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Kochanowsky JA, Mira PM, Elikaee S, Muratore K, Rai AK, Riestra AM, Johnson PJ. Trichomonas vaginalis extracellular vesicles up-regulate and directly transfer adherence factors promoting host cell colonization. Proc Natl Acad Sci U S A 2024; 121:e2401159121. [PMID: 38865261 DOI: 10.1073/pnas.2401159121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 05/16/2024] [Indexed: 06/14/2024] Open
Abstract
Trichomonas vaginalis, a common sexually transmitted parasite that colonizes the human urogenital tract, secretes extracellular vesicles (TvEVs) that are taken up by human cells and are speculated to be taken up by parasites as well. While the crosstalk between TvEVs and human cells has led to insight into host:parasite interactions, roles for TvEVs in infection have largely been one-sided, with little known about the effect of TvEV uptake by T. vaginalis. Approximately 11% of infections are found to be coinfections of multiple T. vaginalis strains. Clinical isolates often differ in their adherence to and cytolysis of host cells, underscoring the importance of understanding the effects of TvEV uptake within the parasite population. To address this question, our lab tested the ability of a less adherent strain of T. vaginalis, G3, to take up fluorescently labeled TvEVs derived from both itself (G3-EVs) and TvEVs from a more adherent strain of the parasite (B7RC2-EVs). Here, we showed that TvEVs generated from the more adherent strain are internalized more efficiently compared to the less adherent strain. Additionally, preincubation of G3 parasites with B7RC2-EVs increases parasite aggregation and adherence to host cells. Transcriptomics revealed that TvEVs up-regulate expression of predicted parasite membrane proteins and identified an adherence factor, heteropolysaccharide binding protein (HPB2). Finally, using comparative proteomics and superresolution microscopy, we demonstrated direct transfer of an adherence factor, cadherin-like protein, from TvEVs to the recipient parasite's surface. This work identifies TvEVs as a mediator of parasite:parasite communication that may impact pathogenesis during mixed infections.
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Affiliation(s)
- Joshua A Kochanowsky
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA 90095
| | - Portia M Mira
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA 90095
| | - Samira Elikaee
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA 90095
| | - Katherine Muratore
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA 90095
| | - Anand Kumar Rai
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA 90095
| | - Angelica M Riestra
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA 90095
- Department of Biology, San Diego State University, San Diego, CA 92182
| | - Patricia J Johnson
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA 90095
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Coleman JC, Tattersall L, Yianni V, Knight L, Yu H, Hallett SR, Johnson P, Caetano AJ, Cosstick C, Ridley AJ, Gartland A, Conte MR, Grigoriadis AE. The RNA binding proteins LARP4A and LARP4B promote sarcoma and carcinoma growth and metastasis. iScience 2024; 27:109288. [PMID: 38532886 PMCID: PMC10963253 DOI: 10.1016/j.isci.2024.109288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 11/01/2023] [Accepted: 02/16/2024] [Indexed: 03/28/2024] Open
Abstract
RNA-binding proteins (RBPs) are emerging as important regulators of cancer pathogenesis. We reveal that the RBPs LARP4A and LARP4B are differentially overexpressed in osteosarcoma and osteosarcoma lung metastases, as well as in prostate cancer. Depletion of LARP4A and LARP4B reduced tumor growth and metastatic spread in xenografts, as well as inhibiting cell proliferation, motility, and migration. Transcriptomic profiling and high-content multiparametric analyses unveiled a central role for LARP4B, but not LARP4A, in regulating cell cycle progression in osteosarcoma and prostate cancer cells, potentially through modulating key cell cycle proteins such as Cyclins B1 and E2, Aurora B, and E2F1. This first systematic comparison between LARP4A and LARP4B assigns new pro-tumorigenic functions to LARP4A and LARP4B in bone and prostate cancer, highlighting their similarities while also indicating distinct functional differences. Uncovering clear biological roles for these paralogous proteins provides new avenues for identifying tissue-specific targets and potential druggable intervention.
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Affiliation(s)
- Jennifer C. Coleman
- Centre for Craniofacial & Regenerative Biology, King’s College London, London, SE1 9RT UK
- Randall Centre for Cell and Molecular Biophysics, King’s College London, London, SE1 1UL UK
| | - Luke Tattersall
- The Mellanby Centre for Musculoskeletal Research, Department of Oncology and Metabolism, The University of Sheffield, Sheffield, S10 2RX UK
| | - Val Yianni
- Centre for Craniofacial & Regenerative Biology, King’s College London, London, SE1 9RT UK
| | - Laura Knight
- Centre for Craniofacial & Regenerative Biology, King’s College London, London, SE1 9RT UK
| | - Hongqiang Yu
- Centre for Craniofacial & Regenerative Biology, King’s College London, London, SE1 9RT UK
| | - Sadie R. Hallett
- Randall Centre for Cell and Molecular Biophysics, King’s College London, London, SE1 1UL UK
| | - Philip Johnson
- Centre for Craniofacial & Regenerative Biology, King’s College London, London, SE1 9RT UK
| | - Ana J. Caetano
- Centre for Craniofacial & Regenerative Biology, King’s College London, London, SE1 9RT UK
| | - Charlie Cosstick
- Centre for Craniofacial & Regenerative Biology, King’s College London, London, SE1 9RT UK
| | - Anne J. Ridley
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD UK
| | - Alison Gartland
- The Mellanby Centre for Musculoskeletal Research, Department of Oncology and Metabolism, The University of Sheffield, Sheffield, S10 2RX UK
| | - Maria R. Conte
- Randall Centre for Cell and Molecular Biophysics, King’s College London, London, SE1 1UL UK
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Song X, Na R, Peng N, Cao W, Ke Y. Exploring the role of macrophages in the progression from atypical hyperplasia to endometrial carcinoma through single-cell transcriptomics and bulk transcriptomics analysis. Front Endocrinol (Lausanne) 2023; 14:1198944. [PMID: 37780629 PMCID: PMC10537943 DOI: 10.3389/fendo.2023.1198944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 08/29/2023] [Indexed: 10/03/2023] Open
Abstract
Introduction In this study, we aimed to identify key genes in endometrial cancer by conducting single-cell analysis of macrophages. Methods We sourced clinical data from the TCGA database as well as supplementary datasets GSE201926 and GSE173682. Using bulk-seq data of atypical endometrial hyperplasia and endometrial cancer, we pinpointed key differentially expressed genes. Single-cell RNA sequencing was utilized for further gene expression analysis. Cluster analysis was conducted on TCGA tumor data, identifying two distinct subtypes. Statistical methods employed included LASSO regression for diagnostic modeling and various clustering algorithms for subtype identification. Results We found that subtype B was closely related to cellular metabolism. A diagnostic model was established using LASSO regression and was based on the genes CDH18, H19, PAGE2B, PXDN, and THRB. This model effectively differentiated the prognosis of cervical cancer. We also constructed a prognosis model and a column chart based on these key genes. Discussion Through CIBERSORT analysis, CDH18 and PAGE2B were found to be strongly associated with macrophage M0. We propose that these genes influence the transformation from atypical endometrial hyperplasia to endometrial cancer by affecting macrophage M0. In conclusion, these key genes may serve as therapeutic targets for endometrial cancer. A new endometrial cancer risk prognosis model and column chart have been constructed based on these genes, offering a reliable direction for future cervical cancer treatment.
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Affiliation(s)
| | | | | | - Wenming Cao
- Department of Gynecology, Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, China
| | - Yan Ke
- Department of Gynecology, Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, China
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4
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Bialic M, Al Ahmad Nachar B, Koźlak M, Coulon V, Schwob E. Measuring S-Phase Duration from Asynchronous Cells Using Dual EdU-BrdU Pulse-Chase Labeling Flow Cytometry. Genes (Basel) 2022; 13:genes13030408. [PMID: 35327961 PMCID: PMC8951228 DOI: 10.3390/genes13030408] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/17/2022] [Accepted: 02/20/2022] [Indexed: 02/07/2023] Open
Abstract
Eukaryotes duplicate their chromosomes during the cell cycle S phase using thousands of initiation sites, tunable fork speed and megabase-long spatio-temporal replication programs. The duration of S phase is fairly constant within a given cell type, but remarkably plastic during development, cell differentiation or various stresses. Characterizing the dynamics of S phase is important as replication defects are associated with genome instability, cancer and ageing. Methods to measure S-phase duration are so far indirect, and rely on mathematical modelling or require cell synchronization. We describe here a simple and robust method to measure S-phase duration in cell cultures using a dual EdU-BrdU pulse-labeling regimen with incremental thymidine chases, and quantification by flow cytometry of cells entering and exiting S phase. Importantly, the method requires neither cell synchronization nor genome engineering, thus avoiding possible artifacts. It measures the duration of unperturbed S phases, but also the effect of drugs or mutations on it. We show that this method can be used for both adherent and suspension cells, cell lines and primary cells of different types from human, mouse and Drosophila. Interestingly, the method revealed that several commonly-used cancer cell lines have a longer S phase compared to untransformed cells.
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Affiliation(s)
- Marta Bialic
- Institut de Génétique Moléculaire de Montpellier, Univ Montpellier, CNRS, 34293 Montpellier, France; (M.B.); (B.A.A.N.); (M.K.); (E.S.)
- Institut de Médecine Régénératrice et Biothérapie, INSERM, CHU, 34295 Montpellier, France
| | - Baraah Al Ahmad Nachar
- Institut de Génétique Moléculaire de Montpellier, Univ Montpellier, CNRS, 34293 Montpellier, France; (M.B.); (B.A.A.N.); (M.K.); (E.S.)
| | - Maria Koźlak
- Institut de Génétique Moléculaire de Montpellier, Univ Montpellier, CNRS, 34293 Montpellier, France; (M.B.); (B.A.A.N.); (M.K.); (E.S.)
| | - Vincent Coulon
- Institut de Génétique Moléculaire de Montpellier, Univ Montpellier, CNRS, 34293 Montpellier, France; (M.B.); (B.A.A.N.); (M.K.); (E.S.)
- Correspondence: ; Tel.: +33-43435-9679
| | - Etienne Schwob
- Institut de Génétique Moléculaire de Montpellier, Univ Montpellier, CNRS, 34293 Montpellier, France; (M.B.); (B.A.A.N.); (M.K.); (E.S.)
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Orang A, Ali SR, Petersen J, McKinnon RA, Aloia AL, Michael MZ. A functional screen with metformin identifies microRNAs that regulate metabolism in colorectal cancer cells. Sci Rep 2022; 12:2889. [PMID: 35190587 PMCID: PMC8861101 DOI: 10.1038/s41598-022-06587-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 01/28/2022] [Indexed: 12/11/2022] Open
Abstract
Metformin inhibits oxidative phosphorylation and can be used to dissect metabolic pathways in colorectal cancer (CRC) cells. CRC cell proliferation is inhibited by metformin in a dose dependent manner. MicroRNAs that regulate metabolism could be identified by their ability to alter the effect of metformin on CRC cell proliferation. An unbiased high throughput functional screen of a synthetic micoRNA (miRNA) library was used to identify miRNAs that impact the metformin response in CRC cells. Experimental validation of selected hits identified miRNAs that sensitize CRC cells to metformin through modulation of proliferation, apoptosis, cell-cycle and direct metabolic disruption. Among eight metformin sensitizing miRNAs identified by functional screening, miR-676-3p had both pro-apoptotic and cell cycle arrest activity in combination with metformin, whereas other miRNAs (miR-18b-5p, miR-145-3p miR-376b-5p, and miR-718) resulted primarily in cell cycle arrest when combined with metformin. Investigation of the combined effect of miRNAs and metformin on CRC cell metabolism showed that miR-18b-5p, miR-145-3p, miR-376b-5p, miR-676-3p and miR-718 affected glycolysis only, while miR-1181 only regulated CRC respiration. MicroRNAs can sensitize CRC cells to the anti-proliferative effects of metformin. Identifying relevant miRNA targets may enable the design of innovative therapeutic strategies.
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Affiliation(s)
- Ayla Orang
- Flinders Health and Medical Research Institute - Cancer Program, Flinders University, Adelaide, South Australia, 5042, Australia
| | - Saira R Ali
- Flinders Health and Medical Research Institute - Cancer Program, Flinders University, Adelaide, South Australia, 5042, Australia
| | - Janni Petersen
- Flinders Health and Medical Research Institute - Cancer Program, Flinders University, Adelaide, South Australia, 5042, Australia
| | - Ross A McKinnon
- Flinders Health and Medical Research Institute - Cancer Program, Flinders University, Adelaide, South Australia, 5042, Australia
| | - Amanda L Aloia
- Cell Screen SA Facility, Flinders Health and Medical Research Institute, Flinders University, Bedford Park, South Australia, 5042, Australia
| | - Michael Z Michael
- Flinders Health and Medical Research Institute - Cancer Program, Flinders University, Adelaide, South Australia, 5042, Australia. .,Department Gastroenterology and Hepatology, Flinders Centre for Innovation in Cancer, Flinders Medical Centre, Bedford Park, South Australia, 5042, Australia.
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Massey AJ, Benwell K, Burbridge M, Kotschy A, Walmsley DL. Targeting DYRK1A/B kinases to modulate p21-cyclin D1-p27 signalling and induce anti-tumour activity in a model of human glioblastoma. J Cell Mol Med 2021; 25:10650-10662. [PMID: 34708541 PMCID: PMC8581321 DOI: 10.1111/jcmm.17002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 09/08/2021] [Accepted: 09/30/2021] [Indexed: 12/24/2022] Open
Abstract
The dual-specificity tyrosine-regulated kinases DYRK1A and DYRK1B play a key role in controlling the quiescence-proliferation switch in cancer cells. Serum reduction of U87MG 2D cultures or multi-cellular tumour spheroids induced a quiescent like state characterized by increased DYRK1B and p27, and decreased pRb and cyclin D1. VER-239353 is a potent, selective inhibitor of the DYRK1A and DYRK1B kinases identified through fragment and structure-guided drug discovery. Inhibition of DYRK1A/B by VER-239353 in quiescent U87MG cells increased pRb, DYRK1B and cyclin D1 but also increased the cell cycle inhibitors p21 and p27. This resulted in exit from G0 but subsequent arrest in G1. DYRK1A/B inhibition reduced the proliferation of U87MG cells in 2D and 3D culture with greater effects observed under reduced serum conditions. Paradoxically, the induced re-expression of cell cycle proteins by DYRK1A/B inhibition further inhibited cell proliferation. Cell growth arrest induced in quiescent cells by DYRK1A/B inhibition was reversible through the addition of growth-promoting factors. DYRK inhibition-induced DNA damage and synergized with a CHK1 inhibitor in the U87MG spheroids. In vivo, DYRK1A/B inhibition-induced tumour stasis in a U87MG tumour xenograft model. These results suggest that further evaluation of VER-239353 as a treatment for glioblastoma is therefore warranted.
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Affiliation(s)
| | | | - Mike Burbridge
- Institut de Recherches ServierCroissy‐sur‐SeineFrance
- Present address:
EngitixLondonUK
| | - Andras Kotschy
- Servier Research Institute of Medicinal ChemistryBudapestHungary
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7
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Abstract
The thymidine analogues BrdU (5-bromo-2´-deoxyuridine) and EdU (5-ethynyl-2´-deoxyuridine) are routinely used for determination of the cells synthesizing DNA in the S-phase of the cell cycle. Availability of the anti-BrdU antibody clone MoBu-1 detecting only BrdU allowed to develop a method for the sequential DNA labelling by these two thymidine analogues for determining the cell cycle kinetic parameters.In the current step-by-step protocol, we present` two approaches optimized for in vivo study of the cell cycle and the limitations that such approaches imply: (1) determination of the cell flow rate into the G2-phase by dual EdU/BrdU DNA-labelling method and (2) determination of the outflow of DNA-labelled cells arising from the mitosis.
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8
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Tirado TC, de Andrade AJ, Ribeiro MCVDC, Figueiredo FB. Use of the high-content imaging system equipment to evaluate in vitro infection by Leishmania braziliensis in response to sand fly Nyssomyia neivai saliva. Acta Trop 2020; 209:105540. [PMID: 32442434 DOI: 10.1016/j.actatropica.2020.105540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/13/2020] [Accepted: 05/13/2020] [Indexed: 12/13/2022]
Abstract
Earlier research has shown that in vivo immunization with sand fly saliva protects the host against infection by parasites of genus Leishmania, and inoculation of saliva along with Leishmania promastigotes favors infection in the host. In this study, High-Content Imaging System was used to demonstrate in vitro that sand fly saliva also promotes infection by these parasites. THP-1 cells were cultured in 96-well microplates and challenged with three strains of Leishmania braziliensis plus four dilutions of Nyssomyia neivai salivary gland extract. High-Content Imaging System equipment (Operetta CLS, Perkin Elmer) was configured to automatically count both cells and parasites inside the microplates and subsequently calculate the Infection Index (II). Results demonstrate that the extract concentration of 1 gland showed greater infection than other dilutions. These findings suggest that sand fly N. neivai saliva has potential for increasing the parasite infection, reinforcing the importance of studying its components. A new method to evaluate Leishmania infection in vitro assays was also presented, broadening this area of study.
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Affiliation(s)
- Thais Cristina Tirado
- Laboratório de Parasitologia Molecular, Departamento de Patologia Básica, Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brazil; Laboratório de Biologia Celular, Instituto Carlos Chagas, Fundação Oswaldo Cruz (FIOCRUZ), Curitiba, Paraná, Brazil.
| | - Andrey José de Andrade
- Laboratório de Parasitologia Molecular, Departamento de Patologia Básica, Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brazil
| | | | - Fabiano Borges Figueiredo
- Laboratório de Biologia Celular, Instituto Carlos Chagas, Fundação Oswaldo Cruz (FIOCRUZ), Curitiba, Paraná, Brazil
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9
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Zhang Z, Zhang T, Cao L, Wang X, Cao J, Huang X, Cai Y, Lin Z, Pan H, Yuan Q, Fang M, Li S, Zhang J, Xia N, Zhao Q. Simultaneous in situ visualization and quantitation of dual antigens adsorbed on adjuvants using high content analysis. Nanomedicine (Lond) 2019; 14:2535-2548. [PMID: 31603382 DOI: 10.2217/nnm-2019-0016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Aim: Traditional antigenicity assay requires antigen recovery from the particulate adjuvants prior to analysis. An in situ method was developed for interrogating vaccine antigens with monoclonal antibodies while being adsorbed on adjuvants. Materials & methods: The fluorescence imaging-based high content analysis was used to visualize the antigen distribution on adjuvant agglomerates and to analyze the antigenicity for adsorbed antigens. Results: Simultaneous visualization and quantitation were achieved for dual antigens in a bivalent human papillomavirus vaccine with uniquely labeled antibodies. Good agreement was observed between the in situ multiplexed assays with well-established sandwich enzyme-linked immunosorbent assays. Conclusion: The streamlined procedures and the amenability for multiplexing make the in situ antigenicity analysis a favorable choice for in vitro functional assessment of bionanoparticles as vaccine antigens.
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Affiliation(s)
- Zhigang Zhang
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Tianying Zhang
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Lu Cao
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Xin Wang
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Jiali Cao
- National Institute of Diagnostics & Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Xiaofen Huang
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Yashuang Cai
- National Institute of Diagnostics & Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Zhijie Lin
- Xiamen Innovax Biotech Co., Ltd, Xiamen, Fujian 361022, PR China
| | - Huirong Pan
- Xiamen Innovax Biotech Co., Ltd, Xiamen, Fujian 361022, PR China
| | - Quan Yuan
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China.,National Institute of Diagnostics & Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Mujin Fang
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Shaowei Li
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China.,National Institute of Diagnostics & Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Jun Zhang
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Ningshao Xia
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China.,National Institute of Diagnostics & Vaccine Development in Infectious Diseases, School of Life Sciences, Xiamen University, Xiamen, Fujian 361105, PR China
| | - Qinjian Zhao
- State Key Laboratory of Molecular Vaccinology & Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian 361105, PR China
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He JS, Soo P, Evers M, Parsons KM, Hein N, Hannan KM, Hannan RD, George AJ. High-Content Imaging Approaches to Quantitate Stress-Induced Changes in Nucleolar Morphology. Assay Drug Dev Technol 2019; 16:320-332. [PMID: 30148664 DOI: 10.1089/adt.2018.861] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The nucleolus is a dynamic subnuclear compartment that has a number of different functions, but its primary role is to coordinate the production and assembly of ribosomes. For well over 100 years, pathologists have used changes in nucleolar number and size to stage diseases such as cancer. New information about the nucleolus' broader role within the cell is leading to the development of drugs which directly target its structure as therapies for disease. Traditionally, it has been difficult to develop high-throughput image analysis pipelines to measure nucleolar changes due to the broad range of morphologies observed. In this study, we describe a simple high-content image analysis algorithm using Harmony software (PerkinElmer), with a PhenoLOGIC™ machine-learning component, that can measure and classify three different nucleolar morphologies based on nucleolin and fibrillarin staining ("normal," "peri-nucleolar rings" and "dispersed"). We have utilized this algorithm to determine the changes in these classes of nucleolar morphologies over time with drugs known to alter nucleolar structure. This approach could be further adapted to include other parameters required for the identification of new therapies that directly target the nucleolus.
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Affiliation(s)
- Jin-Shu He
- 1 ANU Centre for Therapeutic Discovery, The Australian National University , Acton, Australia
| | - Priscilla Soo
- 2 ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University , Acton, Australia
| | - Maurits Evers
- 2 ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University , Acton, Australia
| | - Kate M Parsons
- 1 ANU Centre for Therapeutic Discovery, The Australian National University , Acton, Australia
| | - Nadine Hein
- 2 ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University , Acton, Australia
| | - Katherine M Hannan
- 2 ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University , Acton, Australia .,3 Department of Biochemistry and Molecular Biology, University of Melbourne , Parkville, Australia
| | - Ross D Hannan
- 2 ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University , Acton, Australia .,3 Department of Biochemistry and Molecular Biology, University of Melbourne , Parkville, Australia .,4 Sir Peter MacCallum Department of Oncology, University of Melbourne , Parkville, Australia .,5 Department of Biochemistry and Molecular Biology, University of Melbourne , Parkville, Australia .,6 Department of Biochemistry and Molecular Biology, Monash University , Clayton, Australia .,7 School of Biomedical Sciences, University of Queensland , St Lucia, Australia
| | - Amee J George
- 1 ANU Centre for Therapeutic Discovery, The Australian National University , Acton, Australia .,2 ACRF Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University , Acton, Australia .,7 School of Biomedical Sciences, University of Queensland , St Lucia, Australia .,8 Department of Clinical Pathology, University of Melbourne , Parkville, Australia
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Novel Semi-Replicative Retroviral Vector Mediated Double Suicide Gene Transfer Enhances Antitumor Effects in Patient-Derived Glioblastoma Models. Cancers (Basel) 2019; 11:cancers11081090. [PMID: 31370279 PMCID: PMC6721803 DOI: 10.3390/cancers11081090] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 07/12/2019] [Accepted: 07/30/2019] [Indexed: 01/10/2023] Open
Abstract
As glioblastomas are mostly localized infiltrative lesions, gene therapy based on the retroviral replicating vector (RRV) system is considered an attractive strategy. Combinations of multiple suicide genes can circumvent the limitations associated with each gene, achieving direct and synergistic cytotoxic effects, along with bystander cell killing. In this study, we constructed a semi-and pseudotyped-RRV (sp-RRV) system harboring two suicide genes—herpes simplex virus type 1 thymidine kinase (TK) and yeast cytosine deaminase (CD)—to verify the dissemination and antitumor efficacy of our sp-RRV system (spRRVe-sEF1α-TK/sRRVgp-sEF1α-CD) in seven patient-derived glioblastoma stem-like cells (GSCs). Flow cytometry and high-content analysis revealed a wide range of transduction efficiency and good correlation between the delivery of therapeutic genes and susceptibility to the prodrugs ganciclovir and 5-fluorocytosine in patient-derived GSCs in vitro. Intra-tumoral delivery of spRRVe-sEF1α-TK/sRRVgp-sEF1α-CD, combined with prodrug treatment, synergistically inhibited cell proliferation and angiogenesis while increasing apoptosis and the depletion of tumor-associated macrophages in orthotopic glioblastoma xenografts. Genomic profiling of patient-derived GSCs revealed that the key genes preventing sp-RRV infection and transmission were associated with cell adhesion, migration, development, differentiation, and proliferation. This is the first report demonstrating that a novel sp-RRV-mediated TK/CD double suicide gene transfer system has high oncolytic power against extremely heterogeneous and treatment-refractory glioblastomas.
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Wang T, Chen X, Yu J, Du Q, Zhu J, Yang M, Wu H, Wang M, Zhu Y. High-Throughput Electrophysiology Screen Revealed Cardiotoxicity of Strychnine by Selectively Targeting hERG Channel. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2018; 46:1825-1840. [PMID: 30545237 DOI: 10.1142/s0192415x1850091x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Although the efficacy and the health care advantages of Chinese herbal medicine (CHM) have become increasingly recognized worldwide, the potential side effects and toxicity still restrict its broader application. This study established and applied an integrated platform anchored on automatic patch clamp system to screen and evaluate a collection of CHM extracts, compositions and monomeric compounds for in vitro cardiac toxicity. Of 1036 CHM samples screened, 2.79% significantly inhibited hERG channel activity. Among them, Strychnine was identified for the first time as a potent hERG inhibitor with an IC 50 of 6.65±1.04μ M in comparison to that of Dofetilide at 1.80±0.24μ M and Quinidine at 7.42±0.54μ M. Langendorff-perfusion experiments confirmed that strychnine increased QT interphase from 71.69±5.34 ms to 98.61±5.54 ms and decreased heart rates from 227.65±5.40 bmp to 162.91±14.70 bmp in isolated rat hearts. The cardiac toxicity effect of strychnine appears to be specific to hERG channel since an in vitro multiplex imaging analysis showed that it did not affect cellular phenotypes such as cell vitality, nucleus area, mitochondria mass and function, nor intracellular calcium in rat primary myocytes. This integrated high-throughput hERG patch clamp and high-content multi-parameter imaging cardiac toxicity screen approach should be useful for large-scale preclinical evaluation of complex Chinese herbal medicine.
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Affiliation(s)
- Taiyi Wang
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
| | - Xiaonan Chen
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
| | - Jiahui Yu
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
| | - Qunqun Du
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
| | - Jie Zhu
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
| | - Mingzhu Yang
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
| | - Honghua Wu
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
| | - Meng Wang
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
| | - Yan Zhu
- 1 Tianjin State Key Laboratory of Modern, Chinese Medicine, Tianjin University of Traditional, Chinese Medicine, Tianjin 300193, P. R. China.,2 Research and Development Center of TCM, Tianjin International Joint Academy of Biotechnology and Medicine, Tianjin 300457, P. R. China
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13
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Cell Cycle Regulation by Ca 2+-Activated K⁺ (BK) Channels Modulators in SH-SY5Y Neuroblastoma Cells. Int J Mol Sci 2018; 19:ijms19082442. [PMID: 30126198 PMCID: PMC6121591 DOI: 10.3390/ijms19082442] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/02/2018] [Accepted: 08/13/2018] [Indexed: 12/28/2022] Open
Abstract
The effects of Ca2+-activated K+ (BK) channel modulation by Paxilline (PAX) (10−7–10−4 M), Iberiotoxin (IbTX) (0.1–1 × 10−6 M) and Resveratrol (RESV) (1–2 × 10−4 M) on cell cycle and proliferation, AKT1pSer473 phosphorylation, cell diameter, and BK currents were investigated in SH-SY5Y cells using Operetta-high-content-Imaging-System, ELISA-assay, impedentiometric counting method and patch-clamp technique, respectively. IbTX (4 × 10−7 M), PAX (5 × 10−5 M) and RESV (10−4 M) caused a maximal decrease of the outward K+ current at +30 mV (Vm) of −38.3 ± 10%, −31.9 ± 9% and −43 ± 8%, respectively, which was not reversible following washout and cell depolarization. After 6h of incubation, the drugs concentration dependently reduced proliferation. A maximal reduction of cell proliferation, respectively of −60 ± 8% for RESV (2 × 10−4 M) (IC50 = 1.50 × 10−4 M), −65 ± 6% for IbTX (10−6 M) (IC50 = 5 × 10−7 M), −97 ± 6% for PAX (1 × 10−4 M) (IC50 = 1.06 × 10−5 M) and AKT1pser473 dephosphorylation was observed. PAX induced a G1/G2 accumulation and contraction of the S-phase, reducing the nuclear area and cell diameter. IbTX induced G1 contraction and G2 accumulation reducing diameter. RESV induced G2 accumulation and S contraction reducing diameter. These drugs share common actions leading to a block of the surface membrane BK channels with cell depolarization and calcium influx, AKT1pser473 dephosphorylation by calcium-dependent phosphatase, accumulation in the G2 phase, and a reduction of diameter and proliferation. In addition, the PAX action against nuclear membrane BK channels potentiates its antiproliferative effects with early apoptosis.
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14
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Páral P, Faltusová K, Molík M, Renešová N, Šefc L, Nečas E. Cell cycle and differentiation of Sca-1 + and Sca-1 - hematopoietic stem and progenitor cells. Cell Cycle 2018; 17:1979-1991. [PMID: 30084312 DOI: 10.1080/15384101.2018.1502573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Hematopoietic stem and progenitor cells (HSPCs) are crucial for lifelong blood cell production. We analyzed the cell cycle and cell production rate in HSPCs in murine hematopoiesis. The labeling of DNA-synthesizing cells by two thymidine analogues, optimized for in-vivo use, enabled determination of the cell cycle flow rate into G2-phase, the duration of S-phase and the average cell cycle time in Sca-1+ and Sca-1- HSPCs. Determination of cells with 2n DNA content labeled in preceding S-phase was then used to establish the cell flow rates in G1-phase. Our measurements revealed a significant difference in how Sca-1+ and Sca-1- myeloid progenitors self-renew and differentiate. Division of the Sca-1+ progenitors led to loss of the Sca-1 marker in about half of newly produced cells, corresponding to asymmetric cell division. Sca-1- cells arising from cell division entered a new round of the cell cycle, corresponding to symmetric self-renewing cell division. The novel data also enabled the estimation of the cell production rates in Sca-1+ and in three subtypes of Sca-1- HSPCs and revealed Sca-1 negative cells as the major amplification stage in the blood cell development.
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Affiliation(s)
- Petr Páral
- a First Faculty of Medicine , Institute of Pathological Physiology, Charles University , Prague , Czech Republic
| | - Kateřina Faltusová
- a First Faculty of Medicine , Institute of Pathological Physiology, Charles University , Prague , Czech Republic
| | - Martin Molík
- a First Faculty of Medicine , Institute of Pathological Physiology, Charles University , Prague , Czech Republic
| | - Nicol Renešová
- a First Faculty of Medicine , Institute of Pathological Physiology, Charles University , Prague , Czech Republic.,b BIOCEV, Biotechnology and Biomedicine Center of the Academy of Sciences and Charles University in Vestec, Institute of Pathological Physiology, Charles University , Czech Republic
| | - Luděk Šefc
- c Center for Advanced Preclinical Imaging , First Faculty of Medicine, Charles University , Prague , Czech Republic
| | - Emanuel Nečas
- a First Faculty of Medicine , Institute of Pathological Physiology, Charles University , Prague , Czech Republic.,b BIOCEV, Biotechnology and Biomedicine Center of the Academy of Sciences and Charles University in Vestec, Institute of Pathological Physiology, Charles University , Czech Republic
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15
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Rath N, Munro J, Cutiongco MF, Jagiełło A, Gadegaard N, McGarry L, Unbekandt M, Michalopoulou E, Kamphorst JJ, Sumpton D, Mackay G, Vennin C, Pajic M, Timpson P, Olson MF. Rho Kinase Inhibition by AT13148 Blocks Pancreatic Ductal Adenocarcinoma Invasion and Tumor Growth. Cancer Res 2018; 78:3321-3336. [PMID: 29669760 PMCID: PMC6005347 DOI: 10.1158/0008-5472.can-17-1339] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 10/17/2017] [Accepted: 04/12/2018] [Indexed: 12/15/2022]
Abstract
The high mortality of pancreatic cancer demands that new therapeutic avenues be developed. The orally available small-molecule inhibitor AT13148 potently inhibits ROCK1 and ROCK2 kinases that regulate the actomyosin cytoskeleton. We previously reported that ROCK kinase expression increases with human and mouse pancreatic cancer progression and that conditional ROCK activation accelerates mortality in a genetically modified LSL-KrasG12D; LSL-p53R172H; Pdx1-Cre; (KPC) mouse pancreatic cancer model. In this study, we show that treatment of KPC mouse and human TKCC5 patient-derived pancreatic tumor cells with AT13148, as well as the ROCK-selective inhibitors Y27632 and H1152, act comparably in blocking ROCK substrate phosphorylation. AT13148, Y27632, and H1152 induced morphologic changes and reduced cellular contractile force generation, motility on pliable discontinuous substrates, and three-dimensional collagen matrix invasion. AT13148 treatment reduced subcutaneous tumor growth and blocked invasion of healthy pancreatic tissue by KPC tumor cells in vivo without affecting proliferation, suggesting a role for local tissue invasion as a contributor to primary tumor growth. These results suggest that AT13148 has antitumor properties that may be beneficial in combination therapies or in the adjuvant setting to reduce pancreatic cancer cell invasion and slow primary tumor growth. AT13148 might also have the additional benefit of enabling tumor resection by maintaining separation between tumor and healthy tissue boundaries.Significance: Preclinical evaluation of a small-molecule ROCK inhibitor reveals significant effects on PDAC invasion and tumor growth, further validating ROCK kinases as viable therapeutic targets in pancreatic cancer. Cancer Res; 78(12); 3321-36. ©2018 AACR.
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Affiliation(s)
- Nicola Rath
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
| | - June Munro
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
| | - Marie Francene Cutiongco
- Division of Biomedical Engineering, School of Engineering, University of Glasgow, Glasgow, United Kingdom
| | - Alicja Jagiełło
- Division of Biomedical Engineering, School of Engineering, University of Glasgow, Glasgow, United Kingdom
| | - Nikolaj Gadegaard
- Division of Biomedical Engineering, School of Engineering, University of Glasgow, Glasgow, United Kingdom
| | - Lynn McGarry
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
| | | | | | - Jurre J Kamphorst
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
- Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - David Sumpton
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
| | - Gillian Mackay
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
| | - Claire Vennin
- The Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Sydney, Australia
- St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Kensington, Australia
| | - Marina Pajic
- The Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Sydney, Australia
- St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Kensington, Australia
| | - Paul Timpson
- The Garvan Institute of Medical Research & The Kinghorn Cancer Centre, Sydney, Australia
- St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Kensington, Australia
| | - Michael F Olson
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom.
- Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
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16
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Feng M, Betti M. A novel collagen glycopeptide, Pro-Hyp-CONH-GlcN, stimulates cell proliferation and hyaluronan production in cultured human dermal fibroblasts. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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17
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Ong J, Serra MP, Segal J, Cujba AM, Ng SS, Butler R, Millar V, Hatch S, Zimri S, Koike H, Chan K, Bonham A, Walk M, Voss T, Heaton N, Mitry R, Dhawan A, Ebner D, Danovi D, Nakauchi H, Rashid ST. Imaging-Based Screen Identifies Laminin 411 as a Physiologically Relevant Niche Factor with Importance for i-Hep Applications. Stem Cell Reports 2018; 10:693-702. [PMID: 29478892 PMCID: PMC5919292 DOI: 10.1016/j.stemcr.2018.01.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 01/21/2018] [Accepted: 01/22/2018] [Indexed: 12/29/2022] Open
Abstract
Use of hepatocytes derived from induced pluripotent stem cells (i-Heps) is limited by their functional differences in comparison with primary cells. Extracellular niche factors likely play a critical role in bridging this gap. Using image-based characterization (high content analysis; HCA) of freshly isolated hepatocytes from 17 human donors, we devised and validated an algorithm (Hepatocyte Likeness Index; HLI) for comparing the hepatic properties of cells against a physiological gold standard. The HLI was then applied in a targeted screen of extracellular niche factors to identify substrates driving i-Heps closer to the standard. Laminin 411, the top hit, was validated in two additional induced pluripotent stem cell (iPSC) lines, primary tissue, and an in vitro model of α1-antitrypsin deficiency. Cumulatively, these data provide a reference method to control and screen for i-Hep differentiation, identify Laminin 411 as a key niche protein, and underscore the importance of combining substrates, soluble factors, and HCA when developing iPSC applications. iPSC-derived hepatocytes (i-Heps) are functionally limited compared with primary cells Factors within the extracellular niche likely play a role in bridging this gap Laminin 411 was shown to be an important niche factor for i-Heps High content image analysis (HCA) can help development of i-Hep applications
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Affiliation(s)
- John Ong
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Maria Paola Serra
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Joe Segal
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Ana-Maria Cujba
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Soon Seng Ng
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Richard Butler
- The Gurdon Institute Imaging Facility, Cambridge University, Cambridge CB2 1QN, UK
| | - Val Millar
- Target Discovery Institute, Oxford University, Oxford OX3 7FZ, UK
| | - Stephanie Hatch
- Target Discovery Institute, Oxford University, Oxford OX3 7FZ, UK
| | - Salman Zimri
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Hiroyuki Koike
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Karen Chan
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Andrew Bonham
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | | | - Ty Voss
- Perkin Elmer, Houston, TX 77055, USA
| | - Nigel Heaton
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Ragai Mitry
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Anil Dhawan
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Daniel Ebner
- Target Discovery Institute, Oxford University, Oxford OX3 7FZ, UK
| | - Davide Danovi
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK
| | - Hiromitsu Nakauchi
- The Gurdon Institute Imaging Facility, Cambridge University, Cambridge CB2 1QN, UK
| | - S Tamir Rashid
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London SE1 9RT, UK; The Gurdon Institute Imaging Facility, Cambridge University, Cambridge CB2 1QN, UK.
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18
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Wayne J, Brooks T, Massey AJ. Inhibition of Chk1 with the small molecule inhibitor V158411 induces DNA damage and cell death in an unperturbed S-phase. Oncotarget 2018; 7:85033-85048. [PMID: 27829224 PMCID: PMC5356717 DOI: 10.18632/oncotarget.13119] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 10/22/2016] [Indexed: 12/30/2022] Open
Abstract
Chk1 kinase is a critical component of the DNA damage response checkpoint and Chk1 inhibitors are currently under clinical investigation. Chk1 suppresses oncogene-induced replication stress with Chk1 inhibitors demonstrating activity as a monotherapy in numerous cancer types. Understanding the mechanism by which Chk1 inhibitors induce DNA damage and cancer cell death is essential for their future clinical development. Here we characterize the mechanism by which the novel Chk1 inhibitor (V158411) increased DNA damage and cell death in models of human cancer. V158411 induced a time- and concentration-dependent increase in γH2AX-positive nuclei that was restricted to cells actively undergoing DNA synthesis. γH2AX induction was an early event and correlated with activation of the ATR/ATM/DNA-PKcs DNA damage response pathways. The appearance of γH2AX positive nuclei preceded ssDNA appearance and RPA exhaustion. Complete and sustained inhibition of Chk1 kinase was necessary to activate a robust γH2AX induction and growth inhibition. Chk1 inhibitor cytotoxicity correlated with induction of DNA damage with cells undergoing apoptosis, mitotic slippage and DNA damage-induced permanent cell cycle arrest. We identified two distinct classes of Chk1 inhibitors: those that induced a strong increase in γH2AX, pChk1 (S317) and pRPA32 (S4/S8) (including V158411, LY2603618 and ARRY-1A) and those that did not (including MK-8776 and GNE-900). Tumor cell death, induced through increased DNA damage, coupled with abrogation of cell cycle checkpoints makes selective inhibitors of Chk1 a potentially useful therapeutic treatment for multiple human cancers.
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19
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A newly synthesized Ligustrazine stilbene derivative inhibits PDGF-BB induced vascular smooth muscle cell phenotypic switch and proliferation via delaying cell cycle progression. Eur J Pharmacol 2017; 814:106-113. [DOI: 10.1016/j.ejphar.2017.08.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 08/06/2017] [Accepted: 08/09/2017] [Indexed: 11/19/2022]
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20
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Cornella N, Tebaldi T, Gasperini L, Singh J, Padgett RA, Rossi A, Macchi P. The hnRNP RALY regulates transcription and cell proliferation by modulating the expression of specific factors including the proliferation marker E2F1. J Biol Chem 2017; 292:19674-19692. [PMID: 28972179 DOI: 10.1074/jbc.m117.795591] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 09/18/2017] [Indexed: 12/31/2022] Open
Abstract
The heterogeneous nuclear ribonucleoproteins (hnRNP) form a large family of RNA-binding proteins that exert numerous functions in RNA metabolism. RALY is a member of the hnRNP family that binds poly-U-rich elements within several RNAs and regulates the expression of specific transcripts. RALY is up-regulated in different types of cancer, and its down-regulation impairs cell cycle progression. However, the RALY's role in regulating RNA levels remains elusive. Here, we show that numerous genes coding for factors involved in transcription and cell cycle regulation exhibit an altered expression in RALY-down-regulated HeLa cells, consequently causing impairments in transcription, cell proliferation, and cell cycle progression. Interestingly, by comparing the list of RALY targets with the list of genes affected by RALY down-regulation, we found an enrichment of RALY mRNA targets in the down-regulated genes upon RALY silencing. The affected genes include the E2F transcription factor family. Given its role as proliferation-promoting transcription factor, we focused on E2F1. We demonstrate that E2F1 mRNA stability and E2F1 protein levels are reduced in cells lacking RALY expression. Finally, we also show that RALY interacts with transcriptionally active chromatin in both an RNA-dependent and -independent manner and that this association is abolished in the absence of active transcription. Taken together, our results highlight the importance of RALY as an indirect regulator of transcription and cell cycle progression through the regulation of specific mRNA targets, thus strengthening the possibility of a direct gene expression regulation exerted by RALY.
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Affiliation(s)
- Nicola Cornella
- From the Laboratory of Molecular and Cellular Neurobiology, Centre for Integrative Biology, University of Trento, via Sommarive 9, 38123 Trento, Italy
| | - Toma Tebaldi
- the Laboratory of Translational Genomics, Centre for Integrative Biology, University of Trento, via Sommarive 9, 38123 Trento, Italy
| | - Lisa Gasperini
- From the Laboratory of Molecular and Cellular Neurobiology, Centre for Integrative Biology, University of Trento, via Sommarive 9, 38123 Trento, Italy
| | | | | | - Annalisa Rossi
- From the Laboratory of Molecular and Cellular Neurobiology, Centre for Integrative Biology, University of Trento, via Sommarive 9, 38123 Trento, Italy,
| | - Paolo Macchi
- From the Laboratory of Molecular and Cellular Neurobiology, Centre for Integrative Biology, University of Trento, via Sommarive 9, 38123 Trento, Italy,
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21
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Majellaro M, Stefanachi A, Tardia P, Vicenti C, Boccarelli A, Pannunzio A, Campanella F, Coluccia M, Denora N, Leonetti F, de Candia M, Altomare CD, Cellamare S. Investigating Structural Requirements for the Antiproliferative Activity of Biphenyl Nicotinamides. ChemMedChem 2017; 12:1380-1389. [PMID: 28665505 DOI: 10.1002/cmdc.201700365] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Indexed: 11/09/2022]
Abstract
A number of trimethoxybenzoic acid anilides, previously studied as permeability glycoprotein (P-gp) modulators, were screened with the aim of identifying new anticancer agents. One of these compounds, which showed antiproliferative activity against resistant MCF-7 cell line, was selected as the hit structure. Replacement of the trimethoxybenzoyl moiety with a nicotinoyl group, in order to overcome solubility issues, led to a new series of N-biphenyl nicotinoyl anilides, among which a nitro derivative, N-(3',5'-difluoro-3-nitro-[1,1'-biphenyl]-4-yl)nicotinamide (3), displayed antiproliferative activity against MCF-7 and MDA-MB-231 cells in the nanomolar range. The search for a bioisostere of the nitro group led to nitrile analogue N-(3-cyano-4'-fluoro-[1,1'-biphenyl]-4-yl)nicotinamide (36), which shows a strong increase in activity against MCF-7 and MDA-MB-231 cells. Compound 36 induced a dose-dependent accumulation of G2 - and M-phase MCF-7 cell populations, and a decrease in S-phase cells. Relative to vinblastine, a well-known potent antimitotic agent, compound 36 also induced G1 -phase arrest at low doses (20-40 nm), but did not inhibit in vitro tubulin polymerization.
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Affiliation(s)
- Maria Majellaro
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
| | - Angela Stefanachi
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
| | - Piero Tardia
- D3-Drug Discovery and Development Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Chiara Vicenti
- Department of Emergency and Organ Transplantation, Section of Pathological Anatomy, University of Bari, Piazza Giulio Cesare 11, 70124, Bari, Italy
| | - Angelina Boccarelli
- Department of Biomedical Sciences and Human Oncology, University of Bari, Piazza Giulio Cesare 11, 70124, Bari, Italy
| | - Alessandra Pannunzio
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
| | - Federica Campanella
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
| | - Mauro Coluccia
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
| | - Nunzio Denora
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
| | - Francesco Leonetti
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
| | - Modesto de Candia
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
| | | | - Saverio Cellamare
- Department of Pharmacy-Drug Sciences, University of Bari, Via Orabona 4, 70125, Bari, Italy
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22
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Liu X, Chen X, Zhu Y, Wang K, Wang Y. Effect of magnolol on cerebral injury and blood brain barrier dysfunction induced by ischemia-reperfusion in vivo and in vitro. Metab Brain Dis 2017; 32:1109-1118. [PMID: 28378105 DOI: 10.1007/s11011-017-0004-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 03/27/2017] [Indexed: 10/19/2022]
Abstract
Magnolol, a neolignan compound isolated from traditional Chinese medicine Magnolia officinalis, has a potentially therapeutic influence on ischemic stroke. Previous studies have demonstrated that cerebral ischemia-reperfusion (I-R) and blood-brain barrier (BBB) are involved in the pathogeneses of stroke. Therefore, in vivo and in vitro studies were designed to investigate the effects of magnolol on I-R-induced neural injury and BBB dysfunction. In cerebral I-R model of mice, cerebral infarct volumes, brain water content, and the exudation of Evans blue were significantly reduced by intravenous injection with magnolol at the doses of 1.4, 7.0, and 35.0 μg/kg. When primary cultured microglial cells were treated with 1 μg/ml lipopolysaccharide (LPS) plus increasing concentrations of magnolol, ranging from 0.01 to 10 μmol/L, magnolol could statistically inhibit LPS-induced NO release, TNF-α secretion, and expression of p65 subunit of NF-κB in the nucleus of microglial cells. In the media of brain microvascular endothelial cells (BMECs), oxygen and glucose deprivation-reperfusion (OGD-R) could remarkably lead to the elevation of TNF-α and IL-1β levels, while magnolol evidently reversed these effects. In BBB model in vitro, magnolol dose- and time-dependently declined BBB hyperpermeability induced by oxygen and glucose deprivation (OGD), OGD-R, and ephrin-A1 treatment. More importantly, magnolol could obviously inhibit phosphorylation of EphA2 (p-EphA2) not only in ephrin-A1-treated BMECs but also in cerebral I-R model of mice. In contrast to p-EphA2, magnolol significantly increased ZO-1 and occludin levels in BMECs subjected to OGD. Taken together, magnolol can protect neural damage from cerebral ischemia- and OGD-reperfusion, which may be associated with suppressing cerebral inflammation and improving BBB function.
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Affiliation(s)
- Xiaoyan Liu
- Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Xiaoling Chen
- Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Yuanjun Zhu
- Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Kewei Wang
- Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Yinye Wang
- Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China.
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23
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Pereira PD, Serra-Caetano A, Cabrita M, Bekman E, Braga J, Rino J, Santus R, Filipe PL, Sousa AE, Ferreira JA. Quantification of cell cycle kinetics by EdU (5-ethynyl-2'-deoxyuridine)-coupled-fluorescence-intensity analysis. Oncotarget 2017; 8:40514-40532. [PMID: 28465489 PMCID: PMC5522303 DOI: 10.18632/oncotarget.17121] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 04/03/2017] [Indexed: 01/05/2023] Open
Abstract
We propose a novel single-deoxynucleoside-based assay that is easy to perform and provides accurate values for the absolute length (in units of time) of each of the cell cycle stages (G1, S and G2/M). This flow-cytometric assay takes advantage of the excellent stoichiometric properties of azide-fluorochrome detection of DNA substituted with 5-ethynyl-2'-deoxyuridine (EdU). We show that by pulsing cells with EdU for incremental periods of time maximal EdU-coupled fluorescence is reached when pulsing times match the length of S phase. These pulsing times, allowing labelling for a full S phase of a fraction of cells in asynchronous populations, provide accurate values for the absolute length of S phase. We characterized additional, lower intensity signals that allowed quantification of the absolute durations of G1 and G2 phases.Importantly, using this novel assay data on the lengths of G1, S and G2/M phases are obtained in parallel. Therefore, these parameters can be estimated within a time frame that is shorter than a full cell cycle. This method, which we designate as EdU-Coupled Fluorescence Intensity (E-CFI) analysis, was successfully applied to cell types with distinctive cell cycle features and shows excellent agreement with established methodologies for analysis of cell cycle kinetics.
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Affiliation(s)
- Pedro D. Pereira
- Instituto de Medicina Molecular, Faculdade Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Ana Serra-Caetano
- Instituto de Medicina Molecular, Faculdade Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Marisa Cabrita
- Kennedy Institute of Rheumatology, University of Oxford, OX3 7FY Oxford, United Kingdom
| | - Evguenia Bekman
- Instituto de Medicina Molecular, Faculdade Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - José Braga
- Instituto de Medicina Molecular, Faculdade Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - José Rino
- Instituto de Medicina Molecular, Faculdade Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Renè Santus
- Muséum National d´Histoire Naturelle, Département RDDM, 75231 Paris, France
| | - Paulo L. Filipe
- Instituto de Medicina Molecular, Faculdade Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Ana E. Sousa
- Instituto de Medicina Molecular, Faculdade Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - João A. Ferreira
- Instituto de Medicina Molecular, Faculdade Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
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24
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Gul S. Epigenetic assays for chemical biology and drug discovery. Clin Epigenetics 2017; 9:41. [PMID: 28439316 PMCID: PMC5399855 DOI: 10.1186/s13148-017-0342-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 04/12/2017] [Indexed: 12/27/2022] Open
Abstract
The implication of epigenetic abnormalities in many diseases and the approval of a number of compounds that modulate specific epigenetic targets in a therapeutically relevant manner in cancer specifically confirms that some of these targets are druggable by small molecules. Furthermore, a number of compounds are currently in clinical trials for other diseases including cardiovascular, neurological and metabolic disorders. Despite these advances, the approved treatments for cancer only extend progression-free survival for a relatively short time and being associated with significant side effects. The current clinical trials involving the next generation of epigenetic drugs may address the disadvantages of the currently approved epigenetic drugs. The identification of chemical starting points of many drugs often makes use of screening in vitro assays against libraries of synthetic or natural products. These assays can be biochemical (using purified protein) or cell-based (using for example, genetically modified, cancer cell lines or primary cells) and performed in microtiter plates, thus enabling a large number of samples to be tested. A considerable number of such assays are available to monitor epigenetic target activity, and this review provides an overview of drug discovery and chemical biology and describes assays that monitor activities of histone deacetylase, lysine-specific demethylase, histone methyltransferase, histone acetyltransferase and bromodomain. It is of critical importance that an appropriate assay is developed and comprehensively validated for a given drug target prior to screening in order to improve the probability of the compound progressing in the drug discovery value chain.
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Affiliation(s)
- Sheraz Gul
- Fraunhofer Institute for Molecular Biology and Applied Ecology - ScreeningPort, Schnackenburgallee 114, 22525 Hamburg, Germany
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25
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Alsehli H, Gari M, Abuzinadah M, Abuzenadah A. The emerging importance of high content screening for future therapeutics. J Microsc Ultrastruct 2017. [DOI: 10.1016/j.jmau.2017.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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26
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Massey AJ. Modification of tumour cell metabolism modulates sensitivity to Chk1 inhibitor-induced DNA damage. Sci Rep 2017; 7:40778. [PMID: 28106079 PMCID: PMC5247758 DOI: 10.1038/srep40778] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 12/05/2016] [Indexed: 01/10/2023] Open
Abstract
Chk1 kinase inhibitors are currently under clinical investigation as potentiators of cytotoxic chemotherapy and demonstrate potent activity in combination with anti-metabolite drugs that increase replication stress through the inhibition of nucleotide or deoxyribonucleotide biosynthesis. Inhibiting other metabolic pathways critical for the supply of building blocks necessary to support DNA replication may lead to increased DNA damage and synergy with an inhibitor of Chk1. A screen of small molecule metabolism modulators identified combinatorial activity between a Chk1 inhibitor and chloroquine or the LDHA/LDHB inhibitor GSK 2837808A. Compounds, such as 2-deoxyglucose or 6-aminonicotinamide, that reduced the fraction of cells undergoing active replication rendered tumour cells more resistant to Chk1 inhibitor-induced DNA damage. Withdrawal of glucose or glutamine induced G1 and G2/M arrest without increasing DNA damage and reduced Chk1 expression and activation through autophosphorylation. This suggests the expression and activation of Chk1 kinase is associated with cells undergoing active DNA replication. Glutamine starvation rendered tumour cells more resistant to Chk1 inhibitor-induced DNA damage and reversal of the glutamine starvation restored the sensitivity of tumour cells to Chk1 inhibitor-induced DNA damage. Chk1 inhibitors may be a potentially useful therapeutic treatment for patients whose tumours contain a high fraction of replicating cells.
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27
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Massey AJ. Tumour growth environment modulates Chk1 signalling pathways and Chk1 inhibitor sensitivity. Sci Rep 2016; 6:35874. [PMID: 27775084 PMCID: PMC5075878 DOI: 10.1038/srep35874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 10/07/2016] [Indexed: 01/13/2023] Open
Abstract
Clinical development of Chk1 inhibitors is currently focussed on evaluating activity as monotherapy and as potentiators of chemotherapy. To aid translation of pre-clinical studies, we sought to understand the effects of the tumour growth environment on Chk1 signalling and sensitivity to small molecule Chk1 inhibition. Spheroid culture altered Chk1 signalling to a more xenograft like state but decreased sensitivity to Chk1 inhibition. Growth in low serum did not alter DDR signalling but increased the sensitivity of A2058 and U2OS tumour cells to Chk1 inhibition. An analysis of the expression levels of replication associated proteins identified a correlation between Cdc6 and pChk1 (S296) as well as total Chk1 in xenograft derived samples and between Cdc6 and total Chk1 in anchorage-dependent growth derived protein samples. No apparent correlation between Chk1 or Cdc6 expression and sensitivity to Chk1 inhibition in vitro was observed. A database analysis revealed upregulation of CDC6 mRNA expression in tumour compared to normal tissue and a correlation between CDC6 and CHEK1 mRNA expression in human cancers. We suggest that Cdc6 overexpression in human tumours requires a concomitant increase in Chk1 to counterbalance the deleterious effects of origin hyperactivation-induced DNA damage.
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28
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Persson M, Hornberg JJ. Advances in Predictive Toxicology for Discovery Safety through High Content Screening. Chem Res Toxicol 2016; 29:1998-2007. [DOI: 10.1021/acs.chemrestox.6b00248] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Mikael Persson
- Drug Safety and Metabolism, Innovative Medicines and Early Development, AstraZeneca R&D Gothenburg, Pepparedsleden 1, 431 83 Mölndal, Sweden
| | - Jorrit J. Hornberg
- Drug Safety and Metabolism, Innovative Medicines and Early Development, AstraZeneca R&D Gothenburg, Pepparedsleden 1, 431 83 Mölndal, Sweden
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29
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Werle SB, Chagastelles P, Pranke P, Casagrande L. The effects of hypoxia on in vitro culture of dental-derived stem cells. Arch Oral Biol 2016; 68:13-20. [DOI: 10.1016/j.archoralbio.2016.03.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 03/18/2016] [Accepted: 03/20/2016] [Indexed: 12/19/2022]
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30
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Aguirre AJ, Meyers RM, Weir BA, Vazquez F, Zhang CZ, Ben-David U, Cook A, Ha G, Harrington WF, Doshi MB, Kost-Alimova M, Gill S, Xu H, Ali LD, Jiang G, Pantel S, Lee Y, Goodale A, Cherniack AD, Oh C, Kryukov G, Cowley GS, Garraway LA, Stegmaier K, Roberts CW, Golub TR, Meyerson M, Root DE, Tsherniak A, Hahn WC. Genomic Copy Number Dictates a Gene-Independent Cell Response to CRISPR/Cas9 Targeting. Cancer Discov 2016; 6:914-29. [PMID: 27260156 PMCID: PMC4972686 DOI: 10.1158/2159-8290.cd-16-0154] [Citation(s) in RCA: 371] [Impact Index Per Article: 46.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 05/31/2016] [Indexed: 01/01/2023]
Abstract
UNLABELLED The CRISPR/Cas9 system enables genome editing and somatic cell genetic screens in mammalian cells. We performed genome-scale loss-of-function screens in 33 cancer cell lines to identify genes essential for proliferation/survival and found a strong correlation between increased gene copy number and decreased cell viability after genome editing. Within regions of copy-number gain, CRISPR/Cas9 targeting of both expressed and unexpressed genes, as well as intergenic loci, led to significantly decreased cell proliferation through induction of a G2 cell-cycle arrest. By examining single-guide RNAs that map to multiple genomic sites, we found that this cell response to CRISPR/Cas9 editing correlated strongly with the number of target loci. These observations indicate that genome targeting by CRISPR/Cas9 elicits a gene-independent antiproliferative cell response. This effect has important practical implications for the interpretation of CRISPR/Cas9 screening data and confounds the use of this technology for the identification of essential genes in amplified regions. SIGNIFICANCE We found that the number of CRISPR/Cas9-induced DNA breaks dictates a gene-independent antiproliferative response in cells. These observations have practical implications for using CRISPR/Cas9 to interrogate cancer gene function and illustrate that cancer cells are highly sensitive to site-specific DNA damage, which may provide a path to novel therapeutic strategies. Cancer Discov; 6(8); 914-29. ©2016 AACR.See related commentary by Sheel and Xue, p. 824See related article by Munoz et al., p. 900This article is highlighted in the In This Issue feature, p. 803.
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Affiliation(s)
- Andrew J Aguirre
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts. Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts. Harvard Medical School, Boston, Massachusetts
| | - Robin M Meyers
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Barbara A Weir
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Francisca Vazquez
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Cheng-Zhong Zhang
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Uri Ben-David
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - April Cook
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Gavin Ha
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | | | - Mihir B Doshi
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | | | - Stanley Gill
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Han Xu
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Levi D Ali
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Guozhi Jiang
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Sasha Pantel
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Yenarae Lee
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Amy Goodale
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | | | - Coyin Oh
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Gregory Kryukov
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Glenn S Cowley
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Levi A Garraway
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts. Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts. Harvard Medical School, Boston, Massachusetts. Howard Hughes Medical Institute, Chevy Chase, Maryland
| | - Kimberly Stegmaier
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts. Harvard Medical School, Boston, Massachusetts. Boston Children's Hospital, Boston, Massachusetts
| | - Charles W Roberts
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts. St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Todd R Golub
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts. Harvard Medical School, Boston, Massachusetts. Howard Hughes Medical Institute, Chevy Chase, Maryland
| | - Matthew Meyerson
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts. Harvard Medical School, Boston, Massachusetts. Department of Pathology, Harvard Medical School, Boston, Massachusetts. Center for Cancer Genome Discovery, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - David E Root
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Aviad Tsherniak
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts.
| | - William C Hahn
- Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and MIT, Cambridge, Massachusetts. Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts. Harvard Medical School, Boston, Massachusetts. Center for Cancer Genome Discovery, Dana-Farber Cancer Institute, Boston, Massachusetts.
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31
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Bennett NK, Dhaliwal A, Moghe PV. Convergence of Highly Resolved and Rapid Screening Platforms with Dynamically Engineered, Cell Phenotype-Prescriptive Biomaterials. ACTA ACUST UNITED AC 2016; 2:142-151. [PMID: 27482508 DOI: 10.1007/s40495-016-0057-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Biophysical and biochemical cues from the cellular microenvironment initiate intracellular signaling through cellular membrane receptors and trigger specific cell developmental programs. Extracellular substrates and matrix scaffolds engineered to mimic cell's native physiological environment must incorporate the multifactorial parameters (composition, micro and nanoscale organization and topography) of the extracellular matrix as well as the dynamic nature of the matrix. The design of such engineered biomaterials is challenged by the inherent complexity and dynamic nature of the cell-extracellular matrix reciprocity, while the validation of robust microenvironments requires a deeper, higher content phenotypic resolution of cell-matrix interactions alongside a rapid screening capability. To this end, high-throughput platforms are integral to facilitating the screening and optimization of complex engineered microenvironments for directing desired cell developmental pathway. This review highlights the recent advances in biomaterial platforms that present dynamic cues and enable high throughput screening of cell's response to a combination of micro-environmental factors. We also address some newer techniques involving high content image informatics to elucidate emergent cellular behaviors with a focus on stem cell regenerative endpoints.
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Affiliation(s)
- Neal K Bennett
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ
| | - Anandika Dhaliwal
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ
| | - Prabhas V Moghe
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ; Department of Chemical and Biochemical Engineering, Rutgers University, Piscataway, NJ
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32
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PPIP5K1 interacts with the exocyst complex through a C-terminal intrinsically disordered domain and regulates cell motility. Cell Signal 2016; 28:401-411. [PMID: 26854614 DOI: 10.1016/j.cellsig.2016.02.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/01/2016] [Accepted: 02/02/2016] [Indexed: 11/24/2022]
Abstract
Cellular signaling involves coordinated regulation of many events. Scaffolding proteins are crucial regulators of cellular signaling, because they are able to affect numerous events by coordinating specific interactions among multiple protein partners in the same pathway. Scaffolding proteins often contain intrinsically disordered regions (IDR) that facilitate the formation and function of distinct protein complexes. We show that PPIP5K1 contains an unusually long and evolutionarily conserved IDR. To investigate the biological role(s) of this domain, we identified interacting proteins using affinity purification coupled with mass spectrometry. Here, we report that PPIP5K1 is associated with a network of proteins that regulate vesicle-mediated transport. We further identified exocyst complex component 1 as a direct interactor with the IDR of PPIP5K1. Additionally, we report that knockdown of PPIP5K1 decreases motility of HeLa cells in a wound-healing assay. These results suggest that PPIP5K1 might play an important role in regulating function of exocyst complex in establishing cellular polarity and directional migration of cells.
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