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Sang C, Yan L, Lin J, Lin Y, Gao Q, Shen X. Identification and validation of a lactate metabolism-related six-gene prognostic signature in intrahepatic cholangiocarcinoma. J Cancer Res Clin Oncol 2024; 150:199. [PMID: 38627278 PMCID: PMC11021257 DOI: 10.1007/s00432-024-05723-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 03/22/2024] [Indexed: 04/19/2024]
Abstract
PURPOSE Intrahepatic cholangiocarcinoma (iCCA) is a highly malignant and fatal liver tumor with increasing incidence worldwide. Lactate metabolism has been recently reported as a crucial contributor to tumor progression and immune regulation in the tumor microenvironment. However, it remains poorly identified about the biological functions of lactate metabolism in iCCA, which hinders the development of prognostic tools and therapeutic interventions. METHODS The univariate Cox regression analysis and Boruta algorithm were utilized to identify key lactate metabolism-related genes (LMRGs), and a prognostic signature was constructed based on LMRG scores. Genomic variations and immune cell infiltration were evaluated in the high and low LMRG score groups. Finally, the biological functions of key LMRGs were verified with in vitro and in vivo experiments. RESULTS Patients in the high LMRG score group exhibit a poor prognosis compared to those in the low LMRG score group, with a high frequency of TP53 and KRAS mutations. Moreover, the infiltration and function of NK cells were compromised in the high LMRG score group, consistent with the results from two independent single-cell RNA sequencing datasets and immunohistochemistry of tissue microarrays. Experimental data revealed that lactate dehydrogenase A (LDHA) knockdown inhibited proliferation and migration in iCCA cell lines and tumor growth in immunocompetent mice. CONCLUSION Our study revealed the biological roles of LDHA in iCCA and developed a reliable lactate metabolism-related prognostic signature for iCCA, offering promising therapeutic targets for iCCA in the clinic.
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Affiliation(s)
- Chen Sang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Li Yan
- Department of Hematology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Jian Lin
- Jinshan Hospital Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China
| | - Youpei Lin
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Qiang Gao
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China.
| | - Xia Shen
- Jinshan Hospital Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China.
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2
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Zhang M, Huang Y, Pan J, Sang C, Lin Y, Dong L, Shen X, Wu Y, Song G, Ji S, Liu F, Wang M, Zheng Y, Zhang S, Wang Z, Ren J, Gao D, Zhou J, Fan J, Wei W, Lin J, Gao Q. An Inflammatory Checkpoint Generated by IL1RN Splicing Offers Therapeutic Opportunity for KRAS-Mutant Intrahepatic Cholangiocarcinoma. Cancer Discov 2023; 13:2248-2269. [PMID: 37486241 DOI: 10.1158/2159-8290.cd-23-0282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 06/30/2023] [Accepted: 07/20/2023] [Indexed: 07/25/2023]
Abstract
KRAS mutations are causally linked to protumor inflammation and are identified as driving factors in tumorigenesis. Here, using multiomics data gathered from a large set of patients, we showed that KRAS mutation was associated with a specific landscape of alternative mRNA splicing that connected to myeloid inflammation in intrahepatic cholangiocarcinoma (iCCA). Then, we identified a negative feedback mechanism in which the upregulation of interleukin 1 receptor antagonist (IL1RN)-201/203 due to alternative splicing confers vital anti-inflammatory effects in KRAS-mutant iCCA. In KRAS-mutant iCCA mice, both IL1RN-201/203 upregulation and anakinra treatment ignited a significant antitumor immune response by altering neutrophil recruitment and phenotypes. Furthermore, anakinra treatment synergistically enhanced anti-PD-1 therapy to activate intratumoral GZMB+ CD8+ T cells in KRAS-mutant iCCA mice. Clinically, we found that high IL1RN-201/203 levels in patients with KRAS-mutant iCCA were significantly associated with superior response to anti-PD-1 immunotherapy. SIGNIFICANCE This work describes a novel inflammatory checkpoint mediated by IL1RN alternative splicing variants that may serve as a promising basis to develop therapeutic options for KRAS-mutant iCCA and other cancers. This article is featured in Selected Articles from This Issue, p. 2109.
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Affiliation(s)
- Mao Zhang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Yingying Huang
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Jiaomeng Pan
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Chen Sang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Youpei Lin
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Liangqing Dong
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Xia Shen
- Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China
| | - Yingcheng Wu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Guohe Song
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
| | - Shuyi Ji
- Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China
| | - Fen Liu
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Mengcheng Wang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Yuyan Zheng
- Department of Thoracic Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Sirui Zhang
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Zefeng Wang
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Jianke Ren
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Daming Gao
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Jian Zhou
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
- Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Jia Fan
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
- Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Wu Wei
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
- Lingang Laboratory, Shanghai, China
- Translational Medicine Institute of Jiangxi, The First Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Jian Lin
- Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China
| | - Qiang Gao
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, and Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai, China
- Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
- State Key Laboratory of Genetic Engineering, Fudan University, Shanghai, China
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3
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Ji S, Feng L, Fu Z, Wu G, Wu Y, Lin Y, Lu D, Song Y, Cui P, Yang Z, Sang C, Song G, Cai S, Li Y, Lin H, Zhang S, Wang X, Qiu S, Zhang X, Hua G, Li J, Zhou J, Dai Z, Wang X, Ding L, Wang P, Gao D, Zhang B, Rodriguez H, Fan J, Clevers H, Zhou H, Sun Y, Gao Q. Pharmaco-proteogenomic characterization of liver cancer organoids for precision oncology. Sci Transl Med 2023; 15:eadg3358. [PMID: 37494474 PMCID: PMC10949980 DOI: 10.1126/scitranslmed.adg3358] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 06/22/2023] [Indexed: 07/28/2023]
Abstract
Organoid models have the potential to recapitulate the biological and pharmacotypic features of parental tumors. Nevertheless, integrative pharmaco-proteogenomics analysis for drug response features and biomarker investigation for precision therapy of patients with liver cancer are still lacking. We established a patient-derived liver cancer organoid biobank (LICOB) that comprehensively represents the histological and molecular characteristics of various liver cancer types as determined by multiomics profiling, including genomic, epigenomic, transcriptomic, and proteomic analysis. Proteogenomic profiling of LICOB identified proliferative and metabolic organoid subtypes linked to patient prognosis. High-throughput drug screening revealed distinct response patterns of each subtype that were associated with specific multiomics signatures. Through integrative analyses of LICOB pharmaco-proteogenomics data, we identified the molecular features associated with drug responses and predicted potential drug combinations for personalized patient treatment. The synergistic inhibition effect of mTOR inhibitor temsirolimus and the multitargeted tyrosine kinase inhibitor lenvatinib was validated in organoids and patient-derived xenografts models. We also provide a user-friendly web portal to help serve the biomedical research community. Our study is a rich resource for investigation of liver cancer biology and pharmacological dependencies and may help enable functional precision medicine.
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Affiliation(s)
- Shuyi Ji
- Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai 201508, China
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Li Feng
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
| | - Zile Fu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Gaohua Wu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Yingcheng Wu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Youpei Lin
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Dayun Lu
- Analytical Research Center for Organic and Biological Molecules, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yuanli Song
- Analytical Research Center for Organic and Biological Molecules, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Peng Cui
- Burning Rock Biotech, Shanghai 201114, China
| | - Zijian Yang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Chen Sang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Guohe Song
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Shangli Cai
- Burning Rock Biotech, Shanghai 201114, China
| | | | - Hanqing Lin
- D1 Medical Technology, Shanghai 200235, China
| | - Shu Zhang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Xiaoying Wang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Shuangjian Qiu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Xiaoming Zhang
- Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China
| | - Guoqiang Hua
- Department of Radiation Oncology, and Cancer Institute, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Junqiang Li
- D1 Medical Technology, Shanghai 200235, China
| | - Jian Zhou
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
- Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Zhi Dai
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
| | - Xiangdong Wang
- Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital Institute for Clinical Science, Fudan University Shanghai Medical College, Shanghai, China
| | - Li Ding
- Department of Medicine, McDonnell Genome Institute, Siteman Cancer Center, Washington University, St. Louis, MO 63108, USA
| | - Pei Wang
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, NewYork, NY 10029, USA
| | - Daming Gao
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai 200031, China
| | - Bing Zhang
- Lester and Sue Smith Breast Center, Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Henry Rodriguez
- Office of Cancer Clinical Proteomics Research, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jia Fan
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
- Department of Radiation Oncology, and Cancer Institute, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Hans Clevers
- Oncode Institute, Hubrecht Institute and University Medical Center Utrecht, Uppsalalaan 8, 3584CT Utrecht, the Netherlands
- Current Address: Roche Pharma Research and Early Development (pRED), Basel, Switzerland
| | - Hu Zhou
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
- Analytical Research Center for Organic and Biological Molecules, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- Shanghai Institute of Materia Medica-University of Ottawa Joint Research Center in Systems and Personalized Pharmacology
| | - Yidi Sun
- Institute of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
| | - Qiang Gao
- Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai 201508, China
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai 200032, China
- Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Fudan University, Shanghai 200433, China
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Abstract
ABSTRACT Estrogen impacts neural development; meanwhile, it has a protective effect on the brain. Bisphenols, primarily bisphenol A (BPA), can exert estrogen-like or estrogen-interfering effects by binding with estrogen receptors. Extensive studies have suggested that neurobehavioral problems, such as anxiety and depression, can be caused by exposure to BPA during neural development. Increasing attention has been paid to the effects on learning and memory of BPA exposure at different developmental stages and in adulthood. Further research is required to elucidate whether BPA increases the risk of neurodegenerative diseases and the underlying mechanisms, as well as to assess whether BPA analogs, such as bisphenol S and bisphenol F, influence the nervous system.
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Affiliation(s)
- Chunxia Li
- Department of Obstetrics and Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing 100730, China
| | - Chen Sang
- School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
| | - Shuo Zhang
- Department of Obstetrics and Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing 100730, China
| | - Sai Zhang
- Department of Obstetrics and Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing 100730, China
| | - Hui Gao
- Department of Obstetrics and Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing 100730, China
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Xu D, Sang C, Yuan B, Li L. Investigation of the effects of the magnetic field on the anodic dissolution of alloy 690 in SO 4 2- + SCN - solution using digital holography. Heliyon 2023; 9:e13566. [PMID: 36879755 PMCID: PMC9984449 DOI: 10.1016/j.heliyon.2023.e13566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 02/01/2023] [Accepted: 02/02/2023] [Indexed: 02/11/2023] Open
Abstract
Digital holography has been employed for in situ observation of dynamic processes occurring at the electrode|electrolyte interface during the anodic dissolution of Alloy 690 in solutions containing SO4 2- + SCN- with or without magnetic field (MF). It was found that MF increased the anodic current of Alloy 690 in 0.5 M Na2SO4 + 5 mM KSCN solution but showed a decreased value when evaluated in 0.5 M H2SO4 + 5 mM KSCN solution. For each solution, as a result of the stirring effect due to Lorentz force, MF showed a decreased localized damage further preventing pitting corrosion. The content of nickel and iron at grain boundaries is higher than that on the grain body, in accordance with the Cr-depletion theory. MF increased the anodic dissolution of nickel and iron, which in turn increased the anodic dissolution at grain boundaries. In situ inline digital holography revealed that IGC begins at one grain boundary and progresses to adjacent grain boundaries with or without MF.
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Affiliation(s)
- Dongling Xu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, China
| | - Chen Sang
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, 221116, China
| | - Boyu Yuan
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, 221116, China
- Corresponding author.
| | - Liang Li
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, China
- Corresponding author.
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Lin J, Dai Y, Sang C, Song G, Xiang B, Zhang M, Dong L, Xia X, Ma J, Shen X, Ji S, Zhang S, Wang M, Fang H, Zhang X, Wang X, Zhang B, Zhou J, Fan J, Zhou H, Gao D, Gao Q. Multimodule characterization of immune subgroups in intrahepatic cholangiocarcinoma reveals distinct therapeutic vulnerabilities. J Immunother Cancer 2022; 10:jitc-2022-004892. [PMID: 35863823 PMCID: PMC9310257 DOI: 10.1136/jitc-2022-004892] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2022] [Indexed: 12/14/2022] Open
Abstract
Background Immune microenvironment is well recognized as a critical regulator across cancer types, despite its complex roles in different disease conditions. Intrahepatic cholangiocarcinoma (iCCA) is characterized by a tumor-reactive milieu, emphasizing a deep insight into its immunogenomic profile to provide prognostic and therapeutic implications. Methods We performed genomic, transcriptomic, and proteomic characterization of 255 paired iCCA and adjacent liver tissues. We validated our findings through H&E staining (n=177), multiplex immunostaining (n=188), single-cell RNA sequencing (scRNA-seq) (n=10), in vitro functional studies, and in vivo transposon-based mouse models. Results Integrated multimodule data identified three immune subgroups with distinct clinical, genetic, and molecular features, designated as IG1 (immune-suppressive, 25.1%), IG2 (immune-exclusion, 42.7%), and IG3 (immune-activated, 32.2%). IG1 was characterized by excessive infiltration of neutrophils and immature dendritic cells (DCs). The hallmark of IG2 was the relatively higher tumor-proliferative activity and tumor purity. IG3 exhibited an enrichment of adaptive immune cells, natural killer cells, and activated DCs. These immune subgroups were significantly associated with prognosis and validated in two independent cohorts. Tumors with KRAS mutations were enriched in IG1 and associated with myeloid inflammation-dominated immunosuppression. Although tumor mutation burden was relatively higher in IG2, loss of heterozygosity in human leucocyte antigen and defects in antigen presentation undermined the recognition of neoantigens, contributing to immune-exclusion behavior. Pathological analysis confirmed that tumor-infiltrating lymphocytes and tertiary lymphoid structures were both predominant in IG3. Hepatitis B virus (HBV)-related samples tended to be under-represented in IG1, and scRNA-seq analyses implied that HBV infection indeed alleviated myeloid inflammation and reinvigorated antitumor immunity. Conclusions Our study elucidates that the immunogenomic traits of iCCA are intrinsically heterogeneous among patients, posing great challenge and opportunity for the application of personalized immunotherapy.
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Affiliation(s)
- Jian Lin
- Jinshan Hospital Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China
| | - Yuting Dai
- Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chen Sang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China
| | - Guohe Song
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China
| | - Bin Xiang
- Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Shanghai, China
| | - Mao Zhang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China
| | - Liangqing Dong
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China
| | - Xiaoli Xia
- Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiaqiang Ma
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China
| | - Xia Shen
- Jinshan Hospital Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China
| | - Shuyi Ji
- Jinshan Hospital Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China
| | - Shu Zhang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China
| | - Mingjie Wang
- Department of Gastroenterology & Hepatology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Hai Fang
- Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaoming Zhang
- The Center for Microbes, Development and Health, Key Laboratory of Molecular Virology & Immunology, Institute Pasteur of Shanghai, University of Chinese Academy of Sciences, Shanghai, China
| | - Xiangdong Wang
- Jinshan Hospital Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China
| | - Bing Zhang
- Lester and Sue Smith Breast Center, Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Jian Zhou
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China.,Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Jia Fan
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China.,Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Hu Zhou
- Department of Analytical Chemistry and CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Daming Gao
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Qiang Gao
- Jinshan Hospital Center for Tumor Diagnosis & Therapy, Jinshan Hospital, Fudan University, Shanghai, China .,Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Fudan University, Shanghai, China.,Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
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7
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Wang H, Chen Y, Liu Y, Li Q, Luo J, Wang L, Chen Y, Sang C, Zhang W, Ge X, Yao Z, Miao L, Liu X. The lncRNA ZFAS1 regulates lipogenesis in colorectal cancer by binding polyadenylate-binding protein 2 to stabilize SREBP1 mRNA. Mol Ther Nucleic Acids 2022; 27:363-374. [PMID: 35036050 PMCID: PMC8728310 DOI: 10.1016/j.omtn.2021.12.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 12/08/2021] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) is the fourth leading cause of cancer-related mortality globally. Therefore, a better understanding of the early molecular events of this disease is needed. Long noncoding RNAs (lncRNAs) play a critical role in the regulation of tumorigenesis and cancer progression. In this study, we investigated the characteristics of ZFAS1 in CRC. We analyzed three independent microarray datasets of CRC tissues from GEO and found that ZFAS1 expression was remarkably upregulated in all three datasets. Moreover, we validated the overexpression of ZFAS1 in CRC tissues compared with normal tissues and found that ZFAS1 was positively correlated with tumor size and metastasis in CRC. Knockdown of ZFAS1 significantly suppressed the malignant phenotype and lipogenesis of CRC cells. Mechanistically, ZFAS1 binds polyadenylate-binding protein 2 (PABP2) to stabilize SREBP1 mRNA, thereby increasing the expression of SREBP1 and its target genes stearoyl-CoA desaturase (SCD1) and fatty acid synthase (FASN), thus promoting CRC lipid accumulation. These data demonstrated that ZFAS1 could act as an oncogene for CRC and that ZFAS1 reprograms lipid metabolism by binding with PABP2 to stabilize SREBP1 mRNA accumulation, implicating it as a novel and potent target for the treatment of CRC.
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Affiliation(s)
- Huishan Wang
- Department of Gastroenterology, Shanghai Songjiang District Central Hospital, Shanghai 210000, China
| | - Yuli Chen
- Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, China
| | - Yanwen Liu
- Department of Oncology, Zhongda Hospital, Medical School of Southeast University, Nanjing 210000, China
| | - Qiuhui Li
- Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, China
| | - Jing Luo
- Department of Cardiothoracic Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210011, China
| | - Li Wang
- Department of Oncology, The Third Medical School of Nanjing Medical University, Nanjing 210011, China
| | - Yuanyuan Chen
- Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, China
| | - Chen Sang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow of University, Changzhou G 213003, China
| | - Wen Zhang
- Department of Oncology, Zhongda Hospital, Medical School of Southeast University, Nanjing 210000, China
| | - Xianxiu Ge
- Department of Gastroenterology, Shanghai Songjiang District Central Hospital, Shanghai 210000, China
| | - Zhifeng Yao
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow of University, Changzhou G 213003, China
| | - Lin Miao
- Medical Center for Digestive Diseases, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, China
| | - Xianghua Liu
- Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, China
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8
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Zhao M, Yang F, Sang C, Yan C, Wang Z. BGL3 inhibits papillary thyroid carcinoma progression via regulating PTEN stability. J Endocrinol Invest 2021; 44:2165-2174. [PMID: 33543443 DOI: 10.1007/s40618-021-01519-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 01/23/2021] [Indexed: 02/06/2023]
Abstract
PURPOSE BGL3, a novel long non-coding RNA (lncRNA) that plays a crucial role in several human malignancies. However, the clinical significance and biological function of BGL3 in papillary thyroid carcinoma (PTC) have not been explored. Herein, we aimed to investigate the role of BGL3 in human PTC. METHODS A total of 85 pairs of PTC and normal tissues were collected for clinicopathological analysis. Expression of BGL3 was determined by quantitative real-time polymerase chain reaction (qRT-PCR). The effects of BGL3 on PTC cells ware determined by CCK-8, colony formation, EdU and wound healing assays. The molecular mechanism underlying BGL3 was tested by ChIP, Co-IP, RNA pull-down and luciferase reporter assays. In vivo experiments were conducted using xenografts in nude mice. RESULTS BGL3 was significantly decreased in PTC tissues compared to adjacent normal thyroid tissues, and it was transcriptionally repressed by oncogene Myc. Low BGL3 is positively related to larger tumor size, lymph node metastasis, later TNM stage and poor prognosis. Overexpression of BGL3 inhibited PTC cell proliferation and migration in vitro, and reduced tumor size and lung metastasis nodules in vivo. BGL3 was mainly located in the cytoplasm, in which interacted with PTEN and recruited OTUD3, enhancing the de-ubiquitination effect of OTUD3 on PTEN, resulting in increasing PTEN protein stability and inactivating carcinogenic PI3K/AKT signaling. CONCLUSIONS Our data underscore the critical tumor-inhibiting role of BGL3 in PTC via post-translational regulation of PTEN protein stability, which may serve as a novel therapeutic target and prognostic biomarker in human PTC.
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Affiliation(s)
- M Zhao
- Department of General Surgery, Yanqing District Hospital, Beijing and Yanqing Hospital, Peking University Third Hospital, Beijing, People's Republic of China
| | - F Yang
- Department of Orthopedics, Yanqing District Hospital, Beijing and Yanqing Hospital, Peking University Third Hospital, Beijing, People's Republic of China
| | - C Sang
- Department of General Surgery, Yanqing District Hospital, Beijing and Yanqing Hospital, Peking University Third Hospital, Beijing, People's Republic of China
| | - C Yan
- Department of General Surgery, Yanqing District Hospital, Beijing and Yanqing Hospital, Peking University Third Hospital, Beijing, People's Republic of China
| | - Z Wang
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People's Republic of China.
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9
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Chao C, Qian Y, Li X, Sang C, Wang B, Zhang XY. Surgical Survival Benefits With Different Metastatic Patterns for Stage IV Extrathoracic Metastatic Non-Small Cell Lung Cancer: A SEER-Based Study. Technol Cancer Res Treat 2021; 20:15330338211033064. [PMID: 34496678 PMCID: PMC8442485 DOI: 10.1177/15330338211033064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background: With the knowledge of oligometastases, primary surgery plays an increasingly
vital role in metastatic non-small cell lung cancer. We aimed to evaluate
the survival benefit of primary surgery based on metastatic patterns. Materials and Methods: The selected patients with stage IV extrathoracic metastatic (m1b) non-small
cell lung cancer between 2010 and 2015 were included in a retrospective
cohort study from the Surveillance, Epidemiology, and End Results (SEER)
database. Multiple imputation was used for the missing data. Patients were
divided into 2 groups depending on whether surgery was performed. After
covariate balancing propensity score (CBPS) weighting, multivariate Cox
regression models and Kaplan-Meier survival curve were built to identify the
survival benefit of different metastatic patterns. Results: Surgery can potentially increase the overall survival (OS) (adjusted HR:
0.68, P < 0.001) of non-small cell lung cancer. The
weighted 3-year OS in the surgical group was 16.9%, compared with 7.8% in
the nonsurgical group. For single organ metastasis, surgery could improve
the survival of metastatic non-small cell lung cancer. Meanwhile, no
significant survival improvements in surgical group were observed in
patients with multiple organ metastases. Conclusion: The surgical survival benefits for extrathoracic metastatic non-small cell
lung cancer could be divided by metastatic pattern.
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Affiliation(s)
- Ce Chao
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Yongxiang Qian
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Xihao Li
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Chen Sang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Bin Wang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Xiao-Ying Zhang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
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10
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Li J, Sang C, Fu R, Liu C, Suo L, Yan Y, Liu K, Huang RL. Long-Term Complications from Diced Cartilage in Rhinoplasty: A Meta-analysis. Facial Plast Surg Aesthet Med 2021; 24:221-227. [PMID: 34357798 DOI: 10.1089/fpsam.2021.0002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Objective: To analyze the incidences of long-term complications and revision surgery associated with diced cartilage grafts in dorsal augmentation rhinoplasty. Methods: The PubMed, MEDLINE, Embase, and Cochrane Central Register of Controlled Trials databases were searched for clinical studies on the use of diced cartilage for dorsal augmentation published. A meta-analysis was conducted to pool the estimated rates of infection, overcorrection, visible irregularity, absorption, and revision surgery. Result: A total of 14 studies involving 2380 patients were included in the systematic review. The combined rates were 11.5% for overall complications and 5.3% for revision surgery. The rates of the most frequently reported complications were 4.5% for infection, 5.3% for visible irregularity, 0.7% for overcorrection, and 0.5% for absorption. There was no significant difference in the rates of visible irregularity (p = 0.23) and revision surgery (p = 0.71) among the wrapped diced cartilage, glued diced cartilage, and free diced cartilage groups. Conclusion: This meta-analysis presents the first comprehensive and quantitative report of long-term complications associated with diced cartilage in dorsal augmentation rhinoplasty. Infection and visible irregularity were the most frequently reported complications. The rates of irregularity and revision surgery were not correlated with the diced cartilage packing methods.
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Affiliation(s)
- Jiaqi Li
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
| | - Chen Sang
- Department of Plastic and Burn Surgery, Zhucheng People's Hospital, Shanghai, China
| | - Rao Fu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chuanqi Liu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Linlang Suo
- Department of Surgery, Shanghai Eighth People's Hospital, Shanghai, China
| | - Yuxin Yan
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Kai Liu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ru-Lin Huang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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11
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Sang C, Song Y, Jin TW, Zhang S, Fu L, Zhao Y, Zou X, Wang Z, Gao H, Liu S. Bisphenol A induces ovarian cancer cell proliferation and metastasis through estrogen receptor-α pathways. Environ Sci Pollut Res Int 2021; 28:36060-36068. [PMID: 33683587 DOI: 10.1007/s11356-021-13267-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Bisphenol A (BPA) is a widely used raw material that can be detected both in the environment and in the human body. Due to its estrogen-like effects, wide concerns have been raised about the potential role of BPA in the initiation and development of hormone-dependent cancers. Ovarian cancer is the most common reproductive system cancer and has a high mortality rate in women. Despite recent investigations into BPA's carcinogenic effects, studies on its role in ovarian cancer development remain limited. In this study, we aimed to assess the effect of BPA at various environmentally relevant concentrations on proliferation and metastasis of ovarian cancer cells. We discovered that BPA can stimulate proliferation of OVCAR-3 ovarian cancer cells after exposure for up to 5 days. Strikingly, BPA enhanced ovarian cancer cell migration, invasion, and adhesion (to vascular endothelial cells) through upregulation of matrix metalloproteinase-2 (MMP-2), MMP-9, and intercellular cell adhesion molecule-1 (IMAC-1). The stimulatory effects of BPA on cancer cell proliferation and metastasis were reversed by treatment with an ERα inhibitor, but not by treatment with an ERβ inhibitor. Together, these results suggest that BPA induces proliferation and metastasis of ovarian cancer cells through ERα signaling pathways. This study provides new insights into the carcinogenic effects of BPA with regard to ovarian cancer.
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Affiliation(s)
- Chen Sang
- School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Yu Song
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, Heilongjiang Province, China
| | - Tong-Wang Jin
- School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Shuo Zhang
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China
| | - Linyan Fu
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China
| | - Yi Zhao
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China
| | - Xinxin Zou
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China
| | - Zhe Wang
- School of Public Health, Xinxiang Medical University, Xinxiang, 453003, Henan Province, China.
| | - Hui Gao
- Department of Obstetrics & Gynecology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100730, China.
| | - Sijin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing, 100085, China
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12
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Sang C, Kallmes DF, Kadirvel R, Durka MJ, Ding YH, Dai D, Watkins SC, Robertson AM. Adaptive Remodeling in the Elastase-induced Rabbit Aneurysms. Exp Mech 2021; 61:263-283. [PMID: 33814553 PMCID: PMC8011419 DOI: 10.1007/s11340-020-00671-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 09/29/2020] [Indexed: 05/11/2023]
Abstract
BACKGROUND Rupture of brain aneurysms is associated with high fatality and morbidity rates. Through remodeling of the collagen matrix, many aneurysms can remain unruptured for decades, despite an enlarging and evolving geometry. OBJECTIVE Our objective was to explore this adaptive remodeling for the first time in an elastase induced aneurysm model in rabbits. METHODS Saccular aneurysms were created in 22 New Zealand white rabbits and remodeling was assessed in tissue harvested 2, 4, 8 and 12 weeks after creation. RESULTS The intramural principal stress ratio doubled after aneurysm creation due to increased longitudinal loads, triggering a remodeling response. A distinct wall layer with multi-directional collagen fibers developed between the media and adventitia as early as 2 weeks, and in all cases by 4 weeks with an average thickness of 50.6 ± 14.3 μm. Collagen fibers in this layer were multi-directional (AI = 0.56 ± 0.15) with low tortuosity (1.08 ± 0.02) compared with adjacent circumferentially aligned medial fibers (AI = 0.78 ± 0.12) and highly tortuous adventitial fibers (1.22 ± 0.03). A second phase of remodeling replaced circumferentially aligned fibers in the inner media with longitudinal fibers. A structurally motivated constitutive model with both remodeling modes was introduced along with methodology for determining material parameters from mechanical testing and multiphoton imaging. CONCLUSIONS A new mechanism was identified by which aneurysm walls can rapidly adapt to changes in load, ensuring the structural integrity of the aneurysm until a slower process of medial reorganization occurs. The rabbit model can be used to evaluate therapies to increase aneurysm wall stability.
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Affiliation(s)
- C Sang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, PA 15261
| | - D F Kallmes
- Department of Radiology, Mayo Clinic, Rochester, MN
| | - R Kadirvel
- Department of Radiology, Mayo Clinic, Rochester, MN
| | - M J Durka
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, PA 15261
| | - Y-H Ding
- Department of Radiology, Mayo Clinic, Rochester, MN
| | - D Dai
- Department of Radiology, Mayo Clinic, Rochester, MN
| | - S C Watkins
- Center for Biological Imaging, University of Pittsburgh, Pittsburgh, PA
| | - A M Robertson
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, PA 15261
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13
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Fortunato RN, Robertson AM, Sang C, Duan X, Maiti S. Effect of macro-calcification on the failure mechanics of intracranial aneurysmal wall tissue. Exp Mech 2021; 61:5-18. [PMID: 33776069 PMCID: PMC7992055 DOI: 10.1007/s11340-020-00657-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 07/16/2020] [Accepted: 08/05/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Calcification was recently found to be present in the majority of cerebral aneurysms, though how calcification and the presence or absence of co-localized lipid pools affect failure properties is still unknown. OBJECTIVE The primary objective is to quantify the biomechanical effect of a macro-calcification with surrounding Near-Calcification Region (NCR) of varying mechanical properties on tissue failure behavior. METHODS We utilized a structurally informed finite element model to simulate pre-failure and failure behavior of a human cerebral tissue specimen modeled as a composite containing a macro-calcification and surrounding NCR, embedded in a fiber matrix composite. Data from multiple imaging modalities was combined to quantify the collagen organization and calcification geometry. An idealized parametric model utilizing the calibrated model was used to explore the impact of NCR properties on tissue failure. RESULTS Compared to tissue without calcification, peak stress was reduced by 82% and 49% for low modulus (representing lipid pool) and high modulus (simulating increase in calcification size) of the NCR, respectively. Failure process strongly depended on NCR properties with lipid pools blunting the onset of complete failure. When the NCR was calcified, the sample was able to sustain larger overall stress, however the failure process was abrupt with nearly simultaneous failure of the loaded fibers. CONCLUSIONS Failure of calcified vascular tissue is strongly influenced by the ultrastructure in the vicinity of the calcification. Computational modeling of failure in fibrous soft tissues can be used to understand how pathological changes impact the tissue failure process, with potentially important clinical implications.
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Affiliation(s)
- R. N. Fortunato
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh Pittsburgh, USA
| | - A. M. Robertson
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh Pittsburgh, USA
- Department of Bioengineering, University of Pittsburgh Pittsburgh, USA
| | - C. Sang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh Pittsburgh, USA
| | - X. Duan
- Intelligent Automation Group, PNC Bank, University of Pittsburgh Pittsburgh, USA
| | - S. Maiti
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh Pittsburgh, USA
- Department of Bioengineering, University of Pittsburgh Pittsburgh, USA
- Department of Chemical and Petroleum Engineering, University of Pittsburgh Pittsburgh, USA
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14
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Wang J, Xue T, Ye H, Sang C, Wu S, Li S. Study of the common activating mechanism of apoptosis and epithelial-to-mesenchymal transition in alveolar type II epithelial cells. Respir Physiol Neurobiol 2020; 284:103584. [PMID: 33197603 DOI: 10.1016/j.resp.2020.103584] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/09/2020] [Accepted: 11/11/2020] [Indexed: 12/17/2022]
Abstract
Infection and severe trauma can result in acute lung injury/acute respiratory distress syndrome (ALI/ARDS) and eventually pulmonary fibrosis. Epithelial-to-mesenchymal transition (EMT) is related to pulmonary fibrosis. Our study found that pyocyanin (PCN) could promote apoptosis and EMT in alveolar type II epithelial A549 cells. We hypothesized that there might be a common mechanism related to both apoptosis and EMT in A549 cells. The aim of this study was to determine whether reactive oxygen species (ROS) induced by PCN is the common stimulus upstream of apoptosis and EMT as well as the relevant signalling pathways. A549 cells were challenged with PCN; ROS was then detected by immunofluorescence, and apoptosis was measured by flow cytometry. Caspases, EMT markers and the TGF-β/Smad pathway were assessed by Western blot, qPCR or ELISA. The results showed that PCN promoted ROS production, and the apoptosis rate was clearly increased. E-cadherin downregulation, vimentin and α-SMA upregulation in A549 cells, cleaved caspase-9 and caspase-3, TGF-β1 and activated Smad2/3 were also detected. Interestingly, the protein expression of cleaved caspase-3 and vimentin was highly positively correlated. Inhibition of ROS could partially reverse PCN-induced EMT and apoptosis in A549 cells, and EMT could also be reversed by TGF-β1 inhibitors. In conclusion, ROS may be a common activating mechanism of apoptosis and EMT in alveolar epithelial cells, during which the degree of apoptosis is positively related to EMT. ROS may induce alveolar epithelial cell apoptosis through the mitochondrial pathway or endoplasmic reticulum pathway. ROS activates TGF-β1, followed by SMADs, eventually inducing EMT.
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Affiliation(s)
- Jiali Wang
- Department of Respiratory and Critical Care Medicine, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing, 101149, China
| | - Tianjiao Xue
- Department of Infectious Disease, Fuxing Hospital, Capital Medical University, Beijing, 10038, China
| | - Huan Ye
- Department of Respiratory and Critical Care Medicine, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing, 101149, China.
| | - Chen Sang
- Department of Biological Engineering, Beihang University, Beijing, 100191, China
| | - Shuai Wu
- Department of Infectious Disease, Fuxing Hospital, Capital Medical University, Beijing, 10038, China
| | - Shanshan Li
- Department of Respiratory and Critical Care Medicine, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing, 101149, China
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15
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Sang C, Chao C, Wang M, Zhang Y, Luo G, Zhang X. Identification and validation of hub microRNAs dysregulated in esophageal squamous cell carcinoma. Aging (Albany NY) 2020; 12:9807-9824. [PMID: 32412911 PMCID: PMC7288914 DOI: 10.18632/aging.103245] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 04/17/2020] [Indexed: 12/21/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the deadliest cancers worldwide, and its morbidity is exacerbated by the lack of early symptoms. Bioinformatics analyses enable discovery of differentially expressed genes and non-protein-coding RNAs of potential prognostic and/or therapeutic relevance in ESCC and other cancers. Using bioinformatics tools, we searched for dysregulated miRNAs in two ESCC microarray datasets from the Gene Expression Omnibus (GEO) database. After identification of three upregulated and five downregulated miRNAs shared between databases, protein-protein interaction (PPI) network analysis was used to identify the top 10 hub-gene targets. Thereafter, a miRNA-gene interaction network predicted that most hub genes are regulated by miR-196a-5p and miR-1-3p, which are respectively upregulated and downregulated in ESCC. Functional enrichment analyses in the GO and KEGG databases indicated the potential involvement of these miRNAs in tumorigenesis-related processes and pathways, while both differential expression and correlation with T stage were demonstrated for each miRNA in a cohort of ESCC patients. Overexpression showed that miR-196a-5p increased, whereas miR-1-3p attenuated, proliferation and invasion in human ESCC cell lines grown in vitro. These findings suggest miR-196a-5p and miR-1-3p jointly contribute to ESCC tumorigenesis and are potential targets for diagnosis and treatment.
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Affiliation(s)
- Chen Sang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Ce Chao
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Min Wang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Youpu Zhang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Guanghua Luo
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Xiaoying Zhang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
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16
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Yu M, Pan L, Sang C, Mu Q, Zheng L, Luo G, Xu N. Apolipoprotein M could inhibit growth and metastasis of SMMC7721 cells via vitamin D receptor signaling. Cancer Manag Res 2019; 11:3691-3701. [PMID: 31190977 PMCID: PMC6525829 DOI: 10.2147/cmar.s202799] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/05/2019] [Indexed: 12/12/2022] Open
Abstract
Objective: Hepatocellular carcinoma (HCC) is one of the most common malignant tumors with high mortality-to-incidence ratios. Apolipoprotein M (ApoM), a member of the apolipoprotein family, is mainly synthesized in the liver, whereas its role in HCC has not been elucidated. Here, we examined the effect of ApoM on the biological behavior of HCC cells and the possible mechanisms. Methods: We used CRISPR/Cas9 technology to knock out ApoM in SMMC7721 cells. Differentially expressed genes before and after ApoM knockout (KO) were analyzed by GeneChip microarrays and confirmed by qRT-PCR. Cell assays of proliferation, apoptosis, migration and invasion were performed in SMMC7721 cells, and the expression of epithelial-mesenchymal transition (EMT) markers was performed by western blot. And we performed functional recovery experiments by overexpressing vitamin D receptor (VDR) in SMMC7721. Results: The ApoM-KO SMMC7721 cell line was successfully constructed using the CRISPR/Cas9 technology. Our results showed that silencing ApoM suppressed apoptosis and promoted proliferation, migration, invasion and EMT of SMMC7721 cells. The microarray data revealed that a total of 1,868 differentially expressed genes were identified, including VDR. The qRT-PCR and western blot verification results demonstrated that knocking out ApoM could significantly reduce the expression of VDR. The functional recovery experiments indicated that VDR overexpression could offset the inhibition of cell apoptosis and the promotion of cell proliferation, migration, invasion and EMT caused by knocking out ApoM in SMMC7721 cells. Conclusion: ApoM could function as a tumor suppressor to inhibit the growth and metastasis of SMMC7721 cells via VDR signaling in HCC.
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Affiliation(s)
- Miaomei Yu
- Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, People's Republic of China
| | - Lili Pan
- Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, People's Republic of China
| | - Chen Sang
- Department of Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou 213003, People's Republic of China
| | - Qinfeng Mu
- Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, People's Republic of China
| | - Lu Zheng
- Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, People's Republic of China
| | - Guanghua Luo
- Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, People's Republic of China
| | - Ning Xu
- Section of Clinical Chemistry and Pharmacology, Institute of Laboratory Medicine, Lunds University, Lund S‑22185, Sweden
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Hao B, Peng X, Bi B, Yu M, Sang C, Chen Z. Preoperative serum high-density lipoprotein cholesterol as a predictor of poor survival in patients with clear cell renal cell cancer. Int J Biol Markers 2019; 34:168-175. [PMID: 30912469 DOI: 10.1177/1724600819831404] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Purpose: Numerous studies have suggested that dyslipidemia is closely related to various cancers and the high-density lipoprotein cholesterol (HDL-C) levels are associated with the outcome of cancer patients. However, the predictive value of HDL-C in patients with renal cell carcinoma remains unclear. Our study aims to explore the relationship between the levels of serum HDL-C and the prognosis of renal cell carcinoma. Methods: A total of 308 patients diagnosed with clear cell renal cell carcinoma (CCRCC) who received surgical treatment were retrospectively enrolled in our study. The necessary clinical data of each enrolled patient were collected and the Kaplan–Meier method and the Cox proportional hazards regression model were used to calculate the overall survival and cancer-specific survival. Results: Kaplan–Meier and univariate analysis showed that a lower preoperative serum HDL-C level was a risk factor of CCRCC patients. Multivariate analyses demonstrated that a higher serum HDL-C level was closely associated with better overall survival (hazard ratio = 0.32; 95% confidence interval (0.13, 0.78); P=0.013) and cancer-specific survival (hazard ratio =0.42; 95% confidence interval (0.15, 0.99); P=0.048). Conclusion: Our findings suggest that an increased serum level of HDL-C might predict better overall survival and cancer-specific survival in patients with CCRCC.
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Affiliation(s)
- Bo Hao
- Department of Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Xufeng Peng
- Department of Urology, Children’s Hospital of Shanghai, Shanghai Jiao Tong University, Shanghai, China
| | - Baochen Bi
- Department of Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Miaomei Yu
- Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Chen Sang
- Department of Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Zhen Chen
- Department of Urology, the Third Affiliated Hospital of Soochow University, Changzhou, China
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Hao B, Bi B, Sang C, Yu M, Di D, Luo G, Zhang X. Systematic Review and Meta-Analysis of the Prognostic Value of Serum High-Density Lipoprotein Cholesterol Levels for Solid Tumors. Nutr Cancer 2019; 71:547-556. [PMID: 30871387 DOI: 10.1080/01635581.2019.1577983] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bo Hao
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, People’s Republic of China
| | - Baochen Bi
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, People’s Republic of China
| | - Chen Sang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, People’s Republic of China
| | - Miaomei Yu
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou, People’s Republic of China
| | - Dongmei Di
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, People’s Republic of China
| | - Guanghua Luo
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou, People’s Republic of China
| | - Xiaoying Zhang
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, People’s Republic of China
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Hao B, Yu M, Sang C, Bi B, Chen J. Dyslipidemia and non-small cell lung cancer risk in Chinese population: a case-control study. Lipids Health Dis 2018; 17:278. [PMID: 30522496 PMCID: PMC6284307 DOI: 10.1186/s12944-018-0925-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/22/2018] [Indexed: 12/16/2022] Open
Abstract
Background Numerous studies reported that dyslipidemia was associated with cancer risk. However, few studies investigated the associations between dyslipidemia and non-small cell lung cancer (NSCLC). Methods Four hundred twenty-four histologically confirmed NSCLC cases and 414 controls, matched for age and sex, were enrolled to examine the relationship between dyslipidemia and NSCLC. Demographic and clinical data were obtained from patients’ medical records and telephone interviews. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated using unconditional logistic regression. Results Abnormal triglyceride (TG) and high-density lipoprotein cholesterol (HDL-C) levels showed statistically significant coexistence with NSCLC compared with controls. Higher levels of TG were associated with a higher risk of NSCLC (OR = 1.541, 95% CI, (1.072–2.215)). The odds ratios (ORs) for NSCLC for normal and high levels of HDL-C versus those with a low level of HDL-C were 0.337(95% CI, (0.242–0.468)) and 0.288(95% CI, (0.185–0.448)), respectively. After adjustment for age, sex, smoking status, hypertension, body mass index, diabetes and lipid profiles, the adjusted OR for normal and high levels of HDL-C were 0.320(95% CI, (0.218–0.470)) and 0.233(95% CI, (0.134–0.407)), respectively. However, after adjustment, high levels of TG increased the risk of NSCLC but not significantly (OR = 1.052, 95% CI (0.671–1.649)). Conclusions This study provided evidence that dyslipidemia increased the risk of NSCLC in Chinese population.
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Affiliation(s)
- Bo Hao
- Department of Cardiothoracic Surgery, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, 441021, China
| | - Miaomei Yu
- Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou, 213003, China
| | - Chen Sang
- Department of Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou, 213003, China
| | - Baochen Bi
- Department of Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou, 213003, China
| | - Jiajun Chen
- Department of Cardiothoracic Surgery, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, 441021, China.
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Ding L, Chen J, Long R, Gibb M, Wang L, Sang C, Mi J, Zhou J, Liu P, Shang Z, Guo X, Qiu Q, Marquardt S. Blood hormonal and metabolite levels in grazing yak steers undergoing compensatory growth. Anim Feed Sci Technol 2015. [DOI: 10.1016/j.anifeedsci.2015.07.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Raini SK, Nyangao J, Kombich J, Sang C, Gikonyo J, Ongus JR, Odari EO. Human rotavirus group a serotypes causing gastroenteritis in children less than 5 years and HIV-infected adults in Viwandani slum, Nairobi. Ethiop J Health Sci 2015; 25:39-46. [PMID: 25733783 PMCID: PMC4337073 DOI: 10.4314/ejhs.v25i1.6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Rotavirus remains a leading cause of acute gastroenteritis in children worldwide with an estimated 2000 deaths each day in developing countries. Due to HIV/AIDS scourge in Kenya, it is possible that rotavirus-related gastroenteritis has been aggravated in adults. The Global Alliance for Immunizations has ranked rotavirus infection a priority for vaccine, and, to ensure its success, there is a need to document the local strain(s) circulating in different regions. METHODS A cross-sectional study was conducted to document human rotavirus group A serotypes in children below 5 years and HIV-infected adults in Viwandani slum in Nairobi, Kenya. A total of 260 (128 from children and 132 from HIV infected adults) fecal specimen samples were analyzed from August 2012 to July 2013. Screening for rotavirus was done by antigen based enzyme immune-sorbent assay (ELISA), Polyacrylamide gel electrophoresis (PAGE) was used to detect rotavirus electropherotypes and finally genotyping was done by RT-PCR using genotype-specific primer sets targeting VP4 and VP7 genes. RESULTS Rotavirus was detected in 23% and 8% of children and adult, respectively. Prevalence was high in children of < 2 years and adults of > 48 years. Long electropherotypes accounted for 80% and 60% while short electropherotypes accounted for 20% and 40% in children and adult, respectively. The common globally distributed strains, G1 and G3, accounted for 60% detections while the unusual G9 strain accounted for 80% infection in adults. G1P[8] was the common genotypic combination in children, accounting for 40% infection, whereas G9 [P8] accounted for 60% of the infections in adults. CONCLUSION This study shows the existence of strain diversity between rotavirus circulating in children and adults within this study group. It further shows that as currently constituted, the 2 vaccines recommended for rotavirus would cover the circulating strain in Viwandani slum. Finally, there is a need for continuous rotavirus strain surveillance in children and a further focus on HIV infected adults.
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Affiliation(s)
- S K Raini
- College of Health Sciences, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - J Nyangao
- Centre for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - J Kombich
- Centre for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - C Sang
- College of Health Sciences, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - J Gikonyo
- Centre for Virus Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - J R Ongus
- College of Health Sciences, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - E O Odari
- College of Health Sciences, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya ; Max von Pettenkofer-Institute, Munich, Germany
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Sang C, Lin Y, Jiang K, Zhang F, Ma C, Ma L, Song W. Molecular cloning and expression analysis of MyD88 in spiny head croaker, Collichthys lucidus. Genet Mol Res 2015; 14:4666-76. [DOI: 10.4238/2015.may.4.26] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sang C, Lin Y, Jiang K, Zhang F, Song W. Molecular cloning and mRNA expression of a hepcidin gene from the spinyhead croaker, Collichthys lucidus. Genet Mol Res 2015; 14:16050-9. [DOI: 10.4238/2015.december.7.18] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Thiel CS, Paulsen K, Bradacs G, Lust K, Tauber S, Dumrese C, Hilliger A, Schoppmann K, Biskup J, Gölz N, Sang C, Ziegler U, Grote KH, Zipp F, Zhuang F, Engelmann F, Hemmersbach R, Cogoli A, Ullrich O. Rapid alterations of cell cycle control proteins in human T lymphocytes in microgravity. Cell Commun Signal 2012; 10:1. [PMID: 22273506 PMCID: PMC3275513 DOI: 10.1186/1478-811x-10-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Accepted: 01/24/2012] [Indexed: 02/02/2023] Open
Abstract
In our study we aimed to identify rapidly reacting gravity-responsive mechanisms in mammalian cells in order to understand if and how altered gravity is translated into a cellular response. In a combination of experiments using "functional weightlessness" provided by 2D-clinostats and real microgravity provided by several parabolic flight campaigns and compared to in-flight-1g-controls, we identified rapid gravity-responsive reactions inside the cell cycle regulatory machinery of human T lymphocytes. In response to 2D clinorotation, we detected an enhanced expression of p21 Waf1/Cip1 protein within minutes, less cdc25C protein expression and enhanced Ser147-phosphorylation of cyclinB1 after CD3/CD28 stimulation. Additionally, during 2D clinorotation, Tyr-15-phosphorylation occurred later and was shorter than in the 1 g controls. In CD3/CD28-stimulated primary human T cells, mRNA expression of the cell cycle arrest protein p21 increased 4.1-fold after 20s real microgravity in primary CD4+ T cells and 2.9-fold in Jurkat T cells, compared to 1 g in-flight controls after CD3/CD28 stimulation. The histone acetyltransferase (HAT) inhibitor curcumin was able to abrogate microgravity-induced p21 mRNA expression, whereas expression was enhanced by a histone deacetylase (HDAC) inhibitor. Therefore, we suppose that cell cycle progression in human T lymphocytes requires Earth gravity and that the disturbed expression of cell cycle regulatory proteins could contribute to the breakdown of the human immune system in space.
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Affiliation(s)
- Cora S Thiel
- Institute of Anatomy, Faculty of Medicine, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
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Zhao L, Sang C, Yang C, Zhuang F. Effects of stress fiber contractility on uniaxial stretch guiding mitosis orientation and stress fiber alignment. J Biomech 2011; 44:2388-94. [PMID: 21767844 DOI: 10.1016/j.jbiomech.2011.06.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Revised: 06/29/2011] [Accepted: 06/29/2011] [Indexed: 11/28/2022]
Abstract
It has been documented that mitosis orientation (MO) is guided by stress fibers (SFs), which are perpendicular to exogenous cyclic uniaxial stretch. However, the effect of mechanical forces on MO and the mechanism of stretch-induced SFs reorientation are not well elucidated to date. In the present study, we used murine 3T3 fibroblasts as a model, to investigate the effects of uniaxial stretch on SFO and MO utilizing custom-made stretch device. We found that cyclic uniaxial stretch induced both SFs and mitosis directions orienting perpendicularly to the stretch direction. The F-actin and myosin II blockages, which resulted in disoriented SFs and mitosis directions under uniaxial stretch, suggested a high correlation between SFO and MO. Y27632 (10 μM), ML7 (50 μM, or 75 μM), and blebbistatin (50 μM, or 75 μM) treatments resulted in SFO parallel to the principle stretch direction. Upon stimulating and inhibiting the phosphorylation of myosin light chain (p-MLC), we observed a monotonic proportion of SFO to the level of p-MLC. These results suggested that the level of cell contraction is crucial to the response of SFs, either perpendicular or parallel, to the external stretch. Showing the possible role of cell contractility in tuning SFO under external stretch, our experimental data are valuable to understand the predominant factor controlling SFO response to exogenous uniaxial stretch, and thus helpful for improving mechanical models.
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Affiliation(s)
- Lei Zhao
- School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
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Zhou J, Zhao L, Qin L, Wang J, Jia Y, Yao H, Sang C, Hu Q, Shi S, Nan X, Yue W, Zhuang F, Yang C, Wang Y, Pei X. Epimorphin regulates bile duct formation via effects on mitosis orientation in rat liver epithelial stem-like cells. PLoS One 2010; 5:e9732. [PMID: 20305811 PMCID: PMC2840022 DOI: 10.1371/journal.pone.0009732] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Accepted: 02/23/2010] [Indexed: 01/11/2023] Open
Abstract
Understanding how hepatic precursor cells can generate differentiated bile ducts is crucial for studies on epithelial morphogenesis and for development of cell therapies for hepatobiliary diseases. Epimorphin (EPM) is a key morphogen for duct morphogenesis in various epithelial organs. The role of EPM in bile duct formation (DF) from hepatic precursor cells, however, is not known. To address this issue, we used WB-F344 rat epithelial stem-like cells as model for bile duct formation. A micropattern and a uniaxial static stretch device was used to investigate the effects of EPM and stress fiber bundles on the mitosis orientation (MO) of WB cells. Immunohistochemistry of liver tissue sections demonstrated high EPM expression around bile ducts in vivo. In vitro, recombinant EPM selectively induced DF through upregulation of CK19 expression and suppression of HNF3alpha and HNF6, with no effects on other hepatocytic genes investigated. Our data provide evidence that EPM guides MO of WB-F344 cells via effects on stress fiber bundles and focal adhesion assembly, as supported by blockade EPM, beta1 integrin, and F-actin assembly. These blockers can also inhibit EPM-induced DF. These results demonstrate a new biophysical action of EPM in bile duct formation, during which determination of MO plays a crucial role.
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Affiliation(s)
- Junnian Zhou
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
| | - Lei Zhao
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Lipeng Qin
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
| | - Jing Wang
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Yali Jia
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
| | - Hailei Yao
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
| | - Chen Sang
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Qinghua Hu
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Shuangshuang Shi
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
| | - Xue Nan
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
| | - Wen Yue
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
| | - Fengyuan Zhuang
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Chun Yang
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Yunfang Wang
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
| | - Xuetao Pei
- Stem Cell and Regenerative Medicine Lab, Beijing Institute of Transfusion Medicine, Beijing, China
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Liu YY, Bao YJ, Liu WH, Yao DK, Qin KR, Jiang LH, Sang C. [An analysis of pharyngeal respiratory pressure before and after onset of obstruction in respiratory obstructive sleep apnea hypopnea syndrome]. Zhonghua Nei Ke Za Zhi 2006; 45:914-7. [PMID: 17313879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
OBJECTIVE To study the characteristics of pharyngeal respiratory pressure before and after onset of airflow obstruction events in obstructive sleep apnea hypopnea syndrome (OSAHS). METHODS The respiratory pressure in nasopharynx, oropharynx, and hypopharynx in 8 patients with OSAHS and 9 normal persons were evaluated through catheter manometer. Base on mean respiratory pressure and the ratio of negative respiratory pressure persistent time, the characteristics of pharyngeal respiratory pressure before and after the event onset were analyzed. RESULTS During sleep, the pharyngeal respiratory pressure in normal persons had similar and periodical wave shape. The ratio of negative respiratory pressure persistent time was less than 0.5. In patients with OSAHS, when the obstruction of airflow happened, the pharyngeal respiratory pressure fluctuated violently, the wave shape became irregular, and the negative expiratory pressure was evident. The mean respiratory pressure was 1 to 2 order of magnitude larger than in normal persons, even reaching -990 Pa. The ratio of persistent negative pressure time was larger than normal. During the intermittent period, the wave shape of pharyngeal respiratory pressure was regular and periodical, the pressure wave shape was different from onset of obstruction. However, in the intermittent period, the mean respiratory pressure, the ratio of negative respiratory pressure persistent time, and other characteristics were still statistically different from normal persons (P < 0.05). CONCLUSIONS During the intermittent period, the pharyngeal respiratory pressure in patients with OSAHS during sleep is basically different from the pharyngeal respiratory pressure in normal person. The characteristics of pharyngeal respiratory pressure in intermittent period indicates that both structural and functional abnormalities in pharyngeal cavity in patients with OSAHS, which affect the respiratory airflow during sleep are inherent. The effects are more prominent during onset period, suggesting that the characteristics of the pharyngeal pressure of breathing during the onset period will be more important to the mechanism of airflow obstruction.
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Affiliation(s)
- Yong-yi Liu
- Department of Otorhinolaryngology, The 359th Hospital of PLA, Zhenjiang, Jiangsu Province 212001, China.
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Katsuno M, Sang C, Adachi H, Minamiyama M, Waza M, Tanaka F, Doyu M, Sobue G. Pharmacological induction of heat-shock proteins alleviates polyglutamine-mediated motor neuron disease. Proc Natl Acad Sci U S A 2005; 102:16801-6. [PMID: 16260738 PMCID: PMC1275598 DOI: 10.1073/pnas.0506249102] [Citation(s) in RCA: 177] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Spinal and bulbar muscular atrophy (SBMA) is an adult-onset motor neuron disease caused by the expansion of a trinucleotide CAG repeat encoding the polyglutamine tract in the first exon of the androgen receptor gene (AR). The pathogenic, polyglutamine-expanded AR protein accumulates in the cell nucleus in a ligand-dependent manner and inhibits transcription by interfering with transcriptional factors and coactivators. Heat-shock proteins (HSPs) are stress-induced chaperones that facilitate the refolding and, thus, the degradation of abnormal proteins. Geranylgeranylacetone (GGA), a nontoxic antiulcer drug, has been shown to potently induce HSP expression in various tissues, including the central nervous system. In a cell model of SBMA, GGA increased the levels of Hsp70, Hsp90, and Hsp105 and inhibited cell death and the accumulation of pathogenic AR. Oral administration of GGA also up-regulated the expression of HSPs in the central nervous system of SBMA-transgenic mice and suppressed nuclear accumulation of the pathogenic AR protein, resulting in amelioration of polyglutamine-dependent neuromuscular phenotypes. These observations suggest that, although a high dose appears to be needed for clinical effects, oral GGA administration is a safe and promising therapeutic candidate for polyglutamine-mediated neurodegenerative diseases, including SBMA.
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Affiliation(s)
- Masahisa Katsuno
- Department of Neurology, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550, Japan
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Waza M, Adachi H, Katsuno M, Minamiyama M, Sang C, Tanaka F, Inukai A, Doyu M, Sobue G. 17-AAG, an Hsp90 inhibitor, ameliorates polyglutamine-mediated motor neuron degeneration. Nat Med 2005; 11:1088-95. [PMID: 16155577 DOI: 10.1038/nm1298] [Citation(s) in RCA: 302] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2005] [Accepted: 08/10/2005] [Indexed: 12/29/2022]
Abstract
Heat-shock protein 90 (Hsp90) functions as part of a multichaperone complex that folds, activates and assembles its client proteins. Androgen receptor (AR), a pathogenic gene product in spinal and bulbar muscular atrophy (SBMA), is one of the Hsp90 client proteins. We examined the therapeutic effects of 17-allylamino-17-demethoxygeldanamycin (17-AAG), a potent Hsp90 inhibitor, and its ability to degrade polyglutamine-expanded mutant AR. Administration of 17-AAG markedly ameliorated motor impairments in the SBMA transgenic mouse model without detectable toxicity, by reducing amounts of monomeric and aggregated mutant AR. The mutant AR showed a higher affinity for Hsp90-p23 and preferentially formed an Hsp90 chaperone complex as compared to wild-type AR; mutant AR was preferentially degraded in the presence of 17-AAG in both cells and transgenic mice as compared to wild-type AR. 17-AAG also mildly induced Hsp70 and Hsp40. 17-AAG would thus provide a new therapeutic approach to SBMA and probably to other related neurodegenerative diseases.
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Affiliation(s)
- Masahiro Waza
- Department of Neurology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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Adachi H, Katsuno M, Minamiyama M, Waza M, Sang C, Nakagomi Y, Kobayashi Y, Tanaka F, Doyu M, Inukai A, Yoshida M, Hashizume Y, Sobue G. Widespread nuclear and cytoplasmic accumulation of mutant androgen receptor in SBMA patients. ACTA ACUST UNITED AC 2005; 128:659-70. [PMID: 15659427 DOI: 10.1093/brain/awh381] [Citation(s) in RCA: 158] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Spinal and bulbar muscular atrophy (SBMA) is an inherited adult onset motor neuron disease caused by the expansion of a polyglutamine (polyQ) tract within the androgen receptor (AR), affecting only males. The characteristic pathological finding is nuclear inclusions (NIs) consisting of mutant AR with an expanded polyQ in residual motor neurons, and in certain visceral organs. We immunohistochemically examined 11 SBMA patients at autopsy with 1C2, an antibody that specifically recognizes expanded polyQ. Our study demonstrated that diffuse nuclear accumulation of mutant AR was far more frequent and extensive than NIs being distributed in a wide array of CNS nuclei, and in more visceral organs than thus far believed. Mutant AR accumulation was also present in the cytoplasm, particularly in the Golgi apparatus; nuclear or cytoplasmic predominance of accumulation was tissue specific. Furthermore, the extent of diffuse nuclear accumulation of mutant AR in motor and sensory neurons of the spinal cord was closely related to CAG repeat length. Thus, diffuse nuclear accumulation of mutant AR apparently is a cardinal pathogenetic process underlying neurological manifestations, as in SBMA transgenic mice, while cytoplasmic accumulation may also contribute to SBMA pathophysiology.
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Affiliation(s)
- Hiroaki Adachi
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Minamiyama M, Katsuno M, Adachi H, Waza M, Sang C, Kobayashi Y, Tanaka F, Doyu M, Inukai A, Sobue G. Sodium butyrate ameliorates phenotypic expression in a transgenic mouse model of spinal and bulbar muscular atrophy. Hum Mol Genet 2004; 13:1183-92. [PMID: 15102712 DOI: 10.1093/hmg/ddh131] [Citation(s) in RCA: 188] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Spinal and bulbar muscular atrophy (SBMA) is an inherited motor neuron disease caused by the expansion of a polyglutamine (polyQ) tract within the androgen receptor. Unifying mechanisms have been implicated in the pathogenesis of polyQ-dependent neurodegenerative diseases including SBMA, Huntington disease and spinocerebellar ataxias. It has been suggested that mutant protein containing polyQ inhibits histone acetyltransferase activity, resulting in transcriptional dysfunction and subsequent neuronal dysfunction. Histone deacetylase (HDAC) inhibitors alleviate neurological phenotypes in fly and mouse models of polyQ disease, although the therapeutic effect is limited by the toxicity of these compounds. We studied the therapeutic effects of sodium butyrate (SB), an HDAC inhibitor, in a transgenic mouse model of SBMA. Oral administration of SB ameliorated neurological phenotypes as well as increased acetylation of nuclear histone in neural tissues. These therapeutic effects, however, were seen only within a narrow range of SB dosage. Our results indicate that SB is a possible therapeutic agent for SBMA and other polyQ diseases, although an appropriate dose should be determined for clinical application.
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Affiliation(s)
- Makoto Minamiyama
- Department of Neurologu, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Katsuno M, Adachi H, Doyu M, Minamiyama M, Sang C, Kobayashi Y, Inukai A, Sobue G. Leuprorelin rescues polyglutamine-dependent phenotypes in a transgenic mouse model of spinal and bulbar muscular atrophy. Nat Med 2003; 9:768-73. [PMID: 12754502 DOI: 10.1038/nm878] [Citation(s) in RCA: 222] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2002] [Accepted: 04/23/2003] [Indexed: 12/11/2022]
Abstract
Spinal and bulbar muscular atrophy (SBMA) is an adult-onset motor neuron disease that affects males. It is caused by the expansion of a polyglutamine (polyQ) tract in androgen receptors. Female carriers are usually asymptomatic. No specific treatment has been established. Our transgenic mouse model carrying a full-length human androgen receptor with expanded polyQ has considerable gender-related motor impairment. This phenotype was abrogated by castration, which prevented nuclear translocation of mutant androgen receptors. We examined the effect of androgen-blockade drugs on our mouse model. Leuprorelin, a lutenizing hormone-releasing hormone (LHRH) agonist that reduces testosterone release from the testis, rescued motor dysfunction and nuclear accumulation of mutant androgen receptors in male transgenic mice. Moreover, leuprorelin treatment reversed the behavioral and histopathological phenotypes that were once caused by transient increases in serum testosterone. Flutamide, an androgen antagonist promoting nuclear translocation of androgen receptors, yielded no therapeutic effect. Leuprorelin thus seems to be a promising candidate for the treatment of SBMA.
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Affiliation(s)
- Masahisa Katsuno
- Department of Neurology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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Adachi H, Katsuno M, Minamiyama M, Sang C, Pagoulatos G, Angelidis C, Kusakabe M, Yoshiki A, Kobayashi Y, Doyu M, Sobue G. Heat shock protein 70 chaperone overexpression ameliorates phenotypes of the spinal and bulbar muscular atrophy transgenic mouse model by reducing nuclear-localized mutant androgen receptor protein. J Neurosci 2003; 23:2203-11. [PMID: 12657679 PMCID: PMC6742038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Abstract
Spinal and bulbar muscular atrophy (SBMA) is an inherited motor neuron disease caused by the expansion of the polyglutamine (polyQ) tract within the androgen receptor (AR). The nuclear inclusions consisting of the mutant AR protein are characteristic and combine with many components of ubiquitin-proteasome and molecular chaperone pathways, raising the possibility that misfolding and altered degradation of mutant AR may be involved in the pathogenesis. We have reported that the overexpression of heat shock protein (HSP) chaperones reduces mutant AR aggregation and cell death in a neuronal cell model (Kobayashi et al., 2000). To determine whether increasing the expression level of chaperone improves the phenotype in a mouse model, we cross-bred SBMA transgenic mice with mice overexpressing the inducible form of human HSP70. We demonstrated that high expression of HSP70 markedly ameliorated the motor function of the SBMA model mice. In double-transgenic mice, the nuclear-localized mutant AR protein, particularly that of the large complex form, was significantly reduced. Monomeric mutant AR was also reduced in amount by HSP70 overexpression, suggesting the enhanced degradation of mutant AR. These findings suggest that HSP70 overexpression ameliorates SBMA phenotypes in mice by reducing nuclear-localized mutant AR, probably caused by enhanced mutant AR degradation. Our study may provide the basis for the development of an HSP70-related therapy for SBMA and other polyQ diseases.
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Affiliation(s)
- Hiroaki Adachi
- Department of Neurology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho Showa-ku, Nagoya 466-8550, Japan
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Sang C, Kobayashi Y, Du J, Katsumo M, Adachi H, Doyu M, Sobue G. c-Jun N-terminal kinase pathway mediates Lactacystin-induced cell death in a neuronal differentiated Neuro2a cell line. Brain Res Mol Brain Res 2002; 108:7-17. [PMID: 12480174 DOI: 10.1016/s0169-328x(02)00460-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The ubiquitin-proteasome pathway is an intracellular protein degradation pathway responsible for degradation of many regulatory proteins that must be rapidly eliminated normally. Some recent studies reported that a proteasome dysfunction was involved in the pathogenesis of neurodegenerative diseases. Thus, there is now considerable interest in the possible role of proteasome in this regard. Here we show that inhibition of proteasomal function by Lactacystin-induced cell death in a neuronal differentiated Neuro2a (nN2a) cell line but not in an undifferentiated Neuro2a (N2a) cell line. Cell death was accompanied by both the activation of c-Jun N-terminal kinase, p38 and caspase-3. A pan-caspase inhibitor, Z-VAD-FMK, or SB203580, a p38 inhibitor could not inhibit cell death induced by Lactacystin, whereas nN2a cell lines with stable expression of the dominant negative mutant of c-Jun N-terminal kinase showed a remarkable suppression of cell death. Lactacystin-induced cell death is mediated through the c-Jun N-terminal kinase pathway but not the caspase-dependent pathway in a nN2a cell line. Our results shed light on the association among the proteasomal dysfunction, JNK pathway and neuronal cell death, leading to the elucidation of its possible role in the pathogenesis of neurodegenerative diseases.
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Affiliation(s)
- Chen Sang
- Department of Neurology, Nagoya University, Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Aichi, Japan
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Katsuno M, Adachi H, Kume A, Li M, Nakagomi Y, Niwa H, Sang C, Kobayashi Y, Doyu M, Sobue G. Testosterone reduction prevents phenotypic expression in a transgenic mouse model of spinal and bulbar muscular atrophy. Neuron 2002; 35:843-54. [PMID: 12372280 DOI: 10.1016/s0896-6273(02)00834-6] [Citation(s) in RCA: 367] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Spinal and bulbar muscular atrophy (SBMA) is a polyglutamine disease caused by the expansion of a CAG repeat in the androgen receptor (AR) gene. We generated a transgenic mouse model carrying a full-length AR containing 97 CAGs. Three of the five lines showed progressive muscular atrophy and weakness as well as diffuse nuclear staining and nuclear inclusions consisting of the mutant AR. These phenotypes were markedly pronounced in male transgenic mice, and dramatically rescued by castration. Female transgenic mice showed only a few manifestations that markedly deteriorated with testosterone administration. Nuclear translocation of the mutant AR by testosterone contributed to the phenotypic difference with gender and the effects of hormonal interventions. These results suggest the therapeutic potential of hormonal intervention for SBMA.
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Affiliation(s)
- Masahisa Katsuno
- Department of Neurology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Japan
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Adachi H, Kume A, Li M, Nakagomi Y, Niwa H, Do J, Sang C, Kobayashi Y, Doyu M, Sobue G. Transgenic mice with an expanded CAG repeat controlled by the human AR promoter show polyglutamine nuclear inclusions and neuronal dysfunction without neuronal cell death. Hum Mol Genet 2001; 10:1039-48. [PMID: 11331614 DOI: 10.1093/hmg/10.10.1039] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We generated transgenic mice that expressed a highly expanded 239 polyglutamine (polyQ) repeat under the control of the human androgen receptor promoter. These transgenic mice developed progressive neurological phenotypes of muscular weakness and ataxia, small body size and short life-span. PolyQ nuclear inclusions (NIs) were remarkable and widespread but found in selective regions of the central nervous system (CNS) such as the spinal cord, cerebrum and cerebellum as well as in selective peripheral visceral organs. This distribution pattern resembled that of spinal and bulbar muscular atrophy somewhat, but was more widespread. In neuronal tissues, NIs were present in astrocytes as well as neurons. Cytoplasmic and axonal inclusions were not observed. In the CNS regions with abundant NIs, neuronal populations were well-preserved, and neither neuronal cell death, reactive astrogliosis nor microglial invasions were detected. These findings suggest that polyQ alone can induce the neuronal dysfunction that precedes gross neuronal degeneration and provides a clue for investigating molecular mechanisms that underly the pathway to neuronal dysfunction from polyQ expansion.
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Affiliation(s)
- H Adachi
- Department of Neurology, Nagoya University School of Medicine, 65 Tsurumai-cho Showa-ku, Nagoya 466-8550, Japan
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Dionne RA, Max MB, Gordon SM, Parada S, Sang C, Gracely RH, Sethna NF, MacLean DB. The substance P receptor antagonist CP-99,994 reduces acute postoperative pain. Clin Pharmacol Ther 1998; 64:562-8. [PMID: 9834049 DOI: 10.1016/s0009-9236(98)90140-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Animal studies suggest that substance P, a peptide that preferentially activates the neurokinin-1 (NK1) receptor, is involved in pain transmission, with particular importance in pain after inflammation. METHODS The analgesic efficacy of CP-99,994, a NK1 receptor antagonist, was compared with ibuprofen and placebo in 78 subjects undergoing third molar extraction. The initial 60 subjects randomly received 1 of 3 possible treatments in a double-blind fashion before oral surgery: 750 microg/kg CP-99,994 infused intravenously over 5 hours on a tapering regimen starting 2 hours before surgery, 600 mg oral ibuprofen 30 minutes before surgery, or placebo. In a second study, 18 subjects were randomized to the same regimens starting 30 minutes before surgery to maximize the amount of CP-99,994 circulating during pain onset. RESULTS In the first study, ibuprofen significantly reduced pain, as measured by visual analog scale, from 90 to 240 minutes postoperatively compared with placebo. CP-99,994 produced analgesia that was significant at 90 minutes (P < 0.01 compared with placebo), but not at subsequent time points. In the second study, ibuprofen and, to a lesser extent, CP-99,994 significantly suppressed pain in comparison to placebo at 60, 90, and 120 minutes (P < 0.05). The incidence of side effects was similar across groups. CONCLUSIONS This replicate demonstration that a NK1 receptor blocker relieves clinical pain supports the hypothesis that substance P contributes to the generation of pain in humans. The reduction in postoperative pain at doses not producing side effects suggests that NK1 antagonists may be clinically useful.
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Affiliation(s)
- R A Dionne
- Pain and Neurosensory Mechanisms Branch, National Institute of Dental Research, National Institutes of Health, Bethesda, MD 20892-1258, USA
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Sang C, Yin X, Man H, Chen J. [The analysis of fatty acid composition in syncytiotrophoblast plasma membranes of human placenta]. Se Pu 1998; 16:84-6. [PMID: 11324491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
The fatty acids were determined in syncytiotrophoblast plasma membranes of the eighteen human placenta from the normal pregnant women. With the method of Landon, the fat was purified in syncytiotrophoblast plasma membranes, which was extracted from the placenta by using the procedure of Whitsett. The methylated fatty acids were separated with gas chromatography in which a glass column packed with DEGS was used. In comparing the retention time of the sample with the standards and referring to the results of GC/MS, thirteen peaks were identified and quantified. The area normalization method was used to determine the distribution, the compositions and contents of fatty acids in syncytiotrophoblast plasma membranes. It is shown that the amount of identified fatty acids attains 74.1% of total peak area, in which the amount of saturated fatty acids was 30.64%, and the unsaturated was 43.46%.
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Affiliation(s)
- C Sang
- First Hospital Affiliated Dalian Medical University, Dalian, 116011
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Lange A, Wright RA, Al-Nafusi A, Sang C, Palka P, Sutherland GR. Doppler myocardial imaging: a new method of data acquisition for three-dimensional echocardiography. J Am Soc Echocardiogr 1996; 9:918-21. [PMID: 8943461 DOI: 10.1016/s0894-7317(96)90493-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The precise morphologic characteristics of any intracardiac tumor have important implications regarding surgical planning and operative repair. Three-dimensional echocardiography has proved to be a valuable clinical technique in this field. Current methods of three-dimensional reconstruction of two-dimensional images are based on the standard gray-scale imaging technique. However, precordial gray-scale data-set information is frequently of suboptimal quality because of data degradation caused by ultrasound attenuation by chest wall structures. This has limited the use of the transthoracic three-dimensional technique to "echogenic" patients. Doppler myocardial imaging (DMI), a new ultrasound technique based on the Doppler principle, is influenced less by chest wall attenuation and in addition offers a better boundary detection algorithm for the cardiac structures. To determine if there may be a potential benefit of DMI to acquire data for three-dimensional reconstruction, a 33-year-old woman with a large intracardiac mass was studied. In this case three-dimensional gray-scale and DMI data sets were compared and contrasted with pathologic information. DMI allowed both the qualification of mass volume and the correct definition of the morphology of the mass. It was also possible to identify the precise site of attachment of the mass to the mitral valve leaflets. The information thus obtained was correlated with both operative and pathologic findings.
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Affiliation(s)
- A Lange
- Department of Cardiology, Western General Hospital, Edinburgh, Scotland, UK
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Byrant R, Kline NE, Kline MW, Wilson K, Sang C, Barber GM. Making decisions about amputation in an adolescent male. Cancer Pract 1996; 4:11-14. [PMID: 8788765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- R Byrant
- Egleston Children's Hospital, Atlanta, Georgia, USA
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Abstract
A linear (frequency-domain) model of the cat cochlea (implemented in both 1- and 2-dimensional versions) has been developed which uses outer hair cell (OHC) forces in a geometry which includes the longitudinal (base-to-apex) tilt of the outer hair cells (OHCs). When positive (contractile) real OHC force-constants are used, very large (50 + dB) response peaks along with very rapidly accumulating phase lags (which can reach -50 pi radians) are obtained. The wider the longitudinal segmentation, the broader the peaks and the less the phase accumulation; 71-microns segmentation produced the most realistic responses. These large response peaks are achieved by a small zone of negative resistance (ca. 1 mm) just basal to the response peak and the virtual 'zeroing' of the basilar membrane's effective impedance over the entire peak region (ca. 2.5 mm). To produce these peaks, the OHCs generate about 25-times the incoming acoustic power. Inclusion of low-pass filtering in the model's OHC representation produces, by contrast, very unrealistic notch-and-peak displacement complexes accompanied by very large phase lags, for all segmentation widths used. However, when phase reversals of OHC forces are also added, achieved by imbedding a resonant system within the tectorial membrane, very realistic peaks and phase functions are produced. More power must, however, be generated by the OHCs (about 70-times the incoming). The end result is output which mimics quite closely the living basilar membrane's responses to low-intensity high-frequency tones.
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Affiliation(s)
- C D Geisler
- Department of Neurophysiology, University of Wisconsin-Madison 53706, USA
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Sang C, Caves PK, Davidson KG, Miller HC, Kitchin AH. Proceedings: Initial clinical experience with stented porcine aortic valve xenograft. Heart 1976; 38:875-6. [PMID: 973914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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