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Sun H, Jiang M, Fu X, Cai Q, Zhang J, Yin Y, Guo J, Yu L, Jiang Y, Liu Y, Feng L, Nie Z, Fang J, Jin L. Mesencephalic astrocyte-derived neurotrophic factor reduces cell apoptosis via upregulating HSP70 in SHSY-5Y cells. Transl Neurodegener 2017; 6:12. [PMID: 28536652 PMCID: PMC5439129 DOI: 10.1186/s40035-017-0082-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 05/03/2017] [Indexed: 12/17/2022] Open
Abstract
Background Mesencephalic astrocyte-derived neurotrophic factor (MANF) is a new candidate growth factor for dopaminergic neurons against endoplasmic reticulum stress (ER stress). HSP70 family, a chaperon like heat shock protein family, was proved to be involved in the MANF induced survival pathway in 6-OHDA treated SHSY-5Y cells. However, the ER stress relative transcriptome, in MANF signaling cascades is still investigated. The involvement of HSP70, a 70kd member of HSP70 family, need further to be verified. Methods The cell apoptosis was assayed by MTT, TUNEL staining and western blot of cleaved Caspase-3. The differentially expressed genes in SHSY-5Y cells under different conditions (control, 6-OHDA, 6-OHDA + MANF) were investigated by RNA-seq. Expression of HSP70 was further confirmed by real-time PCR. RNAi knockdown for HSP70 was performed to investigate the role of HSP70 in the MANF signaling pathway. Results MANF inhibits 6-OHDA-induced apoptosis in SHSY-5Y cells. Six ER stress relative genes (HSP70, GRP78, xbp-1, ATF-4, ATF-6, MAPK) were found enriched in 6-OHDA + MANF treatment group. HSP70 was the most significantly up-regulated gene under 6-OHDA + MANF treatment in SHSY-5Y cells. RNAi knockdown for HSP70 inhibits the protective effects of MANF against 6-OHDA toxicity in SHSY-5Y cells. Conclusion MANF exerts a protective role against 6-OHDA induced apoptosis in SHSY-5Y cells via up-regulating some ER stress genes, including HSP70 family members. The HSP70 expression level plays a key role in MANF-mediated survival pathway.
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Affiliation(s)
- Hui Sun
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai, 200065 People's Republic of China
| | - Ming Jiang
- School of Life Science and Technology, Tongji University, 1239 Siping Road, Shanghai, 200092 People's Republic of China.,Biomedical Research Center, Tongji University Suzhou Institute, Building 2, 198 Jinfeng Road, Wuzhong District, Suzhou, Jiangsu 215101 China
| | - Xing Fu
- Biomedical Research Center, Tongji University Suzhou Institute, Building 2, 198 Jinfeng Road, Wuzhong District, Suzhou, Jiangsu 215101 China
| | - Qiong Cai
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai, 200065 People's Republic of China
| | - Jingxing Zhang
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai, 200065 People's Republic of China
| | - Yanxin Yin
- Biomedical Research Center, Tongji University Suzhou Institute, Building 2, 198 Jinfeng Road, Wuzhong District, Suzhou, Jiangsu 215101 China
| | - Jia Guo
- Biomedical Research Center, Tongji University Suzhou Institute, Building 2, 198 Jinfeng Road, Wuzhong District, Suzhou, Jiangsu 215101 China
| | - Lihua Yu
- Biomedical Research Center, Tongji University Suzhou Institute, Building 2, 198 Jinfeng Road, Wuzhong District, Suzhou, Jiangsu 215101 China
| | - Yun Jiang
- Biomedical Research Center, Tongji University Suzhou Institute, Building 2, 198 Jinfeng Road, Wuzhong District, Suzhou, Jiangsu 215101 China
| | - Yigang Liu
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai, 200065 People's Republic of China
| | - Liang Feng
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai, 200065 People's Republic of China
| | - Zhiyu Nie
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai, 200065 People's Republic of China
| | - Jianmin Fang
- School of Life Science and Technology, Tongji University, 1239 Siping Road, Shanghai, 200092 People's Republic of China
| | - Lingjing Jin
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai, 200065 People's Republic of China
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López-Vidal J, Gómez-Sebastián S, Sánchez-Ramos I, Escribano JM. Characterization of a Trichoplusia ni hexamerin-derived promoter in the AcMNPV baculovirus vector. J Biotechnol 2013; 165:201-8. [PMID: 23578810 DOI: 10.1016/j.jbiotec.2013.03.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 03/18/2013] [Accepted: 03/21/2013] [Indexed: 12/24/2022]
Abstract
The promoter sequences of the encoding genes for the three most abundant hexamerins of the Lepidoptera Trichoplusia ni were isolated and cloned into the Autographa californica multiple nucleopolyhedrovirus (AcMNPV)-derived baculovirus expression vector. From the sequences analyzed, the DNA region driving the expression of the Basic juvenile hormone-suppressible protein 2 (BJHSP-2), denominated pB2, presented the highest promoter strength in the context of the baculovirus vector in Sf21 insect cells. This promoter activity occurred earlier in baculovirus-infected cells than that achieved by a conventional polyhedrin promoter (polh), but surprisingly stopped at 48h post-infection. A mapping of pB2 essential promoter elements determined that a region of about 400bp, denominated pB29, retained and even increased the transcriptional activity with respect to the parental full-length sequence. Finally, several chimeric combinations of the insect-derived pB2 with the virus-derived conventional polh or p10 promoters were constructed and incorporated into an AcMNPV baculovirus vector. The pB2-p10 combination showed increased recombinant protein expression at early times post-infection and similar expression levels at very late times post-infection in Sf21 cells with respect to conventional late promoters. To the best of our knowledge, pB2 is the first promoter isolated from the Lepidoptera T. ni, the natural host of AcMNPV, to be assayed in a baculovirus expression vector.
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Affiliation(s)
- Javier López-Vidal
- Alternative Gene Expression S.L. (ALGENEX), Centro Empresarial, Parque Científico y Tecnológico de la Universidad Politécnica de Madrid, Campus de Montegancedo, 28223 Pozuelo de Alarcón, Madrid, Spain
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Sokolenko S, George S, Wagner A, Tuladhar A, Andrich JMS, Aucoin MG. Co-expression vs. co-infection using baculovirus expression vectors in insect cell culture: Benefits and drawbacks. Biotechnol Adv 2012; 30:766-81. [PMID: 22297133 PMCID: PMC7132753 DOI: 10.1016/j.biotechadv.2012.01.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 01/13/2012] [Accepted: 01/17/2012] [Indexed: 12/12/2022]
Abstract
The baculovirus expression vector system (BEVS) is a versatile and powerful platform for protein expression in insect cells. With the ability to approach similar post-translational modifications as in mammalian cells, the BEVS offers a number of advantages including high levels of expression as well as an inherent safety during manufacture and of the final product. Many BEVS products include proteins and protein complexes that require expression from more than one gene. This review examines the expression strategies that have been used to this end and focuses on the distinguishing features between those that make use of single polycistronic baculovirus (co-expression) and those that use multiple monocistronic baculoviruses (co-infection). Three major areas in which researchers have been able to take advantage of co-expression/co-infection are addressed, including compound structure-function studies, insect cell functionality augmentation, and VLP production. The core of the review discusses the parameters of interest for co-infection and co-expression with time of infection (TOI) and multiplicity of infection (MOI) highlighted for the former and the choice of promoter for the latter. In addition, an overview of modeling approaches is presented, with a suggested trajectory for future exploration. The review concludes with an examination of the gaps that still remain in co-expression/co-infection knowledge and practice.
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Affiliation(s)
- Stanislav Sokolenko
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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García-Fruitós E, Sabate R, de Groot NS, Villaverde A, Ventura S. Biological role of bacterial inclusion bodies: a model for amyloid aggregation. FEBS J 2011; 278:2419-27. [PMID: 21569209 DOI: 10.1111/j.1742-4658.2011.08165.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Inclusion bodies are insoluble protein aggregates usually found in recombinant bacteria when they are forced to produce heterologous protein species. These particles are formed by polypeptides that cross-interact through sterospecific contacts and that are steadily deposited in either the cell's cytoplasm or the periplasm. An important fraction of eukaryotic proteins form inclusion bodies in bacteria, which has posed major problems in the development of the biotechnology industry. Over the last decade, the fine dissection of the quality control system in bacteria and the recognition of the amyloid-like architecture of inclusion bodies have provided dramatic insights on the dynamic biology of these aggregates. We discuss here the relevant aspects, in the interface between cell physiology and structural biology, which make inclusion bodies unique models for the study of protein aggregation, amyloid formation and prion biology in a physiologically relevant background.
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Affiliation(s)
- Elena García-Fruitós
- Institute for Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Barcelona, Spain
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Martínez-Alonso M, Villaverde A, Ferrer-Miralles N. Cross-system excision of chaperone-mediated proteolysis in chaperone-assisted recombinant protein production. Bioeng Bugs 2011; 1:148-50. [PMID: 21326941 DOI: 10.4161/bbug.1.2.11048] [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: 12/20/2009] [Accepted: 12/29/2009] [Indexed: 11/19/2022] Open
Abstract
Main Escherichia coli cytosolic chaperones such as DnaK are key components of the control quality network designed to minimize the prevalence of polypeptides with aberrant conformations. This is achieved by both favoring refolding activities but also stimulating proteolytic degradation of folding reluctant species. This last activity is responsible for the decrease of the proteolytic stability of recombinant proteins when co-produced along with DnaK, where an increase in solubility might be associated to a decrease in protein yield. However, when DnaK and its co-chaperone DnaJ are co-produced in cultured insect cells or whole insect larvae (and expectedly, in other heterologous hosts), only positive, folding-related effects of these chaperones are observed, in absence of proteolysis-mediated reduction of recombinant protein yield.
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Affiliation(s)
- Mónica Martínez-Alonso
- Institut de Biotecnologia i de Biomedicina and Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, and CIBER de Bioingeniería, Biomateriales y Nanomedicina, Barcelona, Spain
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Side effects of chaperone gene co-expression in recombinant protein production. Microb Cell Fact 2010; 9:64. [PMID: 20813055 PMCID: PMC2944165 DOI: 10.1186/1475-2859-9-64] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 09/02/2010] [Indexed: 12/14/2022] Open
Abstract
Insufficient availability of molecular chaperones is observed as a major bottleneck for proper protein folding in recombinant protein production. Therefore, co-production of selected sets of cell chaperones along with foreign polypeptides is a common approach to increase the yield of properly folded, recombinant proteins in bacterial cell factories. However, unbalanced amounts of folding modulators handling folding-reluctant protein species might instead trigger undesired proteolytic activities, detrimental regarding recombinant protein stability, quality and yield. This minireview summarizes the most recent observations of chaperone-linked negative side effects, mostly focusing on DnaK and GroEL sets, when using these proteins as folding assistant agents. These events are discussed in the context of the complexity of the cell quality network and the consequent intricacy of the physiological responses triggered by protein misfolding.
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