phenotype. This polarization is controlled by a plethora of interconnected pro- and anti-oncogenic signaling pathways. The complexity of this interaction and the dual function of these different actors contribute to the failure of CRC control. Thus, a better understanding of such mechanisms is of great interest and provides new opportunities for the development of personalized and efficient therapies for CRC. In this review, we summarize the signaling pathways linked to CRC and their implication in the development or inhibition of the tumor initiation and progression. In the second part, we enlist the major components of the TME and discuss the complexity of their cells functions.
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10
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EGFR and p38MAPK Contribute to the Apoptotic Effect of the Recombinant Lectin from Tepary Bean (Phaseolus acutifolius) in Colon Cancer Cells. Pharmaceuticals (Basel) 2023. [DOI: 10.3390/ph16020290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Previous works showed that a Tepary bean lectin fraction (TBLF) induced apoptosis on colon cancer cells and inhibited early colonic tumorigenesis. One Tepary bean (TB) lectin was expressed in Pichia pastoris (rTBL-1), exhibiting similarities to one native lectin, where its molecular structure and in silico recognition of cancer-type N-glycoconjugates were confirmed. This work aimed to determine whether rTBL-1 retained its bioactive properties and if its apoptotic effect was related to EGFR pathways by studying its cytotoxic effect on colon cancer cells. Similar apoptotic effects of rTBL-1 with respect to TBLF were observed for cleaved PARP-1 and caspase 3, and cell cycle G0/G1 arrest and decreased S phase were observed for both treatments. Apoptosis induction on SW-480 cells was confirmed by testing HA2X, p53 phosphorylation, nuclear fragmentation, and apoptotic bodies. rTBL-1 increased EGFR phosphorylation but also its degradation by the lysosomal route. Phospho-p38 increased in a concentration- and time-dependent manner, matching apoptotic markers, and STAT1 showed activation after rTBL-1 treatment. The results show that part of the rTBL-1 mechanism of action is related to p38 MAPK signaling. Future work will focus further on the target molecules of this recombinant lectin against colon cancer.
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11
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Jain NK, Tailang M, Jain HK, Chandrasekaran B, Sahoo BM, Subramanian A, Thangavel N, Aldahish A, Chidambaram K, Alagusundaram M, Kumar S, Selvam P. Therapeutic implications of current Janus kinase inhibitors as anti-COVID agents: A review. Front Pharmacol 2023; 14:1135145. [PMID: 37021053 PMCID: PMC10067607 DOI: 10.3389/fphar.2023.1135145] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 03/09/2023] [Indexed: 04/07/2023] Open
Abstract
Severe cases of COVID-19 are characterized by hyperinflammation induced by cytokine storm, ARDS leading to multiorgan failure and death. JAK-STAT signaling has been implicated in immunopathogenesis of COVID-19 infection under different stages such as viral entry, escaping innate immunity, replication, and subsequent inflammatory processes. Prompted by this fact and prior utilization as an immunomodulatory agent for several autoimmune, allergic, and inflammatory conditions, Jakinibs have been recognized as validated small molecules targeting the rapid release of proinflammatory cytokines, primarily IL-6, and GM-CSF. Various clinical trials are under investigation to evaluate Jakinibs as potential candidates for treating COVID-19. Till date, there is only one small molecule Jakinib known as baricitinib has received FDA-approval as a standalone immunomodulatory agent in treating critical COVID-19 patients. Though various meta-analyses have confirmed and validated the safety and efficacy of Jakinibs, further studies are required to understand the elaborated pathogenesis of COVID-19, duration of Jakinib treatment, and assess the combination therapeutic strategies. In this review, we highlighted JAK-STAT signalling in the pathogenesis of COVID-19 and clinically approved Jakinibs. Moreover, this review described substantially the promising use of Jakinibs and discussed their limitations in the context of COVID-19 therapy. Hence, this review article provides a concise, yet significant insight into the therapeutic implications of Jakinibs as potential anti-COVID agents which opens up a new horizon in the treatment of COVID-19, effectively.
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Affiliation(s)
- Nem Kumar Jain
- School of Pharmacy, ITM University, Gwalior, Madhya Pradesh, India
- School of Studies in Pharmaceutical Sciences, Jiwaji University, Gwalior, Madhya Pradesh, India
| | - Mukul Tailang
- School of Studies in Pharmaceutical Sciences, Jiwaji University, Gwalior, Madhya Pradesh, India
| | - Hemant Kumar Jain
- Department of General Medicine, Government Medical College, Datia, Madhya Pradesh, India
| | - Balakumar Chandrasekaran
- Faculty of Pharmacy, Philadelphia University, Amman, Jordan
- *Correspondence: Balakumar Chandrasekaran, ; Palani Selvam,
| | - Biswa Mohan Sahoo
- Roland Institute of Pharmaceutical Sciences, Berhampur, Odisha, India
| | - Anandhalakshmi Subramanian
- Department of Microbiology and Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Neelaveni Thangavel
- Department of Pharmaceutical Chemistry and Pharmacognosy, College of Pharmacy, Jazan University, Jazan, Saudi Arabia
| | - Afaf Aldahish
- Department of Pharmacology, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Kumarappan Chidambaram
- Department of Pharmacology, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - M. Alagusundaram
- School of Pharmacy, ITM University, Gwalior, Madhya Pradesh, India
| | - Santosh Kumar
- School of Sciences, ITM University, Gwalior, Madhya Pradesh, India
| | - Palani Selvam
- School of Medicine, College of Medicine and Health Sciences, Jijiga University, Jijiga, Ethiopia
- *Correspondence: Balakumar Chandrasekaran, ; Palani Selvam,
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12
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Jain M, Singh MK, Shyam H, Mishra A, Kumar S, Kumar A, Kushwaha J. Role of JAK/STAT in the Neuroinflammation and its Association with Neurological Disorders. Ann Neurosci 2022; 28:191-200. [PMID: 35341232 PMCID: PMC8948319 DOI: 10.1177/09727531211070532] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/29/2021] [Indexed: 12/26/2022] Open
Abstract
Background: Innate immunity is mediated by a variety of cell types, including microglia,
macrophages, and neutrophils, and serves as the immune system's first line of defense.
There are numerous pathways involved in innate immunity, including the interferon (IFN)
pathway, TRK pathway, mitogen-activated protein kinase (MAPK) pathway, Janus
kinase/signal transducer and activator of transcription (JAK/STAT) pathway, interleukin
(IL) pathways, chemokine pathways (CCR5), GSK signaling, and Fas signaling. Summary: JAK/STAT is one of these important signaling pathways and this review focused on
JAK/STAT signaling pathway only. The overactivation of microglia and astrocytes
influences JAK/STAT's role in neuroinflammatory disease by initiating innate immunity,
orchestrating adaptive immune mechanisms, and ultimately constraining inflammatory and
immunological responses. The JAK/STAT signaling pathway is one of the critical factors
that promotes neuroinflammation in neurodegenerative diseases. Key message: Given the importance of the JAK/STAT pathway in neurodegenerative disease, this review
discussed the feasibility of targeting the JAK/STAT pathway as a neuroprotective therapy
for neurodegenerative diseases in near future.
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Affiliation(s)
- Mayank Jain
- Department of Thoracic Surgery, King George’s Medical University, Lucknow, Uttar Pradesh, India
| | - Mukul Kumar Singh
- Department of Urology, King George’s Medical University, Lucknow, Uttar Pradesh, India
| | - Hari Shyam
- Department of Thoracic Surgery, King George’s Medical University, Lucknow, Uttar Pradesh, India
| | - Archana Mishra
- Department of Thoracic Surgery, King George’s Medical University, Lucknow, Uttar Pradesh, India
| | - Shailendra Kumar
- Department of Thoracic Surgery, King George’s Medical University, Lucknow, Uttar Pradesh, India
| | - Ambrish Kumar
- Department of Vascular Surgery, King George’s Medical University, Lucknow, Uttar Pradesh, India
| | - Jitendra Kushwaha
- Department of General Surgery, King George’s Medical University, Lucknow, Uttar Pradesh, India
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13
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Davidson CD, Gillis NE, Carr FE. Thyroid Hormone Receptor Beta as Tumor Suppressor: Untapped Potential in Treatment and Diagnostics in Solid Tumors. Cancers (Basel) 2021; 13:4254. [PMID: 34503062 PMCID: PMC8428233 DOI: 10.3390/cancers13174254] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 01/07/2023] Open
Abstract
There is compelling evidence that the nuclear receptor TRβ, a member of the thyroid hormone receptor (TR) family, is a tumor suppressor in thyroid, breast, and other solid tumors. Cell-based and animal studies reveal that the liganded TRβ induces apoptosis, reduces an aggressive phenotype, decreases stem cell populations, and slows tumor growth through modulation of a complex interplay of transcriptional networks. TRβ-driven tumor suppressive transcriptomic signatures include repression of known drivers of proliferation such as PI3K/Akt pathway, activation of novel signaling such as JAK1/STAT1, and metabolic reprogramming in both thyroid and breast cancers. The presence of TRβ is also correlated with a positive prognosis and response to therapeutics in BRCA+ and triple-negative breast cancers, respectively. Ligand activation of TRβ enhances sensitivity to chemotherapeutics. TRβ co-regulators and bromodomain-containing chromatin remodeling proteins are emergent therapeutic targets. This review considers TRβ as a potential biomolecular diagnostic and therapeutic target.
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Affiliation(s)
- Cole D. Davidson
- Department of Pharmacology, Larner College of Medicine, University of Vermont, Burlington, VT 05405, USA; (C.D.D.); (N.E.G.)
- University of Vermont Cancer Center, Burlington, VT 05401, USA
| | - Noelle E. Gillis
- Department of Pharmacology, Larner College of Medicine, University of Vermont, Burlington, VT 05405, USA; (C.D.D.); (N.E.G.)
- University of Vermont Cancer Center, Burlington, VT 05401, USA
| | - Frances E. Carr
- Department of Pharmacology, Larner College of Medicine, University of Vermont, Burlington, VT 05405, USA; (C.D.D.); (N.E.G.)
- University of Vermont Cancer Center, Burlington, VT 05401, USA
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14
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Cochran AM, Kornbluth J. Extracellular Vesicles From the Human Natural Killer Cell Line NK3.3 Have Broad and Potent Anti-Tumor Activity. Front Cell Dev Biol 2021; 9:698639. [PMID: 34368150 PMCID: PMC8343581 DOI: 10.3389/fcell.2021.698639] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 06/30/2021] [Indexed: 12/16/2022] Open
Abstract
Natural killer (NK) cells are critical mediators of immune function, responsible for rapid destruction of tumor cells. They kill primarily through the release of granules containing potent cytolytic molecules. NK cells also release these molecules within membrane-bound exosomes and microvesicles - collectively known as extracellular vesicles (EV). Here we report the characterization and anti-tumor function of EVs isolated from NK3.3 cells, a well described clonal normal human NK cell line. We show that NK3.3 EVs contain the cytolytic molecules perforin, granzymes A and B, and granulysin, and an array of common EV proteins. We previously reported that the E3 ubiquitin ligase, natural killer lytic-associated molecule (NKLAM), is localized to NK granules and is essential for maximal NK killing; here we show it is present in the membrane of NK3.3 EVs. NK3.3-derived EVs also carry multiple RNA species, including miRNAs associated with anti-tumor activity. We demonstrate that NK3.3 EVs inhibit proliferation and induce caspase-mediated apoptosis and cell death of an array of both hematopoietic and non-hematopoietic tumor cell lines. This effect is tumor cell specific; normal cells are unaffected by EV treatment. By virtue of their derivation from a healthy donor and ability to be expanded to large numbers, NK3.3 EVs have the potential to be an effective, safe, and universal immunotherapeutic agent.
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Affiliation(s)
- Allyson M. Cochran
- Department of Pathology, Saint Louis University School of Medicine, St. Louis, MO, United States
| | - Jacki Kornbluth
- Department of Pathology, Saint Louis University School of Medicine, St. Louis, MO, United States
- St. Louis VA Medical Center, St. Louis, MO, United States
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15
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Fu B, Lin X, Tan S, Zhang R, Xue W, Zhang H, Zhang S, Zhao Q, Wang Y, Feldman K, Shi L, Zhang S, Nian W, Chaitanya Pavani K, Li Z, Wang X, Wu H. MiR-342 controls Mycobacterium tuberculosis susceptibility by modulating inflammation and cell death. EMBO Rep 2021; 22:e52252. [PMID: 34288348 DOI: 10.15252/embr.202052252] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 05/31/2021] [Accepted: 06/18/2021] [Indexed: 12/11/2022] Open
Abstract
Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis (Mtb) that places a heavy strain on public health. Host susceptibility to Mtb is modulated by macrophages, which regulate the balance between cell apoptosis and necrosis. However, the role of molecular switches that modulate apoptosis and necrosis during Mtb infection remains unclear. Here, we show that Mtb-susceptible mice and TB patients have relatively low miR-342-3p expression, while mice with miR-342-3p overexpression are more resistant to Mtb. We demonstrate that the miR-342-3p/SOCS6 axis regulates anti-Mtb immunity by increasing the production of inflammatory cytokines and chemokines. Most importantly, the miR-342-3p/SOCS6 axis participates in the switching between Mtb-induced apoptosis and necrosis through A20-mediated K48-linked ubiquitination and RIPK3 degradation. Our findings reveal several strategies by which the host innate immune system controls intracellular Mtb growth via the miRNA-mRNA network and pave the way for host-directed therapies targeting these pathways.
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Affiliation(s)
- Beibei Fu
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Xiaoyuan Lin
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Shun Tan
- Chongqing Public Health Medical Center, Chongqing, China
| | - Rui Zhang
- Department of Respiratory Medicine, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weiwei Xue
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, China
| | - Haiwei Zhang
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing, China
| | - Shanfu Zhang
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Qingting Zhao
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Yu Wang
- Technical Center of Chongqing Customs, Chongqing, China
| | - Kelly Feldman
- Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | - Lei Shi
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Shaolin Zhang
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, China
| | - Weiqi Nian
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing, China
| | | | - Zhifeng Li
- School of Life Sciences, Chongqing University, Chongqing, China.,Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Xingsheng Wang
- Department of Respiratory Medicine, Chongqing Emergency Medical Center, Affiliated Central Hospital of Chongqing University, Chongqing, China
| | - Haibo Wu
- School of Life Sciences, Chongqing University, Chongqing, China
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16
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An activity-dependent determinant of synapse elimination in the mammalian brain. Neuron 2021; 109:1333-1349.e6. [PMID: 33770504 DOI: 10.1016/j.neuron.2021.03.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/26/2021] [Accepted: 03/04/2021] [Indexed: 01/06/2023]
Abstract
To establish functional neural circuits in the brain, synaptic connections are refined by neural activity during development, where active connections are maintained and inactive ones are eliminated. However, the molecular signals that regulate synapse refinement remain to be elucidated. When we inactivate a subset of neurons in the mouse cingulate cortex, their callosal connections are eliminated through activity-dependent competition. Using this system, we identify JAK2 tyrosine kinase as a key regulator of inactive synapse elimination. We show that JAK2 is necessary and sufficient for elimination of inactive connections; JAK2 is activated at inactive synapses in response to signals from other active synapses; STAT1, a substrate of JAK2, mediates inactive synapse elimination; JAK2 signaling is critical for physiological refinement of synapses during normal development; and JAK2 regulates synapse refinement in multiple brain regions. We propose that JAK2 is an activity-dependent switch that serves as a determinant of inactive synapse elimination.
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17
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Kim J, Cho M, Kim KI, Min EY, Lim J, Hong S. Transcriptome profiling in head kidney of rainbow trout (Oncorhynchus mykiss) after infection with the low-virulent Nagano genotype of infectious hematopoietic necrosis virus. Arch Virol 2021; 166:1057-1070. [PMID: 33532870 DOI: 10.1007/s00705-021-04980-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 01/15/2021] [Indexed: 12/30/2022]
Abstract
Infectious hematopoietic necrosis virus (IHNV) causes clinical diseases and mortality in a wide variety of salmonid species. Here, we studied transcriptional responses in rainbow trout infected by the IHNV-Nagano strain isolated in Korea. RNA-seq-based transcriptome analysis of head kidney tissues cataloged differentially expressed genes. Enrichment analysis of gene ontology annotations was performed, and a total of fifteen biological process terms were commonly identified at all time points. In the Kyoto Encyclopedia of Genes and Genomes pathway analysis, pathogen recognition receptor (PRR) signaling pathways such as the retinoic-acid-inducible gene-I-like receptor signaling pathway and the Toll-like receptor signaling pathway were identified at all time points. The nucleotide-binding oligomerization-domain-like receptor signaling pathway and cytosolic DNA-sensing pathway were identified at days 1 and 3. Protein-protein interaction network and centrality analyses revealed that the immune system, signaling molecules, and interaction pathways were upregulated at days 1 and 3, with the highest centrality of tumor necrosis factor. Cancer, cellular community, and endocrine system pathways were downregulated, with the highest centrality of fibronectin 1 at day 5. STAT1 was upregulated from days 1 to 5 with a high centrality. The reproducibility and repeatability of the transcriptome analysis were validated by RT-qPCR. IHNV-Nagano infection dynamically changed the transcriptome profiles in the head kidney of rainbow trout and induced a defense mechanism by regulating the immune and inflammatory pathways through PRR signaling at an early stage. Downregulated pathways involved in extracellular matrix formation and focal adhesion at day 5 indicated the possible failure of wound healing, which is important in the pathogenesis of IHNV infection.
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Affiliation(s)
- Jinwoo Kim
- Department of Marine Biotechnology, Gangneung-Wonju National University, Gangneung, 210-702, Korea
| | - Miyoung Cho
- Pathology Research Division, National Institute of Fisheries Science, Busan, Korea
| | - Kwang Il Kim
- Pathology Research Division, National Institute of Fisheries Science, Busan, Korea
| | - Eun Young Min
- Pathology Research Division, National Institute of Fisheries Science, Busan, Korea
| | - Jongwon Lim
- Department of Marine Biotechnology, Gangneung-Wonju National University, Gangneung, 210-702, Korea
| | - Suhee Hong
- Department of Marine Biotechnology, Gangneung-Wonju National University, Gangneung, 210-702, Korea.
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18
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Chaudhry ZL, Klenja D, Janjua N, Cami-Kobeci G, Ahmed BY. COVID-19 and Parkinson's Disease: Shared Inflammatory Pathways Under Oxidative Stress. Brain Sci 2020; 10:brainsci10110807. [PMID: 33142819 PMCID: PMC7693814 DOI: 10.3390/brainsci10110807] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/25/2020] [Accepted: 10/26/2020] [Indexed: 12/20/2022] Open
Abstract
The current coronavirus pandemic caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has resulted in a serious global health crisis. It is a major concern for individuals living with chronic disorders such as Parkinson’s disease (PD). Increasing evidence suggests an involvement of oxidative stress and contribution of NFκB in the development of both COVID-19 and PD. Although, it is early to identify if SARS-CoV-2 led infection enhances PD complications, it is likely that oxidative stress may exacerbate PD progression in COVID-19 affected individuals and/or vice versa. In the current study, we sought to investigate whether NFκB-associated inflammatory pathways following oxidative stress in SARS-CoV-2 and PD patients are correlated. Toward this goal, we have integrated bioinformatics analysis obtained from Basic Local Alignment Search Tool of Protein Database (BLASTP) search for similarities of SARS-CoV-2 proteins against human proteome, literature review, and laboratory data obtained in a human cell model of PD. A Parkinson’s like state was created in 6-hydroxydopamine (6OHDA)-induced differentiated dopamine-containing neurons (dDCNs) obtained from an immortalized human neural progenitor cell line derived from the ventral mesencephalon region of the brain (ReNVM). The results indicated that SARS-CoV-2 infection and 6OHDA-induced toxicity triggered stimulation of caspases-2, -3 and -8 via the NFκB pathway resulting in the death of dDCNs. Furthermore, specific inhibitors for NFκB and studied caspases reduced the death of stressed dDCNs. The findings suggest that knowledge of the selective inhibition of caspases and NFκB activation may contribute to the development of potential therapeutic approaches for the treatment of COVID-19 and PD.
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Affiliation(s)
- Zahara L. Chaudhry
- Institute of Biomedical & Environmental Science and Technology, School of Life Sciences, Faculty of Creative Arts, Technologies & Science, University Square, University of Bedfordshire, Luton LU1 3JU, UK; (Z.L.C.); (G.C.-K.)
| | - Donika Klenja
- School of Cellular and Molecular Medicine, University of Bristol, University Walk, Bristol BS8 1TD, UK;
| | - Najma Janjua
- Faculty of Medicine, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama 701-0192, Japan;
| | - Gerta Cami-Kobeci
- Institute of Biomedical & Environmental Science and Technology, School of Life Sciences, Faculty of Creative Arts, Technologies & Science, University Square, University of Bedfordshire, Luton LU1 3JU, UK; (Z.L.C.); (G.C.-K.)
| | - Bushra Y. Ahmed
- Institute of Biomedical & Environmental Science and Technology, School of Life Sciences, Faculty of Creative Arts, Technologies & Science, University Square, University of Bedfordshire, Luton LU1 3JU, UK; (Z.L.C.); (G.C.-K.)
- Correspondence:
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19
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Role of the JAK/STAT Pathway in Cervical Cancer: Its Relationship with HPV E6/E7 Oncoproteins. Cells 2020; 9:cells9102297. [PMID: 33076315 PMCID: PMC7602614 DOI: 10.3390/cells9102297] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/11/2020] [Accepted: 10/12/2020] [Indexed: 02/06/2023] Open
Abstract
The janus kinase (JAK)/signal transducer and activator of transcription (STAT) signaling pathway is associated with the regulation of essential cellular mechanisms, such as proliferation, invasion, survival, inflammation, and immunity. Aberrant JAK/STAT signaling contributes to cancer progression and metastatic development. STAT proteins play an essential role in the development of cervical cancer, and the inhibition of the JAK/STAT pathway may be essential for enhancing tumor cell death. Persistent activation of different STATs is present in a variety of cancers, including cervical cancer, and their overactivation may be associated with a poor prognosis and poor overall survival. The oncoproteins E6 and E7 play a critical role in the progression of cervical cancer and may mediate the activation of the JAK/STAT pathway. Inhibition of STAT proteins appears to show promise for establishing new targets in cancer treatment. The present review summarizes the knowledge about the participation of the different components of the JAK/STAT pathway and the participation of the human papillomavirus (HPV) associated with the process of cellular malignancy.
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20
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Yan Z, Zhan J, Qi W, Lin J, Huang Y, Xue X, Pan X. The Protective Effect of Luteolin in Glucocorticoid-Induced Osteonecrosis of the Femoral Head. Front Pharmacol 2020; 11:1195. [PMID: 32903480 PMCID: PMC7435053 DOI: 10.3389/fphar.2020.01195] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 07/22/2020] [Indexed: 01/22/2023] Open
Abstract
Glucocorticoid-induced osteonecrosis of the femoral head (GIONFH) is a frequently occurring type of nontraumatic osteonecrosis. A failure of the timely treatment can eventually result in the collapse of the subchondral bone structure. Luteolin (Lut), a compound extracted from Rhizoma Drynariae, is reported to possess multiple pharmacological properties including anticancer, antioxidant, antiapoptosis, and antiinflammatory properties. However, whether Lut has a protective effect on the development of GIONFH remains unclear. In this study, we evaluated the effect of Lut on Dexamethasone (Dex)-induced STAT1/caspase3 pathway in vitro and evaluated GIONFH model in vivo. In vitro, Lut inhibited the upregulation of Dex-induced phospho-STAT1, cleaved caspase9, and cleaved caspase3. In addition, Lut inhibited Dex-induced expression of Bax and cytochrome c and increased the expression of B cell lymphoma-2(Bcl-2). In vivo, Lut decreased the proportion of empty lacunae in rats with GIONFH. Taken together, these findings indicate that Lut may have therapeutic potential in the treatment of GIONFH. Further, this effect might be achieved by suppressing mitochondrial apoptosis of osteoblasts via inhibition of STAT1 activity.
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Affiliation(s)
- Zijian Yan
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, WenZhou Medical University, Wenzhou, China
| | - Jingdi Zhan
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, WenZhou Medical University, Wenzhou, China
| | - Weihui Qi
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthpaedics, Wenzhou, China.,The Second School of Medicine, WenZhou Medical University, Wenzhou, China
| | - Jian Lin
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yijiang Huang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xinghe Xue
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiaoyun Pan
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
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The mechanism of cancer drug addiction in ALK-positive T-Cell lymphoma. Oncogene 2019; 39:2103-2117. [PMID: 31804622 PMCID: PMC7060126 DOI: 10.1038/s41388-019-1136-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 11/18/2019] [Accepted: 11/26/2019] [Indexed: 11/12/2022]
Abstract
Rational new strategies are needed to treat tumors resistant to kinase inhibitors. Mechanistic studies of resistance provide fertile ground for development of new approaches. Cancer drug addiction is a paradoxical resistance phenomenon, well-described in MEK-ERK-driven solid tumors, in which drug-target overexpression promotes resistance but a toxic overdose of signaling if inhibitor is withdrawn. This can permit prolonged control of tumors through intermittent dosing. We and others showed previously that cancer drug addiction arises also in the hematologic malignancy ALK-positive anaplastic large-cell lymphoma (ALCL) resistant to ALK-specific tyrosine kinase inhibitors (TKIs). This is driven by overexpression of the fusion kinase NPM1-ALK, but the mechanism by which ALK overactivity drives toxicity upon TKI withdrawal remained obscure. Here we reveal the mechanism of ALK-TKI addiction in ALCL. We interrogated the well-described mechanism of MEK/ERK pathway inhibitor addiction in solid tumors and found it does not apply to ALCL. Instead, phosphoproteomics and confirmatory functional studies revealed STAT1 overactivation is the key mechanism of ALK-TKI addiction in ALCL. Withdrawal of TKI from addicted tumors in vitro and in vivo leads to overwhelming phospho-STAT1 activation, turning on its tumor-suppressive gene-expression program and turning off STAT3’s oncogenic program. Moreover, a novel NPM1-ALK-positive ALCL PDX model showed significant survival benefit from intermittent compared to continuous TKI dosing. In sum, we reveal for the first time the mechanism of cancer-drug addiction in ALK-positive ALCL and the benefit of scheduled intermittent dosing in high-risk patient-derived tumors in vivo.
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Distinct downstream signaling and the roles of VEGF and PlGF in high glucose-mediated injuries of human retinal endothelial cells in culture. Sci Rep 2019; 9:15339. [PMID: 31653890 PMCID: PMC6814860 DOI: 10.1038/s41598-019-51603-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 09/29/2019] [Indexed: 11/08/2022] Open
Abstract
Vascular endothelial growth factor (VEGF) and placental growth factor (PlGF) plays a crucial role in breakdown of the blood-retinal barrier due to hyperpermeability in diabetic retinopathy (DR). However, the distinct signaling driven by VEGF and PlGF in the pathogenesis of DR remains unclear. In this study, we investigated VEGF- and PlGF- related signaling pathways and their roles in cultured human microvascular retinal endothelial cells (hRECs) under high glucose conditions (HG; 25 mM). Apoptotic cell death was evaluated, and FITC conjugated bovine serum albumin across monolayer hRECs served as an index of permeability. Western blots were used to assess the protein levels of VEGF and PlGF, as well as the phosphorylation of p38MAPK, STAT1 and Erk1/2. Knockdown of VEGF and PlGF was performed by using siRNA. Following HG treatment, increases of VEGF and PlGF as well as PKC activity were detected in hRECs. Increased phosphorylations of p38MAPKThr180/Thr182, STAT1Ser727, and Erk1/2Tyr202/Tyr185 as well as VEGFR1Tyr1213 and VEGFR2Tyr1175 were also detected in HG-treated hRECs. Inhibition of PKC activity by Go 6976 prevented HG-induced increases of phosphor-Erk1/2 and nitric oxide synthase (NOS1) expressions as well as hyperpermeability, whereas inhibition of p38MAPK pathway by SB203580 selectively suppressed activation of STAT1 and decreased apoptotic cell death under HG conditions. Moreover, VEGF knockdown predominantly inhibited activation of VEGFR2, and phosphorylation of p38MAPK and STAT1, as well as apoptotic cell death in HG-treated hRECs. Nevertheless, PlGF knockdown mainly suppressed phosphorylation of VEGFR1, PKC, and Erk1/2, as well as NOS1 expressions and hyperpermeability. Taken together, we provide evidence demonstrating that HG-induced elevation of PlGF is responsible for hyperpermeability mainly through increasing activation of PKC-Erk1/2-NOS axis via VEGFR1, while HG-induced elevation of VEGF is associated with induction of apoptotic cell death mainly through increasing activation of p38MAPK/STAT1 signaling via VEGFR2.
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Wei Y, Zhao Q, Gao Z, Lao XM, Lin WM, Chen DP, Mu M, Huang CX, Liu ZY, Li B, Zheng L, Kuang DM. The local immune landscape determines tumor PD-L1 heterogeneity and sensitivity to therapy. J Clin Invest 2019; 129:3347-3360. [PMID: 31112529 DOI: 10.1172/jci127726] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
PD-L1 is a promising therapeutic target in aggressive cancers. However, immune landscapes and cancer hallmarks of human PD-L1+ tumors, as well as their roles in determining therapeutic efficacies are unknown. Here we identified, in detailed studies of gene data regarding 9769 patients of 32 types of human cancers, that PD-L1 could not exclusively represent IFN-γ signature and potentially signified pro-inflammatory myeloid responses in a tumor. PD-L1 heterogeneity endowed by local immune landscapes controlled cancer hallmarks and clinical outcomes of patients. Mechanically, NF-κB signal elicited by macrophage inflammatory responses generated PD-L1+ cancer cells exhibiting capabilities to aggressively survive, support angiogenesis, and metastasize, whereas STAT1 signal triggered by activated T cells induced PD-L1+ cancer cells susceptive to apoptosis. Importantly, PD-L1+ cancer cells generated by macrophages established great resistance to conventional chemotherapy, cytotoxicity of tumor-specific effector T cells, and therapy of immune checkpoint blockade. Therapeutic strategy combining immune checkpoint blockade with macrophage depletion or NF-κB inhibition in vivo effectively and successfully elicited caner regression. Our results provide insight into the functional features of PD-L1+ tumors and suggest that strategies to influence functional activities of inflammatory cells may benefit immune checkpoint blockade therapy.
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Affiliation(s)
- Yuan Wei
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Qiyi Zhao
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zhiliang Gao
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Xiang-Ming Lao
- Cancer Center, State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Wei-Ming Lin
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Dong-Ping Chen
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ming Mu
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Chun-Xiang Huang
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zheng-Yu Liu
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Bo Li
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Limin Zheng
- Cancer Center, State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
| | - Dong-Ming Kuang
- Department of Infectious Diseases, Third Affiliated Hospital, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Cancer Center, State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China.,The Fifth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Enhanced mitochondrial pyruvate transport elicits a robust ROS production to sensitize the antitumor efficacy of interferon-γ in colon cancer. Redox Biol 2018; 20:451-457. [PMID: 30439686 PMCID: PMC6232645 DOI: 10.1016/j.redox.2018.10.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/06/2018] [Accepted: 10/31/2018] [Indexed: 12/12/2022] Open
Abstract
Metabolic reprogramming is a feature of cancer cells and crucial for tumor growth and metastasis. Interferon-γ (IFNγ) is a cytokine that plays a pivotal role in host antitumor immunity. However, little is known about the roles of metabolic reprogramming in immune responses. Here, we show that colon cancer cells reprogram metabolism to coordinate proper cellular responses to IFNγ by downregulating mitochondrial pyruvate carrier (MPC)1 and 2 via STAT3 signaling. Forced overexpression of MPC promote the production of reactive oxygen species and enhance the apoptosis induced by IFNγ in colon cancer cells. Moreover, inhibiting STAT3 sensitize the antitumor efficacy of IFN-γ against colon cancer cells. Our findings present a previously unrecognized mechanism that colon cancer manipulate to resist IFNγ mediated antitumor immunity that have implications for targeting a unique aspect of this disease. IFNγ induces MPC downregulation via stat3 activation. MPC promote the production of ROS and enhance the apoptosis. STAT3 inhibition sensitize the antitumor efficacy of IFN-γ.
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Bousoik E, Montazeri Aliabadi H. "Do We Know Jack" About JAK? A Closer Look at JAK/STAT Signaling Pathway. Front Oncol 2018; 8:287. [PMID: 30109213 PMCID: PMC6079274 DOI: 10.3389/fonc.2018.00287] [Citation(s) in RCA: 237] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Accepted: 07/09/2018] [Indexed: 12/14/2022] Open
Abstract
Janus tyrosine kinase (JAK) family of proteins have been identified as crucial proteins in signal transduction initiated by a wide range of membrane receptors. Among the proteins in this family JAK2 has been associated with important downstream proteins, including signal transducers and activators of transcription (STATs), which in turn regulate the expression of a variety of proteins involved in induction or prevention of apoptosis. Therefore, the JAK/STAT signaling axis plays a major role in the proliferation and survival of different cancer cells, and may even be involved in resistance mechanisms against molecularly targeted drugs. Despite extensive research focused on the protein structure and mechanisms of activation of JAKs, and signal transduction through these proteins, their importance in cancer initiation and progression seem to be underestimated. This manuscript is an attempt to highlight the role of JAK proteins in cancer biology, the most recent developments in targeting JAKs, and the central role they play in intracellular cross-talks with other signaling cascades.
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Affiliation(s)
- Emira Bousoik
- Department of Biomedical and Pharmaceutical Sciences, Center for Targeted Drug Delivery, School of Pharmacy, Chapman University, Irvine, CA, United States.,School of Pharmacy, Omar Al-Mukhtar University, Dèrna, Libya
| | - Hamidreza Montazeri Aliabadi
- Department of Biomedical and Pharmaceutical Sciences, Center for Targeted Drug Delivery, School of Pharmacy, Chapman University, Irvine, CA, United States
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Organophosphate pesticide chlorpyrifos impairs STAT1 signaling to induce dopaminergic neurotoxicity: Implications for mitochondria mediated oxidative stress signaling events. Neurobiol Dis 2018; 117:82-113. [PMID: 29859868 DOI: 10.1016/j.nbd.2018.05.019] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/26/2018] [Accepted: 05/29/2018] [Indexed: 01/13/2023] Open
Abstract
The organophosphate (OP) pesticide chlorpyrifos (CPF), used in agricultural settings, induces developmental and neurological impairments. Recent studies using in vitro cell culture models have reported CPF exposure to have a positive association with mitochondria-mediated oxidative stress response and dopaminergic cell death; however, the mechanism by which mitochondrial reactive oxygen species (ROS) contribute to dopaminergic cell death remains unclear. Therefore, we hypothesized that STAT1, a transcription factor, causes apoptotic dopaminergic cell death via mitochondria-mediated oxidative stress mechanisms. Here we show that exposure of dopaminergic neuronal cells such as N27 cells (immortalized murine mesencephalic dopaminergic cells) to CPF resulted in a dose-dependent increase in apoptotic cell death as measured by MTS assay and DNA fragmentation. Similar effects were observed in CPF-treated human dopaminergic neuronal cells (LUHMES cells), with an associated increase in mitochondrial dysfunction. Moreover, CPF (10 μM) induced time-dependent increase in STAT1 activation coincided with the collapse of mitochondrial transmembrane potential, increase in ROS generation, proteolytic cleavage of protein kinase C delta (PKCδ), inhibition of the mitochondrial basal oxygen consumption rate (OCR), with a concomitant reduction in ATP-linked OCR and reserve capacity, increase in Bax/Bcl-2 ratio and enhancement of autophagy. Additionally, by chromatin immunoprecipitation (ChIP), we demonstrated that STAT1 bound to a putative regulatory sequence in the NOX1 and Bax promoter regions in response to CPF in N27 cells. Interestingly, overexpression of non-phosphorylatable STAT1 mutants (STAT1Y701F and STAT1S727A) but not STAT1 WT construct attenuated the cleavage of PKCδ and ultimately cell death in CPF-treated cells. Furthermore, small interfering RNA knockdown demonstrated STAT1 to be a critical regulator of autophagy and mitochondria-mediated proapoptotic cell signaling events after CPF treatment in N27 cells. Finally, oral administration of CPF (5 mg/kg) in postnatal rats (PNDs 27-61) induced motor deficits, and nigrostriatal dopaminergic neurodegeneration with a concomitant induction of STAT1-dependent proapoptotic cell signaling events. Conversely, co-treatment with mitoapocynin (a mitochondrially-targeted antioxidant) and CPF rescued motor deficits, and restored dopaminergic neuronal survival via abrogation of STAT1-dependent proapoptotic cell signaling events. Taken together, our study identifies a novel mechanism by which STAT1 regulates mitochondria-mediated oxidative stress response, PKCδ activation and autophagy. In this context, the phosphorylation of Tyrosine 701 and Serine 727 in STAT1 was found to be essential for PKCδ cleavage. By attenuating mitochondrial-derived ROS, mitoapocynin may have therapeutic applications for reversing CPF-induced dopaminergic neurotoxicity and associated neurobehavioral deficits as well as neurodegenerative diseases.
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27
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Yang Z, Meng Q, Zhao Y, Han R, Huang S, Li M, Wu X, Cai W, Wang H. Resveratrol Promoted Interferon-α-Induced Growth Inhibition and Apoptosis of SMMC7721 Cells by Activating the SIRT/STAT1. J Interferon Cytokine Res 2018; 38:261-271. [PMID: 29762078 DOI: 10.1089/jir.2017.0130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Interferon-α (IFN-α) resistance is a major hurdle in the treatment of hepatocellular carcinoma (HCC). Signal transducers and activators of transcription 1 (STAT1) play a key role in exerting the antiproliferative and proapoptotic effects of IFN-α on tumors. In this study, we aimed to investigate whether resveratrol can promote IFN-α-induced growth inhibition and the apoptosis on HCC cells through the SIRT/STAT1 pathway. We found that IFN-α induced growth inhibition and apoptosis of SMMC7721 cells, and the effects could be significantly enhanced and blocked by resveratrol and EX527, respectively. Resveratrol not only activated SIRT1 but also induced phosphorylation of STAT1. Further study revealed that ablation of STAT1 reduced the combined antitumor effects of IFN-α and resveratrol, lowered the rate of apoptosis, and improved the viability of SMMC7721 cells. Whereas STAT1 overexpression strengthened the combined antitumor effects of resveratrol and IFN-α. Our findings suggest a novel strategy of using resveratrol to enhance the response of HCC to IFN-α treatment through the SIRT/STAT1 pathway.
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Affiliation(s)
- Zhanchun Yang
- 1 Department of Orthopedic of Fifth Clinical Hospital of Harbin Medical University , Daqing, China
| | - Qingyu Meng
- 2 Department of Pathogenobiology, Daqing Branch of Harbin Medical University , Daqing, China
| | - Yuying Zhao
- 2 Department of Pathogenobiology, Daqing Branch of Harbin Medical University , Daqing, China
| | - Rui Han
- 2 Department of Pathogenobiology, Daqing Branch of Harbin Medical University , Daqing, China
| | - Shishun Huang
- 2 Department of Pathogenobiology, Daqing Branch of Harbin Medical University , Daqing, China
| | - Meiqi Li
- 2 Department of Pathogenobiology, Daqing Branch of Harbin Medical University , Daqing, China
| | - Xuan Wu
- 2 Department of Pathogenobiology, Daqing Branch of Harbin Medical University , Daqing, China
| | - Wenna Cai
- 2 Department of Pathogenobiology, Daqing Branch of Harbin Medical University , Daqing, China
| | - Haihe Wang
- 2 Department of Pathogenobiology, Daqing Branch of Harbin Medical University , Daqing, China
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Zhang J, Guo F, Wei J, Xian M, Tang S, Zhao Y, Liu M, Song L, Geng Y, Yang H, Ding C, Huang L. An integrated approach to identify critical transcription factors in the protection against hydrogen peroxide-induced oxidative stress by Danhong injection. Free Radic Biol Med 2017; 112:480-493. [PMID: 28822748 DOI: 10.1016/j.freeradbiomed.2017.07.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/07/2017] [Accepted: 07/04/2017] [Indexed: 12/18/2022]
Abstract
Oxidative stress plays a vital role in many pathological processes of the cardiovascular diseases. However, the underlying mechanism remains unclear, especially on a transcription factor (TF) level. In this study, a new method, concatenated tandem array of consensus transcription factor response elements (catTFREs), and an Illumina-based RNA-seq technology were integrated to systematically investigate the role of TFs in hydrogen peroxide (H2O2)-induced oxidative stress in cardiomyocytes; the damage was then rescued by Danhong injection (DHI), a Chinese standardized product approved for cardiovascular diseases treatment. The overall gene expression revealed cell apoptosis and DNA repair were vital for cardiomyocytes in resisting oxidative stress. By comprehensively integrating the transcription activity of TFs and their downstream target genes, an important TFs-target network were constructed and 13 TFs were identified as critical TFs in DHI-mediated protection in H2O2-induced oxidative stress. By using the integrated approach, seven TFs of these 13 TFs were also identified in melatonin-mediated protection in H2O2-induced damage. Furthermore, the transcription activity of DNA-(apurinic or apyrimidinic site) lyase (Apex1), Myocyte-specific enhancer factor 2D (Mef2d) and Pre B-cell leukemia transcription factor 3 (Pbx3) was further verified in pluripotent stem cell-derived cardiomyocytes. This research offers a new understanding of cardiomyocytes in response to H2O2-induced oxidative stress and reveals additional potential therapeutic targets. The combination of two parallel omics datasets (corresponding to the transcriptome and proteome) can reduce the noise in high-throughput data and reveal the fundamental changes of the biological process, making it suitable and reliable for investigation of critical targets in many other complicated pathological processes.
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Affiliation(s)
- Jingjing Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Feifei Guo
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Junying Wei
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Minghua Xian
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Shihuan Tang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Ye Zhao
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Mingwei Liu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206, China
| | - Lei Song
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206, China
| | - Ya Geng
- School of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Hongjun Yang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Chen Ding
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206, China; State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Institute of Biomedical Sciences, Fudan University, Shanghai 200433, China.
| | - Luqi Huang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
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Zhang Y, Chen Y, Yun H, Liu Z, Su M, Lai R. STAT1β enhances STAT1 function by protecting STAT1α from degradation in esophageal squamous cell carcinoma. Cell Death Dis 2017; 8:e3077. [PMID: 28981100 PMCID: PMC5682650 DOI: 10.1038/cddis.2017.481] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/20/2017] [Accepted: 08/24/2017] [Indexed: 02/05/2023]
Abstract
STAT1, which carries tumor suppressor functions in several models, consists of two isoforms, namely STAT1α and STAT1β. The biological function and significance of STAT1β has never been examined in human cancer. We examined STAT1β function in esophageal squamous cell carcinoma (ESCC) by transfecting a STAT1β gene into various ESCC cell lines. The interaction between STAT1α and STAT1β was examined by using co-immunoprecipitation and confocal microscopy. The prognostic significance of STAT1β expression, detectable by immunohistochemistry and western blot, was evaluated in a large cohort of ESCC patients. Enforced expression of STAT1β induced and prolonged the expression and phosphorylation of STAT1α in ESCC cells, and these effects were amplified by gamma-interferon (IFN-γ). We also found that STAT1β interacts with STAT1α and decreases STAT1α degradation by the proteasome. Moreover, STAT1β substantially increased the DNA binding and transcription activity of STAT1. STAT1β also sensitized ESCC cells to chemotherapeutic agents, including cisplatin and 5-flurouracil. Using western blot and immunohistochemistry, we found that STAT1β was frequently decreased in esophageal cancer, as compared to their adjacent benign esophageal epithelial tissue. Loss of STAT1β significantly correlated with lymph node metastasis, invasion and shorter overall survival in ESCC patients. Therefore, STAT1β plays a key role in enhancing the tumor suppressor function of STAT1α, in ESCC, in a manner that can be amplified by IFN-γ.
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Affiliation(s)
- Ying Zhang
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong Province, China
- Department of Pathology, Shantou University Medical College, No. 22 Xinling Road, Shantou, Guangdong 515041, China. Tel: 0086 89920746; Fax: +86 754 88 900 429; E-mail:
| | - Yelong Chen
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong Province, China
- Department of Orthopaedics, First Affiliated Hospital of Shantou University Medical College, 57 Changping Road, Shantou, Guangdong 515041, China
| | - Hailong Yun
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Zhaoyong Liu
- Department of Orthopaedics, First Affiliated Hospital of Shantou University Medical College, 57 Changping Road, Shantou, Guangdong 515041, China
| | - Min Su
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Raymond Lai
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
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Blockade of IDO-kynurenine-AhR metabolic circuitry abrogates IFN-γ-induced immunologic dormancy of tumor-repopulating cells. Nat Commun 2017; 8:15207. [PMID: 28488695 PMCID: PMC5436221 DOI: 10.1038/ncomms15207] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 03/09/2017] [Indexed: 12/18/2022] Open
Abstract
Interactions with the immune system may lead tumorigenic cells into dormancy. However, the underlying molecular mechanism is poorly understood. Using a 3D fibrin gel model, we show that IFN-γ induces tumour-repopulating cells (TRCs) to enter dormancy through an indolamine 2,3-dioxygenase 1 (IDO1)-kynurenine (Kyn)-aryl hydrocarbon receptor (AhR)-p27 dependent pathway. Mechanistically, IFN-γ signalling triggers differentiated tumour cell apoptosis via STAT1; however, when IDO1 and AhR are highly expressed as in TRCs, IFN-γ results in IDO1/AhR-dependent p27 induction that prevents STAT1 signalling, thus suppressing the process of cell death and activating the dormancy program. Blocking the IDO/AhR metabolic circuitry not only abrogates IFN-γ-induced dormancy but also results in enhanced repression of tumour growth by IFN-γ-induced apoptosis of TRCs both in vitro and in vivo. These data present a previously unrecognized mechanism of inducing TRC dormancy by IFN-γ, suggesting a potential effective cancer immunotherapeutic modality through the combination of IFN-γ and IDO/AhR inhibitors. Tumour repopulating cells (TRC) are stem-like cells that can escape immune-mediated killing. Here, the authors show IFN-γ results in either dormancy or apoptosis of TRC depending on the activation of the IDO1 metabolic pathway, and that combining IFN-γ with IDO1 inhibitors results in enhanced tumour regression.
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31
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EGFR-mediated apoptosis via STAT3. Exp Cell Res 2017; 356:93-103. [PMID: 28433699 DOI: 10.1016/j.yexcr.2017.04.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 04/06/2017] [Accepted: 04/08/2017] [Indexed: 11/20/2022]
Abstract
The Epidermal Growth Factor Receptor (EGFR) is a cell surface receptor with primary implications in cell growth in both normal and malignant tissue. Paradoxically, cell lines that hyperexpress the EGFR have been documented to undergo receptor-mediated apoptosis. The underlying mechanism by which EGF-induced apoptosis occurs however remains inexplicit. In an attempt to identify this mechanism, we assessed downstream effectors of EGFR in MDA-MB-468 cells during conditions of EGF-induced apoptosis. The effector assessment revealed STAT3 as a potential mediator of EGF-induced apoptosis. Alternative strategies for activating STAT3, independent of EGFR stimulation, resulted in the induction of the apoptotic pathways. A reduction in STAT3 expression via RNAi resulted in a significant attenuation of EGF-induced PARP cleavage. Our findings support STAT3 as a positive mediator of EGF-induced apoptosis in MDA-MB-468 cells.
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De Beuckelaer A, Grooten J, De Koker S. Type I Interferons Modulate CD8 + T Cell Immunity to mRNA Vaccines. Trends Mol Med 2017; 23:216-226. [PMID: 28185789 DOI: 10.1016/j.molmed.2017.01.006] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 01/03/2017] [Accepted: 01/13/2017] [Indexed: 12/24/2022]
Abstract
mRNA vaccines have emerged as potent tools to elicit antitumor T cell immunity. They are characterized by a strong induction of type I interferons (IFNs), potent inflammatory cytokines affecting T cell differentiation and survival. Recent reports have attributed opposing roles for type I IFNs in modulating CD8+ T cell immunity to mRNA vaccines, from profoundly stimulatory to strongly inhibitory. The mechanisms behind this duality are unclear. Disentangling the factors governing the beneficial or detrimental impact of type I IFNs on CD8+ T cell responses is vital to the design of mRNA vaccines of increased potency. In light of recent advancements regarding the complex role of type I IFNs in regulating CD8+ T cell immunity to infectious diseases, we posit that the dual outcome of type I IFNs on CD8+ T cell responses to mRNA vaccination is determined by the timing and intensity of type I IFN induction relative to T cell receptor (TCR) activation.
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Affiliation(s)
- Ans De Beuckelaer
- Laboratory of Molecular Immunology, Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Johan Grooten
- Laboratory of Molecular Immunology, Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
| | - Stefaan De Koker
- Laboratory of Molecular Immunology, Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Cytokine Receptor Laboratory, Department of Biochemistry, Ghent University, Ghent, Belgium
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33
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Kumar A, Gaur GK, Gandham RK, Panigrahi M, Ghosh S, Saravanan BC, Bhushan B, Tiwari AK, Sulabh S, Priya B, V N MA, Gupta JP, Wani SA, Sahu AR, Sahoo AP. Global gene expression profile of peripheral blood mononuclear cells challenged with Theileria annulata in crossbred and indigenous cattle. INFECTION GENETICS AND EVOLUTION 2016; 47:9-18. [PMID: 27840256 DOI: 10.1016/j.meegid.2016.11.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 11/03/2016] [Accepted: 11/09/2016] [Indexed: 12/28/2022]
Abstract
Bovine tropical theileriosis is an important haemoprotozoan disease associated with high rates of morbidity and mortality particularly in exotic and crossbred cattle. It is one of the major constraints of the livestock development programmes in India and Southeast Asia. Indigenous cattle (Bos indicus) are reported to be comparatively less affected than exotic and crossbred cattle. However, genetic basis of resistance to tropical theileriosis in indigenous cattle is not well documented. Recent studies incited an idea that differentially expressed genes in exotic and indigenous cattle play significant role in breed specific resistance to tropical theileriosis. The present study was designed to determine the global gene expression profile in peripheral blood mononuclear cells derived from indigenous (Tharparkar) and cross-bred cattle following in vitro infection of T. annulata (Parbhani strain). Two separate microarray experiments were carried out each for cross-bred and Tharparkar cattle. The cross-bred cattle showed 1082 differentially expressed genes (DEGs). Out of total DEGs, 597 genes were down-regulated and 485 were up-regulated. Their fold change varied from 2283.93 to -4816.02. Tharparkar cattle showed 875 differentially expressed genes including 451 down-regulated and 424 up-regulated. The fold change varied from 94.93 to -19.20. A subset of genes was validated by qRT-PCR and results were correlated well with microarray data indicating that microarray results provided an accurate report of transcript level. Functional annotation study of DEGs confirmed their involvement in various pathways including response to oxidative stress, immune system regulation, cell proliferation, cytoskeletal changes, kinases activity and apoptosis. Gene network analysis of these DEGs plays an important role to understand the interaction among genes. It is therefore, hypothesized that the different susceptibility to tropical theileriosis exhibited by indigenous and crossbred cattle is due to breed-specific differences in the dealing of infected cells with other immune cells, which ultimately influence the immune response responded against T. annulata infection.
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Affiliation(s)
- Amod Kumar
- Division of Animal Genetics, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Gyanendra Kumar Gaur
- Division of Animal Genetics, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India.
| | - Ravi Kumar Gandham
- Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India.
| | - Manjit Panigrahi
- Division of Animal Genetics, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Shrikant Ghosh
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - B C Saravanan
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Bharat Bhushan
- Division of Animal Genetics, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Ashok Kumar Tiwari
- Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Sourabh Sulabh
- Division of Animal Genetics, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Bhuvana Priya
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Muhasin Asaf V N
- Division of Animal Genetics, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Jay Prakash Gupta
- Division of Animal Genetics, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Sajad Ahmad Wani
- Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Amit Ranjan Sahu
- Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
| | - Aditya Prasad Sahoo
- Division of Veterinary Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, UP, India
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Nunes C, Teixeira N, Serra D, Freitas V, Almeida L, Laranjinha J. Red wine polyphenol extract efficiently protects intestinal epithelial cells from inflammation via opposite modulation of JAK/STAT and Nrf2 pathways. Toxicol Res (Camb) 2016; 5:53-65. [PMID: 30090326 PMCID: PMC6061778 DOI: 10.1039/c5tx00214a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 10/01/2015] [Indexed: 12/17/2022] Open
Abstract
The development of therapeutic approaches combining efficacy and safety represents an important goal in intestinal inflammation research. Recently, evidence has supported dietary polyphenols as useful tools in the treatment and prevention of chronic inflammatory diseases, but the mechanisms of action are still poorly understood. We here reveal molecular mechanisms underlying the anti-inflammatory action of a non-alcoholic polyphenol red wine extract (RWE), operating at complementary levels via the Janus kinase/signal transducer and activator of transcription (JAK/STAT) and Nuclear factor-erythroid 2-related factor-2 (Nrf2) pathways. RWE significantly reduced the nuclear levels of phosphorylated STAT1 and also the cellular levels of phosphorylated JAK1 induced by cytokines, suppressing the JAK/STAT inflammatory signalling cascade. In turn, RWE increased the Nrf2 nuclear level, activating the Nrf2 pathway, leading not only to an up-regulation of the heme oxygenase-1 (HO-1) expression but also to an increase of the glutamate-cysteine ligase subunit catalytic (GCLc) gene expression, enhancing the GSH synthesis, thereby counteracting GSH depletion that occurs under inflammatory conditions. Overall, data indicate that the anti-inflammatory action of RWE is exerted at complementary levels, via suppression of the JAK/STAT inflammatory pathway and positive modulation of the activity of Nrf2. These results point to the potential use of the RWE as an efficient, readily available and inexpensive therapeutic strategy in the context of gastrointestinal inflammation.
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Affiliation(s)
- Carla Nunes
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy , University of Coimbra , Health Sciences Campus , Azinhaga de Santa Comba , 3000-548 Coimbra , Portugal .
| | - Natércia Teixeira
- Department of Chemistry , Faculty of Sciences , University of Porto , Portugal
| | - Diana Serra
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy , University of Coimbra , Health Sciences Campus , Azinhaga de Santa Comba , 3000-548 Coimbra , Portugal .
| | - Víctor Freitas
- Department of Chemistry , Faculty of Sciences , University of Porto , Portugal
| | - Leonor Almeida
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy , University of Coimbra , Health Sciences Campus , Azinhaga de Santa Comba , 3000-548 Coimbra , Portugal .
| | - João Laranjinha
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy , University of Coimbra , Health Sciences Campus , Azinhaga de Santa Comba , 3000-548 Coimbra , Portugal .
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Chen J, Wang H, Wang J, Huang S, Zhang W. STAT1 inhibits human hepatocellular carcinoma cell growth through induction of p53 and Fbxw7. Cancer Cell Int 2015; 15:111. [PMID: 26617467 PMCID: PMC4661940 DOI: 10.1186/s12935-015-0253-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 10/07/2015] [Indexed: 01/04/2023] Open
Abstract
Background
Aberrant STAT1 signaling is observed in human hepatocellular carcinoma (HCC) and has been associated with the modulation of cell proliferation and survival. However, the role of STAT1 signaling in HCC and its underlying mechanism remain elusive. Methods We transiently transfected pcDNA3.1-STAT1 and STAT1 siRNA into SMMC7721 and HepG2 cells. Western blot and qRT-PCR examined the expression of protein and RNA of target genes. Cell viability was assessed using MTT assay, and cell cycle and apoptosis were analyzed by flow cytometry. Results We found that STAT1 overexpression increased protein expression of p53 and Fbxw7, and downregulated the expression of cyclin A, cyclin D1, cyclin E, CDK2, Hes-1 and NF-κB p65. These changes led to growth inhibition and induced G0/G1 cell cycle arrest and apoptosis in SMMC7721 and HepG2 cells. Conversely, ablation of STAT1 had the opposite effect on p53, Fbxw7, Hes-1, NF-κB p65, cyclin A, cyclin D1, cyclin E and CDK2, and improved the viability of SMMC7721 and HepG2 cells. Conclusions Our data indicate that STAT1 exerts tumor-suppressive effects in hepatocarcinogenesis through induction of G0/G1 cell cycle arrest and apoptosis, and may provide a basis for the design of new therapies for the intervention of HCC in the clinic.
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Affiliation(s)
- Jiayu Chen
- Department of Laboratory Medicine, School of Medicine, Taizhou University, Taizhou, 318000 Zhejiang China
| | - Haihe Wang
- Department of Pathogenobiology, Daqing Branch of Harbin Medical University, Daqing, 163319 China
| | - Jing Wang
- Department of Endocrinology of Fifth Hospital of Daqing, Daqing, 163714 China
| | - Shishun Huang
- Department of Pathogenobiology, Daqing Branch of Harbin Medical University, Daqing, 163319 China
| | - Wei Zhang
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou, 310058 China
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Hatziieremia S, Mohammed Z, McCall P, Willder JM, Roseweir AK, Underwood MA, Edwards J. Loss of signal transducer and activator of transcription 1 is associated with prostate cancer recurrence. Mol Carcinog 2015; 55:1667-1677. [PMID: 26495772 DOI: 10.1002/mc.22417] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 09/04/2015] [Accepted: 09/14/2015] [Indexed: 01/07/2023]
Abstract
STAT1 loss has previously been implicated in cell line studies to modify prostate cancer cell growth and survival, however the clinical significance of this has not previously been established. This study investigated if STAT1 loss was associated with patient outcome measures and the phenotypic consequence of STAT1 silencing. STAT1 expression was assessed in two patient cohorts with localised (n = 78) and advanced prostate cancer at initial diagnosis (n = 39) by immunohistochemistry (IHC). Impact of STAT1 silencing on prostate cancer cells lines was assessed using Cell Death detection ELISA, TLDA gene signature apoptosis arrays, WST-1 assay, xCELLigence system, clonogenic assay, and wound healing assay. In the localised patient cohort, low expression of STAT1 was associated with shorter time to disease recurrence (3.8 vs 7.3 years, P = 0.02) and disease specific survival (6.6 vs 9.3 years, P = 0.05). In the advanced patient cohort, low expression was associated with shorter time to disease recurrence (2.0 vs 3.9 years, P = 0.001). When STAT1 was silenced in PC3 cells (AR negative) and LNCaP cells (AR positive) silencing did not influence levels of apoptosis in either cell line and had little effect on cell viability in the LNCaP cells. In contrast, STAT1 silencing in the PC3 cells resulted in a pronounced increase in cell viability (WST-1 assay: mock silenced vs STAT1 silenced, P < 0.001), clonagenicity (clonogenic assay: mock silenced vs STAT1 silenced, P < 0.001), and migration (wound healing: mock silenced vs STAT1 silenced, P < 0.001). In conclusion, loss of STAT1 may promote prostate cancer recurrence in AR negative patients via increasing cell viability. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Sophia Hatziieremia
- Unit of Experimental Therapeutics, Institute of Cancer, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Zahra Mohammed
- Unit of Experimental Therapeutics, Institute of Cancer, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Pamela McCall
- Unit of Experimental Therapeutics, Institute of Cancer, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Jennifer M Willder
- Unit of Experimental Therapeutics, Institute of Cancer, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Antonia K Roseweir
- Unit of Experimental Therapeutics, Institute of Cancer, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Mark A Underwood
- Department of Urology, Glasgow Royal Infirmary, NHS Greater Glasgow and Clyde, Glasgow, United Kingdom
| | - Joanne Edwards
- Unit of Experimental Therapeutics, Institute of Cancer, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom.
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Chen J, Zhao J, Chen L, Dong N, Ying Z, Cai Z, Ji D, Zhang Y, Dong L, Li Y, Jiang L, Holtzman MJ, Chen C. STAT1 modification improves therapeutic effects of interferons on lung cancer cells. J Transl Med 2015; 13:293. [PMID: 26351076 PMCID: PMC4562290 DOI: 10.1186/s12967-015-0656-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 08/28/2015] [Indexed: 12/20/2022] Open
Abstract
Background Interferons (IFNs) have potent anti-proliferative, pro-apoptotic, and immunomodulatory activities against cancer. However, the clinical utility of IFNs is limited by toxicity and pharmacokinetics making it difficult to achieve sustained therapeutic levels especially in solid tumors. Methods Signal Transducer and Activator of Transcription 1 (STAT1) or a modified STAT1 (designated STAT1-CC) that is hyper-responsive to IFN were overexpressed in lung cancer SPC-A-1 and H1299 cells using lentiviral vectors. Transduction efficiency was monitored using enhanced green fluorescent protein (EGFP) expression. After transduction, cells were treated with interferon-gamma (IFN-γ) or interferon-beta (IFN-β) and monitored for cell proliferation, migration, and invasiveness using Cell Counting Kit-8 and transwell chamber assays and for apoptosis using Annexin V detection by flow cytometry. In addition, levels of STAT1, STAT1 Tyr-701 phosphorylation (pSTAT1), fibronectin, and β-catenin were determined using western blotting. In the case of IFN-γ stimulation, levels of S100A4, proliferating cell nuclear antigen (PCNA), and c-fos expression were also determined. Results We found that expression of STAT1 or STAT1-CC enhanced the effect of IFN-γ and, IFN-β on inhibition of human lung cancer cell proliferation, migration and invasiveness. Moreover, STAT1 and STAT1-CC expression caused increases in pSTAT1 and decreases in fibronectin and β-catenin levels. STAT1-CC showed increased effects compared to STAT1 on IFN-γ induced pSTAT1 and down-regulation of S100A4, PCNA, and c-fos levels. Conclusion The results show that STAT1-CC exhibited more strength in improving the antitumor response of IFNs in lung cancer cells. Results from this study suggest that combined treatment of IFNs and STAT1-CC might be a feasible approach for the clinical management of lung cancer in the future.
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Affiliation(s)
- Junjie Chen
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
| | - Jialu Zhao
- Department of Pulmonary Medicine, Lishui Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Hospital of Zhejiang University, Lishui, Zhejiang, China.
| | - Lefu Chen
- Department of Neurosurgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Nian Dong
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
| | - Zhaojian Ying
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
| | - Zhenzhen Cai
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
| | - Dongxiang Ji
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
| | - Yong Zhang
- Drug Discovery Program, Pulmonary and Critical Care Medicine, Department of Medicine, Washington University, St. Louis, MO, USA.
| | - Li Dong
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
| | - Yuping Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
| | - Lei Jiang
- Central Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Michael J Holtzman
- Drug Discovery Program, Pulmonary and Critical Care Medicine, Department of Medicine, Washington University, St. Louis, MO, USA.
| | - Chengshui Chen
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China.
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Wu C, Molavi O, Zhang H, Gupta N, Alshareef A, Bone KM, Gopal K, Wu F, Lewis JT, Douglas DN, Kneteman NM, Lai R. STAT1 is phosphorylated and downregulated by the oncogenic tyrosine kinase NPM-ALK in ALK-positive anaplastic large-cell lymphoma. Blood 2015; 126:336-45. [PMID: 25921060 DOI: 10.1182/blood-2014-10-603738] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 04/24/2015] [Indexed: 02/05/2023] Open
Abstract
The tumorigenicity of most cases of ALK-positive anaplastic large-cell lymphoma (ALK+ ALCL) is driven by the oncogenic fusion protein NPM-ALK in a STAT3-dependent manner. Because it has been shown that STAT3 can be inhibited by STAT1 in some experimental models, we hypothesized that the STAT1 signaling pathway is defective in ALK+ ALCL, thereby leaving the STAT3 signaling unchecked. Compared with normal T cells, ALK+ ALCL tumors consistently expressed a low level of STAT1. Inhibition of the ubiquitin-proteasome pathway appreciably increased STAT1 expression in ALK+ ALCL cells. Furthermore, we found evidence that NPM-ALK binds to and phosphorylates STAT1, thereby promoting its proteasomal degradation in a STAT3-dependent manner. If restored, STAT1 is functionally intact in ALK+ ALCL cells, because it effectively upregulated interferon-γ, induced apoptosis/cell-cycle arrest, potentiated the inhibitory effects of doxorubicin, and suppressed tumor growth in vivo. STAT1 interfered with the STAT3 signaling by decreasing STAT3 transcriptional activity/DNA binding and its homodimerization. The importance of the STAT1/STAT3 functional interaction was further highlighted by the observation that short interfering RNA knockdown of STAT1 significantly decreased apoptosis induced by STAT3 inhibition. Thus, STAT1 is a tumor suppressor in ALK+ ALCL. Phosphorylation and downregulation of STAT1 by NPM-ALK represent other mechanisms by which this oncogenic tyrosine kinase promotes tumorigenesis.
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MESH Headings
- Anaplastic Lymphoma Kinase
- Animals
- Apoptosis
- Blotting, Western
- Case-Control Studies
- Cell Proliferation
- Cell Transformation, Neoplastic
- Down-Regulation
- Female
- Gene Expression Regulation, Neoplastic
- Humans
- Immunoenzyme Techniques
- Interferon-gamma
- Lymphoma, Large-Cell, Anaplastic/genetics
- Lymphoma, Large-Cell, Anaplastic/metabolism
- Lymphoma, Large-Cell, Anaplastic/pathology
- Mice
- Mice, SCID
- Phosphorylation
- Proteasome Endopeptidase Complex/metabolism
- Protein-Tyrosine Kinases/genetics
- Protein-Tyrosine Kinases/metabolism
- RNA, Small Interfering/genetics
- Receptor Protein-Tyrosine Kinases/metabolism
- STAT1 Transcription Factor/antagonists & inhibitors
- STAT1 Transcription Factor/genetics
- STAT1 Transcription Factor/metabolism
- STAT3 Transcription Factor/antagonists & inhibitors
- STAT3 Transcription Factor/genetics
- STAT3 Transcription Factor/metabolism
- Signal Transduction
- Tumor Cells, Cultured
- Ubiquitin/metabolism
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Chengsheng Wu
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Ommoleila Molavi
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada; Faculty of Pharmacy, Tabriz University of Medical Science, Tabriz, East Azerbaijan Province, Iran
| | - Haifeng Zhang
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada; Department of Biochemistry and Molecular Biology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Nidhi Gupta
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Abdulraheem Alshareef
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Kathleen M Bone
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Keshav Gopal
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Fang Wu
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | | | | | | | - Raymond Lai
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada; Department of Oncology, University of Alberta, Edmonton, AB, Canada; and DynaLIFE Dx Medical Laboratories, Edmonton, AB, Canada
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Kong LY, Wei J, Haider AS, Liebelt BD, Ling X, Conrad CA, Fuller GN, Levine NB, Priebe W, Sawaya R, Heimberger AB. Therapeutic targets in subependymoma. J Neuroimmunol 2014; 277:168-75. [PMID: 25465288 DOI: 10.1016/j.jneuroim.2014.10.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 10/22/2014] [Accepted: 10/23/2014] [Indexed: 12/31/2022]
Abstract
Subependymomas are usually treated with surgical resection; however, no standard, defined alternative medical therapy is recommended for patients who are not surgical candidates, owing to a paucity of molecular, immunological, and genetic characterization. To address this, an ex vivo functional analysis of the immune microenvironment in subependymoma was conducted, a subependymoma cytokine/chemokine microarray was constructed for the evaluation of operational immune and molecular pathways, and a subependymoma cell line was derived and used to test a variety of cytotoxic agents that target operational pathways identified in subependymoma. We found that immune effectors are detectable within the microenvironment of subependymoma; however, marked immune suppression is not observed. The subependymoma tissue microarrays demonstrated tumor expression of p53, MDM2, HIF-1α, topoisomerase II-β, p-STAT3, and nucleolin, but not EGFRvIII, EphA2, IL-13RA2, CMV, CTLA-4, FoxP3, PD-1, PD-L1, EGFR, PDGF-α, PDGF-β, PDGFR-α, PDGFR-β, PTEN, IGFBP2, PI3K, MDM4, IDH1, mTOR, or Jak2. A topoisomerase inhibitor (WP744, IC50=0.83 μM) and a p-STAT3/HIF-1α inhibitor (WP1066, IC50=3.15 μM) demonstrated a growth inhibition of the subependymoma cell proliferation. Cumulatively, these data suggest that those agents that interfere with oncogenes operational in subependymoma may have clinical impact.
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Affiliation(s)
- Ling-Yuan Kong
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Jun Wei
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Ali S Haider
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Brandon D Liebelt
- Department of Neurosurgery, Houston Methodist, Houston, TX 77030, United States
| | - Xiaoyang Ling
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Charles A Conrad
- Department of Neuro-Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Gregory N Fuller
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Nicholas B Levine
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Waldemar Priebe
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Raymond Sawaya
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Amy B Heimberger
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States.
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40
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Zhang Y, Molavi O, Su M, Lai R. The clinical and biological significance of STAT1 in esophageal squamous cell carcinoma. BMC Cancer 2014; 14:791. [PMID: 25355139 PMCID: PMC4233059 DOI: 10.1186/1471-2407-14-791] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 10/13/2014] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Loss of STAT1 (Signal Transducer and Activator of Transcription-1) has been implicated in the pathobiology of a number of cancer types. Nonetheless, the biological and clinical significance of STAT1 in esophageal squamous cell carcinomas (ESCC) has not been comprehensively studied. METHODS Using immunohistochemistry, we detected the STAT1 expression in a cohort of ESCC patients; In-vitro experiments, we used enforced gene transfection of STAT1C into two STAT1- weak/negative ESCC cell lines and siRNA knockdown of STAT1 in two STAT1-strong ESCC cell lines to detect STAT1 function in ESCC. RESULTS We found that the expression of STAT1 was heterogeneous in ESCC, with 64 (49.0%) strongly positive cases, 59 (45.0%) weakly positive cases and 8 (6.1%) negative cases. STAT1 expression inversely correlated with the depth of tumor invasion and tumor size (p=0.047 and p=0.029, respectively, Chi square). Furthermore, patients with STAT1-strong/weak tumors had a significantly longer survival compared to those with STAT1-negative tumors (33.6 months versus 13.1 months, p=0.019). In patients carrying tumors of aggressive cytology (n=50), those with STAT1-strong tumors survived significantly longer than those with STAT1-weak/negative tumors (34.6 months versus 20.5 months, p=0.011). Our in-vitro experiments revealed that STAT1 is proapoptotic and inhibitory to cell-cycle progression and colony formation. Lastly, we found evidence that STAT1 signaling in ESCC cells down-regulated the expression and/or activity of NF-κB and STAT3, both of which are known to have oncogenic potential. CONCLUSION To conclude, our findings suggest that STAT1 is a tumor suppressor in ESCC. Loss of STAT1, which is frequent in ESCC, contributes to the pathogenesis of these tumors.
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Affiliation(s)
- Ying Zhang
- />Department of Pathology, Shantou University Medical College, 22 Xinling Road, Shantou, 515031 Guangdong Province China
- />Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta Canada
| | - Ommoleila Molavi
- />Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta Canada
| | - Min Su
- />Department of Pathology, Shantou University Medical College, 22 Xinling Road, Shantou, 515031 Guangdong Province China
| | - Raymond Lai
- />Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta Canada
- />Department of Oncology, University of Alberta, Edmonton, Alberta Canada
- />DynaLIFEDX Medical Laboratories, Edmonton, Alberta Canada
- />Department of Laboratory Medicine and Pathology, University of Alberta, 5142 Katz Group Centre for Pharmacy and Health Research, Edmonton, Alberta T6G 2E1 Canada
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Dokduang H, Techasen A, Namwat N, Khuntikeo N, Pairojkul C, Murakami Y, Loilome W, Yongvanit P. STATs profiling reveals predominantly-activated STAT3 in cholangiocarcinoma genesis and progression. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2014; 21:767-76. [PMID: 25044480 DOI: 10.1002/jhbp.131] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND We investigated the aberrant expression of the STAT family in humans and liver fluke (Opisthorchis viverrini, Ov)-induced hamster cholangiocarcinoma (CCA) tissues. METHODS The expression and phosphorylation of STAT1, STAT2, STAT3, STAT4, STAT5a, STAT5b and STAT6 in human hamster CCA tissues were immunohistochemistry-profiled. Localizations of STAT5 in macrophages and lipopolysaccharide (LPS)-induced macrophage-conditioned media mediated STAT3 activation in CCA cells were demonstrated. RESULTS The expressions of STAT 1-4 and 6 were detected in the cytoplasm of hyperplastic bile ducts and tumor cells, whereas STAT5a and STAT5b were observed in macrophages and connective tissues surrounding tumor, respectively. The expressions of STAT3 and STAT5b were significantly observed in tumors with a poorer histological differentiation. STAT3 expression was significantly associated with shorter survival of CCA patients and was predominately activated in CCA cell lines. In the CCA-hamsters, STATs expression was gradually increased along the carcinogenesis, especially at 30 days post-infection in which the inflammatory response was markedly observed, showing the correlation between the inflammation and STATs activation. Moreover, LPS-induced macrophage-conditioned media could mediate STAT3 activation in CCA cells. CONCLUSIONS STAT3 is the major STAT, which plays roles in the inflammation that contributes to CCA carcinogenesis and progression and may serve as a marker for a poor prognosis of CCA.
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Affiliation(s)
- Hasaya Dokduang
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand; Liver Fluke and Cholangiocarcinoma Research Center, Khon Kaen University, Khon Kaen, Thailand
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Cosset É, Petty TJ, Dutoit V, Cordey S, Padioleau I, Otten-Hernandez P, Farinelli L, Kaiser L, Bruyère-Cerdan P, Tirefort D, Amar El-Dusouqui S, Nayernia Z, Krause KH, Zdobnov EM, Dietrich PY, Rigal E, Preynat-Seauve O. Comprehensive metagenomic analysis of glioblastoma reveals absence of known virus despite antiviral-like type I interferon gene response. Int J Cancer 2014; 135:1381-9. [PMID: 24347514 PMCID: PMC4235296 DOI: 10.1002/ijc.28670] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 11/08/2013] [Accepted: 11/20/2013] [Indexed: 11/10/2022]
Abstract
Glioblastoma is a deadly malignant brain tumor and one of the most incurable forms of cancer in need of new therapeutic targets. As some cancers are known to be caused by a virus, the discovery of viruses could open the possibility to treat, and perhaps prevent, such a disease. Although an association with viruses such as cytomegalovirus or Simian virus 40 has been strongly suggested, involvement of these and other viruses in the initiation and/or propagation of glioblastoma remains vague, controversial and warrants elucidation. To exhaustively address the association of virus and glioblastoma, we developed and validated a robust metagenomic approach to analyze patient biopsies via high-throughput sequencing, a sensitive tool for virus screening. In addition to traditional clinical diagnostics, glioblastoma biopsies were deep-sequenced and analyzed with a multistage computational pipeline to identify known or potentially discover unknown viruses. In contrast to the studies reporting the presence of viral signatures in glioblastoma, no common or recurring active viruses were detected, despite finding an antiviral-like type I interferon response in some specimens. Our findings highlight a discrete and non-specific viral signature and uncharacterized short RNA sequences in glioblastoma. This study provides new insights into glioblastoma pathogenesis and defines a general methodology that can be used for high-resolution virus screening and discovery in human cancers.
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Affiliation(s)
- Érika Cosset
- Laboratory of Immunohematology, Hematology Unit, Department of Genetic and Laboratory Medicine, Geneva University Hospitals, University of Geneva, Switzerland
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43
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Xu X, Wen H, Hu Y, Yu H, Zhang Y, Chen C, Pan X. STAT1-caspase 3 pathway in the apoptotic process associated with steroid-induced necrosis of the femoral head. J Mol Histol 2014; 45:473-85. [PMID: 24554068 DOI: 10.1007/s10735-014-9571-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 02/11/2014] [Indexed: 12/15/2022]
Abstract
Osteocyte apoptosis is the main manifestation of steroid-induced avascular necrosis of the femoral head (SANFH). STAT1 and caspase 3 participate in the process of apoptosis and STAT1 upregulates the expression of caspase 3. We examined the relationship between the STAT1-caspase 3 pathway and apoptosis in SANFH. All specimens were divided into four groups: the negative control group, Ficat I-II group, Ficat III group, and Ficat IV-V group, and examined histologically, with a TUNEL assay, immunohistochemically, with a caspase 3 activity assay, with ELISAs of STAT1 and phospo-STAT1 (p-STAT1), with a western blotting analysis of p-STAT1 and with real-time RT-PCR. The proportion of empty lacunae increased significantly with the development of SANFH. The proportion of TUNEL-positive cells and immunohistochemical analysis of caspase 3 also increased significantly, although the Ficat I-II group did not differ significantly from the negative control group. Immunohistochemical analysis of STAT1 and p-STAT1, caspase 3 activity all showed significant differences among the groups. An ELISA and a western blotting analysis of p-STAT1 showed significant differences among the groups. An ELISA of STAT1, real-time RT-PCR analysis of caspase 3 and STAT1 all showed significant differences among the groups except between the Ficat I-II and negative control groups. The correlation analysis showed strong positive relationships between the proportion of empty lacunae and the proportion of TUNEL-positive cells between caspase 3 activity and the proportion of TUNEL-positive cells and between the levels of p-STAT1 protein and caspase 3 mRNA. The apoptotic process in SANFH develops with the upregulated expression of caspase 3 via the expression and activation of STAT1. The STATI-caspase 3 pathway plays a critical role in the development of SANFH.
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Affiliation(s)
- Xinxian Xu
- Osteopathy Department, Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
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Leitner NR, Lassnig C, Rom R, Heider S, Bago-Horvath Z, Eferl R, Müller S, Kolbe T, Kenner L, Rülicke T, Strobl B, Müller M. Inducible, dose-adjustable and time-restricted reconstitution of STAT1 deficiency in vivo. PLoS One 2014; 9:e86608. [PMID: 24489749 PMCID: PMC3906053 DOI: 10.1371/journal.pone.0086608] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 12/11/2013] [Indexed: 12/31/2022] Open
Abstract
Signal transducer and activator of transcription (STAT) 1 is a key player in interferon (IFN) signaling, essential in mediating host defense against viruses and other pathogens. STAT1 levels are tightly regulated and loss- or gain-of-function mutations in mice and men lead to severe diseases. We have generated a doxycycline (dox) -inducible, FLAG-tagged Stat1 expression system in mice lacking endogenous STAT1 (i.e. Stat1ind mice). We show that STAT1 expression depends on the time and dose of dox treatment in primary cells and a variety of organs isolated from Stat1ind mice. In bone marrow-derived macrophages, a fraction of the amount of STAT1 present in WT cells is sufficient for full expression of IFN-induced genes. Dox-induced STAT1 established protection against virus infections in primary cells and mice. The availability of the Stat1ind mouse model will enable an examination of the consequences of variable amounts of STAT1. The model will also permit the study of STAT1 dose-dependent and reversible functions as well as of STAT1's contributions to the development, progression and resolution of disease.
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Affiliation(s)
- Nicole R. Leitner
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
- * E-mail: (NRL); (MM)
| | - Caroline Lassnig
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
- University Center Biomodels Austria (BIAT), University of Veterinary Medicine Vienna, Vienna, Austria
| | - Rita Rom
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Susanne Heider
- Clinical Institute of Pathology, Medical University of Vienna, Vienna, Austria
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
| | - Zsuzsanna Bago-Horvath
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
- Clinical Institute of Pathology, Medical University of Vienna, Vienna, Austria
- Institute of Pharmacology and Toxicology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Robert Eferl
- Department of Internal Medicine I, Institute for Cancer Research, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Simone Müller
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Thomas Kolbe
- University Center Biomodels Austria (BIAT), University of Veterinary Medicine Vienna, Vienna, Austria
- Department IFA-Tulln, Biotechnology in Animal Production, University of Natural Resources and Applied Life Sciences, Tulln, Austria
| | - Lukas Kenner
- Clinical Institute of Pathology, Medical University of Vienna, Vienna, Austria
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
| | - Thomas Rülicke
- Institute of Laboratory Animal Science, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Birgit Strobl
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Mathias Müller
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
- University Center Biomodels Austria (BIAT), University of Veterinary Medicine Vienna, Vienna, Austria
- * E-mail: (NRL); (MM)
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Zhang Y, Zhang Y, Yun H, Lai R, Su M. Correlation of STAT1 with apoptosis and cell-cycle markers in esophageal squamous cell carcinoma. PLoS One 2014; 9:e113928. [PMID: 25438156 PMCID: PMC4250046 DOI: 10.1371/journal.pone.0113928] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Accepted: 11/03/2014] [Indexed: 02/05/2023] Open
Abstract
We recently found evidence that STAT1 in esophageal squamous carcinoma (ESCC) cells exerts tumor suppressor function, and it regulates five key regulators of apoptosis or cell-cycle progression, including Bcl-2, Bcl-xL, survivin, cyclin D1 and p21. In this study, we confirmed these findings in four ESCC cell lines. Using immunohistochemistry, we also assessed the expression of these proteins in 62 primary tumors. The expression of these markers was heterogeneous, ranging 39 to 69% of the cohort. Significant correlation was found between STAT1 and three proteins (p21, Bcl-xL and survivin), whereas only a trend was identified for cyclin D1 and Bcl-2. We then correlated the expression of these proteins with several clinicopathologic parameters including lymph node metastasis, depth of invasion, clinical stage and overall survival. Significant correlations were found between Bcl-2 and deep invasion (p = 0.033), survivin and lymph node metastasis (p = 0.006), as well as cyclin D1 and clinical stage (p = 0.014). Patients with p21-positive tumors had a significantly longer survival compared to those with p21-negative tumors (p = 0.031). To conclude, our findings support the concept that STAT1 exerts its tumor suppressor effects in ESCC via modulating the expression of key regulators of apoptosis and cell-cycle progression.
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Affiliation(s)
- Ying Zhang
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong Province, China
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Yaozhong Zhang
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Hailong Yun
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Raymond Lai
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
- Department of Oncology, University of Alberta, Edmonton, Alberta, Canada
- * E-mail: (RL); (MS)
| | - Min Su
- Department of Pathology, Shantou University Medical College, Shantou, Guangdong Province, China
- * E-mail: (RL); (MS)
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Lin YC, Lu MC, Lin C, Chiang MK, Jan MS, Tang HL, Liu HC, Lin WL, Huang CY, Chen CM, Lai YC. Activation of IFN-γ/STAT/IRF-1 in hepatic responses to Klebsiella pneumoniae infection. PLoS One 2013; 8:e79961. [PMID: 24223208 PMCID: PMC3819302 DOI: 10.1371/journal.pone.0079961] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 09/28/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Klebsiella pneumoniae-caused liver abscess (KLA) has become a health problem in Taiwan and is continually reported in other countries. Diabetes mellitus, the most common metabolic disorder, underlies half of the KLA patients in Taiwan. The clinical impact of KLA has been well-documented. Nevertheless, the molecular basis regarding how K. pneumoniae causes liver infection, particularly in diabetic individuals, remains unclear. METHODOLOGY/PRINCIPLE FINDINGS Auto-bioluminescence-expressing K. pneumoniae was inoculated into diabetic mice and age-match naïve control. With the use of in vivo imaging system, translocation of the bioluminescence-expressing K. pneumoniae from intestine to extraintestinal organs, mainly the liver, was noted in 80% of the diabetic mice, whereas the same bacteria causes extraintestinal infections in only 31% of naïve mice. Besides increased morbidity, the severity of hepatic tissue injury was also enhanced in the K. pneumoniae-infected diabetic mice. Upon K. pneumoniae infection, IFN-γ production was significantly evoked in the liver. To mediate IFN-γ signal, STAT (signal transducers and activators of transcription) 1 and 3 were activated in hepatocytes, and so was the expression of IRF (interferon regulatory factor)-1. Moreover, accumulation of neutrophils which was triggered by prolonged production of IL-1β and MIP-2, and significant increases in the level of active caspase 3 and phospho-eIF2α, were exclusively revealed in the K. pneumoniae-infected diabetic mice. CONCLUSION The activation of IFN-γ/STAT/IRF-1 signaling demonstrated by this work emphasizes the role of IFN-γ for mediating the hepatic response to K. pneumoniae infection.
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Affiliation(s)
- Yi-Chun Lin
- Department of Life Sciences, Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
| | - Min-Chi Lu
- Division of Infectious Diseases, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
- Department of Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
- Institute of Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
- * E-mail: (YCL); (MCL); (CMC)
| | - Chingju Lin
- Department of Physiology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Ming-Ko Chiang
- Department of Life Science, National Chung Cheng University, Chia-Yi, Taiwan
| | - Ming-Shiou Jan
- Institute of Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
| | - Hui-Ling Tang
- Department of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Hsu-Chung Liu
- School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Division of Chest Medicine, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Wea-Lung Lin
- School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Pathology, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Chih-Yang Huang
- Graduate Institute of Chinese Medical Science, China Medical University, Taichung, Taiwan
- Graduate Institute of Basic Medical Science Chinese Medical Science, China Medical University, Taichung, Taiwan
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan
| | - Chuan-Mu Chen
- Department of Life Sciences, Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
- * E-mail: (YCL); (MCL); (CMC)
| | - Yi-Chyi Lai
- Division of Infectious Diseases, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
- Department of Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
- Institute of Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
- * E-mail: (YCL); (MCL); (CMC)
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Przanowski P, Dabrowski M, Ellert-Miklaszewska A, Kloss M, Mieczkowski J, Kaza B, Ronowicz A, Hu F, Piotrowski A, Kettenmann H, Komorowski J, Kaminska B. The signal transducers Stat1 and Stat3 and their novel target Jmjd3 drive the expression of inflammatory genes in microglia. J Mol Med (Berl) 2013; 92:239-54. [PMID: 24097101 PMCID: PMC3940857 DOI: 10.1007/s00109-013-1090-5] [Citation(s) in RCA: 144] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 08/30/2013] [Accepted: 09/19/2013] [Indexed: 12/27/2022]
Abstract
UNLABELLED Most neurological diseases are associated with chronic inflammation initiated by the activation of microglia, which produce cytotoxic and inflammatory factors. Signal transducers and activators of transcription (STATs) are potent regulators of gene expression but contribution of particular STAT to inflammatory gene expression and STAT-dependent transcriptional networks underlying brain inflammation need to be identified. In the present study, we investigated the genomic distribution of Stat binding sites and the role of Stats in the gene expression in lipopolysaccharide (LPS)-activated primary microglial cultures. Integration of chromatin immunoprecipitation-promoter microarray data and transcriptome data revealed novel Stat-target genes including Jmjd3, Ccl5, Ezr, Ifih1, Irf7, Uba7, and Pim1. While knockdown of individual Stat had little effect on the expression of tested genes, knockdown of both Stat1 and Stat3 inhibited the expression of Jmjd3 and inflammatory genes. Transcriptional regulation of Jmjd3 by Stat1 and Stat3 is a novel mechanism crucial for launching inflammatory responses in microglia. The effects of Jmjd3 on inflammatory gene expression were independent of its H3K27me3 demethylase activity. Forced expression of constitutively activated Stat1 and Stat3 induced the expression of Jmjd3, inflammation-related genes, and the production of pro-inflammatory cytokines as potently as lipopolysacharide. Gene set enrichment and gene function analysis revealed categories linked to the inflammatory response in LPS and Stat1C + Stat3C groups. We defined upstream pathways that activate STATs in response to LPS and demonstrated contribution of Tlr4 and Il-6 and interferon-γ signaling. Our findings define novel direct transcriptional targets of Stat1 and Stat3 and highlight their contribution to inflammatory gene expression. KEY MESSAGE Combined analysis of genomic Stat occupancy and transcriptome revealed novel Stat target genes in LPS-induced microglia. Jmjd3 transcription factor is a novel transcriptional target of Stat1 and Stat3. Stat1 and Stat3 cooperate with Jmjd3 to induce the expression of pro-inflammatory genes. Constitutively active Stat1 and Stat3 fully mimic the LPS-induced upregulation of inflammatory genes and secretion of cytokines.
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Affiliation(s)
- Piotr Przanowski
- Laboratory of Molecular Neurobiology, Nencki Institute of Experimental Biology, Warsaw, Poland
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Ju H, Li X, Li H, Wang X, Wang H, Li Y, Dou C, Zhao G. Mediation of multiple pathways regulating cell proliferation, migration, and apoptosis in the human malignant glioma cell line U87MG via unphosphorylated STAT1. J Neurosurg 2013; 118:1239-47. [DOI: 10.3171/2013.3.jns122051] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Object
Signal transducer and activator of transcription 1 (STAT1) is thought to be a tumor suppressor protein. The authors investigated the expression and role of STAT1 in glioblastoma.
Methods
Immunohistochemistry was used to detect the expression of STAT1 in glioblastoma and normal brain tissues. Reverse transcription–polymerase chain reaction and Western blot analysis were used to detect mRNA and protein expression levels of STAT1. Cell growth, proliferation, migration, apoptosis, and the expression of related genes and proteins (Bcl-2, Bax, cleaved caspase-3, caspase-9, p21, and proliferating cell nuclear antigen) were examined in vitro via cell counting kit-8, wound-healing, flow cytometry, Rhodamine B, TUNEL, and Western blot assays.
Results
Human glioblastoma had decreased expression of STAT1 proteins. Transfection of the U87MG cells with STAT1 plasmid in vitro demonstrated significant inhibition of cell growth and an increase in apoptotic cell death compared with cells transfected with vector or mock plasmids. These effects were associated with the upregulation of cleaved caspase-3, Bax, and p21 and the downregulation of Bcl-2 expression.
Conclusions
The results of this study suggest that increased expression of STAT1 by transfection with STAT1 plasmid synergistically inhibits human U87MG glioblastoma cell growth in vitro.
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Affiliation(s)
- Haitao Ju
- 1Department of Neurosurgery, First Bethune Hospital of Jilin University
| | - Xin Li
- 2Prostate Diseases Prevention and Treatment Research Center and Department of Pathophysiology, Norman Bethune Medical School, Jilin University, Changchun, Jilin Province
| | - Hong Li
- 3Departments of Oncology and
| | - Xiaojuan Wang
- 4Medical College of Foshan University, Foshan, Guangdong Province, People's Republic of China
| | - Hongwei Wang
- 5Neurosurgery, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia Autonomous Region; and
| | - Yang Li
- 2Prostate Diseases Prevention and Treatment Research Center and Department of Pathophysiology, Norman Bethune Medical School, Jilin University, Changchun, Jilin Province
| | - Changwu Dou
- 5Neurosurgery, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia Autonomous Region; and
| | - Gang Zhao
- 1Department of Neurosurgery, First Bethune Hospital of Jilin University
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Hong XX, Carmichael GG. Innate immunity in pluripotent human cells: attenuated response to interferon-β. J Biol Chem 2013; 288:16196-205. [PMID: 23599426 PMCID: PMC3668775 DOI: 10.1074/jbc.m112.435461] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Revised: 04/18/2013] [Indexed: 12/13/2022] Open
Abstract
Type I interferon (IFN-α/β) binds to cell surface receptors IFNAR1 and IFNAR2 and triggers a signaling cascade that leads to the transcription of hundreds of IFN-stimulated genes. This response is a crucial component in innate immunity in that it establishes an "antiviral state" in cells and protects them against further damage. Previous work demonstrated that, compared with their differentiated counterparts, pluripotent human cells have a much weaker response to cytoplasmic double-stranded RNA (dsRNA) and are only able to produce a minimal amount of IFN-β. We show here that human embryonic stem cells (hESCs) and human induced pluripotent stem cells (hiPSCs) also exhibit an attenuated response to IFN-β. Even though all known type I IFN signaling components are expressed in these cells, STAT1 phosphorylation is greatly diminished upon IFN-β treatment. This attenuated response correlates with a high expression of suppressor of cytokine signaling 1 (SOCS1). Upon differentiation of hESCs into trophoblasts, cells acquire the ability to respond to IFN-β, and this is accompanied by a significant induction of STAT1 phosphorylation as well as a decrease in SOCS1 expression. Furthermore, SOCS1 knockdown in hiPSCs enhances their ability to respond to IFN-β. Taken together, our results suggest that an attenuated cellular response to type I IFNs may be a general feature of pluripotent human cells and that this is associated with high expression of SOCS1.
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Affiliation(s)
- Xiao-Xiao Hong
- From the Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06032
| | - Gordon G. Carmichael
- From the Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06032
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Aspirin enhances IFN-α-induced growth inhibition and apoptosis of hepatocellular carcinoma via JAK1/STAT1 pathway. Cancer Gene Ther 2013; 20:366-74. [PMID: 23703473 DOI: 10.1038/cgt.2013.29] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
STAT1 has a key role in exerting the antiproliferative and proapoptotic effects of interferon (IFN)-α on tumors, and its defects in expression is associated with IFN-α resistance. In this study we want to investigate whether aspirin can improve the antitumor efficiency of IFN-α on hepatocellular carcinoma (HCC) through the activation of STAT1. We found that aspirin not only significantly enhanced IFN-α-induced antiproliferation and apoptosis of HCC in vitro study but also enhanced tumor growth inhibition in nude mice. Although IFN-α alone resulted in significant phosphorylation of both STAT1 and STAT3, aspirin only prompted the IFN-α-induced phosphorylation of STAT1. Further study revealed that aspirin-prompted phosphorylation of STAT1 was activated through phosphorylation of JAK1. Furthermore, aspirin-activated STAT1 upregulated the transcription of proapoptotic IFN-stimulated gene (ISG) of X-linked inhibitor of apoptosis-associated factor-1 and downregulated the transcription of antiapoptotic ISG of G1P3, which in turn promoted the expression of Bax and activation of caspase-9 and caspase-3, thereby sensitizing HCC cells to IFN-α-induced apoptosis. Taken together, our findings suggest a novel strategy of using aspirin to overcome tumor resistance and enhance the effectiveness of IFN-α in HCC treatment through activating STAT1 gene, and have potential implications for improving future IFN-α protein and gene therapy.
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