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Yao M, Jiang X, Xiao F, Lv X, Sheng M, Xing W, Bai J, Zhou Y. Targeting BIRC5 as a Therapeutic Approach to Overcome ASXL1-associated Decitabine Resistance. Cancer Lett 2024:216949. [PMID: 38729558 DOI: 10.1016/j.canlet.2024.216949] [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: 01/11/2024] [Revised: 04/26/2024] [Accepted: 05/03/2024] [Indexed: 05/12/2024]
Abstract
Hypomethylating agents (HMAs) are widely employed in the treatment of myeloid malignancies. However, unresponsive or resistant to HMA occurs in approximately 50% of patients. ASXL1, one of the most commonly mutated genes across the full spectrum of myeloid malignancies, has been reported to predict a lower overall response rate to HMAs, suggesting an essential need to develop effective therapeutic strategies for the patients with HMA failure. Here, we investigated the impact of ASXL1 on cellular responsiveness to decitabine treatment. ASXL1 deficiency increased resistance to decitabine treatment in AML cell lines and primary mouse bone marrow cells. Transcriptome sequencing revealed significant alterations in genes regulating cell cycle, apoptosis, and histone modification in ASXL1 deficient cells that resistant to decitabine. BIRC5 was identified as a potential target for overcoming decitabine resistance in ASXL1 deficient cells. Furthermore, our experimental evidence demonstrated that the small-molecule inhibitor of BIRC5 (YM-155) synergistically sensitized ASXL1 deficient cells to decitabine treatment. This study sheds light on the molecular mechanisms underlying the ASXL1-associated HMA resistance and proposes a promising therapeutic strategy for improving treatment outcomes in affected individuals.
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Affiliation(s)
- Ming Yao
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China;; Tianjin Institutes of Health Science, Tianjin 301600, China
| | - Xiao Jiang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China;; Institutes of Biomedical Sciences, Medical College of Fudan University, Shanghai 200032, China
| | - Fangnan Xiao
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China;; Tianjin Institutes of Health Science, Tianjin 301600, China
| | - Xue Lv
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China;; Tianjin Institutes of Health Science, Tianjin 301600, China
| | - Mengyao Sheng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China;; Institutes of Biomedical Sciences, Medical College of Fudan University, Shanghai 200032, China
| | - Wen Xing
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China;; Tianjin Institutes of Health Science, Tianjin 301600, China
| | - Jie Bai
- Department of Hematology, The Second Affiliated Hospital of Tianjin Medical University, Tianjin 300211, China.
| | - Yuan Zhou
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China;; Tianjin Institutes of Health Science, Tianjin 301600, China;.
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2
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Xie J, Sheng M, Rong S, Zhou D, Wang C, Wu W, Huang J, Sun Y, Wang Y, Chen P, Wu Y, Wang Y, Wang L, Zhou BO, Huang X, Walsh CP, Bohlander SK, Huang J, Wang X, Xu GL, Gao H, Shi Y. STING activation in TET2-mutated hematopoietic stem/progenitor cells contributes to the increased self-renewal and neoplastic transformation. Leukemia 2023; 37:2457-2467. [PMID: 37816954 PMCID: PMC10681905 DOI: 10.1038/s41375-023-02055-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 06/01/2023] [Revised: 09/13/2023] [Accepted: 09/29/2023] [Indexed: 10/12/2023]
Abstract
Somatic loss-of-function mutations of the dioxygenase Ten-eleven translocation-2 (TET2) occur frequently in individuals with clonal hematopoiesis (CH) and acute myeloid leukemia (AML). These common hematopoietic disorders can be recapitulated in mouse models. However, the underlying mechanisms by which the deficiency in TET2 promotes these disorders remain unclear. Here we show that the cyclic guanosine monophosphate-adenosine monophosphate synthase (cGAS)-stimulator of interferon genes (STING) pathway is activated to mediate the effect of TET2 deficiency in dysregulated hematopoiesis in mouse models. DNA damage arising in Tet2-deficient hematopoietic stem/progenitor cells (HSPCs) leads to activation of the cGAS-STING pathway which in turn promotes the enhanced self-renewal and development of CH. Notably, both pharmacological inhibition and genetic deletion of STING suppresses Tet2 mutation-induced aberrant hematopoiesis. In patient-derived xenograft (PDX) models, STING inhibition specifically attenuates the proliferation of leukemia cells from TET2-mutated individuals. These observations suggest that the development of CH associated with TET2 mutations is powered through chronic inflammation dependent on the activated cGAS-STING pathway and that STING may represent a potential target for intervention of relevant hematopoietic diseases.
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Affiliation(s)
- Jiaying Xie
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Mengyao Sheng
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Shaoqin Rong
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Dan Zhou
- Center for Medical Research and Innovation, Shanghai Pudong Hospital, Institutes of Biomedical Sciences, Medical College of Fudan University, Shanghai, 201399, China
| | - Chao Wang
- China State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Wanling Wu
- Department of Hematology, Huashan Hospital, Fudan University, Shanghai, 200024, China
| | - Jingru Huang
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Yue Sun
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Yin Wang
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Pingyue Chen
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Yushuang Wu
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Yuanxian Wang
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Lan Wang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Bo O Zhou
- China State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Xinxin Huang
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China
| | - Colum P Walsh
- Genomic Medicine Research Group, Biomedical Sciences, Ulster University, Coleraine, BT52 1SA, UK
- Centre for Research and Development, Region Gävleborg/Uppsala University, Gävle, Sweden
| | - Stefan K Bohlander
- Leukaemia & Blood Cancer Research Unit, Department of Molecular Medicine and Pathology, The University of Auckland, Auckland, New Zealand
| | - Jian Huang
- Coriell Institute for Medical Research, Camden, NJ, 08103, USA
- Temple University Lewis Katz School of Medicine, Center for Metabolic Disease Research, Philadelphia, PA, 19140, USA
| | - Xiaoqin Wang
- Department of Hematology, Huashan Hospital, Fudan University, Shanghai, 200024, China
| | - Guo-Liang Xu
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China.
- China State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, 200031, China.
| | - Hai Gao
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China.
| | - Yuheng Shi
- Institutes of Biomedical Sciences, Shanghai Xuhui Central Hospital, Medical College of Fudan University, Chinese Academy of Medical Sciences (RU069), Shanghai, 200032, China.
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Shanghai, Huadong Hospital, Shanghai, 200040, China.
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Liu W, Lu JY, Wang YJ, Xu XX, Chen YC, Yu SX, Xiang XW, Chen XZ, Jiu Y, Gao H, Sheng M, Chen ZJ, Hu X, Li D, Maiuri P, Huang X, Ying T, Xu GL, Pang DW, Zhang ZL, Liu B, Liu YJ. Vaccinia virus induces EMT-like transformation and RhoA-mediated mesenchymal migration. J Med Virol 2023; 95:e29041. [PMID: 37621182 DOI: 10.1002/jmv.29041] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/17/2023] [Accepted: 08/09/2023] [Indexed: 08/26/2023]
Abstract
The emerging outbreak of monkeypox is closely associated with the viral infection and spreading, threatening global public health. Virus-induced cell migration facilitates viral transmission. However, the mechanism underlying this type of cell migration remains unclear. Here we investigate the motility of cells infected by vaccinia virus (VACV), a close relative of monkeypox, through combining multi-omics analyses and high-resolution live-cell imaging. We find that, upon VACV infection, the epithelial cells undergo epithelial-mesenchymal transition-like transformation, during which they lose intercellular junctions and acquire the migratory capacity to promote viral spreading. After transformation, VACV-hijacked RhoA signaling significantly alters cellular morphology and rearranges the actin cytoskeleton involving the depolymerization of robust actin stress fibers, leading-edge protrusion formation, and the rear-edge recontraction, which coordinates VACV-induced cell migration. Our study reveals how poxviruses alter the epithelial phenotype and regulate RhoA signaling to induce fast migration, providing a unique perspective to understand the pathogenesis of poxviruses.
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Affiliation(s)
- Wei Liu
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Jia-Yin Lu
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Ya-Jun Wang
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Xin-Xin Xu
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Yu-Chen Chen
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Sai-Xi Yu
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Xiao-Wei Xiang
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Xue-Zhu Chen
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Yaming Jiu
- The Center for Microbes, Development and Health, Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Hai Gao
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Mengyao Sheng
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Zheng-Jun Chen
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Xinyao Hu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, College of Life Sciences, Institute of Biophysics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Dong Li
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, College of Life Sciences, Institute of Biophysics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Paolo Maiuri
- Department of Molecular Medicine and Medical Biotechnology, Università degli Studi di Napoli Federico II, Naples, Italy
| | - Xinxin Huang
- Shanghai Key Laboratory of Medical Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Tianlei Ying
- MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Guo-Liang Xu
- Shanghai Key Laboratory of Medical Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Dai-Wen Pang
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Frontiers Science Center for New Organic Matter, Research Center for Analytical Sciences, Frontiers Science Center for Cell Responses, College of Chemistry, Nankai University, Tianjin, China
| | - Zhi-Ling Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
| | - Baohong Liu
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
| | - Yan-Jun Liu
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Shanghai Key Laboratory of Medical Epigenetics, Shanghai Stomatological Hospital, Institutes of Biomedical Sciences, Department of Chemistry, Fudan University, Shanghai, China
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4
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Meng B, Sheng M, Qu XP, Wang SX, Zhang H. [A case of bicuspid aortic valve malformation combined with Turner syndrome]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:818-821. [PMID: 34404194 DOI: 10.3760/cma.j.cn112148-20210707-00576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- B Meng
- Department of Cardiac Surgery, Children's Hospital Affiliated to the Capital Institute of Paediatrics, Beijing 100020, China
| | - M Sheng
- Department of Cardiac Surgery, Children's Hospital Affiliated to the Capital Institute of Paediatrics, Beijing 100020, China
| | - X P Qu
- Department of Cardiac Surgery, Children's Hospital Affiliated to the Capital Institute of Paediatrics, Beijing 100020, China
| | - S X Wang
- Department of Cardiac Surgery, Children's Hospital Affiliated to the Capital Institute of Paediatrics, Beijing 100020, China
| | - H Zhang
- Department of Cardiac Surgery, Children's Hospital Affiliated to the Capital Institute of Paediatrics, Beijing 100020, China
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Wagner MW, Hainc N, Khalvati F, Namdar K, Figueiredo L, Sheng M, Laughlin S, Shroff MM, Bouffet E, Tabori U, Hawkins C, Yeom KW, Ertl-Wagner BB. Radiomics of Pediatric Low-Grade Gliomas: Toward a Pretherapeutic Differentiation of BRAF-Mutated and BRAF-Fused Tumors. AJNR Am J Neuroradiol 2021; 42:759-765. [PMID: 33574103 DOI: 10.3174/ajnr.a6998] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 10/23/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND AND PURPOSE B-Raf proto-oncogene, serine/threonine kinase (BRAF) status has important implications for prognosis and therapy of pediatric low-grade gliomas. Currently, BRAF status classification relies on biopsy. Our aim was to train and validate a radiomics approach to predict BRAF fusion and BRAF V600E mutation. MATERIALS AND METHODS In this bi-institutional retrospective study, FLAIR MR imaging datasets of 115 pediatric patients with low-grade gliomas from 2 children's hospitals acquired between January 2009 and January 2016 were included and analyzed. Radiomics features were extracted from tumor segmentations, and the predictive model was tested using independent training and testing datasets, with all available tumor types. The model was selected on the basis of a grid search on the number of trees, opting for the best split for a random forest. We used the area under the receiver operating characteristic curve to evaluate model performance. RESULTS The training cohort consisted of 94 pediatric patients with low-grade gliomas (mean age, 9.4 years; 45 boys), and the external validation cohort comprised 21 pediatric patients with low-grade gliomas (mean age, 8.37 years; 12 boys). A 4-fold cross-validation scheme predicted BRAF status with an area under the curve of 0.75 (SD, 0.12) (95% confidence interval, 0.62-0.89) on the internal validation cohort. By means of the optimal hyperparameters determined by 4-fold cross-validation, the area under the curve for the external validation was 0.85. Age and tumor location were significant predictors of BRAF status (P values = .04 and <.001, respectively). Sex was not a significant predictor (P value = .96). CONCLUSIONS Radiomics-based prediction of BRAF status in pediatric low-grade gliomas appears feasible in this bi-institutional exploratory study.
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Affiliation(s)
- M W Wagner
- From the Departments of Diagnostic Imaging (M.W.W., N.H., F.K., K.N., M.S., S.L., M.M.S., B.B.E.-W.)
| | - N Hainc
- From the Departments of Diagnostic Imaging (M.W.W., N.H., F.K., K.N., M.S., S.L., M.M.S., B.B.E.-W.).,Department of Neuroradiology (N.H.), Zurich University Hospital, University of Zurich, Zurich, Switzerland
| | - F Khalvati
- From the Departments of Diagnostic Imaging (M.W.W., N.H., F.K., K.N., M.S., S.L., M.M.S., B.B.E.-W.)
| | - K Namdar
- From the Departments of Diagnostic Imaging (M.W.W., N.H., F.K., K.N., M.S., S.L., M.M.S., B.B.E.-W.)
| | - L Figueiredo
- Division of Neuroradiology, Neurooncology (L.F., E.B., U.T.)
| | - M Sheng
- From the Departments of Diagnostic Imaging (M.W.W., N.H., F.K., K.N., M.S., S.L., M.M.S., B.B.E.-W.)
| | - S Laughlin
- From the Departments of Diagnostic Imaging (M.W.W., N.H., F.K., K.N., M.S., S.L., M.M.S., B.B.E.-W.)
| | - M M Shroff
- From the Departments of Diagnostic Imaging (M.W.W., N.H., F.K., K.N., M.S., S.L., M.M.S., B.B.E.-W.)
| | - E Bouffet
- Division of Neuroradiology, Neurooncology (L.F., E.B., U.T.)
| | - U Tabori
- Division of Neuroradiology, Neurooncology (L.F., E.B., U.T.)
| | - C Hawkins
- Paediatric Laboratory Medicine (C.H.), Division of Pathology, The Hospital for Sick Children and Department of Medical Imaging, University of Toronto, Ontario, Canada
| | - K W Yeom
- Department of Radiology (K.W.Y.), Stanford University School of Medicine, Lucile Packard Children's Hospital, Palo Alto, California
| | - B B Ertl-Wagner
- From the Departments of Diagnostic Imaging (M.W.W., N.H., F.K., K.N., M.S., S.L., M.M.S., B.B.E.-W.)
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Yang Z, Xu J, Sheng M, Qiu J, Zhu J, Zhang J, He J. Crenobacter caeni sp. nov. Isolated from Sludge. Curr Microbiol 2020; 77:4180-4185. [PMID: 33047166 DOI: 10.1007/s00284-020-02233-7] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 09/29/2020] [Indexed: 11/26/2022]
Abstract
Strain HX-7-9T was isolated from the activated sludge collected from the outlet of the biochemical treatment facility of agricultural chemical plant in Nanjing, Jiangsu province, PR China. Strain HX-7-9T is Gram staining-negative, rod-shaped, non-spore-forming and flagellated. The 16S rRNA gene-based phylogenetic analysis indicate that strain HX-7-9T belongs to the genus Crenobacter, moderately related to Crenobacter luteus YIM-78141T (94.8% similarity). The genomic DNA G+C content of the strain was 67.5 mol%. Strain HX-7-9T was able to grow at 16-45 °C (optimum at 37 °C), at pH 6.0-8.0 (optimum at pH 7.0) and with 0-1% (w/v) NaCl (optimum at 0). Predominant fatty acid constituents were C16:0 and summed feature 3 (C16:1ω7c and/or C16:1ω6c). The respiratory ubiquinone was Q-8. The polar lipid profile is composed of diphosphatidylglycerol (DPG), phosphatidylmonomethylethanolamine (PME), phosphatidylethanolamine (PE), phospholipids (PL), glycolipid (GL) and aminophospholipid (APL). The ANI and dDDH values obtained between the genomes of HX-7-9T and C. luteus YIM-78141T were 79.8 and 19.1%, respectively. On the basis of data from phenotypic, chemotaxonomic and genotypic analysis, strain HX-7-9T represents a novel species of the genus Crenobacter, for which the name Crenobacter caeni sp. nov. is proposed. The type strain is HX-7-9T (= KCTC 72654T = CCTCC AB 2019349T).
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Affiliation(s)
- Zhou Yang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jianyi Xu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Mengyao Sheng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jiguo Qiu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jianchun Zhu
- Laboratory Centre of Life Science, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jun Zhang
- The College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
| | - Jian He
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
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Sheng M, Wei N, Yang HY, Yan M, Zhao QX, Jing LJ. CircRNA UBAP2 promotes the progression of ovarian cancer by sponging microRNA-144. Eur Rev Med Pharmacol Sci 2020; 23:7283-7294. [PMID: 31539115 DOI: 10.26355/eurrev_201909_18833] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This study aims to elucidate the regulatory effect of circular RNA UBAP2 (circUBAP2) on the progression of ovarian cancer (OC). PATIENTS AND METHODS Quantitative Real Time-Polymerase Chain Reaction (qRT-PCR) was used to detect the expressions of circUBAP2, microRNA-144 and CHD2 in OC tissues and adjacent normal tissues. The correlation between the expression levels of circUBAP2 and microRNA-144 with pathological parameters of OC patients was analyzed. Subcellular distribution of circUBAP2 was detected by chromatin fractionation assay. After overexpression of circUBAP2 in OC cells, changes in proliferative and migratory abilities were evaluated by Cell Counting Kit-8 (CCK-8) and transwell assay, respectively. In addition, the Dual-Luciferase reporter gene assay was used to verify the binding of circUBAP2 and microRNA-144, and the binding of CHD2 to microRNA-144. RESULTS QRT-PCR results showed that circUBAP2 was highly expressed in OC tissues, and its expression was negatively correlated with TMN stage and five-year survival of OC patients. CircUBAP2 was mainly distributed in the cytoplasm. Overexpression of circUBAP2 significantly promoted the proliferative and migratory abilities of OC cells. The Dual-Luciferase reporter gene assay demonstrated that circUBAP2 could bind to microRNA-144. Meanwhile, circUBAP2 negatively regulated microRNA-144 expression in OC cells. Besides, the promotive effects of circUBAP2 on the proliferation and migration of OC cells were reversed by microRNA-144 overexpression. MicroRNA-144 was lowly expressed in OC tissues, which was negatively correlated with TNM stage of OC patients. The Dual-Luciferase reporter gene assay confirmed the binding condition between CHD2 and microRNA-144. CHD2 expression was negatively regulated by microRNA-144 in OC cells. Moreover, CHD2 could bind to microRNA-144 and partially inhibited its activity, thereby promoting the proliferative and migratory abilities of OC cells. CONCLUSIONS CircUBAP2 promotes the progression of ovarian cancer by adsorbing microRNA-144.
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Affiliation(s)
- M Sheng
- Department of Obstetrics, Weifang Yidu Center Hospital, Weifang, China.
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Sheng M, Liu B, Xu J, Peng Q, Zhang L, Chen K, He J. Cloning of a novel topramezone-resistant 4-hydroxyphenylpyruvate dioxygenase gene and improvement of its resistance through pressure acclimation. Enzyme Microb Technol 2020; 140:109642. [DOI: 10.1016/j.enzmictec.2020.109642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 07/07/2020] [Accepted: 08/04/2020] [Indexed: 10/23/2022]
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Xu J, Sheng M, Yang Z, Qiu J, Zhang J, Zhang L, He J. Caenimonas sedimenti sp. nov., Isolated from Sediment of the Wastewater Outlet of an Agricultural Chemical Plant. Curr Microbiol 2020; 77:3767-3772. [PMID: 32748162 DOI: 10.1007/s00284-020-02145-6] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 07/22/2020] [Indexed: 10/23/2022]
Abstract
A novel bacterial strain, designated HX-9-20T, was isolated from the sediment collected from the wastewater outlet of an agricultural chemical plant in Maanshan city, Anhui province, PR China. Cells of strain HX-9-20T were Gram-staining-negative, rod-shaped, translucent, non-motile, and strictly aerobic. Growth was observed between 15 and 35 °C (optimum 30 °C), at pH 6.0-8.0 (optimum pH 7.0), and in the presence of 0-0.4% (w/v) NaCl (optimum 0.2%). The predominant cellular fatty acids were summed feature 3 (C16:1 ω7c and/or C16:1 ω6c), C16:0 and summed feature 8 (C18:1 ω6c and/or C18:1 ω7c). The major quinone was ubiquinone Q-8. The major polar lipids were phosphatidylglycerol, phosphatidylethanolamine, and an aminophospholipid. Strain HX-9-20T contains 2-hydroxyputrescine and putrescine as the major polyamine. A phylogenetic analysis based on 16S rRNA gene sequences revealed that strain HX-9-20T was affiliated with the genus Caenimonas, exhibiting the highest sequence similarities with Caenimonas koreensis EMB320T (97.3% similarity) and Ramlibacter humi 18×22-1T (97.0%), and less than 97.0% similarity with other type strains. The average nucleotide identity (ANI) and digital DNA-DNA hybridization values (dDDH) between HX-9-20T and C. koreensis EMB320T were 76.9% and 23.5% respectively. The ANI and dDDH between HX-9-20T and R. humi 18×22-1T were 80.3% and 23.6%, respectively. The G + C content of the genomic DNA was 67.5 mol%. On the basis of the polyphasic taxonomic data, strain HX-9-20T represents a novel species of the genus Caenimonas, for which the name Caenimonas sedimenti sp. nov. is proposed. The type strain is HX-9-20T (=KCTC 72473T=CCTCC AB 2019266T).
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Affiliation(s)
- Jianyi Xu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Mengyao Sheng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Zhou Yang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jiguo Qiu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
| | - Jun Zhang
- The College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
| | - Lei Zhang
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, Nanchong, 637099, Sichuan, China
| | - Jian He
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China.
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10
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Liu B, Yang X, Sheng M, Yang Z, Qiu J, Wang C, He J. Sphingobacterium olei sp. nov., isolated from oil-contaminated soil. Int J Syst Evol Microbiol 2020; 70:1931-1939. [DOI: 10.1099/ijsem.0.004000] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, rod-shaped, non-motile and non-spore-forming bacterium, designated HAL-9T, was isolated from oil-contaminated soil in Daqing oilfield, Heilongjiang Province, PR China. Strain HAL-9T was able to degrade quizalofop-p-ethyl and diclofop-methyl. Growth was observed at 10–35 °C (optimum, 30 °C), pH 6.0–10.0 (optimum, pH 7.0) and salinity of 0 %–5.0 % (w/v; optimum 1.0 %). The results of phylogenetic analysis based on the 16S rRNA gene indicated that strain HAL-9T belongs to the genus
Sphingobacterium
and showed the highest sequence similarity (98.3 %) to
Sphingobacterium alkalisoli
Y3L14T, followed by
Sphingobacterium mizutaii
DSM 11724T (95.1 %) and
Sphingobacterium lactis
DSM 22361T (95.1 %). Menaquinone-7 (MK-7) was the only isoprenoid quinone. The predominant cellular fatty acids were summed feature 3 (C16 : 1
ω7c and/or C16 : 1
ω6c), iso-C15: 0 and iso-C17 : 0 3-OH. The major polar lipids were phosphatidylethanolamine, three phosphoglycolipids and three unidentified lipids. The draft genome of strain HAL-9T was 5.41 Mb. The G+C content of strain HAL-9T was 40.6 mol%. Furthermore, the average nucleotide identity and in silico DNA–DNA hybridization values between strain HAL-9T and
S. alkalisoli
Y3L14T were 86.2 % and 32.8 %, respectively, which were below the standard thresholds for species differentiation. On the basis of phenotypic, genotypic and phylogenetic evidence, strain HAL-9T represents a novel species in the genus
Sphingobacterium
, for which the name Sphingobacterium olei sp. nov. is proposed. The type strain is HAL-9T (=ACCC 61581T=CCTCC AB 2019176T=KCTC 72287T).
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Affiliation(s)
- Bin Liu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Xiaojun Yang
- Nanjing Customs, Nanjing, Jiangsu 210001, PR China
| | - Mengyao Sheng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Zhou Yang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Jiguo Qiu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Chenghong Wang
- College of Basic Medical Science, Jiujiang University, Jiujiang, Jiangxi, PR China
| | - Jian He
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
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11
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Peng Q, Sheng M, Yang Z, Ni H, Li Q, Li Y, He J. Extensimonas perlucida sp. nov., a Novel Bacterium Isolated from Sludge. Curr Microbiol 2020; 77:1316-1320. [PMID: 32060766 DOI: 10.1007/s00284-020-01911-w] [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: 10/28/2019] [Accepted: 01/30/2020] [Indexed: 11/26/2022]
Abstract
A bacterium, designated HX2-24 T, was isolated from activated sludge treating pesticide-manufacturing wastewater. Colonies of the strain on nutrient agar were circular, transparent, and colorless. Strain HX2-24 T shared 98.1% 16S rRNA gene sequence similarity with Extensimonas vulgaris S4T, and less than 97% similarities with other type strains. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the strain formed a clade with E. vulgaris S4T. The major cellular fatty acids were C16:0, summed feature 3 (C16:1ω7c and/or C16:1ω6c) and C17:0 cyclo, the major polar lipids were phosphatidylethanolamine (PE), phosphatidylglycerol (PG), diphosphatidylglycerol (DPG), aminophospholipid (APL), glycophospholipid (GPL), and aminoglycolipid (AGL). The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between HX2-24 T and E. vulgaris S4T were 92% and 41%, respectively. The G + C content of strain HX2-24 T was 64.4 mol%. Thus, based on the phenotypic, chemotaxonomic, and genotypic characteristics, strain HX2-24 T represents a novel species in the genus Extensimonas, for which the name Extensimonas perlucida HX2-24 T sp. nov. is proposed. The type strain is HX2-24 T (= KCTC 72472 T = CCTCC AB 2019178 T).
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Affiliation(s)
- Qian Peng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Mengyao Sheng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Zhou Yang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Haiyan Ni
- College of Life Science, Jiangxi Normal University, Jiangxi, 330022, People's Republic of China
| | - Qinfen Li
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China
| | - Yi Li
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, People's Republic of China.
| | - Jian He
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
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12
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Liu B, Peng Q, Sheng M, Ni H, Xiao X, Tao Q, He Q, He J. Isolation and Characterization of a Topramezone-Resistant 4-Hydroxyphenylpyruvate Dioxygenase from Sphingobium sp. TPM-19. J Agric Food Chem 2020; 68:1022-1029. [PMID: 31884791 DOI: 10.1021/acs.jafc.9b06871] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Topramezone is a 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitor. Due to its broad-spectrum, high efficiency, and low toxicity, topramezone is a candidate herbicide for the construction of genetically modified (GM) herbicide-resistant crops. In the present study, we screened a topramezone-resistant isolate Sphingobium sp. TPM-19 and cloned a topramezone-resistant HPPD gene (SphppD) from this isolate. SpHPPD shared the highest similarity (53%) with an HPPD from Vibrio vulnificus CMCP6. SpHPPD was synthesized in Escherichia coli BL21(DE3) and purified to homogeneity using Co2+-affinity chromatography. SpHPPD was found to be a monomer. The Km and kcat of SpHPPD for 4-hydroxyphenylpyruvate (4-HPP) were 82.8 μM and 15.0 s-1, respectively. SpHPPD showed high resistance to topramezone with half maximal inhibitory concentration (IC50) and Ki values of 5.2 and 2.5 μM, respectively. Additionally, SpHPPD also showed high resistance to isoxaflutole (DKN) (IC50: 8.7 μM; Ki: 6.0 μM) and mesotrione (IC50: 4.2 μM; Ki: 1.3 μM) and moderate resistance to tembotrione (IC50: 2.5 μM; Ki: 1.0 μM). The introduction of the SphppD gene into Arabidopsis thaliana enhanced obvious resistance against topramezone. In conclusion, this study provides a novel topramezone-resistant HPPD gene for the genetic engineering of GM herbicide-resistant crops.
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Affiliation(s)
- Bin Liu
- Department of Microbiology, Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , P. R. China
| | - Qian Peng
- Department of Microbiology, Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , P. R. China
| | - Mengyao Sheng
- Department of Microbiology, Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , P. R. China
| | - Haiyan Ni
- College of Life Science , Jiangxi Normal University , Nanchang 330022 , Jiangxi , China
| | - Xiang Xiao
- DBN Biotech Center, Beijing DBN Technology Group Co., Ltd. , Beijing 100193 , P. R. China
| | - Qing Tao
- DBN Biotech Center, Beijing DBN Technology Group Co., Ltd. , Beijing 100193 , P. R. China
| | - Qin He
- Department of Microbiology, Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , P. R. China
| | - Jian He
- Department of Microbiology, Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , P. R. China
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13
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He Q, Peng H, Sheng M, Hu S, Qiu J, Gu J. Humidity Control Strategies for Solid-State Fermentation: Capillary Water Supply by Water-Retention Materials and Negative-Pressure Auto-controlled Irrigation. Front Bioeng Biotechnol 2019; 7:263. [PMID: 31681743 PMCID: PMC6812397 DOI: 10.3389/fbioe.2019.00263] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 07/20/2019] [Accepted: 09/26/2019] [Indexed: 11/13/2022] Open
Abstract
Solid-state fermentation (SSF) has regained interest owing to its advantages in solid waste treatment and fermentation industries. However, heterogeneous heat and mass transfer are often caused by the absence of free water and noticeable water loss from microbial utilization and moisture evaporation in SSF. It is necessary to explore more effective ways to solve issues of water loss and water supplement in SSF based on online capillary water monitoring, because capillary water is the dominant form of water that is present and lost in substrate. Two novel capillary-water supply strategies were proposed, established and evaluated using three selected reference strains, including water-retention materials and negative-pressure auto-controlled irrigation (NPACI). This study employed superabsorbent polymer, a kind of water-retention material to enhance enzyme productivity with the most significant increase of 2.47 times. Moreover, the combination of NPACI and 0.1% superabsorbent polymers increased productivity by 2.80-fold, together with lowered gradients of temperature, moisture and products. Furthermore, a modified liquid-supply SSF was constructed through successful capillary water control by proposed humidity control strategies. This modified SSF system could address the shortcomings of inhomogeneous culture of traditional SSF.
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Affiliation(s)
- Qin He
- Department of Microbiology, Key Lab of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
- Imperial College Centre for Synthetic Biology and Department of Bioengineering, Imperial College London, London, United Kingdom
| | - Huadong Peng
- Imperial College Centre for Synthetic Biology and Department of Bioengineering, Imperial College London, London, United Kingdom
| | - Mengyao Sheng
- Department of Microbiology, Key Lab of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Shishan Hu
- Department of Microbiology, Key Lab of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jiguo Qiu
- Department of Microbiology, Key Lab of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jiayu Gu
- Nantong Lianhai Weijing Biology Co., Ltd., Haimen, China
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14
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Sheng M, Xu J, Yang Z, Zhu J, Qian M, He Q, He J. Chitiniphilus eburneus sp. nov., a novel chitinolytic bacterium isolated from sludge. Int J Syst Evol Microbiol 2019; 70:352-357. [PMID: 31617842 DOI: 10.1099/ijsem.0.003762] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel Gram-stain-negative, curved rod-shaped, motile and non-endospore-forming strain, designated HX-2-15T, was isolated from activated sludge of agricultural chemical plant in Nanjing, Jiangsu province, PR China (32° 03' N, 118° 46' E) . Growth was observed at 15-37 °C (optimum between 25 and 30 °C), at pH 6.0-8.0 (optimum at pH 7.0) and with 0-3.0 % (w/v) NaCl (optimum at 0.5 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that the strain showed closest affiliation to Chitiniphilus shinanonensis SAY3T, with a sequence similarity of 99.0 %. The predominant cellular fatty acids were C16:0, C17:0 cyclo and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c). The major quinone was ubiquinone Q-8 . The polar lipid profile was composed of phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, three unidentified phospholipids, one unidentified lipid and one unidentified aminophosphoglycolipid . The genomic DNA G+C content of the strain was 63.6 mol%. The ANI and dDDH values obtained between the genomes of HX-2-15T and C. shinanonensis SAY3T were 85.3 and 29.3 % respectively. On the basis of data from phenotypic, chemotaxonomic and genotypic analysis, strain HX-2-15T represents a novel species of the genus Chitiniphilus, for which the name Chitiniphilus eburneus sp. nov. is proposed. The type strain is HX-2-15T (=KCTC 72286T=CCTCC AB 2019178T).
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Affiliation(s)
- Mengyao Sheng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, PR China
| | - Jianyi Xu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, PR China
| | - Zhou Yang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, PR China
| | - Jianchun Zhu
- Laboratory Centre of Life Science, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China.,Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, PR China
| | - Meng Qian
- Laboratory Centre of Life Science, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Qin He
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, PR China
| | - Jian He
- Laboratory Centre of Life Science, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China.,Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, PR China
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15
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Sheng M, Mantell M, Vance A, Shamimi-Noori S, Nadolski G, Reddy S, Stavropoulos S, Hunt S, Dagli M, Sudheendra D, Clark T. 03:09 PM Abstract No. 354 Treatment of non-maturing fistula for hemodialysis access via transradial approach: a case-control study. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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16
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Liu B, Peng Q, Sheng M, Hu S, Qian M, Fan B, He J. Directed Evolution of Sulfonylurea Esterase and Characterization of a Variant with Improved Activity. J Agric Food Chem 2019; 67:836-843. [PMID: 30585487 DOI: 10.1021/acs.jafc.8b06198] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Esterase SulE detoxicates a variety of sulfonylurea herbicides through de-esterification. SulE exhibits high activity against thifensulfuron-methyl but low activity against other sulfonylureas. In this study, two variants, m2311 (P80R) and m0569 (P80R and G176A), with improved activity were screened from a mutation library constructed by error-prone PCR. Variant m2311 showed a higher activity against sulfonylureas in comparison variant m0569 and was further investigated. The kcat/ Km value of variant m2311 for metsulfuron-methyl, sulfometuron-methyl, chlorimuron-ethyl, tribenuron-methyl, and ethametsulfuron-methyl increased by 3.20-, 1.72-, 2.94-, 2.26- and 2.96-fold, respectively, in comparison with the wild type. Molecular modeling suggested that the activity improvement of variant m2311 is due to the substitution of Pro80 by arginine, leading to the formation of new hydrogen bonds between the enzyme and substrate. This study facilitates further elucidation of the structure and function of SulE and provides an improved gene resource for the detoxification of sulfonylurea residues and the genetic engineering of sulfonylurea-resistant crops.
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Affiliation(s)
- Bin Liu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , People's Republic of China
| | - Qian Peng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , People's Republic of China
| | - Mengyao Sheng
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , People's Republic of China
| | - Shishan Hu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , People's Republic of China
| | - Meng Qian
- Laboratory Centre of Life Science, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , People's Republic of China
| | - Ben Fan
- College of Forest Resources and Environment , Nanjing Forestry University , Nanjing , Jiangsu , People's Republic of China
| | - Jian He
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences , Nanjing Agricultural University , Nanjing 210095 , Jiangsu , People's Republic of China
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17
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Zhang P, He F, Bai J, Yamamoto S, Chen S, Zhang L, Sheng M, Zhang L, Guo Y, Man N, Yang H, Wang S, Cheng T, Nimer SD, Zhou Y, Xu M, Wang QF, Yang FC. Chromatin regulator Asxl1 loss and Nf1 haploinsufficiency cooperate to accelerate myeloid malignancy. J Clin Invest 2018; 128:5383-5398. [PMID: 30226831 DOI: 10.1172/jci121366] [Citation(s) in RCA: 21] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 09/11/2018] [Indexed: 12/30/2022] Open
Abstract
ASXL1 is frequently mutated in myeloid malignancies and is known to co-occur with other gene mutations. However, the molecular mechanisms underlying the leukemogenesis associated with ASXL1 and cooperating mutations remain to be elucidated. Here, we report that Asxl1 loss cooperated with haploinsufficiency of Nf1, a negative regulator of the RAS signaling pathway, to accelerate the development of myeloid leukemia in mice. Loss of Asxl1 and Nf1 in hematopoietic stem and progenitor cells resulted in a gain-of-function transcriptional activation of multiple pathways such as MYC, NRAS, and BRD4 that are critical for leukemogenesis. The hyperactive MYC and BRD9 transcription programs were correlated with elevated H3K4 trimethylation at the promoter regions of genes involving these pathways. Furthermore, pharmacological inhibition of both the MAPK pathway and BET bromodomain prevented leukemia initiation and inhibited disease progression in Asxl1Δ/Δ Nf1Δ/Δ mice. Concomitant mutations of ASXL1 and RAS pathway genes were associated with aggressive progression of myeloid malignancies in patients. This study sheds light on the effect of cooperation between epigenetic alterations and signaling pathways on accelerating the progression of myeloid malignancies and provides a rational therapeutic strategy for the treatment of myeloid malignancies with ASXL1 and RAS pathway gene mutations.
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Affiliation(s)
- Peng Zhang
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Fuhong He
- CAS Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Jie Bai
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital and Center for Stem Cell Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Department of Hematology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - Shohei Yamamoto
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Shi Chen
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Lin Zhang
- CAS Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Mengyao Sheng
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital and Center for Stem Cell Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Lei Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital and Center for Stem Cell Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Ying Guo
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Na Man
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Hui Yang
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Suyun Wang
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital and Center for Stem Cell Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Stephen D Nimer
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Yuan Zhou
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital and Center for Stem Cell Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Mingjiang Xu
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Qian-Fei Wang
- CAS Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Feng-Chun Yang
- Sylvester Comprehensive Cancer Center, Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
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18
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Li Y, Zhang M, Sheng M, Zhang P, Chen Z, Xing W, Bai J, Cheng T, Yang FC, Zhou Y. Therapeutic potential of GSK-J4, a histone demethylase KDM6B/JMJD3 inhibitor, for acute myeloid leukemia. J Cancer Res Clin Oncol 2018; 144:1065-1077. [PMID: 29594337 PMCID: PMC5948279 DOI: 10.1007/s00432-018-2631-7] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [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: 01/30/2018] [Accepted: 03/23/2018] [Indexed: 12/22/2022]
Abstract
PURPOSE Acute myeloid leukemia (AML) is a heterogeneous disease with poor outcomes. Despite increased evidence shows that dysregulation of histone modification contributes to AML, specific drugs targeting key histone modulators are not applied in the clinical treatment of AML. Here, we investigated whether targeting KDM6B, the demethylase of tri-methylated histone H3 lysine 27 (H3K27me3), has a therapeutic potential for AML. METHODS A KDM6B-specific inhibitor, GSK-J4, was applied to treat the primary cells from AML patients and AML cell lines in vitro and in vivo. RNA-sequencing was performed to reveal the underlying mechanisms of inhibiting KDM6B for the treatment of AML. RESULTS Here we observed that the mRNA expression of KDM6B was up-regulated in AML and positively correlated with poor survival. Treatment with GSK-J4 increased the global level of H3K27me3 and reduced the proliferation and colony-forming ability of primary AML cells and AML cell lines. GSK-J4 treatment significantly induced cell apoptosis and cell-cycle arrest in Kasumi-1 cells, and displayed a synergistic effect with cytosine arabinoside. Notably, injection of GSK-J4 attenuated the disease progression in a human AML xenograft mouse model in vivo. Treatment with GSK-J4 predominantly resulted in down-regulation of DNA replication and cell-cycle-related pathways, as well as abrogated the expression of critical cancer-promoting HOX genes. ChIP-qPCR validated an increased enrichment of H3K27me3 in the transcription start sites of these HOX genes. CONCLUSIONS In summary, our findings suggest that targeting KDM6B with GSK-J4 has a therapeutic potential for the treatment of AML.
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Affiliation(s)
- Yunan Li
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Mingying Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Mengyao Sheng
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Peng Zhang
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, USA.,Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, USA
| | - Zizhen Chen
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Wen Xing
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Tianjin, China.,Department of Stem Cell and Regenerative Medicine, Peking Union Medical College, Tianjin, China
| | - Jie Bai
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Tianjin, China.,Department of Stem Cell and Regenerative Medicine, Peking Union Medical College, Tianjin, China.,Collaborative Innovation Center for Cancer Medicine, Tianjin, China
| | - Feng-Chun Yang
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, USA. .,Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, USA.
| | - Yuan Zhou
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China. .,Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Tianjin, China. .,Department of Stem Cell and Regenerative Medicine, Peking Union Medical College, Tianjin, China.
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Silk M, Sheng M, Noji M, Pulido S, Hunt S, Nadolski G, Soulen M, Gade T. Exploiting the epigenetic alterations in HCC to enhance TACE: the role of fructose-1,6-bisphosphatase 1 (FBP1) and inhibition of hypoxia inducible factor (HIF). J Vasc Interv Radiol 2017. [DOI: 10.1016/j.jvir.2016.12.727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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20
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Bai J, Shi H, Ai L, Zhang L, Zhou Y, Li Z, Zhao Y, Sheng M, Li D, Li H, Qian L, Mi Y, Xiao Z, Zheng Y, Yang R, Xue Y. [Survival and prognosis of patients with polycythemia vera: a study of 816 patients in a single Chinese center]. Zhonghua Yi Xue Za Zhi 2015; 95:1364-1368. [PMID: 26178350] [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: 06/04/2023]
Abstract
OBJECTIVE To explore the survival and the risk factors of poor prognosis in Chinese patients with polycythemia vera (PV). METHODS A total of 816 patients with a definite diagnosis of PV were enrolled from August 1983 to June 2013 into this study. The standardized mortality ratio (SMR) was calculated by comparing the cumulative survival of 816 PV patients with age- and sex- and calendar year-matched healthy Chinese population from the national bureau of statistics of the People's Republic of China. The clinical features of diagnosis and prognosis of PV patients were analyzed by Cox regression to identify risk factors for the poor prognosis of PV and to develop a dynamic prognostic model in Chinese patients. The effects of different treatments on the development of acute myelocytic leukemia (AML) and post-PV myelofibrosis (post-PV MF) were determined by Kaplan-Meier analysis. JAK2 V617F allele burden (V617F%) was determined by quantitative real-time PCR in 104 patients. RESULTS The median follow-up time was 6 (1-42) years. The 10-, 15- and 20-year overall survival (OS) was 89.50%, 76.70% and 64.70%, respectively. The SMR was 17.40 (95% CI: 13.71-21.78). Cox regression analysis revealed that white blood cell (WBC) count>10×10(9)/L (HR=3.10, 95% CI: 1.47-6.53, P=0.003), age>60 years (HR=2.89, 95% CI: 1.84-4.53, P<0.001) and prior thrombosis (HR=2.66, 95% CI: 1.65-4.29, P<0.001) were significant predictors for the poor prognosis of PV. Based on the hazard radio, 816 patents were allocated into 4 categories with significantly different survival: low (sum of points=0; median survival no reached), intermediate 1 (sum of points=1; median survival 33.10 (28.20-38.00) years), intermediate 2 (sum of points=2; median survival 23.00 (16.08-29.92) years), high (sum of points=3; median survival 13.00 (10.58-15.42) years). The mortality of high risk group was 5.37 fold higher than low risk patients. The 10- and 20-year survival of no post-PV MF were 89.50% and 79.60%, respectively, for interferon α (IFN-α); 73.80% and 43.50%, respectively, for hydroxyurea treatment; 82.20% and 71.40%, respectively, for alkylating agent treatment; and 80.00% and 38.20%, respectively, for no cytoreductive treatment. The treatment of exposure to IFN-α associated with a higher rate of no-post-PV MF survival (Log-rank=9.79, P=0.020). There were more post-PV MF patients with V617F%≥50% compared with those V617F%<50% (P<0.001). CONCLUSIONS The mortality of PV patients is significantly higher than that of healthy Chinese population. The WBC count>10×10(9)/L, age>60 years, and prior thrombosis are identified as significant predictors for the prognosis of PV. The risk of post-PV MF transformation may be ameliorated by IFN-α via decreasing the burden of JAK2 V617F mutation.
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Affiliation(s)
- Jie Bai
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Tianjin 300020, China
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21
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Carlén M, Meletis K, Siegle JH, Cardin JA, Futai K, Vierling-Claassen D, Rühlmann C, Jones SR, Deisseroth K, Sheng M, Moore CI, Tsai LH. A critical role for NMDA receptors in parvalbumin interneurons for gamma rhythm induction and behavior. Mol Psychiatry 2012; 17:537-48. [PMID: 21468034 PMCID: PMC3335079 DOI: 10.1038/mp.2011.31] [Citation(s) in RCA: 450] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Synchronous recruitment of fast-spiking (FS) parvalbumin (PV) interneurons generates gamma oscillations, rhythms that emerge during performance of cognitive tasks. Administration of N-methyl-D-aspartate (NMDA) receptor antagonists alters gamma rhythms, and can induce cognitive as well as psychosis-like symptoms in humans. The disruption of NMDA receptor (NMDAR) signaling specifically in FS PV interneurons is therefore hypothesized to give rise to neural network dysfunction that could underlie these symptoms. To address the connection between NMDAR activity, FS PV interneurons, gamma oscillations and behavior, we generated mice lacking NMDAR neurotransmission only in PV cells (PV-Cre/NR1f/f mice). Here, we show that mutant mice exhibit enhanced baseline cortical gamma rhythms, impaired gamma rhythm induction after optogenetic drive of PV interneurons and reduced sensitivity to the effects of NMDAR antagonists on gamma oscillations and stereotypies. Mutant mice show largely normal behaviors except for selective cognitive impairments, including deficits in habituation, working memory and associative learning. Our results provide evidence for the critical role of NMDAR in PV interneurons for expression of normal gamma rhythms and specific cognitive behaviors.
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Affiliation(s)
- M Carlén
- Department of Brain and Cognitive Sciences, Picower Institute for Learning and Memory, MIT, Cambridge, MA 02139, USA.
| | - K Meletis
- Department of Brain and Cognitive Sciences, Picower Institute for Learning and Memory, MIT, Cambridge, MA, USA,Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - J H Siegle
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, MIT, Cambridge, MA, USA
| | - J A Cardin
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, MIT, Cambridge, MA, USA,Department of Neuroscience, University of Pennsylvania, Philadelphia, PA, USA
| | - K Futai
- Department of Brain and Cognitive Sciences, Picower Institute for Learning and Memory, MIT, Cambridge, MA, USA
| | - D Vierling-Claassen
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, MIT, Cambridge, MA, USA,Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - C Rühlmann
- Department of Brain and Cognitive Sciences, Picower Institute for Learning and Memory, MIT, Cambridge, MA, USA
| | - S R Jones
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - K Deisseroth
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - M Sheng
- Department of Brain and Cognitive Sciences, Picower Institute for Learning and Memory, MIT, Cambridge, MA, USA
| | - C I Moore
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, MIT, Cambridge, MA, USA,McGovern Institute for Brain Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. E-mail:
| | - L-H Tsai
- Department of Brain and Cognitive Sciences, Picower Institute for Learning and Memory, MIT, Cambridge, MA, USA,Stanley Center for Psychiatric Research, Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA, USA,Howard Hughes Medical Institute, Cambridge, MA, USA,Picower Institute for Leaning and Memory, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. E-mail:
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Guo W, Wang J, Sheng M, Zhou M, Fang L. Radiological findings in 210 paediatric patients with viral pneumonia: a retrospective case study. Br J Radiol 2012; 85:1385-9. [PMID: 22514104 DOI: 10.1259/bjr/20276974] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVE The objective of this study was to assess the radiological presentations of different types of viral pneumonia in children. METHODS Nasopharyngeal swab specimens and bronchial aspirate samples from children with acute respiratory infections were obtained and tested for influenza B, adenovirus, respiratory syncytial virus and parainfluenza (Types 1, 2 and 3) by direct immunofluorescence assay, or for influenza A (Subtype H1N1) by quantitative real-time polymerase chain reaction. The chest radiographs of the 210 confirmed cases of viral pneumonia were analysed retrospectively by two independent radiologists for the identification, characterisation and description of the distribution of imaging abnormalities. The cases were divided into six groups on the basis of confirmed causative viral agent, and radiographic findings were compared, analysed and presented. RESULTS The abnormal chest radiograph findings consisted of bilateral patchy areas of consolidation (n=133), interstitial lung disease (n=33), diffuse areas of air space consolidation (n=29) and lobar consolidation (n=15). The abnormalities were distributed bilaterally in 195 cases and observed more frequently in the lower zones than in other regions. The radiological findings varied significantly among the six groups (p=0.0050). Pairwise comparison showed significant difference between influenza A (H1N1) and adenovirus (p=0.0031) only. CONCLUSION The predominant radiological finding in paediatric viral pneumonia was bilateral patchy areas of consolidation. The radiological findings differed significantly only between adenovirus and influenza A pneumonia. The diagnosis of the specific causative organism requires laboratory confirmation.
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Affiliation(s)
- W Guo
- Radiology Department, The Children's Hospital Affiliated to Soochow University, Suzhou, China
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Ramayya MS, Sheng M, Moroz K, Hill SM, Rowan BG. Human steroidogenic factor-1 (hSF-1) regulates progesterone biosynthesis and growth of ovarian surface epithelial cancer cells. J Steroid Biochem Mol Biol 2010; 119:14-25. [PMID: 20045459 DOI: 10.1016/j.jsbmb.2009.11.006] [Citation(s) in RCA: 9] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 11/09/2009] [Accepted: 11/12/2009] [Indexed: 11/21/2022]
Abstract
The majority of cancers derived from ovarian surface epithelial (OSE) cells are lethal. Estrogens promote proliferation of OSE cells, whereas progesterone inhibits proliferation and promotes apoptosis of OSE cells. Human steroidogenic factor-1 (hSF-1) induction of the steroidogenic acute regulatory protein (StAR) gene, and the steroidogenic enzymes CYP11A1 and HSD3B2 is central to progesterone biosynthesis. Whereas hSF-1 and StAR are expressed in human ovarian surface epithelial (HOSE) cells, hSF-1 and StAR protein were not expressed in a panel of malignant ovarian cancer cell lines (SKOV-3, BG-1, and Caov-3), and in human OSE cells immortalized by SV40 large T antigen (IOSE-121). Transient expression of hSF-1 in SKOV-3 cells activated the expression of StAR, p450scc and 3betaHSD-II mRNAs, and induced progesterone biosynthesis. Additionally, hSF-1 suppressed proliferation and promoted apoptosis of SKOV-3 cells and suppressed SKOV-3 cell growth induced by ERalpha and estradiol. These findings suggest that hSF-1 is central to progesterone biosynthesis in OSE cells. Human SF-1 may decrease OSE cancer cell numbers directly by apoptosis, and indirectly by opposing estradiol-induced proliferation. These findings are consistent with the hypothesis, that down-regulation of hSF-1 contributes to progression of ovarian epithelial cancers.
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Affiliation(s)
- M S Ramayya
- Section of Pediatric Endocrinology, Department of Pediatrics, Tulane University School of Medicine, New Orleans, LA 70112, USA.
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24
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Jo J, Heon S, Kim M, Son G, Park Y, Henley J, Weiss J, Sheng M, Collingridge G, Cho K. Metabotropic Glutamate Receptor-mediated LTD Involves two Interacting Ca 2+ Sensors, NCS-1 and PICK1. Eur Psychiatry 2009. [DOI: 10.1016/s0924-9338(09)70317-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
There are two major forms of long-term depression (LTD) of synaptic transmission in the central nervous system, which require activation of either N-methyl-D-aspartate receptors (NMDARs) or metabotropic glutamate receptors (mGluRs). In synapses in the perirhinal cortex we have directly compared the Ca2+ signalling mechanisms involved in NMDAR-LTD and mGluR-LTD. Whilst both forms of LTD involve Ca2+ release from intracellular stores the Ca2+ sensors involved are different; NMDAR-LTD involves calmodulin, whilst mGluR-LTD involves the neuronal Ca2+ sensor (NCS) protein NCS-1. In addition, there is a specific requirement for IP3 and PKC as well as protein interacting with C-kinase (PICK-1) in mGluR-LTD. NCS-1 binds directly to PICK1, via its BAR domain, in a Ca2+-dependent manner. Furthermore, the NCS-1-PICK1 association is stimulated by activation of mGluRs, but not NMDARs, and introduction of a PICK1 BAR domain fusion protein specifically blocks mGluR-LTD. Thus, NCS-1 is a component of a novel mechanism involved in mGluR-LTD.
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25
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Affiliation(s)
- H Hering
- Center for Learning and Memory, RIKEN-MIT Center for Neuroscience Research, Department of Brain and Cognitive Sciences, and Howard Hughes Medical Institute, 77 Massachusetts Avenue (E18-215), Cambridge, Massachusetts 02139, USA
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Lee SH, Valtschanoff JG, Kharazia VN, Weinberg R, Sheng M. Biochemical and morphological characterization of an intracellular membrane compartment containing AMPA receptors. Neuropharmacology 2001; 41:680-92. [PMID: 11640922 DOI: 10.1016/s0028-3908(01)00124-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [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: 11/16/2022]
Abstract
AMPA receptors cycle rapidly in and out of the postsynaptic membrane, while NMDA receptors are relatively immobile. Changing the distribution of AMPA receptors between intracellular and surface synaptic pools is an important means of controlling synaptic strength. However, little is known about the intracellular membrane compartments of neurons that contain AMPA receptors. Here we describe biochemical and morphological characteristics of an intracellular pool of AMPA receptors in rat brain. By velocity gradient centrifugation of microsomal light membranes from rat brain, we identified a membrane fraction enriched for AMPA receptor subunits GluR2/3 but lacking NMDA receptors. This membrane compartment sedimented more slowly than synaptosomes but faster than synaptic vesicles and cofractionated with GRIP, PICK-1 and syntaxin-13. Morphological examination of this fraction revealed round and tubular vesicles ranging from approximately 50 to 300 nm in diameter. Immunocytochemistry of cultured hippocampal neurons showed that a significant portion of AMPA receptors colocalized with syntaxin-13 (a SNARE protein associated with tubulovesicular recycling endosomes) and with transferrin receptors. Taken together, these results suggest that a pool of intracellular GluR2/3 resides in a syntaxin 13-positive tubulovesicular membrane compartment, which might serve as a reservoir for the dendritic recycling of AMPA receptors.
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MESH Headings
- Animals
- Cells, Cultured
- Centrifugation, Density Gradient
- Cerebral Cortex/chemistry
- Cerebral Cortex/metabolism
- Cerebral Cortex/ultrastructure
- Endosomes/metabolism
- Glycerol
- Hippocampus/chemistry
- Hippocampus/cytology
- Hippocampus/metabolism
- Intracellular Membranes/chemistry
- Intracellular Membranes/metabolism
- Intracellular Membranes/ultrastructure
- Male
- Membrane Proteins/metabolism
- Microscopy, Immunoelectron
- Neurons/chemistry
- Neurons/metabolism
- Prosencephalon/chemistry
- Prosencephalon/metabolism
- Prosencephalon/ultrastructure
- Qa-SNARE Proteins
- Rats
- Rats, Sprague-Dawley
- Receptors, AMPA/chemistry
- Receptors, AMPA/metabolism
- Receptors, AMPA/ultrastructure
- Receptors, Glutamate/chemistry
- Receptors, Glutamate/metabolism
- Receptors, Glutamate/ultrastructure
- Receptors, N-Methyl-D-Aspartate/chemistry
- Receptors, N-Methyl-D-Aspartate/metabolism
- Receptors, N-Methyl-D-Aspartate/ultrastructure
- Subcellular Fractions/chemistry
- Subcellular Fractions/metabolism
- Subcellular Fractions/ultrastructure
- Synaptic Vesicles/chemistry
- Synaptic Vesicles/metabolism
- Synaptic Vesicles/ultrastructure
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Affiliation(s)
- S H Lee
- Department of Neurobiology and Howard Hughes Medical Institute, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
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Fan Y, Wu D, Gong Y, Hu Z, Sheng M. [Effect of radix angelicae sinensis decoction for supplementing blood on inhibiting the increase of endothelial cell monolayer permeability induced by hypoosmotic solution]. Zhong Yao Cai 2001; 24:806-8. [PMID: 15575163] [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: 05/01/2023]
Abstract
OBJECTIVE To study effect of radix Angelicae sinensis decoction for supplementing blood (RASDSB) on inhibiting the increase of endothelial cell monolayer permeability induced by hypoosmotic solution. METHODS The endothelial cells isolated from newborn bovine aorta were cultured on polycarbonate microporous filter membrane to develop compact endothelial monolayer. Fluid filtration coefficient (Kf), filtration volume (Jv) and osmotic reflective coefficient (sigma) to protein of the endothelial monolayer were measured treated by hypoosmotic solution (changing concentration of serum in M199 solution from 20% to 2%) for 120 min or by hypoosmotic solution containing 10(-4) g x ml(-1) RASDSB for 120 min after perfused Hanks balanced salt solution containing 5 g x L(-1) albumin. RESULTS Kf and Jv of the endothelial monolayer treated by hypoosmotic solution increased and sigma of that decreased. RASDSB could inhibit above-mentioned change. Morphological analysis demonstrated that RASDSB could inhibit widening of intercellular distance and enlargement of cellular area in the endothelial monolayer induced by hypoosmolality. CONCLUSION Hypoosmotic solution could increase endothelial cell monolayer permeability and RASDSB could inhibit the increase.
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Affiliation(s)
- Y Fan
- Institute of Radiological Medicine, Shanghai Medical University, Shanghai 200032
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Abstract
PDZ domains are modular protein interaction domains that bind in a sequence-specific fashion to short C-terminal peptides or internal peptides that fold in a beta-finger. The diversity of PDZ binding specificities can be explained by variable amino acids lining the peptide-binding groove of the PDZ domain. Abundantly represented in Caenorhabditis elegans, Drosophila melanogaster, and mammalian genomes, PDZ domains are frequently found in multiple copies or are associated with other protein-binding motifs in multidomain scaffold proteins. PDZ-containing proteins are typically involved in the assembly of supramolecular complexes that perform localized signaling functions at particular subcellular locations. Organization around a PDZ-based scaffold allows the stable localization of interacting proteins and enhances the rate and fidelity of signal transduction within the complex. Some PDZ-containing proteins are more dynamically regulated in distribution and may also be involved in the trafficking of interacting proteins within the cell.
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Affiliation(s)
- M Sheng
- Howard Hughes Medical Institute and Department of Neurobiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA.
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Abstract
Using a thrombin cleavage assay in cultured hippocampal neurons, we studied the kinetics, regulation and site of AMPA receptor surface delivery. Surface insertion of the GluR1 subunit occurs slowly in basal conditions and is stimulated by NMDA receptor activation and insulin, whereas GluR2 exocytosis is constitutively rapid. Although both subunits ultimately concentrate in synapses, GluR1 and GluR2 show different spatial patterns of surface accumulation, consistent with GluR1 being inserted initially at extrasynaptic sites and GluR2 being inserted more directly at synapses. The spatiotemporal pattern of surface accumulation is determined by the cytoplasmic tails of GluR subunits, and in heteromeric receptors, GluR1 acts dominantly over GluR2. We propose that GluR1 controls the exocytosis and GluR2/3, the recycling and endocytosis of AMPA receptors.
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Affiliation(s)
- M Passafaro
- Department of Neurobiology and Howard Hughes Medical Institute, Massachusetts General Hospital and Harvard Medical School, 50 Blossom Street, Boston, Massachusetts 02114, USA
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Abstract
The PSD-95/SAP90 family of scaffold proteins organizes the postsynaptic density (PSD) and regulates NMDA receptor signaling at excitatory synapses. We report that SPAR, a Rap-specific GTPase-activating protein (RapGAP), interacts with the guanylate kinase-like domain of PSD-95 and forms a complex with PSD-95 and NMDA receptors in brain. In heterologous cells, SPAR reorganizes the actin cytoskeleton and recruits PSD-95 to F-actin. In hippocampal neurons, SPAR localizes to dendritic spines and causes enlargement of spine heads, many of which adopt an irregular appearance with putative multiple synapses. Dominant negative SPAR constructs cause narrowing and elongation of spines. The effects of SPAR on spine morphology depend on the RapGAP and actin-interacting domains, implicating Rap signaling in the regulation of postsynaptic structure.
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Affiliation(s)
- D T Pak
- Department of Neurobiology, Howard Hughes Medical Institute, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
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Abstract
The Shank family of proteins interacts with NMDA receptor and metabotropic glutamate receptor complexes in the postsynaptic density (PSD). Targeted to the PSD by a PDZ-dependent mechanism, Shank promotes the maturation of dendritic spines and the enlargement of spine heads via its ability to recruit Homer to postsynaptic sites. Shank and Homer cooperate to induce accumulation of IP3 receptors in dendritic spines and formation of putative multisynapse spines. In addition, postsynaptic expression of Shank enhances presynaptic function, as measured by increased minifrequency and FM4-64 uptake. These data suggest a central role for the Shank scaffold in the structural and functional organization of the dendritic spine and synaptic junction.
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Affiliation(s)
- C Sala
- Howard Hughes Medical Institute and, Department of Neurobiology, Massachusetts General Hospital and, Harvard Medical School, 02114, Boston, MA, USA
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Lou J, Marzari R, Verzillo V, Ferrero F, Pak D, Sheng M, Yang C, Sblattero D, Bradbury A. Antibodies in haystacks: how selection strategy influences the outcome of selection from molecular diversity libraries. J Immunol Methods 2001; 253:233-42. [PMID: 11384684 DOI: 10.1016/s0022-1759(01)00385-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [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: 10/24/2022]
Abstract
Antibodies against most antigens can be isolated from high quality phage antibody libraries. However, not all antibodies binding a particular antigen are necessarily found when standard selections are performed. Here we investigate the effect of two different selection strategies on the isolation of antibodies against a number of different antigens, and find that these different strategies tend to select different antibodies, with little overlap between them. This indicates that the full diversity of these libraries is not tapped by a single selection strategy and that each selection strategy imposes different selective criteria in addition to that of antigen binding. To fully exploit such libraries, therefore, many different selection strategies should probably be employed for each antigen. The use of alternative strategies should be considered when selection apparently fails, or when the number of different antibodies recognizing an antigen needs to be maximised. Furthermore, the microtitre selection strategy developed is likely to prove useful in the application of phage antibody libraries to the human genome project, allowing the high throughput selection of antibodies against multiple antigens simultaneously.
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Affiliation(s)
- J Lou
- Department of Anesthesia 3s50, San Francisco General Hospital, UCSF, San Francisco, CA, USA
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33
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Affiliation(s)
- M Sheng
- Department of Neurobiology and Howard Hughes Medical Institute, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
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Abstract
A specific set of molecules including glutamate receptors is targeted to the postsynaptic specialization of excitatory synapses in the brain, gathering in a structure known as the postsynaptic density (PSD). Synaptic targeting of glutamate receptors depends on interactions between the C-terminal tails of receptor subunits and specific PDZ domain-containing scaffold proteins in the PSD. These scaffold proteins assemble a specialized protein complex around each class of glutamate receptor that functions in signal transduction, cytoskeletal anchoring, and trafficking of the receptors. Among the glutamate receptor subtypes, the N-methyl-d-aspartate receptor is relatively stably integrated in the PSD, whereas the alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor moves in and out of the postsynaptic membrane in highly dynamic fashion. The distinctive cell biological behaviors of N-methyl-d-aspartate and alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors can be explained by their differential interactions with cytoplasmic proteins.
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Affiliation(s)
- M Sheng
- Department of Neurobiology, and Howard Hughes Medical Institute, Massachusetts General Hospital and Harvard Medical School, 50 Blossom Street (Wel 423), Boston, MA 02114, USA.
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35
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Hsueh YP, Roberts AM, Volta M, Sheng M, Roberts RG. Bipartite interaction between neurofibromatosis type I protein (neurofibromin) and syndecan transmembrane heparan sulfate proteoglycans. J Neurosci 2001; 21:3764-70. [PMID: 11356864 PMCID: PMC6762697] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023] Open
Abstract
The neurofibromatosis type 1 (NF1) gene encodes a large tumor suppressor protein (neurofibromin). Although it is known to possess Ras GTPase-activating protein (GAP) activity, the cellular role of neurofibromin remains unclear. Here we used yeast two-hybrid screening to identify neurofibromin-interacting proteins. Syndecan-2, a transmembrane heparan sulfate proteoglycan (HSPG), was isolated as a binding partner for two distinct regions of the neurofibromin protein. We subsequently found that neurofibromin can bind all four mammalian syndecans. NF1 interaction requires the transmembrane domain and a membrane-proximal region of the cytoplasmic tail of syndecan, but not the C terminus of syndecan known to bind to CASK, a membrane-associated guanylate kinase (MAGUK). Neurofibromin, syndecans, and CASK have overlapping subcellular distributions in axons and synapses of neurons, as shown by biochemical fractionation and immunostaining. Moreover, neurofibromin exists in a complex with syndecan and CASK in vivo, as evidenced by their coimmunoprecipitation from rat brain. Our findings suggest that interaction with different members of the syndecan family may be a mechanism for localizing neurofibromin to specialized domains of the plasma membrane.
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Affiliation(s)
- Y P Hsueh
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan, 115, Republic of China.
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36
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Abstract
Activation of the calcium-dependent protease calpain has been proposed to be a key step in synaptic plasticity in the hippocampus. However, the exact pathway through which calpain mediates or modulates changes in synaptic function remains to be clarified. Here we report that glutamate receptor-interacting protein (GRIP) is a substrate of calpain, as calpain-mediated GRIP degradation was demonstrated using three different approaches: (i) purified calpain I digestion of synaptic membranes, (ii) calcium treatment of frozen-thawed brain sections, and (iii) NMDA-stimulated organotypic hippocampal slice cultures. More importantly, calpain activation resulted in the disruption of GRIP binding to the GluR2 subunit of alpha-amino-3-hydroxy-5-methylisoxazole-4-propionate (AMPA) receptors. Because GRIP has been proposed to function as an AMPA receptor-targeting and synaptic-stabilizing protein, as well as a synaptic-organizing molecule, calpain-mediated degradation of GRIP and disruption of AMPA receptor anchoring are likely to play important roles in the structural and functional reorganization accompanying synaptic modifications in long-term potentiation and long-term depression.
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Affiliation(s)
- X Lu
- Neuroscience Program, University of Southern California, Los Angeles 90089-2520, USA
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37
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Abstract
Cytoplasmic dynein is a large, multisubunit molecular motor that translocates cargoes toward the minus ends of microtubules. Proper functioning of the dynein motor requires precise assembly of its various subunits. Using purified recombinant proteins, we show that the highly conserved 8-kDa light chain (DLC8) binds to the intermediate chain of the dynein complex. The DLC8-binding region was mapped to a highly conserved 10-residue fragment (amino acid sequence SYSKETQTPL) C-terminal to the second alternative splicing site of dynein intermediate chain. Yeast two-hybrid screening using DLC8 as bait identified numerous additional DLC8-binding proteins. Biochemical and mutational analysis of selected DLC8-binding proteins revealed that DLC8 binds to a consensus sequence containing a (K/R)XTQT motif. The (K/R)XTQT motif interacts with the common target-accepting grooves of DLC8 dimer. The role of each conserved amino acid residue in this pentapeptide motif in supporting complex formation with DLC8 was systematically studied using site-directed mutagenesis.
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Affiliation(s)
- K W Lo
- Department of Biochemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People's Republic of China
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38
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Hevner RF, Shi L, Justice N, Hsueh Y, Sheng M, Smiga S, Bulfone A, Goffinet AM, Campagnoni AT, Rubenstein JL. Tbr1 regulates differentiation of the preplate and layer 6. Neuron 2001; 29:353-66. [PMID: 11239428 DOI: 10.1016/s0896-6273(01)00211-2] [Citation(s) in RCA: 650] [Impact Index Per Article: 28.3] [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: 11/25/2022]
Abstract
During corticogenesis, early-born neurons of the preplate and layer 6 are important for guiding subsequent neuronal migrations and axonal projections. Tbr1 is a putative transcription factor that is highly expressed in glutamatergic early-born cortical neurons. In Tbr1-deficient mice, these early-born neurons had molecular and functional defects. Cajal-Retzius cells expressed decreased levels of Reelin, resulting in a reeler-like cortical migration disorder. Impaired subplate differentiation was associated with ectopic projection of thalamocortical fibers into the basal telencephalon. Layer 6 defects contributed to errors in the thalamocortical, corticothalamic, and callosal projections. These results show that Tbr1 is a common genetic determinant for the differentiation of early-born glutamatergic neocortical neurons and provide insights into the functions of these neurons as regulators of cortical development.
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Affiliation(s)
- R F Hevner
- Nina Ireland Laboratory of, Developmental Neurobiology, Department of Psychiatry, University of California, San Francisco, San Francisco, CA 94143, USA
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39
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Lim S, Sala C, Yoon J, Park S, Kuroda S, Sheng M, Kim E. Sharpin, a novel postsynaptic density protein that directly interacts with the shank family of proteins. Mol Cell Neurosci 2001; 17:385-97. [PMID: 11178875 DOI: 10.1006/mcne.2000.0940] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.3] [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: 11/22/2022] Open
Abstract
The Shank family of proteins (also termed CortBP, ProSAP, or Synamon) is highly enriched in the postsynaptic density (PSD) of excitatory synapses in brain. Shank contains multiple domains for protein-protein interactions, including ankyrin repeats, SH3 domain, PDZ domain, SAM domain, and an extensive proline-rich region. We have identified a novel protein, termed Sharpin, that directly interacts with the ankyrin repeats of Shank. Sharpin is enriched in the PSD and forms a complex with Shank in heterologous cells and brain. Immunostaining reveals the presence of Sharpin at excitatory synapses and its colocalization with Shank. While the C-terminal half of Sharpin interacts with Shank, the N-terminal half of Sharpin mediates homomultimerization. Considering the fact that the ankyrin repeats and the SH3 domain of Shank can be truncated by alternative splicing, these results define Sharpin as a novel PSD protein that may regulate the complexity of the Shank-based protein network in an alternative splicing-dependent manner.
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Affiliation(s)
- S Lim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yusong-ku, Daejon, 305-701, Korea
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40
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Burette A, Khatri L, Wyszynski M, Sheng M, Ziff EB, Weinberg RJ. Differential cellular and subcellular localization of ampa receptor-binding protein and glutamate receptor-interacting protein. J Neurosci 2001; 21:495-503. [PMID: 11160429 PMCID: PMC6763792] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Excitatory synaptic currents in the mammalian brain are typically mediated by the neurotransmitter glutamate, acting at AMPA receptors. We used immunocytochemistry to investigate the distribution of AMPA receptor-binding protein (ABP) in the cerebral neocortex. ABP was most prominent in pyramidal neurons, although it was also present (at lower levels) in interneurons. ABP and its putative binding partners, the GluR2/3 subunits of the AMPA receptor, exhibited prominent cellular colocalization. Under appropriate processing conditions, colocalization could also be documented in puncta, many of which could be recognized as dendritic spines. However, a sizable minority of GluR2/3-positive puncta were immunonegative for ABP. Because glutamate receptor-interacting protein (GRIP) may also anchor GluR2, we studied the relative distribution of ABP and GRIP. There was extensive colocalization of these two antigens at the cellular level, although GRIP, unlike ABP, was strongest in nonpyramidal neurons. Different parts of a single dendrite could stain selectively for ABP or GRIP. To further characterize this heterogeneity, we investigated punctate staining of neuropil using synaptophysin and the membrane tracer DiA to identify probable synapses. Some puncta were comparably positive for both ABP and GRIP, but the majority were strongly positive for one antigen and only weakly positive or immunonegative for the other. This heterogeneity could be seen even within adjacent spines of a single dendrite. These data suggest that ABP may act as a scaffold for AMPA receptors either in concert with or independently from GRIP.
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Affiliation(s)
- A Burette
- Department of Cell Biology and Anatomy, University of North Carolina, Chapel Hill, North Carolina 27599, USA
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41
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Affiliation(s)
- M Sheng
- MGH and Harvard Medical School, Howard Hughes Medical Institute (Wellman 423), Massachusetts General Hospital, Boston, MA 02114, USA
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42
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Nakagawa T, Sheng M. Neurobiology. A stargazer foretells the way to the synapse. Science 2000; 290:2270-1. [PMID: 11188726] [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]
Abstract
How do AMPA receptors that are made in the cytoplasm of excitatory neurons travel to and become localized in the distant postsynaptic membranes of dendrites? Nakagawa and Sheng, in a Perspective, suggest that the answer may lie in the stargazin protein that has now been found to interact with AMPA receptors, guiding them to the postsynaptic membrane.
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Affiliation(s)
- T Nakagawa
- Department of Neurobiology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts, USA
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43
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Lin JW, Ju W, Foster K, Lee SH, Ahmadian G, Wyszynski M, Wang YT, Sheng M. Distinct molecular mechanisms and divergent endocytotic pathways of AMPA receptor internalization. Nat Neurosci 2000; 3:1282-90. [PMID: 11100149 DOI: 10.1038/81814] [Citation(s) in RCA: 470] [Impact Index Per Article: 19.6] [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: 11/09/2022]
Abstract
Internalization of postsynaptic AMPA receptors depresses excitatory transmission, but the underlying dynamics and mechanisms of this process are unclear. Using immunofluorescence and surface biotinylation, we characterized and quantified basal and regulated AMPA receptor endocytosis in cultured hippocampal neurons, in response to synaptic activity, AMPA and insulin. AMPA-induced AMPA receptor internalization is mediated in part by secondary activation of voltage-dependent calcium channels, and in part by ligand binding independent of receptor activation. Although both require dynamin, insulin- and AMPA-induced AMPA receptor internalization are differentially dependent on protein phosphatases and sequence determinants within the cytoplasmic tails of GluR1 and GluR2 subunits. AMPA receptors internalized in response to AMPA stimulation enter a recycling endosome system, whereas those internalized in response to insulin diverge into a distinct compartment. Thus, the molecular mechanisms and intracellular sorting of AMPA receptors are diverse, and depend on the internalizing stimulus.
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Affiliation(s)
- J W Lin
- Howard Hughes Medical Institute, Massachusetts General Hospital (Wellman 423), 50 Blossom Street, Boston, Massachusetts 02114, USA
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44
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Abstract
The fundamental function of the membrane-associated cytoskeletal proteins dystrophin and utrophin remains unclear. To gain further insights into the dystrophin family of proteins, we have studied dystrophin-related protein 2 (DRP2), whose expression is largely confined to the vertebrate central nervous system. Both human and rat DRP2 are expressed from two alternative but neighboring transcriptional start sites and have simple transcript structures. Antibodies raised against DRP2 detect a characteristic quartet of bands ( approximately 100-120 kDa) in Western blots of rat brain. The DRP2 protein is associated with brain membrane fractions and highly enriched in the postsynaptic density. Immunohistochemistry shows DRP2 to be widely distributed in a punctate pattern on neuronal dendrites and in neuropil, with particular concentration in regions of the brain involved in cholinergic synaptic transmission. Given the presence of utrophin in the cholinergic neuromuscular junction, and perturbations of cholinergic transmission in dystrophin-deficient nematodes, our findings may suggest a role for DRP2 in the organization of central cholinergic synapses.
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Affiliation(s)
- R G Roberts
- Howard Hughes Medical Institute, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.
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45
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Abstract
In recent years, it has become apparent that ligand-gated ion channels (ionotropic receptors) in the neuronal plasma membrane interact via their cytoplasmic domains with a multitude of intracellular proteins. Different classes of ligand-gated channels associate with distinct sets of intracellular proteins, often through specialized scaffold proteins containing PDZ domains. These specific interactions link the receptor channel to the cortical cytoskeleton and to appropriate signal transduction pathways in the cell. Thus ionotropic receptors are components of extensive protein complexes that are likely involved in the subcellular targeting, cytoskeletal anchoring, and localized clustering of the receptors at specific sites on the neuronal surface. In addition to structural functions, receptor-associated proteins can play important roles as activity modulators or downstream effectors of ligand-gated channels.
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Affiliation(s)
- M Sheng
- Department of Neurobiology, Massachusetts General Hospital, Boston, Massachusetts, USA.
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46
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Sheng M, Zheng Y, Lin A, Chen Y, Li P, Li Y, Qu C, Zhu Y, Guan Y. [Cataract extraction with rotated-chipping phacoemulsification in the capsule]. Zhonghua Yan Ke Za Zhi 2000; 36:334-6. [PMID: 11853622] [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: 02/23/2023]
Abstract
OBJECTIVE To observe the clinical effects of rotated-chipping phacoemulsification in the capsule. METHODS The operation of continuous circular capsulectomy, nuclear hydrodissection, cataract extraction with rotated-chipping phacoemulsification in capsule and intraocular lens implantation was performed on 215 eyes. RESULTS Rotated-chipping technique was successfully completed in 215 eyes. In the operation 2 to 4 circles were rotated with the ultrasonic energy 19.3% for 12 seconds on average. The rate of corneal endothelium loss was 7.5%. CONCLUSION The technique of rotated-chipping phacoemulsification in capsule is safe and rapid which can be used for cataracts with nuclei of various degrees in sclerosis.
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Affiliation(s)
- M Sheng
- Department of Ophthalmology, Railway Hospital, Shanghai Railway University, Shanghai 200072, China
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47
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48
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Dunah AW, Wyszynski M, Martin DM, Sheng M, Standaert DG. alpha-actinin-2 in rat striatum: localization and interaction with NMDA glutamate receptor subunits. Brain Res Mol Brain Res 2000; 79:77-87. [PMID: 10925145 DOI: 10.1016/s0169-328x(00)00102-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Alpha-actinin (alpha-actinin-2) is a protein which links the NR1 and NR2B subunits of N-methyl-D-aspartate (NMDA) glutamate receptors to the actin cytoskeleton. Because of the importance of NMDA receptors in modulating the function of the striatum, we have examined the localization of alpha-actinin-2 protein and mRNA in striatal neurons, and its biochemical interaction with NMDA receptor subunits present in the rat striatum. Using an alpha-actinin-2-specific antibody, we found intense immunoreactivity in the striatal neuropil and within striatal neurons that also expressed parvalbumin, calretinin and calbindin. Conversely, alpha-actinin-2 immunoreactivity was not detected in neurons expressing choline acetyltransferase and neuronal nitric oxide synthase. Dual-label in situ hybridization revealed that the highest expression of alpha-actinin-2 mRNA is in substance P-containing striatal projection neurons. The alpha-actinin-2 mRNA is also present in enkephalinergic projection neurons and interneurons expressing parvalbumin, choline acetyl transferase and the 67-kDa isoform of glutamic acid decarboxylase, but was not detected in somatostatin-expressing interneurons. Immunoprecipitation of membrane protein extracts showed that alpha-actinin-2 is present in heteromeric complexes of NMDA subunits, but is not associated with AMPA receptors in the striatum. A subunit-specific anti-NR1 antibody co-precipitated major fractions of NR2A and NR2B subunits, but only a minor fraction of striatal alpha-actinin-2. Conversely, alpha-actinin-2 antibody immunoprecipitated only modest fractions of striatal NR1, NR2A and NR2B subunits. These data demonstrate that alpha-actinin-2 is a very abundant striatal protein, but exhibits cellular specificity in its expression, with very high levels in substance-P-containing projection neurons, and very low levels in somatostatin and neuronal nitric oxide synthase interneurons. Despite the high expression of this protein in the striatum, only a minority of NMDA receptors are linked to alpha-actinin-2. This interaction may identify a subset of receptors with distinct anatomical and functional properties.
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Affiliation(s)
- A W Dunah
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School Warren 408, Boston, MA 02114, USA
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49
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Naisbitt S, Valtschanoff J, Allison DW, Sala C, Kim E, Craig AM, Weinberg RJ, Sheng M. Interaction of the postsynaptic density-95/guanylate kinase domain-associated protein complex with a light chain of myosin-V and dynein. J Neurosci 2000; 20:4524-34. [PMID: 10844022 PMCID: PMC6772433] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2000] [Revised: 03/14/2000] [Accepted: 03/24/2000] [Indexed: 02/16/2023] Open
Abstract
NMDA receptors interact directly with postsynaptic density-95 (PSD-95), a scaffold protein that organizes a cytoskeletal- signaling complex at the postsynaptic membrane. The molecular mechanism by which the PSD-95-based protein complex is trafficked to the postsynaptic site is unknown but presumably involves specific motor proteins. Here we demonstrate a direct interaction between the PSD-95-associated protein guanylate kinase domain-associated protein (GKAP) and dynein light chain (DLC), a light chain subunit shared by myosin-V (an actin-based motor) and cytoplasmic dynein (a microtubule-based motor). A yeast two-hybrid screen with GKAP isolated DLC2, a novel protein 93% identical to the previously cloned 8 kDa dynein light chain (DLC1). A complex containing PSD-95, GKAP, DLC, and myosin-V can be immunoprecipitated from rat brain extracts. DLC colocalizes with PSD-95 and F-actin in dendritic spines of cultured neurons and is enriched in biochemical purifications of PSD. Immunogold electron microscopy reveals a concentration of DLC in the postsynaptic compartment of asymmetric synapses of brain in which it is associated with the PSD and the spine apparatus. We discuss the possibility that the GKAP/DLC interaction may be involved in trafficking of the PSD-95 complex by motor proteins.
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Affiliation(s)
- S Naisbitt
- Howard Hughes Medical Institute, Department of Neurobiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA
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50
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Abstract
Shank proteins make up a new family of scaffold proteins recently identified through their interaction with a variety of membrane and cytoplasmic proteins. Shank polypeptides contain multiple sites for protein-protein interaction, including ankyrin repeats, an SH3 domain, a PDZ domain, a long proline-rich region, and a SAM domain. Binding partners for most of these domains have been identified: for instance, the PDZ domain of Shank proteins interacts with GKAP (a postsynaptic-density protein) as well as several G-protein-coupled receptors. The specific localization of Shank proteins at postsynaptic sites of brain excitatory synapses suggests a role for this family of proteins in the organization of cytoskeletal/ signaling complexes at specialized cell junctions.
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Affiliation(s)
- M Sheng
- Howard Hughes Medical Institute and Department of Neurobiology, Massachusetts General Hospital and Harvard Medical School, Boston ,MA 02114, USA.
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