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Moustafa A, Hashemi S, Brar G, Grigull J, Ng SHS, Williams D, Schmitt-Ulms G, McDermott JC. The MEF2A transcription factor interactome in cardiomyocytes. Cell Death Dis 2023; 14:240. [PMID: 37019881 PMCID: PMC10076289 DOI: 10.1038/s41419-023-05665-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 12/02/2022] [Accepted: 02/08/2023] [Indexed: 04/07/2023]
Abstract
Transcriptional regulators encoded by the Myocyte Enhancer Factor 2 (MEF2) gene family play a fundamental role in cardiac development, homeostasis and pathology. Previous studies indicate that MEF2A protein-protein interactions serve as a network hub in several cardiomyocyte cellular processes. Based on the idea that interactions with regulatory protein partners underly the diverse roles of MEF2A in cardiomyocyte gene expression, we undertook a systematic unbiased screen of the MEF2A protein interactome in primary cardiomyocytes using an affinity purification-based quantitative mass spectrometry approach. Bioinformatic processing of the MEF2A interactome revealed protein networks involved in the regulation of programmed cell death, inflammatory responses, actin dynamics and stress signaling in primary cardiomyocytes. Further biochemical and functional confirmation of specific protein-protein interactions documented a dynamic interaction between MEF2A and STAT3 proteins. Integration of transcriptome level data from MEF2A and STAT3-depleted cardiomyocytes reveals that the balance between MEF2A and STAT3 activity exerts a level of executive control over the inflammatory response and cardiomyocyte cell survival and experimentally ameliorates Phenylephrine induced cardiomyocyte hypertrophy. Lastly, we identified several MEF2A/STAT3 co-regulated genes, including the MMP9 gene. Herein, we document the cardiomyocyte MEF2A interactome, which furthers our understanding of protein networks involved in the hierarchical control of normal and pathophysiological cardiomyocyte gene expression in the mammalian heart.
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Affiliation(s)
- Amira Moustafa
- Department of Biology, York University, Toronto, ON, M3J 1P3, Canada
- Muscle Health Research Centre (MHRC), York University, Toronto, ON, M3J 1P3, Canada
- Centre for Research in Biomolecular Interactions (CRBI), York University, Toronto, ON, M3J 1P3, Canada
| | - Sara Hashemi
- Analytical Sciences, Sanofi, Toronto, ON, M2R 3T4, Canada
- Seneca College, School of Health Sciences, King City, ON, L7B 1B3, Canada
| | - Gurnoor Brar
- Department of Biology, York University, Toronto, ON, M3J 1P3, Canada
- Muscle Health Research Centre (MHRC), York University, Toronto, ON, M3J 1P3, Canada
- Centre for Research in Biomolecular Interactions (CRBI), York University, Toronto, ON, M3J 1P3, Canada
| | - Jörg Grigull
- Department of Mathematics and Statistics, York University, Toronto, ON, M3J1P3, Canada
| | - Siemon H S Ng
- Analytical Sciences, Sanofi, Toronto, ON, M2R 3T4, Canada
- Analytical Development, Notch Therapeutics, Toronto, ON, M5G 1M1, Canada
| | - Declan Williams
- Tanz Centre for Research in Neurodegenerative Diseases, and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, M5T 0S8, Canada
| | - Gerold Schmitt-Ulms
- Tanz Centre for Research in Neurodegenerative Diseases, and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, M5T 0S8, Canada
| | - John C McDermott
- Department of Biology, York University, Toronto, ON, M3J 1P3, Canada.
- Muscle Health Research Centre (MHRC), York University, Toronto, ON, M3J 1P3, Canada.
- Centre for Research in Biomolecular Interactions (CRBI), York University, Toronto, ON, M3J 1P3, Canada.
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Zhang J, Zheng L, Zheng C, Sun P. A Comparison of Three Cylindrical Treatment Strategies for Topography-Guided LASIK: Manifest, Topographic, and ZZ VR Cylinders. Clin Ophthalmol 2023; 17:1335-1345. [PMID: 37192993 PMCID: PMC10182812 DOI: 10.2147/opth.s408101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/01/2023] [Indexed: 05/18/2023] Open
Abstract
Purpose This study was designed to compare the clinical outcomes of three cylindrical treatment strategies using manifest, topographic, and Zhang & Zheng vector-compensated refraction (ZZ VR) cylinders, for topography-guided laser-assisted in situ keratomileusis (LASIK) and to identify the laser programming strategy that optimizes refractive astigmatism outcomes and visual acuity. Methods Consecutive patients referred for therapeutic refractive surgery between March and September 2018 at a single center were prospectively analyzed. Using double-masked simple randomization, patients were randomly assigned to undergo treatment based on manifest cylinder, topographic cylinder, and ZZ VR cylinder strategies. Uncorrected distance visual acuity and astigmatic refraction were analyzed preoperatively and 6 months postoperatively. Results A total of 138 eyes from 71 patients met the inclusion criteria. The manifest group consisted of 46 eyes in 24 patients, the topographic group consisted of 43 eyes in 22 patients, and the ZZ VR group consisted of 49 eyes in 25 patients. The absolute residual cylindrical refractions at 6 months postoperatively in these three groups were 0.69 ± 0.32 D, 0.58 ± 0.31 D, and 0.42 ± 0.19 D, respectively (P < 0.001; adjusted P < 0.01 for manifest vs ZZ VR, adjusted P = 0.08 for topographic vs ZZ VR). The percentages of postoperative absolute residual cylindrical power within 0.50 D in the manifest, topographic, and ZZ VR groups were 30.4%, 55.8%, and 59.2%, respectively (P = 0.01; adjusted P = 0.06 for manifest vs topographic, adjusted P = 0.02 for manifest vs ZZ VR). Conclusion The ZZ VR strategy may achieve better outcomes, as determined by cylindrical correction and visual activity, during topography-guided LASIK. Clinical Trial Registration Number ChiCTR1900025779.
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Affiliation(s)
- Jun Zhang
- Department of Ophthalmology, Hangzhou MSK Eye Hospital, Hangzhou, People’s Republic of China
- Correspondence: Jun Zhang, Email
| | - Li Zheng
- Department of Ophthalmology, Hangzhou MSK Eye Hospital, Hangzhou, People’s Republic of China
| | - Chenyao Zheng
- Department of Ophthalmology, Hangzhou MSK Eye Hospital, Hangzhou, People’s Republic of China
| | - Peihong Sun
- Department of Ophthalmology, Hangzhou MSK Eye Hospital, Hangzhou, People’s Republic of China
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Wang YY, Gao B, Yang Y, Jia SB, Ma XP, Zhang MH, Wang LJ, Ma AQ, Zhang QN. Histone deacetylase 3 suppresses the expression of SHP-1 via deacetylation of DNMT1 to promote heart failure. Life Sci 2021; 292:119552. [PMID: 33932446 DOI: 10.1016/j.lfs.2021.119552] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 04/14/2021] [Accepted: 04/19/2021] [Indexed: 10/21/2022]
Abstract
AIMS Heart failure (HF) is a progressive disease with recurrent hospitalizations and high mortality. However, the mechanisms underlying HF remain unclear. The present study aimed to explore the regulatory mechanism of histone deacetylase 3 (HDAC3) and DNA methyltransferase 1 (DNMT1)/Src homology domain 2-containing tyrosine phosphatase-1 (SHP-1) axis in HF. METHODS The HF rat models and hypertrophy cell models were established. The characteristic parameters of the heart were detected by echocardiography. A multichannel physiological signal acquisition system was used to detect the hemodynamic parameters. Real-time quantitative polymerase chain reaction (RT-qPCR) was used to detect the expression of HDAC3, DNMT1, and SHP-1 mRNAs, while Western blot was applied to analyze the expression of proteins. Masson staining was used to analyze the degree of collagen fiber infiltration. TdT-mediated DUTP nick end labeling (TUNEL) staining was performed to analyze the apoptosis of myocardial tissue cells. Co-immunoprecipitation (co-IP) was conducted to study the interaction between HDAC3 and DNMT1. Flow cytometry was used to analyze the apoptosis. KEY FINDINGS HDAC3 and DNMT1 were highly expressed in HF rat and hypertrophy cell models. HDAC3 modified DNMT1 through deacetylation to inhibit ubiquitination-mediated degradation, which promoted the expression of DNMT1. DNMT1 inhibited SHP-1 expression via methylation in the promoter region. In summary, HDAC3 modified DNMT1 by deacetylation to suppress SHP-1 expression, which in turn led to the development of cardiomyocyte hypertrophy-induced HF. SIGNIFICANCE This study provided potential therapeutic targets for HF treatment.
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Affiliation(s)
- Yi-Yong Wang
- Department of Cardiovascular Medicine, General Hospital of Ningxia Medical University, China; Department of Cardiovascular Internal Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Bin Gao
- Department of Cardiology, Zhongwei City People Hospital, China
| | - Yong Yang
- Department of Cardiovascular Internal Medicine, Shenzhen Hospital of Southern Medical University, Shenzhen, Guangdong, China
| | - Shao-Bin Jia
- Department of Cardiovascular Medicine, General Hospital of Ningxia Medical University, China
| | - Xue-Ping Ma
- Department of Cardiovascular Medicine, General Hospital of Ningxia Medical University, China
| | - Ming-Hao Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, China; School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| | - Li-Juan Wang
- Department of Cardiovascular Medicine, The Second People's Hospital of Yinchuan City, China
| | - Ai-Qun Ma
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, China; Key Laboratory of Molecular Cardiology, Shaanxi Province, China; Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, China.
| | - Qin-Ning Zhang
- School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
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Bernardo PS, Lemos LGT, de Moraes GN, Maia RC. Unraveling survivin expression in chronic myeloid leukemia: Molecular interactions and clinical implications. Blood Rev 2020; 43:100671. [PMID: 32107072 DOI: 10.1016/j.blre.2020.100671] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/15/2020] [Accepted: 01/30/2020] [Indexed: 02/07/2023]
Abstract
Chronic myeloid leukemia (CML) is a myeloproliferative disorder characterized by the BCR-ABL oncoprotein, known to drive leukemogenesis by orchestrating multiple signaling pathways ultimately involved in cell survival. Despite successful response rates of CML patients to tyrosine kinase inhibitors (TKIs), resistance eventually arises due to BCR-ABL-dependent and independent mechanisms. Survivin is an inhibitor of apoptosis protein acting in the interface between apoptosis deregulation and cell cycle progression. In CML, high levels of survivin have been associated with late stages of disease and therapy resistance. In this review, we provide an overview of important aspects concerning survivin subcellular localization and expression pattern in CML patients and cell lines. Moreover, we highlight the relevance of molecular networks involving survivin for disease progression and treatment resistance. Finally, we discuss the mechanisms accounting for survivin overexpression, as well as novel therapeutic interventions that have been designed to counteract survivin-associated malignancy in CML.
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Affiliation(s)
- Paula Sabbo Bernardo
- Laboratory of Cellular and Molecular Hemato-Oncology, Program of Molecular Hemato-Oncology, Brazilian National Cancer Institute (INCA), Rio de Janeiro, RJ, Brazil
| | - Lauana Greicy Tonon Lemos
- Laboratory of Cellular and Molecular Hemato-Oncology, Program of Molecular Hemato-Oncology, Brazilian National Cancer Institute (INCA), Rio de Janeiro, RJ, Brazil
| | - Gabriela Nestal de Moraes
- Laboratory of Cellular and Molecular Hemato-Oncology, Program of Molecular Hemato-Oncology, Brazilian National Cancer Institute (INCA), Rio de Janeiro, RJ, Brazil
| | - Raquel Ciuvalschi Maia
- Laboratory of Cellular and Molecular Hemato-Oncology, Program of Molecular Hemato-Oncology, Brazilian National Cancer Institute (INCA), Rio de Janeiro, RJ, Brazil.
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Farnesiferol C Induces Apoptosis in Chronic Myelogenous Leukemia Cells as an Imatinib Sensitizer via Caspase Activation and HDAC (Histone Deacetylase) Inactivation. Int J Mol Sci 2019; 20:ijms20225535. [PMID: 31698777 PMCID: PMC6888363 DOI: 10.3390/ijms20225535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/30/2019] [Accepted: 11/05/2019] [Indexed: 01/19/2023] Open
Abstract
Herein the underlying apoptotic mechanism of Farnesiferol C (FC) derived from Ferula assafoetida was elucidated in chronic myelogenous leukemia (CML) K562 and KBM5 cells. FC showed significant cytotoxicity in K562 and KBM5 cells, more so than in U937 and UL-60 acute myeloid leukemia (AML) cells. Cleaved PARP and caspase 9/3 attenuated the expression of Bcl2 and induced G1 arrest in K562 and KBM5 cells. Also, FC effectively abrogated the expression of cell cycle related proteins, such as: Cyclin D1, Cyclin E, Cyclin B1 in K562, and KBM5 cells, but caspase 3 inhibitor Z-DEVD-FMK rescued the cleavages of caspase 3 and PARP induced by FC in K562 cells. Of note, FC decreased histone deacetylase 1 (HDAC1) and HDAC2, and enhanced histone H3 acetylation K18 (Ac-H3K18) in K562 and KBM5 cells. Furthermore, combination of FC and Imatinib enhanced the apoptotic effect of Imatinib as a potent Imatinib sensitizer in K562 cells. Overall, our findings provide scientific evidence that inactivation of HDAC and caspase activation mediate FC induced apoptosis in CML cells.
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Lee JYC, Kuo CW, Tsai SL, Cheng SM, Chen SH, Chan HH, Lin CH, Lin KY, Li CF, Kanwar JR, Leung EY, Cheung CCH, Huang WJ, Wang YC, Cheung CHA. Inhibition of HDAC3- and HDAC6-Promoted Survivin Expression Plays an Important Role in SAHA-Induced Autophagy and Viability Reduction in Breast Cancer Cells. Front Pharmacol 2016; 7:81. [PMID: 27065869 PMCID: PMC4814469 DOI: 10.3389/fphar.2016.00081] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 03/14/2016] [Indexed: 11/13/2022] Open
Abstract
SAHA is a class I HDAC/HDAC6 co-inhibitor and an autophagy inducer currently undergoing clinical investigations in breast cancer patients. However, the molecular mechanism of action of SAHA in breast cancer cells remains unclear. In this study, we found that SAHA is equally effective in targeting cells of different breast cancer subtypes and tamoxifen sensitivity. Importantly, we found that down-regulation of survivin plays an important role in SAHA-induced autophagy and cell viability reduction in human breast cancer cells. SAHA decreased survivin and XIAP gene transcription, induced survivin protein acetylation and early nuclear translocation in MCF7 and MDA-MB-231 breast cancer cells. It also reduced survivin and XIAP protein stability in part through modulating the expression and activation of the 26S proteasome and heat-shock protein 90. Interestingly, targeting HDAC3 and HDAC6, but not other HDAC isoforms, by siRNA/pharmacological inhibitors mimicked the effects of SAHA in modulating the acetylation, expression, and nuclear translocation of survivin and induced autophagy in MCF7 and MDA-MB-231 cancer cells. Targeting HDAC3 also mimicked the effect of SAHA in up-regulating the expression and activity of proteasome, which might lead to the reduced protein stability of survivin in breast cancer cells. In conclusion, this study provides new insights into SAHA's molecular mechanism of actions in breast cancer cells. Our findings emphasize the complexity of the regulatory roles in different HDAC isoforms and potentially assist in predicting the mechanism of novel HDAC inhibitors in targeted or combinational therapies in the future.
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Affiliation(s)
- Jane Ying-Chieh Lee
- Department of Pharmacology, College of Medicine, National Cheng Kung University Tainan, Taiwan
| | - Ching-Wen Kuo
- Department of Pharmacology, College of Medicine, National Cheng Kung University Tainan, Taiwan
| | - Shing-Ling Tsai
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University Tainan, Taiwan
| | - Siao Muk Cheng
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University Tainan, Taiwan
| | - Shang-Hung Chen
- Division of Hematology and Oncology, Department of Internal Medicine, Chi-Mei Medical Center Liouying, Tainan, Taiwan
| | - Hsiu-Han Chan
- Department of Pharmacology, College of Medicine, National Cheng Kung University Tainan, Taiwan
| | - Chun-Hui Lin
- Department of Pharmacology, College of Medicine, National Cheng Kung University Tainan, Taiwan
| | - Kun-Yuan Lin
- Department of Pharmacology, College of Medicine, National Cheng Kung University Tainan, Taiwan
| | - Chien-Feng Li
- Department of Pathology, Chi-Mei Medical Center, Yung Kang District Tainan, Taiwan
| | - Jagat R Kanwar
- Nanomedicine-Laboratory of Immunology and Molecular Biology, Faculty of Health, School of Medicine, Deakin University Waurn Ponds, Geelong, VIC, Australia
| | - Euphemia Y Leung
- Auckland Cancer Society Research Centre and Department of Molecular Medicine and Pathology, University of Auckland Auckland, New Zealand
| | - Carlos Chun Ho Cheung
- School of Biological Sciences, Faculty of Science, University of Auckland Auckland, New Zealand
| | - Wei-Jan Huang
- Graduate Institute of Pharmacognosy, Taipei Medical University Taipei, Taiwan
| | - Yi-Ching Wang
- Department of Pharmacology, College of Medicine, National Cheng Kung UniversityTainan, Taiwan; Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung UniversityTainan, Taiwan
| | - Chun Hei Antonio Cheung
- Department of Pharmacology, College of Medicine, National Cheng Kung UniversityTainan, Taiwan; Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung UniversityTainan, Taiwan
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The Lipidomic Analyses in Low and Highly Aggressive Ovarian Cancer Cell Lines. Lipids 2015; 51:179-87. [PMID: 26661829 DOI: 10.1007/s11745-015-4108-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 11/23/2015] [Indexed: 01/06/2023]
Abstract
Despite huge advances in the research of epithelial ovarian cancer (EOC), it remains the most lethal gynecological malignancy. Peritoneal tumor cell dissemination with cell survival and drug-resistance to taxane and platinum-based chemotherapy are two of the major challenges of EOC treatment. We have generated highly aggressive EOC cell lines (ID8-P1 lines or P1) from ID8-P0 (without in vivo passage, or P0) through in vivo passage in mice. We conducted lipidomic analyses in cells from ID8-P0 versus three ID8-P1 cell lines using ultra-high-performance liquid chromatography coupled to electrospray ionization tandem mass spectrometry. A total of 16 classes of lipids (149 individual lipids) were analyzed and compared between P0 and P1 cells. In addition to overall lipid profiles in EOC cells, we had several novel observations. Several classes and species of lipids have been identified to be differentially present in P0 versus P1 cells, which are potentially involved in the acquired aggressiveness of P1 cells. Triacylglycerols (TAG) were dramatically increased under detachment stress in EOC cells. Since survival of EOC cells under detachment is one of the major obstacles for EOC treatment, further studies identifying the molecular mechanisms controlling TAG increase may lead to new treatment modalities for EOC.
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Werlein A, Peters A, Ngoune R, Winkler K, Pütz G. Interference of phosphatidylcholines with in-vitro cell proliferation - no flock without black sheep. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:1599-608. [PMID: 25911997 DOI: 10.1016/j.bbamem.2015.04.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 04/01/2015] [Accepted: 04/16/2015] [Indexed: 01/12/2023]
Abstract
According to early experiments with natural extracts, phosphatidylcholines (PCs) are widely considered essentially non-toxic. In addition to these physiological mixed-chain PCs, many different synthetic diacyl-PCs are currently available, but they have never been systematically evaluated for any interference with cell proliferation. We thus investigated the cell proliferation of several cell lines in the presence of various liposomes consisting of a single PC component and cholesterol. Most of the PCs investigated did not interfere with cell proliferation, supporting the notion that most PCs are safe excipients. Significant IC50 values below 0.5mM were detected for PC(12:0/12:0), PC(14:1/14:1)trans and all diacyl-PCs containing two polyunsaturated fatty acids (PUFAs). The ω-3 PC(22:6/22:6) was the most toxic PC assessed, revealing IC50 values below 100 μM, but no rule concerning ω-3/6 configuration or acyl chain length could be observed. Physiological mixed-chain PCs containing PUFAs were much less toxic than respective non-physiological diacyl-PCs. All trans fatty acids in diacyl-PCs interfered more with proliferation than their respective cis-configured counterparts. Depending on the concentration, those diacyl-PCs not only inhibited proliferation but also induced cell death. Unlike the non-toxic PCs usually used for liposomal drug delivery, the elucidated diacyl-PCs may be worthy of further examination to eventually construct a toxic shell for toxic drugs, thereby enhancing anticancer drug delivery via lipid particles.
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Affiliation(s)
- Anna Werlein
- University Freiburg Medical Center, Institute for Clinical Chemistry, Freiburg, Germany; University Hospital Giessen and Marburg, Department of Pediatrics, Marburg, Germany.
| | - Annette Peters
- University Freiburg Medical Center, Institute for Clinical Chemistry, Freiburg, Germany.
| | - Romeo Ngoune
- University Freiburg Medical Center, Institute for Clinical Chemistry, Freiburg, Germany.
| | - Karl Winkler
- University Freiburg Medical Center, Institute for Clinical Chemistry, Freiburg, Germany.
| | - Gerhard Pütz
- University Freiburg Medical Center, Institute for Clinical Chemistry, Freiburg, Germany.
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Wang YC, Wang JL, Kong X, Sun TT, Chen HY, Hong J, Fang JY. CD24 mediates gastric carcinogenesis and promotes gastric cancer progression via STAT3 activation. Apoptosis 2015; 19:643-56. [PMID: 24327257 DOI: 10.1007/s10495-013-0949-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The development of gastric cancer (GC) is a complex multistep process, including numerous genetic and epigenetic changes. CD24 is associated with enhanced invasiveness of GC and a poor prognosis. However, the mechanism by which CD24 induces GC progression remains poorly characterized. Here, we found that the expression of CD24 gradually increased in samples of normal gastric mucosa, non-atrophic chronic gastritis, chronic atrophic gastritis (CAG), CAG with intestinal metaplasia, dysplasia and GC. Moreover, the knockdown of CD24 induced significant levels of apoptosis in GC cells via the mitochondrial apoptotic pathway. CD24 may also promote cellular invasion and regulate the expression of E-cadherin, fibronectin and vitamin D receptor in GC cells. The activation of signal transducer and activator of transcription 3 (STAT3) may mediate CD24-induced GC survival and invasion in vitro. Furthermore, CD24-induced GC progression and STAT3 activation could also be detected in vivo and in clinical GC tissues samples. Taken together, our results indicate that CD24 mediates gastric carcinogenesis and may promote GC progression by suppressing apoptosis and promoting invasion, with the activation of STAT3 playing a critical role.
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Affiliation(s)
- Ying-Chao Wang
- GI Division, Ren Ji Hospital, School of Medicine, Shanghai Jiao-Tong University, Shanghai Institution of Digestive Disease, Key Laboratory of Gastroenterology & Hepatology, Ministry of Health (Shanghai Jiao-Tong University), State Key Laboratory of Oncogene and Related Genes, 145 Middle Shandong Rd., Shanghai, 200001, China
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