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Ulloa M, Macías F, Clapp C, Martínez de la Escalera G, Arnold E. Prolactin is an Endogenous Antioxidant Factor in Astrocytes That Limits Oxidative Stress-Induced Astrocytic Cell Death via the STAT3/NRF2 Signaling Pathway. Neurochem Res 2024; 49:1879-1901. [PMID: 38755517 PMCID: PMC11144156 DOI: 10.1007/s11064-024-04147-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/29/2024] [Accepted: 05/02/2024] [Indexed: 05/18/2024]
Abstract
Oxidative stress-induced death of neurons and astrocytes contributes to the pathogenesis of numerous neurodegenerative diseases. While significant progress has been made in identifying neuroprotective molecules against neuronal oxidative damage, little is known about their counterparts for astrocytes. Prolactin (PRL), a hormone known to stimulate astroglial proliferation, viability, and cytokine expression, exhibits antioxidant effects in neurons. However, its role in protecting astrocytes from oxidative stress remains unexplored. Here, we investigated the effect of PRL against hydrogen peroxide (H2O2)-induced oxidative insult in primary cortical astrocyte cultures. Incubation of astrocytes with PRL led to increased enzymatic activity of superoxide dismutase (SOD) and glutathione peroxidase (GPX), resulting in higher total antioxidant capacity. Concomitantly, PRL prevented H2O2-induced cell death, reactive oxygen species accumulation, and protein and lipid oxidation. The protective effect of PRL upon H2O2-induced cell death can be explained by the activation of both signal transducer and activator of transcription 3 (STAT3) and NFE2 like bZIP transcription factor 2 (NRF2) transduction cascades. We demonstrated that PRL induced nuclear translocation and transcriptional upregulation of Nrf2, concurrently with the transcriptional upregulation of the NRF2-dependent genes heme oxygenase 1, Sod1, Sod2, and Gpx1. Pharmacological blockade of STAT3 suppressed PRL-induced transcriptional upregulation of Nrf2, Sod1 and Gpx1 mRNA, and SOD and GPX activities. Furthermore, genetic ablation of the PRL receptor increased astroglial susceptibility to H2O2-induced cell death and superoxide accumulation, while diminishing their intrinsic antioxidant capacity. Overall, these findings unveil PRL as a potent antioxidant hormone that protects astrocytes from oxidative insult, which may contribute to brain neuroprotection.
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Affiliation(s)
- Miriam Ulloa
- Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus UNAM-Juriquilla, 76230, Querétaro, México
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, México
| | - Fernando Macías
- Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus UNAM-Juriquilla, 76230, Querétaro, México
| | - Carmen Clapp
- Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus UNAM-Juriquilla, 76230, Querétaro, México
| | | | - Edith Arnold
- Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus UNAM-Juriquilla, 76230, Querétaro, México.
- CONAHCYT-Universidad Nacional Autónoma de México, Campus UNAM-Juriquilla, Querétaro, México.
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Luo X, Ye Z, Xu C, Chen H, Dai S, Chen W, Bao G. Corosolic acid enhances oxidative stress-induced apoptosis and senescence in pancreatic cancer cells by inhibiting the JAK2/STAT3 pathway. Mol Biol Rep 2024; 51:176. [PMID: 38252208 DOI: 10.1007/s11033-023-09105-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 12/05/2023] [Indexed: 01/23/2024]
Abstract
BACKGROUND Pancreatic cancer (PC) is a fatal human malignancy with a poor prognosis. Corosolic acid (CRA) is a triterpenoid, has been reported to have inhibitory effects on tumor growth. However, the role of CRA on PC has not been explored. Here, we aimed to uncover the molecular mechanisms of CRA in PC progression. METHODS Cell viability, lactate dehydrogenase (LDH) release, cell apoptosis and senescence were detected by cell counting kit-8 (CCK-8), LDH, flow cytometry and senescence associated-β-galactosidase (SA-β-gal) assay. Levels of relevant proteins and oxidative stress (OS) markers were evaluated by Western blot and enzyme-linked immunosorbent assay (ELISA). A xenograft tumor model was established to explore the in vivo effects of CRA on PC. RESULTS We found that CRA inhibited PC cell viability and promoted LDH release in a dose-dependent manner, but had no significant effect on human normal pancreatic ductal epithelial cells HPDE6C7. CRA increased OS-induced cell apoptosis and senescence in HAPC and SW1990 cells. And CRA decreased the levels of anti-apoptotic protein Bcl-2, and elevated the expression of pro-apoptotic protein Bax and senescence-associated proteins P21 and P53. Besides, CRA decreased tumor growth in xenograft models. Furthermore, CRA inactivated the Janus kinase-2 (JAK2)/Signal Transducer and Activator of Transcription 3 (STAT3) signaling pathway in HAPC and SW1990 cells. Functional experiments demonstrated that activation of the JAK2/STAT3 pathway by the JAK2 activator coumermycin A1 (C-A1) or the STAT3 activator colivelin (col) reduced the contribution effect of OS, apoptosis and senescence by CRA. CONCLUSION Taken together, our findings indicated that CRA exerted anti-cancer effects in PC by inhibiting the JAK2/STAT3 pathway.
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Affiliation(s)
- Xu Luo
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan Province, China
| | - Zhengchen Ye
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan Province, China
| | - Chenglei Xu
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan Province, China
| | - Huan Chen
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan Province, China
| | - Shupeng Dai
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan Province, China
| | - Weihong Chen
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan Province, China
| | - Guoqing Bao
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan Province, China.
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Guo Z, Zhong W, Zou Z. miR-98-5p Prevents Hippocampal Neurons from Oxidative Stress and Apoptosis by Targeting STAT3 in Epilepsy in vitro. Neuropsychiatr Dis Treat 2023; 19:2319-2329. [PMID: 37928166 PMCID: PMC10624118 DOI: 10.2147/ndt.s415597] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 08/09/2023] [Indexed: 11/07/2023] Open
Abstract
Purpose Epilepsy is a serious mental disease, for which oxidative stress and hippocampal neuron death after seizure is crucial. Numerous miRNAs are involved in epilepsy. However, the function of miR-98-5p in oxidative stress and hippocampal neuron death after seizure is unclear, which is the purpose of current study. Methods Magnesium ion (Mg2+)-free solution was used to establish the in vitro epilepsy model in hippocampal neurons. Oxidative stress was exhibited by measuring malondialdehyde (MDA) level and superoxide Dismutase (SOD) activity using enzyme-linked immune sorbent assay (ELISA) kits. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and flow cytometry were applied for the examination of neuron viability and apoptosis, respectively. Quantitative reverse-transcription polymerase chain reaction (qRT-PCR) and Western blot were used to evaluate the mRNA and protein levels of miR-98-5p and signal transducer and activator of transcription (STAT3), respectively. The relationship between miR-98-5p and STAT3 was predicted by TargetScan 7.2, and identified by dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. Results miR-98-5p was decreased in the in vitro epileptic model of hippocampal neurons induced by Mg2+-free solution, whose overexpression rescued oxidative stress and neuron apoptosis in epileptic model. Moreover, overexpression of STAT3, one downstream target of miR-98-5p, partially eliminated the effects of miR-98-5p mimic. Conclusion We shed lights on a pivotal mechanism of miR-98-5p in regulating neuron oxidative stress and apoptosis after seizures, providing potential biomarkers for the diagnosis of epilepsy and therapeutic targets for the treatment of epilepsy.
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Affiliation(s)
- Zhizhuan Guo
- Department of Neurology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, 030032, People’s Republic of China
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People’s Republic of China
| | - Wenwen Zhong
- Department of Rehabilitation Medicine, Huangshi Maternal and Child Health Hospital, Edong Medical Group, Huang Shi, Hubei, 435000, People’s Republic of China
| | - Zhengshou Zou
- Department of Neurology, Huangshi Central Hospital, Edong Medical Group, Huangshi, Hubei, 435000, People’s Republic of China
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Lei Y, He J, Hu F, Zhu H, Gu J, Tang L, Luo M. Sequential inspiratory muscle exercise-noninvasive positive pressure ventilation alleviates oxidative stress in COPD by mediating SOCS5/JAK2/STAT3 pathway. BMC Pulm Med 2023; 23:385. [PMID: 37828534 PMCID: PMC10568888 DOI: 10.1186/s12890-023-02656-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 09/13/2023] [Indexed: 10/14/2023] Open
Abstract
BACKGROUND Pulmonary rehabilitation training is of great significance for the prognosis of chronic obstructive pulmonary disease (COPD) patients. The purpose of this study was to investigate the therapeutic effect and pathway of a new sequential noninvasive positive pressure ventilation (NIPPV) + inspiratory muscle training (IMT) therapy. METHODS A total of 100 COPD patients were enrolled and randomly divided into oxygen therapy (OT), NIPPV, IMT and sequential (NIPPV + IMT) group. Lung function, exercise endurance, quality of life, and dyspnea symptoms were examined and recorded. Then, reactive oxygen species (ROS), malonaldehyde (MDA), superoxide dismutase (SOD) and glutathione (GSH) levels were detected by enzyme-linked immunoassay, and suppressor of cytokine signaling 5 (SOCS5)/janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) pathway expression changes were detected by quantitative real time-polymerase chain reaction (qRT-PCR) and western blot. A mouse model of COPD was then established to further verify the effects of SOCS5/JAK2/STAT3 pathways on lung function and oxidative stress. RESULTS After 8 weeks of treatment, NIPPV, IMT or sequential (NIPPV + IMT) significantly improved exercise endurance, quality of life and dyspnea, reduced oxidative stress, promoted SOCS5 expression and inhibited the activation of JAK2/STAT3 pathway, and no significant effect was observed on lung function of COPD patients. Notably, sequential (NIPPV + IMT) showed better therapeutic outcomes than either IMT or NIPPV alone. Moreover, results at the animal level showed that overexpression of SOCS5 significantly reduced pulmonary inflammatory infiltration, pathological changes and oxidative stress levels in COPD mice, enhanced lung function, and inhibited the activation of JAK2/STAT3 pathway. CONCLUSION Our results elucidated that sequential (NIPPV + IMT) significantly relieved COPD development by regulating SOCS5/JAK2/STAT3 signaling-mediated oxidative stress.
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Affiliation(s)
- Yirou Lei
- The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha City, 410016, Hunan Province, P.R. China
| | - Jiaying He
- The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha City, 410016, Hunan Province, P.R. China
| | - Fang Hu
- Department of Respiratory Medicine, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), No. 89 Guhan Road, Furong District, Changsha City, 410016, Hunan Province, P.R. China
| | - Hao Zhu
- Department of Respiratory Medicine, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), No. 89 Guhan Road, Furong District, Changsha City, 410016, Hunan Province, P.R. China
| | - Jing Gu
- Department of Respiratory Medicine, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), No. 89 Guhan Road, Furong District, Changsha City, 410016, Hunan Province, P.R. China
| | - Lijuan Tang
- Department of Respiratory Medicine, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), No. 89 Guhan Road, Furong District, Changsha City, 410016, Hunan Province, P.R. China
| | - Man Luo
- Department of Respiratory Medicine, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), No. 89 Guhan Road, Furong District, Changsha City, 410016, Hunan Province, P.R. China.
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5
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Chen B, Ning K, Sun ML, Zhang XA. Regulation and therapy, the role of JAK2/STAT3 signaling pathway in OA: a systematic review. Cell Commun Signal 2023; 21:67. [PMID: 37013568 PMCID: PMC10071628 DOI: 10.1186/s12964-023-01094-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 02/26/2023] [Indexed: 04/05/2023] Open
Abstract
Osteoarthritis (OA) is a multifactorial chronic disease primarily characterized by the degeneration of articular cartilage. Currently, there is a lack of effective treatments for OA other than surgery. The exploration of the mechanisms of occurrence is important in exploring other new and effective treatments for OA. The current evidence shows that the Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) signaling pathway plays a vital role in cytogenesis and is involved in OA progression. The terms "JAK2", "STAT3", and "Osteoarthritis"were used in a comprehensive literature search in PubMed to further investigate the relationship between the JAK2/STAT3 signaling pathway and OA. This review focuses on the role and mechanism of JAK2/STAT3 signaling in cartilage degradation, subchondral bone dysfunction, and synovial inflammation. In addition, this review summarizes recent evidence of therapeutic approaches to treat OA by targeting the JAK2/STAT3 pathway to accelerate the translation of evidence into the progression of strategies for OA treatment. Video abstract.
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Affiliation(s)
- Bo Chen
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
| | - Ke Ning
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
| | - Ming-Li Sun
- College of Exercise and Health, Shenyang Sport University, Shenyang, China
| | - Xin-An Zhang
- College of Exercise and Health, Shenyang Sport University, Shenyang, China.
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Li W, Jiang H, Bai C, Yu S, Pan Y, Wang C, Li H, Li M, Sheng Y, Chu F, Wang J, Chen Y, Li J, Jiang J. Ac2-26 attenuates hepatic ischemia-reperfusion injury in mice via regulating IL-22/IL-22R1/STAT3 signaling. PeerJ 2022; 10:e14086. [PMID: 36193422 PMCID: PMC9526407 DOI: 10.7717/peerj.14086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 08/29/2022] [Indexed: 01/27/2023] Open
Abstract
Hepatic ischemia-reperfusion injury (HIRI) is one of the major sources of mortality and morbidity associated with hepatic surgery. Ac2-26, a short peptide of Annexin A1 protein, has been proved to have a protective effect against IRI. However, whether it exerts a protective effect on HIRI has not been reported. The HIRI mice model and the oxidative damage model of H2O2-induced AML12 cells were established to investigate whether Ac2-26 could alleviate HIRI by regulating the activation of IL-22/IL-22R1/STAT3 signaling. The protective effect of Ac2-26 was measured by various biochemical parameters related to liver function, apoptosis, inflammatory reaction, mitochondrial function and the expressions of IL-22, IL-22R1, p-STAT3Tyr705. We discovered that Ac2-26 reduced the Suzuki score and cell death rate, and increased the cell viability after HIRI. Moreover, we unraveled that Ac2-26 significantly decreased the number of apoptotic hepatocytes, and the expressions of cleaved-caspase-3 and Bax/Bcl-2 ratio. Furthermore, HIRI increased the contents of malondialdehyde (MDA), NADP+/NADPH ratio and reactive oxygen species (ROS), whereas Ac2-26 decreased them significantly. Additionally, Ac2-26 remarkably alleviated mitochondria dysfunction, which was represented by an increase in the adenosine triphosphate (ATP) content and mitochondrial membrane potential, a decrease in mitochondrial DNA (mtDNA) damage. Finally, we revealed that Ac2-26 pretreatment could significantly inhibit the activation of IL-22/IL22R1/STAT3 signaling. In conclusion, this work demonstrated that Ac2-26 ameliorated HIRI by reducing oxidative stress and inhibiting the mitochondrial apoptosis pathway, which might be closely related to the inhibition of the IL-22/IL22R1/STAT3 signaling pathway.
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Affiliation(s)
- Wanzhen Li
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Hongxin Jiang
- Morphology Lab, Weifang Medical University, Weifang, Shandong, China
| | - Chen Bai
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Shuna Yu
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Yitong Pan
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Chenchen Wang
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Huiting Li
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Ming Li
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Yaxin Sheng
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Fangfang Chu
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Jie Wang
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Yuting Chen
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Jianguo Li
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
| | - Jiying Jiang
- Department of Anatomy, Weifang Medical University, Weifang, Shandong, China
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Zhang Y, Yu L, Yang J, Ding Z, He Y, Wan H. Spectrum effect correlation of yangyin tongnao granules on cerebral ischemia-reperfusion injury rats. Front Pharmacol 2022; 13:947978. [PMID: 36016577 PMCID: PMC9395610 DOI: 10.3389/fphar.2022.947978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 07/12/2022] [Indexed: 11/13/2022] Open
Abstract
Yangyin Tongnao Granules (YYTNG), as traditional Chinese medicine (TCM) compound preparation, have a good curative effect on cerebral ischemia-reperfusion injury. This study aimed to investigate the relationship between the active components of YYTNG in the plasma and the inflammatory response in cerebral ischemia-reperfusion injury rats. High-performance liquid chromatography (HPLC) was conducted to determine the fingerprints at different time points of middle cerebral artery occlusion (MCAO) rats after the administration of YYTNG at different times points. Enzyme-linked immunosorbent assay (ELISA) was performed to detect the levels of interleukin-18 (IL-18) and tumor necrosis factor-α (TNF-α) in the plasma of MCAO rats at different time points. The spectral-effect relationship between the YYTNG fingerprints and inflammatory indexes in vivo was established by combining three different mathematical models, grey correlation, multiple linear regression, and partial least-square method. The results revealed that each chromatographic peak in the HPLC of the plasma exhibited a certain correlation with the inflammatory index, in the following order: P2 >P6 >P5 >P1 >P3 >P4. Therefore, this study successfully established the spectrum-effect correlation of YYTNG on cerebral ischemia-reperfusion injury rats. The results provide a certain guiding ideology for the analyses of the relationship between fingerprints and the pharmacodynamics of TCM prescriptions.
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Affiliation(s)
- Yangyang Zhang
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Li Yu
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jiehong Yang
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhishan Ding
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yu He
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
- *Correspondence: Yu He, ; Haitong Wan,
| | - Haitong Wan
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
- *Correspondence: Yu He, ; Haitong Wan,
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Fan LL, Du R, Liu JS, Jin JY, Wang CY, Dong Y, He WX, Yan RQ, Xiang R. Loss of RTN3 phenocopies chronic kidney disease and results in activation of the IGF2-JAK2 pathway in proximal tubular epithelial cells. Exp Mol Med 2022; 54:653-661. [PMID: 35596061 PMCID: PMC9166791 DOI: 10.1038/s12276-022-00763-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 01/11/2022] [Accepted: 02/03/2022] [Indexed: 11/10/2022] Open
Abstract
Reticulon 3 (RTN3) is an endoplasmic reticulum protein that has previously been shown to play roles in neurodegenerative diseases, but little is known about its function in the kidneys. The aim of the present study was to clarify the roles of RTN3 in chronic kidney disease (CKD) and kidney fibrosis. In this study, RTN3 levels were measured in kidney tissues from healthy controls and CKD or kidney fibrosis patients. An RTN3-null mouse model was generated to explore the pathophysiological roles of RTN3 in the kidneys. The underlying mechanisms were studied in primary proximal tubular epithelial cells and HEK293 cells in vitro. The results showed that (1) a reduction in RTN3 in mice induces CKD and kidney fibrosis; (2) decreased RTN3 expression is found in patients with CKD; (3) RTN3 plays critical roles in regulating collagen biosynthesis and mitochondrial function; and (4) mechanistically, RTN3 regulates these phenotypes by interacting with GC-Rich Promoter Binding Protein 1 (GPBP1), which activates the IGF2-JAK2-STAT3 pathway. Our study indicates that RTN3 might play crucial roles in CKD and kidney fibrosis and that a reduction in RTN3 in the kidneys might be a risk factor for CKD and kidney fibrosis. A protein (RTN3) known to be involved in neurodegenerative diseases may play a causative role in kidney fibrosis or scarring, and chronic kidney disease (CKD). An estimated 20% of CKD cases may have genetic causes and identifying the genes involved may help find better treatments. Ri-Qiang Yan at the University of Connecticut Health, Farmington, USA, and Rong Xian at Central South University, China, noticed that mice in which the gene coding for RTN3 was inactivated had kidney fibrosis. The researchers showed that RTN3 levels were also lower in kidney tissues of patients with CKD than in healthy individuals and that RTN3 levels were inversely proportional to disease progression. Further investigation showed that decreased RTN3 caused extra collagen deposition and misshapen mitochondria, the cellular powerhouses, in the kidney. These results identify a potential novel risk factor for CKD.
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Affiliation(s)
- Liang-Liang Fan
- Department of Nephrology, Third Xiangya Hospital of Central South University, Changsha, 410013, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, 410013, China.,Hunan Key Laboratory of Animal Models for Human Diseases, School of Life Sciences, Central South University, Changsha, 410013, China
| | - Ran Du
- Department of Nephrology, Third Xiangya Hospital of Central South University, Changsha, 410013, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, 410013, China
| | - Ji-Shi Liu
- Department of Nephrology, Third Xiangya Hospital of Central South University, Changsha, 410013, China.,Hunan Key Laboratory of Organ Fibrosis, Third Xiangya Hospital of Central South University, Changsha, 410013, China
| | - Jie-Yuan Jin
- Department of Nephrology, Third Xiangya Hospital of Central South University, Changsha, 410013, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, 410013, China
| | - Chen-Yu Wang
- Department of Nephrology, Third Xiangya Hospital of Central South University, Changsha, 410013, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, 410013, China
| | - Yi Dong
- Department of Nephrology, Third Xiangya Hospital of Central South University, Changsha, 410013, China.,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, 410013, China
| | - Wan-Xia He
- Department of Neuroscience, University of Connecticut Health, Farmington, CT, 06032, United States
| | - Ri-Qiang Yan
- Department of Neuroscience, University of Connecticut Health, Farmington, CT, 06032, United States.
| | - Rong Xiang
- Department of Nephrology, Third Xiangya Hospital of Central South University, Changsha, 410013, China. .,Department of Cell Biology, School of Life Sciences, Central South University, Changsha, 410013, China. .,Hunan Key Laboratory of Animal Models for Human Diseases, School of Life Sciences, Central South University, Changsha, 410013, China. .,Hunan Key Laboratory of Organ Fibrosis, Third Xiangya Hospital of Central South University, Changsha, 410013, China.
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9
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Ko J, Kim JY, Kim BR, Lee EJ, Kikkawa DO, Yoon JS. Signal transducer and activator of transcription 3 as a potential therapeutic target for Graves' orbitopathy. Mol Cell Endocrinol 2021; 534:111363. [PMID: 34116129 DOI: 10.1016/j.mce.2021.111363] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 05/16/2021] [Accepted: 06/04/2021] [Indexed: 12/15/2022]
Abstract
The roles of signal transducer and activator of transcription 3 (STAT3) in inflammation, oxidative stress, and adipogenesis during Graves' orbitopathy (GO) are incompletely understood. Here, STAT3 expression in orbital tissues (from individuals with GO and healthy control subjects) was studied, and the role of STAT3 in GO pathogenesis was examined through small-interfering RNA (siRNA)-mediated silencing in primary orbital fibroblasts. STAT3 mRNA expression was higher in GO orbital tissues than in non-GO tissues. Treatment with proinflammatory cytokines, thyroid-stimulating hormone, or insulin-like growth factor-1 induced STAT3 mRNA in GO orbital fibroblasts, but not in non-GO cells. STAT3 silencing inhibited interleukin-1β-induced inflammatory cytokines and oxidative stress-induced haem oxygenase-1 expression. STAT3 siRNA-transfected GO orbital fibroblasts showed decreased adipocyte differentiation. STAT3 affected proinflammatory cytokine production, oxidative stress responses, and adipogenesis in an in vitro model of GO, suggesting that STAT3 mediates GO pathology, and that modulating STAT3 expression may have therapeutic potential against GO.
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Affiliation(s)
- JaeSang Ko
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Ji-Young Kim
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Bo Ram Kim
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Eun Jig Lee
- Division of Endocrinology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Don O Kikkawa
- Division of Oculofacial Plastic and Reconstructive Surgery, Viterbi Family Department of Ophthalmology, UC San Diego Shiley Eye Institute, La Jolla, CA 95093, USA; Division of Plastic Surgery, UC San Diego, La Jolla, CA 95093, USA
| | - Jin Sook Yoon
- Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, Seoul, 03722, South Korea.
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