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Leone S, Srivastava A, Herrero-Ruiz A, Hummel B, Tittel L, Campalastri R, Aprile-Garcia F, Tan JH, Rawat P, Andersson P, Willis AE, Sawarkar R. HSP70 binds to specific non-coding RNA and regulates human RNA polymerase III. Mol Cell 2024; 84:687-701.e7. [PMID: 38266641 DOI: 10.1016/j.molcel.2024.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 10/20/2023] [Accepted: 01/02/2024] [Indexed: 01/26/2024]
Abstract
Molecular chaperones are critical for protein homeostasis and are implicated in several human pathologies such as neurodegeneration and cancer. While the binding of chaperones to nascent and misfolded proteins has been studied in great detail, the direct interaction between chaperones and RNA has not been systematically investigated. Here, we provide the evidence for widespread interaction between chaperones and RNA in human cells. We show that the major chaperone heat shock protein 70 (HSP70) binds to non-coding RNA transcribed by RNA polymerase III (RNA Pol III) such as tRNA and 5S rRNA. Global chromatin profiling revealed that HSP70 binds genomic sites of transcription by RNA Pol III. Detailed biochemical analyses showed that HSP70 alleviates the inhibitory effect of cognate tRNA transcript on tRNA gene transcription. Thus, our study uncovers an unexpected role of HSP70-RNA interaction in the biogenesis of a specific class of non-coding RNA with wider implications in cancer therapeutics.
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Affiliation(s)
- Sergio Leone
- MRC Toxicology Unit, University of Cambridge, Cambridge CB21QR, UK.
| | | | | | - Barbara Hummel
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg 79108, Germany
| | - Lena Tittel
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg 79108, Germany
| | | | | | - Jun Hao Tan
- MRC Toxicology Unit, University of Cambridge, Cambridge CB21QR, UK
| | - Prashant Rawat
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg 79108, Germany
| | - Patrik Andersson
- Safety Innovation, Clinical Pharmacology and Safety Sciences, AstraZeneca R&D, Gothenburg 43183, Sweden
| | - Anne E Willis
- MRC Toxicology Unit, University of Cambridge, Cambridge CB21QR, UK
| | - Ritwick Sawarkar
- MRC Toxicology Unit, University of Cambridge, Cambridge CB21QR, UK; Max Planck Institute of Immunobiology and Epigenetics, Freiburg 79108, Germany.
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2
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Zhang G, Li M, Tang Q, Meng F, Feng P, Chen W. MulCNN-HSP: A multi-scale convolutional neural networks-based deep learning method for classification of heat shock proteins. Int J Biol Macromol 2024; 257:128802. [PMID: 38101670 DOI: 10.1016/j.ijbiomac.2023.128802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/04/2023] [Accepted: 12/12/2023] [Indexed: 12/17/2023]
Abstract
Heat shock proteins (HSPs) are crucial cellular stress proteins that react to environmental cues, ensuring the preservation of cellular functions. They also play pivotal roles in orchestrating the immune response and participating in processes associated with cancer. Consequently, the classification of HSPs holds immense significance in enhancing our understanding of their biological functions and in various diseases. However, the use of computational methods for identifying and classifying HSPs still faces challenges related to accuracy and interpretability. In this study, we introduced MulCNN-HSP, a novel deep learning model based on multi-scale convolutional neural networks, for identifying and classifying of HSPs. Comparative results showed that MulCNN-HSP outperforms or matches existing models in the identification and classification of HSPs. Furthermore, MulCNN-HSP can extract and analyze essential features for the prediction task, enhancing its interpretability. To facilitate its accessibility, we have made MulCNN-HSP available at http://cbcb.cdutcm.edu.cn/HSP/. We hope that MulCNN-HSP will contribute to advancing the study of HSPs and their roles in various biological processes and diseases.
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Affiliation(s)
- Guiyang Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Mingrui Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Qiang Tang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Fanbo Meng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Pengmian Feng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Wei Chen
- State Key Laboratory of Southwestern Chinese Medicine Resources, Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
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3
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Kozeko L, Kordyum E. Spatiotemporal expression patterns of cytosolic AtHSP90-2 in Arabidopsis seedlings. PLANT SIGNALING & BEHAVIOR 2023; 18:2202977. [PMID: 37071581 PMCID: PMC10114973 DOI: 10.1080/15592324.2023.2202977] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Heat shock protein AtHSP90-2 is one of the three constitutive cytosolic HSP90s of Arabidopsis thaliana, which are highly homologous and show mild expression activation in response to stressful impacts. To characterize the functioning of AtHSP90-2, we have analyzed tissue-specificity of its expression during seedling development using a DsG transgenic line carrying a loss-of-function mutation of AtHSP90-2 via translational fusions with the β-glucuronidase reporter gene (GUS). Histochemical analysis during the first two weeks of seedling growth revealed AtHSP90-2 expression in all organs, as well as differences in its intensity between tissues and showed its dynamics. The tissue-specific AtHSP90-2-GUS expression pattern was shown to be maintained under heat shock and water deficit. The most prominent GUS staining was detected in the vascular system and hydathodes of cotyledons, and stipules. The basipetal gradient of AtHSP90-2 expression during leaf formation, its dynamics in developing stipules, and the high level of its expression in cells with active transport function suggest a special role for the gene in certain cellular processes.
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Affiliation(s)
- Liudmyla Kozeko
- Department of Cell Biology and Anatomy, M.G. Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
- CONTACT Liudmyla Kozeko Department of Cell Biology and Anatomy, M.G. Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Tereshchenkivska str. 2, Kyiv01601, Ukraine
| | - Elizabeth Kordyum
- Department of Cell Biology and Anatomy, M.G. Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
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4
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Porta EO, Gao L, Denny PW, Steel PG, Kalesh K. Inhibition of HSP90 distinctively modulates the global phosphoproteome of Leishmania mexicana developmental stages. Microbiol Spectr 2023; 11:e0296023. [PMID: 37905935 PMCID: PMC10715028 DOI: 10.1128/spectrum.02960-23] [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: 07/26/2023] [Accepted: 09/26/2023] [Indexed: 11/02/2023] Open
Abstract
IMPORTANCE In the unicellular parasites Leishmania spp., the etiological agents of leishmaniasis, a complex infectious disease that affects 98 countries in 5 continents, chemical inhibition of HSP90 protein leads to differentiation from promastigote to amastigote stage. Recent studies indicate potential role for protein phosphorylation in the life cycle control of Leishmania. Also, recent studies suggest a fundamentally important role of RNA-binding proteins (RBPs) in regulating the downstream effects of the HSP90 inhibition in Leishmania. Phosphorylation-dephosphorylation dynamics of RBPs in higher eukaryotes serves as an important on/off switch to regulate RNA processing and decay in response to extracellular signals and cell cycle check points. In the current study, using a combination of highly sensitive TMT labeling-based quantitative proteomic MS and robust phosphoproteome enrichment, we show for the first time that HSP90 inhibition distinctively modulates global protein phosphorylation landscapes in the different life cycle stages of Leishmania, shedding light into a crucial role of the posttranslational modification in the differentiation of the parasite under HSP90 inhibition stress. We measured changes in phosphorylation of many RBPs and signaling proteins including protein kinases upon HSP90 inhibition in the therapeutically relevant amastigote stage. This work provides insights into the importance of HSP90-mediated protein cross-talks and regulation of phosphorylation in Leishmania, thus significantly expanding our knowledge of the posttranslational modification in Leishmania biology.
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Affiliation(s)
| | - Liqian Gao
- School of Pharmaceutical Sciences, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Paul W. Denny
- Department of Biosciences, Durham University, Durham, United Kingdom
| | - Patrick G. Steel
- Department of Chemistry, Durham University, Durham, United Kingdom
| | - Karunakaran Kalesh
- School of Health and Life Sciences,Teesside University, Middlesbrough, United Kingdom
- National Horizons Centre, Darlington, United Kingdom
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5
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Abstract
Heat shock protein 90 (HSP90) family is a class of proteins known as molecular chaperones that promote client protein folding and translocation in unstressed cells and regulate cellular homeostasis in the stress response. Noncoding RNAs (ncRNAs) are defined as RNAs that do not encode proteins. Previous studies have shown that ncRNAs are key regulators of multiple fundamental cellular processes, such as development, differentiation, proliferation, transcription, post-transcriptional modifications, apoptosis, and cell metabolism. It is known that ncRNAs do not act alone but function via the interactions with other molecules, including co-chaperones, RNAs, DNAs, and so on. As a kind of molecular chaperone, HSP90 is also involved in many biological procedures of ncRNAs. In this review, we systematically analyze the impact of HSP90 on various kinds of ncRNAs, including their synthesis and function, and how ncRNAs influence HSP90 directly and indirectly.
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Affiliation(s)
- Qing Xu
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, China
- National Medicine Functional Experimental Teaching Center, Changsha, China
| | - Haoduo Qiao
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, China
- National Medicine Functional Experimental Teaching Center, Changsha, China
| | - Yunfei Xu
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, China
- National Medicine Functional Experimental Teaching Center, Changsha, China
| | - Yao Zhao
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, China
- National Medicine Functional Experimental Teaching Center, Changsha, China
| | - Nina He
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, China
- National Medicine Functional Experimental Teaching Center, Changsha, China
| | - Jie Zhao
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, China
- National Medicine Functional Experimental Teaching Center, Changsha, China
| | - Ying Liu
- Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
- Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, China
- National Medicine Functional Experimental Teaching Center, Changsha, China
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6
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Sabarís G, Fitz‐James MH, Cavalli G. Epigenetic inheritance in adaptive evolution. Ann N Y Acad Sci 2023. [DOI: 10.1111/nyas.14992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Affiliation(s)
- Gonzalo Sabarís
- Institute of Human Genetics, CNRS Montpellier France
- University of Montpellier Montpellier France
| | - Maximilian H. Fitz‐James
- Institute of Human Genetics, CNRS Montpellier France
- University of Montpellier Montpellier France
| | - Giacomo Cavalli
- Institute of Human Genetics, CNRS Montpellier France
- University of Montpellier Montpellier France
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7
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Holton KM, Giadone RM, Lang BJ, Calderwood SK. A Workflow Guide to RNA-Seq Analysis of Chaperone Function and Beyond. Methods Mol Biol 2023; 2693:39-60. [PMID: 37540425 DOI: 10.1007/978-1-0716-3342-7_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
RNA sequencing (RNA-seq) is a powerful method of transcriptional analysis that allows for the sequence identification and quantification of cellular transcripts. RNA-seq can be used for differential gene expression (DGE) analysis, gene fusion detection, allele-specific expression, isoform and splice variant quantification, and identification of novel genes. These applications can be used for downstream systems biology analyses such as gene ontology or pathway analysis to provide insight into processes altered between biological conditions. Given the wide range of signaling pathways subject to chaperone activity as well as numerous chaperone functions in RNA metabolism, RNA-seq may provide a valuable tool for the study of chaperone proteins in biology and disease. This chapter outlines an example RNA-seq workflow to determine differentially expressed (DE) genes between two or more sample conditions and provides some considerations for RNA-seq experimental design.
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Affiliation(s)
- Kristina M Holton
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA.
- Harvard Stem Cell Institute, Cambridge, MA, USA.
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA.
| | - Richard M Giadone
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
- Harvard Stem Cell Institute, Cambridge, MA, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Benjamin J Lang
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Stuart K Calderwood
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Boston, MA, USA
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8
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Sawarkar R. Chromatin Immunoprecipitation (ChIP) of Heat Shock Protein 90 (Hsp90). Methods Mol Biol 2023; 2693:61-71. [PMID: 37540426 DOI: 10.1007/978-1-0716-3342-7_5] [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] [Indexed: 08/05/2023]
Abstract
Chromatin immunoprecipitation followed by sequencing (ChIP-seq) is a widely used technique for genome-wide mapping of protein-DNA interactions and epigenetic marks in vivo. Recent studies have suggested an important role of heat shock protein 90 (Hsp90) in chromatin. This molecular chaperone assists other proteins to acquire their mature and functional conformation and helps in the assembly of many complexes. In this chapter, we provide specific details on how to perform Hsp90 ChIP-seq from Drosophila Schneider (S2) cells. Briefly, cells are simultaneously lyzed and reversibly cross-linked to stabilize protein-DNA interactions. Chromatin is prepared from isolated nuclei and sheared by sonication. Hsp90-bound loci are immunoprecipitated and the corresponding DNA fragments are purified and sequenced. The described approach revealed that Hsp90 binds close to the transcriptional start site of around one-third of all Drosophila coding genes and characterized the role of the chaperone at chromatin.
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Affiliation(s)
- Ritwick Sawarkar
- Department of Genetics, Medical Research Council (MRC), University of Cambridge, Cambridge, UK.
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9
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Abe K, Schauer T, Torres-Padilla ME. Distinct patterns of RNA polymerase II and transcriptional elongation characterize mammalian genome activation. Cell Rep 2022; 41:111865. [PMID: 36577375 DOI: 10.1016/j.celrep.2022.111865] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 09/08/2022] [Accepted: 09/30/2022] [Indexed: 12/28/2022] Open
Abstract
How transcription is regulated as development commences is fundamental to understand how the transcriptionally silent mature gametes are reprogrammed. The embryonic genome is activated for the first time during zygotic genome activation (ZGA). How RNA polymerase II (Pol II) and productive elongation are regulated during this process remains elusive. Here, we generate genome-wide maps of Serine 5 and Serine 2-phosphorylated Pol II during and after ZGA in mouse embryos. We find that both phosphorylated Pol II forms display similar distributions across genes during ZGA, with typical elongation enrichment of Pol II emerging after ZGA. Serine 2-phosphorylated Pol II occurs at genes prior to their activation, suggesting that Serine 2 phosphorylation may prime gene expression. Functional perturbations demonstrate that CDK9 and SPT5 are major ZGA regulators and that SPT5 prevents precocious activation of some genes. Overall, our work sheds molecular insights into transcriptional regulation at the beginning of mammalian development.
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Affiliation(s)
- Kenichiro Abe
- Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, 81377 München, Germany
| | - Tamas Schauer
- Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, 81377 München, Germany; Bioinformatics Unit, Biomedical Center, Ludwig-Maximilians-University, 82152 Planegg-Martinsried, Germany
| | - Maria-Elena Torres-Padilla
- Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, 81377 München, Germany; Faculty of Biology, Ludwig-Maximilians Universität, München, Germany.
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10
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Fangaria N, Rani K, Singh P, Dey S, Kumar KA, Bhattacharyya S. DNA damage-induced nuclear import of HSP90α is promoted by Aha1. Mol Biol Cell 2022; 33:ar140. [PMID: 36260391 PMCID: PMC9727810 DOI: 10.1091/mbc.e21-11-0554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The interplay between yHSP90α (Hsp82) and Rad51 has been implicated in the DNA double-strand break repair (DSB) pathway in yeast. Here we report that nuclear translocation of yHSP90α and its recruitment to the DSB end are essential for homologous recombination (HR)-mediated DNA repair in yeast. The HsHSP90α possesses an amino-terminal extension which is phosphorylated upon DNA damage. We find that the absence of the amino-terminal extension in yHSP90α does not compromise its nuclear import, and the nonphosphorylatable-mutant HsHSP90αT7A could be imported to the yeast nucleus upon DNA damage. Interestingly, the flexible charged-linker (CL) domains of both yHSP90α and HsHSP90α play a critical role during their nuclear translocation. The conformational restricted CL mutant yHSP90α∆(211-259), but not a shorter deletion version yHSP90α∆(211-242), fails to reach the nucleus. As the CL domain of yHSP90α is critical for its interaction with Aha1, we investigated whether Aha1 promotes the nuclear import of yHSP90α. We found that the nuclear import of yHSP90α is severely affected in ∆aha1 strain. Moreover, Aha1 is accumulated in the nucleus during DNA damage. Hence Aha1 may serve as a potential target for inhibiting nuclear function of yHSP90α. The increased sensitivity of ∆aha1 strain to genotoxic agents strengthens this notion.
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Affiliation(s)
- Nupur Fangaria
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Khushboo Rani
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Priyanka Singh
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Sandeep Dey
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Kota Arun Kumar
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Sunanda Bhattacharyya
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500046, Telangana, India,*Address correspondence to: Sunanda Bhattacharyya (; )
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11
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Translational reprogramming in response to accumulating stressors ensures critical threshold levels of Hsp90 for mammalian life. Nat Commun 2022; 13:6271. [PMID: 36270993 PMCID: PMC9587034 DOI: 10.1038/s41467-022-33916-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 10/07/2022] [Indexed: 12/25/2022] Open
Abstract
The cytosolic molecular chaperone Hsp90 is essential for eukaryotic life. Although reduced Hsp90 levels correlate with aging, it was unknown whether eukaryotic cells and organisms can tune the basal Hsp90 levels to alleviate physiologically accumulated stress. We have investigated whether and how mice adapt to the deletion of three out of four alleles of the two genes encoding cytosolic Hsp90, with one Hsp90β allele being the only remaining one. While the vast majority of such mouse embryos die during gestation, survivors apparently manage to increase their Hsp90β protein to at least wild-type levels. Our studies reveal an internal ribosome entry site in the 5' untranslated region of the Hsp90β mRNA allowing translational reprogramming to compensate for the genetic loss of Hsp90 alleles and in response to stress. We find that the minimum amount of total Hsp90 required to support viability of mammalian cells and organisms is 50-70% of what is normally there. Those that fail to maintain a threshold level are subject to accelerated senescence, proteostatic collapse, and ultimately death. Therefore, considering that Hsp90 levels can be reduced ≥100-fold in the unicellular budding yeast, critical threshold levels of Hsp90 have markedly increased during eukaryotic evolution.
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12
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Stekelenburg C, Blouin JL, Santoni F, Zaghloul N, O'Hare EA, Dusaulcy R, Maechler P, Schwitzgebel VM. Loss of Nexmif results in the expression of phenotypic variability and loss of genomic integrity. Sci Rep 2022; 12:13815. [PMID: 35970867 PMCID: PMC9378738 DOI: 10.1038/s41598-022-17845-1] [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: 10/13/2021] [Accepted: 08/02/2022] [Indexed: 11/17/2022] Open
Abstract
We identified two NEXMIF variants in two unrelated individuals with non-autoimmune diabetes and autistic traits, and investigated the expression of Nexmif in mouse and human pancreas and its function in pancreatic beta cells in vitro and in vivo. In insulin-secreting INS-1E cells, Nexmif expression increased strongly in response to oxidative stress. CRISPR Cas9-generated Nexmif knockout mice exhibited a reduced number of proliferating beta cells in pancreatic islets. RNA sequencing of pancreatic islets showed that the downregulated genes in Nexmif mutant islets are involved in stress response and the deposition of epigenetic marks. They include H3f3b, encoding histone H3.3, which is associated with the regulation of beta-cell proliferation and maintains genomic integrity by silencing transposable elements, particularly LINE1 elements. LINE1 activity has been associated with autism and neurodevelopmental disorders in which patients share characteristics with NEXMIF patients, and can cause genomic instability and genetic variation through retrotransposition. Nexmif knockout mice exhibited various other phenotypes. Mortality and phenotypic abnormalities increased in each generation in both Nexmif mutant and non-mutant littermates. In Nexmif mutant mice, LINE1 element expression was upregulated in the pancreas, brain, and testis, possibly inducing genomic instability in Nexmif mutant mice and causing phenotypic variability in their progeny.
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Affiliation(s)
- Caroline Stekelenburg
- Pediatric Endocrine and Diabetes Unit, Division of Development and Growth, Department of Pediatrics, Gynecology and Obstetrics, University Hospitals of Geneva, Children's University Hospital, 6, Rue Willy Donze, 1205, Geneva, Switzerland.,Faculty Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Jean-Louis Blouin
- Department of Genetic Medicine and Laboratory, University Hospitals of Geneva, 1211, Geneva, Switzerland.,Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, 1211, Geneva, Switzerland
| | - Federico Santoni
- Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, 1211, Geneva, Switzerland
| | - Norann Zaghloul
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, USA
| | - Elisabeth A O'Hare
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, USA
| | - Rodolphe Dusaulcy
- Pediatric Endocrine and Diabetes Unit, Division of Development and Growth, Department of Pediatrics, Gynecology and Obstetrics, University Hospitals of Geneva, Children's University Hospital, 6, Rue Willy Donze, 1205, Geneva, Switzerland.,Faculty Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Pierre Maechler
- Faculty Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Department of Cell Physiology and Metabolism, University of Geneva Medical Center, 1206, Geneva, Switzerland
| | - Valerie M Schwitzgebel
- Pediatric Endocrine and Diabetes Unit, Division of Development and Growth, Department of Pediatrics, Gynecology and Obstetrics, University Hospitals of Geneva, Children's University Hospital, 6, Rue Willy Donze, 1205, Geneva, Switzerland. .,Faculty Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
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13
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Sawarkar R. Transcriptional lockdown during acute proteotoxic stress. Trends Biochem Sci 2022; 47:660-672. [PMID: 35487807 PMCID: PMC9041648 DOI: 10.1016/j.tibs.2022.03.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 03/20/2022] [Accepted: 03/31/2022] [Indexed: 12/02/2022]
Abstract
Cells experiencing proteotoxic stress downregulate the expression of thousands of active genes and upregulate a few stress-response genes. The strategy of downregulating gene expression has conceptual parallels with general lockdown in the global response to the coronavirus disease 2019 (COVID-19) pandemic. The mechanistic details of global transcriptional downregulation of genes, termed stress-induced transcriptional attenuation (SITA), are only beginning to emerge. The reduction in RNA and protein production during stress may spare proteostasis capacity, allowing cells to divert resources to control stress-induced damage. Given the relevance of translational downregulation in a broad variety of diseases, the role of SITA in diseases caused by proteotoxicity should be investigated in future, paving the way for potential novel therapeutics.
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Affiliation(s)
- Ritwick Sawarkar
- Medical Research Council (MRC), University of Cambridge, Cambridge, UK.
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14
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Hansberg W. A critical analysis on the conception of "Pre-existent gene expression programs" for cell differentiation and development. Differentiation 2022; 125:1-8. [DOI: 10.1016/j.diff.2022.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 02/17/2022] [Accepted: 02/23/2022] [Indexed: 11/15/2022]
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15
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Human FKBP5 negatively regulates transcription through inhibition of P-TEFb complex formation. Mol Cell Biol 2021; 42:e0034421. [PMID: 34780285 DOI: 10.1128/mcb.00344-21] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Although large number of recent studies indicate strong association of FKBP5 (aka FKBP51) functions with various stress-related psychiatric disorder, the overall mechanisms are poorly understood. Beyond a few studies indicating its functions in regulating glucocorticoid receptor-, and AKT-signalling pathways, other functional roles (if any) are unclear. In this study, we report an anti-proliferative role of human FKBP5 through negative regulation of expression of proliferation-related genes. Mechanistically, we show that, owing to same region of interaction on CDK9, human FKBP5 directly competes with CyclinT1 for functional P-TEFb complex formation. In vitro biochemical coupled with cell-based assays, showed strong negative effect of FKBP5 on P-TEFb-mediated phosphorylation of diverse substrates. Consistently, FKBP5 knockdown showed enhanced P-TEFb complex formation leading to increased global RNA polymerase II CTD phosphorylation and expression of proliferation-related genes and subsequent proliferation. Thus, our results show an important role of FKBP5 in negative regulation of P-TEFb functions within mammalian cells.
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Shaheen N, Akhtar J, Umer Z, Khan MHF, Bakhtiari MH, Saleem M, Faisal A, Tariq M. Polycomb Requires Chaperonin Containing TCP-1 Subunit 7 for Maintaining Gene Silencing in Drosophila. Front Cell Dev Biol 2021; 9:727972. [PMID: 34660585 PMCID: PMC8517254 DOI: 10.3389/fcell.2021.727972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 08/30/2021] [Indexed: 11/13/2022] Open
Abstract
In metazoans, heritable states of cell type-specific gene expression patterns linked with specialization of various cell types constitute transcriptional cellular memory. Evolutionarily conserved Polycomb group (PcG) and trithorax group (trxG) proteins contribute to the transcriptional cellular memory by maintaining heritable patterns of repressed and active expression states, respectively. Although chromatin structure and modifications appear to play a fundamental role in maintenance of repression by PcG, the precise targeting mechanism and the specificity factors that bind PcG complexes to defined regions in chromosomes remain elusive. Here, we report a serendipitous discovery that uncovers an interplay between Polycomb (Pc) and chaperonin containing T-complex protein 1 (TCP-1) subunit 7 (CCT7) of TCP-1 ring complex (TRiC) chaperonin in Drosophila. CCT7 interacts with Pc at chromatin to maintain repressed states of homeotic and non-homeotic targets of PcG, which supports a strong genetic interaction observed between Pc and CCT7 mutants. Depletion of CCT7 results in dissociation of Pc from chromatin and redistribution of an abundant amount of Pc in cytoplasm. We propose that CCT7 is an important modulator of Pc, which helps Pc recruitment at chromatin, and compromising CCT7 can directly influence an evolutionary conserved epigenetic network that supervises the appropriate cellular identities during development and homeostasis of an organism.
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Affiliation(s)
- Najma Shaheen
- Epigenetics and Gene Regulation Laboratory, Department of Biology, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan
| | - Jawad Akhtar
- Epigenetics and Gene Regulation Laboratory, Department of Biology, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan
| | - Zain Umer
- Epigenetics and Gene Regulation Laboratory, Department of Biology, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan
| | - Muhammad Haider Farooq Khan
- Epigenetics and Gene Regulation Laboratory, Department of Biology, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan
| | - Mahnoor Hussain Bakhtiari
- Epigenetics and Gene Regulation Laboratory, Department of Biology, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan
| | - Murtaza Saleem
- Department of Physics, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan
| | - Amir Faisal
- Cancer Therapeutics Laboratory, Department of Biology, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan
| | - Muhammad Tariq
- Epigenetics and Gene Regulation Laboratory, Department of Biology, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan
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van der Weijden VA, Bulut-Karslioglu A. Molecular Regulation of Paused Pluripotency in Early Mammalian Embryos and Stem Cells. Front Cell Dev Biol 2021; 9:708318. [PMID: 34386497 PMCID: PMC8353277 DOI: 10.3389/fcell.2021.708318] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/06/2021] [Indexed: 02/06/2023] Open
Abstract
The energetically costly mammalian investment in gestation and lactation requires plentiful nutritional sources and thus links the environmental conditions to reproductive success. Flexibility in adjusting developmental timing enhances chances of survival in adverse conditions. Over 130 mammalian species can reversibly pause early embryonic development by switching to a near dormant state that can be sustained for months, a phenomenon called embryonic diapause. Lineage-specific cells are retained during diapause, and they proliferate and differentiate upon activation. Studying diapause thus reveals principles of pluripotency and dormancy and is not only relevant for development, but also for regeneration and cancer. In this review, we focus on the molecular regulation of diapause in early mammalian embryos and relate it to maintenance of potency in stem cells in vitro. Diapause is established and maintained by active rewiring of the embryonic metabolome, epigenome, and gene expression in communication with maternal tissues. Herein, we particularly discuss factors required at distinct stages of diapause to induce, maintain, and terminate dormancy.
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18
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Ohhara Y, Hoshino G, Imahori K, Matsuyuki T, Yamakawa-Kobayashi K. The Nutrient-Responsive Molecular Chaperone Hsp90 Supports Growth and Development in Drosophila. Front Physiol 2021; 12:690564. [PMID: 34239451 PMCID: PMC8258382 DOI: 10.3389/fphys.2021.690564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 05/27/2021] [Indexed: 01/09/2023] Open
Abstract
Animals can sense internal nutrients, such as amino acids/proteins, and are able to modify their developmental programs in accordance with their nutrient status. In the fruit fly, Drosophila melanogaster, amino acid/protein is sensed by the fat body, an insect adipose tissue, through a nutrient sensor, target of rapamycin (TOR) complex 1 (TORC1). TORC1 promotes the secretion of various peptide hormones from the fat body in an amino acid/protein-dependent manner. Fat-body-derived peptide hormones stimulate the release of insulin-like peptides, which are essential growth-promoting anabolic hormones, from neuroendocrine cells called insulin-producing cells (IPCs). Although the importance of TORC1 and the fat body-IPC axis has been elucidated, the mechanism by which TORC1 regulates the expression of insulinotropic signal peptides remains unclear. Here, we show that an evolutionarily conserved molecular chaperone, heat shock protein 90 (Hsp90), promotes the expression of insulinotropic signal peptides. Fat-body-selective Hsp90 knockdown caused the transcriptional downregulation of insulinotropic signal peptides. IPC activity and systemic growth were also impaired in fat-body-selective Hsp90 knockdown animals. Furthermore, Hsp90 expression depended on protein/amino acid availability and TORC1 signaling. These results strongly suggest that Hsp90 serves as a nutrient-responsive gene that upregulates the fat body-IPC axis and systemic growth. We propose that Hsp90 is induced in a nutrient-dependent manner to support anabolic metabolism during the juvenile growth period.
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Affiliation(s)
- Yuya Ohhara
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba, Japan
| | - Genki Hoshino
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
| | - Kyosuke Imahori
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
| | - Tomoya Matsuyuki
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
| | - Kimiko Yamakawa-Kobayashi
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
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Lacey T, Lacey H. Linking hsp90's role as an evolutionary capacitator to the development of cancer. Cancer Treat Res Commun 2021; 28:100400. [PMID: 34023771 DOI: 10.1016/j.ctarc.2021.100400] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/22/2021] [Accepted: 05/10/2021] [Indexed: 06/12/2023]
Abstract
This paper links Heat Shock Protein Hsp90 as an evolutionary capacitator with the development of cancer. Hsp90 stabilises proteins associated with cancer in a number of ways. Canalisation allows for the accumulation of malignant mutations in the genome, and selection of beneficial phenotypes when cancer cells are stressed, allowing oncogenic development and progression. Hsp90 may allow for mutational 'big bangs' that can trigger primary malignant transformation. Hsp90 buffers catastrophic mutations in the oncogenome to prevent protein degradation and cellular apoptosis. Hsp90 was found to prevent the degradation of mutated p53, encouraging uncontrolled proliferation of cancer cells. Hsp90 buffering of mutations in response to cytotoxic therapy can lead to expression of beneficial phenotypes when Hsp90 is supressed and development of drug resistance. Trials with Hsp90 inhibitors have shown some success as an adjunctive therapy in preventing cancer progression, development of drug resistance, and even re-sensitisation to therapy after chemoresistance has developed.
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Affiliation(s)
- Thomas Lacey
- School of Life Sciences, University of Sussex, Brighton, BN1 9RQ, United Kingdom
| | - Hester Lacey
- Brighton and Sussex Medical School, Brighton and Sussex University Hospitals Trust, 1 Brookway Burgess Hill RH15 0LL, Brighton, BN2 5BE United Kingdom.
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Specchia V, Bozzetti MP. The Role of HSP90 in Preserving the Integrity of Genomes Against Transposons Is Evolutionarily Conserved. Cells 2021; 10:cells10051096. [PMID: 34064379 PMCID: PMC8147803 DOI: 10.3390/cells10051096] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/29/2021] [Accepted: 04/30/2021] [Indexed: 12/31/2022] Open
Abstract
The HSP90 protein is a molecular chaperone intensively studied for its role in numerous cellular processes both under physiological and stress conditions. This protein acts on a wide range of substrates with a well-established role in cancer and neurological disorders. In this review, we focused on the involvement of HSP90 in the silencing of transposable elements and in the genomic integrity maintenance. The common feature of transposable elements is the potential jumping in new genomic positions, causing chromosome structure rearrangements, gene mutations, and influencing gene expression levels. The role of HSP90 in the control of these elements is evolutionarily conserved and opens new perspectives in the HSP90-related mechanisms underlying human disorders. Here, we discuss the hypothesis that its role in the piRNA pathway regulating transposons may be implicated in the onset of neurological diseases.
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21
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Tabassum W, Bhattacharyya S, Varunan SM, Bhattacharyya MK. Febrile temperature causes transcriptional downregulation of Plasmodium falciparum Sirtuins through Hsp90-dependent epigenetic modification. Mol Microbiol 2021; 115:1025-1038. [PMID: 33538363 DOI: 10.1111/mmi.14692] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 01/30/2021] [Accepted: 01/30/2021] [Indexed: 11/28/2022]
Abstract
Sirtuins (PfSIR2A and PfSIR2B) are implicated to play pivotal roles in the silencing of sub-telomeric genes and the maintenance of telomere length in P. falciparum 3D7 strain. Here, we identify the key factors that regulate the cellular abundance and activity of these two histone deacetylases. Our results demonstrate that PfSIR2A and PfSIR2B are transcriptionally downregulated at the mid-ring stage in response to febrile temperature. We found that the molecular chaperone PfHsp90 acts as a repressor of PfSIR2A & B transcription. By virtue of its presence in the PfSIR2A & B promoter proximal regions PfHsp90 helps recruiting H3K9me3, conferring heterochromatic state, and thereby leading to the downregulation of PfSIR2A & B transcription. Such transcriptional downregulation can be reversed by the addition of 17-(allylamino)-17-demethoxygeldanamycin or Radicicol, two potent inhibitors of PfHsp90. The reduced occupancy of PfSir2 at sub-telomeric var promoters leads to the de-repression of var genes. Thus, here we uncover how exposure to febrile temperature, a hallmark of malaria, enables the parasites to manipulate the expression of the two prominent epigenetic modifiers PfSir2A and PfSir2B.
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Affiliation(s)
- Wahida Tabassum
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Sunanda Bhattacharyya
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Shalu M Varunan
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad, India
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22
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Mouratidis PXE, Ter Haar G. HSP90 inhibition acts synergistically with heat to induce a pro-immunogenic form of cell death in colon cancer cells. Int J Hyperthermia 2021; 38:1443-1456. [PMID: 34612127 DOI: 10.1080/02656736.2021.1983036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 09/03/2021] [Accepted: 09/14/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Sub-ablative heat induces pleiotropic biological effects in cancer cells, activating programmed cell death or survival processes. These processes decide the fate of the heated cell. This study investigates these and assesses whether heat, in combination with HSP90 inhibition, augments cell death and induces a pro-immune phenotype in these cells. METHODS HCT116 and HT29 cells were subjected to thermal doses (TID) of 60 and 120CEM43 using a PCR thermal cycler. HSP90 was inhibited with NVP-AUY922. Viability was assessed using the MTT assay. Cellular ATP and HSP70 release were assessed using ATP and Enzyme-linked Immunosorbent assays, respectively. Flow cytometry and immunoblotting were used to study the regulation of biomarkers associated with the heat shock response, the cell cycle, and immunogenic and programmed cell death. RESULTS Exposure of HCT116 and HT29 cells to TIDs of 60 and 120CEM43 decreased their viability. In addition, treatment with 120CEM43 increased intracellular HSP70 and the percentage of HCT116/HT29 cells in the G2/M cell cycle phase, ATP release and Calreticulin/HSP70/HSP90 exposure in the plasma membrane, while downregulating CD47 compared to sham-exposed cells. When combined with NVP-AUY922, treatment of HCT116/HT29 cells with 120CEM43 resulted in a synergistic decrease of cell viability associated with the induction of apoptosis. Also, the combined treatments increased Calreticulin exposure, CD47 downregulation, and HSP70 release compared to the sham-exposed cells. CONCLUSION Sub-ablative heating can act synergistically with the clinically relevant HSP90 inhibitor NVP-AUY922 to induce a pro-immunogenic form of cell death in colon cancer cells.
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Affiliation(s)
- Petros X E Mouratidis
- Joint Department of Physics, Division of Radiotherapy and Imaging, The Institute of Cancer Research: Royal Marsden Hospital, Sutton, London, UK
| | - Gail Ter Haar
- Joint Department of Physics, Division of Radiotherapy and Imaging, The Institute of Cancer Research: Royal Marsden Hospital, Sutton, London, UK
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23
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Edkins AL, Boshoff A. General Structural and Functional Features of Molecular Chaperones. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1340:11-73. [PMID: 34569020 DOI: 10.1007/978-3-030-78397-6_2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Molecular chaperones are a group of structurally diverse and highly conserved ubiquitous proteins. They play crucial roles in facilitating the correct folding of proteins in vivo by preventing protein aggregation or facilitating the appropriate folding and assembly of proteins. Heat shock proteins form the major class of molecular chaperones that are responsible for protein folding events in the cell. This is achieved by ATP-dependent (folding machines) or ATP-independent mechanisms (holders). Heat shock proteins are induced by a variety of stresses, besides heat shock. The large and varied heat shock protein class is categorised into several subfamilies based on their sizes in kDa namely, small Hsps (HSPB), J domain proteins (Hsp40/DNAJ), Hsp60 (HSPD/E; Chaperonins), Hsp70 (HSPA), Hsp90 (HSPC), and Hsp100. Heat shock proteins are localised to different compartments in the cell to carry out tasks specific to their environment. Most heat shock proteins form large oligomeric structures, and their functions are usually regulated by a variety of cochaperones and cofactors. Heat shock proteins do not function in isolation but are rather part of the chaperone network in the cell. The general structural and functional features of the major heat shock protein families are discussed, including their roles in human disease. Their function is particularly important in disease due to increased stress in the cell. Vector-borne parasites affecting human health encounter stress during transmission between invertebrate vectors and mammalian hosts. Members of the main classes of heat shock proteins are all represented in Plasmodium falciparum, the causative agent of cerebral malaria, and they play specific functions in differentiation, cytoprotection, signal transduction, and virulence.
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Affiliation(s)
- Adrienne Lesley Edkins
- Biomedical Biotechnology Research Unit (BioBRU), Department of Biochemistry and Microbiology, Rhodes University, Makhanda/Grahamstown, South Africa.
- Rhodes University, Makhanda/Grahamstown, South Africa.
| | - Aileen Boshoff
- Rhodes University, Makhanda/Grahamstown, South Africa.
- Biotechnology Innovation Centre, Rhodes University, Makhanda/Grahamstown, South Africa.
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Yin H, Shang Q, Zhang S, Shen M, Huang H, Zhao W, Xijie G, Wu P. Comprehensive analysis of lncRNA-mRNA regulatory network in BmNPV infected cells treated with Hsp90 inhibitor. Mol Immunol 2020; 127:230-237. [PMID: 33022580 DOI: 10.1016/j.molimm.2020.09.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/16/2020] [Accepted: 09/21/2020] [Indexed: 11/16/2022]
Abstract
Bombyx mori nucleopolyhedrovirus (BmNPV) is one of the main pathogens that seriously affect the sustainable development of sericulture industry. Inhibition of Hsp90 by Hsp90 inhibitor, geldanamycin (GA) significantly suppresses BmNPV proliferation in Bombyx mori, while the functional mechanism is not clear. LncRNA has been widely reported to play an important role in immune responses and host-virus interactions in mammalian. However, related research has been rarely reported on silkworm. In this study, firstly, we confirmed the decrease of BmNPV ORF75 protein in the BmNPV-infected BmN cells treated with GA. Next, by using a genome-wide transcriptome analysis, we compared the lncRNA and mRNA expression profiles in BmNPV infected BmN cells treated with or without GA and identified a total of 282 differentially expressed lncRNAs (DElncRNAs) and 523 DEmRNAs. KEGG pathway analysis revealed DEmRNA were mainly involved in ubiquitin mediated proteolysis, spliceosome, RNA transport and oxidative phosphorylation. Further, we selected 27 immune-related DEmRNAs, which displayed the similar changes of expression patterns on both protein level and transcript level to construct DElncRNA-DEmRNA network. In addition, based on the DElncRNA-bmo-miR-278-3p-BmHSC70 regulatory network, we explored the potential function of several lncRNAs as sponges to inhibit the regulatory effect of bmo-278-3p on Bombyx mori heat shock protein cognate 70 (BmHSC70). Our finding suggests that lncRNAs play a role in the regulation of BmNPV proliferation by Hsp90.
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Affiliation(s)
- Haotong Yin
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China
| | - Qi Shang
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China
| | - Shaolun Zhang
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China
| | - Manman Shen
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China
| | - Haoling Huang
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China
| | - Weiguo Zhao
- Jiangsu Key Laboratory of Sericutural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China; Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, Jiangsu 212018, China
| | - Guo Xijie
- Jiangsu Key Laboratory of Sericutural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China; Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, Jiangsu 212018, China
| | - Ping Wu
- Jiangsu Key Laboratory of Sericutural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212018, China; Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, Jiangsu 212018, China.
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25
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Antonova A, Hummel B, Khavaran A, Redhaber DM, Aprile-Garcia F, Rawat P, Gundel K, Schneck M, Hansen EC, Mitschke J, Mittler G, Miething C, Sawarkar R. Heat-Shock Protein 90 Controls the Expression of Cell-Cycle Genes by Stabilizing Metazoan-Specific Host-Cell Factor HCFC1. Cell Rep 2020; 29:1645-1659.e9. [PMID: 31693902 DOI: 10.1016/j.celrep.2019.09.084] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 08/06/2019] [Accepted: 09/27/2019] [Indexed: 12/18/2022] Open
Abstract
Molecular chaperones such as heat-shock proteins (HSPs) help in protein folding. Their function in the cytosol has been well studied. Notably, chaperones are also present in the nucleus, a compartment where proteins enter after completing de novo folding in the cytosol, and this raises an important question about chaperone function in the nucleus. We performed a systematic analysis of the nuclear pool of heat-shock protein 90. Three orthogonal and independent analyses led us to the core functional interactome of HSP90. Computational and biochemical analyses identify host cell factor C1 (HCFC1) as a transcriptional regulator that depends on HSP90 for its stability. HSP90 was required to maintain the expression of HCFC1-targeted cell-cycle genes. The regulatory nexus between HSP90 and the HCFC1 module identified in this study sheds light on the relevance of chaperones in the transcription of cell-cycle genes. Our study also suggests a therapeutic avenue of combining chaperone and transcription inhibitors for cancer treatment.
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Affiliation(s)
- Aneliya Antonova
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Barbara Hummel
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Ashkan Khavaran
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany; Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Desiree M Redhaber
- German Consortium for Translational Cancer Research (DKTK), Partner Site Freiburg and German Cancer Research Center (DKFZ), Heidelberg, Germany; Department of Hematology, Oncology and Stem Cell Transplantation, Faculty of Medicine, Medical Center - University of Freiburg, Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany
| | | | - Prashant Rawat
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Kathrin Gundel
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Megan Schneck
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Erik C Hansen
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Jan Mitschke
- Department of Hematology, Oncology and Stem Cell Transplantation, Faculty of Medicine, Medical Center - University of Freiburg, Freiburg, Germany
| | - Gerhard Mittler
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Cornelius Miething
- German Consortium for Translational Cancer Research (DKTK), Partner Site Freiburg and German Cancer Research Center (DKFZ), Heidelberg, Germany; Department of Hematology, Oncology and Stem Cell Transplantation, Faculty of Medicine, Medical Center - University of Freiburg, Freiburg, Germany; BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Ritwick Sawarkar
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany; CIBSS Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany; MRC Toxicology Unit, University of Cambridge, Cambridge, UK.
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26
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Prince TL, Lang BJ, Guerrero-Gimenez ME, Fernandez-Muñoz JM, Ackerman A, Calderwood SK. HSF1: Primary Factor in Molecular Chaperone Expression and a Major Contributor to Cancer Morbidity. Cells 2020; 9:E1046. [PMID: 32331382 PMCID: PMC7226471 DOI: 10.3390/cells9041046] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/17/2020] [Accepted: 04/19/2020] [Indexed: 02/07/2023] Open
Abstract
Heat shock factor 1 (HSF1) is the primary component for initiation of the powerful heat shock response (HSR) in eukaryotes. The HSR is an evolutionarily conserved mechanism for responding to proteotoxic stress and involves the rapid expression of heat shock protein (HSP) molecular chaperones that promote cell viability by facilitating proteostasis. HSF1 activity is amplified in many tumor contexts in a manner that resembles a chronic state of stress, characterized by high levels of HSP gene expression as well as HSF1-mediated non-HSP gene regulation. HSF1 and its gene targets are essential for tumorigenesis across several experimental tumor models, and facilitate metastatic and resistant properties within cancer cells. Recent studies have suggested the significant potential of HSF1 as a therapeutic target and have motivated research efforts to understand the mechanisms of HSF1 regulation and develop methods for pharmacological intervention. We review what is currently known regarding the contribution of HSF1 activity to cancer pathology, its regulation and expression across human cancers, and strategies to target HSF1 for cancer therapy.
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Affiliation(s)
- Thomas L. Prince
- Department of Molecular Functional Genomics, Geisinger Clinic, Danville, PA 17821, USA
| | - Benjamin J. Lang
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Martin E. Guerrero-Gimenez
- Laboratory of Oncology, Institute of Medicine and Experimental Biology of Cuyo (IMBECU), National Scientific and Technical Research Council (CONICET), Buenos Aires B1657, Argentina
| | - Juan Manuel Fernandez-Muñoz
- Laboratory of Oncology, Institute of Medicine and Experimental Biology of Cuyo (IMBECU), National Scientific and Technical Research Council (CONICET), Buenos Aires B1657, Argentina
| | - Andrew Ackerman
- Department of Molecular Functional Genomics, Geisinger Clinic, Danville, PA 17821, USA
| | - Stuart K. Calderwood
- Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
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27
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Wang A, Kolhe JA, Gioacchini N, Baade I, Brieher WM, Peterson CL, Freeman BC. Mechanism of Long-Range Chromosome Motion Triggered by Gene Activation. Dev Cell 2020; 52:309-320.e5. [PMID: 31902656 PMCID: PMC7108666 DOI: 10.1016/j.devcel.2019.12.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 11/18/2019] [Accepted: 12/12/2019] [Indexed: 12/18/2022]
Abstract
Movement of chromosome sites within interphase cells is critical for numerous pathways including RNA transcription and genome organization. Yet, a mechanism for reorganizing chromatin in response to these events had not been reported. Here, we delineate a molecular chaperone-dependent pathway for relocating activated gene loci in yeast. Our presented data support a model in which a two-authentication system mobilizes a gene promoter through a dynamic network of polymeric nuclear actin. Transcription factor-dependent nucleation of a myosin motor propels the gene locus through the actin matrix, and fidelity of the actin association was ensured by ARP-containing chromatin remodelers. Motor activity of nuclear myosin was dependent on the Hsp90 chaperone. Hsp90 further contributed by biasing the remodeler-actin interaction toward nucleosomes with the non-canonical histone H2A.Z, thereby focusing the pathway on select sites such as transcriptionally active genes. Together, the system provides a rapid and effective means to broadly yet selectively mobilize chromatin sites.
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Affiliation(s)
- Anqi Wang
- Department of Cell and Developmental Biology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
| | - Janhavi A Kolhe
- Department of Cell and Developmental Biology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
| | - Nate Gioacchini
- Program of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Imke Baade
- Department of Cell and Developmental Biology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
| | - William M Brieher
- Department of Cell and Developmental Biology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
| | - Craig L Peterson
- Program of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Brian C Freeman
- Department of Cell and Developmental Biology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA.
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28
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Gvozdenov Z, Bendix LD, Kolhe J, Freeman BC. The Hsp90 Molecular Chaperone Regulates the Transcription Factor Network Controlling Chromatin Accessibility. J Mol Biol 2019; 431:4993-5003. [PMID: 31628945 PMCID: PMC6983977 DOI: 10.1016/j.jmb.2019.09.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/29/2019] [Accepted: 09/11/2019] [Indexed: 01/02/2023]
Abstract
Genomic events including gene regulation and chromatin status are controlled by transcription factors. Here we report that the Hsp90 molecular chaperone broadly regulates the transcription factor protein family. Our studies identified a biphasic use of Hsp90 in which early inactivation (15 min) of the chaperone triggered a wide reduction of DNA binding events along the genome with concurrent changes to chromatin structure. Long-term loss (6 h) of Hsp90 resulted in a decline of a divergent yet overlaying pool of transcription factors that produced a distinct chromatin pattern. Although both phases involve protein folding, the early point correlated with Hsp90 acting in a late folding step that is critical for DNA binding function, whereas prolonged Hsp90 inactivation led to a significant decrease in the steady-state transcription factor protein levels. Intriguingly, despite the broad chaperone impact on a variety of transcription factors, the operational influence of Hsp90 was at the level of chromatin with only a mild effect on gene regulation. Thus, Hsp90 selectively governs the transcription factor process overseeing local chromatin structure.
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Affiliation(s)
- Zlata Gvozdenov
- University of Illinois, Urbana-Champaign, Department of Cell and Developmental Biology, 601 S. Goodwin Avenue, Urbana, IL 61801, USA
| | - Lindsey D Bendix
- University of Illinois, Urbana-Champaign, Department of Cell and Developmental Biology, 601 S. Goodwin Avenue, Urbana, IL 61801, USA
| | - Janhavi Kolhe
- University of Illinois, Urbana-Champaign, Department of Cell and Developmental Biology, 601 S. Goodwin Avenue, Urbana, IL 61801, USA
| | - Brian C Freeman
- University of Illinois, Urbana-Champaign, Department of Cell and Developmental Biology, 601 S. Goodwin Avenue, Urbana, IL 61801, USA.
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29
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Lackie RE, Razzaq AR, Farhan SMK, Qiu LR, Moshitzky G, Beraldo FH, Lopes MH, Maciejewski A, Gros R, Fan J, Choy WY, Greenberg DS, Martins VR, Duennwald ML, Lerch JP, Soreq H, Prado VF, Prado MAM. Modulation of hippocampal neuronal resilience during aging by the Hsp70/Hsp90 co-chaperone STI1. J Neurochem 2019; 153:727-758. [PMID: 31562773 DOI: 10.1111/jnc.14882] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 08/22/2019] [Accepted: 09/25/2019] [Indexed: 12/18/2022]
Abstract
Chaperone networks are dysregulated with aging, but whether compromised Hsp70/Hsp90 chaperone function disturbs neuronal resilience is unknown. Stress-inducible phosphoprotein 1 (STI1; STIP1; HOP) is a co-chaperone that simultaneously interacts with Hsp70 and Hsp90, but whose function in vivo remains poorly understood. We combined in-depth analysis of chaperone genes in human datasets, analysis of a neuronal cell line lacking STI1 and of a mouse line with a hypomorphic Stip1 allele to investigate the requirement for STI1 in aging. Our experiments revealed that dysfunctional STI1 activity compromised Hsp70/Hsp90 chaperone network and neuronal resilience. The levels of a set of Hsp90 co-chaperones and client proteins were selectively affected by reduced levels of STI1, suggesting that their stability depends on functional Hsp70/Hsp90 machinery. Analysis of human databases revealed a subset of co-chaperones, including STI1, whose loss of function is incompatible with life in mammals, albeit they are not essential in yeast. Importantly, mice expressing a hypomorphic STI1 allele presented spontaneous age-dependent hippocampal neurodegeneration and reduced hippocampal volume, with consequent spatial memory deficit. We suggest that impaired STI1 function compromises Hsp70/Hsp90 chaperone activity in mammals and can by itself cause age-dependent hippocampal neurodegeneration in mice. Cover Image for this issue: doi: 10.1111/jnc.14749.
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Affiliation(s)
- Rachel E Lackie
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Program in Neuroscience, University of Western Ontario, London, Ontario, Canada
| | - Abdul R Razzaq
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Program in Neuroscience, University of Western Ontario, London, Ontario, Canada
| | - Sali M K Farhan
- Analytic and Translational Genetics Unit, Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, and The Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Boston, Massachusetts, USA
| | - Lily R Qiu
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Neurosciences and Mental Health, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Gilli Moshitzky
- Department of Biological Chemistry, The Edmond and Lily Safra Center for Brain Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Flavio H Beraldo
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada
| | - Marilene H Lopes
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Laboratory of Neurobiology and Stem cells, Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Andrzej Maciejewski
- Department of Biochemistry, University of Western Ontario, London, Ontario, Canada
| | - Robert Gros
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada.,Department of Medicine, University of Western Ontario, London, Ontario, Canada
| | - Jue Fan
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada
| | - Wing-Yiu Choy
- Department of Biochemistry, University of Western Ontario, London, Ontario, Canada
| | - David S Greenberg
- Department of Biological Chemistry, The Edmond and Lily Safra Center for Brain Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Vilma R Martins
- International Research Center, A.C. Camargo Cancer Center, São Paulo, Brazil
| | - Martin L Duennwald
- Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.,Department of Pathology and Laboratory Medicine, University of Western Ontario, London, Ontario, Canada
| | - Jason P Lerch
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Neurosciences and Mental Health, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Hermona Soreq
- Department of Biological Chemistry, The Edmond and Lily Safra Center for Brain Sciences, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Vania F Prado
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Program in Neuroscience, University of Western Ontario, London, Ontario, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada.,Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Marco A M Prado
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Program in Neuroscience, University of Western Ontario, London, Ontario, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada.,Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
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30
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Gvozdenov Z, Kolhe J, Freeman BC. The Nuclear and DNA-Associated Molecular Chaperone Network. Cold Spring Harb Perspect Biol 2019; 11:cshperspect.a034009. [PMID: 30745291 PMCID: PMC6771373 DOI: 10.1101/cshperspect.a034009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Maintenance of a healthy and functional proteome in all cellular compartments is critical to cell and organismal homeostasis. Yet, our understanding of the proteostasis process within the nucleus is limited. Here, we discuss the identified roles of the major molecular chaperones Hsp90, Hsp70, and Hsp60 with client proteins working in diverse DNA-associated pathways. The unique challenges facing proteins in the nucleus are considered as well as the conserved features of the molecular chaperone system in facilitating DNA-linked processes. As nuclear protein inclusions are a common feature of protein-aggregation diseases (e.g., neurodegeneration), a better understanding of nuclear proteostasis is warranted.
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Affiliation(s)
- Zlata Gvozdenov
- Department of Cell and Developmental Biology, University of Illinois, Urbana-Champaign, Urbana, Illinois 61801.,Department Chemie, Technische Universität München, Garching 85748, Germany
| | - Janhavi Kolhe
- Department of Cell and Developmental Biology, University of Illinois, Urbana-Champaign, Urbana, Illinois 61801
| | - Brian C Freeman
- Department of Cell and Developmental Biology, University of Illinois, Urbana-Champaign, Urbana, Illinois 61801
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31
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Ray M, Singh G, Lakhotia SC. Altered levels of hsromega lncRNAs further enhance Ras signaling during ectopically activated Ras induced R7 differentiation in Drosophila. Gene Expr Patterns 2019; 33:20-36. [DOI: 10.1016/j.gep.2019.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 05/07/2019] [Indexed: 12/15/2022]
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32
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Yahara I. A role for epigenetic adaption in evolution. Genes Cells 2019; 24:524-533. [PMID: 31273901 PMCID: PMC6852114 DOI: 10.1111/gtc.12709] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/23/2019] [Accepted: 06/16/2019] [Indexed: 11/27/2022]
Abstract
The outcome of epigenetic responses to stress depends strictly on genetic background, suggesting that altered phenotypes, when induced, are created by a combination of induced epigenetic factors and pre-existing allelic ones. When individuals with altered phenotypes are selected and subjected to successive breeding, alleles that potentiate epigenetic responses could accumulate in offspring populations. It is reasonable to suppose that many, if not all, of these allelic genes could also be involved in creating new phenotypes under nonstressful conditions. In this review, I discuss the possibility that the accumulation of such alleles in selected individuals with an epigenetic phenotype could give rise to individuals that exhibit the same phenotype even in the absence of stress.
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Affiliation(s)
- Ichiro Yahara
- Tokyo Metropolitan Institute of Medical ScienceTokyoJapan
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33
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Thuringer D, Garrido C. Molecular chaperones in the brain endothelial barrier: neurotoxicity or neuroprotection? FASEB J 2019; 33:11629-11639. [PMID: 31348679 DOI: 10.1096/fj.201900895r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Brain microvascular endothelial cells (BMECs) interact with astrocytes and pericytes to form the blood-brain barrier (BBB). Their compromised function alters the BBB integrity, which is associated with early events in the pathogenesis of cancer, neurodegenerative diseases, and epilepsy. Interestingly, these conditions also induce the expression of heat shock proteins (HSPs). Here we review the contribution of major HSP families to BMEC and BBB function. Although investigators mainly report protective effects of HSPs in brain, contrasted results were obtained in BMEC, which depend both on the HSP and on its location, intra- or extracellular. The therapeutic potential of HSPs must be scrupulously analyzed before targeting them in patients to reduce the progression of brain lesions and improve neurologic outcomes in the long term.-Thuringer, D., Garrido, C. Molecular chaperones in the brain endothelial barrier: neurotoxicity or neuroprotection?
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Affiliation(s)
- Dominique Thuringer
- INSERM Unité Mixte de Recherche (UMR) 1231, Institut Fédératif de Recherche en Santé-Sciences et Techniques de l'Information et de la Communication (IFR Santé-STIC), Faculté de Médecine, Université de Bourgogne Franche-Comté, Dijon, France
| | - Carmen Garrido
- INSERM Unité Mixte de Recherche (UMR) 1231, Institut Fédératif de Recherche en Santé-Sciences et Techniques de l'Information et de la Communication (IFR Santé-STIC), Faculté de Médecine, Université de Bourgogne Franche-Comté, Dijon, France
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34
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Petkau N, Budak H, Zhou X, Oster H, Eichele G. Acetylation of BMAL1 by TIP60 controls BRD4-P-TEFb recruitment to circadian promoters. eLife 2019; 8:e43235. [PMID: 31294688 PMCID: PMC6650244 DOI: 10.7554/elife.43235] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 07/10/2019] [Indexed: 12/22/2022] Open
Abstract
Many physiological processes exhibit circadian rhythms driven by cellular clocks composed of interlinked activating and repressing elements. To investigate temporal regulation in this molecular oscillator, we combined mouse genetic approaches and analyses of interactions of key circadian proteins with each other and with clock gene promoters. We show that transcriptional activators control BRD4-PTEFb recruitment to E-box-containing circadian promoters. During the activating phase of the circadian cycle, the lysine acetyltransferase TIP60 acetylates the transcriptional activator BMAL1 leading to recruitment of BRD4 and the pause release factor P-TEFb, followed by productive elongation of circadian transcripts. We propose that the control of BRD4-P-TEFb recruitment is a novel temporal checkpoint in the circadian clock cycle.
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Affiliation(s)
- Nikolai Petkau
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Harun Budak
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Xunlei Zhou
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Henrik Oster
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
| | - Gregor Eichele
- Department of Genes and BehaviorMax Planck Institute for Biophysical ChemistryGöttingenGermany
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35
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Chong KY, Kang M, Garofalo F, Ueno D, Liang H, Cady S, Madarikan O, Pitruzzello N, Tsai CH, Hartwich TM, Shuch BM, Yang-Hartwich Y. Inhibition of Heat Shock Protein 90 suppresses TWIST1 Transcription. Mol Pharmacol 2019; 96:168-179. [DOI: 10.1124/mol.119.116137] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 06/03/2019] [Indexed: 12/13/2022] Open
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36
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Condelli V, Crispo F, Pietrafesa M, Lettini G, Matassa DS, Esposito F, Landriscina M, Maddalena F. HSP90 Molecular Chaperones, Metabolic Rewiring, and Epigenetics: Impact on Tumor Progression and Perspective for Anticancer Therapy. Cells 2019; 8:cells8060532. [PMID: 31163702 PMCID: PMC6627532 DOI: 10.3390/cells8060532] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/30/2019] [Accepted: 05/31/2019] [Indexed: 12/31/2022] Open
Abstract
Heat shock protein 90 (HSP90) molecular chaperones are a family of ubiquitous proteins participating in several cellular functions through the regulation of folding and/or assembly of large multiprotein complexes and client proteins. Thus, HSP90s chaperones are, directly or indirectly, master regulators of a variety of cellular processes, such as adaptation to stress, cell proliferation, motility, angiogenesis, and signal transduction. In recent years, it has been proposed that HSP90s play a crucial role in carcinogenesis as regulators of genotype-to-phenotype interplay. Indeed, HSP90 chaperones control metabolic rewiring, a hallmark of cancer cells, and influence the transcription of several of the key-genes responsible for tumorigenesis and cancer progression, through either direct binding to chromatin or through the quality control of transcription factors and epigenetic effectors. In this review, we will revise evidence suggesting how this interplay between epigenetics and metabolism may affect oncogenesis. We will examine the effect of metabolic rewiring on the accumulation of specific metabolites, and the changes in the availability of epigenetic co-factors and how this process can be controlled by HSP90 molecular chaperones. Understanding deeply the relationship between epigenetic and metabolism could disclose novel therapeutic scenarios that may lead to improvements in cancer treatment.
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Affiliation(s)
- Valentina Condelli
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, PZ, Italy.
| | - Fabiana Crispo
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, PZ, Italy.
| | - Michele Pietrafesa
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, PZ, Italy.
| | - Giacomo Lettini
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, PZ, Italy.
| | - Danilo Swann Matassa
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy.
| | - Franca Esposito
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy.
| | - Matteo Landriscina
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, PZ, Italy.
- Medical Oncology Unit, Department of Medical and Surgical Sciences, University of Foggia, 71100 Foggia, Italy.
| | - Francesca Maddalena
- Laboratory of Pre-Clinical and Translational Research, IRCCS, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, PZ, Italy.
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37
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Quantitative proteomics analysis provides insight into the biological role of Hsp90 in BmNPV infection in Bombyx mori. J Proteomics 2019; 203:103379. [PMID: 31102755 DOI: 10.1016/j.jprot.2019.103379] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 04/14/2019] [Accepted: 05/06/2019] [Indexed: 12/14/2022]
Abstract
Heat shock protein 90, an essential chaperone responsible for the correct maturation of key proteins, has been confirmed to facilitate Bombyx mori nucleopolyhedrovirus (BmNPV) proliferation but the mechanism is not clear. In this study, we use quantitative proteomics analysis to investigate the mechanism of Hsp90 in BmNPV replication. In total, 195 differentially expressed proteins (DEPs) were identified with 136 up-regulated proteins and 59 down-regulated proteins. The protein expression level of small heat shock proteins, immune-related proteins, cellular DNA repair-related proteins and zinc finger proteins is significantly enhanced while that of protein kinases is declined. KEGG pathway analysis reveals that DEPs are involved in longevity regulating pathway, mTOR signaling pathway, FoxO signaling pathway and Toll and Imd signaling pathway. Based on the DEPs results, we speculate that inhibition of Hsp90 suppresses the BmNPV infection may because it could not only stimulate the host innate immune, induce small heat shock proteins expression to maintain the cellular proteostasis but activate host transcription factors to bind to virus DNA or protein and subsequently hinder virus replication. The results will help understand the roles of Hsp90 in BmNPV infection and shed light on new clue to illustrate the molecular mechanism of silkworm-virus interaction. SIGNIFICANCE: This is the first report on Hsp90 roles in BmNPV infection based on proteomic analysis. Our findings may provide new clue and research orientation to illustrate the molecular mechanism of silkworm-virus interaction and a set of BmHsp90 candidate clients, which may involve in BmNPV infection in BmN cells.
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38
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Kozeko LY. The Role of HSP90 Chaperones in Stability and Plasticity of Ontogenesis of Plants under Normal and Stressful Conditions (Arabidopsis thaliana). CYTOL GENET+ 2019. [DOI: 10.3103/s0095452719020063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Over-expression of Hsp83 in grossly depleted hsrω lncRNA background causes synthetic lethality and l(2)gl phenocopy in Drosophila. J Biosci 2019. [DOI: 10.1007/s12038-019-9852-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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40
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Specchia V, Puricella A, D'Attis S, Massari S, Giangrande A, Bozzetti MP. Drosophila melanogaster as a Model to Study the Multiple Phenotypes, Related to Genome Stability of the Fragile-X Syndrome. Front Genet 2019; 10:10. [PMID: 30815010 PMCID: PMC6381874 DOI: 10.3389/fgene.2019.00010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 01/11/2019] [Indexed: 12/14/2022] Open
Abstract
Fragile-X syndrome is one of the most common forms of inherited mental retardation and autistic behaviors. The reduction/absence of the functional FMRP protein, coded by the X-linked Fmr1 gene in humans, is responsible for the syndrome. Patients exhibit a variety of symptoms predominantly linked to the function of FMRP protein in the nervous system like autistic behavior and mild-to-severe intellectual disability. Fragile-X (FraX) individuals also display cellular and morphological traits including branched dendritic spines, large ears, and macroorchidism. The dFmr1 gene is the Drosophila ortholog of the human Fmr1 gene. dFmr1 mutant flies exhibit synaptic abnormalities, behavioral defects as well as an altered germline development, resembling the phenotypes observed in FraX patients. Therefore, Drosophila melanogaster is considered a good model to study the physiopathological mechanisms underlying the Fragile-X syndrome. In this review, we explore how the multifaceted roles of the FMRP protein have been addressed in the Drosophila model and how the gained knowledge may open novel perspectives for understanding the molecular defects causing the disease and for identifying novel therapeutical targets.
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Affiliation(s)
- Valeria Specchia
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, DiSTeBA, Università del Salento, Lecce, Italy
| | - Antonietta Puricella
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, DiSTeBA, Università del Salento, Lecce, Italy
| | - Simona D'Attis
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, DiSTeBA, Università del Salento, Lecce, Italy
| | - Serafina Massari
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, DiSTeBA, Università del Salento, Lecce, Italy
| | - Angela Giangrande
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Maria Pia Bozzetti
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, DiSTeBA, Università del Salento, Lecce, Italy
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41
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Pezzulo AA, Tudas RA, Stewart CG, Buonfiglio LGV, Lindsay BD, Taft PJ, Gansemer ND, Zabner J. HSP90 inhibitor geldanamycin reverts IL-13- and IL-17-induced airway goblet cell metaplasia. J Clin Invest 2019; 129:744-758. [PMID: 30640172 PMCID: PMC6355221 DOI: 10.1172/jci123524] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 11/20/2018] [Indexed: 12/29/2022] Open
Abstract
Goblet cell metaplasia, a disabling hallmark of chronic lung disease, lacks curative treatments at present. To identify novel therapeutic targets for goblet cell metaplasia, we studied the transcriptional response profile of IL-13-exposed primary human airway epithelia in vitro and asthmatic airway epithelia in vivo. A perturbation-response profile connectivity approach identified geldanamycin, an inhibitor of heat shock protein 90 (HSP90) as a candidate therapeutic target. Our experiments confirmed that geldanamycin and other HSP90 inhibitors prevented IL-13-induced goblet cell metaplasia in vitro and in vivo. Geldanamycin also reverted established goblet cell metaplasia. Geldanamycin did not induce goblet cell death, nor did it solely block mucin synthesis or IL-13 receptor-proximal signaling. Geldanamycin affected the transcriptome of airway cells when exposed to IL-13, but not when exposed to vehicle. We hypothesized that the mechanism of action probably involves TGF-β, ERBB, or EHF, which would predict that geldanamycin would also revert IL-17-induced goblet cell metaplasia, a prediction confirmed by our experiments. Our findings suggest that persistent airway goblet cell metaplasia requires HSP90 activity and that HSP90 inhibitors will revert goblet cell metaplasia, despite active upstream inflammatory signaling. Moreover, HSP90 inhibitors may be a therapeutic option for airway diseases with goblet cell metaplasia of unknown mechanism.
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Affiliation(s)
- Alejandro A. Pezzulo
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, and
- Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | - Rosarie A. Tudas
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, and
- Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | - Carley G. Stewart
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, and
- Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | | | - Brian D. Lindsay
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, and
| | - Peter J. Taft
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, and
- Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | - Nicholas D. Gansemer
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, and
- Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
| | - Joseph Zabner
- Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, and
- Pappajohn Biomedical Institute, University of Iowa, Iowa City, Iowa, USA
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42
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Schang G, Toufaily C, Bernard DJ. HDAC inhibitors impair Fshb subunit expression in murine gonadotrope cells. J Mol Endocrinol 2019; 62:67-78. [PMID: 30481159 DOI: 10.1530/jme-18-0145] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 11/26/2018] [Indexed: 12/20/2022]
Abstract
Fertility is dependent on follicle-stimulating hormone (FSH), a product of gonadotrope cells of the anterior pituitary gland. Hypothalamic gonadotropin-releasing hormone (GnRH) and intra-pituitary activins are regarded as the primary drivers of FSH synthesis and secretion. Both stimulate expression of the FSH beta subunit gene (Fshb), although the underlying mechanisms of GnRH action are poorly described relative to those of the activins. There is currently no consensus on how GnRH regulates Fshb transcription, as results vary across species and between in vivo and in vitro approaches. One of the more fully developed models suggests that the murine Fshb promoter is tonically repressed by histone deacetylases (HDACs) and that GnRH relieves this repression, at least in immortalized murine gonadotrope-like cells (LβT2 and αT3-1). In contrast, we observed that the class I/II HDAC inhibitor trichostatin A (TSA) robustly inhibited basal, activin A-, and GnRH-induced Fshb mRNA expression in LβT2 cells and in primary murine pituitary cultures. Similar results were obtained with the class I specific HDAC inhibitor, entinostat, whereas two class II-specific inhibitors, MC1568 and TMP269, had no effects on Fshb expression. Collectively, these data suggest that class I HDACs are positive, not negative, regulators of Fshb expression in vitro and that, contrary to earlier reports, GnRH may not stimulate Fshb by inhibiting HDAC-mediated repression of the gene.
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Affiliation(s)
- Gauthier Schang
- Department of Pharmacology and Therapeutics, Centre for Research in Reproduction and Development, McGill University, Montreal, Quebec, Canada
| | - Chirine Toufaily
- Department of Pharmacology and Therapeutics, Centre for Research in Reproduction and Development, McGill University, Montreal, Quebec, Canada
| | - Daniel J Bernard
- Department of Pharmacology and Therapeutics, Centre for Research in Reproduction and Development, McGill University, Montreal, Quebec, Canada
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43
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Juarez-Carreño S, Morante J, Dominguez M. Systemic signalling and local effectors in developmental stability, body symmetry, and size. Cell Stress 2018; 2:340-361. [PMID: 31225459 PMCID: PMC6551673 DOI: 10.15698/cst2018.12.167] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Symmetric growth and the origins of fluctuating asymmetry are unresolved phenomena of biology. Small, and sometimes noticeable, deviations from perfect bilateral symmetry reflect the vulnerability of development to perturbations. The degree of asymmetry is related to the magnitude of the perturbations and the ability of an individual to cope with them. As the left and right sides of an individual were presumed to be genetically identical, deviations of symmetry were traditionally attributed to non-genetic effects such as environmental and developmental noise. In this review, we draw attention to other possible sources of variability, especially to somatic mutations and transposons. Mutations are a major source of phenotypic variability and recent genomic data have highlighted somatic mutations as ubiquitous, even in phenotypically normal individuals. We discuss the importance of factors that are responsible for buffering and stabilizing the genome and for maintaining size robustness and quality through elimination of less-fit or damaged cells. However, the important question that arises from these studies is whether this self-correcting capacity and intrinsic organ size controls are sufficient to explain how symmetric structures can reach an identical size and shape. Indeed, recent discoveries in the fruit fly have uncovered a conserved hormone of the insulin/IGF/relaxin family, Dilp8, that is responsible for stabilizing body size and symmetry in the face of growth perturbations. Dilp8 alarm signals periphery growth status to the brain, where it acts on its receptor Lgr3. Loss of Dilp8-Lgr3 signaling renders flies incapable of detecting growth perturbations and thus maintaining a stable size and symmetry. These findings help to understand how size and symmetry of somatic tissues remain undeterred in noisy environments, after injury or illnesses, and in the presence of accumulated somatic mutations.
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Affiliation(s)
- Sergio Juarez-Carreño
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas-Universidad Miguel Hernández (CSIC-UMH), Avda Santiago Ramón y Cajal s/n, Campus de Sant Joan, Alicante, Spain
| | - Javier Morante
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas-Universidad Miguel Hernández (CSIC-UMH), Avda Santiago Ramón y Cajal s/n, Campus de Sant Joan, Alicante, Spain
| | - Maria Dominguez
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas-Universidad Miguel Hernández (CSIC-UMH), Avda Santiago Ramón y Cajal s/n, Campus de Sant Joan, Alicante, Spain
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Huang J, Wang H. Hsp83/Hsp90 Physically Associates with Insulin Receptor to Promote Neural Stem Cell Reactivation. Stem Cell Reports 2018; 11:883-896. [PMID: 30245208 PMCID: PMC6178561 DOI: 10.1016/j.stemcr.2018.08.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 08/21/2018] [Accepted: 08/21/2018] [Indexed: 12/14/2022] Open
Abstract
Neural stem cells (NSCs) have the ability to exit quiescence and reactivate in response to physiological stimuli. In the Drosophila brain, insulin receptor (InR)/phosphatidylinositol 3-kinase (PI3K)/Akt pathway triggers NSC reactivation. However, intrinsic mechanisms that control the InR/PI3K/Akt pathway during reactivation remain unknown. Here, we have identified heat shock protein 83 (Hsp83/Hsp90), a molecular chaperone, as an intrinsic regulator of NSC reactivation. Hsp83 is both necessary and sufficient for NSC reactivation by promoting the activation of InR pathway in larval brains in the presence of dietary amino acids. Both Hsp83 and its co-chaperone Cdc37 physically associate with InR. Finally, reactivation defects observed in brains depleted of hsp83 were rescued by over-activation of the InR/PI3K/Akt pathway, suggesting that Hsp83 functions upstream of the InR/PI3K/Akt pathway during NSC reactivation. Given the conservation of Hsp83 and the InR pathway, our finding may provide insights into the molecular mechanisms underlying mammalian NSC reactivation. Hsp83/Hsp90 and its co-chaperone Cdc37 are required for NSC reactivation Hsp83 overexpression results in premature NSC reactivation on fed condition Hsp83 and Cdc37 physically associate with InR Hsp83 and Cdc37 are required for the activation of InR pathway in NSCs
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Affiliation(s)
- Jiawen Huang
- Neuroscience & Behavioural Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Hongyan Wang
- Neuroscience & Behavioural Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore; Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore.
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45
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Chen B, Feder ME, Kang L. Evolution of heat-shock protein expression underlying adaptive responses to environmental stress. Mol Ecol 2018; 27:3040-3054. [PMID: 29920826 DOI: 10.1111/mec.14769] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 06/03/2018] [Accepted: 06/07/2018] [Indexed: 12/27/2022]
Abstract
Heat-shock proteins (Hsps) and their cognates are primary mitigators of cell stress. With increasingly severe impacts of climate change and other human modifications of the biosphere, the ability of the heat-shock system to affect evolutionary fitness in environments outside the laboratory and to evolve in response is topic of growing importance. Since the last major reviews, several advances have occurred. First, demonstrations of the heat-shock response outside the laboratory now include many additional taxa and environments. Many of these demonstrations are only correlative, however. More importantly, technical advances in "omic" quantification of nucleic acids and proteins, genomewide association analysis, and manipulation of genes and their expression have enabled the field to move beyond correlation. Several consequent advances are already evident: The pathway from heat-shock gene expression to stress tolerance in nature can be extremely complex, mediated through multiple biological processes and systems, and even multiple species. The underlying genes are more numerous, diverse and variable than previously appreciated, especially with respect to their regulatory variation and epigenetic changes. The impacts and limitations (e.g., due to trade-offs) of natural selection on these genes have become more obvious and better established. At last, as evolutionary capacitors, Hsps may have distinctive impacts on the evolution of other genes and ecological consequences.
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Affiliation(s)
- Bing Chen
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Martin E Feder
- Department of Organismal Biology and Anatomy, The University of Chicago, Chicago, Illinois
| | - Le Kang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
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46
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Neckers L, Blagg B, Haystead T, Trepel JB, Whitesell L, Picard D. Methods to validate Hsp90 inhibitor specificity, to identify off-target effects, and to rethink approaches for further clinical development. Cell Stress Chaperones 2018; 23:467-482. [PMID: 29392504 PMCID: PMC6045531 DOI: 10.1007/s12192-018-0877-2] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/16/2018] [Accepted: 01/17/2018] [Indexed: 12/12/2022] Open
Abstract
The molecular chaperone Hsp90 is one component of a highly complex and interactive cellular proteostasis network (PN) that participates in protein folding, directs misfolded and damaged proteins for destruction, and participates in regulating cellular transcriptional responses to environmental stress, thus promoting cell and organismal survival. Over the last 20 years, it has become clear that various disease states, including cancer, neurodegeneration, metabolic disorders, and infection by diverse microbes, impact the PN. Among PN components, Hsp90 was among the first to be pharmacologically targeted with small molecules. While the number of Hsp90 inhibitors described in the literature has dramatically increased since the first such small molecule was described in 1994, it has become increasingly apparent that not all of these agents have been sufficiently validated for specificity, mechanism of action, and lack of off-target effects. Given the less than expected activity of Hsp90 inhibitors in cancer-related human clinical trials, a re-evaluation of potentially confounding off-target effects, as well as confidence in target specificity and mechanism of action, is warranted. In this commentary, we provide feasible approaches to achieve these goals and we discuss additional considerations to improve the clinical efficacy of Hsp90 inhibitors in treating cancer and other diseases.
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Affiliation(s)
- Len Neckers
- Urologic Oncology Branch, National Cancer Institute, Bethesda, MD, 20892, USA.
| | - Brian Blagg
- Warren Family Research Center for Drug Discovery and Development, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Timothy Haystead
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, 27710, USA
| | - Jane B Trepel
- Developmental Therapeutics Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Luke Whitesell
- Whitehead Institute, Cambridge, MA, 02142, USA
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5G 1M1, Canada
| | - Didier Picard
- Département de Biologie Cellulaire, Université de Genève, 1211, Geneva 4, Switzerland.
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Zhang QQ, Li Y, Fu ZY, Liu XB, Yuan K, Fang Y, Liu Y, Li G, Zhang XS, Chong K, Ge L. Intact Arabidopsis RPB1 functions in stem cell niches maintenance and cell cycling control. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 95:150-167. [PMID: 29752751 DOI: 10.1111/tpj.13939] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 02/07/2018] [Accepted: 03/27/2018] [Indexed: 05/14/2023]
Abstract
Plant meristem activity depends on accurate execution of transcriptional networks required for establishing optimum functioning of stem cell niches. An Arabidopsis mutant card1-1 (constitutive auxin response with DR5:GFP) that encodes a truncated RPB1 (RNA Polymerase II's largest subunit) with shortened C-terminal domain (CTD) was identified. Phosphorylation of the CTD repeats of RPB1 is coupled to transcription in eukaryotes. Here we uncover that the truncated CTD of RPB1 disturbed cell cycling and enlarged the size of shoot and root meristem. The defects in patterning of root stem cell niche in card1-1 indicates that intact CTD of RPB1 is necessary for fine-tuning the specific expression of genes responsible for cell-fate determination. The gene-edited plants with different CTD length of RPB1, created by CRISPR-CAS9 technology, confirmed that both the full length and the DK-rich tail of RPB1's CTD play roles in the accurate transcription of CYCB1;1 encoding a cell-cycle marker protein in root meristem and hence participate in maintaining root meristem size. Our experiment proves that the intact RPB1 CTD is necessary for stem cell niche maintenance, which is mediated by transcriptional regulation of cell cycling genes.
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Affiliation(s)
- Qian-Qian Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Ying Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Zhao-Ying Fu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Xun-Biao Liu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Kai Yuan
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Ying Fang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Yan Liu
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Gang Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Xian-Sheng Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Kang Chong
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Lei Ge
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
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48
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Zabinsky RA, Mason GA, Queitsch C, Jarosz DF. It's not magic - Hsp90 and its effects on genetic and epigenetic variation. Semin Cell Dev Biol 2018; 88:21-35. [PMID: 29807130 DOI: 10.1016/j.semcdb.2018.05.015] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 04/15/2018] [Accepted: 05/15/2018] [Indexed: 10/14/2022]
Abstract
Canalization, or phenotypic robustness in the face of environmental and genetic perturbation, is an emergent property of living systems. Although this phenomenon has long been recognized, its molecular underpinnings have remained enigmatic until recently. Here, we review the contributions of the molecular chaperone Hsp90, a protein that facilitates the folding of many key regulators of growth and development, to canalization of phenotype - and de-canalization in times of stress - drawing on studies in eukaryotes as diverse as baker's yeast, mouse ear cress, and blind Mexican cavefish. Hsp90 is a hub of hubs that interacts with many so-called 'client proteins,' which affect virtually every aspect of cell signaling and physiology. As Hsp90 facilitates client folding and stability, it can epistatically suppress or enable the expression of genetic variants in its clients and other proteins that acquire client status through mutation. Hsp90's vast interaction network explains the breadth of its phenotypic reach, including Hsp90-dependent de novo mutations and epigenetic effects on gene regulation. Intrinsic links between environmental stress and Hsp90 function thus endow living systems with phenotypic plasticity in fluctuating environments. As environmental perturbations alter Hsp90 function, they also alter Hsp90's interaction with its client proteins, thereby re-wiring networks that determine the genotype-to-phenotype map. Ensuing de-canalization of phenotype creates phenotypic diversity that is not simply stochastic, but often has an underlying genetic basis. Thus, extreme phenotypes can be selected, and assimilated so that they no longer require environmental stress to manifest. In addition to acting on standing genetic variation, Hsp90 perturbation has also been linked to increased frequency of de novo variation and several epigenetic phenomena, all with the potential to generate heritable phenotypic change. Here, we aim to clarify and discuss the multiple means by which Hsp90 can affect phenotype and possibly evolutionary change, and identify their underlying common feature: at its core, Hsp90 interacts epistatically through its chaperone function with many other genes and their gene products. Its influence on phenotypic diversification is thus not magic but rather a fundamental property of genetics.
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Affiliation(s)
- Rebecca A Zabinsky
- Department of Chemical and Systems Biology, Stanford School of Medicine, Stanford, CA, United States
| | | | - Christine Queitsch
- Department of Genome Sciences, University of Washington, Seattle, WA, United States.
| | - Daniel F Jarosz
- Department of Chemical and Systems Biology, Stanford School of Medicine, Stanford, CA, United States; Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, United States.
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49
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Li Y, Hu D, Li Y, Yang B, Yu Q, Ge L. Full-length RPB1 is required in two-step shoot regeneration. Biochem Biophys Res Commun 2018; 499:895-900. [PMID: 29625106 DOI: 10.1016/j.bbrc.2018.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 11/17/2022]
Abstract
Regeneration is a complicated progress in plants and animals. Most multicellular organisms can regenerate new tissue when wounded, and plants excel most animals in their ability to regenerate whole new growth module from adult tissues. Regeneration in Arabidopsis includes two steps. Firstly, the explants from differentiated plant tissues such as roots or hypocotyls are induced to generate callus, then the shoots regenerate upon the callus. The phytohormone auxin and cytokinin play important parts in this process. And genes related to auxin and cytokinin siganls involved in the regeneration have been studied widely. As we reported before, in Arabidopsis the full-length CTD of RNA Polymerase II's largest subunit RPB1 is necessary in keeping normal cell cycling and maintaining stem cell niches. Here, we report that the mutants of card1s have significant defects in the regeneration progress both in the induction of callus and the formation of shoot. All the results further proved the importance of intact RPB1 from a distinctive perspective.
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Affiliation(s)
- Ying Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an City, Shandong Province, PR China
| | - Die Hu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an City, Shandong Province, PR China
| | - Yi Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an City, Shandong Province, PR China
| | - Bo Yang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an City, Shandong Province, PR China
| | - Qian Yu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an City, Shandong Province, PR China
| | - Lei Ge
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an City, Shandong Province, PR China.
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50
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Posfai D, Eubanks AL, Keim AI, Lu KY, Wang GZ, Hughes PF, Kato N, Haystead TA, Derbyshire ER. Identification of Hsp90 Inhibitors with Anti-Plasmodium Activity. Antimicrob Agents Chemother 2018; 62:e01799-17. [PMID: 29339390 PMCID: PMC5913967 DOI: 10.1128/aac.01799-17] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 01/05/2018] [Indexed: 12/17/2022] Open
Abstract
Malaria remains a global health burden partly due to Plasmodium parasite resistance to first-line therapeutics. The molecular chaperone heat shock protein 90 (Hsp90) has emerged as an essential protein for blood-stage Plasmodium parasites, but details about its function during malaria's elusive liver stage are unclear. We used target-based screens to identify compounds that bind to Plasmodium falciparum and human Hsp90, which revealed insights into chemotypes with species-selective binding. Using cell-based malaria assays, we demonstrate that all identified Hsp90-binding compounds are liver- and blood-stage Plasmodium inhibitors. Additionally, the Hsp90 inhibitor SNX-0723 in combination with the phosphatidylinositol 3-kinase inhibitor PIK-75 synergistically reduces the liver-stage parasite load. Time course inhibition studies with the Hsp90 inhibitors and expression analysis support a role for Plasmodium Hsp90 in late-liver-stage parasite development. Our results suggest that Plasmodium Hsp90 is essential to liver- and blood-stage parasite infections and highlight an attractive route for development of species-selective PfHsp90 inhibitors that may act synergistically in combination therapies to prevent and treat malaria.
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Affiliation(s)
- Dora Posfai
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Amber L Eubanks
- Department of Chemistry, Duke University, Durham, North Carolina, USA
| | - Allison I Keim
- Department of Chemistry, Duke University, Durham, North Carolina, USA
| | - Kuan-Yi Lu
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Grace Z Wang
- Department of Chemistry, Duke University, Durham, North Carolina, USA
| | - Philip F Hughes
- Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, North Carolina, USA
| | | | - Timothy A Haystead
- Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, North Carolina, USA
| | - Emily R Derbyshire
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Chemistry, Duke University, Durham, North Carolina, USA
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