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Qi F, He H, Zhu Y. Neural Development and Repair Induced by Femtosecond Laser Stimulation. ACS Chem Neurosci 2024; 15:3106-3112. [PMID: 39163542 DOI: 10.1021/acschemneuro.4c00310] [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: 08/22/2024] Open
Abstract
Dendritic spines function as postsynaptic sites, receiving excitatory signals from presynaptic axons. The synaptic plasticity of spines underlies the refinement of neuronal circuits. Neural cognitive disorders are commonly associated with the impairment and elimination of dendritic spines. In this study, we report an all-optical method to activate dendritic spine growth and regeneration by a single short flash of femtosecond laser stimulation. The inhibited development and loss of spines can be rescued by a transient illumination of the laser inside a micrometer region of the soma by activating the extracellular signal-regulated kinase (ERK) signaling pathway. The rescued neurons exhibit function. Hence we provide a potential noninvasive method for the regeneration of dendritic spines.
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Affiliation(s)
- Fan Qi
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, P. R. China
| | - Hao He
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200031, P. R. China
| | - Yujie Zhu
- Department of Laser and Aesthetic Medicine and Department of Dermatology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200041, P. R. China
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2
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Yao H, Zhang M, Wang D. The next decade of SET: from an oncoprotein to beyond. J Mol Cell Biol 2024; 16:mjad082. [PMID: 38157418 PMCID: PMC11267991 DOI: 10.1093/jmcb/mjad082] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 11/22/2023] [Accepted: 12/24/2023] [Indexed: 01/03/2024] Open
Abstract
This year marks the fourth decade of research into the protein SET, which was discovered in 1992. SET was initially identified as an oncoprotein but later shown to be a multifaceted protein involved in regulating numerous biological processes under both physiological and pathophysiological conditions. SET dysfunction is closely associated with diseases, such as cancer and Alzheimer's disease. With the increasing understanding of how SET works and how it is regulated in cells, targeting aberrant SET has emerged as a potential strategy for disease intervention. In this review, we present a comprehensive overview of the advancements in SET studies, encompassing its biological functions, regulatory networks, clinical implications, and pharmacological inhibitors. Furthermore, we provide insights into the future prospects of SET research, with a particular emphasis on its promising potential in the realm of immune modulation.
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Affiliation(s)
- Han Yao
- State Key Laboratory of Common Mechanism Research for Major Diseases & Department of Medical Genetics, Institute of Basic Medical Sciences & School of Basic Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China
| | - Meng Zhang
- State Key Laboratory of Common Mechanism Research for Major Diseases & Department of Medical Genetics, Institute of Basic Medical Sciences & School of Basic Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China
| | - Donglai Wang
- State Key Laboratory of Common Mechanism Research for Major Diseases & Department of Medical Genetics, Institute of Basic Medical Sciences & School of Basic Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China
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3
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Bingyu W, Xi Y, Jiangfang L, Jianqing Z. Key chromatin regulator-related genes associated with the risk of coronary artery disease regulate the expression of HCFC1, RNF8, TNP1 and SET. Heliyon 2024; 10:e28685. [PMID: 38596069 PMCID: PMC11002600 DOI: 10.1016/j.heliyon.2024.e28685] [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: 06/28/2023] [Revised: 03/12/2024] [Accepted: 03/22/2024] [Indexed: 04/11/2024] Open
Abstract
Chromatin regulators are indispensable upstream epigenetic regulators.The emergence and progression of atherosclerosis has been demonstrated to be influenced by smooth muscle-related chromatin regulators, such as ZEB2 and MAFF. However, specific chromatin regulators and their possible roles have not been clarified. Information was gathered from 51 patients diagnosed with coronary artery disease (CAD) and 50 individuals in good health from the GEO database. 440 genes were identified as having differential expression across the two datasets, and these genes were linked to cellular reactions. Enrichment of pathways related to histone modification and transcriptional regulatory factors was observed in GO and KEGG analyses. Four machine learning models (RF, SVM, GLM, and XGB) were developed using the expression profiles of 440 chromatin-associated genes in the CAD cohort to pinpoint genes with significant diagnostic potential. After evaluating residuals, root mean square errors, receiver operating characteristic curves, and immune-infiltration, four key genes (HCFC1, RNF8, TNP1, and SET) were identified. Gene expression in different blood vessel levels in atherosclerotic plaques in a mouse model of coronary artery disease showed significant variations. The gene expression levels in macrophages aligned with clinical data from the GEO database as expected. This discovery is crucial for future analysis and the prediction of drug and miRNA targets. In conclusion, we found that the four hub genes are important in the mechanism of CAD. These findings provide new ideas for the study of potential epigenetic predictive markers and therapeutic targets to be used in determining a treatment strategy for CAD.
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Affiliation(s)
- Wang Bingyu
- Department of Cardiovascular, Ningbo Medical Center Lihuili Hospital, Ningbo, China
| | - Yang Xi
- Department of Cardiovascular, Ningbo Medical Center Lihuili Hospital, Ningbo, China
- Ningbo Institute of Innovation for Combined Medicine and Engineering, Ningbo, China
| | - Lian Jiangfang
- Department of Cardiovascular, Ningbo Medical Center Lihuili Hospital, Ningbo, China
- Ningbo Institute of Innovation for Combined Medicine and Engineering, Ningbo, China
| | - Zhou Jianqing
- Department of Cardiovascular, Ningbo Medical Center Lihuili Hospital, Ningbo, China
- Ningbo Institute of Innovation for Combined Medicine and Engineering, Ningbo, China
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4
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Mamaghaniyeh R, Zandieh A, Goliaei B, Nezamtaheri MS, Shariatpanahi SP. Effects of exposure to alternating low-intensity, intermediate-frequency electric fields on the differentiation of human leukemic cell line U937. Bioelectromagnetics 2024; 45:48-57. [PMID: 37870254 DOI: 10.1002/bem.22487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/20/2023] [Accepted: 09/20/2023] [Indexed: 10/24/2023]
Abstract
Studying the bioeffects of electric fields have been the subject of ongoing research which led to promising therapeutic effect, particularly in cancer treatment. Here, we investigated the impact of low-intensity, intermediate-frequency alternating electric fields on the differentiation of human myeloid leukemia cell line U937. The results showed a near twofold increase in differentiation of U937 cells treated for 24 h by alternating 600 kHz, 150 V/m electric fields, in comparison to their control groups. This measure was evaluated by latex bead phagocytosis assay, nitro blue tetrazolium test, and cell cycle analysis which revealed a significant shift in the number of cells from G2 +M to G0 +G1 phases. The simulation result for the intracellular field intensity showed around 50% attenuation with respect to the applied external field for our setup which ruled out masking of the applied field by the internal electric noise of the cell. Based on previous studies we postulate a possible calcium-related effect for the observed differentiation, yet the exact underlying mechanism requires further investigation. Finally, our results may offer a potential therapeutic method for leukemia in the future.
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Affiliation(s)
- Rayehe Mamaghaniyeh
- Laboratory of Biophysics and Molecular Biology, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Amirali Zandieh
- Laboratory of Biophysics and Molecular Biology, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Bahram Goliaei
- Laboratory of Biophysics and Molecular Biology, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Maryam S Nezamtaheri
- Laboratory of Biophysics and Molecular Biology, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Seyed P Shariatpanahi
- Laboratory of Biophysics and Molecular Biology, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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5
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Di Mambro A, Esposito M. Thirty years of SET/TAF1β/I2PP2A: from the identification of the biological functions to its implications in cancer and Alzheimer's disease. Biosci Rep 2022; 42:BSR20221280. [PMID: 36345878 PMCID: PMC9679398 DOI: 10.1042/bsr20221280] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 10/17/2022] [Accepted: 11/07/2022] [Indexed: 10/29/2023] Open
Abstract
The gene encoding for the protein SE translocation (SET) was identified for the first time 30 years ago as part of a chromosomal translocation in a patient affected by leukemia. Since then, accumulating evidence have linked overexpression of SET, aberrant SET splicing, and cellular localization to cancer progression and development of neurodegenerative tauopathies such as Alzheimer's disease. Molecular biology tools, such as targeted genetic deletion, and pharmacological approaches based on SET antagonist peptides, have contributed to unveil the molecular functions of SET and its implications in human pathogenesis. In this review, we provide an overview of the functions of SET as inhibitor of histone and non-histone protein acetylation and as a potent endogenous inhibitor of serine-threonine phosphatase PP2A. We discuss the role of SET in multiple cellular processes, including chromatin remodelling and gene transcription, DNA repair, oxidative stress, cell cycle, apoptosis cell migration and differentiation. We review the molecular mechanisms linking SET dysregulation to tumorigenesis and discuss how SET commits neurons to progressive cell death in Alzheimer's disease, highlighting the rationale of exploiting SET as a therapeutic target for cancer and neurodegenerative tauopathies.
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Affiliation(s)
- Antonella Di Mambro
- The Centre for Integrated Research in Life and Health Sciences, School of Health and Life Science, University of Roehampton, London, U.K
| | - Maria Teresa Esposito
- The Centre for Integrated Research in Life and Health Sciences, School of Health and Life Science, University of Roehampton, London, U.K
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Han D, Wang L, Long L, Su P, Luo D, Zhang H, Li Z, Chen B, Zhao W, Zhang N, Wang X, Liang Y, Li Y, Hu G, Yang Q. The E3 Ligase TRIM4 Facilitates SET Ubiquitin-Mediated Degradation to Enhance ER-α Action in Breast Cancer. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201701. [PMID: 35843886 PMCID: PMC9443474 DOI: 10.1002/advs.202201701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 06/10/2022] [Indexed: 06/15/2023]
Abstract
Estrogen receptor alpha (ER-α) action is critical for hormone-dependent breast cancer, and ER-α dysregulation can lead to the emergence of resistance to endocrine therapy. Here, it is found that TRIM4 is downregulated in tamoxifen (TAM)-resistant breast cancer cells, while the loss of TRIM4 is associated with an unfavorable prognosis. In vitro and in vivo experiments confirm that TRIM4 increased ER-α expression and the sensitivity of breast cancer cells to TAM. Mechanistically, TRIM4 is found to target SET, and TRIM4-SET interactions are mediated by the RING and B-box domains of TRIM4 and the carboxyl terminus of SET. Moreover, it is determined that TRIM4 catalyzed the K48-linked polyubiquitination of SET (K150 and K172), promoting its proteasomal degradation and disassociation from p53 and PP2A. Once released, p53 and PP2A are able to further promote ESR1 gene transcription and enhance mRNA stability. Moreover, univariate and multivariate Cox proportional hazards regression analyses confirm that TRIM4 expression is an independent predictor of overall survival and recurrence-free survival outcomes in patients with ER-α positive breast cancer. Taken together, the data highlights a previously undiscovered mechanism and suggest that TRIM4 is a valuable biomarker that can be analyzed to predict response to endocrine therapy in breast cancer patients.
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Affiliation(s)
- Dianwen Han
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Lijuan Wang
- Pathology Tissue BankQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Li Long
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
- Mianyang Central HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaMianyangSichuan621000China
| | - Peng Su
- Department of PathologyQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Dan Luo
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Hanwen Zhang
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Zheng Li
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Bing Chen
- Pathology Tissue BankQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Wenjing Zhao
- Pathology Tissue BankQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Ning Zhang
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Xiaolong Wang
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Yiran Liang
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Yaming Li
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
| | - Guohong Hu
- The Key Laboratory of Stem Cell BiologyInstitute of Health SciencesShanghai Institutes for Biological SciencesChinese Academy of Sciences & Shanghai Jiao Tong University School of MedicineUniversity of Chinese Academy of SciencesShanghai200233China
| | - Qifeng Yang
- Department of Breast Surgery, General SurgeryQilu Hospital of Shandong UniversityJinanShandong250012China
- Pathology Tissue BankQilu Hospital of Shandong UniversityJinanShandong250012China
- Research Institute of Breast CancerShandong UniversityJinanShandong250012China
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7
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Li S, Deng G, Su J, Wang K, Wang C, Li L, Song S, Peng X, Chen F. A novel all-trans retinoic acid derivative regulates cell cycle and differentiation of myelodysplastic syndrome cells by USO1. Eur J Pharmacol 2021; 906:174199. [PMID: 34058203 DOI: 10.1016/j.ejphar.2021.174199] [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: 02/06/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 11/16/2022]
Abstract
4-Amino-2-Trifluoromethyl-Phenyl Retinate (ATPR), a novel all-trans retinoic acid (ATRA) derivative, has been demonstrated that it had a variety of anti-tumor effects by exerting regulation on cellular proliferation, apoptosis and differentiation. Here, we found that ATPR is critical for alleviating myelodysplastic syndrome (MDS) and acute myelogenous leukemia. USO1, vesicle transport factor, belongs to tether protein family and involved in endoplasmic reticulum to Golgi trafficking of protein which is important to tumorigenesis. How USO1 contribute to MDS remain elusive. USO1 is aberrantly activated in MDS and AML in vivo and vitro, aberration of which might be a dominant mechanism for MDS cell survival. During the ATPR-induced remission of MDS, in vitro, USO1 presents a time and concentration-dependent decrease. Silencing of USO1 promotes myeloid differentiation of MDS cells and inhibits MDS cellular proliferation while USO1 over-expression has the opposite effect, suggesting that reduction of USO1 enhances the sensitivity of SKM-1 cells to ATPR treatment. Mechanistically, USO1 exerts its oncogenic role by inactivating Raf/ERK signaling, while ATPR is access to revise it. Notably, the activity of Raf/ERK pathway is required for the development and maintenance of MDS cell proliferation. Collectively, our results demonstrate the USO1- Raf/ERK signaling axis in MDS and highlight the negative role of USO1 in ATPR-regulated remission of MDS.
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Affiliation(s)
- Shufang Li
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China
| | - Ge Deng
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China
| | - Jingwen Su
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China
| | - Ke Wang
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China
| | - Cong Wang
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China
| | - Lanlan Li
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China
| | - Sujing Song
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China
| | - Xiaoqing Peng
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China
| | - Feihu Chen
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, China.
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Qu M, Duan Y, Zhao M, Wang Z, Zhao M, Zhao Y, Wang H, Ke Y, Liu Y, Liu HM, Wei L, Hu Z. Jiyuan Oridonin A Overcomes Differentiation Blockade in Acute Myeloid Leukemia Cells With MLL Rearrangements via Multiple Signaling Pathways. Front Oncol 2021; 11:659720. [PMID: 33842376 PMCID: PMC8033199 DOI: 10.3389/fonc.2021.659720] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/04/2021] [Indexed: 11/29/2022] Open
Abstract
Differentiation therapy with all-trans-retinoic acid (ATRA) in acute promyelocytic leukemia (APL), a subtype of acute myeloid leukemia (AML), has been extremely successful in inducing clinical remission in APL patients. However, the differentiation therapy of ATRA-based treatment has not been effective in other subtypes of AML. In this study, we evaluated a small molecule of ent-kaurene diterpenoid, Jiyuan oridonin A (JOA), on the differentiation blockade in AML cells with the mixed lineage leukemia (MLL) gene rearrangements (MLLr) in MV4-11, MOLM-13 and THP-1 cells. We found that JOA could significantly inhibit the proliferation of MOLM-13, MV4-11 and THP-1 cells. Moreover, JOA promoted cell differentiation coupled with cell-cycle exit at G0/G1 and inhibited the colony- forming capacity of these cells. We showed that the anti-proliferative effect of JOA attributed to cell differentiation is most likely through the martens tretinoin response up pathway in the MOLM-13 cell line, and the hematopoietic cell lineage pathway by the inhibition of c-KIT expression and cell adhesion pathway in the THP-1 cell line. Our findings suggest that JOA could be a novel therapeutic agent against human MLLr acute myeloid leukemia.
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Affiliation(s)
- Mei Qu
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Yu Duan
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Min Zhao
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Zhanju Wang
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Mengjie Zhao
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Yao Zhao
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Haihua Wang
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Yu Ke
- School of Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Ying Liu
- School of Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Hong-Min Liu
- School of Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Liuya Wei
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China.,School of Pharmacy, Weifang Medical University, Weifang, China
| | - Zhenbo Hu
- Laboratory for Stem Cell and Regenerative Medicine, Affiliated Hospital of Weifang Medical University, Weifang, China
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Lü X, Yang F, Huang Y, Yu Y. Role of integrin in influencing differentiation of PC12 cell grown on PLLA-aligned nanofiber: a mRNA–microRNA–protein integrative study. Regen Biomater 2016. [DOI: 10.1093/rb/rbw040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Xiaoying Lü
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226001, PR China
| | - Fei Yang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China
| | - Yan Huang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China
| | - Yadong Yu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China
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Zamanian M, Qader Hamadneh LA, Veerakumarasivam A, Abdul Rahman S, Shohaimi S, Rosli R. Calreticulin mediates an invasive breast cancer phenotype through the transcriptional dysregulation of p53 and MAPK pathways. Cancer Cell Int 2016; 16:56. [PMID: 27418879 PMCID: PMC4944499 DOI: 10.1186/s12935-016-0329-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Accepted: 05/31/2016] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The introduction of effective novel biomarkers of invasion and metastasis is integral for the advancement of breast cancer management. The present study focused on the identification and evaluation of calreticulin (CRT) as a potential biomarker for breast cancer invasion. METHODS Two-dimensional gel protein electrophoresis and MALDI-TOF were utilized in the analysis of fresh-frozen invasive intra-ductal carcinoma specimens. Calreticulin-associated expression was analyzed using immunohistochemistry of FFPE non-malignant/malignant breast specimens. A CRT-knockdown model of MCF7 cell line was developed using siRNA and the CRT genotype/phenotype correlations based on migration and trans-well invasion assays were determined. Finally, microarray-based global gene expression profiling was conducted to elucidate the possible calreticulin pro-invasive regulatory pathways. RESULTS Two-dimensional gel protein electrophoresis and MALDI-TOF analysis showed upregulation of calreticulin expression in tumor tissues as compared to the normal adjacent tissues. Meta-analysis of the immunohistochemical results confirmed significantly higher expression of calreticulin (p < 0.05) in the stromal compartments of malignant tissues as compared to non-malignant tissues. Migration and transwell invasion assays showed significant loss in the migratory and invasive potential of CRT-knockdown cells (p < 0.05). Global gene expression profiling successfully identified various putative gene networks such as p53 and MAPK pathways that are involved in calreticulin breast cancer signaling. CONCLUSION Besides confirming calreticulin overexpression in invasive breast cancer tissues, this study reveals a calreticulin-dependent pro-invasive potential and suggests possible contributing pathways. Defining the mechanistic role of invasion and characterizing the possible calreticulin-dependent molecular targets will be the focus of future work.
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Affiliation(s)
- Mohammadreza Zamanian
- />Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
- />Medical Genetics Laboratory, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan Malaysia
| | - Lama Abdel Qader Hamadneh
- />Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman, 11733 Jordan
| | - Abhi Veerakumarasivam
- />Medical Genetics Laboratory, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan Malaysia
- />Perdana University Graduate School of Medicine, Perdana University, 43400 Serdang, Selangor Darul Ehsan Malaysia
| | - Sabariah Abdul Rahman
- />Cluster of Medical Laboratory Sciences, Faculty of Medicine, Universiti Teknologi MARA, Selayang Campus, 68100 Batu Caves, Selangor Malaysia
| | - Shamarina Shohaimi
- />Department of Biology, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Malaysia
| | - Rozita Rosli
- />Medical Genetics Laboratory, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan Malaysia
- />UPM-MAKNA Cancer Research Laboratory, Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor Malaysia
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11
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Sun Y, Liu WZ, Liu T, Feng X, Yang N, Zhou HF. Signaling pathway of MAPK/ERK in cell proliferation, differentiation, migration, senescence and apoptosis. J Recept Signal Transduct Res 2015; 35:600-4. [DOI: 10.3109/10799893.2015.1030412] [Citation(s) in RCA: 902] [Impact Index Per Article: 100.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Dembitz V, Lalic H, Ostojic A, Vrhovac R, Banfic H, Visnjic D. The mechanism of synergistic effects of arsenic trioxide and rapamycin in acute myeloid leukemia cell lines lacking typical t(15;17) translocation. Int J Hematol 2015; 102:12-24. [PMID: 25758096 DOI: 10.1007/s12185-015-1776-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 02/27/2015] [Accepted: 03/02/2015] [Indexed: 11/28/2022]
Abstract
Arsenic trioxide (ATO) has potent clinical activity in the treatment of patients with acute promyelocytic leukemia (APL), but is much less efficacious in acute myeloid leukemia (AML) lacking t(15;17) translocation. Recent studies have indicated that the addition of mammalian target of rapamycin (mTOR) inhibitors may increase the sensitivity of malignant cells to ATO. The aim of the present study was to test for possible synergistic effects of ATO and rapamycin at therapeutically achievable doses in non-APL AML cells. In HL-60 and U937 cell lines, the inhibitory effects of low concentrations of ATO and rapamycin were synergistic and more pronounced in U937 cells. The combination of drugs increased apoptosis in HL-60 cells and increased the percentage of cells in G(0)/G(1) phase in both cell lines. In U937 cells, rapamycin alone increased the activity of mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK) and the addition of ATO decreased the level of phosphorylated ERK, Ser473 phosphorylated Akt and anti-apoptotic Mcl-1 protein. Primary AML cells show high sensitivity to growth-inhibitory effects of rapamycin alone or in combination with ATO. The results of the present study reveal the mechanism of the synergistic effects of two drugs at therapeutically achievable doses in non-APL AML cells.
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Affiliation(s)
- Vilma Dembitz
- Department of Physiology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Salata 3, POB 978, 10 000, Zagreb, Croatia
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13
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Lalic H, Dembitz V, Lukinovic-Skudar V, Banfic H, Visnjic D. 5-Aminoimidazole-4-carboxamide ribonucleoside induces differentiation of acute myeloid leukemia cells. Leuk Lymphoma 2014; 55:2375-83. [PMID: 24359245 DOI: 10.3109/10428194.2013.876633] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Adenosine monophosphate (AMP)-activated kinase (AMPK) modulators have been shown to exert cytotoxic activity in hematological malignancies, but their role in the differentiation of acute myeloid leukemia (AML) is less explored. In this study, the effects of AMPK agonists on all-trans retinoic acid (ATRA)-mediated differentiation of acute promyelocytic leukemia (APL) and non-APL AML cell lines were investigated. The results show that AMPK agonists inhibit the growth of myeloblastic HL-60, promyelocytic NB4 and monocytic U937 cells. 5-Aminoimidazole-4-carboxamide ribonucleoside (AICAR), an AMPK activator, enhances ATRA-mediated differentiation of NB4 cells. In U937 cells, AICAR alone induces the expression of cell surface markers associated with mature monocytes and macrophages. In both cell lines, AICAR increases the activity of mitogen-activated protein kinase (MAPK), and the presence of a MAPK inhibitor reduces the expression of differentiation markers. These results reveal beneficial effects of AICAR in AML, including differentiation of non-APL AML cells.
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Affiliation(s)
- Hrvoje Lalic
- Department of Physiology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb , Croatia
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14
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Abstract
Protein phosphatase 2A (PP2A), one of the main serine-threonine phosphatases in mammalian cells, maintains cell homoeostasis by counteracting most of the kinase-driven intracellular signalling pathways. Unrestrained activation of oncogenic kinases together with inhibition of tumour suppressors is often required for development of cancer. PP2A has been shown to be genetically altered or functionally inactivated in many solid cancers and leukaemias, and is therefore a tumour suppressor. For example, the phosphatase activity of PP2A is suppressed in chronic myeloid leukaemia and other malignancies characterised by aberrant activity of oncogenic kinases. Preclinical studies show that pharmacological restoration of PP2A tumour-suppressor activity by PP2A-activating drugs (eg, FTY720) effectively antagonises cancer development and progression. Here, we discuss PP2A as a druggable tumour suppressor in view of the possible introduction of PP2A-activating drugs into anticancer therapeutic protocols.
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Affiliation(s)
- Danilo Perrotti
- Human Cancer Genetics Program, Department of Molecular Virology, Immunology, and Medical Genetics, and Comprehensive Cancer Center, Ohio State University, Columbus, OH 43210-2207, USA.
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15
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Lourenço J, Pereira R, Gonçalves F, Mendo S. SSH gene expression profile of Eisenia andrei exposed in situ to a naturally contaminated soil from an abandoned uranium mine. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 88:16-25. [PMID: 23164450 DOI: 10.1016/j.ecoenv.2012.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 10/12/2012] [Accepted: 10/13/2012] [Indexed: 06/01/2023]
Abstract
The effects of the exposure of earthworms (Eisenia andrei) to contaminated soil from an abandoned uranium mine, were assessed through gene expression profile evaluation by Suppression Subtractive Hybridization (SSH). Organisms were exposed in situ for 56 days, in containers placed both in a contaminated and in a non-contaminated site (reference). Organisms were sampled after 14 and 56 days of exposure. Results showed that the main physiological functions affected by the exposure to metals and radionuclides were: metabolism, oxireductase activity, redox homeostasis and response to chemical stimulus and stress. The relative expression of NADH dehydrogenase subunit 1 and elongation factor 1 alpha was also affected, since the genes encoding these enzymes were significantly up and down-regulated, after 14 and 56 days of exposure, respectively. Also, an EST with homology for SET oncogene was found to be up-regulated. To the best of our knowledge, this is the first time that this gene was identified in earthworms and thus, further studies are required, to clarify its involvement in the toxicity of metals and radionuclides. Considering the results herein presented, gene expression profiling proved to be a very useful tool to detect earthworms underlying responses to metals and radionuclides exposure, pointing out for the detection and development of potential new biomarkers.
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Affiliation(s)
- Joana Lourenço
- Departamento de Biologia, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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16
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Wu B. On the geometric modeling approach to empirical null distribution estimation for empirical Bayes modeling of multiple hypothesis testing. Comput Biol Chem 2012; 43:17-22. [PMID: 23314152 DOI: 10.1016/j.compbiolchem.2012.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 11/26/2012] [Accepted: 12/03/2012] [Indexed: 12/11/2022]
Abstract
We study the geometric modeling approach to estimating the null distribution for the empirical Bayes modeling of multiple hypothesis testing. The commonly used method is a nonparametric approach based on the Poisson regression, which however could be unduly affected by the dependence among test statistics and perform very poorly under strong dependence. In this paper, we explore a finite mixture model based geometric modeling approach to empirical null distribution estimation and multiple hypothesis testing. Through simulations and applications to two public microarray data, we will illustrate its competitive performance.
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Affiliation(s)
- Baolin Wu
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN 55455, USA.
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17
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Hong WX, Yang L, Chen M, Yang X, Ren X, Fang S, Ye J, Huang H, Peng C, Zhou L, Huang X, Yang F, Wu D, Zhuang Z, Liu J. Proteomic analysis of trichloroethylene-induced alterations in expression, distribution, and interactions of SET/TAF-Iα and two SET/TAF-Iα-binding proteins, eEF1A1 and eEF1A2, in hepatic L-02 cells. Toxicol Appl Pharmacol 2012; 263:259-72. [DOI: 10.1016/j.taap.2012.06.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 06/24/2012] [Accepted: 06/25/2012] [Indexed: 12/01/2022]
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18
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Regulation of dendritic cell development by GM-CSF: molecular control and implications for immune homeostasis and therapy. Blood 2012; 119:3383-93. [PMID: 22323450 DOI: 10.1182/blood-2011-11-370130] [Citation(s) in RCA: 238] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Dendritic cells (DCs) represent a small and heterogeneous fraction of the hematopoietic system, specialized in antigen capture, processing, and presentation. The different DC subsets act as sentinels throughout the body and perform a key role in the induction of immunogenic as well as tolerogenic immune responses. Because of their limited lifespan, continuous replenishment of DC is required. Whereas the importance of GM-CSF in regulating DC homeostasis has long been underestimated, this cytokine is currently considered a critical factor for DC development under both steady-state and inflammatory conditions. Regulation of cellular actions by GM-CSF depends on the activation of intracellular signaling modules, including JAK/STAT, MAPK, PI3K, and canonical NF-κB. By directing the activity of transcription factors and other cellular effector proteins, these pathways influence differentiation, survival and/or proliferation of uncommitted hematopoietic progenitors, and DC subset–specific precursors, thereby contributing to specific aspects of DC subset development. The specific intracellular events resulting from GM-CSF–induced signaling provide a molecular explanation for GM-CSF–dependent subset distribution as well as clues to the specific characteristics and functions of GM-CSF–differentiated DCs compared with DCs generated by fms-related tyrosine kinase 3 ligand. This knowledge can be used to identify therapeutic targets to improve GM-CSF–dependent DC-based strategies to regulate immunity.
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19
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Lu J, Zhao J, Zhao J, Ma J, Liu K, Yang H, Huang Y, Qin Z, Bai R, Li P, Yan W, Zhao M, Dong Z. VEGF-A-induced immature DCs not mature DCs differentiation into endothelial-like cells through ERK1/2-dependent pathway. Cell Biochem Funct 2011; 29:294-302. [DOI: 10.1002/cbf.1752] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 02/14/2011] [Accepted: 02/18/2011] [Indexed: 11/08/2022]
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20
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Lu J, Zhao J, Liu K, Zhao J, Yang H, Huang Y, Qin Z, Bai R, Li P, Ma J, Yan W, Zhao M, Dong Z. MAPK/ERK1/2 signaling mediates endothelial-like differentiation of immature DCs in the microenvironment of esophageal squamous cell carcinoma. Cell Mol Life Sci 2010; 67:2091-106. [PMID: 20221785 PMCID: PMC11115913 DOI: 10.1007/s00018-010-0316-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 02/09/2010] [Accepted: 02/15/2010] [Indexed: 10/19/2022]
Abstract
Endothelial-like differentiation of dendritic cells (DCs) is a new phenomenon, and the mechanism is still elusive. Here, we show that the tumor microenvironment derived from the human esophageal squamous cell carcinoma (ESCC) cell line EC9706 can induce immature DCs (iDCs) differentiate toward endothelial cells, and become endothelial-like cells, but it has no obvious influence on mature DCs. During the course of endothelial-like differentiation of iDCs, a sustained activation of mitogen-activated protein kinase/extracelluar signal-regulated kinase1/2 (MAPK/ERK1/2) and cAMP response element-binding protein (CREB) was detected. Incubation of iDCs with MEK phosphorylation inhibitor PD98059 blocked the MAPK/ERK1/2 and CREB phosphorylation as well as the endothelial-like differentiation of iDCs. Inhibition of vascular endothelial growth factor-A (VEGF-A) in the microenvironment with its antibody blocked the endothelial-like differentiation and the phosphorylation of MAPK/ERK1/2 and CREB. These data suggest that MAPK/ERK1/2 signaling pathway activated by VEGF-A could mediate endothelial-like differentiation of iDCs in the ESCC microenvironment.
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Affiliation(s)
- Jing Lu
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450052, China.
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21
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Ly L, Wasinger VC. Mass and charge selective protein fractionation for the differential analysis of T-cell and CD34+ stem cell proteins from cord blood. J Proteomics 2010; 73:571-8. [DOI: 10.1016/j.jprot.2009.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Revised: 08/11/2009] [Accepted: 09/02/2009] [Indexed: 12/11/2022]
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22
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TSPY and its X-encoded homologue interact with cyclin B but exert contrasting functions on cyclin-dependent kinase 1 activities. Oncogene 2008; 27:6141-50. [DOI: 10.1038/onc.2008.206] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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23
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Yang J, Zhang S, Zhou Q, Guo H, Zhang K, Zheng R, Xiao C. PKHD1 gene silencing may cause cell abnormal proliferation through modulation of intracellular calcium in autosomal recessive polycystic kidney disease. BMB Rep 2007; 40:467-74. [PMID: 17669261 DOI: 10.5483/bmbrep.2007.40.4.467] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Autosomal recessive polycystic kidney disease (ARPKD) is one of the important genetic disorders in pediatric practice. Mutation of the polycystic kidney and hepatic disease gene 1 (PKHD1) was identified as the cause of ARPKD. The gene encodes a 67-exon transcript for a large protein of 4074 amino acids termed fibrocystin, but its function remains unknown. The neoplastic-like in cystic epithelial proliferation and the epidermal growth factor/epidermal growth factor receptor (EGF/EGFR) axis overactivity are known as the most important characteristics of ARPKD. Since the misregulation of Ca(2+) signaling may lead to aberrant structure and function of the collecting ducts in kidney of rat with ARPKD, present study aimed to investigate the further mechanisms of abnormal proliferation of cystic cells by inhibition of PKHD1 expression. For this, a stable PKHD1-silenced HEK-293T cell line was established. Then cell proliferation rates, intracellular Ca(2+) concentration and extracellular signal-regulated kinase 1/2 (ERK1/2) activity were assessed after treatment with EGF, a calcium channel blocker and agonist, verapamil and Bay K8644. It was found that PKHD1-silenced HEK-293T cell lines were hyperproliferative to EGF stimulation. Also PKHD1-silencing lowered the intracellular Ca(2+) and caused EGF-induced ERK1/2 overactivation in the cells. An increase of intracellular Ca(2+) in PKHD1-silenced cells repressed the EGF-dependent ERK1/2 activation and the hyperproliferative response to EGF stimulation. Thus, inhibition of PKHD1 can cause EGF-induced excessive proliferation through decreasing intracellular Ca(2+) resulting in EGF-induced ERK1/2 activation. Our results suggest that the loss of fibrocystin may lead to abnormal proliferation in kidney epithelial cells and cyst formation in ARPKD by modulation of intracellular Ca(2+).
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Affiliation(s)
- Jiyun Yang
- Department of Medical Genetics, West China Hospital, Sichuan University, Guoxue Xiang No. 37, Chengdu 610041, PR China
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24
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Qu D, Zhang Y, Ma J, Guo K, Li R, Yin Y, Cao X, Park DS. The nuclear localization of SET mediated by impalpha3/impbeta attenuates its cytosolic toxicity in neurons. J Neurochem 2007; 103:408-22. [PMID: 17608644 DOI: 10.1111/j.1471-4159.2007.04747.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
SET is a multi-functional protein in proliferating cells. Some of the proposed functions of SET suggest an important nuclear role. However, the nuclear import pathway of SET is also unknown and the function of SET in neurons is unclear. Presently, using cortical neurons, we report that the nuclear import of SET is mediated by an impalpha/impbeta-dependent pathway. Nuclear localization signal, (168)KRSSQTQNKASRKR(181), in SET interacts with impalpha3, which recruits impbeta to form a ternary complex, resulting in efficient transportation of SET into nucleus. By in vitro nuclear import assay based on digitonin-permeabilized neurons, we further demonstrated that the nuclear import of SET relies on Ran GTPase. We provide evidence that this nuclear localization of SET is important in neuronal survival. Under basal conditions, SET is predominately nuclear. However, upon death induced by genotoxic stress, endogenous SET decreases in the nucleus and increases in the cytoplasm. Consistent with a toxic role of SET in the cytoplasm, targeted expression of SET to the cytoplasm exacerbates death compared to wild type SET expression which is protective following DNA damage. Taken together, our results indicate that SET is imported into the nucleus through its association with impalpha3/impbeta, and that localization of SET is important in regulation of neuronal death.
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Affiliation(s)
- Dianbo Qu
- Institute of Molecular and Cell Biology, Proteos, Singapore, Singapore.
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25
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Herrmann TL, Agrawal RS, Connolly SF, McCaffrey RL, Schlomann J, Kusner DJ. MHC Class II levels and intracellular localization in human dendritic cells are regulated by calmodulin kinase II. J Leukoc Biol 2007; 82:686-99. [PMID: 17586661 DOI: 10.1189/jlb.0107045] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Dendritic cells (DC) are professional APC, which activate the adaptive immune response. A Ca2+-calmodulin (CaM)-CaM kinase II (CaMKII) pathway regulates maturation and MHC Class II antigen presentation in human DC. The objective of this study was to characterize the mechanisms by which CaMKII modulates the levels and subcellular distribution of MHC Class II molecules. Inhibition of CaMKII via the highly specific, autoinhibitory peptide derived from the enzyme's regulatory domain resulted in rapid (60 min) and sustained (24 h) reduction of MHC Class II levels in antigen-stimulated, primary, human DC. The initial depletion of intracellular and cell surface MHC Class II was associated with its enhanced lysosomal trafficking and increased activity of specific proteases in the absence of effects on other transmembrane proteins (CD1b and CD34) or a detectable change in lysosomal degradation of exogenous protein. Inhibition of CaMKII also resulted in significant reductions in the level and stability of MHC Class II mRNA and the levels and nucleocytosolic localization of its major transcriptional regulator CIITA. These data support a model in which CaMKII regulates the levels and localization of MHC Class II protein in human DC via transcriptional, post-transcriptional, and post-translational mechanisms. These pathways are likely important to the physiologic regulation of MHC Class II as well as to its dysregulation in disease states associated with altered CaMKII function.
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Affiliation(s)
- Tara L Herrmann
- The Inflammation Program, Division of Infectious Diseases, University of Iowa Carver College of Medicine, 200 Hawkins Dr., SW 54-8, GH, Iowa City, IA 52242, USA
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26
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Henrich S, Cordwell SJ, Crossett B, Baker MS, Christopherson RI. The nuclear proteome and DNA-binding fraction of human Raji lymphoma cells. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2007; 1774:413-32. [PMID: 17369005 DOI: 10.1016/j.bbapap.2006.12.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2006] [Revised: 11/26/2006] [Accepted: 12/20/2006] [Indexed: 12/17/2022]
Abstract
Purification of organelles and analysis of their proteins is an important initial step for biological proteomics, simplifying the proteome prior to analysis by established techniques such as two-dimensional liquid chromatography (2-DLC) or two-dimensional gel electrophoresis (2-DE). Nuclear proteins play a central role in regulating gene expression, but are often under-represented in proteomic studies due to their lower abundance in comparison to cellular 'housekeeping' metabolic enzymes and structural proteins. A reliable procedure for separation and proteomic analysis of nuclear proteins would be useful for investigations of cell proliferation and differentiation during disease processes (e.g., human cancer). In this study, we have purified nuclei from the human Burkitt's lymphoma B-cell line, Raji, using sucrose density gradient centrifugation. The integrity and purity of the nuclei were assessed by light microscopy and proteins from the nuclear fractions were separated by 2-DE and identified using matrix assisted laser desorption ionization mass spectrometry (MALDI-MS). A total of 124 unique proteins were identified, of which 91% (n=110) were predicted to be nuclear using PSORT. Proteins from the nuclear fraction were subjected to affinity chromatography on DNA-agarose to isolate DNA-binding proteins. From this purified fraction, 131 unique proteins were identified, of which 69% (n=90) were known or predicted DNA-binding proteins. Purification of nuclei and subsequent enrichment of DNA-binding proteins allowed identification of a total of 209 unique proteins, many involved in transcription and/or correlated with lymphoma, leukemia or cancer in general. The data obtained should be valuable for identification of biomarkers and targets for cancer therapy, and for furthering our understanding of the molecular mechanisms underlying lymphoma development and progression.
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Affiliation(s)
- Silke Henrich
- School of Molecular and Microbial Biosciences, University of Sydney, Sydney, NSW, Australia
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27
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Gee K, Angel JB, Mishra S, Blahoianu MA, Kumar A. IL-10 regulation by HIV-Tat in primary human monocytic cells: involvement of calmodulin/calmodulin-dependent protein kinase-activated p38 MAPK and Sp-1 and CREB-1 transcription factors. THE JOURNAL OF IMMUNOLOGY 2007; 178:798-807. [PMID: 17202341 DOI: 10.4049/jimmunol.178.2.798] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The anti-inflammatory cytokine, IL-10 plays an important role in HIV immunopathogenesis. The HIV accessory protein, Tat is not only critical for viral replication, but affects the host immune system by influencing cytokine production including IL-10. During HIV infection, IL-10 production by monocytic cells is up-regulated, representing a critical pathway by which HIV may induce immunodeficiency. Herein, we show that extracellular Tat-induced IL-10 expression in normal human monocytes. To understand the signaling pathways underlying HIV-Tat induced IL-10 transcription, we investigated the involvement of MAPK as well as calcium signaling and the downstream transcription factor(s). Our results suggest that Tat-induced calcium influx regulated IL-10 transcription in monocytic cells. The experiments designed to further understand the molecules involved in the calcium signaling suggested that calmodulin and calmodulin-dependent protein kinase-II (CaMK-II)-activated p38 MAPK played a role in extracellular Tat-induced IL-10 expression in primary human monocytes. Furthermore, Tat-induced IL-10 expression was regulated by p38 MAPK- and CaMK II-activated CREB-1 as well as Sp-1 transcription factors. Taken together, our results suggest that extracellular HIV-Tat induced IL-10 transcription in primary human monocytes is regulated by CREB-1 and Sp-1 transcription factors through the activation of calmodulin/CaMK-II-dependent p38 MAPK.
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Affiliation(s)
- Katrina Gee
- Department of Pathology and Laboratory Medicine, Division of Virology and Molecular Immunology, Children's Hospital of Eastern Ontario, 401 Smyth Road, Ottawa, Ontario, Canada
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28
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Jin JO, Park HY, Kim JW, Park JI, Hong YS, Min DS, Kwak JY. Phosphatidic acid induces the differentiation of human acute promyelocytic leukemic cells into dendritic cell-like. J Cell Biochem 2007; 100:191-203. [PMID: 16924673 DOI: 10.1002/jcb.21054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
We investigated whether phosphatidic acid (PA) can differentiate the promyelocytic leukemia (PML)-retinoic acid receptor alpha (RAR alpha)-expressing acute promyelocytic leukemic cell line, NB4, to dendritic cell (DC)-like cells. Dioctanoyl-PA alone upregulated the expression of DC markers. The expression of DC markers on NB4 cells was potentiated by the overexpression of phospholipase D and upregulation was blocked by the addition of n-butanol, an inhibitor of PA production. The expression of CD11c, CD83, and CCR7 in PA-treated NB4 cells was further increased by tumor necrosis factor (TNF)-alpha treatment. Increased functional capacities were also found in PA-differentiated and TNF-alpha-activated NB4 cells with respect to changes in T-cell proliferation, cytokine production, endocytic activity, and cytolytic capacity against undifferentiated NB4 cells. PA alone increased the phosphorylation of extracellular signal-regulated kinase (ERK)-1/2. The expression of DC markers was downregulated by PD98059, a specific inhibitor of ERK kinase or transient transfection of mutant-ERK. The level of PML-RAR alpha fusion protein was decreased by PA treatment and PD98059 blocked the decrease of PML-RAR alpha. These results suggest that PA induces differentiation of NB4 cells into DC-like cells and that the upregulation of antigen presenting cell markers is mediated by the activation of ERK and the downregulation of PML-RAR alpha levels.
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Affiliation(s)
- Jun-O Jin
- Medical Research Center for Cancer Molecular Therapy, Dong-A University, Busan 602-714, Korea
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29
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Kato K, Miyaji-Yamaguchi M, Okuwaki M, Nagata K. Histone acetylation-independent transcription stimulation by a histone chaperone. Nucleic Acids Res 2006; 35:705-15. [PMID: 17179179 PMCID: PMC1807960 DOI: 10.1093/nar/gkl1077] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Histone chaperones are thought to be important for maintaining the physiological activity of histones; however, their exact roles are not fully understood. The physiological function of template activating factor (TAF)-I, one of the histone chaperones, also remains unclear; however, its biochemical properties have been well studied. By performing microarray analyses, we found that TAF-I stimulates the transcription of a sub-set of genes. The transcription of endogenous genes that was up-regulated by TAF-I was found to be additively stimulated by histone acetylation. On performing an experiment with a cell line containing a model gene integrated into the chromosome, TAF-I was found to stimulate the model gene transcription in a histone chaperone activity-dependent manner additively with histone acetylation. TAF-I bound to the core histones and remodeled the chromatin structure independent of the N-terminal histone tail and its acetylation level in vitro. These results suggest that TAF-I remodel the chromatin structure through its interaction with the core domain of the histones, including the histone fold, and this mechanism is independent of the histone acetylation status.
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Affiliation(s)
| | | | | | - Kyosuke Nagata
- To whom correspondence should be addressed. Tel: +81 29 853 3233; Fax: +81 29 853 3233;
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