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Sun X, Shi C, Dai J, Zhang MQ, Pei DS, Yang L. Targeting the mitochondrial protein YME1L to inhibit osteosarcoma cell growth in vitro and in vivo. Cell Death Dis 2024; 15:346. [PMID: 38769124 PMCID: PMC11106333 DOI: 10.1038/s41419-024-06722-6] [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: 05/03/2023] [Revised: 05/02/2024] [Accepted: 05/03/2024] [Indexed: 05/22/2024]
Abstract
Exploring novel diagnostic and therapeutic biomarkers is extremely important for osteosarcoma. YME1 Like 1 ATPase (YME1L), locating in the mitochondrial inner membrane, is key in regulating mitochondrial plasticity and metabolic activity. Its expression and potential functions in osteosarcoma are studied in the present study. We show that YME1L mRNA and protein expression is significantly elevated in osteosarcoma tissues derived from different human patients. Moreover, its expression is upregulated in various primary and immortalized osteosarcoma cells. The Cancer Genome Atlas database results revealed that YME1L overexpression was correlated with poor overall survival and poor disease-specific survival in sarcoma patients. In primary and immortalized osteosarcoma cells, silencing of YME1L through lentiviral shRNA robustly inhibited cell viability, proliferation, and migration. Moreover, cell cycle arrest and apoptosis were detected in YME1L-silenced osteosarcoma cells. YME1L silencing impaired mitochondrial functions in osteosarcoma cells, causing mitochondrial depolarization, oxidative injury, lipid peroxidation and DNA damage as well as mitochondrial respiratory chain complex I activity inhibition and ATP depletion. Contrarily, forced YME1L overexpression exerted pro-cancerous activity and strengthened primary osteosarcoma cell proliferation and migration. YME1L is important for Akt-S6K activation in osteosarcoma cells. Phosphorylation of Akt and S6K was inhibited after YME1L silencing in primary osteosarcoma cells, but was strengthened with YME1L overexpression. Restoring Akt-mTOR activation by S473D constitutively active Akt1 mitigated YME1L shRNA-induced anti-osteosarcoma cell activity. Lastly, intratumoral injection of YME1L shRNA adeno-associated virus inhibited subcutaneous osteosarcoma xenograft growth in nude mice. YME1L depletion, mitochondrial dysfunction, oxidative injury, Akt-S6K inactivation, and apoptosis were detected in YME1L shRNA-treated osteosarcoma xenografts. Together, overexpressed YME1L promotes osteosarcoma cell growth, possibly by maintaining mitochondrial function and Akt-mTOR activation.
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Affiliation(s)
- Xu Sun
- Department of Hand and Foot Surgery, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou School of Clinical Medicine, Nanjing Medical University, Taizhou, China
| | - Ce Shi
- Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Department of Orthopedics, The Affiliated Suqian Hospital of Xuzhou Medical University, Suqian, China
| | - Jin Dai
- Department of Orthopedics, Suzhou Wujiang District Children's Hospital, Suzhou, China
| | | | - Dong-Sheng Pei
- Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu, China.
| | - Lei Yang
- Department of Orthopedics, Wujin Hospital Affiliated with Jiangsu University, Changzhou, China.
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Kim YS, Lee JS, Jeong MY, Jang JW, Kim MS. Recombinant human fibroblast growth factor 7 obtained from stable Chinese hamster ovary cells enhances wound healing. Biotechnol J 2024; 19:e2300596. [PMID: 38719591 DOI: 10.1002/biot.202300596] [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: 11/01/2023] [Revised: 04/11/2024] [Accepted: 04/11/2024] [Indexed: 05/14/2024]
Abstract
Although fibroblast growth factor 7 (FGF7) is known to promote wound healing, its mass production poses several challenges and very few studies have assessed the feasibility of producing FGF7 in cell lines such as Chinese hamster ovary (CHO) cells. Therefore, this study sought to produce recombinant FGF7 in large quantities and evaluate its wound healing effect. To this end, the FGF7 gene was transfected into CHO cells and FGF7 production was optimized. The wound healing efficacy of N-glycosylated FGF7 was evaluated in animals on days 7 and 14 post-treatment using collagen patches (CPs), FGF7-only, and CP with FGF7 (CP+FGF7), whereas an untreated group was used as the control. Wound healing was most effective in the CP+FGF7 group. Particularly, on day 7 post-exposure, the CP+FGF7 and FGF7-only groups exhibited the highest expression of hydroxyproline, fibroblast growth factor, vascular endothelial growth factor, and transforming growth factor. Epidermalization in H&E staining showed the same order of healing as hydroxyproline content. Additionally, the CP+FGF7 and FGF7-only group exhibited more notable blood vessel formation on days 7 and 14. In conclusion, the prepared FGF7 was effective in promoting wound healing and CHO cells can be a reliable platform for the mass production of FGF7.
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Affiliation(s)
- Young Sik Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, South Korea
- The Institute of Biomaterial and Medical Engineering, Cellumed Co., Ltd., Seoul, Sourh Korea
| | - Jung Soo Lee
- Department of Molecular Science and Technology, Ajou University, Suwon, South Korea
- The Institute of Biomaterial and Medical Engineering, Cellumed Co., Ltd., Seoul, Sourh Korea
| | - Mi Yeong Jeong
- The Institute of Biomaterial and Medical Engineering, Cellumed Co., Ltd., Seoul, Sourh Korea
| | - Ju Woong Jang
- The Institute of Biomaterial and Medical Engineering, Cellumed Co., Ltd., Seoul, Sourh Korea
| | - Moon Suk Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, South Korea
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3
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Zhu X, Chen X, Zhang X, Zhao L, Shen X. MicroRNA‑373‑3p inhibits the proliferation and invasion of non‑small‑cell lung cancer cells by targeting the GAB2/PI3K/AKT pathway. Oncol Lett 2024; 27:221. [PMID: 38586211 PMCID: PMC10996020 DOI: 10.3892/ol.2024.14353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 10/23/2023] [Indexed: 04/09/2024] Open
Abstract
MicroRNAs (miRNAs) were previously demonstrated to be involved in the pathogenesis of non-small-cell lung cancer (NSCLC); however, the roles of certain miRNAs in NSCLC remain to be elucidated. The present study aimed to investigate the functions of screened miRNAs in NSCLC and the potential mechanisms. First, expression profiles of miRNAs were downloaded from the Gene Expression Omnibus (dataset no. GSE29248) and the differentially expressed miRNAs were analyzed by bioinformatics methods. Reverse transcription-quantitative PCR was used to validate the differential expression of miR-373 in clinical samples. The association between miR-373 expression levels and clinicopathological characteristics was also investigated. To further examine how miR-373 mediates the emergence of NSCLC, western blot, Cell Counting Kit-8, cell invasion and wound-healing assays, as well as apoptosis detection and a luciferase assay were used. The results indicated significant downregulation of miR-373 in NSCLC tissues and its low expression was closely associated with the degree of differentiation, clinical stage and tumor size, and was indicative of an unfavorable prognosis for patients with NSCLC. A functional study indicated that overexpression of miR-373 inhibited the proliferation, promoted apoptosis, and suppressed invasion and migration of NSCLC cells. Bioinformatics prediction and functional assays suggested that Grb-associated binding protein 2 (GAB2) was a direct target of miR-373. In addition, GAB2 was found to be significantly upregulated in NSCLC tissues, and clinically, miR-373 was negatively associated with GAB2. Furthermore, overexpression of GAB2 blocked the tumor suppressive effects of miR-373 on NSCLC cells. Mechanistically, miR-373 mimics were able to reduce the expression of GAB2 and subsequently decrease the phosphorylation level of AKT and mTOR protein. The present results indicate that miR-373 exerts its anti-tumor effects in NSCLC cells by targeting the GAB2/PI3K/AKT pathway, suggesting that miR-373 may be a potential therapeutic target in NSCLC.
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Affiliation(s)
- Xunxia Zhu
- Department of Thoracic Surgery, Huadong Hospital, Shanghai 200040, P.R. China
| | - Xiaoyu Chen
- Department of Thoracic Surgery, Huadong Hospital, Shanghai 200040, P.R. China
| | - Xuelin Zhang
- Department of Thoracic Surgery, Huadong Hospital, Shanghai 200040, P.R. China
| | - Liting Zhao
- Department of Thoracic Surgery, Huadong Hospital, Shanghai 200040, P.R. China
| | - Xiaoyong Shen
- Department of Thoracic Surgery, Huadong Hospital, Shanghai 200040, P.R. China
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4
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Bi HE, Zhang J, Yao Y, Wang S, Yao J, Shao Z, Jiang Q. Expression and functional significance of phosphoenolpyruvate carboxykinase 1 in uveal melanoma. Cell Death Discov 2024; 10:196. [PMID: 38670942 PMCID: PMC11053060 DOI: 10.1038/s41420-024-01963-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
Uveal melanoma (UVM), an uncommon yet potentially life-threatening ocular cancer, arises from melanocytes in the uveal tract of the eye. The exploration of novel oncotargets for UVM is of paramount importance. In this study, we show that PCK1 (phosphoenolpyruvate carboxykinase 1) expression is upregulated in various UVM tissues as well as in primary UVM cells and immortalized lines. Furthermore, bioinformatics studies reveal that PCK1 overexpression in UVM correlates with advanced disease stages and poor patient survival. Genetic silencing (utilizing viral shRNA) or knockout (via CRISPR/Cas9) of PCK1 significantly curtailed cell viability, proliferation, cell cycle progression, and motility, while provoking apoptosis in primary and immortalized UVM cells. Conversely, ectopic overexpression of PCK1, achieved through a viral construct, bolstered UVM cell proliferation and migration. Gαi3 expression and Akt phosphorylation were reduced following PCK1 silencing or knockout, but increased after PCK1 overexpression in UVM cells. Restoring Akt phosphorylation through a constitutively active mutant Akt1 (S473D) ameliorated the growth inhibition, migration suppression, and apoptosis induced by PCK1 silencing in UVM cells. Additionally, ectopic expression of Gαi3 restored Akt activation and counteracted the anti-UVM cell effects by PCK1 silencing. In vivo, the growth of subcutaneous xenografts of primary human UVM cells was significantly inhibited following intratumoral injection of adeno-associated virus (aav) expressing PCK1 shRNA. PCK1 depletion, Gαi3 downregulation, Akt inhibition, proliferation arrest, and apoptosis were detected in PCK1-silenced UVM xenografts. Collectively, our findings demonstrate that PCK1 promotes UVM cell growth possibly by modulating the Gαi3-Akt signaling pathway.
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Affiliation(s)
- Hui-E Bi
- The Affiliated Eye Hospital, The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Department of Ophthalmology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Jie Zhang
- Obstetrics and Gynecology Department, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, China
| | - Yujia Yao
- The Affiliated Eye Hospital, The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Suyu Wang
- The Affiliated Eye Hospital, The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Jin Yao
- The Affiliated Eye Hospital, The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China.
| | - Zhijiang Shao
- Department of Ophthalmology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China.
| | - Qin Jiang
- The Affiliated Eye Hospital, The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China.
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Yin DP, Zhang H, Teng H, Zhang D, Chen P, Xie L, Liu JS. Overexpressed Gαi1 exerts pro-tumorigenic activity in nasopharyngeal carcinoma. Cell Death Dis 2023; 14:792. [PMID: 38049415 PMCID: PMC10696052 DOI: 10.1038/s41419-023-06308-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 11/04/2023] [Accepted: 11/14/2023] [Indexed: 12/06/2023]
Abstract
The current study tested the expression and potential functions of Gαi1 in nasopharyngeal carcinoma (NPC). The Cancer Genome Atlas (TCGA) database results demonstrate that Gαi1 transcripts' number in NPC tissues is significantly higher than that in the normal nasal epithelial tissues. Its overexpression correlates with poor survival in certain NPC patients. Moreover, Gαi1 is significantly upregulated in NPC tissues of local primary patients and in different primary human NPC cells. Whereas its expression is relatively low in cancer-surrounding normal tissues and in primary nasal epithelial cells. Genetic silencing (via shRNA strategy) or knockout (via CRISPR-sgRNA method) of Gαi1 substantially suppressed viability, proliferation, cell cycle progression, and migration in primary NPC cells, causing significant caspase-apoptosis activation. Contrarily, ectopic Gαi1 expression exerted pro-tumorigenic activity and strengthened cell proliferation and migration in primary NPC cells. Gαi1 is important for Akt-mTOR activation in NPC cells. Akt-S6K phosphorylation was downregulated after Gαi1 shRNA or KO in primary NPC cells, but strengthened following Gαi1 overexpression. In Gαi1-silenced primary NPC cells, a S473D constitutively-active mutant Akt1 (caAkt1) restored Akt-S6K phosphorylation and ameliorated Gαi1 shRNA-induced proliferation inhibition, migration reduction and apoptosis. Bioinformatics analyses proposed zinc finger protein 384 (ZNF384) as a potential transcription factor of Gαi1. In primary NPC cells, ZNF384 shRNA or knockout (via CRISPR-sgRNA method) decreased Gαi1 mRNA and protein expression, whereas ZNF384 overexpression upregulated it. Importantly, there was an increased binding between ZNF384 protein and the Gαi1 promoter in human NPC tissues and different NPC cells. In vivo studies showed that intratumoral injection of Gαi1-shRNA-expressing adeno-associated virus (AAV) impeded subcutaneous NPC xenograft growth in nude mice. Gαi1 downregulation, Akt-mTOR inactivation, and apoptosis induction were detected in Gαi1-silenced NPC xenograft tissues. Gαi1 KO also effectively inhibited the growth of NPC xenografts in nude mice. Together, overexpressed Gαi1 exerts pro-tumorigenic activity in NPC possibly by promoting Akt-mTOR activation.
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Affiliation(s)
- De-Pei Yin
- Department of Otorhinolaryngology Head and Neck Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
- Department of Otorhinolaryngology Head and Neck Surgery, Children's Hospital of Soochow University, Suzhou, China
| | - Huanle Zhang
- Department of Radiotherapy, Suzhou Ninth People's Hospital, Suzhou, China
| | - Hua Teng
- Department of Otorhinolaryngology Head and Neck Surgery, Jiangsu Province Hospital on Integration of Chinese and Western Medicine, Nanjing, China
| | - Dan Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Peipei Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Children's Hospital of Soochow University, Suzhou, China.
| | - Lixiao Xie
- Department of Otorhinolaryngology Head and Neck Surgery, Children's Hospital of Soochow University, Suzhou, China.
| | - Ji-Sheng Liu
- Department of Otorhinolaryngology Head and Neck Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China.
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Wang S, Gu Y, Cao X, Ge L, He M, Zhang W, Getachew T, Mwacharo JM, Haile A, Quan K, Li Y, Reverter A, Sun W. The identification and validation of target genes of IGFBP3 protein in sheep skeletal muscle cells. Anim Biotechnol 2023; 34:4580-4587. [PMID: 36794322 DOI: 10.1080/10495398.2023.2174875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
This study aimed to identify the target genes of IGFBP3(insulin growth factor binding protein)protein and to investigate its target genes effects on the proliferation and differentiation of Hu sheep skeletal muscle cells. IGFBP3 was an RNA-binding protein that regulates mRNA stability. Previous studies have reported that IGFBP3 promotes the proliferation of Hu sheep skeletal muscle cells and inhibits differentiation, but the downstream genes that bind to it have not been reported yet. We predicted the target genes of IGFBP3 through RNAct and sequencing data, and verified by qPCR and RIP(RNA Immunoprecipitation)experiments, and demonstrated GNAI2(G protein subunit alpha i2)as one of the target gene of IGFBP3. After interference with siRNA, we carried out qPCR, CCK8, EdU, and immunofluorescence experiments, and found that GNAI2 can promote the proliferation and inhibit differentiation of Hu sheep skeletal muscle cells. This study revealed the effects of GNAI2 and provided one of the regulatory mechanisms of IGFBP3 protein underlying sheep muscle development.
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Affiliation(s)
- Shan Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- School of Animal Science and Technology, Jiangsu Agri-animal Husbandry Vocational College, Taizhou, China
| | - Yifei Gu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Xiukai Cao
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
- International Joint Research Laboratory in Universities of Jiangsu Province of China for Domestic Animal Germplasm Resources and Genetic Improvement, Yangzhou University, Yangzhou, China
| | - Ling Ge
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Mingliang He
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Weibo Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Tesfaye Getachew
- International Centre for Agricultural Research in the Dry Areas, Addis Ababa, Ethiopia
| | - Joram M Mwacharo
- International Centre for Agricultural Research in the Dry Areas, Addis Ababa, Ethiopia
| | - Aynalem Haile
- International Centre for Agricultural Research in the Dry Areas, Addis Ababa, Ethiopia
| | - Kai Quan
- College of Animal Science and Technology, Henan University of Animal Husbandry and Economics, Henan Zhengzhou, China
| | - Yutao Li
- CSIRO Agriculture and Food, 306 Carmody Rd, St Lucia, Queensland, Australia
| | - Antonio Reverter
- CSIRO Agriculture and Food, 306 Carmody Rd, St Lucia, Queensland, Australia
| | - Wei Sun
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
- International Joint Research Laboratory in Universities of Jiangsu Province of China for Domestic Animal Germplasm Resources and Genetic Improvement, Yangzhou University, Yangzhou, China
- "Innovative China" "Belt and Road" International Agricultural Technology Innovation Institute for Evaluation, Protection, and Improvement on Sheep Genetic Resource, Yangzhou, China
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Chen ZG, Shi X, Zhang XX, Yang FF, Li KR, Fang Q, Cao C, Chen XH, Peng Y. Neuron-secreted NLGN3 ameliorates ischemic brain injury via activating Gαi1/3-Akt signaling. Cell Death Dis 2023; 14:700. [PMID: 37880221 PMCID: PMC10600254 DOI: 10.1038/s41419-023-06219-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/12/2023] [Accepted: 10/16/2023] [Indexed: 10/27/2023]
Abstract
We here tested the potential activity and the underlying mechanisms of neuroligin-3 (NLGN3) against ischemia-reperfusion-induced neuronal cell injury. In SH-SY5Y neuronal cells and primary murine cortical neurons, NLGN3 activated Akt-mTOR and Erk signalings, and inhibited oxygen and glucose deprivation (OGD)/re-oxygenation (OGD/R)-induced cytotoxicity. Akt activation was required for NLGN3-induced neuroprotection. Gαi1/3 mediated NLGN3-induced downstream signaling activation. NLGN3-induced Akt-S6K1 activation was largely inhibited by Gαi1/3 silencing or knockout. Significantly, NLGN3-induced neuroprotection against OGD/R was almost abolished by Gαi1/3 silencing or knockout. In vivo, the middle cerebral artery occlusion (MCAO) procedure induced NLGN3 cleavage and secretion, and increased its expression and Akt activation in mouse brain tissues. ADAM10 (A Disintegrin and Metalloproteinase 10) inhibition blocked MCAO-induced NLGN3 cleavage and secretion, exacerbating ischemic brain injury in mice. Neuronal silencing of NLGN3 or Gαi1/3 in mice also inhibited Akt activation and intensified MCAO-induced ischemic brain injury. Conversely, neuronal overexpression of NLGN3 increased Akt activation and alleviated MCAO-induced ischemic brain injury. Together, NLGN3 activates Gαi1/3-Akt signaling to protect neuronal cells from ischemia-reperfusion injury.
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Affiliation(s)
- Zhi-Guo Chen
- Department of Neurology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xin Shi
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Xian-Xian Zhang
- Department of Neurology, Affiliated Hospital 6 of Nantong University, Yancheng Third People's Hospital, Yancheng, China
| | - Fang-Fang Yang
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Ke-Ran Li
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Institute of Neuroscience, Soochow University, Suzhou, China
| | - Qi Fang
- Department of Neurology, The First Affiliated Hospital of Soochow University, Suzhou, China.
| | - Cong Cao
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Institute of Neuroscience, Soochow University, Suzhou, China.
| | - Xiong-Hui Chen
- Department of Emergency Surgery, First Affiliated Hospital of Soochow University, Suzhou, China.
| | - Ya Peng
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, China.
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Liu TT, Shi X, Hu HW, Chen JP, Jiang Q, Zhen YF, Cao C, Liu XW, Liu JG. Endothelial cell-derived RSPO3 activates Gαi1/3-Erk signaling and protects neurons from ischemia/reperfusion injury. Cell Death Dis 2023; 14:654. [PMID: 37805583 PMCID: PMC10560285 DOI: 10.1038/s41419-023-06176-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 09/19/2023] [Accepted: 09/26/2023] [Indexed: 10/09/2023]
Abstract
The current study explores the potential function and the underlying mechanisms of endothelial cell-derived R-spondin 3 (RSPO3) neuroprotection against ischemia/reperfusion-induced neuronal cell injury. In both neuronal cells (Neuro-2a) and primary murine cortical neurons, pretreatment with RSPO3 ameliorated oxygen and glucose deprivation (OGD)/re-oxygenation (OGD/R)-induced neuronal cell death and oxidative injury. In neurons RSPO3 activated the Akt, Erk and β-Catenin signaling cascade, but only Erk inhibitors reversed RSPO3-induced neuroprotection against OGD/R. In mouse embryonic fibroblasts (MEFs) and neuronal cells, RSPO3-induced LGR4-Gab1-Gαi1/3 association was required for Erk activation, and either silencing or knockout of Gαi1 and Gαi3 abolished RSPO3-induced neuroprotection. In mice, middle cerebral artery occlusion (MCAO) increased RSPO3 expression and Erk activation in ischemic penumbra brain tissues. Endothelial knockdown or knockout of RSPO3 inhibited Erk activation in the ischemic penumbra brain tissues and increased MCAO-induced cerebral ischemic injury in mice. Conversely, endothelial overexpression of RSPO3 ameliorated MCAO-induced cerebral ischemic injury. We conclude that RSPO3 activates Gαi1/3-Erk signaling to protect neuronal cells from ischemia/reperfusion injury.
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Affiliation(s)
- Ting-Tao Liu
- Shandong University, Department of Neurology, Shandong Provincial Hospital, Jinan, China
- Department of Neurology, Shouguang Hospital of T.C.M, Shouguang, China
| | - Xin Shi
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Hong-Wei Hu
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Ju-Ping Chen
- Department of Neurology, Changshu Hospital of Traditional Chinese Medicine, Changshu, China
| | - Qin Jiang
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Yun-Fang Zhen
- Department of Orthopedics, Children's hospital of Soochow University, Suzhou, China.
| | - Cong Cao
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China.
| | - Xue-Wu Liu
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.
| | - Jian-Gang Liu
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, China.
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9
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Wu F, He J, Deng Q, Chen J, Peng M, Xiao J, Zeng Y, Yi L, Li Z, Tian R, Jiang Z. Neuroglobin inhibits pancreatic cancer proliferation and metastasis by targeting the GNAI1/EGFR/AKT/ERK signaling axis. Biochem Biophys Res Commun 2023; 664:108-116. [PMID: 37141638 DOI: 10.1016/j.bbrc.2023.04.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/11/2023] [Accepted: 04/23/2023] [Indexed: 05/06/2023]
Abstract
Pancreatic cancer is an extremely aggressive malignancy with a very disappointing prognosis. Neuroglobin (NGB), a member of the globin family, has been demonstrated to have a significant role in a variety of tumor forms. The possible role of NGB as a tumor suppressor gene in pancreatic cancer was investigated in this work. Information from the public dataset TCGA combined with GTEx was used to analyze the finding that NGB was commonly downregulated in pancreatic cancer cell lines and tissues, correlating with patient age and prognosis. The expression of NGB in pancreatic cancer was investigated via RT-PCR, qRT-PCR, and Western blot experiments. In-vitro and in-vivo assays, NGB elicited cell cycle arrest in the S phase and apoptosis, hindered migration and invasion, reversed the EMT process, and suppressed cell proliferation and development. The mechanism of action of NGB was predicted via bioinformatics analysis and validated using Western blot and co-IP experiments revealed that NGB inhibited the EGFR/AKT/ERK pathway by binding to and reducing expression of GNAI1 and p-EGFR. In addition, pancreatic cancer cells overexpressing NGB showed increased drug sensitivity to gefitinib (EGFR-TKI). In conclusion, NGB inhibits pancreatic cancer progression by specifically targeting the GNAI1/EGFR/AKT/ERK signaling axis.
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Affiliation(s)
- Fan Wu
- Department of Gastroenterology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Jin He
- Department of Gastroenterology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Qianxi Deng
- Department of Gastroenterology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Jun Chen
- Department of Gastroenterology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Mingyu Peng
- Department of Respiratory & Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Jiayi Xiao
- West China School of Medicine and West China Hospital, Sichuan University, #37 Guoxue Alley, Wuhou District, Chengdu, Sichuan Province, PR China
| | - Yiwei Zeng
- CHINA MEDICAL UNIVERSITY, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning Province, PR China
| | - Lin Yi
- CHONGQING MEDICAL UNIVERSITY, 1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, PR China
| | - Zhuoqing Li
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing, 400030, China
| | - Rui Tian
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing, 400030, China
| | - Zheng Jiang
- Department of Gastroenterology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
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Villaseca S, Romero G, Ruiz MJ, Pérez C, Leal JI, Tovar LM, Torrejón M. Gαi protein subunit: A step toward understanding its non-canonical mechanisms. Front Cell Dev Biol 2022; 10:941870. [PMID: 36092739 PMCID: PMC9449497 DOI: 10.3389/fcell.2022.941870] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 08/01/2022] [Indexed: 11/13/2022] Open
Abstract
The heterotrimeric G protein family plays essential roles during a varied array of cellular events; thus, its deregulation can seriously alter signaling events and the overall state of the cell. Heterotrimeric G-proteins have three subunits (α, β, γ) and are subdivided into four families, Gαi, Gα12/13, Gαq, and Gαs. These proteins cycle between an inactive Gα-GDP state and active Gα-GTP state, triggered canonically by the G-protein coupled receptor (GPCR) and by other accessory proteins receptors independent also known as AGS (Activators of G-protein Signaling). In this review, we summarize research data specific for the Gαi family. This family has the largest number of individual members, including Gαi1, Gαi2, Gαi3, Gαo, Gαt, Gαg, and Gαz, and constitutes the majority of G proteins α subunits expressed in a tissue or cell. Gαi was initially described by its inhibitory function on adenylyl cyclase activity, decreasing cAMP levels. Interestingly, today Gi family G-protein have been reported to be importantly involved in the immune system function. Here, we discuss the impact of Gαi on non-canonical effector proteins, such as c-Src, ERK1/2, phospholipase-C (PLC), and proteins from the Rho GTPase family members, all of them essential signaling pathways regulating a wide range of physiological processes.
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11
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Shi Q, Luo J, Chen W, He Q, Long J, Zhang B. Circ_0060531 knockdown ameliorates IL-22-induced keratinocyte damage by binding to miR-330-5p to decrease GAB1 expression. Autoimmunity 2022; 55:243-253. [PMID: 35293807 DOI: 10.1080/08916934.2022.2037127] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 01/14/2022] [Accepted: 01/30/2022] [Indexed: 11/02/2022]
Abstract
BACKGROUND Psoriasis is a chronic immune-mediated skin disease. Recent studies showed its pathogenesis involved circular RNA (circRNA). However, the role of circ_0060531 in psoriasis development and the behind mechanism remain to be explored. METHODS Psoriasis cell model was constructed by treating keratinocytes (HaCaT cells) using interleukin 22 (IL-22). Expression of circ_0060531, microRNA-330-5p (miR-330-5p) and GRB2 associated binder 1 (GAB1) was determined by quantitative real-time polymerase chain reaction. The functional effects of circ_0060531 on IL-22-caused cell injury were investigated by 3-(4,5-Dimethylthazol-2-yl)-2,5-diphenyltetrazolium bromide, 5-Ethynyl-29-deoxyuridine, wound-healing and enzyme-linked immunosorbent assays. Protein expression was analysed by Western blot. The interactions among circ_0060531, miR-330-5p and GAB1 were identified by dual-luciferase reporter or RNA immunoprecipitation assay. RESULTS Circ_0060531 and GAB1 expression were significantly increased, while miR-330-5p was decreased in psoriatic skin biopsies and IL-22-stimulated HaCaT cells in comparison with controls. In function, circ_0060531 knockdown assuaged IL-22-induced cell proliferation, cell migration and inflammation. Besides, circ_0060531 acted as a miR-330-5p sponge, and regulated the processes of IL-22-treated HaCaT cells by binding to the miRNA. Under the treatment of IL-22, miR-330-5p mediated HaCaT cell damage by targeting GAB1. Importantly, circ_0060531 modulated GAB1 production by interacting with miR-330-5p. CONCLUSION Circ_0060531 knockdown assuaged IL-22-induced keratinocyte dysfunction through miR-330-5p/GAB1 pathway, proving a novel target for the therapy of psoriasis.
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Affiliation(s)
- Quan Shi
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan City, China
| | - Jing Luo
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan City, China
| | - Weiming Chen
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan City, China
| | - Qi He
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan City, China
| | - Jianwen Long
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan City, China
| | - Bo Zhang
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan City, China
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12
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Yao J, Wu XY, Yu Q, Yang SF, Yuan J, Zhang ZQ, Xue JS, Jiang Q, Chen MB, Xue GH, Cao C. The requirement of phosphoenolpyruvate carboxykinase 1 for angiogenesis in vitro and in vivo. SCIENCE ADVANCES 2022; 8:eabn6928. [PMID: 35622925 PMCID: PMC9140980 DOI: 10.1126/sciadv.abn6928] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 04/12/2022] [Indexed: 05/23/2023]
Abstract
We here examined the potential biological function of phosphoenolpyruvate carboxykinase 1 (PCK1) in angiogenesis. shRNA- or CRISPR-Cas9-induced PCK1 depletion potently inhibited endothelial cell proliferation, migration, sprouting, and tube formation, whereas ectopic PCK1 overexpression exerted opposite activity. In HUVECs, Gαi3 expression and Akt activation were decreased following PCK1 depletion, but were augmented by ectopic PCK1 overexpression. In vivo, retinal expression of PCK1 gradually increased from postnatal day 1 (P1) to P5. The intravitreous injection of endothelial-specific PCK1 shRNA adenovirus at P1 potently inhibited the radial extension of vascular plexus at P5. Conditional endothelial knockdown of PCK1 in adult mouse retina increased vascular leakage and the number of acellular capillaries while decreasing the number of RGCs in murine retinas. In diabetic retinopathy patients, PCK1 mRNA and protein levels were up-regulated in retinal tissues. Together, PCK1 is essential for angiogenesis possibly by mediating Gαi3 expression and Akt activation.
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Affiliation(s)
- Jin Yao
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Xin-yuan Wu
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Qing Yu
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Shuo-fei Yang
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Jin Yuan
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Zhi-qing Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Jin-song Xue
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Qin Jiang
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Min-bin Chen
- Department of Radiotherapy and Oncology, Affiliated Kunshan Hospital of Jiangsu University, Kunshan, China
| | - Guan-hua Xue
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Cong Cao
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
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13
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Wang X, Gao Y, Sun X. Effect of Taspine hydrochloride on the repair of rat skin wounds by regulating keratinocyte growth factor signal. Bioengineered 2021; 13:789-799. [PMID: 34898359 PMCID: PMC8805989 DOI: 10.1080/21655979.2021.2012920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
To explore the regulation of keratinocyte growth factor (KGF) in the process of repairing rat skin wounds by taspine hydrochloride (TA/HCl), 45 male Sprague-Dawley (SD) rats were purchased and divided into an experimental group, a dimethyl sulfoxide (DMSO) control group, and a basic fibroblast growth factor (bFGF) control group, each with 15 only. A back trauma model was innovatively adopted to prevent rats from biting and contaminating. The wound healing time and healing rate of the rat, and the Hydroxyproline (Hyp) and KGF expressions were observed. Morphological changes of wound tissue and the number of capillaries were observed after hematoxylin-eosin (HE) staining. The results showed that wound healing rate of experimental group and bFGF group was significantly higher than that of DMSO group (P < 0.05) after 2–15 days, and wound healing time of experimental group was 18 days, which was significantly lower than that of the DMSO group (P < 0.05). Expression levels of Hyp and KGF in the granulation tissue of rats in the experimental group were much higher than those in the DMSO control group after trauma (P < 0.05). In early stage of wound tissue repair, the number of new capillaries formed in experimental group was significantly higher than that in DMSO control group (P < 0.05). In summary, this study innovatively focused on KGF. The mechanism of TA/HCL promoting rat skin wound healing was closely related to KGF.
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Affiliation(s)
- Xiumei Wang
- Department of Dermatology, Liaocheng People's Hospital, Liaocheng, China
| | - Yang Gao
- Department of Plastic & Cosmetic Surgery, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaochen Sun
- Department of Dermatology, People's Hospital of Lixia District of Jinan, Jinan, China
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14
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Liu X, Bai M, Sun Y, Hu X, Wang C, Xie J, Ye L. FGF7-induced E11 facilitates cell-cell communication through connexin43. Int J Biol Sci 2021; 17:3862-3874. [PMID: 34671204 PMCID: PMC8495393 DOI: 10.7150/ijbs.65240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 08/26/2021] [Indexed: 02/05/2023] Open
Abstract
Fibroblast growth factors (FGFs) include a large family of growth factors that play a critical role in maintaining bone homeostasis, but the specific role of its members such as FGF7 does not well understand. Osteoblasts are a kind of major cells essential for bone formation. Osteoblasts interact with one another to create the unique structure of osteons. The well-connected osteons constitute the cortical bone. As an early osteocyte marker that triggers actin cytoskeleton dynamics, E11 is essential for osteoblasts' dendrites formation. However, the upstream which regulates E11 is mainly unknown. The purpose of this study was to examine the influence of FGF7 on the expression and the distribution of E11 in osteoblasts, which mediated osteoblasts' processes formation and gap junctional intercellular communication (GJIC) partly through connexin43 (Cx43). We first demonstrated that FGF7 increased the expression of E11 in osteoblasts. We then showed that FGF7 promoted osteoblasts' dendrites elongation and functional gap junctions formation. Furthermore, E11 interacted directly with Cx43 in primary osteoblasts. MAPK pathway and PI3K-AKT pathway were involved in the effect of FGF7. Our results shed light on the unique role of FGF7 on osteoblasts, which may indicate that FGF7 plays a more significant role in the later stages of bone development and homeostasis.
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Affiliation(s)
- Xiaoyu Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Mingru Bai
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yimin Sun
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xuchen Hu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Chenglin Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Jing Xie
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Ling Ye
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
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15
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Sun Y, Xie J, Cai S, Wang Q, Feng Z, Li Y, Lu JJ, Chen W, Ye Z. Elevated expression of nuclear receptor-binding SET domain 3 promotes pancreatic cancer cell growth. Cell Death Dis 2021; 12:913. [PMID: 34615858 PMCID: PMC8494902 DOI: 10.1038/s41419-021-04205-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 09/13/2021] [Accepted: 09/22/2021] [Indexed: 12/28/2022]
Abstract
The nuclear receptor-binding SET domain 3 (NSD3) catalyzes methylation of histone H3 at lysine 36 (H3K36), and promotes malignant transformation and progression of human cancer. Its expression, potential functions and underlying mechanisms in pancreatic cancer are studied. Bioinformatics studies and results from local human tissues show that NSD3 is upregulated in human pancreatic cancer tissues, which is correlated with poor overall survival. In primary and established pancreatic cancer cells, NSD3 silencing (by shRNAs) or CRISPR/Cas9-induced NSD3 knockout potently inhibited cell proliferation, migration and invasion, while provoking cell cycle arrest and apoptosis. Conversely, ectopic expression of NSD3-T1232A mutation significantly accelerated proliferation, migration, and invasion of pancreatic cancer cells. H3K36 dimethylation, expression of NSD3-dependent genes (Prkaa2, Myc, Irgm1, Adam12, and Notch3), and mTOR activation (S6K1 phosphorylation) were largely inhibited by NSD3 silencing or knockout. In vivo, intratumoral injection of adeno-associated virus (AAV)-packed NSD3 shRNA potently inhibited pancreatic cancer xenograft growth in nude mice. These results suggest that elevated NSD3 could be an important driver for the malignant progression of pancreatic cancer.
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Affiliation(s)
- Yihui Sun
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Jiaming Xie
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Shang Cai
- Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Qian Wang
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Zhenyu Feng
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Yecheng Li
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Jing-Jing Lu
- Department of Radiotherapy and Oncology, Affiliated Kunshan Hospital of Jiangsu University, Kunshan, China.
| | - Wei Chen
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China.
| | - Zhenyu Ye
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China.
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16
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Duah M, Li L, Shen J, Lan Q, Pan B, Xu K. Thymus Degeneration and Regeneration. Front Immunol 2021; 12:706244. [PMID: 34539637 PMCID: PMC8442952 DOI: 10.3389/fimmu.2021.706244] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/16/2021] [Indexed: 01/08/2023] Open
Abstract
The immune system’s ability to resist the invasion of foreign pathogens and the tolerance to self-antigens are primarily centered on the efficient functions of the various subsets of T lymphocytes. As the primary organ of thymopoiesis, the thymus performs a crucial role in generating a self-tolerant but diverse repertoire of T cell receptors and peripheral T cell pool, with the capacity to recognize a wide variety of antigens and for the surveillance of malignancies. However, cells in the thymus are fragile and sensitive to changes in the external environment and acute insults such as infections, chemo- and radiation-therapy, resulting in thymic injury and degeneration. Though the thymus has the capacity to self-regenerate, it is often insufficient to reconstitute an intact thymic function. Thymic dysfunction leads to an increased risk of opportunistic infections, tumor relapse, autoimmunity, and adverse clinical outcome. Thus, exploiting the mechanism of thymic regeneration would provide new therapeutic options for these settings. This review summarizes the thymus’s development, factors causing thymic injury, and the strategies for improving thymus regeneration.
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Affiliation(s)
- Maxwell Duah
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou Medical University, Xuzhou, China.,Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Lingling Li
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou Medical University, Xuzhou, China.,Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Jingyi Shen
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou Medical University, Xuzhou, China.,Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Qiu Lan
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou Medical University, Xuzhou, China.,Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Bin Pan
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou Medical University, Xuzhou, China.,Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Kailin Xu
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou Medical University, Xuzhou, China.,Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
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17
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Nůsková H, Serebryakova MV, Ferrer-Caelles A, Sachsenheimer T, Lüchtenborg C, Miller AK, Brügger B, Kordyukova LV, Teleman AA. Stearic acid blunts growth-factor signaling via oleoylation of GNAI proteins. Nat Commun 2021; 12:4590. [PMID: 34321466 PMCID: PMC8319428 DOI: 10.1038/s41467-021-24844-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 07/08/2021] [Indexed: 01/13/2023] Open
Abstract
Covalent attachment of C16:0 to proteins (palmitoylation) regulates protein function. Proteins are also S-acylated by other fatty acids including C18:0. Whether protein acylation with different fatty acids has different functional outcomes is not well studied. We show here that C18:0 (stearate) and C18:1 (oleate) compete with C16:0 to S-acylate Cys3 of GNAI proteins. C18:0 becomes desaturated so that C18:0 and C18:1 both cause S-oleoylation of GNAI. Exposure of cells to C16:0 or C18:0 shifts GNAI acylation towards palmitoylation or oleoylation, respectively. Oleoylation causes GNAI proteins to shift out of cell membrane detergent-resistant fractions where they potentiate EGFR signaling. Consequently, exposure of cells to C18:0 reduces recruitment of Gab1 to EGFR and reduces AKT activation. This provides a molecular mechanism for the anti-tumor effects of C18:0, uncovers a mechanistic link how metabolites affect cell signaling, and provides evidence that the identity of the fatty acid acylating a protein can have functional consequences.
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Affiliation(s)
- Hana Nůsková
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Heidelberg University, Heidelberg, Germany
| | - Marina V Serebryakova
- A.N. Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Anna Ferrer-Caelles
- German Cancer Research Center (DKFZ), Heidelberg, Germany
- Heidelberg University, Heidelberg, Germany
| | | | | | - Aubry K Miller
- German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Britta Brügger
- Heidelberg University Biochemistry Center (BZH), Heidelberg, Germany
| | - Larisa V Kordyukova
- A.N. Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Aurelio A Teleman
- German Cancer Research Center (DKFZ), Heidelberg, Germany.
- Heidelberg University, Heidelberg, Germany.
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18
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Wang Y, Liu YY, Chen MB, Cheng KW, Qi LN, Zhang ZQ, Peng Y, Li KR, Liu F, Chen G, Cao C. Neuronal-driven glioma growth requires Gαi1 and Gαi3. Theranostics 2021; 11:8535-8549. [PMID: 34373757 PMCID: PMC8343996 DOI: 10.7150/thno.61452] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 07/08/2021] [Indexed: 12/17/2022] Open
Abstract
Neuroligin-3 (NLGN3) is necessary and sufficient to promote glioma cell growth. The recruitment of Gαi1/3 to the ligand-activated receptor tyrosine kinases (RTKs) is essential for mediating oncogenic signaling. Methods: Various genetic strategies were utilized to examine the requirement of Gαi1/3 in NLGN3-driven glioma cell growth. Results: NLGN3-induced Akt-mTORC1 and Erk activation was inhibited by decreasing Gαi1/3 expression. In contrast ectopic Gαi1/3 overexpression enhanced NLGN3-induced signaling. In glioma cells, NLGN3-induced cell growth, proliferation and migration were attenuated by Gαi1/3 depletion with shRNA, but facilitated with Gαi1/3 overexpression. Significantly, Gαi1/3 silencing inhibited orthotopic growth of patient-derived glioma xenografts in mouse brain, whereas forced Gαi1/3-overexpression in primary glioma xenografts significantly enhanced growth. The growth of brain-metastatic human lung cancer cells in mouse brain was largely inhibited with Gαi1/3 silencing. It was however expedited with ectopic Gαi1/3 overexpression. In human glioma Gαi3 upregulation was detected, correlating with poor prognosis. Conclusion: Gαi1/3 mediation of NLGN3-induced signaling is essential for neuronal-driven glioma growth.
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19
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Zheng YH, Yang JJ, Tang PJ, Zhu Y, Chen Z, She C, Chen G, Cao P, Xu XY. A novel Keap1 inhibitor iKeap1 activates Nrf2 signaling and ameliorates hydrogen peroxide-induced oxidative injury and apoptosis in osteoblasts. Cell Death Dis 2021; 12:679. [PMID: 34226516 PMCID: PMC8257690 DOI: 10.1038/s41419-021-03962-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/16/2021] [Accepted: 06/22/2021] [Indexed: 02/08/2023]
Abstract
An ultra-large structure-based virtual screening has discovered iKeap1 as a direct Keap1 inhibitor that can efficiently activate Nrf2 signaling. We here tested its potential effect against hydrogen peroxide (H2O2)-induced oxidative injury in osteoblasts. In primary murine and human osteoblasts, iKeap1 robustly activated Nrf2 signaling at micromole concentrations. iKeap1 disrupted Keap1-Nrf2 association, causing Nrf2 protein stabilization, cytosol accumulation and nuclear translocation in murine and human osteoblasts. The anti-oxidant response elements (ARE) activity and transcription of Nrf2-ARE-dependent genes (including HO1, NQO1 and GCLC) were increased as well. Significantly, iKeap1 pretreatment largely ameliorated H2O2-induced reactive oxygen species production, lipid peroxidation and DNA damage as well as cell apoptosis and programmed necrosis in osteoblasts. Moreover, dexamethasone- and nicotine-induced oxidative injury and apoptosis were alleviated by iKeap1. Importantly, Nrf2 shRNA or CRISPR/Cas9-induced Nrf2 knockout completely abolished iKeap1-induced osteoblast cytoprotection against H2O2. Conversely, CRISPR/Cas9-induced Keap1 knockout induced Nrf2 cascade activation and mimicked iKeap1-induced cytoprotective actions in murine osteoblasts. iKeap1 was ineffective against H2O2 in the Keap1-knockout murine osteoblasts. Collectively, iKeap1 activated Nrf2 signaling cascade to inhibit H2O2-induced oxidative injury and death of osteoblasts.
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Affiliation(s)
- Yue-huan Zheng
- grid.16821.3c0000 0004 0368 8293Department of Orthopedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jian-jun Yang
- grid.412538.90000 0004 0527 0050Department of Orthopedics, Tenth People’s Hospital of Tongji University, Shanghai, China
| | - Pei-jun Tang
- grid.490559.4Department of Pulmonary, The Affiliated Infectious Diseases Hospital of Soochow University, The Fifth People’s Hospital of Suzhou, Suzhou, China
| | - Yuan Zhu
- grid.16821.3c0000 0004 0368 8293Department of Orthopedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhe Chen
- grid.16821.3c0000 0004 0368 8293Department of Orthopedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chang She
- grid.452666.50000 0004 1762 8363Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Gang Chen
- grid.16821.3c0000 0004 0368 8293Department of Orthopedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Peng Cao
- grid.16821.3c0000 0004 0368 8293Department of Orthopedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiang-yang Xu
- grid.16821.3c0000 0004 0368 8293Department of Orthopedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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20
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Chen C, Meng Z, Ren H, Zhao N, Shang R, He W, Hao J. The molecular mechanisms supporting the homeostasis and activation of dendritic epidermal T cell and its role in promoting wound healing. BURNS & TRAUMA 2021; 9:tkab009. [PMID: 34212060 PMCID: PMC8240510 DOI: 10.1093/burnst/tkab009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 03/08/2021] [Indexed: 11/13/2022]
Abstract
The epidermis is the outermost layer of skin and the first barrier against invasion. Dendritic epidermal T cells (DETCs) are a subset of γδ T cells and an important component of the epidermal immune microenvironment. DETCs are involved in skin wound healing, malignancy and autoimmune diseases. DETCs secrete insulin-like growth factor-1 and keratinocyte growth factor for skin homeostasis and re-epithelization and release inflammatory factors to adjust the inflammatory microenvironment of wound healing. Therefore, an understanding of their development, activation and correlative signalling pathways is indispensable for the regulation of DETCs to accelerate wound healing. Our review focuses on the above-mentioned molecular mechanisms to provide a general research framework to regulate and control the function of DETCs.
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Affiliation(s)
- Cheng Chen
- State Key Laboratory of Trauma, Burns, and Combined Injury, Institute of Burn Research, the First Affiliated Hospital of Army Medical University (the Third Military Medical University), Chongqing Key Laboratory for Disease Proteomics, Chongqing, 400038, China
| | - Ziyu Meng
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China
| | - He Ren
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin Medical University, Tianjin, 300052, China
| | - Na Zhao
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin Medical University, Tianjin, 300052, China
| | - Ruoyu Shang
- State Key Laboratory of Trauma, Burns, and Combined Injury, Institute of Burn Research, the First Affiliated Hospital of Army Medical University (the Third Military Medical University), Chongqing Key Laboratory for Disease Proteomics, Chongqing, 400038, China
| | - Weifeng He
- State Key Laboratory of Trauma, Burns, and Combined Injury, Institute of Burn Research, the First Affiliated Hospital of Army Medical University (the Third Military Medical University), Chongqing Key Laboratory for Disease Proteomics, Chongqing, 400038, China
| | - Jianlei Hao
- Zhuhai Institute of Translational Medicine, Zhuhai People's Hospital Affiliated with Jinan University, Jinan University, Zhuhai, 519000, Guangdong, China.,The Biomedical Translational Research Institute, Faculty of Medical Science, Jinan University, Guangzhou, 510632, Guangdong, China
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21
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Lv Y, Wang Y, Song Y, Wang SS, Cheng KW, Zhang ZQ, Yao J, Zhou LN, Ling ZY, Cao C. LncRNA PINK1-AS promotes Gαi1-driven gastric cancer tumorigenesis by sponging microRNA-200a. Oncogene 2021; 40:3826-3844. [PMID: 33958720 DOI: 10.1038/s41388-021-01812-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/07/2021] [Accepted: 04/21/2021] [Indexed: 02/03/2023]
Abstract
Gastric cancer (GC) is one of the leading causes of human mortality around the world. We have previously shown that Gαi1 (the inhibitory subunit 1 of the heterotrimeric guanine nucleotide-binding protein) recruitment to ligand-activated receptor tyrosine kinases (RTKs) is essential for signaling. Testing its role in GC cancer-promoting functions, we found that Gαi1 is upregulated in human GC, correlating with poor overall survival. In established and primary human GC cells, Gαi1 shRNA (small hairpin RNA) or knockout produced significant anti-GC cell activity, proliferation and migration was inhibited, and apoptosis was activated. Conversely, ectopic Gαi1 overexpression promoted proliferation and migration of GC cells in vitro. By examining the tumor-suppressive miRNA microRNA-200a (miR-200a), we found that miR-200a directly silenced Gαi1 to induce anti-GC cell activity. The expression of miR-200a was downregulated in human GC, correlating with upregulation of a novel miR-200a-targeting long non-coding RNA (LncRNA), PINK1 (PTEN Induced Kinase 1)-AS. RNA immunoprecipitation, RNA-pull down, and RNA fluorescence in situ hybridization assays confirmed that PINK1-AS directly binds to miR-200a. Silencing PINK1-AS in GC cells led to miR-200a accumulation, Gαi1 downregulation, and inhibition of GC cell progression in vitro, whereas PINK1-AS upregulation produced the converse results. Significantly, anti-GC cell activity induced by PINK1-AS shRNA was ameliorated by the expression of miR-200a antisense or the 3'-UTR (untranslated region)-depleted Gαi1. In vivo, the growth of subcutaneous MGC-803 xenografts in nude mice was inhibited by PINK1-AS shRNA, but accelerated by PINK1-AS overexpression. Patient-derived GC xenograft growth in nude mice was largely inhibited after intratumoral injection of PINK1-AS shRNA lentivirus. In conclusion, PINK1-AS promotes Gαi1-driven GC progression by sponging miR-200a.
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Affiliation(s)
- Yan Lv
- Center of Translational Medicine, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, China
| | - Yin Wang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Yu Song
- Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, China
| | - Shu-Sheng Wang
- Department of General Surgery, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, China
| | - Kai-Wen Cheng
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Zhi-Qing Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Jin Yao
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China.
| | - Li-Na Zhou
- Department of Radiotherapy and Oncology, Affiliated Kunshan Hospital of Jiangsu University, Kunshan, China.
| | - Zhuo-Yan Ling
- Department of Orthopedics, the Second Affiliated Hospital of Soochow University, Suzhou, China.
| | - Cong Cao
- Center of Translational Medicine, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, China. .,Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China. .,North District, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou, China.
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22
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HBO1 overexpression is important for hepatocellular carcinoma cell growth. Cell Death Dis 2021; 12:549. [PMID: 34039960 PMCID: PMC8155027 DOI: 10.1038/s41419-021-03818-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 04/24/2021] [Accepted: 04/26/2021] [Indexed: 12/19/2022]
Abstract
Hepatocellular carcinoma (HCC) is a common primary liver malignancy lacking effective molecularly-targeted therapies. HBO1 (lysine acetyltransferase 7/KAT7) is a member of MYST histone acetyltransferase family. Its expression and potential function in HCC are studied. We show that HBO1 mRNA and protein expression is elevated in human HCC tissues and HCC cells. HBO1 expression is however low in cancer-surrounding normal liver tissues and hepatocytes. In HepG2 and primary human HCC cells, shRNA-induced HBO1 silencing or CRISPR/Cas9-induced HBO1 knockout potently inhibited cell viability, proliferation, migration, and invasion, while provoking mitochondrial depolarization and apoptosis induction. Conversely, ectopic overexpression of HBO1 by a lentiviral construct augmented HCC cell proliferation, migration and invasion. In vivo, xenografts-bearing HBO1-KO HCC cells grew significantly slower than xenografts with control HCC cells in severe combined immunodeficient mice. These results suggest HBO1 overexpression is important for HCC cell progression.
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23
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Chen Z, Zhang Y, Wu X, Zhang J, Xu W, Shen C, Zheng B. Gαi1 Promoted Proliferation, Migration and Invasion via Activating the Akt-mTOR/Erk-MAPK Signaling Pathway in Renal Cell Carcinoma. Onco Targets Ther 2021; 14:2941-2952. [PMID: 33976552 PMCID: PMC8106533 DOI: 10.2147/ott.s298102] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/08/2021] [Indexed: 12/15/2022] Open
Abstract
Background Renal cell carcinoma (RCC) accounts for about 2-3% of all adult malignancies. G protein alpha inhibitory subunit 1 (Gαi1) plays a key role in mediating PI3K-Akt signaling upon activation of receptor tyrosine kinases (RTKs). However, little is known about its expression, regulation and biological function in RCC. Methods Gαi1 expression in RCC tissues and cells was detected by quantitative real-time PCR (qRT-PCR), Western blot and immunohistochemistry (IHC). The effect of Gαi1 silence on cell proliferation and apoptosis of 786-O and ACHN cells was detected by CCK-8 assay and flow cytometry. Wound-healing assay and Transwell assays were used to detect the cell invasion in RCC cells. The expression of CDK4, cyclin D1, MMP-2, MMP-9, Bax, Bcl-2, p/t-Akt, p/t-S6 and p/t-Erk was detected by Western blot and qRT-PCR. Furthermore, a nude mouse subcutaneous xenograft model was used to further evaluate the potential effects of Gail in vivo. Results In the present study, our data showed that Gαi1 expression was dramatically increased in RCC tissues compared with normal renal tissues. In addition, knocking down the expression of Gαi1 subsequently inhibited proliferation, migration and invasion of RCC cells in vivo and vitro. Furthermore, the expression of CDK4, cyclin D1, MMP-2 and MMP-9 was significantly reduced upon Gαi1 inhibition. Gαi1 positively regulates the activation of the mTOR and Erk pathways. Conclusion In conclusion, this study reveals Gαi1 promoted proliferation via activating the Akt-mTOR and Erk-MAPK signaling pathways in RCC, and Gαi1 may be a therapeutic and prognostic target for RCC.
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Affiliation(s)
- Zhan Chen
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China.,Medical Research Center, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Yong Zhang
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China.,Medical Research Center, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Xiang Wu
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Ji Zhang
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Wei Xu
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China.,Medical Research Center, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Cheng Shen
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China.,Medical Research Center, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Bing Zheng
- Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, People's Republic of China
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24
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Bai JY, Li Y, Xue GH, Li KR, Zheng YF, Zhang ZQ, Jiang Q, Liu YY, Zhou XZ, Cao C. Requirement of Gαi1 and Gαi3 in interleukin-4-induced signaling, macrophage M2 polarization and allergic asthma response. Theranostics 2021; 11:4894-4909. [PMID: 33754034 PMCID: PMC7978294 DOI: 10.7150/thno.56383] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/28/2021] [Indexed: 12/12/2022] Open
Abstract
IL-4 induces Akt activation in macrophages, required for full M2 (alternative) polarization. We examined the roles of Gαi1 and Gαi3 in M2 polarization using multiple genetic methods. Methods and Results: In MEFs and primary murine BMDMs, Gαi1/3 shRNA, knockout or dominant negative mutations attenuated IL-4-induced IL4Rα endocytosis, Gab1 recruitment as well as Akt activation, leaving STAT6 signaling unaffected. Following IL-4 stimulation, Gαi1/3 proteins associated with the intracellular domain of IL-4Rα and the APPL1 adaptor, to mediate IL-4Rα endosomal traffic and Gab1-Akt activation in BMDMs. In contrast, gene silencing of Gαi1/3 with shRNA or knockout resulted in BMDMs that were refractory to IL-4-induced M2 polarization. Conversely, Gαi1/3-overexpressed BMDMs displayed preferred M2 response with IL-4 stimulation. In primary human macrophages IL-4-induced Akt activation and Th2 genes expression were inhibited with Gαi1/3 silencing, but augmented with Gαi1/3 overexpression. In Gαi1/3 double knockout (DKO) mice, M2 polarization, by injection of IL-4 complex or chitin, was potently inhibited. Moreover, in a murine model of asthma, ovalbumin-induced airway inflammation and hyperresponsiveness were largely impaired in Gαi1/3 DKO mice. Conclusion: These findings highlight novel and essential roles for Gαi1/3 in regulating IL-4-induced signaling, macrophage M2 polarization and allergic asthma response.
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25
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He Q, Liu N, Hu F, Shi Q, Pi X, Chen H, Li J, Zhang B. Circ_0061012 contributes to IL-22-induced proliferation, migration and invasion in keratinocytes through miR-194-5p/GAB1 axis in psoriasis. Biosci Rep 2021; 41:BSR20203130. [PMID: 33393621 PMCID: PMC7809556 DOI: 10.1042/bsr20203130] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 12/28/2022] Open
Abstract
Psoriasis is a chronic inflammation-associated skin disorder featured by excessive proliferation and abnormal differentiation of keratinocytes. Here, we intended to investigate the role of circular RNA 0061012 (circ_0061012) in psoriasis progression. The expression of circ_0061012, SLMO2-ATP5E readthrough (SLMO2-ATP5E) messenger RNA (mRNA), microRNA-194-5p (miR-194-5p) and GRB2 associated binding protein 1 (GAB1) mRNA was determined by quantitative real-time polymerase chain reaction (qRT-PCR). Cell proliferation and metastasis were analyzed by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and transwell assays. Western blot assay was used to measure the protein levels of Ki67, matrix metallopeptidase 9 (MMP9) and GAB1. Dual-luciferase reporter assay and RNA immune co-precipitation (RIP) assay were used to verify the interaction between miR-194-5p and circ_0061012 or GAB1. Circ_0061012 abundance was significantly enhanced in lesional skin samples from psoriasis patients than that in normal skin specimens from healthy volunteers. Interleukin-22 (IL-22) treatment increased the expression of circ_0061012 in a dose-dependent manner. Circ_0061012 silencing alleviated IL-22-induced promoting effects in the proliferation, migration and invasion of HaCaT cells. Circ_0061012 interacted with miR-194-5p, and miR-194-5p knockdown counteracted circ_0061012 silencing-mediated influences in IL-22-induced HaCaT cells. GAB1 was a target of miR-194-5p in HaCaT cells, and miR-194-5p hampered proliferation and metastasis which were induced by IL-22 partly through targeting GAB1. Circ_0061012 elevated the expression of GAB1 through sponging miR-194-5p in HaCaT cells. Circ_0061012 accelerated IL-22-induced proliferation and metastasis in HaCaT cells through enhancing GAB1 expression via sponging miR-194-5p in psoriasis.
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Affiliation(s)
- Qi He
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei, China
| | - Nian Liu
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Feng Hu
- Department of Dermatology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Quan Shi
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei, China
| | - Xianming Pi
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei, China
| | - Hongxiang Chen
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jiawen Li
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Bo Zhang
- Department of Dermatology, Hubei Provincial Hospital of Traditional Chinese Medicine, Hubei Province Academy of Traditional Chinese Medicine, Wuhan, Hubei, China
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26
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Tang Z, Ding J, Zhai X, Jing M, Guan Z, Li Y. MicroRNA-21 may be involved in the therapeutic effects of Galla chinensis ointment on keloid. J Int Med Res 2020; 48:300060520909602. [PMID: 32216491 PMCID: PMC7133421 DOI: 10.1177/0300060520909602] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Objective Galla chinensis ointment can inhibit the proliferation of keloid fibroblasts and decrease keloid formation. We investigated whether Galla chinensis ointment inhibits keloid fibroblast proliferation through expression of microRNA-21, phosphorylated (p)-phosphatidylinositol 3-kinase (p-PI3K), chromosome 10 neutropenic protein phosphatase (PTEN), protein kinase B (p-Akt), and mammalian target of rapamycin (p-mTOR). Methods A keloid mouse model and human keloid-derived fibroblasts were developed and treated with Galla chinensis. Immunohistochemistry, western blot, and reverse transcription-PCR were used to detect miR-21, PI3K, PTEN, Akt, and mTOR in keloid tissues. Results p-Akt and p-mTOR were highly expressed in the control group, PTEN was highly expressed in the treatment group, and p-PI3K was highly expressed in keloid tissue in both groups. Galla chinensis reduced miR-21 expression and increased PTEN mRNA expression in keloid fibroblasts compared with the control group, resulting in increased PTEN protein and decreased p-Akt and p-mTOR protein. Galla chinensis had no effect on p-PI3K. Conclusion Galla chinensis might inhibit proliferation of keloid fibroblasts by upregulating PTEN, thus inhibiting expression of miR-21 and downregulating p-Akt and p-mTOR expression. These results confirm the effect of Galla chinensis ointment on fibroblasts and suggest that it could be used to manage keloids clinically.
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Affiliation(s)
- Zhiming Tang
- The First Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
- Department of Dermatology, Xuzhou Hospital affiliated with Nanjing University of Traditional Chinese Medicine, Xuzhou, China
| | - Jicun Ding
- Department of Burns and Plastic Surgery, Xuzhou Central Hospital, Xuzhou, China
| | - Xiaoxiang Zhai
- Department of Dermatology, Shanghai Seventh People’s Hospital, Shanghai, China
- Xiaoxiang Zhai, Department of Dermatology, Shanghai Seventh People’s Hospital, No. 358 Datong Road, Gaoqiao, Pudong New Area, Shanghai 200137, China.
| | - Mengqing Jing
- Department of Dermatology, Xuzhou Hospital affiliated with Nanjing University of Traditional Chinese Medicine, Xuzhou, China
| | - Zhiqiang Guan
- Department of Dermatology, Xuzhou First People’s Hospital, Xuzhou, China
| | - Yongcong Li
- Department of Dermatology, Xuzhou Hospital affiliated with Nanjing University of Traditional Chinese Medicine, Xuzhou, China
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Zhang W, Zhu Y, Chen J, Wang J, Yao C, Chen C. Mechanisms of miR‑128‑3p in inhibiting osteoblast differentiation from bone marrow‑derived mesenchymal stromal cells. Mol Med Rep 2020; 22:5041-5052. [PMID: 33174052 PMCID: PMC7646956 DOI: 10.3892/mmr.2020.11600] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 05/27/2020] [Indexed: 11/21/2022] Open
Abstract
The authors' previous study demonstrated that miR-128 may exert an inhibitory effect on the osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BM-MSCs), but its downstream mechanisms remain to be elucidated. The aim of the present study was to investigate the microRNA (miRNA/miR) and mRNA profiles of differentiated and undifferentiated BM-MSCs and explore new downstream targets for miR-128. The sequencing datasets of GSE107279 (miRNA) and GSE112318 (mRNA) were downloaded from the Gene Expression Omnibus database. The differentially expressed miRNAs (DEMs) and genes (DEGs) were identified using the DESeq2 method. The target genes of DEMs were predicted by the miRwalk 2.0 database. The hub target genes of miR-128 were screened by constructing the protein-protein interaction (PPI) network and module analysis. The expression levels of miR-128 and crucial target genes were validated by reverse transcription-quantitative (RT-q) PCR before or after transfection of miR-128 mimics to BM-MSCs. The miRNA expression profile analysis identified miR-128 as one of the significantly downregulated DEMs (total 338) in differentiated BM-MSCs compared with the undifferentiated control. A total of 103 predicted target genes of miR-128-3p were overlapped with upregulated DEGs. By calculating the topological properties of each protein in the PPI network, 6 upregulated genes (KIT, NTRK2, YWHAB, GAB1, AXIN1 and RUNX1; fold change was the highest for NTRK2) were considered to be hub genes. Of these, 4 were enriched in module 4 (RUNX1, KIT, GAB1 and AXIN1; RUNX1 was particularly crucial as it can interact with the others), while one was enriched in module 7 (YWHAB). The expression levels of miR-128 and these 6 target genes during the osteogenic differentiation were experimentally confirmed by RT-qPCR. In addition, the expression levels of these 6 genes were significantly reversed after transfection of miR-128-3p mimics into rat BM-MSCs compared with the miR-control group. These findings indicated that miR-128-3p may inhibit the osteoblast differentiation of BM-MSCs by downregulation of these 6 genes, particularly RUNX1, YWHAB and NTRK2.
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Affiliation(s)
- Wen Zhang
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Yu Zhu
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Junsheng Chen
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Jiaxing Wang
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Chen Yao
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Chen Chen
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, P.R. China
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28
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Four-octyl itaconate activates Nrf2 cascade to protect osteoblasts from hydrogen peroxide-induced oxidative injury. Cell Death Dis 2020; 11:772. [PMID: 32943614 PMCID: PMC7499214 DOI: 10.1038/s41419-020-02987-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 02/07/2023]
Abstract
Four-octyl itaconate (4-OI) is the cell-permeable derivative of itaconate that can activate Nrf2 signaling by alkylating Keap1’s cysteine residues. Here, we tested the potential effect of 4-OI on hydrogen peroxide (H2O2)-induced oxidative injury in osteoblasts. In OB-6 cells and primary murine osteoblasts, 4-OI was able to activate Nrf2 signaling cascade and cause Keap1–Nrf2 disassociation, Nrf2 protein stabilization, cytosol accumulation, and nuclear translocation. 4-OI also augmented antioxidant-response element reporter activity and promoted expression of Nrf2-dependent genes (HO1, NQO1, and GCLC). Pretreatment with 4-OI inhibited H2O2-induced reactive oxygen species production, cell death, and apoptosis in osteoblasts. Furthermore, 4-OI inhibited H2O2-induced programmed necrosis by suppressing mitochondrial depolarization, mitochondrial cyclophilin D-ANT1 (adenine nucleotide translocase 1)-p53 association, and cytosol lactate dehydrogenase release in osteoblasts. Ectopic overexpression of immunoresponsive gene 1 (IRG1) increased endogenous itaconate production and activated Nrf2 signaling cascade, thereby inhibiting H2O2-induced oxidative injury and cell death. In OB-6 cells, Nrf2 silencing or CRISPR/Cas9-induced Nrf2 knockout blocked 4-OI-induced osteoblast cytoprotection against H2O2. Conversely, forced Nrf2 activation, by CRISPR/Cas9-induced Keap1 knockout, mimicked 4-OI-induced actions in OB-6 cells. Importantly, 4-OI was ineffective against H2O2 in Keap1-knockout cells. Collectively, 4-OI efficiently activates Nrf2 signaling to inhibit H2O2-induced oxidative injury and death of osteoblasts.
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29
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Liu T, Zhang X, Wang Y. miR-183-3p suppresses proliferation and migration of keratinocyte in psoriasis by inhibiting GAB1. Hereditas 2020; 157:28. [PMID: 32650835 PMCID: PMC7353791 DOI: 10.1186/s41065-020-00138-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 06/30/2020] [Indexed: 12/14/2022] Open
Abstract
Background MicroRNAs (miRNAs) target genes involved in the hyperproliferation of keratinocytes or immune dysfunction of psoriasis. This study prospectively determined the involvement of miR-183-3p in the pathogenesis of psoriasis. Methods Differentially expressed miR-183-3p between psoriatic lesional and non-lesional skin were determined by quantitative RT-PCR and in situ hybridization (ISH). CCK8 and wound healing assays were performed to assess cell viability and migration of human keratinocyte cell line (HaCaT). The target of miR-183-3p was validated by luciferase activity assay. Results Lower miR-183-3p expression was observed in psoriatic lesional skin compared to psoriatic non-lesional skin. MiR-183-3p over-expression inhibited the viability and migration of HaCaT cells, while inhibition of miR-183-3p promoted the viability and migration of HaCaT cells. Moreover, miR-183-3p could bind to the 3′ UTR of GAB1 (growth factor receptor binding 2-associated binding protein 1) and decrease the mRNA and protein expression of GAB1 in HaCaT cells. In addition, higher GAB1 expression was observed in psoriatic lesional skin than psoriatic non-lesional skin. Conclusion MiR-183-3p exhibited inhibition property in the proliferation and migration of HaCaT cells via down-regulation of GAB1, suggesting the potential therapeutic strategy for psoriasis.
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Affiliation(s)
- Ting Liu
- Department of Dermatology, Affiliated Hospital of North Sichuan Medical College, No. 1, Maoyuan South Road, Nanchong City, 637000, Sichuan Province, China.
| | - Xiaoyan Zhang
- Department of Dermatology, Affiliated Hospital of North Sichuan Medical College, No. 1, Maoyuan South Road, Nanchong City, 637000, Sichuan Province, China
| | - Yujuan Wang
- Department of Dermatology, Affiliated Hospital of North Sichuan Medical College, No. 1, Maoyuan South Road, Nanchong City, 637000, Sichuan Province, China
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30
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Li S, Tang Q, Xu H, Huang Q, Wen Z, Liu Y, Peng C. Improved stability of KGF by conjugation with gold nanoparticles for diabetic wound therapy. Nanomedicine (Lond) 2019; 14:2909-2923. [PMID: 31791171 DOI: 10.2217/nnm-2018-0487] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Aim: Diabetic wound healing is seriously interrupted, and administration of KGF for wound treatment is restricted by its inherent instability. We aim to develop an ideal way toward KGF stabilization, thus improving diabetic wound healing. Materials & methods: We conjugated KGF with gold nanoparticles (GNPs) and determined the stability and binding affinity. Biological effects of conjugates (KGF-GNPs) were evaluated in vitro and in an animal model. Results: KGF-GNPs revealed high stability under hostile circumstances because of the preserved secondary structure and possessed elevated binding affinity to KGF receptor. Moreover, application of KGF-GNPs contributed to accelerated wound recovery in diabetic rats, including re-epithelialization and contraction. Conclusion: KGF-GNPs were promising for future clinical application for diabetic wound therapy.
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Affiliation(s)
- Shuaihua Li
- Department of Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan, PR China.,Department of Cosmetic & Plastic Surgery, The First People's Hospital of Chenzhou, Chenzhou 423000, Hunan, PR China
| | - Qiyu Tang
- Department of Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan, PR China.,Center for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, PR China
| | - Hongbo Xu
- Department of General Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan, PR China
| | - Qiangru Huang
- Department of Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan, PR China
| | - Zi Wen
- Department of Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan, PR China
| | - Yawei Liu
- Department of Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan, PR China
| | - Cheng Peng
- Department of Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan, PR China
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31
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He Y, Li C, Xu H, Duan Z, Liu Y, Zeng R, Li M, Wang B. AKT‐dependent hyperproliferation of keratinocytes in familial hidradenitis suppurativa with a
NCSTN
mutation: a potential role of defective miR‐100‐5p. Br J Dermatol 2019; 182:500-502. [DOI: 10.1111/bjd.18460] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Y. He
- Institute of Dermatology Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China
| | - C. Li
- Institute of Dermatology Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China
| | - H. Xu
- Institute of Dermatology Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China
| | - Z. Duan
- Institute of Dermatology Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China
| | - Y. Liu
- Institute of Dermatology Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China
| | - R. Zeng
- Institute of Dermatology Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China
| | - M. Li
- Institute of Dermatology Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China
| | - B. Wang
- Institute of Dermatology Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing Jiangsu 210042 China
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Xu XZ, Tang Y, Cheng LB, Yao J, Jiang Q, Li KR, Zhen YF. Targeting Keap1 by miR-626 protects retinal pigment epithelium cells from oxidative injury by activating Nrf2 signaling. Free Radic Biol Med 2019; 143:387-396. [PMID: 31446056 DOI: 10.1016/j.freeradbiomed.2019.08.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/09/2019] [Accepted: 08/21/2019] [Indexed: 11/19/2022]
Abstract
Activation of the NF-E2-related factor 2 (Nrf2) cascade can offer significant protection against oxidative stress in retinal pigment epithelium (RPE) cells. Here, we identified a novel kelch-like ECH-associated protein 1 (Keap1)-targeting microRNA, microRNA-626 (miR-626) that activates Nrf2 signaling. In ARPE-19 cells and primary human RPE cells, ectopic overexpression of miR-626 targeting the 3'-UTR (3'-untranslated region) of Keap1 downregulated its expression, promoting Nrf2 protein stabilization and nuclear translocation, leading to expression of ARE-dependent genes (HO1, NOQ1 and GCLC). Functional studies showed that miR-626 protected RPE cells from hydrogen peroxide (H2O2)-induced oxidative injury. Conversely, miR-626 inhibition induced Keap1 upregulation and Nrf2 cascade inhibition, exacerbating oxidative injury in RPE cells. Further studies demonstrated that miR-626 was ineffective in Keap1-knockout or Nrf2-knockout RPE cells. Importantly, miR-626 also activated Keap1-Nrf2 signaling cascade in human lens epithelial cells (HLECs) and primary human retinal ganglion cells (RGCs), providing protection from H2O2. At last, we show that plasma miR-626 levels are significantly downregulated in age-related macular degeneration (AMD) patients than those in the healthy donors. We conclude that targeting Keap1 by miR-626 protects RPE cells and other ophthalmic cells from oxidative injury via activation of Nrf2 signaling cascade.
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Affiliation(s)
- Xiang-Zhong Xu
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Yu Tang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Li-Bo Cheng
- Department of Ophthalmology, Wuxi Second Hospital, Nanjing Medical University, Wu'xi, China
| | - Jin Yao
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Qin Jiang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China.
| | - Ke-Ran Li
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China.
| | - Yun-Fang Zhen
- The Center of Diagnosis and Treatment for Children's Bone Diseases, The Children's Hospital Affiliated to Soochow University, Suzhou, China.
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Chen ZJ, Rong L, Huang D, Jiang Q. Targeting cullin 3 by miR-601 activates Nrf2 signaling to protect retinal pigment epithelium cells from hydrogen peroxide. Biochem Biophys Res Commun 2019; 515:679-687. [PMID: 31178131 DOI: 10.1016/j.bbrc.2019.05.171] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 05/29/2019] [Indexed: 12/14/2022]
Abstract
Activation of Nrf2 cascade can protect retinal pigment epithelium (RPE) cells from hydrogen peroxide (H2O2) and other oxidative injury. The current study identified microRNA-601 (miR-601) as a novel cullin 3 (Cul3)-targeting miRNA that activates Nrf2 cascade. In ARPE-19 cells and primary human RPE cells, forced overexpression of miR-601 significantly inhibited Cul3 3'-UTR activity and downregulated Cul3 mRNA/protein expression, leading to Nrf2 protein stabilization and its nuclear translocation as well as expression of anti-oxidant response elements (ARE)-dependent genes (HO1, NQO1 and GCLC). H2O2 treatment increased miR-601 levels in RPE cells. Significantly, ectopic miR-601 overexpression attenuated H2O2-induced oxidative injury and apoptosis in RPE cells. In contrast, miR-601 inhibition promoted Cul3 expression, lowered basal Nrf2 activation, and enhanced H2O2-induced oxidative stress and apoptosis in RPE cells. In ARPE-19 cells, CRISPC/Cas9-mediated knockout (KO) of Cul3 or Keap1 not only mimicked, but also nullified, miR-601-inudced anti-H2O2 actions. Furthermore, Nrf2 silencing by targeted shRNAs abolished miR-601-inudced cytoprotection in H2O2-treated ARPE-19 cells. Taken together, we show that miR-601 activates Nrf2 signaling to protect RPE cells from H2O2 by targeting Cul3.
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Affiliation(s)
- Zhi-Jun Chen
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China; Department of Ophthalmology, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Ling Rong
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Dan Huang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Qin Jiang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China.
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Ye XT, Huang H, Huang WP, Hu WL. LncRNA THOR promotes human renal cell carcinoma cell growth. Biochem Biophys Res Commun 2019; 501:661-667. [PMID: 29752937 DOI: 10.1016/j.bbrc.2018.05.040] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 05/07/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Recent studies have characterized a novel but extremely conserved long non-coding RNA (LncRNA) THOR. THOR directly associates with insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1) to promote mRNA stabilization of key pro-cancerous genes. RESULTS Here, we show that THOR is expressed in human renal cell carcinoma (RCC) tissues and established/primary human RCC cells. It was not detected in normal renal tissues nor in HK-2 and primary human renal epithelial cells. THOR silencing (by targeted siRNAs) or CRISPR/Cas9 knockout inhibited RCC cell growth, viability and proliferation in vitro. Reversely, forced over-expression of THOR promoted RCC cell survival and proliferation. IGF2BP1-regulated genes, including IGF2, GLI1 and Myc, were downregulated by THOR silencing or knockout, but they were upregulated after THOR over-expression. In vivo, THOR-knockout 786-O tumors grew significantly slower than the control tumors in nude mice. CONCLUSION THOR expression promotes RCC cell growth in vitro and in vivo. THOR could be a novel and important therapeutic target for human RCC.
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Affiliation(s)
- Xue-Ting Ye
- Graduate School, Southern Medical University, Guangzhou, China; Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hang Huang
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Wei-Ping Huang
- Department of Urology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Wei-Lie Hu
- Graduate School, Southern Medical University, Guangzhou, China; Department of Urology, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, China.
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Bioactivity Determination of a Therapeutic Recombinant Human Keratinocyte Growth Factor by a Validated Cell-based Bioassay. Molecules 2019; 24:molecules24040699. [PMID: 30769959 PMCID: PMC6412437 DOI: 10.3390/molecules24040699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 01/21/2023] Open
Abstract
The therapeutic recombinant human keratinocyte growth factor 1 (rhKGF-1) was approved by the FDA for oral mucositis resulting from hematopoietic stem cell transplantation for hematological malignancies in 2004. However, no recommended bioassay for rhKGF-1 bioactivity has been recorded in the U.S. Pharmacopoeia. In this study, we developed an rhKGF-1-dependent bioassay for determining rhKGF-1 bioactivity based on HEK293 and HaCat cell lines that stably expressed the luciferase reporter driven by the serum response element (SRE) and human fibroblast growth factor receptor (FGFR2) IIIb. A good responsiveness to rhKGF-1 and rhKGF-2 shared by target HEK293/HaCat cell lines was demonstrated. Our stringent validation was completely focused on specificity, linearity, accuracy, precision, and robustness according to the International Council for Harmonization (ICH) Q2 (R1) guidelines, AAPS/FDA Bioanalytical Workshop and the Chinese Pharmacopoeia. We confirmed the reliability of the method in determining rhKGF bioactivity. The validated method is highly timesaving, sensitive, and simple, and is especially valuable for providing information for quality control during the manufacture, research, and development of therapeutic rhKGF.
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Chen J, Liu K, Liu Y, Wang X, Zhang Z. Targeting mTORC1/2 with OSI-027 inhibits proliferation and migration of keloid keratinocytes. Exp Dermatol 2019; 28:270-275. [PMID: 30650200 DOI: 10.1111/exd.13882] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 01/02/2019] [Accepted: 01/11/2019] [Indexed: 12/14/2022]
Abstract
Keloid is a dermal proliferative disorder characterized by the excessive proliferation and migration of keratinocytes and fibroblasts. Over-activation of the serine/threonine protein kinase, mammalian target of rapamycin (mTOR), plays a pivotal role in the process. Here, we show that both mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2) were hyper-activated in keloid-derived primary keratinocytes. Further, OSI-027, an mTOR kinase inhibitor, potently inhibited proliferation and migration of keloid keratinocytes. At the molecular level, OSI-027 disrupted the assembly of mTORC1 (mTOR-Raptor) and mTORC2 (mTOR-Rictor-mLST8). Further, OSI-027 almost completely blocked the phosphorylation of the mTORC1 substrates, S6K1, S6 and 4EBP1, and the mTORC2 substrate, AKT, at Ser-473. The OSI-027 treatment of keloid keratinocytes showed more effectively inhibited cell proliferation and migration compared to the mTORC1 inhibitor, rapamycin. Moreover, restoring mTORC1 activation by the introduction of the constitutively active S6K1 only partly alleviated OSI-027-induced inhibition of keloid keratinocytes. Notably, mTOR2 inhibition by Rictor siRNAs also inhibited keloid keratinocyte proliferation and migration, but less efficiently than OSI-027. Together, our results imply that concurrent targeting of mTORC1/2 by OSI-027 potently inhibits the proliferation and the migration of keloid keratinocytes. Thus, OSI-027 may have translational value for the treatment of keloid.
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Affiliation(s)
- Jun Chen
- Department of Dermatology and Dermatologic Surgery, Shanghai Ninth People's Hospital, Affiliated to Shanghai Jiaotong University School of Medicine, Center for Specialty Strategy Research of Shanghai, JiaoTong University China Hospital Development Institute, Shanghai, China
| | - Ke Liu
- Department of Dermatology and Dermatologic Surgery, Shanghai Ninth People's Hospital, Affiliated to Shanghai Jiaotong University School of Medicine, Center for Specialty Strategy Research of Shanghai, JiaoTong University China Hospital Development Institute, Shanghai, China
| | - Yang Liu
- Department of Dermatology and Dermatologic Surgery, Shanghai Ninth People's Hospital, Affiliated to Shanghai Jiaotong University School of Medicine, Center for Specialty Strategy Research of Shanghai, JiaoTong University China Hospital Development Institute, Shanghai, China
| | - Xue Wang
- Department of Dermatology and Dermatologic Surgery, Shanghai Ninth People's Hospital, Affiliated to Shanghai Jiaotong University School of Medicine, Center for Specialty Strategy Research of Shanghai, JiaoTong University China Hospital Development Institute, Shanghai, China
| | - Zhen Zhang
- Department of Dermatology and Dermatologic Surgery, Shanghai Ninth People's Hospital, Affiliated to Shanghai Jiaotong University School of Medicine, Center for Specialty Strategy Research of Shanghai, JiaoTong University China Hospital Development Institute, Shanghai, China
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Sun J, Huang W, Yang SF, Zhang XP, Yu Q, Zhang ZQ, Yao J, Li KR, Jiang Q, Cao C. Gαi1 and Gαi3mediate VEGF-induced VEGFR2 endocytosis, signaling and angiogenesis. Theranostics 2018; 8:4695-4709. [PMID: 30279732 PMCID: PMC6160771 DOI: 10.7150/thno.26203] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 08/17/2018] [Indexed: 12/21/2022] Open
Abstract
VEGF binding to VEGFR2 leads to VEGFR2 endocytosis and downstream signaling activation to promote angiogenesis. Methods: Using genetic strategies, we tested the requirement of α subunits of heterotrimeric G proteins (Gαi1/3) in the process. Results: Gαi1/3 are located in the VEGFR2 endocytosis complex (VEGFR2-Ephrin-B2-Dab2-PAR-3), where they are required for VEGFR2 endocytosis and downstream signaling transduction. Gαi1/3 knockdown, knockout or dominant negative mutation inhibited VEGF-induced VEGFR2 endocytosis, and downstream Akt-mTOR and Erk-MAPK activation. Functional studies show that Gαi1/3 shRNA inhibited VEGF-induced proliferation, invasion, migration and vessel-like tube formation of HUVECs. In vivo, Gαi1/3 shRNA lentivirus inhibited alkali burn-induced neovascularization in mouse cornea. Further, oxygen-induced retinopathy (OIR)-induced retinal neovascularization was inhibited by intravitreal injection of Gαi1/3 shRNA lentivirus. Moreover, in vivo angiogenesis by alkali burn and OIR was significantly attenuated in Gαi1/3 double knockout mice. Significantly, Gαi1/3 proteins are upregulated in proliferative retinal tissues of proliferative diabetic retinopathy (PDR) patients. Conclusion: These results provide mechanistic insights into the critical role played by Gαi1/3 proteins in VEGF-induced VEGFR2 endocytosis, signaling and angiogenesis.
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Ding LT, Zhao P, Yang ML, Lv GZ, Zhao TL. GDC-0084 inhibits cutaneous squamous cell carcinoma cell growth. Biochem Biophys Res Commun 2018; 503:1941-1948. [PMID: 30072096 DOI: 10.1016/j.bbrc.2018.07.139] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 07/26/2018] [Indexed: 12/17/2022]
Abstract
GDC-0084 is a novel and potent small-molecule PI3K-mTOR dual inhibitor. The present study examined its potential activity in cutaneous squamous cell carcinoma (cSCC) cells. Our results show that GDC-0084 treatment at nanomole concentrations potently inhibited survival and proliferation of established (A431, SCC-13 and SCL-1 lines) and primary human cSCC cells. GDC-0084 induced apoptosis activation and cell cycle arrest in the cSCC cells. It was more efficient than other known PI3K-Akt-mTOR inhibitors in killing cSCC cells, but was non-cytotoxic to the normal human skin fibroblasts/keratinocytes. In A431 cells and primary cSCC cells, GDC-0084 blocked phosphorylation of key PI3K-Akt-mTOR components, including p85, Akt, S6K1 and S6. GDC-0084 also inhibited DNA-PKcs activation in cSCC cells. Significantly, restoring DNA-PKcs activation by a constitutively active-DNA-PKcs (S2056D) partially inhibited GDC-0084-induced cell death and apoptosis in A431 cells. In vivo, GDC-0084 daily gavage potently inhibited A431 xenograft tumor growth in mice. In GDC-0084-treated tumor tissues PI3K-Akt-mTOR and DNA-PKcs activation were significantly inhibited. In summary, GDC-0084 inhibits human cSCC cell growth in vitro and in vivo through blocking PI3K-Akt-mTOR and DNA-PKcs signalings.
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Affiliation(s)
- Ling-Tao Ding
- Department of Plastic Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China; Department of Burns and Plastic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi, Jiangsu, China
| | - Peng Zhao
- Department of Burns and Plastic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi, Jiangsu, China
| | - Min-Lie Yang
- Department of Burns and Plastic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi, Jiangsu, China
| | - Guo-Zhong Lv
- Department of Burns and Plastic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi, Jiangsu, China.
| | - Tian-Lan Zhao
- Department of Plastic Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China.
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Zhu Y, Wang C, Zhou Y, Ma N, Zhou J. C6 ceramide motivates the anticancer sensibility induced by PKC412 in preclinical head and neck squamous cell carcinoma models. J Cell Physiol 2018; 233:9437-9446. [PMID: 29968910 DOI: 10.1002/jcp.26831] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Accepted: 05/10/2018] [Indexed: 01/09/2023]
Abstract
The purpose of this study was to evaluate the anti-head and neck squamous cell carcinoma (anti-HNSCC) cell activity by C6 ceramide and multikinase inhibitor PKC412. Experiments were performed on HNSCC cell lines (SQ20B and SCC-9) and primary human oral carcinoma cells. Results showed that PKC412 inhibited HNSCC cell proliferation without provoking apoptosis activation. Cotreatment of C6 ceramide significantly augmented PKC412-induced lethality in HNSCC cells. PKC412 decreased Akt-mammalian target of rapamycin (mTOR) activation in HNSCC cells, facilitated with cotreatment of C6 ceramide. In contrast, exogenous expression of a constitutively active Akt restored Akt-mTOR activation and attenuated lethality by the cotreatment. We propose that Mcl-1 is a primary resistance factor of PKC412. The cytotoxicity of PKC412 in HNSCC cells was potentiated with Mcl-1 short hairpin RNA knockdown, but was attenuated with Mcl-1 overexpression. Intriguingly, C6 ceramide downregulated Mcl-1 in HNSCC cells. In vivo, PKC412 oral administration inhibited SQ20B xenograft tumor growth in severe combined immunodeficient mice. The antitumor activity of PKC412 was further sensitized with coadministration of liposomal C6 ceramide. Together, we suggest that PKC412 could be further studied as a promising anti-HNSCC strategy, alone or in combination with C6 ceramide.
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Affiliation(s)
- Yanyan Zhu
- Department of Oncology, Henan Provincial People's Hospital, Zhengzhou, China
| | - Chaojie Wang
- Department of Oncology, Henan Provincial People's Hospital, Zhengzhou, China
| | - Yun Zhou
- Department of Oncology, Henan Provincial People's Hospital, Zhengzhou, China
| | - Ning Ma
- Department of Oncology, Henan Provincial People's Hospital, Zhengzhou, China
| | - Jianwei Zhou
- Department of Oncology, Henan Provincial People's Hospital, Zhengzhou, China
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40
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Li XM, Huang D, Yu Q, Yang J, Yao J. Neuroligin-3 protects retinal cells from H2O2-induced cell death via activation of Nrf2 signaling. Biochem Biophys Res Commun 2018; 502:166-172. [DOI: 10.1016/j.bbrc.2018.05.141] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 05/19/2018] [Indexed: 01/12/2023]
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41
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Ruan JW, Yao C, Bai JY, Zhou XZ. microRNA-29a inhibition induces Gab1 upregulation to protect OB-6 human osteoblasts from hydrogen peroxide. Biochem Biophys Res Commun 2018; 503:607-614. [PMID: 29902453 DOI: 10.1016/j.bbrc.2018.06.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 06/10/2018] [Indexed: 11/25/2022]
Abstract
The present study determines the role of the Gab1 in hydrogen peroxide (H2O2)-induced death of human osteoblasts. We show that Gab1 is required for H2O2-induced Akt activation to promote osteoblast survival. In OB-6 human osteoblasts, Gab1 silencing (by targeted-shRNA) or complete knockout (by CRISPR-Cas9 KO plasmid) largely attenuated Akt activation by H2O2. Gab1-depleted OB-6 cells were more vulnerable to H2O2. Conversely, forced over-expression of Gab1 by an adenovirus vector increased Akt activation to protect OB-6 cells from H2O2. Significantly, the anti-sense of microRNA-29a ("antagomiR-29a") induced Gab1 expression to facilitate H2O2-induced Akt activation, which protected OB-6 cells from apoptosis. AntagomiR-29a was however ineffective in Gab1-deficient and Akt-inhibited OB-6 cells. Forced over-expression of miR-29a induced Gab1 downregulation to inhibit H2O2-induced Akt activation, causing enhanced OB-6 cell death. miR-29a-induced actions were abolished by an adenovirus constitutively-active Akt1 (Ad-caAkt1) in OB-6 cells. Together, microRNA-29a inhibition induces Gab1 upregulation and Akt activation to protect OB-6 osteoblasts from H2O2.
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Affiliation(s)
- Jian-Wei Ruan
- Department of Orthopedics, The Second Affiliated Hospital of Suzhou University, Suzhou, China; Department of Orthopedics, Taizhou Municipal Hospital, Taizhou, China
| | - Chen Yao
- Orthopedic Department, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Jin-Yu Bai
- Department of Orthopedics, The Second Affiliated Hospital of Suzhou University, Suzhou, China
| | - Xiao-Zhong Zhou
- Department of Orthopedics, The Second Affiliated Hospital of Suzhou University, Suzhou, China.
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42
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Liu Z, Wu G, Lin C, Guo H, Xu J, Zhao T. IGF2BP1 over-expression in skin squamous cell carcinoma cells is essential for cell growth. Biochem Biophys Res Commun 2018; 501:731-738. [DOI: 10.1016/j.bbrc.2018.05.057] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 05/09/2018] [Indexed: 10/16/2022]
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43
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Shi X, Liu HY, Li SP, Xu HB. Keratinocyte growth factor protects endometrial cells from oxygen glucose deprivation/re-oxygenation via activating Nrf2 signaling. Biochem Biophys Res Commun 2018; 501:178-185. [DOI: 10.1016/j.bbrc.2018.04.208] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 04/26/2018] [Indexed: 12/20/2022]
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44
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Assessment of GSK1904529A as a promising anti-osteosarcoma agent. Oncotarget 2018; 8:49646-49654. [PMID: 28572530 PMCID: PMC5564795 DOI: 10.18632/oncotarget.17911] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 05/04/2017] [Indexed: 01/20/2023] Open
Abstract
The insulin growth factor-I receptor (IGF1R) signaling is a key mechanism for osteosarcoma (OS) cell proliferation. GSK1904529A is a novel small molecule IGF1R kinase inhibitor. Its activity against OS cells was tested. In both established OS cell lines (Saos-2 and MG-63) and primary human OS cells, treatment with GSK1904529A (at nM concentrations) significantly inhibited cell proliferation. At the molecular level, GSK1904529A almost completely blocked IGF1R activation in OS cells, and inhibited downstream AKT-ERK activation. IGF1R silence by targeted shRNA also inhibited AKT-ERK activation and Saos-2 cell proliferation. Significantly, GSK1904529A was unable to further inhibit proliferation of IGF1R-silenced Saos-2 cells. In vivo, GSK1904529A administration orally inhibited Saos-2 tumor growth in nude mice. Together, these results suggest that targeting IGF1R by GSK1904529A inhibits OS cell growth in vitro and in vivo.
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45
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Marshall J, Zhou XZ, Chen G, Yang SQ, Li Y, Wang Y, Zhang ZQ, Jiang Q, Birnbaumer L, Cao C. Antidepression action of BDNF requires and is mimicked by Gαi1/3 expression in the hippocampus. Proc Natl Acad Sci U S A 2018; 115:E3549-E3558. [PMID: 29507199 PMCID: PMC5899481 DOI: 10.1073/pnas.1722493115] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Stress-related alterations in brain-derived neurotrophic factor (BDNF) expression, a neurotrophin that plays a key role in synaptic plasticity, are believed to contribute to the pathophysiology of depression. Here, we show that in a chronic mild stress (CMS) model of depression the Gαi1 and Gαi3 subunits of heterotrimeric G proteins are down-regulated in the hippocampus, a key limbic structure associated with major depressive disorder. We provide evidence that Gαi1 and Gαi3 (Gαi1/3) are required for the activation of TrkB downstream signaling pathways. In mouse embryonic fibroblasts (MEFs) and CNS neurons, Gαi1/3 knockdown inhibited BDNF-induced tropomyosin-related kinase B (TrkB) endocytosis, adaptor protein activation, and Akt-mTORC1 and Erk-MAPK signaling. Functional studies show that Gαi1 and Gαi3 knockdown decreases the number of dendrites and dendritic spines in hippocampal neurons. In vivo, hippocampal Gαi1/3 knockdown after bilateral microinjection of lentiviral constructs containing Gαi1 and Gαi3 shRNA elicited depressive behaviors. Critically, exogenous expression of Gαi3 in the hippocampus reversed depressive behaviors in CMS mice. Similar results were observed in Gαi1/Gαi3 double-knockout mice, which exhibited severe depressive behaviors. These results demonstrate that heterotrimeric Gαi1 and Gαi3 proteins are essential for TrkB signaling and that disruption of Gαi1 or Gαi3 function could contribute to depressive behaviors.
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MESH Headings
- Animals
- Brain-Derived Neurotrophic Factor/metabolism
- Dendrites/metabolism
- Dendrites/pathology
- Dendritic Spines/metabolism
- Dendritic Spines/pathology
- Depression/metabolism
- Depression/pathology
- Depressive Disorder, Major/metabolism
- Depressive Disorder, Major/pathology
- Down-Regulation
- Female
- GTP-Binding Protein alpha Subunit, Gi2/biosynthesis
- GTP-Binding Protein alpha Subunit, Gi2/genetics
- GTP-Binding Protein alpha Subunit, Gi2/metabolism
- GTP-Binding Protein alpha Subunits, Gi-Go/biosynthesis
- GTP-Binding Protein alpha Subunits, Gi-Go/genetics
- GTP-Binding Protein alpha Subunits, Gi-Go/metabolism
- Hippocampus/metabolism
- Mice
- Mice, Knockout
- Neurons/metabolism
- Neurons/pathology
- Signal Transduction/drug effects
- Stress, Physiological/physiology
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Affiliation(s)
- John Marshall
- Department of Molecular Pharmacology, Physiology, and Biotechnology, Brown University, Providence, RI 02912;
| | - Xiao-Zhong Zhou
- Jiangsu Key Laboratory of Neuropsychiatric Diseases Research, Soochow University, Suzhou 215000, China
- Institute of Neuroscience, Soochow University, Suzhou 215000, China
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, 215004 Jiangsu, China
| | - Gang Chen
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006 Jiangsu, China
| | - Su-Qing Yang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases Research, Soochow University, Suzhou 215000, China
- Institute of Neuroscience, Soochow University, Suzhou 215000, China
| | - Ya Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases Research, Soochow University, Suzhou 215000, China
- Institute of Neuroscience, Soochow University, Suzhou 215000, China
| | - Yin Wang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases Research, Soochow University, Suzhou 215000, China
- Institute of Neuroscience, Soochow University, Suzhou 215000, China
| | - Zhi-Qing Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases Research, Soochow University, Suzhou 215000, China
- Institute of Neuroscience, Soochow University, Suzhou 215000, China
| | - Qin Jiang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, 210029 Nanjing, China
| | - Lutz Birnbaumer
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709;
- School of Medical Sciences, Institute of Biomedical Research, Catholic University of Argentina, C1107AAZ Buenos Aires, Argentina
| | - Cong Cao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases Research, Soochow University, Suzhou 215000, China;
- Institute of Neuroscience, Soochow University, Suzhou 215000, China
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, 210029 Nanjing, China
- North District, The Municipal Hospital of Suzhou, Suzhou 215001, China
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46
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Chen MB, Liu YY, Cheng LB, Lu JW, Zeng P, Lu PH. AMPKα phosphatase Ppm1E upregulation in human gastric cancer is required for cell proliferation. Oncotarget 2018; 8:31288-31296. [PMID: 28423719 PMCID: PMC5458207 DOI: 10.18632/oncotarget.16126] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 02/15/2017] [Indexed: 12/21/2022] Open
Abstract
Activation of AMP-activated protein kinase (AMPK) is a valuable anti-cancer strategy. In the current study, we tested expression and potential function of Ca2+/calmodulin-dependent protein kinase phosphatase (Ppm1E), an AMPKα phosphatase, in human gastric cancers. Ppm1E expression was elevated in human gastric cancer tissues (vs. normal tissues), which was correlated with AMPK (p-AMPKα, Thr-172) dephosphorylation and mTOR complex 1 (mTORC1) activation. Ppm1E upregulation, AMPK inhibition and mTORC1 activation were also observed in human gastric cancer cell lines (AGS, HGC-27, and SNU601). Intriguingly, Ppm1E knockdown by shRNA induced AMPK activation, mTORC1 inactivation, and proliferation inhibition in AGS cells. On the other hand, forced over-expression of Ppm1E induced further AMPK inhibition and mTORC1 activation to enhance AGS cell proliferation. Remarkably, microRNA-135b-5p (“miR-135b-5p”), an anti-Ppm1E microRNA, was downregulated in both human gastric cancer tissues and cells. Reversely, miR-135b-5p exogenous expression caused Ppm1E depletion, AMPK activation, and AGC cell proliferation inhibition. Together, Ppm1E upregulation in human gastric cancer is important for cell proliferation, possible via regulating AMPK-mTOR signaling.
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Affiliation(s)
- Min-Bin Chen
- Department of Radiotherapy and Oncology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, China
| | - Yuan-Yuan Liu
- Department of Radiotherapy and Oncology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, China
| | - Li-Bo Cheng
- Department of Ophthalmology, Wuxi Second Hospital, Nanjing Medical University, Wu'xi, China
| | - Jian-Wei Lu
- Department of Oncology, Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing, China
| | - Ping Zeng
- Department of Radiotherapy and Oncology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, China
| | - Pei-Hua Lu
- Department of Radiotherapy and Oncology, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, China
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47
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Liu YY, Chen MB, Cheng L, Zhang ZQ, Yu ZQ, Jiang Q, Chen G, Cao C. microRNA-200a downregulation in human glioma leads to Gαi1 over-expression, Akt activation, and cell proliferation. Oncogene 2018. [PMID: 29520106 DOI: 10.1038/s41388-018-0184-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We previously identified a pivotal role for G protein α inhibitory subunit 1 (Gαi1) in mediating PI3K-Akt signaling by receptor tyrosine kinases (RTKs). Here, we examined the expression and biological function of Gαi1 in human glioma. Gαi1 mRNA and protein expression were significantly upregulated in human glioma tissues, which correlated with downregulation of an anti-Gαi1 miRNA: microRNA-200a ("miR-200a"). Forced-expression of miR-200a in established (A172/U251MG lines) and primary (patient-derived) human glioma cells resulted in Gαi1 downregulation, Akt inactivation and proliferation inhibition. Reduction of Gαi1 expression by shRNA, dominant negative mutant interference, or complete Gαi1 depletion inhibited Akt activation and cell proliferation. Notably, miR-200a was unable to inhibit glioma cell proliferation when Gαi1 was silenced or mutated. Co-immunoprecipitation studies, in human glioma cells and tissues, show that Gαi1 forms a complex with multiple RTKs (EGFR, PDGFRα, and FGFR) and the adapter protein Gab1. In vivo, the growth of subcutaneous and orthotopic glioma xenografts in nude mice was largely inhibited by expression of Gαi1 shRNA or miRNA-200a. Collectively, miR-200a downregulation in human glioma leads to Gαi1 over-expression, Akt activation and glioma cell proliferation.
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Affiliation(s)
- Yuan-Yuan Liu
- Clinical Research and Lab Center, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, China.,Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Min-Bin Chen
- Department of Radiotherapy and Oncology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, China
| | - Long Cheng
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China.,Department of Interventional Radiology, The Second Affiliated Hospital of Soochow University, Soochow University, Suzhou, China
| | - Zhi-Qing Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Zheng-Quan Yu
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Qin Jiang
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China.
| | - Gang Chen
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, China.
| | - Cong Cao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China. .,The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China. .,North District, The Municipal Hospital of Suzhou, Suzhou, China.
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48
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Cai S, Li Y, Bai JY, Zhang ZQ, Wang Y, Qiao YB, Zhou XZ, Yang B, Tian Y, Cao C. Gαi3 nuclear translocation causes irradiation resistance in human glioma cells. Oncotarget 2018; 8:35061-35068. [PMID: 28456783 PMCID: PMC5471034 DOI: 10.18632/oncotarget.17043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 03/30/2017] [Indexed: 12/27/2022] Open
Abstract
We have previously shown that Gαi3 is elevated in human glioma, mediating Akt activation and cancer cell proliferation. Here, we imply that Gαi3 could also be important for irradiation resistance. In A172 human glioma cells, Gαi3 knockdown (by targeted shRNAs) or dominant-negative mutation significantly potentiated irradiation-induced cell apoptosis. Reversely, forced over-expression of wild-type or constitutively-active Gαi3 inhibited irradiation-induced A172 cell apoptosis. Irradiation in A172 cells induced Gαi3 translocation to cell nuclei and association with local protein DNA-dependent protein kinase (DNA-PK) catalytic subunit. This association was important for DNA damage repair. Gαi3 knockdown, depletion (using Gαi3 knockout MEFs) or dominant-negative mutation potentiated irradiation-induced DNA damages. On the other hand, expression of the constitutively-active Gαi3 in A172 cells inhibited DNA damage by irradiation. Together, these results indicate a novel function of Gαi3 in irradiation-resistance in human glioma cells.
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Affiliation(s)
- Shang Cai
- Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Ya Li
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Jin-Yu Bai
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Zhi-Qing Zhang
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Yin Wang
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Yin-Biao Qiao
- Department of Surgery, The Third Hospital affiliated to Soochow University
| | - Xiao-Zhong Zhou
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Bo Yang
- Department of Surgery, The Third Hospital affiliated to Soochow University
| | - Ye Tian
- Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Cong Cao
- Institute of Neuroscience, Soochow University, Suzhou, China
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49
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Gu DH, Mao JH, Pan XD, Zhu H, Chen X, Zheng B, Shan Y. microRNA-302c-3p inhibits renal cell carcinoma cell proliferation by targeting Grb2-associated binding 2 (Gab2). Oncotarget 2018; 8:26334-26343. [PMID: 28412750 PMCID: PMC5432261 DOI: 10.18632/oncotarget.15463] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 02/02/2017] [Indexed: 11/25/2022] Open
Abstract
The expression and biological function of Grb2-associated binding 2 (Gab2) in renal cell carcinoma (RCC) cells was tested here. We showed that Gab2 expression was significantly elevated in human RCC tissues and RCC cells. It was correlated with over-activation of Akt and downregulation of microRNA-302c-3p ("miR-302c-3p"), a putative Gab2-targeting microRNA. Knockdown of Gab2 inhibited Akt activation and 786-O RCC cell proliferation. Reversely, forced over-expression of Gab2 led to Akt hyper-activation to facilitate 786-O cell proliferation. Exogenous expression of miR-302c caused Gab2 downregulation, Akt inhibition and 786-O cell proliferation inhibition. On the other hand, miR-302c-3p depletion by expressing its anti-sense ("antagomiR-302c") led to Gab2 upregulation, Akt activation and increased 786-O cell proliferation. Significantly, miR-302c-3p failed to affect the proliferation of 786-O cells with shRNA-depleted Gab2. Together, we suggest that miR-302c-3p depletion in human RCC cells leads to Gab2 over-expression, Akt hyper-activation and cell proliferation.
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Affiliation(s)
- Dong-Hua Gu
- The Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Jia-Hui Mao
- Department of Pathophysiology, Nantong University School of Medicine, Nantong, China
| | - Xiao-Dong Pan
- The Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, China.,The Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Hua Zhu
- The Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Xinfeng Chen
- The Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Bing Zheng
- The Department of Urology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Yuxi Shan
- The Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, China
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50
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Xiong Z, Zang Y, Zhong S, Zou L, Wu Y, Liu S, Fang Z, Shen Z, Ding Q, Chen S. The preclinical assessment of XL388, a mTOR kinase inhibitor, as a promising anti-renal cell carcinoma agent. Oncotarget 2018; 8:30151-30161. [PMID: 28404914 PMCID: PMC5444733 DOI: 10.18632/oncotarget.15620] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 01/16/2017] [Indexed: 01/07/2023] Open
Abstract
XL388 is a mammalian target of rapamycin (mTOR) kinase inhibitor. We demonstrated that XL388 inhibited survival and proliferation of renal cell carcinoma (RCC) cell lines (786-0 and A549) and primary human RCC cells. XL388 activated caspase-dependent apoptosis in the RCC cells. XL388 blocked mTOR complex 1 (mTORC1) and mTORC2 activation, and depleted hypoxia-inducible factor 1α (HIF1α) and HIF-2α expression in RCC cells. Yet, XL388 was ineffective in RCC cells with mTOR shRNA knockdown or kinase-dead mutation. Notably, XL388 was more efficient than mTORC1 inhibitors (rapamycin, everolimus and temsirolimus) in killing RCC cells. Further studies showed that activation of MEK-ERK might be a key resistance factor of XL388. Pharmacological or shRNA-mediated inhibition of MEK-ERK pathway sensitized XL388-induced cytotoxicity in RCC cells. In vivo, oral administration of XL388 inhibited in nude mice 786-0 RCC tumor growth, and its anti-tumor activity was sensitized with co-administration of the MEK-ERK inhibitor MEK162. Together, these results suggest that concurrent inhibition of mTORC1/2 by XL388 may represent a fine strategy to inhibit RCC cells.
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Affiliation(s)
- Zuquan Xiong
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Yiwen Zang
- Department of General Surgery, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Shan Zhong
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Lujia Zou
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Yishuo Wu
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Shenghua Liu
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Zujun Fang
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Zhoujun Shen
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Qiang Ding
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
| | - Shanwen Chen
- Department of Urology, Huashan Hospital Affiliated to Fudan University, Shanghai, China
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