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Wang J, Long W, Pan J, Zhang X, Luo L, Qian M, Chen W, Luo L, Xu W, Li Y, Cai Y, Xie H. DNAL7, a new allele of NAL11, has major pleiotropic effects on rice architecture. PLANTA 2024; 259:93. [PMID: 38509429 DOI: 10.1007/s00425-024-04376-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 03/07/2024] [Indexed: 03/22/2024]
Abstract
MAIN CONCLUSION dnal7, a novel allelic variant of the OsHSP40, affects rice plant architecture and grain yield by coordinating auxins, cytokinins, and gibberellic acids. Plant height and leaf morphology are the most important traits of the ideal plant architecture (IPA), and discovering related genes is critical for breeding high-yield rice. Here, a dwarf and narrow leaf 7 (dnal7) mutant was identified from a γ-ray treated mutant population, which exhibits pleiotropic effects, including dwarfing, narrow leaves, small seeds, and low grain yield per plant compared to the wild type (WT). Histological analysis showed that the number of veins and the distance between adjacent small veins (SVs) were significantly reduced compared to the WT, indicating that DNAL7 controls leaf size by regulating the formation of veins. Map-based cloning and transgenic complementation revealed that DNAL7 is allelic to NAL11, which encodes OsHSP40, and the deletion of 2 codons in dnal7 destroyed the His-Pro-Asp (HPD) motif of OsHSP40. In addition, expression of DNAL7 in both WT and dnal7 gradually increased with the increase of temperature in the range of 27-31 °C. Heat stress significantly affected the seedling height and leaf width of the dnal7 mutant. A comparative transcriptome analysis of WT and dnal7 revealed that DNAL7 influenced multiple metabolic pathways, including plant hormone signal transduction, carbon metabolism, and biosynthesis of amino acids. Furthermore, the contents of the cytokinins in leaf blades were much higher in dnal7 than in the WT, whereas the contents of auxins were lower in dnal7. The contents of bioactive gibberellic acids (GAs) including GA1, GA3, and GA4 in shoots were decreased in dnal7. Thus, DNAL7 regulates rice plant architecture by coordinating the balance of auxins, cytokinins, and GAs. These results indicate that OsHSP40 is a pleiotropic gene, which plays an important role in improving rice yield and plant architecture.
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Affiliation(s)
- Jie Wang
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
- Applied Biotechnology Research Center, Wuhan University of Bioengineering, Wuhan, 430415, Hubei, China
| | - Weixiong Long
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Jintao Pan
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Xiaolin Zhang
- Applied Biotechnology Research Center, Wuhan University of Bioengineering, Wuhan, 430415, Hubei, China
| | - Lihua Luo
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Mingjuan Qian
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Wei Chen
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Laiyang Luo
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Weibiao Xu
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Yonghui Li
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Yaohui Cai
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China
| | - Hongwei Xie
- Jiangxi Super-Rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, National Engineering Center for Rice, Nanchang, 330200, Jiangxi, China.
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2
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Preet G, Haj Hasan A, Ramlagan P, Fawdar S, Boulle F, Jaspars M. Anti-Neurodegenerating Activity: Structure-Activity Relationship Analysis of Flavonoids. Molecules 2023; 28:7188. [PMID: 37894669 PMCID: PMC10609304 DOI: 10.3390/molecules28207188] [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: 09/29/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
An anti-neurodegeneration activity study was carried out for 80 flavonoid compounds. The structure-activity analysis of the structures was carried out by performing three different anti-neurodegeneration screening tests, showing that in these structures, the presence of a hydroxy substituent group at position C3' as well as C5' of ring B and a methoxy substituent group at the C7 position of ring A play a vital role in neuroprotective and antioxidant as well as anti-inflammatory activity. Further, we found structure (5) was the top-performing active structure out of 80 structures. Subsequently, a molecular docking study was carried out for the 3 lead flavonoid compounds (4), (5), and (23) and 21 similar hypothetical proposed structures to estimate the binding strength between the tested compounds and proteins potentially involved in disease causation. Ligand-based pharmacophores were generated to guide future drug design studies.
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Affiliation(s)
- Gagan Preet
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (G.P.); (A.H.H.)
| | - Ahlam Haj Hasan
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (G.P.); (A.H.H.)
- Department of Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid 22110, Jordan
| | | | - Shameem Fawdar
- Axonova Ltd., Grand Port 51405, Mauritius; (P.R.); (S.F.); (F.B.)
| | - Fabien Boulle
- Axonova Ltd., Grand Port 51405, Mauritius; (P.R.); (S.F.); (F.B.)
| | - Marcel Jaspars
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, UK; (G.P.); (A.H.H.)
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3
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Li D, Johmura Y, Morimoto S, Doi M, Nakanishi K, Ozawa M, Tsunekawa Y, Inoue-Yamauchi A, Naruse H, Matsukawa T, Takeshita Y, Suzuki N, Aoki M, Nishiyama A, Zeng X, Konishi C, Suzuki N, Nishiyama A, Harris AS, Morita M, Yamaguchi K, Furukawa Y, Nakai K, Tsuji S, Yamazaki S, Yamanashi Y, Shimada S, Okada T, Okano H, Toda T, Nakanishi M. LONRF2 is a protein quality control ubiquitin ligase whose deficiency causes late-onset neurological deficits. NATURE AGING 2023; 3:1001-1019. [PMID: 37474791 DOI: 10.1038/s43587-023-00464-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 06/29/2023] [Indexed: 07/22/2023]
Abstract
Protein misfolding is a major factor of neurodegenerative diseases. Post-mitotic neurons are highly susceptible to protein aggregates that are not diluted by mitosis. Therefore, post-mitotic cells may have a specific protein quality control system. Here, we show that LONRF2 is a bona fide protein quality control ubiquitin ligase induced in post-mitotic senescent cells. Under unperturbed conditions, LONRF2 is predominantly expressed in neurons. LONRF2 binds and ubiquitylates abnormally structured TDP-43 and hnRNP M1 and artificially misfolded proteins. Lonrf2-/- mice exhibit age-dependent TDP-43-mediated motor neuron (MN) degeneration and cerebellar ataxia. Mouse induced pluripotent stem cell-derived MNs lacking LONRF2 showed reduced survival, shortening of neurites and accumulation of pTDP-43 and G3BP1 after long-term culture. The shortening of neurites in MNs from patients with amyotrophic lateral sclerosis is rescued by ectopic expression of LONRF2. Our findings reveal that LONRF2 is a protein quality control ligase whose loss may contribute to MN degeneration and motor deficits.
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Affiliation(s)
- Dan Li
- Division of Cancer Cell Biology, The University of Tokyo, Tokyo, Japan
| | - Yoshikazu Johmura
- Division of Cancer Cell Biology, The University of Tokyo, Tokyo, Japan.
- Division of Cancer and Senescence Biology, Cancer Research Institute, Institute for Frontier Science Initiative, Kanazawa University, Kanazawa, Japan.
| | - Satoru Morimoto
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Miyuki Doi
- Department of Neuroscience and Cell Biology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Keiko Nakanishi
- Department of Pediatrics, Central Hospital, and Department of Disease Model, Institute for Developmental Research, Aichi Developmental Disability Center, Kasugai, Japan
| | - Manabu Ozawa
- Laboratory of Reproductive Systems Biology, The University of Tokyo, Tokyo, Japan
| | - Yuji Tsunekawa
- Division of Molecular and Medical Genetics, Center for Gene and Cell Therapy, The University of Tokyo, Tokyo, Japan
| | | | - Hiroya Naruse
- Department of Neurology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takashi Matsukawa
- Department of Neurology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yukio Takeshita
- Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Naoki Suzuki
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masashi Aoki
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ayumi Nishiyama
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Xin Zeng
- Laboratory of Functional Analysis in silico, Human Genome Center, The University of Tokyo, Tokyo, Japan
| | - Chieko Konishi
- Division of Cancer Cell Biology, The University of Tokyo, Tokyo, Japan
| | - Narumi Suzuki
- Division of Cancer Cell Biology, The University of Tokyo, Tokyo, Japan
| | - Atsuya Nishiyama
- Division of Cancer Cell Biology, The University of Tokyo, Tokyo, Japan
| | | | - Mariko Morita
- Division of Clinical Genome Research, The University of Tokyo, Tokyo, Japan
| | - Kiyoshi Yamaguchi
- Division of Clinical Genome Research, The University of Tokyo, Tokyo, Japan
| | - Yoichi Furukawa
- Division of Clinical Genome Research, The University of Tokyo, Tokyo, Japan
| | - Kenta Nakai
- Laboratory of Functional Analysis in silico, Human Genome Center, The University of Tokyo, Tokyo, Japan
| | - Shoji Tsuji
- Department of Neurology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Satoshi Yamazaki
- Division of Stem Cell Biology, Center for Stem Cell Biology and Regenerative Medicine, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Laboratory of Stem Cell Therapy, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yuji Yamanashi
- Division of Genetics, The University of Tokyo, Tokyo, Japan
| | - Shoichi Shimada
- Department of Neuroscience and Cell Biology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Takashi Okada
- Division of Molecular and Medical Genetics, Center for Gene and Cell Therapy, The University of Tokyo, Tokyo, Japan
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Tatsushi Toda
- Department of Neurology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Makoto Nakanishi
- Division of Cancer Cell Biology, The University of Tokyo, Tokyo, Japan.
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4
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Tak Y, Lal SS, Gopan S, Balakrishnan M, Satheesh G, Biswal AK, Verma AK, Cole SJ, Brown RE, Hayward RE, Hines JK, Sahi C. Identification of subfunctionalized aggregate-remodeling J-domain proteins in Arabidopsis thaliana. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:1705-1722. [PMID: 36576197 PMCID: PMC10010614 DOI: 10.1093/jxb/erac514] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
J-domain proteins (JDPs) are critical components of the cellular protein quality control machinery, playing crucial roles in preventing the formation and, solubilization of cytotoxic protein aggregates. Bacteria, yeast, and plants additionally have large, multimeric heat shock protein 100 (Hsp100)-class disaggregases that resolubilize protein aggregates. JDPs interact with aggregated proteins and specify the aggregate-remodeling activities of Hsp70s and Hsp100s. However, the aggregate-remodeling properties of plant JDPs are not well understood. Here we identify eight orthologs of Sis1 (an evolutionarily conserved Class II JDP of budding yeast) in Arabidopsis thaliana with distinct aggregate-remodeling functionalities. Six of these JDPs associate with heat-induced protein aggregates in vivo and co-localize with Hsp101 at heat-induced protein aggregate centers. Consistent with a role in solubilizing cytotoxic protein aggregates, an atDjB3 mutant had defects in both solubilizing heat-induced aggregates and acquired thermotolerance as compared with wild-type seedlings. Next, we used yeast prions as protein aggregate models to show that the six JDPs have distinct aggregate-remodeling properties. Results presented in this study, as well as findings from phylogenetic analysis, demonstrate that plants harbor multiple, evolutionarily conserved JDPs with capacity to process a variety of protein aggregate conformers induced by heat and other stressors.
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Affiliation(s)
- Yogesh Tak
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, India
| | - Silviya S Lal
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, India
| | - Shilpa Gopan
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, India
| | - Madhumitha Balakrishnan
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, India
| | - Gouri Satheesh
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, India
| | - Anup K Biswal
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, India
| | - Amit K Verma
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, India
| | - Sierra J Cole
- Department of Chemistry, Lafayette College, Easton, PA, USA
| | | | | | - Justin K Hines
- Department of Chemistry, Lafayette College, Easton, PA, USA
| | - Chandan Sahi
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, India
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5
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Gautam R, Meena RK, Rampuria S, Shukla P, Kirti PB. Ectopic expression of DnaJ type-I protein homolog of Vigna aconitifolia ( VaDJI) confers ABA insensitivity and multiple stress tolerance in transgenic tobacco plants. FRONTIERS IN PLANT SCIENCE 2023; 14:1135552. [PMID: 37152162 PMCID: PMC10154610 DOI: 10.3389/fpls.2023.1135552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 03/31/2023] [Indexed: 05/09/2023]
Abstract
Reduced crop productivity results from altered plant physiological processes caused by dysfunctional proteins due to environmental stressors. In this study, a novel DnaJ Type-I encoding gene, VaDJI having a zinc finger motif in its C-terminal domain was found to be induced early upon treatment with heat stress (within 5 min) in a heat tolerant genotype of Vigna aconitifolia RMO-40. VaDJI is induced by multiple stresses. In tobacco, ectopic expression of VaDJI reduced ABA sensitivity during seed germination and the early stages of seedling growth of transgenic tobacco plants. Concomitantly, it also improved the ability of transgenic tobacco plants to withstand drought stress by modulating the photosynthetic efficiency, with the transgenic plants having higher Fv/Fm ratios and reduced growth inhibition. Additionally, transgenic plants showed a reduced build-up of H2O2 and lower MDA levels and higher chlorophyll content during drought stress, which attenuated cell damage and reduced oxidative damage. An analysis using the qRT-PCR study demonstrated that VaDJI overexpression is associated with the expression of some ROS-detoxification-related genes and stress-marker genes that are often induced during drought stress responses. These findings suggest a hypothesis whereby VaDJI positively influences drought stress tolerance and ABA signalling in transgenic tobacco, and suggests that it is a potential gene for genetic improvement of drought and heat stress tolerance in crop plants.
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Affiliation(s)
- Ranjana Gautam
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
- Department of Life Sciences and Biotechnology, Chhatrapati Shahu Ji Maharaj University, Kanpur, Uttar Pradesh, India
- *Correspondence: Ranjana Gautam, ; P. B. Kirti,
| | - Rajesh Kumar Meena
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - Sakshi Rampuria
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - Pawan Shukla
- Seri-Biotech Research Laboratory, Central Silk Board, Bangalore, India
| | - P. B. Kirti
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
- *Correspondence: Ranjana Gautam, ; P. B. Kirti,
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6
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Siddiqui SH, Khan M, Park J, Lee J, Choe H, Shim K, Kang D. COPA3 peptide supplementation alleviates the heat stress of chicken fibroblasts. Front Vet Sci 2023; 10:985040. [PMID: 36908511 PMCID: PMC9998527 DOI: 10.3389/fvets.2023.985040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 02/07/2023] [Indexed: 03/14/2023] Open
Abstract
Heat stress inhibits cellular proliferation and differentiation through the production of reactive oxygen species. Under stress conditions, antioxidant drugs promote stable cellular function by reducing the stress level. We sought to demonstrate 9-mer disulfide dimer peptide (COPA3) supplementation stabilizes fibroblast proliferation and differentiation even under heat stress conditions. In our study, fibroblasts were assigned to two different groups based on the temperature, like 38°C group presented as Control - and 43°C group presented as Heat Stress-. Each group was subdivided into two groups depending upon COPA3 treatment, like 38°C + COPA3 group symbolized Control+ and the 43°C + COPA3 group symbolized as Heat Stress+. Heat stress was observed to decrease the fibroblast viability and function and resulted in alterations in the fibroblast shape and cytoskeleton structure. In contrast, COPA3 stabilized the fibroblast viability, shape, and function. Moreover, heat stress and COPA3 were found to have opposite actions with respect to energy production, which facilitates the stabilization of cellular functions by increasing the heat tolerance capacity. The gene expression levels of antioxidant and heat shock proteins were higher after heat stress. Additionally, heat stress promotes the mitogen-activated protein kinase/ extracellular signal-regulated kinase-nuclear factor erythroid 2-related factor 2 (MAPK/ERK-Nrf2). COPA3 maintained the MAPK/ERK-Nrf2 gene expressions that promote stable fibroblast proliferation, and differentiation as well as suppress apoptosis. These findings suggest that COPA3 supplementation increases the heat tolerance capacity, viability, and functional activity of fibroblasts.
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Affiliation(s)
- Sharif Hasan Siddiqui
- Center for Musculoskeletal Research, School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, NY, United States.,Karmanos Cancer Institute, Wayne State University, Detroit, MI, United States
| | - Mousumee Khan
- Department of Biomedical Sciences and Institute for Medical Science, Jeonbuk National University Medical School, Jeonju, Republic of Korea
| | - Jinryong Park
- Department of Animal Biotechnology, Jeonbuk National University, Jeonju, Republic of Korea.,Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul, Republic of Korea.,3D Tissue Culture Research Center, Konkuk University, Seoul, Republic of Korea
| | - Jeongeun Lee
- Department of Agricultural Convergence Technology, Jeonbuk National University, Jeonju, Republic of Korea
| | - Hosung Choe
- Department of Animal Biotechnology, Jeonbuk National University, Jeonju, Republic of Korea
| | - Kwanseob Shim
- Department of Animal Biotechnology, Jeonbuk National University, Jeonju, Republic of Korea.,Department of Agricultural Convergence Technology, Jeonbuk National University, Jeonju, Republic of Korea
| | - Darae Kang
- Department of Animal Biotechnology, Jeonbuk National University, Jeonju, Republic of Korea
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7
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Phukan UJ, Stael S, Gonçalves A, Van Breusegem F, Coll NS. Detection and Quantification of Protein Aggregates in Plants. Methods Mol Biol 2023; 2581:221-228. [PMID: 36413320 DOI: 10.1007/978-1-0716-2784-6_15] [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] [Indexed: 06/16/2023]
Abstract
Protein quality control is an important aspect of stress recovery. It maintains protein homeostasis through a machinery of regulatory proteins such as chaperones and proteases. When the system recognizes accumulation of misfolded or aggregated proteins, the cell recruits a set of regulatory proteins to initiate protein quality control. To understand the dynamics of stress-mediated aggregate protein formation and recovery in plants, robust methods aimed at detecting and measuring such protein aggregates are needed. This will help us to deepen our understanding of protein quality control mechanisms in plants.
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Affiliation(s)
- Ujjal Jyoti Phukan
- Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Barcelona, Spain
| | - Simon Stael
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB-UGent Center for Plant Systems Biology, Ghent, Belgium
| | - Amanda Gonçalves
- VIB Bioimaging Core, VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Frank Van Breusegem
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB-UGent Center for Plant Systems Biology, Ghent, Belgium
| | - Núria S Coll
- Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Barcelona, Spain.
- Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain.
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8
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Ku YS, Cheng SS, Cheung MY, Law CH, Lam HM. The Re-Localization of Proteins to or Away from Membranes as an Effective Strategy for Regulating Stress Tolerance in Plants. MEMBRANES 2022; 12:membranes12121261. [PMID: 36557168 PMCID: PMC9788111 DOI: 10.3390/membranes12121261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 06/12/2023]
Abstract
The membranes of plant cells are dynamic structures composed of phospholipids and proteins. Proteins harboring phospholipid-binding domains or lipid ligands can localize to membranes. Stress perception can alter the subcellular localization of these proteins dynamically, causing them to either associate with or detach from membranes. The mechanisms behind the re-localization involve changes in the lipidation state of the proteins and interactions with membrane-associated biomolecules. The functional significance of such re-localization includes the regulation of molecular transport, cell integrity, protein folding, signaling, and gene expression. In this review, proteins that re-localize to or away from membranes upon abiotic and biotic stresses will be discussed in terms of the mechanisms involved and the functional significance of their re-localization. Knowledge of the re-localization mechanisms will facilitate research on increasing plant stress adaptability, while the study on re-localization of proteins upon stresses will further our understanding of stress adaptation strategies in plants.
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9
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Kang Y, Lee K, Hoshikawa K, Kang M, Jang S. Molecular Bases of Heat Stress Responses in Vegetable Crops With Focusing on Heat Shock Factors and Heat Shock Proteins. FRONTIERS IN PLANT SCIENCE 2022; 13:837152. [PMID: 35481144 PMCID: PMC9036485 DOI: 10.3389/fpls.2022.837152] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/09/2022] [Indexed: 05/09/2023]
Abstract
The effects of the climate change including an increase in the average global temperatures, and abnormal weather events such as frequent and severe heatwaves are emerging as a worldwide ecological concern due to their impacts on plant vegetation and crop productivity. In this review, the molecular processes of plants in response to heat stress-from the sensing of heat stress, the subsequent molecular cascades associated with the activation of heat shock factors and their primary targets (heat shock proteins), to the cellular responses-have been summarized with an emphasis on the classification and functions of heat shock proteins. Vegetables contain many essential vitamins, minerals, antioxidants, and fibers that provide many critical health benefits to humans. The adverse effects of heat stress on vegetable growth can be alleviated by developing vegetable crops with enhanced thermotolerance with the aid of various genetic tools. To achieve this goal, a solid understanding of the molecular and/or cellular mechanisms underlying various responses of vegetables to high temperature is imperative. Therefore, efforts to identify heat stress-responsive genes including those that code for heat shock factors and heat shock proteins, their functional roles in vegetable crops, and also their application to developing vegetables tolerant to heat stress are discussed.
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Affiliation(s)
- Yeeun Kang
- World Vegetable Center Korea Office, Wanju-gun, South Korea
| | - Kwanuk Lee
- National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Wanju-gun, South Korea
| | - Ken Hoshikawa
- Biological Resources and Post-harvest Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba, Japan
| | | | - Seonghoe Jang
- World Vegetable Center Korea Office, Wanju-gun, South Korea
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10
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Tilija Pun N, Lee N, Song SH, Jeong CH. Pitavastatin Induces Cancer Cell Apoptosis by Blocking Autophagy Flux. Front Pharmacol 2022; 13:854506. [PMID: 35387352 PMCID: PMC8977529 DOI: 10.3389/fphar.2022.854506] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 02/28/2022] [Indexed: 11/25/2022] Open
Abstract
Statins, a class of lipid-lowering drugs, are used in drug repositioning for treatment of human cancer. However, the molecular mechanisms underlying statin-induced cancer cell death and autophagy are not clearly defined. In the present study, we showed that pitavastatin could increase apoptosis in a FOXO3a-dependent manner in the oral cancer cell line, SCC15, and the colon cancer cell line, SW480, along with the blockade of autophagy flux. The inhibition of autophagy by silencing the LC3B gene reduced apoptosis, while blockade of autophagy flux using its inhibitor, Bafilomycin A1, further induced apoptosis upon pitavastatin treatment, which suggested that autophagy flux blockage was the cause of apoptosis by pitavastatin. Further, the FOXO3a protein accumulated due to the blockade of autophagy flux which in turn was associated with the induction of ER stress by transcriptional upregulation of PERK-CHOP pathway, subsequently causing apoptosis due to pitavastatin treatment. Taken together, pitavastatin-mediated blockade of autophagy flux caused an accumulation of FOXO3a protein, thereby leading to the induction of PERK, ultimately causing CHOP-mediated apoptosis in cancer cells. Thus, the present study highlighted the additional molecular mechanism underlying the role of autophagy flux blockade in inducing ER stress, eventually leading to apoptosis by pitavastatin.
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Affiliation(s)
- Nirmala Tilija Pun
- College of Pharmacy, Keimyung University, Daegu, South Korea.,Boston Children's Hospital, Boston, MA, United States
| | - Naeun Lee
- College of Pharmacy, Keimyung University, Daegu, South Korea
| | - Sang-Hoon Song
- College of Pharmacy, Keimyung University, Daegu, South Korea
| | - Chul-Ho Jeong
- College of Pharmacy, Keimyung University, Daegu, South Korea
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11
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In Silico Three-Dimensional (3D) Modeling of the SecY Protein of ‘Candidatus Phytoplasma Solani’ Strains Associated with Grapevine “Bois Noir” and Its Possible Relationship with Strain Virulence. INTERNATIONAL JOURNAL OF PLANT BIOLOGY 2022. [DOI: 10.3390/ijpb13020004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Grapevine “bois noir”, related to the presence of ‘Candidatus Phytoplasma solani’ (‘Ca. P. solani’), represents a serious threat in several vine-growing areas worldwide. In surveys conducted over two years, mild and/or moderate symptoms and lower pathogen titer were mainly associated with ‘Ca. P. solani’ strains harboring a secY gene sequence variant (secY52), whereas severe symptoms and higher titer were mainly observed in grapevines infected by phytoplasma strains carrying any one of another four variants. A comparison of amino acid sequences of the protein SecY of ‘Ca. P. solani’ strains revealed the presence of conservative and semi-conservative substitutions. The deduced three-dimensional (3D) protein analysis unveiled that one semi-conservative substitution identified in the sequence variant secY52 is responsible for a structural disordered region that probably confers a flexibility for binding to distinct molecular complexes. In fact, the other analyzed variants show an organized structure and the 3D in silico prediction allowed the identification of β-sheets. Thus, differences in symptom severity and pathogen concentration observed in grapevines infected by ‘Ca. P. solani’ strains carrying distinct secY gene sequence variants suggest a possible relationship between SecY protein structure and phytoplasma strain virulence.
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Development of Plant-Based Vaccines for Prevention of Avian Influenza and Newcastle Disease in Poultry. Vaccines (Basel) 2022; 10:vaccines10030478. [PMID: 35335110 PMCID: PMC8952014 DOI: 10.3390/vaccines10030478] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/10/2022] [Accepted: 03/16/2022] [Indexed: 02/01/2023] Open
Abstract
Viral diseases, including avian influenza (AI) and Newcastle disease (ND), are an important cause of morbidity and mortality in poultry, resulting in significant economic losses. Despite the availability of commercial vaccines for the major viral diseases of poultry, these diseases continue to pose a significant risk to global food security. There are multiple factors for this: vaccine costs may be prohibitive, cold chain storage for attenuated live-virus vaccines may not be achievable, and commercial vaccines may protect poorly against local emerging strains. The development of transient gene expression systems in plants provides a versatile and robust tool to generate a high yield of recombinant proteins with superior speed while managing to achieve cost-efficient production. Plant-derived vaccines offer good stability and safety these include both subunit and virus-like particle (VLP) vaccines. VLPs offer potential benefits compared to currently available traditional vaccines, including significant reductions in virus shedding and the ability to differentiate between infected and vaccinated birds (DIVA). This review discusses the current state of plant-based vaccines for prevention of the AI and ND in poultry, challenges in their development, and potential for expanding their use in low- and middle-income countries.
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Baloji G, Jagtap S, Talakayala A, Kolli M, Lingfa L, Garladinne M, Ankanagari S. Insights from the protein sequence and structure analysis of PgHsc70 and OsHsp70 genes. Bioinformation 2022; 18:88-102. [PMID: 36420430 PMCID: PMC9649495 DOI: 10.6026/97320630018088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 01/02/2022] [Accepted: 01/02/2022] [Indexed: 09/19/2023] Open
Abstract
Heat shock proteins are induced in a wide range of abiotic and biotic stresses. They are well known for cellular chaperone activities and play an important role in protecting plants through regulation of homeostasis and survival. A comprehensive characterization and comparative analysis of the Hsp70 family members within the closely related plant species helps in better interpretation of these proteins' contribution to cell function and response to specific environmental stresses. Therefore, it is of interest to glean insights from the protein sequence analysis of PgHsc 70 and OsHsp70 genes. Thus, we document data from the sequence and structure analysis of PgHsc 70 and OsHsp 70 gene a.
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Affiliation(s)
- Gugulothu Baloji
- Department of Genetics, Osmania University, Hyderabad - 50007 (T.S) India
| | - Sandhya Jagtap
- Department of Genetics, Osmania University, Hyderabad - 50007 (T.S) India
| | - Ashwini Talakayala
- Department of Genetics, Osmania University, Hyderabad - 50007 (T.S) India
| | - Meghana Kolli
- Department of Genetics, Osmania University, Hyderabad - 50007 (T.S) India
| | - Lali Lingfa
- Department of Genetics, Osmania University, Hyderabad - 50007 (T.S) India
| | - Mallikarjuna Garladinne
- Plant Molecular Biology Laboratory, Agri Biotech Foundation, Rajendra Nagar, Hyderabad (T.S) 500 030, India
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Deshpande S, Purkar V, Mitra S. β-Cyclocitral, a Master Regulator of Multiple Stress-Responsive Genes in Solanum lycopersicum L. Plants. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10112465. [PMID: 34834828 PMCID: PMC8618229 DOI: 10.3390/plants10112465] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 06/06/2023]
Abstract
β-cyclocitral (βCC), a major apocarotenoid of β-carotene, enhances plants' defense against environmental stresses. However, the knowledge of βCC's involvement in the complex stress-signaling network is limited. Here we demonstrate how βCC reprograms the transcriptional responses that enable Solanum lycopersicum L. (tomato) plants to endure a plethora of environmental stresses. Comparative transcriptome analysis of control and βCC-treated tomato plants was done by generating RNA sequences in the BGISEQ-500 platform. The trimmed sequences were mapped on the tomato reference genome that identifies 211 protein-coding differentially expressed genes. Gene ontology and Kyoto Encyclopedia of Genes and Genomes analysis and their enrichment uncovered that only upregulated genes are attributed to the stress response. Moreover, 80% of the upregulated genes are functionally related to abiotic and biotic stresses. Co-functional analysis of stress-responsive genes revealed a network of 18 genes that code for heat shock proteins, transcription factors (TFs), and calcium-binding proteins. The upregulation of jasmonic acid (JA)-dependent TFs (MYC2, MYB44, ERFs) but not the JA biosynthetic genes is surprising. However, the upregulation of DREB3, an abscisic acid (ABA)-independent TF, validates the unaltered expression of ABA biosynthetic genes. We conclude that βCC treatment upregulates multiple stress-responsive genes without eliciting JA and ABA biosynthesis.
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Llamas E, Torres‐Montilla S, Lee HJ, Barja MV, Schlimgen E, Dunken N, Wagle P, Werr W, Zuccaro A, Rodríguez‐Concepción M, Vilchez D. The intrinsic chaperone network of Arabidopsis stem cells confers protection against proteotoxic stress. Aging Cell 2021; 20:e13446. [PMID: 34327811 PMCID: PMC8373342 DOI: 10.1111/acel.13446] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/25/2021] [Accepted: 07/08/2021] [Indexed: 01/21/2023] Open
Abstract
The biological purpose of plant stem cells is to maintain themselves while providing new pools of differentiated cells that form organs and rejuvenate or replace damaged tissues. Protein homeostasis or proteostasis is required for cell function and viability. However, the link between proteostasis and plant stem cell identity remains unknown. In contrast to their differentiated counterparts, we find that root stem cells can prevent the accumulation of aggregated proteins even under proteotoxic stress conditions such as heat stress or proteasome inhibition. Notably, root stem cells exhibit enhanced expression of distinct chaperones that maintain proteome integrity. Particularly, intrinsic high levels of the T-complex protein-1 ring complex/chaperonin containing TCP1 (TRiC/CCT) complex determine stem cell maintenance and their remarkable ability to suppress protein aggregation. Overexpression of CCT8, a key activator of TRiC/CCT assembly, is sufficient to ameliorate protein aggregation in differentiated cells and confer resistance to proteotoxic stress in plants. Taken together, our results indicate that enhanced proteostasis mechanisms in stem cells could be an important requirement for plants to persist under extreme environmental conditions and reach extreme long ages. Thus, proteostasis of stem cells can provide insights to design and breed plants tolerant to environmental challenges caused by the climate change.
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Affiliation(s)
- Ernesto Llamas
- Cologne Excellence Cluster for Cellular Stress Responses in Aging‐Associated Diseases (CECAD) University of Cologne Cologne Germany
| | - Salvador Torres‐Montilla
- Centre for Research in Agricultural Genomics (CRAG) CSIC‐IRTA‐UAB‐UBCampus UAB Bellaterra Barcelona Spain
| | - Hyun Ju Lee
- Cologne Excellence Cluster for Cellular Stress Responses in Aging‐Associated Diseases (CECAD) University of Cologne Cologne Germany
| | - María Victoria Barja
- Centre for Research in Agricultural Genomics (CRAG) CSIC‐IRTA‐UAB‐UBCampus UAB Bellaterra Barcelona Spain
| | - Elena Schlimgen
- Cologne Excellence Cluster for Cellular Stress Responses in Aging‐Associated Diseases (CECAD) University of Cologne Cologne Germany
| | - Nick Dunken
- Cluster of Excellence on Plant Sciences (CEPLAS) Institute for Plant Sciences University of Cologne Cologne Germany
| | - Prerana Wagle
- Cologne Excellence Cluster for Cellular Stress Responses in Aging‐Associated Diseases (CECAD) University of Cologne Cologne Germany
| | - Wolfgang Werr
- Developmental Biology Biocenter University of Cologne Cologne Germany
| | - Alga Zuccaro
- Cluster of Excellence on Plant Sciences (CEPLAS) Institute for Plant Sciences University of Cologne Cologne Germany
| | - Manuel Rodríguez‐Concepción
- Centre for Research in Agricultural Genomics (CRAG) CSIC‐IRTA‐UAB‐UBCampus UAB Bellaterra Barcelona Spain
- Institute for Plant Molecular and Cell Biology (IBMCP) CSIC‐UPV Valencia Spain
| | - David Vilchez
- Cologne Excellence Cluster for Cellular Stress Responses in Aging‐Associated Diseases (CECAD) University of Cologne Cologne Germany
- Center for Molecular Medicine Cologne (CMMC) University of Cologne Cologne Germany
- Faculty of Medicine University Hospital Cologne Cologne Germany
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Dong H, Li H, Xue Y, Su S, Li S, Shan X, Liu H, Jiang N, Wu X, Zhang Z, Yuan Y. E183K Mutation in Chalcone Synthase C2 Causes Protein Aggregation and Maize Colorless. FRONTIERS IN PLANT SCIENCE 2021; 12:679654. [PMID: 34249050 PMCID: PMC8261305 DOI: 10.3389/fpls.2021.679654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 05/12/2021] [Indexed: 06/13/2023]
Abstract
Flavonoids give plants their rich colors and play roles in a number of physiological processes. In this study, we identified a novel colorless maize mutant showing reduced pigmentation throughout the whole life cycle by EMS mutagenesis. E183K mutation in maize chalcone synthase C2 (ZmC2) was mapped using MutMap strategy as the causal for colorless, which was further validated by transformation in Arabidopsis. We evaluated transcriptomic and metabolic changes in maize first sheaths caused by the mutation. The downstream biosynthesis was blocked while very few genes changed their expression pattern. ZmC2-E183 site is highly conserved in chalcone synthase among Plantae kingdom and within species' different varieties. Through prokaryotic expression, transient expression in maize leaf protoplasts and stable expression in Arabidopsis, we observed that E183K and other mutations on E183 could cause almost complete protein aggregation of chalcone synthase. Our findings will benefit the characterization of flavonoid biosynthesis and contribute to the body of knowledge on protein aggregation in plants.
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Affiliation(s)
- Haixiao Dong
- College of Plant Science, Jilin University, Changchun, China
| | - He Li
- College of Plant Science, Jilin University, Changchun, China
| | - Yingjie Xue
- College of Plant Science, Jilin University, Changchun, China
| | - Shengzhong Su
- College of Plant Science, Jilin University, Changchun, China
| | - Shipeng Li
- College of Plant Science, Jilin University, Changchun, China
| | - Xiaohui Shan
- College of Plant Science, Jilin University, Changchun, China
| | - Hongkui Liu
- College of Plant Science, Jilin University, Changchun, China
| | - Nan Jiang
- College of Plant Science, Jilin University, Changchun, China
| | - Xuyang Wu
- College of Plant Science, Jilin University, Changchun, China
| | - Zhiwu Zhang
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States
| | - Yaping Yuan
- College of Plant Science, Jilin University, Changchun, China
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The E3-ligase AoUBR1 in N-end rule pathway is involved in the vegetative growth, secretome, and trap formation in Arthrobotrys oligospora. Fungal Biol 2021; 125:532-540. [PMID: 34140149 DOI: 10.1016/j.funbio.2021.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 01/27/2021] [Accepted: 02/03/2021] [Indexed: 11/20/2022]
Abstract
The N-end rule pathway is a regulated protein degradation system. Arthrobotrys oligospora, a typical nematode-trapping fungus, switches its life strategies from saprophytism to carnivorism when capturing free-living nematodes by means of adhesive networks. In this study, a putative E3-ligase AoUBR1 involved in N-end rule pathway was characterized in A. oligospora during vegetative growth and trap formation. Expression of AoUBR1 coding gene was down-regulated during trap formation. Compared with wild type, the AoUBR1 knock-out mutants decreased the vegetative growth, formed less traps, and turned to be sensitive to cold stress, while, AoUBR1 overexpression mutants lost the capacity to produce conidia and also formed less traps. A number of genes differentially expressed by knock-out and overexpression of AoUBR1, which lead to the transcriptional responses associated with plasma membrane, transportation, oxidation, and proteolysis. AoUBR1 knock-out also resulted in the down-regulation of numerous secreted proteins associated with carnivorism and nutrient utilization from nematodes. In addition, AoUBR1 homologs were conserved in nematode-trapping fungi based on the genome searching. Therefore, the results suggested AoUBR1 in A. oligospora and its homologs in other trapping fungi are involved in the lifestyle switch between saprophytism and carnivorism.
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Devi S, Kumar V, Singh SK, Dubey AK, Kim JJ. Flavonoids: Potential Candidates for the Treatment of Neurodegenerative Disorders. Biomedicines 2021; 9:biomedicines9020099. [PMID: 33498503 PMCID: PMC7909525 DOI: 10.3390/biomedicines9020099] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/13/2021] [Accepted: 01/19/2021] [Indexed: 12/13/2022] Open
Abstract
Neurodegenerative disorders, such as Parkinson's disease (PD), Alzheimer's disease (AD), Amyotrophic lateral sclerosis (ALS), and Huntington's disease (HD), are the most concerning disorders due to the lack of effective therapy and dramatic rise in affected cases. Although these disorders have diverse clinical manifestations, they all share a common cellular stress response. These cellular stress responses including neuroinflammation, oxidative stress, proteotoxicity, and endoplasmic reticulum (ER)-stress, which combats with stress conditions. Environmental stress/toxicity weakened the cellular stress response which results in cell damage. Small molecules, such as flavonoids, could reduce cellular stress and have gained much attention in recent years. Evidence has shown the potential use of flavonoids in several ways, such as antioxidants, anti-inflammatory, and anti-apoptotic, yet their mechanism is still elusive. This review provides an insight into the potential role of flavonoids against cellular stress response that prevent the pathogenesis of neurodegenerative disorders.
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Affiliation(s)
- Shweta Devi
- Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, India;
| | - Vijay Kumar
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea
- Correspondence: (V.K.); (J.-J.K.); Tel.: +82-10-9668-3464 (J.-J.K.); Fax: +82-53-801-3464 (J.-J.K.)
| | | | | | - Jong-Joo Kim
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea
- Correspondence: (V.K.); (J.-J.K.); Tel.: +82-10-9668-3464 (J.-J.K.); Fax: +82-53-801-3464 (J.-J.K.)
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19
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Cingolani M, Mummolo L, Lugli F, Zaffagnini M, Genovese D. Protein aggregation detection with fluorescent macromolecular and nanostructured probes: challenges and opportunities. NEW J CHEM 2021. [DOI: 10.1039/d1nj01606g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nanoprobes based on various nanomaterials, polymers or AIEgens are overcoming previous limitations for diagnosis and therapy of early-stage protein aggregation.
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Affiliation(s)
- Matteo Cingolani
- Dipartimento di Chimica “Giacomo Ciamician”
- Università di Bologna
- 40126 Bologna
- Italy
| | - Liviana Mummolo
- Dipartimento di Chimica “Giacomo Ciamician”
- Università di Bologna
- 40126 Bologna
- Italy
| | - Francesca Lugli
- Dipartimento di Chimica “Giacomo Ciamician”
- Università di Bologna
- 40126 Bologna
- Italy
| | - Mirko Zaffagnini
- Dipartimento di Farmacia e Biotecnologia
- Università di Bologna
- 40126 Bologna
- Italy
| | - Damiano Genovese
- Dipartimento di Chimica “Giacomo Ciamician”
- Università di Bologna
- 40126 Bologna
- Italy
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20
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Meena S, Deb S, Samtani H, Khurana P. Dissecting the Molecular Function of Triticum aestivum STI Family Members Under Heat Stress. Front Genet 2020; 11:873. [PMID: 32973870 PMCID: PMC7466592 DOI: 10.3389/fgene.2020.00873] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 07/16/2020] [Indexed: 11/15/2022] Open
Abstract
STI/HOP functions as a co-chaperone of HSP90 and HSP70 whose molecular function has largely been being restricted as an adaptor protein. However, its role in thermotolerance is not well explored. In this article, we have identified six members of the TaSTI family, which were named according to their distribution on group 2 and group 6 chromosomes. Interestingly, TaSTI-2 members were found to express higher as compared to TaSTI-6 members under heat stress conditions, with TaSTI-2A being one of the most heat-responsive member. Consistent with this, the heterologous expression of TaSTI-2A in Arabidopsis resulted in enhanced basal as well as acquired thermotolerance as revealed by the higher yield of the plants under stress conditions. Similarly in the case of rice, TaSTI-2A transgenics exhibited enhanced thermal tolerance. Moreover, we demonstrate that TaSTI-2A interacts with TaHSP90 not only in the nucleus but also in the ER and Golgi bodies, which has not been shown till now. Additionally, TaHSP70 was also found to interact with TaSTI-6D specifically in the cytosol. Thus, these data together suggested that the TaSTI family members might play different roles under heat stress conditions in order to fine-tune the heat stress response in plants.
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Affiliation(s)
- Shaloo Meena
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| | - Sohini Deb
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| | - Harsha Samtani
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| | - Paramjit Khurana
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
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21
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Aggresomal sequestration and STUB1-mediated ubiquitylation during mammalian proteaphagy of inhibited proteasomes. Proc Natl Acad Sci U S A 2020; 117:19190-19200. [PMID: 32723828 PMCID: PMC7430983 DOI: 10.1073/pnas.1920327117] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The ubiquitin–proteasome system and autophagy are two major intracellular proteolytic pathways, and both remove misfolded and proteotoxic proteins from eukaryotic cells. This study describes the detailed regulatory pathway of proteasome degradation by autophagy for its own quality control. We discovered that a portion of inhibited proteasomes is actively sequestered into the aggresome, an insoluble fraction of the mammalian cell. The aggresome functions as a triage point for proteasome recovery and autophagic degradation. This mainly distinguishes proteasome quality control in mammals from that in other organisms. STUB1/CHIP E3 Ub ligase has a critical role in targeting inhibited proteasomes into the aggresome. These results provide strong insights into protein catabolism in various pathological conditions originating from impaired proteasomes. The 26S proteasome, a self-compartmentalized protease complex, plays a crucial role in protein quality control. Multiple levels of regulatory systems modulate proteasomal activity for substrate hydrolysis. However, the destruction mechanism of mammalian proteasomes is poorly understood. We found that inhibited proteasomes are sequestered into the insoluble aggresome via HDAC6- and dynein-mediated transport. These proteasomes colocalized with the autophagic receptor SQSTM1 and cleared through selective macroautophagy, linking aggresomal segregation to autophagic degradation. This proteaphagic pathway was counterbalanced with the recovery of proteasomal activity and was critical for reducing cellular proteasomal stress. Changes in associated proteins and polyubiquitylation on inhibited 26S proteasomes participated in the targeting mechanism to the aggresome and autophagosome. The STUB1 E3 Ub ligase specifically ubiquitylated purified human proteasomes in vitro, mainly via Lys63-linked chains. Genetic and chemical inhibition of STUB1 activity significantly impaired proteasome processing and reduced resistance to proteasomal stress. These data demonstrate that aggresomal sequestration is the crucial upstream event for proteasome quality control and overall protein homeostasis in mammals.
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Kanodia P, Vijayapalani P, Srivastava R, Bi R, Liu P, Miller WA, Howell SH. Control of translation during the unfolded protein response in maize seedlings: Life without PERKs. PLANT DIRECT 2020; 4:e00241. [PMID: 32743235 PMCID: PMC7390965 DOI: 10.1002/pld3.241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/17/2020] [Indexed: 05/05/2023]
Abstract
The accumulation of misfolded proteins in the endoplasmic reticulum (ER) defines a condition called ER stress that induces the unfolded protein response (UPR). The UPR in mammalian cells attenuates protein synthesis initiation, which prevents the piling up of misfolded proteins in the ER. Mammalian cells rely on Protein Kinase RNA-Like Endoplasmic Reticulum Kinase (PERK) phosphorylation of eIF2α to arrest protein synthesis, however, plants do not have a PERK homolog, so the question is whether plants control translation in response to ER stress. We compared changes in RNA levels in the transcriptome to the RNA levels protected by ribosomes and found a decline in translation efficiency, including many UPR genes, in response to ER stress. The decline in translation efficiency is due to the fact that many mRNAs are not loaded onto polyribosomes (polysomes) in proportion to their increase in total RNA, instead some of the transcripts accumulate in stress granules (SGs). The RNAs that populate SGs are not derived from the disassembly of polysomes because protein synthesis remains steady during stress. Thus, the surge in transcription of UPR genes in response to ER stress is accompanied by the formation of SGs, and the sequestration of mRNAs in SGs may serve to temporarily relieve the translation load during ER stress.
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Affiliation(s)
- Pulkit Kanodia
- Plant Pathology and Microbiology DepartmentIowa State UniversityAmesIAUSA
- Interdepartmental Genetics and Genomics MajorIowa State UniversityAmesIAUSA
| | | | | | - Ran Bi
- Statistics DepartmentIowa State UniversityAmesIAUSA
| | - Peng Liu
- Plant Science InstituteIowa State UniversityAmesIAUSA
- Statistics DepartmentIowa State UniversityAmesIAUSA
| | - W. Allen Miller
- Plant Pathology and Microbiology DepartmentIowa State UniversityAmesIAUSA
- Interdepartmental Genetics and Genomics MajorIowa State UniversityAmesIAUSA
- Plant Science InstituteIowa State UniversityAmesIAUSA
| | - Stephen H. Howell
- Interdepartmental Genetics and Genomics MajorIowa State UniversityAmesIAUSA
- Plant Science InstituteIowa State UniversityAmesIAUSA
- Genetics, Development and Cell Biology DepartmentIowa State UniversityAmesIAUSA
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Karunadasa SS, Kurepa J, Shull TE, Smalle JA. Cytokinin-induced protein synthesis suppresses growth and osmotic stress tolerance. THE NEW PHYTOLOGIST 2020; 227:50-64. [PMID: 32129886 DOI: 10.1111/nph.16519] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 02/22/2020] [Indexed: 05/10/2023]
Abstract
Cytokinins control critical aspects of plant development and environmental responses. Perception of cytokinin ultimately leads to the activation of proteins belonging to the type-B Response Regulator family of cytokinin response activators. In Arabidopsis thaliana, ARR1 is one of the most abundantly expressed type-B Response Regulators. We investigated the link between cytokinin signaling, protein synthesis, plant growth and osmotic stress tolerance. We show that the increased cytokinin signaling in ARR1 gain-of-function transgenic lines is associated with increased rates of protein synthesis, which lead to growth inhibition and hypersensitivity to osmotic stress. Cytokinin-induced growth inhibition and osmotic stress hypersensitivity were rescued by treatments with ABA, a hormone known to inhibit protein synthesis. We also demonstrate that cytokinin-induced protein synthesis requires isoforms of the ribosomal protein L4 encoded by the cytokinin-inducible genes RPL4A and RPL4D, and that RPL4 loss-of-function increases osmotic stress tolerance and decreases sensitivity to cytokinin-induced growth inhibition. These findings reveal that an increase in protein synthesis negatively impacts growth and osmotic stress tolerance and explain some of the adverse effects of elevated cytokinin action on plant development and stress physiology.
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Affiliation(s)
- Sumudu S Karunadasa
- Department of Plant and Soil Sciences, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA
| | - Jasmina Kurepa
- Department of Plant and Soil Sciences, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA
| | - Timothy E Shull
- Department of Plant and Soil Sciences, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA
| | - Jan A Smalle
- Department of Plant and Soil Sciences, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA
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Kim SJ, Jegal KH, Im JH, Park G, Kim S, Jeong HG, Cho IJ, Kang KW. Involvement of ER stress and reactive oxygen species generation in anti-cancer effect of CKD-516 for lung cancer. Cancer Chemother Pharmacol 2020; 85:685-697. [PMID: 32157413 DOI: 10.1007/s00280-020-04043-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 02/17/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE CKD-516 (Valecobulin), a vascular-disrupting agent, inhibits microtubule elongation. We evaluated the effect of CKD-516 on lung cancer cells and the underlying molecular mechanisms. METHODS The effects of S516, an active metabolite of CKD-516, were evaluated in HUVECs and three lung cancer cell lines and by a microtubule polymerization assay. Tubulin cross-linking was used to identify the binding site of S516 on tubulin, and Western blotting was performed to identify the intracellular pathways leading to cell death. Subcutaneous lung cancer xenograft models were used to assess the in vivo effect of CKD-516 on tumor growth. RESULTS S516 targeted the colchicine binding site on β-tubulin. In lung cancer cells, S516 increased endoplasmic reticulum (ER) stress and induced reactive oxygen species (ROS) generation by mitochondria and the ER. In addition, CKD-516 monotherapy strongly inhibited the growth of lung cancer xenograft tumors and exerted a synergistic effect with carboplatin. CONCLUSION The findings suggest that CKD-516 exerts an anticancer effect in company with inducing ER stress and ROS production via microtubule disruption in lung cancer cells. CKD-516 may thus have therapeutic potential for lung cancer.
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Affiliation(s)
- Soo Jin Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Republic of Korea
- CKD Research Institution, Chong Kun Dang Pharmaceutical Corporation, Yongin-si, Gyeonggi-do, 16995, Republic of Korea
| | - Kyung Hwan Jegal
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ji-Hye Im
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Gyutae Park
- CKD Research Institution, Chong Kun Dang Pharmaceutical Corporation, Yongin-si, Gyeonggi-do, 16995, Republic of Korea
| | - Suntae Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hye Gwang Jeong
- College of Pharmacy, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Il Je Cho
- Department of Herbal Formulation, MRC-GHF, College of Korean Medicine, Daegu Haany University, Gyeongsan, Gyeongsangbuk-do, 38610, Republic of Korea
| | - Keon Wook Kang
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
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25
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Sun FY, Liu L, Yu Y, Ruan XM, Wang CY, Hu QW, Wu DX, Sun G. MicroRNA-mediated responses to colchicine treatment in barley. PLANTA 2020; 251:44. [PMID: 31907626 DOI: 10.1007/s00425-019-03326-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
In Hordeum vulgare, nine differentially expressed novel miRNAs were induced by colchicine. Five novel miRNA in colchicine solution showed the opposite expression patterns as those in water. Colchicine is a commonly used agent for plant chromosome set doubling. MicroRNA-mediated responses to colchicine treatment in plants have not been characterized. Here, we characterized new microRNAs induced by colchicine treatment in Hordeum vulgare using high-throughput sequencing. Our results showed that 39 differentially expressed miRNAs were affected by water treatment, including 34 novel miRNAs and 5 known miRNAs; 42 miRNAs, including 37 novel miRNAs and 5 known miRNAs, were synergistically affected by colchicine and water, and 9 differentially expressed novel miRNAs were induced by colchicine. The novel_mir69, novel_mir57, novel_mir75, novel_mir38, and novel_mir56 in colchicine treatment showed the opposite expression patterns as those in water. By analyzing these 9 differentially expressed novel miRNAs and their targets, we found that novel_mir69, novel_mir56 and novel_mir25 co-target the genes involving the DNA repair pathway. Based on our results, microRNA-target regulation network under colchicine treatment was proposed, which involves actin, cell cycle regulation, cell wall synthesis, and the regulation of oxidative stress. Overall, the results demonstrated the critical role of microRNAs mediated responses to colchicine treatment in plants.
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Affiliation(s)
- Fang-Yao Sun
- College of Agronomy, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Lin Liu
- College of Agronomy, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Yi Yu
- College of Agronomy, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Xin-Ming Ruan
- College of Agronomy, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - Cheng-Yu Wang
- College of Agronomy, Anhui Agricultural University, Hefei, 230036, Anhui, China.
| | - Qun-Wen Hu
- College of Agronomy, Anhui Agricultural University, Hefei, 230036, Anhui, China
| | - De-Xiang Wu
- College of Agronomy, Anhui Agricultural University, Hefei, 230036, Anhui, China.
| | - Genlou Sun
- Biology Department, Saint Mary's University, Halifax, NS, B3H 3C3, Canada.
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26
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Glutathionylation primes soluble glyceraldehyde-3-phosphate dehydrogenase for late collapse into insoluble aggregates. Proc Natl Acad Sci U S A 2019; 116:26057-26065. [PMID: 31772010 DOI: 10.1073/pnas.1914484116] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Protein aggregation is a complex physiological process, primarily determined by stress-related factors revealing the hidden aggregation propensity of proteins that otherwise are fully soluble. Here we report a mechanism by which glycolytic glyceraldehyde-3-phosphate dehydrogenase of Arabidopsis thaliana (AtGAPC1) is primed to form insoluble aggregates by the glutathionylation of its catalytic cysteine (Cys149). Following a lag phase, glutathionylated AtGAPC1 initiates a self-aggregation process resulting in the formation of branched chains of globular particles made of partially misfolded and totally inactive proteins. GSH molecules within AtGAPC1 active sites are suggested to provide the initial destabilizing signal. The following removal of glutathione by the formation of an intramolecular disulfide bond between Cys149 and Cys153 reinforces the aggregation process. Physiological reductases, thioredoxins and glutaredoxins, could not dissolve AtGAPC1 aggregates but could efficiently contrast their growth. Besides acting as a protective mechanism against overoxidation, S-glutathionylation of AtGAPC1 triggers an unexpected aggregation pathway with completely different and still unexplored physiological implications.
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27
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Chiu HW, Yeh YL, Ho SY, Wu YH, Wang BJ, Huang WJ, Ho YS, Wang YJ, Chen LC, Tu SH. A New Histone Deacetylase Inhibitor Enhances Radiation Sensitivity through the Induction of Misfolded Protein Aggregation and Autophagy in Triple-Negative Breast Cancer. Cancers (Basel) 2019; 11:cancers11111703. [PMID: 31683883 PMCID: PMC6896096 DOI: 10.3390/cancers11111703] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/27/2019] [Accepted: 10/29/2019] [Indexed: 12/22/2022] Open
Abstract
Radiation therapy (RT) is one of the main treatments for triple-negative breast cancer (TNBC). However, many patients experience RT failure due to the metastatic potential of RT and the radiation resistance of several cancers. Histone deacetylase inhibitors (HDACis) can serve as radiosensitizers. In this study, we investigated whether a novel HDACi, TMU-35435, could reinforce radiosensitivity through the induction of misfolded protein aggregation and autophagy in TNBC. Significantly enhanced toxicity was found for the combination treatment compared with TMU-35435 or irradiation (IR) treatment alone in TNBC cells. The combination treatment induced misfolded protein aggregation and TMU-35435 inhibited the interaction of HDAC6 with dynein. Furthermore, the combined treatment induced endoplasmic reticulum (ER) stress but did not trigger apoptosis. In addition, the combination treatment caused autophagic cell death. Tumor growth in the mouse of model orthotopic breast cancer was suppressed by the combination treatment through the induction of ER stress and autophagy. These findings support the future evaluation of the novel HDACi TMU-35435, as a potent radiosensitizer in TNBC.
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Affiliation(s)
- Hui-Wen Chiu
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan.
- Division of Nephrology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, Taipei 11031, Taiwan.
| | - Ya-Ling Yeh
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Sheng-Yow Ho
- Department of Radiation Oncology, Chi Mei Medical Center, Tainan 71004, Taiwan.
- Graduate Institute of Medical Sciences, Chang Jung Christian University, Tainan 71101, Taiwan.
| | - Yuan-Hua Wu
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
- Department of Radiation Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Bour-Jr Wang
- Department of Occupational and Environmental Medicine, National Cheng Kung University Hospital, Tainan 70101, Taiwan.
- Department of Cosmetic Science and Institute of Cosmetic Science, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan.
| | - Wei-Jan Huang
- Graduate Institute of Pharmacognosy, Taipei Medical University, Taipei 11031, Taiwan.
| | - Yuan-Soon Ho
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, Taipei 11031, Taiwan.
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan.
- Department of Laboratory Medicine, Taipei Medical University Hospital, Taipei 11031, Taiwan.
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan.
| | - Ying-Jan Wang
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Li-Ching Chen
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, Taipei 11031, Taiwan.
- Division of Breast Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei 11031, Taiwan.
- Taipei Cancer Center, Taipei Medical University, Taipei 11031, Taiwan.
| | - Shih-Hsin Tu
- Division of Breast Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei 11031, Taiwan.
- Taipei Cancer Center, Taipei Medical University, Taipei 11031, Taiwan.
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan.
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28
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Barker HL, Riehl JF, Bernhardsson C, Rubert-Nason KF, Holeski LM, Ingvarsson PK, Lindroth RL. Linking plant genes to insect communities: Identifying the genetic bases of plant traits and community composition. Mol Ecol 2019; 28:4404-4421. [PMID: 31233634 DOI: 10.1111/mec.15158] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/31/2019] [Accepted: 06/03/2019] [Indexed: 12/30/2022]
Abstract
Community genetics aims to understand the effects of intraspecific genetic variation on community composition and diversity, thereby connecting community ecology with evolutionary biology. Thus far, research has shown that plant genetics can underlie variation in the composition of associated communities (e.g., insects, lichen and endophytes), and those communities can therefore be considered as extended phenotypes. This work, however, has been conducted primarily at the plant genotype level and has not identified the key underlying genes. To address this gap, we used genome-wide association mapping with a population of 445 aspen (Populus tremuloides) genets to identify the genes governing variation in plant traits (defence chemistry, bud phenology, leaf morphology, growth) and insect community composition. We found 49 significant SNP associations in 13 Populus genes that are correlated with chemical defence compounds and insect community traits. Most notably, we identified an early nodulin-like protein that was associated with insect community diversity and the abundance of interacting foundation species (ants and aphids). These findings support the concept that particular plant traits are the mechanistic link between plant genes and the composition of associated insect communities. In putting the "genes" into "genes to ecosystems ecology", this work enhances understanding of the molecular genetic mechanisms that underlie plant-insect associations and the consequences thereof for the structure of ecological communities.
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Affiliation(s)
- Hilary L Barker
- Department of Integrative Biology, University of Wisconsin-Madison, Madison, WI, USA
| | - Jennifer F Riehl
- Department of Entomology, University of Wisconsin-Madison, Madison, WI, USA
| | | | | | - Liza M Holeski
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, USA
| | - Pär K Ingvarsson
- Department of Plant Biology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Richard L Lindroth
- Department of Integrative Biology, University of Wisconsin-Madison, Madison, WI, USA.,Department of Entomology, University of Wisconsin-Madison, Madison, WI, USA
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29
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Li J, Liu X. Genome-wide identification and expression profile analysis of the Hsp20 gene family in Barley ( Hordeum vulgare L.). PeerJ 2019; 7:e6832. [PMID: 31110921 PMCID: PMC6501772 DOI: 10.7717/peerj.6832] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 03/22/2019] [Indexed: 11/29/2022] Open
Abstract
In plants, heat shock proteins (Hsps) play important roles in response to diverse stresses. Hsp20 is the major family of Hsps, but their role remains poorly understood in barley (Hordeum vulgare L.). To reveal the mechanisms of barley Hsp20s (HvHsp20s) response to stress conditions, we performed a comprehensive genome-wide analysis of the HvHsp20 gene family using bioinformatics-based methods. In total, 38 putative HvHsp20s were identified in barley and grouped into four subfamilies (C, CP, PX, and MT) based on predicted subcellular localization and their phylogenetic relationships. A sequence analysis indicated that most HvHsp20 genes have no intron or one with a relatively short length. In addition, the same group of HvHsp20 proteins in the phylogenetic tree shared similar gene structure and motifs, indicating that they were highly conserved and might have similar function. Based on RNA-seq data analysis, we showed that the transcript levels of HvHsp20 genes could be induced largely by abiotic and biotic stresses such as heat, salt, and powdery mildew. Three HvHsp20 genes, HORVU7Hr1G036540, HORVU7Hr1G036470, and HORVU3Hr1G007500, were up-regulated under biotic and abiotic stresses, suggesting their potential roles in mediating the response of barley plants to environment stresses. These results provide valuable information for further understanding the complex mechanisms of HvHsp20 gene family in barley.
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Affiliation(s)
- Jie Li
- College of Agronomy, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, China
| | - Xinhao Liu
- Kaifeng Agriculture and Forestry Science Institute, Kaifeng, Henan Province, China
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30
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Siddiqui MF, Bano B. A biophysical insight into the formation of aggregates upon trifluoroethanol induced structural and conformational changes in garlic cystatin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:7-17. [PMID: 29902773 DOI: 10.1016/j.saa.2018.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/26/2018] [Accepted: 06/02/2018] [Indexed: 06/08/2023]
Abstract
Intrinsic and extrinsic factors are responsible for the transition of soluble proteins into aggregated form. Trifluoroethanol is among such potent extrinsic factor which facilitates the formation of aggregated structure. It disrupts the interactive forces and destabilizes the native structure of the protein. The present study investigates the effect of trifluoroethanol (TFE) on garlic cystatin. Garlic cystatin was incubated with increasing concentration of TFE (0-90% v/v) for 4 h. Incubation of GPC with TFE induces structural changes thereby resulting in the formation of aggregates. Inactivation of garlic phytocystatin was confirmed by cysteine proteinase inhibitory activity. Garlic cystatin at 30% TFE exhibits native-like secondary structure and high ANS fluorescence, thus suggesting the presence of molten globule state. Circular dichroism and FTIR confirmed the transition of the native alpha-helical structure of garlic cystatin to the beta-sheet structure at 60% TFE. Furthermore, increased ThT fluorescence and redshift in Congo red absorbance assay confirmed the presence of aggregates. Rayleigh and turbidity assay was also performed to validate the aggregation results. Scanning electron microscopy was followed to analyze the morphological changes which confirm the presence of sheath-like structure at 60% TFE. The study sheds light on the conformational behavior of a plant protein when kept under stress condition induced by an extrinsic factor.
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Affiliation(s)
| | - Bilqees Bano
- Department of Biochemistry, Aligarh Muslim University, Uttar Pradesh, India.
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31
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Park JH, Kang CH, Nawkar GM, Lee ES, Paeng SK, Chae HB, Chi YH, Kim WY, Yun DJ, Lee SY. EMR, a cytosolic-abundant ring finger E3 ligase, mediates ER-associated protein degradation in Arabidopsis. THE NEW PHYTOLOGIST 2018; 220:163-177. [PMID: 29932218 DOI: 10.1111/nph.15279] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 05/18/2018] [Indexed: 05/16/2023]
Abstract
Investigation of the endoplasmic reticulum-associated degradation (ERAD) system in plants led to the identification of ERAD-mediating RING finger protein (EMR) as a plant-specific ERAD E3 ligase from Arabidopsis. EMR was significantly up-regulated under endoplasmic reticulum (ER) stress conditions. The EMR protein purified from bacteria displayed high E3 ligase activity, and tobacco leaf-produced EMR mediated mildew resistance locus O-12 (MLO12) degradation in a proteasome-dependent manner. Subcellular localization and coimmunoprecipitation analyses showed that EMR forms a complex with ubiquitin-conjugating enzyme 32 (UBC32) as a cytosolic interaction partner. Mutation of EMR and RNA interference (RNAi) increased the tolerance of plants to ER stress. EMR RNAi in the bri1-5 background led to partial recovery of the brassinosteroid (BR)-insensitive phenotypes as compared with the original mutant plants and increased ER stress tolerance. The presented results suggest that EMR is involved in the plant ERAD system that affects BR signaling under ER stress conditions as a novel Arabidopsis ring finger E3 ligase mainly present in cytosol while the previously identified ERAD E3 components are typically membrane-bound proteins.
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Affiliation(s)
- Joung Hun Park
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Chang Ho Kang
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Ganesh M Nawkar
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Eun Seon Lee
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Seol Ki Paeng
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Ho Byoung Chae
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Yong Hun Chi
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Woe Yeon Kim
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Dae-Jin Yun
- Department of Biomedical Science and Engineering, Konkuk University, Seoul, 05029, Korea
| | - Sang Yeol Lee
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
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32
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Cho Y, Kanehara K. Endoplasmic Reticulum Stress Response in Arabidopsis Roots. FRONTIERS IN PLANT SCIENCE 2017; 8:144. [PMID: 28298914 PMCID: PMC5331042 DOI: 10.3389/fpls.2017.00144] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 01/24/2017] [Indexed: 05/20/2023]
Abstract
Roots are the frontier of plant body to perceive underground environmental change. Endoplasmic reticulum (ER) stress response represents circumvention of cellular stress caused by various environmental changes; however, a limited number of studies are available on the ER stress responses in roots. Here, we report the tunicamycin (TM) -induced ER stress response in Arabidopsis roots by monitoring expression patterns of immunoglobulin-binding protein 3 (BiP3), a representative marker for the response. Roots promptly responded to the TM-induced ER stress through the induction of similar sets of ER stress-responsive genes. However, not all cells responded uniformly to the TM-induced ER stress in roots, as BiP3 was highly expressed in root tips, an outer layer in elongation zone, and an inner layer in mature zone of roots. We suggest that ER stress response in roots has tissue specificity.
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Affiliation(s)
- Yueh Cho
- Institute of Plant and Microbial Biology, Academia SinicaTaipei, Taiwan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica and National Chung-Hsing UniversityTaipei, Taiwan
- Graduate Institute of Biotechnology, National Chung-Hsing UniversityTaichung, Taiwan
| | - Kazue Kanehara
- Institute of Plant and Microbial Biology, Academia SinicaTaipei, Taiwan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica and National Chung-Hsing UniversityTaipei, Taiwan
- Biotechnology Center, National Chung-Hsing UniversityTaichung, Taiwan
- Muroran Institute of TechnologyMuroran, Japan
- *Correspondence: Kazue Kanehara,
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33
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Heikkila JJ. The expression and function of hsp30-like small heat shock protein genes in amphibians, birds, fish, and reptiles. Comp Biochem Physiol A Mol Integr Physiol 2016; 203:179-192. [PMID: 27649598 DOI: 10.1016/j.cbpa.2016.09.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/15/2016] [Accepted: 09/15/2016] [Indexed: 01/31/2023]
Abstract
Small heat shock proteins (sHSPs) are a superfamily of molecular chaperones with important roles in protein homeostasis and other cellular functions. Amphibians, reptiles, fish and birds have a shsp gene called hsp30, which was also referred to as hspb11 or hsp25 in some fish and bird species. Hsp30 genes, which are not found in mammals, are transcribed in response to heat shock or other stresses by means of the heat shock factor that is activated in response to an accumulation of unfolded protein. Amino acid sequence analysis revealed that representative HSP30s from different classes of non-mammalian vertebrates were distinct from other sHSPs including HSPB1/HSP27. Studies with amphibian and fish recombinant HSP30 determined that they were molecular chaperones since they inhibited heat- or chemically-induced aggregation of unfolded protein. During non-mammalian vertebrate development, hsp30 genes were differentially expressed in selected tissues. Also, heat shock-induced stage-specific expression of hsp30 genes in frog embryos was regulated at the level of chromatin structure. In adults and/or tissue culture cells, hsp30 gene expression was induced by heat shock, arsenite, cadmium or proteasomal inhibitors, all of which enhanced the production of unfolded/damaged protein. Finally, immunocytochemical analysis of frog and chicken tissue culture cells revealed that proteotoxic stress-induced HSP30 accumulation co-localized with aggresome-like inclusion bodies. The congregation of damaged protein in aggresomes minimizes the toxic effect of aggregated protein dispersed throughout the cell. The current availability of probes to detect the presence of hsp30 mRNA or encoded protein has resulted in the increased use of hsp30 gene expression as a marker of proteotoxic stress in non-mammalian vertebrates.
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Affiliation(s)
- John J Heikkila
- Department of Biology, University of Waterloo, Waterloo, N2L 3G1, ON, Canada.
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34
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The small heat shock protein, HSP30, is associated with aggresome-like inclusion bodies in proteasomal inhibitor-, arsenite-, and cadmium-treated Xenopus kidney cells. Comp Biochem Physiol A Mol Integr Physiol 2015; 189:130-40. [DOI: 10.1016/j.cbpa.2015.07.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 07/28/2015] [Accepted: 07/31/2015] [Indexed: 01/20/2023]
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35
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Abeynayake SW, Byrne S, Nagy I, Jonavičienė K, Etzerodt TP, Boelt B, Asp T. Changes in Lolium perenne transcriptome during cold acclimation in two genotypes adapted to different climatic conditions. BMC PLANT BIOLOGY 2015; 15:250. [PMID: 26474965 PMCID: PMC4609083 DOI: 10.1186/s12870-015-0643-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 10/12/2015] [Indexed: 05/20/2023]
Abstract
BACKGROUND Activation of numerous protective mechanisms during cold acclimation is important for the acquisition of freezing tolerance in perennial ryegrass (Lolium perenne L.). To elucidate the molecular mechanisms of cold acclimation in two genotypes ('Veyo' and 'Falster') of perennial ryegrass from distinct geographical origins, we performed transcriptome profiling during cold acclimation using RNA-Seq. METHODS We cold-acclimated plants from both genotypes in controlled conditions for a period of 17 days and isolated Total RNA at various time points for high throughput sequencing using Illumina technology. RNA-seq reads were aligned to genotype specific references to identify transcripts with significant changes in expression during cold acclimation. RESULTS The genes induced were involved in protective mechanisms such as cell response to abiotic stimulus, signal transduction, redox homeostasis, plasma membrane and cell wall modifications, and carbohydrate metabolism in both genotypes. 'Falster' genotype, adapted to cold climates, showed a stronger transcriptional differentiation during cold acclimation, and more differentially expressed transcripts related to stress, signal transduction, response to abiotic stimulus, and metabolic processes compared to 'Veyo'. 'Falster' genotype also showed an induction of more transcripts with sequence homology to fructosyltransferase genes (FTs) and a higher fold induction of fructan in response to low-temperature stress. The circadian rhythm network was perturbed in the 'Veyo' genotype adapted to warmer climates. CONCLUSION In this study, the differentially expressed genes during cold acclimation, potentially involved in numerous protective mechanisms, were identified in two genotypes of perennial ryegrass from distinct geographical origins. The observation that the circadian rhythm network was perturbed in 'Veyo' during cold acclimation may point to a low adaptability of 'Veyo' to low temperature stresses. This study also revealed the transcriptional mechanisms underlying carbon allocation towards fructan biosynthesis in perennial ryegrass.
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Affiliation(s)
- Shamila Weerakoon Abeynayake
- Department of Agroecology - Crop Health, Aarhus University, Slagelse, Denmark.
- Department of Molecular Biology and Genetics, Science and Technology, Aarhus University, Slagelse, Denmark.
| | - Stephen Byrne
- Department of Molecular Biology and Genetics, Science and Technology, Aarhus University, Slagelse, Denmark.
| | - Istvan Nagy
- Department of Molecular Biology and Genetics, Science and Technology, Aarhus University, Slagelse, Denmark.
| | - Kristina Jonavičienė
- Laboratory of Genetics and Physiology, Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Kėdainiai distr, Lithuania.
| | | | - Birte Boelt
- Department of Agroecology - Crop Health, Aarhus University, Slagelse, Denmark.
| | - Torben Asp
- Department of Molecular Biology and Genetics, Science and Technology, Aarhus University, Slagelse, Denmark.
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36
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Characterization of aggregate/aggresome structures formed by polyhedrin of Bombyx mori nucleopolyhedrovirus. Sci Rep 2015; 5:14601. [PMID: 26440217 PMCID: PMC4594129 DOI: 10.1038/srep14601] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 08/24/2015] [Indexed: 12/20/2022] Open
Abstract
Virus infections often lead to formation of aggregates and aggresomes in host cells. In this study, production of aggregates and aggresomes by the highly expressed protein polyhedrin of Bombyx mori nucleopolyhedrovirus (BmNPV) at 24 h postinfection (p.i.) was detected with a fluorescent molecular dye, and verified by colocalization of polyhedrin with aggresomal markers, GFP-250 and γ-tubulin. Polyhedrin aggregates showed hallmark characteristics of aggresomes: formation was microtubule-dependent; they colocalized with heat shock cognates/proteins of the 70-kDa family (HSC/HSP70s), ubiquitinated proteins and recruited the mitochondria. Aggregated polyhedrin protein gradually gained its active conformation accompanying progress of BmNPV infection. At 48 h p.i. recovered polyhedrin bound directly to Bombyx mori microtubule-associated protein 1-light chain 3 (BmLC3), an autophagosome marker, and was colocalized with BmLC3 to the isolation membrane of autophagosome, implying the involvement of polyhedrin in cellular autophagy. Inhibition of autophagy by 3-methyladenine (3-MA) dramatically resulted in decrease of polyhedrin expression and polyhedra particle production. These observations suggested that highly expressed polyhedrin forms aggregate to get involved in cellular autophagy then play an important role in polyhedra production.
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37
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Ho CT, Chang YJ, Yang LX, Wei PL, Liu TZ, Liu JJ. A Novel Microtubule-Disrupting Agent Induces Endoplasmic Reticular Stress-Mediated Cell Death in Human Hepatocellular Carcinoma Cells. PLoS One 2015; 10:e0136340. [PMID: 26355599 PMCID: PMC4565632 DOI: 10.1371/journal.pone.0136340] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 07/31/2015] [Indexed: 01/27/2023] Open
Abstract
Here, we present evidence of a novel microtubule-disrupting agent, N-deacetyl-N-(chromone-2-carbonyl)-thiocolchicine (TCD), exhibiting potent antitumor activity (with IC50 values in the nanomolar range) against hepatocellular carcinoma cell lines. Cell cycle analysis revealed that TCD induced G2/M cell-cycle arrest in a dose- and time-dependent manner in both Hep-J5 and Mahlavu HCC cell lines. TCD also induced a decrease in mitochondrial membrane potential (ΔΨm) and caused DNA damage. Mechanistically, TCD activated protein kinase RNA-like endoplasmic reticular kinase and several transcription factors, including activating transcription factor (ATF) 6, ATF4, ATF3, and the CCAAT-enhancer binding protein homologous protein. These data clearly demonstrate that the antitumor activity of TCD is mechanistically linked to its capacity to trigger both intrinsic and extrinsic apoptotic cell death via endoplasmic reticular stress pathway. The potent antitumor activity of TCD was similarly demonstrated in a hepatocellular carcinoma xenograft model, where 5 and 10 mg/kg doses of TCD significantly arrested Hep-J5 and Mahlavu tumor growth. Our finding suggests that TCD is a promising therapeutic agent against hepatocellular carcinoma; further translational assessment of its clinical usage is warranted.
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Affiliation(s)
- Chun-Te Ho
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan; School of Medical Laboratory Science and Biotechnology, Taipei Medical University, Taipei, Taiwan
| | - Yu-Jia Chang
- Translational Research Laboratory, Cancer Center, Taipei Medical University and Hospital, Taipei, Taiwan; Department of Surgery, Taipei Medical University and Hospital, Taipei, Taiwan
| | - Li-Xi Yang
- Radiobiology Laboratory, California Pacific Medical Center Research Institute, San Francisco, CA, United States of America; St. Mary's Medical Center, San Francisco, CA, United States of America
| | - Po-Li Wei
- Translational Research Laboratory, Cancer Center, Taipei Medical University and Hospital, Taipei, Taiwan; Department of Surgery, Taipei Medical University and Hospital, Taipei, Taiwan
| | - Tsan-Zon Liu
- Translational Research Laboratory, Cancer Center, Taipei Medical University and Hospital, Taipei, Taiwan
| | - Jun-Jen Liu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan; School of Medical Laboratory Science and Biotechnology, Taipei Medical University, Taipei, Taiwan
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38
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Khachatoorian C, Ramirez RA, Hernandez F, Serna R, Kwok EY. Overexpressed Arabidopsis Annexin4 accumulates in inclusion body-like structures. Acta Histochem 2015; 117:279-87. [PMID: 25818562 PMCID: PMC4409563 DOI: 10.1016/j.acthis.2015.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 03/06/2015] [Accepted: 03/06/2015] [Indexed: 12/31/2022]
Abstract
Large protein complexes form in the cytosol of prokaryotes and eukaryotes as assemblies of functional enzymes or aggregates of misfolded proteins. Their roles in the cell range from critical components of metabolism to disease-causing agents. We have observed a novel structure in the cells of transgenic Arabidopsis thaliana that appears to be a form of inclusion body. These long, spindle-shaped structures form when Arabidopsis are transformed to express high levels of the protein Annexin4 fused to a fluorescent protein. These structures, previously named darts, are visible in all cells of the plant throughout development. Darts take on a variety of morphologies including rings and figure-eights. These structures are not associated with the endomembrane system and are not membrane bounded. Darts appear to be insoluble aggregates of protein analogous to bacterial inclusion bodies and eukaryotic aggresomes. Similar structures have not been observed in untransformed plants, suggesting darts are artifacts of transgenic overexpression.
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Affiliation(s)
- Careen Khachatoorian
- Department of Biology, California State University Northridge, 18111 Nordhoff St., Northridge, CA 91330-8303, USA
| | - Rigoberto A Ramirez
- Department of Biology, California State University Northridge, 18111 Nordhoff St., Northridge, CA 91330-8303, USA
| | - Fernando Hernandez
- Department of Biology, California State University Northridge, 18111 Nordhoff St., Northridge, CA 91330-8303, USA
| | - Raphael Serna
- Department of Biology, California State University Northridge, 18111 Nordhoff St., Northridge, CA 91330-8303, USA
| | - Ernest Y Kwok
- Department of Biology, California State University Northridge, 18111 Nordhoff St., Northridge, CA 91330-8303, USA.
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Ji JA, Liu J, Wang YJ. Formulation Development for Antibody-Drug Conjugates. ANTIBODY-DRUG CONJUGATES 2015. [DOI: 10.1007/978-3-319-13081-1_5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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40
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Hao DC, Chen SL, Osbourn A, Kontogianni VG, Liu LW, Jordán MJ. Temporal transcriptome changes induced by methyl jasmonate in Salvia sclarea. Gene 2014; 558:41-53. [PMID: 25536164 DOI: 10.1016/j.gene.2014.12.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 12/18/2014] [Accepted: 12/19/2014] [Indexed: 10/24/2022]
Abstract
Salvia sclarea is a traditional medicinal and aromatic plant that grows in Europe and produces various economically important compounds, including phenylpropanoid derivatives and terpenoids. Methyl jasmonate (MeJA) is commonly used to elicit plant stress responses. However, how MeJA enhances production of secondary metabolites in S. sclarea is not well understood. We performed a genome-wide analysis of temporal gene expression in S. sclarea leaves and roots. The transcriptome profiles 0, 10 and 26 h after MeJA treatment were analyzed by Illumina RNA-Seq. A total of 16,142 isogenes (average length 866bp; N50 1035bp) were obtained by de novo assembly of 35,757,567 raw sequencing reads. When these sequencing reads were mapped onto the assembled Unigenes, 3236, 2792 and 798 Unigenes were found to be expressed differentially between 0 and 10h, 0 and 26 h, and 10 and 26h, respectively. These included many secondary metabolite biosynthesis, stress and defense-related genes. A qRT-PCR analysis confirmed the expression profiles of selected differentially expressed genes (DEGs) revealed by RNA-Seq data, and also extended our analysis of differential gene expression to 73 h. Our investigations revealed temporal differences in the responses of S. sclarea to MeJA treatment. MeJA treatment induced the expression of a large number of genes involved in phenylpropanoid biosynthesis, especially between 0 and 10h, and 0 and 26 h. Additionally, many genes encoding transcription factors, cytochrome P450s, glycosyltransferases, methyltransferases and transporters were shown to respond to MeJA elicitation. DEGs related to structural molecule activity and cell death showed a significant temporal variation. A chromatographic analysis of metabolites at 26h, 73h and six days after MeJA treatment indicated that these transcriptomic changes precede MeJA-induced changes in secondary metabolite content. This study sheds light on the molecular mechanisms of MeJA elicitation and is helpful in understanding how exogenous MeJA treatment mediates extensive plant transcriptome reprogramming/remodeling. Our results can be utilized to characterize genes related to secondary metabolism and their regulation, and in breeding S. sclarea for desirable chemotypes.
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Affiliation(s)
- Da Cheng Hao
- Biotechnology Institute, School of Environment, Dalian Jiaotong University, Dalian 116028, China.
| | - Shi Lin Chen
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Anne Osbourn
- Department of Metabolic Biology, John Innes Centre, Norwich NR4 7UH, UK.
| | | | - Li Wei Liu
- Department of Mathematics, School of Science, Dalian Jiaotong University, Dalian 116028, China
| | - Maria J Jordán
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Departamento de Recursos Naturales y Desarrollo Rural, C./Mayor s/n, 30150 La Alberca, Murcia, Spain
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Kruszka K, Pacak A, Swida-Barteczka A, Nuc P, Alaba S, Wroblewska Z, Karlowski W, Jarmolowski A, Szweykowska-Kulinska Z. Transcriptionally and post-transcriptionally regulated microRNAs in heat stress response in barley. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:6123-35. [PMID: 25183744 PMCID: PMC4203144 DOI: 10.1093/jxb/eru353] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Heat stress is one of the major abiotic factors that can induce severe plant damage, leading to a decrease in crop plant productivity. Despite barley being a cereal of great economic importance, few data are available concerning its thermotolerance mechanisms. In this work microRNAs (miRNAs) involved in heat stress response in barley were investigated. The level of selected barley mature miRNAs was examined by hybridization. Quantitative real-time PCR (RT-qPCR) was used to monitor the changes in the expression profiles of primary miRNA (pri-miRNA) precursors, as well as novel and conserved target genes during heat stress. The miRNA-mediated cleavage sites in the target transcripts were confirmed by degradome analysis and the 5' RACE (rapid amplification of cDNA ends) approach. Four barley miRNAs (miR160a, 166a, 167h, and 5175a) were found which are heat stress up-regulated at the level of both mature miRNAs and precursor pri-miRNAs. Moreover, the splicing of introns hosting miR160a and miR5175a is also heat induced. The results demonstrate transcriptional and post-transcriptional regulation of heat-responsive miRNAs in barley. The observed induction of miRNA expression is correlated with the down-regulation of the expression level of their experimentally identified new and conservative target genes.
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Affiliation(s)
- Katarzyna Kruszka
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
| | - Andrzej Pacak
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
| | - Aleksandra Swida-Barteczka
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
| | - Przemyslaw Nuc
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
| | - Sylwia Alaba
- Bioinformatics Laboratory, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
| | - Zuzanna Wroblewska
- Bioinformatics Laboratory, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
| | - Wojciech Karlowski
- Bioinformatics Laboratory, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
| | - Artur Jarmolowski
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
| | - Zofia Szweykowska-Kulinska
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland Bioinformatics Laboratory, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Umultowska 89, 61-614 Poznan, Poland
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Preconditioning stimulus of proteasome inhibitor enhances aggresome formation and autophagy in differentiated SH-SY5Y cells. Neurosci Lett 2014; 566:263-8. [DOI: 10.1016/j.neulet.2014.02.056] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 02/18/2014] [Accepted: 02/25/2014] [Indexed: 01/16/2023]
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Distinct patterns of HSP30 and HSP70 degradation in Xenopus laevis A6 cells recovering from thermal stress. Comp Biochem Physiol A Mol Integr Physiol 2013; 168:1-10. [PMID: 24231468 DOI: 10.1016/j.cbpa.2013.10.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 10/30/2013] [Accepted: 10/31/2013] [Indexed: 11/22/2022]
Abstract
Heat shock proteins (HSPs) are molecular chaperones that assist in protein synthesis, folding and degradation and prevent stress-induced protein aggregation. In this study, we examined the pattern of accumulation of HSP30 and HSP70 in Xenopus laevis A6 kidney epithelial cells recovering from heat shock. Immunoblot analysis revealed the presence of elevated levels of HSP30 after 72h of recovery. However, the relative levels of HSP70 declined to near control levels after 24h. The relative levels of both hsp30 and hsp70 mRNA were reduced to low levels after 24h of recovery from heat shock. Pretreatment of cells with cycloheximide, a translational inhibitor, produced a rapid decline in HSP70 but not HSP30. The cycloheximide-associated decline of HSP70 was blocked by the proteasomal inhibitor, MG132, but had little effect on the relative level of HSP30. Also, treatment of cells with the phosphorylation inhibitor, SB203580, in addition to cycloheximide treatment enhanced the stability of HSP30 compared to cycloheximide alone. Immunocytochemical studies detected the presence of HSP30 accumulation in a granular pattern in the cytoplasm of recovering cells and its association with aggresome-like structures, which was enhanced in the presence of SB203580. This study has shown that the relative levels of heat shock-induced HSP30 persist during recovery in contrast to HSP70. While HSP70 is degraded by the ubiquitin-proteasome system, it is likely that the presence of HSP30 multimeric complexes that are known to associate with unfolded protein as well as its association with aggresome-like structures may delay its degradation.
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