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Bickel D, Vranken W. Effects of Phosphorylation on Protein Backbone Dynamics and Conformational Preferences. J Chem Theory Comput 2024; 20:4998-5011. [PMID: 38830621 PMCID: PMC11210476 DOI: 10.1021/acs.jctc.4c00206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/22/2024] [Accepted: 05/22/2024] [Indexed: 06/05/2024]
Abstract
Phosphorylations are the most common and extensively studied post-translational modification (PTM) of proteins in eukaryotes. They constitute a major regulatory mechanism, modulating protein function, protein-protein interactions, as well as subcellular localization. Phosphorylation sites are preferably located in intrinsically disordered regions and have been shown to trigger structural rearrangements and order-to-disorder transitions. They can therefore have a significant effect on protein backbone dynamics or conformation, but only sparse experimental data are available. To obtain a more general description of how and when phosphorylations have a significant effect on protein behavior, molecular dynamics (MD) currently provides the only suitable framework to study these effects at a large scale in atomistic detail. This study develops a systematic MD simulation framework to explore the influence of phosphorylations on the local backbone dynamics and conformational propensities of proteins. Through a series of glycine-backbone peptides, we studied the effects of amino acid residues including the three most common phosphorylations (Ser, Thr, and Tyr), on local backbone dynamics and conformational propensities. We further extended our study to investigate the interactions of all such residues between position i to positions i + 1, i + 2, i + 3, and i + 4 in such peptides. The final data set comprises structural ensembles for 3393 sequences with more than 1 μs of sampling for each ensemble. To validate the relevance of the results, the structural and conformational properties extracted from the MD simulations are compared to NMR data from the Biological Magnetic Resonance Data Bank. The systematic nature of this study enables the projection of the gained knowledge onto any phosphorylation site in the proteome and provides a general framework for the study of further PTMs. The full data set is publicly available, as a training and reference set.
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Affiliation(s)
- David Bickel
- Interuniversity
Institute of Bioinformatics in Brussels, 1050 Brussels, Belgium
- Structural
Biology Brussels, Vrije Universiteit Brussels, 1050 Brussels, Belgium
| | - Wim Vranken
- Interuniversity
Institute of Bioinformatics in Brussels, 1050 Brussels, Belgium
- Structural
Biology Brussels, Vrije Universiteit Brussels, 1050 Brussels, Belgium
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2
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Vašek D, Fikarová N, Marková VN, Honc O, Pacáková L, Porubská B, Somova V, Novotný J, Melkes B, Krulová M. Lipopolysaccharide pretreatment increases the sensitivity of the TRPV1 channel and promotes an anti-inflammatory phenotype of capsaicin-activated macrophages. J Inflamm (Lond) 2024; 21:17. [PMID: 38790047 PMCID: PMC11127439 DOI: 10.1186/s12950-024-00391-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
BACKGROUND The transient receptor potential vanilloid 1 (TRPV1) is well-established in neuronal function, yet its role in immune reactions remains enigmatic. The conflicting data on its inflammatory role, suggesting both pro-inflammatory and anti-inflammatory effects upon TRPV1 stimulation in immune cells, adds complexity. To unravel TRPV1 immunomodulatory mechanisms, we investigated how the TRPV1 agonist capsaicin influences lipopolysaccharide (LPS)-induced pro-inflammatory macrophage phenotypes. RESULTS Changes in the surface molecules, cytokine production, and signaling cascades linked to the phenotype of M1 or M2 macrophages of the J774 macrophage cell line and bone marrow-derived macrophages, treated with capsaicin before or after the LPS-induced inflammatory reaction were determined. The functional capacity of macrophages was also assessed by infecting the stimulated macrophages with the intracellular parasite Leishmania mexicana. CONCLUSION Our findings reveal that TRPV1 activation yields distinct macrophage responses influenced by the inflammatory context. LPS pre-treatment followed by capsaicin activation prompted increased calcium influx, accompanied by a shift toward an anti-inflammatory M2b-like polarization state.
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Affiliation(s)
- Daniel Vašek
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Natálie Fikarová
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Vendula Nagy Marková
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Ondřej Honc
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Lenka Pacáková
- Department of Parasitology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Bianka Porubská
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Veronika Somova
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Jiří Novotný
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Barbora Melkes
- Department of Physiology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic
| | - Magdaléna Krulová
- Department of Cell Biology, Faculty of Science, Charles University, Vinicna 7, Prague, 2, 128 43, Czech Republic.
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3
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Suman I, Šimić L, Čanadi Jurešić G, Buljević S, Klepac D, Domitrović R. The interplay of mitophagy, autophagy, and apoptosis in cisplatin-induced kidney injury: involvement of ERK signaling pathway. Cell Death Discov 2024; 10:98. [PMID: 38402208 PMCID: PMC10894217 DOI: 10.1038/s41420-024-01872-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 02/07/2024] [Accepted: 02/15/2024] [Indexed: 02/26/2024] Open
Abstract
AKI induced by CP chemotherapy remains an obstacle during patient treatments. Extracellular signal-regulated protein kinases 1/2 (ERK), key participants in CP-induced nephrotoxicity, are suggested to be involved in the regulation of mitophagy, autophagy, and apoptosis. Human renal proximal tubular cells (HK-2) and BALB/cN mice were used to determine the role of ERK in CP-induced AKI. We found that active ERK is involved in cell viability reduction during apoptotic events but exerts a protective role in the early stages of treatment. Activation of ERK acts as a maintainer of the mitochondrial population and is implicated in mitophagy initiation but has no significant role in its conduction. In the late stages of CP treatment when ATP is deprived, general autophagy that requires ERK activation is initiated as a response, in addition to apoptosis activation. Furthermore, activation of ERK is responsible for the decrease in reserve respiratory capacity and controls glycolysis regulation during CP treatment. Additionally, we found that ERK activation is also required for the induction of NOXA gene and protein expression as well as FoxO3a nuclear translocation, but not for the regular ERK-induced phosphorylation of FoxO3a on Ser294. In summary, this study gives detailed insight into the involvement of ERK activation and its impact on key cellular processes at different time points during CP-induced kidney injury. Inhibitors of ERK activation, including Mirdametinib, are important in the development of new therapeutic strategies for the treatment of AKI in patients receiving CP chemotherapy.
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Affiliation(s)
- Iva Suman
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, Faculty of Medicine, University of Rijeka, Rijeka, Croatia.
| | - Lidija Šimić
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
- Point-of-Care Laboratory, Emergency Department Sušak, Clinical Hospital Center Rijeka, Rijeka, Croatia
| | - Gordana Čanadi Jurešić
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
| | - Sunčica Buljević
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
| | - Damir Klepac
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
- Centre for Micro- and Nanosciences and Technologies, University of Rijeka, Rijeka, Croatia
| | - Robert Domitrović
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, Faculty of Medicine, University of Rijeka, Rijeka, Croatia.
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Sun Y, Lu Z, Taylor JA, Au JLS. Quantitative image analysis of intracellular protein translocation in 3-dimensional tissues for pharmacodynamic studies of immunogenic cell death. J Control Release 2024; 365:89-100. [PMID: 37981052 PMCID: PMC11078532 DOI: 10.1016/j.jconrel.2023.11.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 11/05/2023] [Accepted: 11/12/2023] [Indexed: 11/21/2023]
Abstract
A recent development in cancer chemotherapy is to use cytotoxics to induce tumor-specific immune response through immunogenic cell death (ICD). In ICD, calreticulin is translocated from endoplasmic reticulum to cell membrane (ecto-CRT) which serves as the 'eat-me-signal' to antigen-presenting cells. Ecto-CRT measurements, e.g., by ecto-CRT immunostaining plus flow cytometry, can be used to study the pharmacodynamics of ICD in single cells, whereas ICD studies in intact 3-dimensional tissues such as human tumors require different approaches. The present study described a method that used (a) immunostaining with fluorescent antibodies followed by confocal microscopy to obtain the spatial locations of two molecules-of-interest (CRT and a marker protein WGA), and (b) machine-learning (trainable WEKA segmentation) and additional image processing tools to locate the target molecules, remove the interfering signals in the nucleus, cytosol and extracellular space, enable the distinction of the inner and outer edges of the cell membrane and thereby identify the cells with ecto-CRT. This method, when applied to 3-dimensional human bladder cancer cell spheroids, yielded drug-induced ecto-CRT measurements that were qualitatively comparable to the flow cytometry results obtained with single cells disaggregated from spheroids. This new method was applied to study drug-induced ICD in short-term cultures of surgical specimens of human patient bladder tumors.
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Affiliation(s)
- Yajing Sun
- Department of Pharmaceutical Sciences, University of Oklahoma, Oklahoma City, OK 73117, United States of America
| | - Ze Lu
- Institute of Quantitative Systems Pharmacology, Carlsbad, CA 92008, United States of America; Optimum Therapeutics LLC, Carlsbad, CA 92008, United States of America
| | - John A Taylor
- Department of Urology, University of Kansas Medical Center, Kansas City, KS 66160, United States of America
| | - Jessie L S Au
- Department of Pharmaceutical Sciences, University of Oklahoma, Oklahoma City, OK 73117, United States of America; Institute of Quantitative Systems Pharmacology, Carlsbad, CA 92008, United States of America; Optimum Therapeutics LLC, Carlsbad, CA 92008, United States of America; College of Pharmacy, Taipei Medical University, Taipei, Taiwan.
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5
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Wang Y, Wang X, Tang T, Xie Y, Li J, Wang W, Li T, Liu D, Yang K, Shi Y, Sun J, Guo D, Zou J, Bai F, Sun Y, Zhang X, Wang C. Basis with RNA-Seq and WGCNA to explore the effect of Frankincense essential oil on dextran sodium sulfate-induced ulcerative colitis through MAPK/NF-κB signaling. Fitoterapia 2024; 172:105744. [PMID: 37952762 DOI: 10.1016/j.fitote.2023.105744] [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: 09/05/2023] [Accepted: 11/07/2023] [Indexed: 11/14/2023]
Abstract
PURPOSE Frankincense has been shown in studies to have healing benefits for people with ulcerative colitis (UC). However, its underlying mechanisms have not been fully investigated. The objective of this study was to explore the potential molecular mechanisms of Frankincense essential oil (FREO) in improving dextran sodium sulfate (DSS)-induced UC from multiple perspectives. METHODS The FREO components were analyzed by GC-MS, and the interactions between the key active components and the mechanism of FREO were determined based on RNA-seq, "quantity-effect" weighting coefficient network pharmacology, WGCNA and pharmacodynamic experiments. The protection of FREO against DSS-induced UC mice was assessed by behavioral and pathological changes through mice. The expression of pro-inflammatory cytokines was measured using enzyme-linked immunosorbent assay. The expression of MAPK and NF-κB-related proteins by the Western Blotting and immunohistochemistry method. RESULTS Treatment with FREO significantly improved the symptoms of weight loss, diarrhea, stool blood, and colon shortening in UC mice. Reduced intestinal mucosal damage and the degree of inflammatory cell infiltration in the colon. Decreased TNF-α and IL-6 levels in mice's serum and inhibited phosphorylation of ERK, p65 in MAPK and NF-κB signaling. CONCLUSION FREO may decrease the inflammatory response to reduce the symptoms of UC by modulating the MAPK/ NF-κB pathway. This may be due to the synergistic interaction of the effective ingredient Hepten-2-yl tiglate, 6-methyl-5-, Isoneocembrene A and P-Cymene. This study provides a promising drug candidate and a new concept for the treatment of UC.
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Affiliation(s)
- Yujiao Wang
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Xiao Wang
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Tiantian Tang
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Yundong Xie
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Jia Li
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Wenfei Wang
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Taotao Li
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Ding Liu
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Kai Yang
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Yajun Shi
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Jing Sun
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Dongyan Guo
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Junbo Zou
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
| | - Fengyun Bai
- Shaanxi Dongtai Pharmaceutical Co., Ltd., Xianyang 712000, Shaanxi, China
| | - Ying Sun
- Shaanxi Dongtai Pharmaceutical Co., Ltd., Xianyang 712000, Shaanxi, China
| | - Xiaofei Zhang
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China; Shaanxi University Engineering Research Center of Chinese Medicine Aromatic Industry, Xianyang 712000, Shaanxi, China.
| | - Changli Wang
- Key Laboratory of Basicand New Drug Research of Traditional Chinese Medicine, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China; Shaanxi University Engineering Research Center of Chinese Medicine Aromatic Industry, Xianyang 712000, Shaanxi, China.
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6
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Li J, Dang P, Li Z, Zhao T, Cheng D, Pan D, Yuan Y, Song W. Peroxisomal ERK mediates Akh/glucagon action and glycemic control. Cell Rep 2023; 42:113200. [PMID: 37796662 DOI: 10.1016/j.celrep.2023.113200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/18/2023] [Accepted: 09/15/2023] [Indexed: 10/07/2023] Open
Abstract
The enhanced response of glucagon and its Drosophila homolog, adipokinetic hormone (Akh), leads to high-caloric-diet-induced hyperglycemia across species. While previous studies have characterized regulatory components transducing linear Akh signaling promoting carbohydrate production, the spatial elucidation of Akh action at the organelle level still remains largely unclear. In this study, we find that Akh phosphorylates extracellular signal-regulated kinase (ERK) and translocates it to peroxisome via calcium/calmodulin-dependent protein kinase II (CaMKII) cascade to increase carbohydrate production in the fat body, leading to hyperglycemia. The mechanisms include that ERK mediates fat body peroxisomal conversion of amino acids into carbohydrates for gluconeogenesis in response to Akh. Importantly, Akh receptor (AkhR) or ERK deficiency, importin-associated ERK retention from peroxisome, or peroxisome inactivation in the fat body sufficiently alleviates high-sugar-diet-induced hyperglycemia. We also observe mammalian glucagon-induced hepatic ERK peroxisomal translocation in diabetic subjects. Therefore, our results conclude that the Akh/glucagon-peroxisomal-ERK axis is a key spatial regulator of glycemic control.
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Affiliation(s)
- Jiaying Li
- Department of Hepatobiliary and Pancreatic Surgery, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, China; TaiKang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - Peixuan Dang
- Department of Hepatobiliary and Pancreatic Surgery, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, China; TaiKang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - Zhen Li
- Department of Hepatobiliary and Pancreatic Surgery, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, China
| | - Tujing Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
| | - Daojun Cheng
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
| | - Dingyu Pan
- Department of Hepatobiliary and Pancreatic Surgery, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, China.
| | - Yufeng Yuan
- Department of Hepatobiliary and Pancreatic Surgery, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, China; TaiKang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China.
| | - Wei Song
- Department of Hepatobiliary and Pancreatic Surgery, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei 430071, China; TaiKang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China.
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7
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Liu MD, Du Y, Koupaei SK, Kim NR, Zhang W, Traxler MF. Surface-active antibiotic production is a multifunctional adaptation for postfire microbes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.17.553728. [PMID: 37645719 PMCID: PMC10462131 DOI: 10.1101/2023.08.17.553728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Wildfires affect soils in multiple ways, leading to numerous challenges for colonizing microbes. While it is thought that fire-adapted microbes lie at the forefront of postfire ecosystem recovery, the specific strategies that these microbes use to thrive in burned soils remain largely unknown. Through bioactivity screening of bacterial isolates from burned soils, we discovered that several Paraburkholderia spp. isolates produced a set of unusual rhamnolipid surfactants with a natural methyl ester modification. These rhamnolipid methyl esters (RLMEs) exhibited enhanced antimicrobial activity against other postfire microbial isolates, including pyrophilous Pyronema fungi and Amycolatopsis bacteria, compared to the typical rhamnolipids made by organisms such as Pseudomonas spp . RLMEs also showed enhanced surfactant properties and facilitated bacterial motility on agar surfaces. In vitro assays further demonstrated that RLMEs improved aqueous solubilization of polycyclic aromatic hydrocarbons, which are potential carbon sources found in char. Identification of the rhamnolipid biosynthesis genes in the postfire isolate, Paraburkholderia caledonica str. F3, led to the discovery of rhlM , whose gene product is responsible for the unique methylation of rhamnolipid substrates. RhlM is the first characterized bacterial representative of a large class of integral membrane methyltransferases that are widespread in bacteria. These results indicate multiple roles for RLMEs in the postfire lifestyle of Paraburkholderia isolates, including enhanced dispersal, solubilization of potential nutrients, and inhibition of competitors. Our findings shed new light on the chemical adaptations that bacteria employ in order to navigate, grow, and outcompete other soil community members in postfire environments. Significance Statement Wildfires are increasing in frequency and intensity at a global scale. Microbes are the first colonizers of soil after fire events, but the adaptations that help these organisms survive in postfire environments are poorly understood. In this work, we show that a bacterium isolated from burned soil produces an unusual rhamnolipid biosurfactant that exhibits antimicrobial activity, enhances motility, and solubilizes potential nutrients derived from pyrolyzed organic matter. Collectively, our findings demonstrate that bacteria leverage specialized metabolites with multiple functions to meet the demands of life in postfire environments. Furthermore, this work reveals the potential of probing perturbed environments for the discovery of unique compounds and enzymes.
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8
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Wang H, Zhou HC, Ren RL, Du SX, Guo ZK, Shen XH. Apolipoprotein E2 inhibits mitochondrial apoptosis in pancreatic cancer cells through ERK1/2/CREB/BCL-2 signaling. Hepatobiliary Pancreat Dis Int 2023; 22:179-189. [PMID: 36243659 DOI: 10.1016/j.hbpd.2022.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 09/23/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND Apolipoprotein E2 (ApoE2) is a pleiotropic protein that influences several aspects of cancer metabolism and development. Evading apoptosis is a vital factor for facilitating cancer cell growth. However, the role and mechanism of ApoE2 in regulating cell apoptosis of pancreatic cancer remain unclear. METHODS In this study, we firstly detected the mRNA and protein expressions of ApoE2 in PANC-1 and Capan-2 cells by real-time polymerase chain reaction and Western blotting. We then performed TUNEL and flow cytometric analyses to explore the role of recombinant human ApoE2, pCMV6-ApoE2 and siApoE2 in the apoptosis of PANC-1 and Capan-2 cells. Furthermore, we investigated the molecular mechanism through which ApoE2 affected apoptosis in PANC-1 cells using immunofluorescence, immunoprecipitation, Western blotting and co-immunoprecipitation analysis. RESULTS ApoE2 phosphorylated ERK1/2 and inhibited pancreatic cancer cell apoptosis. In addition, our data showed that ApoE2/ERK1/2 altered the expression and mitochondrial localization of BCL-2 via activating CREB. ApoE2/ERK1/2/CREB also increased the total BCL-2/BAX ratio, inhibited the opening of the mitochondrial permeability transition pore and the depolarization of mitochondrial transmembrane potential, blocked the leakage of cytochrome-c and the formation of the apoptosome, and consequently, suppressed mitochondrial apoptosis. CONCLUSIONS ApoE2 regulates the mitochondrial localization and expression of BCL-2 through the activation of the ERK1/2/CREB signaling cascade to evade the mitochondrial apoptosis of pancreatic cancer cells. ApoE2 may be a distinct prognostic marker and a potential therapeutic target for pancreatic cancer.
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Affiliation(s)
- Hui Wang
- Tianjin Institute of Medical & Pharmaceutical Sciences, Tianjin 300020, China; School of Medicine, Nankai University, Tianjin 300071, China
| | - Hui-Chao Zhou
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Run-Ling Ren
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Shao-Xia Du
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Zhong-Kui Guo
- School of Medicine, Nankai University, Tianjin 300071, China
| | - Xiao-Hong Shen
- School of Medicine, Nankai University, Tianjin 300071, China.
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9
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Wainstein E, Maik-Rachline G, Blenis J, Seger R. AKTs do not translocate to the nucleus upon stimulation but AKT3 can constitutively signal from the nuclear envelope. Cell Rep 2022; 41:111733. [PMID: 36476861 DOI: 10.1016/j.celrep.2022.111733] [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: 04/19/2022] [Revised: 08/23/2022] [Accepted: 11/04/2022] [Indexed: 12/12/2022] Open
Abstract
AKT is a central signaling protein kinase that plays a role in the regulation of cellular survival metabolism and cell growth, as well as in pathologies such as diabetes and cancer. Human AKT consists of three isoforms (AKT1-3) that may fulfill different functions. Here, we report that distinct subcellular localization of the isoforms directly influences their activity and function. AKT1 is localized primarily in the cytoplasm, AKT2 in the nucleus, and AKT3 in the nucleus or nuclear envelope. None of the isoforms actively translocates into the nucleus upon stimulation. Interestingly, AKT3 at the nuclear envelope is constitutively phosphorylated, enabling a constant phosphorylation of TSC2 at this location. Knockdown of AKT3 induces moderate attenuation of cell proliferation of breast cancer cells. We suggest that in addition to the stimulation-induced activation of the lysosomal/cytoplasmic AKT1-TSC2 pathway, a subpopulation of TSC2 is constitutively inactivated by AKT3 at the nuclear envelope of transformed cells.
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Affiliation(s)
- Ehud Wainstein
- Department of Immunology and Regenerative Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Galia Maik-Rachline
- Department of Immunology and Regenerative Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - John Blenis
- Meyer Cancer Center and Department of Pharmacology, Weill Cornell Medical College, New York, NY 10021, USA
| | - Rony Seger
- Department of Immunology and Regenerative Biology, Weizmann Institute of Science, Rehovot 7610001, Israel.
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10
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Tortosa E, Sengupta Ghosh A, Li Q, Wong WR, Hinkle T, Sandoval W, Rose CM, Hoogenraad CC. Stress-induced vesicular assemblies of dual leucine zipper kinase are signaling hubs involved in kinase activation and neurodegeneration. EMBO J 2022; 41:e110155. [PMID: 35611591 PMCID: PMC9289706 DOI: 10.15252/embj.2021110155] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 11/09/2022] Open
Abstract
Mitogen-activated protein kinases (MAPKs) drive key signaling cascades during neuronal survival and degeneration. The localization of kinases to specific subcellular compartments is a critical mechanism to locally control signaling activity and specificity upon stimulation. However, how MAPK signaling components tightly control their localization remains largely unknown. Here, we systematically analyzed the phosphorylation and membrane localization of all MAPKs expressed in dorsal root ganglia (DRG) neurons, under control and stress conditions. We found that MAP3K12/dual leucine zipper kinase (DLK) becomes phosphorylated and palmitoylated, and it is recruited to sphingomyelin-rich vesicles upon stress. Stress-induced DLK vesicle recruitment is essential for kinase activation; blocking DLK-membrane interaction inhibits downstream signaling, while DLK recruitment to ectopic subcellular structures is sufficient to induce kinase activation. We show that the localization of DLK to newly formed vesicles is essential for local signaling. Inhibition of membrane internalization blocks DLK activation and protects against neurodegeneration in DRG neurons. These data establish vesicular assemblies as dynamically regulated platforms for DLK signaling during neuronal stress responses.
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Affiliation(s)
- Elena Tortosa
- Department of Neuroscience, Genentech, Inc., South San Francisco, CA, USA
| | | | - Qingling Li
- Department of Microchemistry, Proteomics and Lipidomics, Genentech, Inc., South San Francisco, CA, USA
| | - Weng Ruh Wong
- Department of Microchemistry, Proteomics and Lipidomics, Genentech, Inc., South San Francisco, CA, USA
| | - Trent Hinkle
- Department of Microchemistry, Proteomics and Lipidomics, Genentech, Inc., South San Francisco, CA, USA
| | - Wendy Sandoval
- Department of Microchemistry, Proteomics and Lipidomics, Genentech, Inc., South San Francisco, CA, USA
| | - Christopher M Rose
- Department of Microchemistry, Proteomics and Lipidomics, Genentech, Inc., South San Francisco, CA, USA
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11
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Pan X, Pei J, Wang A, Shuai W, Feng L, Bu F, Zhu Y, Zhang L, Wang G, Ouyang L. Development of small molecule extracellular signal-regulated kinases (ERKs) inhibitors for cancer therapy. Acta Pharm Sin B 2022; 12:2171-2192. [PMID: 35646548 PMCID: PMC9136582 DOI: 10.1016/j.apsb.2021.12.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/18/2021] [Accepted: 12/22/2021] [Indexed: 01/09/2023] Open
Abstract
The mitogen-activated protein kinase (MAPK)/extracellular signal-regulated kinase 1/2 (ERK1/2) signaling pathway is widely activated by a variety of extracellular stimuli, and its dysregulation is associated with the proliferation, invasion, and migration of cancer cells. ERK1/2 is located at the distal end of this pathway and rarely undergoes mutations, making it an attractive target for anticancer drug development. Currently, an increasing number of ERK1/2 inhibitors have been designed and synthesized for antitumor therapy, among which representative compounds have entered clinical trials. When ERK1/2 signal transduction is eliminated, ERK5 may provide a bypass route to rescue proliferation, and weaken the potency of ERK1/2 inhibitors. Therefore, drug research targeting ERK5 or based on the compensatory mechanism of ERK5 for ERK1/2 opens up a new way for oncotherapy. This review provides an overview of the physiological and biological functions of ERKs, focuses on the structure-activity relationships of small molecule inhibitors targeting ERKs, with a view to providing guidance for future drug design and optimization, and discusses the potential therapeutic strategies to overcome drug resistance.
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Affiliation(s)
- Xiaoli Pan
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Junping Pei
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Aoxue Wang
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Wen Shuai
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Lu Feng
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Faqian Bu
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Yumeng Zhu
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Lan Zhang
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Guan Wang
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Liang Ouyang
- State Key Laboratory of Biotherapy and Cancer Center, Innovation Center of Nursing Research, Nursing Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China
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12
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Yang K, Fan M, Wang X, Xu J, Wang Y, Gill PS, Ha T, Liu L, Hall JV, Williams DL, Li C. Lactate induces vascular permeability via disruption of VE-cadherin in endothelial cells during sepsis. SCIENCE ADVANCES 2022; 8:eabm8965. [PMID: 35476437 PMCID: PMC9045716 DOI: 10.1126/sciadv.abm8965] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Circulating lactate levels are a critical biomarker for sepsis and are positively correlated with sepsis-associated mortality. We investigated whether lactate plays a biological role in causing endothelial barrier dysfunction in sepsis. We showed that lactate causes vascular permeability and worsens organ dysfunction in CLP sepsis. Mechanistically, lactate induces ERK-dependent activation of calpain1/2 for VE-cadherin proteolytic cleavage, leading to the enhanced endocytosis of VE-cadherin in endothelial cells. In addition, we found that ERK2 interacts with VE-cadherin and stabilizes VE-cadherin complex in resting endothelial cells. Lactate-induced ERK2 phosphorylation promotes ERK2 disassociation from VE-cadherin. In vivo suppression of lactate production or genetic depletion of lactate receptor GPR81 mitigates vascular permeability and multiple organ injury and improves survival outcome in polymicrobial sepsis. Our study reveals that metabolic cross-talk between glycolysis-derived lactate and the endothelium plays a critical role in the pathophysiology of sepsis.
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Affiliation(s)
- Kun Yang
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
- Center of Excellence in Inflammation, Infectious Disease, and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
| | - Min Fan
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
- Center of Excellence in Inflammation, Infectious Disease, and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
| | - Xiaohui Wang
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
- Center of Excellence in Inflammation, Infectious Disease, and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
| | - Jingjing Xu
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Yana Wang
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - P. Spencer Gill
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Tuanzhu Ha
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
- Center of Excellence in Inflammation, Infectious Disease, and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
| | - Li Liu
- Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Jennifer V. Hall
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
- Center of Excellence in Inflammation, Infectious Disease, and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
| | - David L. Williams
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
- Center of Excellence in Inflammation, Infectious Disease, and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
| | - Chuanfu Li
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
- Center of Excellence in Inflammation, Infectious Disease, and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
- Corresponding author.
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13
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Yung Y, Yao Z, Hanoch T, Seger R. ERK1b, a 46-kDa ERK Isoform That Is Differentially Regulated by MEK. Cell Biol Int 2022; 46:1021-1035. [PMID: 35332606 PMCID: PMC9320930 DOI: 10.1002/cbin.11801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/27/2021] [Accepted: 01/08/2022] [Indexed: 11/25/2022]
Abstract
The extracellular signal‐regulated kinases (ERK) 1 and 2 (ERK1/2) are members of the mitogen‐activated protein kinase family. Using various stimulated rodent cells and kinase activation techniques, we identified a 46‐kDa ERK. The kinetics of activation of this ERK isoform was similar to that of ERK1 and ERK2 under most but not all circumstances. We purified this isoform from rat cells followed by its cloning. The sequence of this isoform revealed that it is an alternatively spliced version of the 44‐kDa ERK1 and therefore we termed it ERK1b. Interestingly, this isoform had a 26‐amino acid insertion between residues 340 and 341 of ERK1, which results from Intron 7 insertion to the sequence. Examining the expression pattern, we found that ERK1b is detected mainly in rat and particularly in Ras‐transformed Rat1 cells. In this cell line, ERK1b was more sensitive to extracellular stimulation than ERK1 and ERK2. Moreover, unlike ERK1 and ERK2, ERK1b had a very low binding affinity to MEK1. This low interaction led to nuclear localization of this isoform when expressed together with MEK1 under conditions in which ERK1 and ERK2 are retained in the cytoplasm. In addition, ERK1b was not coimmunoprecipitated with MEK1. We identified a new, 46‐kDa ERK alternatively spliced isoform. Our results indicate that this isoform is the major one to respond to exogenous stimulation in Ras‐transformed cells, probably due to its differential regulation by MAPK/ERK kinase and by phosphatases.
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Affiliation(s)
- Yuval Yung
- Department of Biological Regulation,, The Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Zhong Yao
- Department of Biological Regulation,, The Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Tamar Hanoch
- Department of Biological Regulation,, The Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Rony Seger
- Department of Biological Regulation,, The Weizmann Institute of Science, Rehovot, 76100, Israel
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14
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Maik-Rachline G, Wortzel I, Seger R. Alternative Splicing of MAPKs in the Regulation of Signaling Specificity. Cells 2021; 10:cells10123466. [PMID: 34943973 PMCID: PMC8699841 DOI: 10.3390/cells10123466] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 11/26/2021] [Accepted: 12/01/2021] [Indexed: 12/12/2022] Open
Abstract
The mitogen-activated protein kinase (MAPK) cascades transmit signals from extracellular stimuli to a variety of distinct cellular processes. The MAPKKs in each cascade specifically phosphorylate and activate their cognate MAPKs, indicating that this step funnels various signals into a seemingly linear pathway. Still, the effects of these cascades vary significantly, depending on the identity of the extracellular signals, which gives rise to proper outcomes. Therefore, it is clear that the specificity of the signals transmitted through the cascades is tightly regulated in order to secure the desired cell fate. Indeed, many regulatory components or processes that extend the specificity of the cascades have been identified. Here, we focus on a less discussed mechanism, that is, the role of distinct components in each tier of the cascade in extending the signaling specificity. We cover the role of distinct genes, and the alternatively spliced isoforms of MAPKKs and MAPKs, in the signaling specificity. The alternatively spliced MEK1b and ERK1c, which form an independent signaling route, are used as the main example. Unlike MEK1/2 and ERK1/2, this route’s functions are limited, including mainly the regulation of mitotic Golgi fragmentation. The unique roles of the alternatively spliced isoforms indicate that these components play an essential role in determining the proper cell fate in response to distinct stimulations.
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15
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He F, Wu Z, Wang Y, Yin L, Lu S, Dai L. Downregulation of tripartite motif protein 11 attenuates cardiomyocyte apoptosis after ischemia/reperfusion injury via DUSP1-JNK1/2. Cell Biol Int 2021; 46:148-157. [PMID: 34694031 PMCID: PMC9299661 DOI: 10.1002/cbin.11716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 10/09/2021] [Accepted: 10/16/2021] [Indexed: 11/11/2022]
Abstract
Currently, the prevention of ischemic diseases such as myocardial infarction associated with ischemia/reperfusion (I/R) injury remains to be a challenge. Thus, this study was designed to explore the effects of tripartite motif protein 11 (TRIM11) on cardiomyocytes I/R injury and its underlying mechanism. Cardiomyocytes AC16 were used to establish an I/R injury cell model. After TRIM11 downregulation in I/R cells, cell proliferation (0, 12, 24, and 48 h) and apoptosis at 48 h as well as the related molecular changes in oxidative stress‐related pathways was detected. Further, after the treatment of TRIM11 overexpression, SP600125, or DUSP1 overexpression, cell proliferation, apoptosis, and related genes were detected again. As per our findings, it was determined that TRIM11 was highly expressed in the cardiomyocytes AC16 after I/R injury. Downregulation of TRIM11 was determined to have significantly reduced I/R‐induced proliferation suppression and apoptosis. Besides, I/R‐activated c‐Jun N‐terminal kinase (JNK) signaling and cleaved caspase 3 and Bax expression were significantly inhibited by TRIM11 downregulation. In addition, the overexpression of TRIM11 significantly promoted apoptosis in AC16 cells, and JNK1/2 inhibition and DUSP1 overexpression potently counteracted the induction of TRIM11 overexpression in AC16 cells. These suggested that the downregulation of TRIM11 attenuates apoptosis in AC16 cells after I/R injury probably through the DUSP1‐JNK1/2 pathways.
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Affiliation(s)
- Fang He
- Shanghai Changning Mental Health Center, Shanghai, China
| | - Zheqian Wu
- Department of Emergency, Shidong Hospital of Yangpu District, Shanghai, China
| | - Yong Wang
- Department of Emergency, Shidong Hospital of Yangpu District, Shanghai, China
| | - Lili Yin
- Department of Emergency, Shidong Hospital of Yangpu District, Shanghai, China
| | - Shijie Lu
- Department of Emergency, Shidong Hospital of Yangpu District, Shanghai, China
| | - Lihua Dai
- Department of Emergency, Shidong Hospital of Yangpu District, Shanghai, China
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16
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Ouyang X, Wang Z, Luo M, Wang M, Liu X, Chen J, Feng J, Jia J, Wang X. Ketamine ameliorates depressive-like behaviors in mice through increasing glucose uptake regulated by the ERK/GLUT3 signaling pathway. Sci Rep 2021; 11:18181. [PMID: 34518608 PMCID: PMC8437933 DOI: 10.1038/s41598-021-97758-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 08/29/2021] [Indexed: 02/06/2023] Open
Abstract
To investigate the effects of ketamine on glucose uptake and glucose transporter (GLUT) expression in depressive-like mice. After HA1800 cells were treated with ketamine, 2-[N-(7-Nitrobenz-2-oxa-1,3-diazol-4-yl)Amino]-2-Deoxyglucose (2-NBDG) was added to the cells to test the effects of ketamine on glucose uptake, production of lactate, and expression levels of GLUT, ERK1/2, AKT, and AMPK. Adult female C57BL/6 mice were subjected to chronic unpredictable mild stress (CUMS), 27 CUMS mice were randomly divided into the depression, ketamine (i.p.10 mg/kg), and FR180204 (ERK1/2 inhibitor, i.p.100 mg/kg) + ketamine group. Three mice randomly selected from each group were injected with 18F-FDG at 6 h after treatment. The brain tissue was collected at 6 h after treatment for p-ERK1/2 and GLUTs. Treatment with ketamine significantly increased glucose uptake, extracellular lactic-acid content, expression levels of GLUT3 and p-ERK in astrocytes and glucose uptake in the prefrontal cortex (P < 0.05), and the immobility time was significantly shortened in depressive-like mice (P < 0.01). An ERK1/2 inhibitor significantly inhibited ketamine-induced increases in the glucose uptake in depressive-like mice (P < 0.05), as well as prolonged the immobility time (P < 0.01). The expression levels of p-ERK1/2 and GLUT3 in depressive-like mice were significantly lower than those in normal control mice (P < 0.01). Ketamine treatment in depressive-like mice significantly increased the expression levels of p-ERK1/2 and GLUT3 in the prefrontal cortex (P < 0.01), whereas an ERK1/2 inhibitor significantly inhibited ketamine-induced increases (P < 0.01).Our present findings demonstrate that ketamine mitigated depressive-like behaviors in female mice by activating the ERK/GLUT3 signal pathway, which further increased glucose uptake in the prefrontal cortex.
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Affiliation(s)
- Xin Ouyang
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, No. 25, Taiping Road, Luzhou, 646000, Sichuan Province, People's Republic of China
- Department of Anesthesiology, The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, Sichuan, People's Republic of China
| | - Zhengjia Wang
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, No. 25, Taiping Road, Luzhou, 646000, Sichuan Province, People's Republic of China
| | - Mei Luo
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, No. 25, Taiping Road, Luzhou, 646000, Sichuan Province, People's Republic of China
| | - Maozhou Wang
- Heart Center, Beijing Anzhen Hospital, Captial Medical University, Beijing, 100020, People's Republic of China
| | - Xing Liu
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, No. 25, Taiping Road, Luzhou, 646000, Sichuan Province, People's Republic of China
| | - Jiaxin Chen
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, No. 25, Taiping Road, Luzhou, 646000, Sichuan Province, People's Republic of China
| | - JianGuo Feng
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, No. 25, Taiping Road, Luzhou, 646000, Sichuan Province, People's Republic of China
| | - Jing Jia
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, No. 25, Taiping Road, Luzhou, 646000, Sichuan Province, People's Republic of China
| | - Xiaobin Wang
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, No. 25, Taiping Road, Luzhou, 646000, Sichuan Province, People's Republic of China.
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17
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Lu DY, Sun J, Zheng J, Zheng L, Xue WN, Li C, He B, Wang YL, Li YJ, Liu T. Shenxiong glucose injection inhibits H 2O 2-induced H9c2 cell apoptosis by activating the ERK signaling pathway. Biomed Pharmacother 2021; 143:112114. [PMID: 34474350 DOI: 10.1016/j.biopha.2021.112114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/14/2021] [Accepted: 08/19/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Shenxiong glucose injection (SGI) is a traditional Chinese medicine injection composed of water extract of Salvia miltiorrhiza and Ligustrazine hydrochloride. SGI has shown strong antioxidant and anti-apoptotic properties. However, the mechanisms underlying its anti-apoptotic effect need to be addressed. METHODS H9c2 cell apoptosis model was established by treatment of hydrogen peroxide (H2O2). Cell survival rates were examined by MTS assay, cell apoptosis rates were determined by flow cytometry, levels of intracellular ROS were assessed by ROS kit, proteome phosphorylation was determined by phosphoproteomic analysis, and extracellular signal-regulated kinase (ERK), phosphorylated ERK, phosphorylated c-Jun, B-cell lymphoma 2 (Bcl-2)-associated X protein (Bax), Bcl-2, and cleaved caspase-3 were examined by Western blot. RESULT SGI showed protective effects against H2O2-induced reduced cell viability, elevated ROS, and increased apoptosis in H9c2 cells. Phosphorylation proteomics detected a total of 3369 proteins with 78 protein of upregulated phosphorylation and 104 protein of downregulated phosphorylation. Kyoto Encyclopedia Genes and Genomes pathway analyses of differentially phosphorylated proteins showed that the ERK pathway, the downstream pathway of the focal adhesion pathway related to apoptosis, was highly enriched, and the phosphorylation levels of ERK and c-Jun were confirmed by Western blot. In addition, the ERK pathway inhibitor PD98059 significantly inhibited the anti-apoptotic effect of SGI. CONCLUSION SGI antagonizes H2O2-induced cell apoptosis by activating the ERK pathway.
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Affiliation(s)
- Ding-Yan Lu
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Jia Sun
- State Key Laboratory of Functions and Applications of Medicinal Plants & Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Jiang Zheng
- State Key Laboratory of Functions and Applications of Medicinal Plants & Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Lin Zheng
- State Key Laboratory of Functions and Applications of Medicinal Plants & Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Wei-Na Xue
- School of Medicine and Health Management, Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Chun Li
- School of Pharmacy, Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Bin He
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Yong-Lin Wang
- State Key Laboratory of Functions and Applications of Medicinal Plants & Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Yong-Jun Li
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Medical University, Guiyang 550004, Guizhou, China
| | - Ting Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants & Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, Guizhou, China.
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18
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Ruiz-Ramirez C, Antaño-Martinez AR, Robles J, Gallegos-Corona MA, Gallegos-Reyes MA, Avila EE, Martinez-Alfaro M. Correlation between urinary KIM-1 and kidney protein expression of p-ERK following damage in rats exposed to gentamicin or lead acetate. J Biochem Mol Toxicol 2021; 35:e22875. [PMID: 34350654 DOI: 10.1002/jbt.22875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 07/19/2021] [Accepted: 07/24/2021] [Indexed: 11/11/2022]
Abstract
Kidney injury molecule-1 (KIM-1) is a membrane receptor upregulated in the proximal tubule cells following various types of kidney injuries. Notably, studies have suggested a correlation between KIM-1 expression and extracellular signal-regulated kinase (ERK) activation. In this study, we aimed to investigate the association between the kidney overexpression pattern of cytoplasmic phosphorylated-ERK (p-ERK) protein and increased urinary KIM-1 levels in rats exposed to gentamicin or lead acetate, both at the end of toxic exposure and after a 4-week recovery period. Although other proteins were evaluated, only kidney overexpression of cytoplasmic p-ERK protein correlated with increased urinary KIM-1 levels. For both toxic substances, the increased urinary KIM-1 levels corresponded with kidney inflammation. Our results suggest that KIM-1 and p-ERK share a common mechanism in kidney injury mediated by both toxic substances that induce proximal tubule damage.
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Affiliation(s)
| | | | - Juvencio Robles
- Pharmacy Department, DCNE, Universidad de Guanajuato, Guanajuato, Mexico
| | | | | | - Eva E Avila
- Biology Department, DCNE, Universidad de Guanajuato, Guanajuato, Mexico
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19
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Li B, Zhou M, Wang J, Xu H, Yang M. Suppressing ERK Pathway Impairs Glycochenodeoxycholate-Mediated Survival and Drug-Resistance in Hepatocellular Carcinoma Cells. Front Oncol 2021; 11:663944. [PMID: 34327135 PMCID: PMC8313996 DOI: 10.3389/fonc.2021.663944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 06/22/2021] [Indexed: 12/02/2022] Open
Abstract
Glycochenodeoxycholate (GCDA), a toxic component in bile salts, is involved in carcinogenesis of gastrointestinal tumors. The objective of this research was to study the function of ERK1/2 in the GCDA-mediated survival and drug-resistance in hepatocellular carcinoma cells (HCCs). Firstly, extracellular signal-regulated kinase 1/2 (ERK1/2) was detected extensively expressed in liver cancer cells, and silencing ERK1/2 by RNA interference could suppress GCDA-stimulated survival and promote apoptosis. Furthermore, phosphorylation of endogenous ERK1/2 could be potently stimulated by GCDA in combination with enhanced chemoresistance in QGY-7703 hepatocellular carcinoma cells. The GCDA-mediated proliferation and chemoresistance could be impaired by PD98059, which acted as an inhibitor to block the phosphorylation of ERK1/2. Mechanistically, PD98059 was able to potently suppress GCDA-stimulated nuclear aggregation of ERK1/2 and p-ERK1/2, upregulate pro-survival protein Mcl-1 and downregulate pro-apoptotic protein Bim. The results of this study indicated that disruption of ERK1/2 by blocking phosphorylation or nuclear translocation may put forward new methods for solving the problem of GCDA-related proliferation and drug-resistance in liver cancer treatment.
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Affiliation(s)
- Bingxin Li
- Department of Hepatobiliary and Pancreatic Surgery, National Health Commission (NHC) Key Laboratory of Nanobiological Technology, Xiangya Hospital, Central South University, Changsha, China
| | - Maojun Zhou
- Department of Oncology, NHC Key Laboratory of Cancer Proteomics, National Center for Geriatrics Clinical Research, State Local Joint Engineering Laboratory for Anticancer Drugs, Xiangya Hospital, Central South University, Changsha, China
| | - Jue Wang
- Department of Hepatobiliary and Pancreatic Surgery, National Health Commission (NHC) Key Laboratory of Nanobiological Technology, Xiangya Hospital, Central South University, Changsha, China
| | - Hongjuan Xu
- Department of Hepatobiliary and Pancreatic Surgery, National Health Commission (NHC) Key Laboratory of Nanobiological Technology, Xiangya Hospital, Central South University, Changsha, China
| | - Manyi Yang
- Department of Hepatobiliary and Pancreatic Surgery, National Health Commission (NHC) Key Laboratory of Nanobiological Technology, Xiangya Hospital, Central South University, Changsha, China
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20
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Lu C, Wu B, Liao Z, Xue M, Zou Z, Feng J, Sheng J. DUSP1 overexpression attenuates renal tubular mitochondrial dysfunction by restoring Parkin-mediated mitophagy in diabetic nephropathy. Biochem Biophys Res Commun 2021; 559:141-147. [PMID: 33940385 DOI: 10.1016/j.bbrc.2021.04.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 04/08/2021] [Indexed: 11/17/2022]
Abstract
Diabetic nephropathy (DN) is the primary cause of end-stage renal disease, and renal tubular cell dysfunction contributes to the pathogenesis of many kidney diseases. Our previous study demonstrated that dual-specificity protein phosphatase 1 (DUSP1) reduced hyperglycemia-mediated mitochondrial damage; however, its role in hyperglycemia-driven dysfunction of tubular cells is still not fully understood. In this study, we found that DUSP1 is reduced in human proximal tubular epithelial (HK-2) cells under high-glucose conditions. DUSP1 overexpression in HK-2 cells partially restored autophagic flux, improved mitochondrial function, and reduced reactive oxygen species generation and cell apoptosis under high-glucose conditions. Surprisingly, overexpressing DUSP1 abolished the decrease in mitochondrial parkin expression caused by high-glucose stimulation. In addition, knockdown of parkin in HK-2 cells reversed the effects of DUSP1 overexpression on mitophagy and apoptosis under high-glucose conditions. Overall, these data indicate that DUSP1 plays a defensive role in the pathogenesis of DN by restoring parkin-mediated mitophagy, suggesting that it may be considered a prospective therapeutic strategy for the amelioration of DN.
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Affiliation(s)
- Chang Lu
- Department of Nephrology, Xuhui District Central Hospital of Shanghai, Shanghai, 200003, China
| | - Bo Wu
- Department of Cardiology, Yangpu Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhuojun Liao
- Department of Nephrology, Xuhui District Central Hospital of Shanghai, Shanghai, 200003, China
| | - Ming Xue
- Department of Nephrology, Xuhui District Central Hospital of Shanghai, Shanghai, 200003, China
| | - Zhouping Zou
- Department of Nephrology, Xuhui District Central Hospital of Shanghai, Shanghai, 200003, China
| | - Jianxun Feng
- Department of Nephrology, Xuhui District Central Hospital of Shanghai, Shanghai, 200003, China.
| | - Junqin Sheng
- Department of Nephrology, Xuhui District Central Hospital of Shanghai, Shanghai, 200003, China.
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21
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MiR-30c-5p Directly Targets MAPK1 to Regulate the Proliferation, Migration and Invasion of Adenomyotic Epithelial Cells in Adenomyosis. Twin Res Hum Genet 2021; 24:22-28. [PMID: 33775270 DOI: 10.1017/thg.2021.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The purpose of our study was to elucidate the functions of miR-30c-5p on adenomyosis for exploring novel treatment strategies. We first detected the expression of miR-30c-5p in clinical adenomyotic tissues and isolated endometrial cells from adenomyotic tissues. Next, gain and loss-of-function assays were performed to detect the effect of miR-30c-5p on adenomyotic endometrial cells. Further, luciferase assay and real-time polymerase chain reaction as well as western blot were conducted to investigate the potential target of miR-30c-5p; and transwell assay, wound-healing assay and CCK-8 assay were used to evaluate the effects of miR-30c-5p and its target on regulating biological functions of adenomyotic endometrial cells. Our results found that miR-30c-5p was down-regulated in both adenomyosis tissues and adenomyotic epithelial cells, which correlated with dysmenorrhea, longer duration of symptoms and more menstrual bleeding. Moreover, the overexpression of miR-30c-5p inhibited the proliferation, migration and invasion of adenomyotic epithelial cells, where miR-30c-5p knockdown had an opposite effect. Furthermore, we confirmed mitogen-activated protein kinase 1 (MAPK1) was one of the direct targets of miR-30c-5p, indicating its important role in miR-30c-5p-mediated suppression of proliferation, invasion and migration in adenomyotic epithelial cells. This study showed that the interaction of miR-30c-5p with MAPK1 can regulate the proliferation, invasion and migration in adenomyotic epithelial cells.
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22
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A Green and Blue Monochromatic Light Combination Therapy Reduces Oxidative Stress and Enhances B-Lymphocyte Proliferation through Promoting Melatonin Secretion. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5595376. [PMID: 33828639 PMCID: PMC8004379 DOI: 10.1155/2021/5595376] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/23/2021] [Accepted: 03/02/2021] [Indexed: 11/18/2022]
Abstract
Artificial illumination may interfere with biological rhythms and distort physiological homeostasis in avian. Our previous study demonstrated that 660 nm red light exacerbates oxidative stress, but a combination of green and blue lights (G→B) can improve the antibody titer in chickens compared with single monochromatic light. Melatonin acts as an antioxidant which is a critical signaling to the coordination between external light stimulation and the cellular response from the body. This study further clarifies the potential role of melatonin in monochromatic light combination-induced bursa B-lymphocyte proliferation in chickens. A total of 192 chicks were exposed to a single monochromatic light (red (R), green (G), blue (B), or white (W) lights) or various monochromatic light combinations (B→G, G→B, and R→B) from P0 to P42. We used qRT-PCR, MTT, western blotting, immunohistochemistry, and Elisa to explore the effect of a combination of monochromatic light on bursa B-lymphocytes and its intracellular signal pathways. With consistency in the upregulation in melatonin level of plasma and antioxidant enzyme ability, we observed increases in organ index, follicle area, lymphocyte density, B-lymphocyte proliferation, PCNA-positive cells, and cyclin D1 expression in bursa of the G→B group compared with other light-treated groups. Melatonin bound to Mel1a and Mel1c and upregulated p-AKT, p-PKC, and p-ERK expression, thereby activating PI3K/AKT and PKC/ERK signaling and inducing B-lymphocyte proliferation. Overall, these findings suggested that melatonin modulates a combination of green and blue light-induced B-lymphocyte proliferation in chickens by reducing oxidative stress and activating the Mel1a/PI3K/AKT and Mel1c/PKC/ERK pathways.
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Marti L, Savatin DV, Gigli-Bisceglia N, de Turris V, Cervone F, De Lorenzo G. The intracellular ROS accumulation in elicitor-induced immunity requires the multiple organelle-targeted Arabidopsis NPK1-related protein kinases. PLANT, CELL & ENVIRONMENT 2021; 44:931-947. [PMID: 33314180 DOI: 10.1111/pce.13978] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 11/30/2020] [Accepted: 12/03/2020] [Indexed: 05/22/2023]
Abstract
Recognition at the plasma membrane of danger signals (elicitors) belonging to the classes of the microbe/pathogen- and damage-associated molecular patterns is a key event in pathogen sensing by plants and is associated with a rapid activation of immune responses. Different cellular compartments, including plasma membrane, chloroplasts, nuclei and mitochondria, are involved in the immune cellular program. However, how pathogen sensing is transmitted throughout the cell remains largely to be uncovered. Arabidopsis NPK1-related Proteins (ANPs) are mitogen-activated protein kinase kinase kinases previously shown to have a role in immunity. In this article, we studied the in vivo intracellular dynamics of ANP1- and ANP3-GFP fusions and found that under basal physiological conditions both proteins are present in the cytosol, while ANP3 is also localized in mitochondria. After elicitor perception, both proteins are present also in the plastids and nuclei, revealing a localization pattern that is so far unique. The N-terminal region of the protein kinases is responsible for their localization in mitochondria and plastids. Moreover, we found that the localization of ANPs coincides with the sites of elicitor-induced ROS accumulation and that plants lacking ANP function do not accumulate intracellular ROS.
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Affiliation(s)
- Lucia Marti
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University, Rome, Italy
| | | | - Nora Gigli-Bisceglia
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University, Rome, Italy
| | | | - Felice Cervone
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University, Rome, Italy
| | - Giulia De Lorenzo
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University, Rome, Italy
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24
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New Insights into the Link between Melanoma and Thyroid Cancer: Role of Nucleocytoplasmic Trafficking. Cells 2021; 10:cells10020367. [PMID: 33578751 PMCID: PMC7916461 DOI: 10.3390/cells10020367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/05/2021] [Accepted: 02/06/2021] [Indexed: 12/22/2022] Open
Abstract
Cancer remains a major public health concern, mainly because of the incompletely understood dynamics of molecular mechanisms for progression and resistance to treatments. The link between melanoma and thyroid cancer (TC) has been noted in numerous patients. Nucleocytoplasmic transport of oncogenes and tumor suppressor proteins is a common mechanism in melanoma and TC that promotes tumorigenesis and tumor aggressiveness. However, this mechanism remains poorly understood. Papillary TC (PTC) patients have a 1.8-fold higher risk for developing cutaneous malignant melanoma than healthy patients. Our group and others showed that patients with melanoma have a 2.15 to 2.3-fold increased risk of being diagnosed with PTC. The BRAF V600E mutation has been reported as a biological marker for aggressiveness and a potential genetic link between malignant melanoma and TC. The main mechanistic factor in the connection between these two cancer types is the alteration of the RAS-RAF-MEK-ERK signaling pathway activation and translocation. The mechanisms of nucleocytoplasmic trafficking associated with RAS, RAF, and Wnt signaling pathways in melanoma and TC are reviewed. In addition, we discuss the roles of tumor suppressor proteins such as p53, p27, forkhead O transcription factors (FOXO), and NF-KB within the nuclear and cytoplasmic cellular compartments and their association with tumor aggressiveness. A meticulous English-language literature analysis was performed using the PubMed Central database. Search parameters included articles published up to 2021 with keyword search terms melanoma and thyroid cancer, BRAF mutation, and nucleocytoplasmic transport in cancer.
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25
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The ERK mitogen-activated protein kinase signaling network: the final frontier in RAS signal transduction. Biochem Soc Trans 2021; 49:253-267. [PMID: 33544118 DOI: 10.1042/bst20200507] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/30/2020] [Accepted: 01/08/2021] [Indexed: 12/11/2022]
Abstract
The RAF-MEK-ERK mitogen-activated protein kinase (MAPK) cascade is aberrantly activated in a diverse set of human cancers and the RASopathy group of genetic developmental disorders. This protein kinase cascade is one of the most intensely studied cellular signaling networks and has been frequently targeted by the pharmaceutical industry, with more than 30 inhibitors either approved or under clinical evaluation. The ERK-MAPK cascade was originally depicted as a serial and linear, unidirectional pathway that relays extracellular signals, such as mitogenic stimuli, through the cytoplasm to the nucleus. However, we now appreciate that this three-tiered protein kinase cascade is a central core of a complex network with dynamic signaling inputs and outputs and autoregulatory loops. Despite our considerable advances in understanding the ERK-MAPK network, the ability of cancer cells to adapt to the inhibition of key nodes reveals a level of complexity that remains to be fully understood. In this review, we summarize important developments in our understanding of the ERK-MAPK network and identify unresolved issues for ongoing and future study.
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26
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Juvale IIA, Hassan Z, Has ATC. The Emerging Roles of π Subunit-Containing GABA A Receptors in Different Cancers. Int J Med Sci 2021; 18:3851-3860. [PMID: 34790061 PMCID: PMC8579298 DOI: 10.7150/ijms.60928] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 10/10/2021] [Indexed: 01/15/2023] Open
Abstract
Cancer is one of the leading causes of death in both developed and developing countries. Due to its heterogenous nature, it occurs in various regions of the body and often goes undetected until later stages of disease progression. Feasible treatment options are limited because of the invasive nature of cancer and often result in detrimental side-effects and poor survival rates. Therefore, recent studies have attempted to identify aberrant expression levels of previously undiscovered proteins in cancer, with the hope of developing better diagnostic tools and pharmaceutical options. One class of such targets is the π-subunit-containing γ-aminobutyric acid type A receptors. Although these receptors were discovered more than 20 years ago, there is limited information available. They possess atypical functional properties and are expressed in several non-neuronal tissues. Prior studies have highlighted the role of these receptors in the female reproductive system. New research focusing on the higher expression levels of these receptors in ovarian, breast, gastric, cervical, and pancreatic cancers, their physiological function in healthy individuals, and their pro-tumorigenic effects in these cancer types is reviewed here.
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Affiliation(s)
- Iman Imtiyaz Ahmed Juvale
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Zurina Hassan
- Centre for Drug Research, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia
| | - Ahmad Tarmizi Che Has
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia
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27
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Tanner MA, Thomas TP, Maitz CA, Grisanti LA. β2-Adrenergic Receptors Increase Cardiac Fibroblast Proliferation Through the Gαs/ERK1/2-Dependent Secretion of Interleukin-6. Int J Mol Sci 2020; 21:ijms21228507. [PMID: 33198112 PMCID: PMC7697911 DOI: 10.3390/ijms21228507] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/04/2020] [Accepted: 11/10/2020] [Indexed: 12/18/2022] Open
Abstract
Fibroblasts are an important resident cell population in the heart involved in maintaining homeostasis and structure during normal conditions. They are also crucial in disease states for sensing signals and initiating the appropriate repair responses to maintain the structural integrity of the heart. This sentinel role of cardiac fibroblasts occurs, in part, through their ability to secrete cytokines. β-adrenergic receptors (βAR) are also critical regulators of cardiac function in the normal and diseased state and a major therapeutic target clinically. βAR are known to influence cytokine secretion in various cell types and they have been shown to be involved in cytokine production in the heart, but their role in regulating cytokine production in cardiac fibroblasts is not well understood. Thus, we hypothesized that βAR activation on cardiac fibroblasts modulates cytokine production to influence fibroblast function. Using primary fibroblast cultures from neonatal rats and adult mice, increased interleukin (IL)-6 expression and secretion occurred following β2AR activation. The use of pharmacological inhibitors and genetic manipulations showed that IL-6 elevations occurred through the Gαs-mediated activation of ERK1/2 and resulted in increased fibroblast proliferation. In vivo, a lack of β2AR resulted in increased infarct size following myocardial infarction and impaired wound closure in a murine dermal wound healing assay. These findings identify an important role for β2AR in regulating fibroblast proliferation through Gαs/ERK1/2-dependent alterations in IL-6 and may lead to the development of improved heart failure therapies through targeting fibrotic function of β2AR.
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Affiliation(s)
- Miles A. Tanner
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA; (M.A.T.); (T.P.T.)
| | - Toby P. Thomas
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA; (M.A.T.); (T.P.T.)
| | - Charles A. Maitz
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA;
| | - Laurel A. Grisanti
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA; (M.A.T.); (T.P.T.)
- Correspondence: ; Tel.: +573-884-8852
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28
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Mohammad Nezhady MA, Rivera JC, Chemtob S. Location Bias as Emerging Paradigm in GPCR Biology and Drug Discovery. iScience 2020; 23:101643. [PMID: 33103080 PMCID: PMC7569339 DOI: 10.1016/j.isci.2020.101643] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
GPCRs are the largest receptor family that are involved in virtually all biological processes. Pharmacologically, they are highly druggable targets, as they cover more than 40% of all drugs in the market. Our knowledge of biased signaling provided insight into pharmacology vastly improving drug design to avoid unwanted effects and achieve higher efficacy and selectivity. However, yet another feature of GPCR biology is left largely unexplored, location bias. Recent developments in this field show promising avenues for evolution of new class of pharmaceuticals with greater potential for higher level of precision medicine. Further consideration and understanding of this phenomenon with deep biochemical and molecular insights would pave the road to success. In this review, we critically analyze this perspective and discuss new avenues of investigation.
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Affiliation(s)
- Mohammad Ali Mohammad Nezhady
- Programmes en Biologie Moléculaire, Faculté de Médecine, Université de Montréal, Montreal, QC, Canada
- Centre de Recherche du CHU Sainte-Justine, Montreal, QC H3T 1C5, Canada
- Corresponding author
| | | | - Sylvain Chemtob
- Programmes en Biologie Moléculaire, Faculté de Médecine, Université de Montréal, Montreal, QC, Canada
- Centre de Recherche du CHU Sainte-Justine, Montreal, QC H3T 1C5, Canada
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, QC, Canada
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29
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Collier JB, Schnellmann RG. Extracellular signal-regulated kinase 1/2 regulates NAD metabolism during acute kidney injury through microRNA-34a-mediated NAMPT expression. Cell Mol Life Sci 2020; 77:3643-3655. [PMID: 31873757 PMCID: PMC11104937 DOI: 10.1007/s00018-019-03391-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 10/26/2019] [Accepted: 11/20/2019] [Indexed: 02/07/2023]
Abstract
Prior studies have established the important role of extracellular signal-regulated kinase 1/2 (ERK1/2) as a mediator of acute kidney injury (AKI). We demonstrated rapid ERK1/2 activation induced renal dysfunction following ischemia/reperfusion (IR)-induced AKI and downregulated the mitochondrial biogenesis (MB) regulator, peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α) in mice. In this study, ERK1/2 regulation of cellular nicotinamide adenine dinucleotide (NAD) and PGC-1α were explored. Inhibition of ERK1/2 activation during AKI in mice using the MEK1/2 inhibitor, trametinib, attenuated renal cortical oxidized NAD (NAD+) depletion. The rate-limiting NAD biosynthesis salvage enzyme, NAMPT, decreased following AKI, and this decrease was prevented by ERK1/2 inhibition. The microRNA miR34a decreased with the inhibition of ERK1/2, leading to increased NAMPT protein. Mice treated with a miR34a mimic prevented increases in NAMPT protein in the renal cortex in the presence of ERK1/2 inhibition. In addition, ERK1/2 activation increased acetylated PGC-1α, the less active form, whereas inhibition of ERK1/2 activation prevented an increase in acetylated PGC-1α after AKI through SIRT1 and NAD+ attenuation. These results implicate IR-induced ERK1/2 activation as an important contributor to the downregulation of both PGC-1α and NAD+ pathways that ultimately decrease cellular metabolism and renal function. Inhibition of ERK1/2 activation prior to the initiation of IR injury attenuated decreases in PGC-1α and NAD+ and prevented kidney dysfunction.
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Affiliation(s)
- Justin B Collier
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA.
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA.
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, USA.
| | - Rick G Schnellmann
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, USA
- Southern Arizona VA Health Care System, Tucson, AZ, USA
- Southwest Environmental Health Science Center, University of Arizona, Tucson, AZ, USA
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30
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Nuclear P38: Roles in Physiological and Pathological Processes and Regulation of Nuclear Translocation. Int J Mol Sci 2020; 21:ijms21176102. [PMID: 32847129 PMCID: PMC7504396 DOI: 10.3390/ijms21176102] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/20/2020] [Accepted: 08/21/2020] [Indexed: 02/07/2023] Open
Abstract
The p38 mitogen-activated protein kinase (p38MAPK, termed here p38) cascade is a central signaling pathway that transmits stress and other signals to various intracellular targets in the cytoplasm and nucleus. More than 150 substrates of p38α/β have been identified, and this number is likely to increase. The phosphorylation of these substrates initiates or regulates a large number of cellular processes including transcription, translation, RNA processing and cell cycle progression, as well as degradation and the nuclear translocation of various proteins. Being such a central signaling cascade, its dysregulation is associated with many pathologies, particularly inflammation and cancer. One of the hallmarks of p38α/β signaling is its stimulated nuclear translocation, which occurs shortly after extracellular stimulation. Although p38α/β do not contain nuclear localization or nuclear export signals, they rapidly and robustly translocate to the nucleus, and they are exported back to the cytoplasm within minutes to hours. Here, we describe the physiological and pathological roles of p38α/β phosphorylation, concentrating mainly on the ill-reviewed regulation of p38α/β substrate degradation and nuclear translocation. In addition, we provide information on the p38α/β ’s substrates, concentrating mainly on the nuclear targets and their role in p38α/β functions. Finally, we also provide information on the mechanisms of nuclear p38α/β translocation and its use as a therapeutic target for p38α/β-dependent diseases.
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31
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Liu C, Sun M, Wang Y, Zhu T, Ye G, You D, Dong L, Zhao W, Cheng K, Weng W, Zhang YS, Yu M, Wang H. Ultraviolet Radiant Energy-Dependent Functionalization Regulates Cellular Behavior on Titanium Dioxide Nanodots. ACS APPLIED MATERIALS & INTERFACES 2020; 12:31793-31803. [PMID: 32485098 DOI: 10.1021/acsami.0c07761] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Titanium dioxide (TiO2) photofunctionalization has been demonstrated as an effective surface modification method for the osseointegration of implants. However, the insufficient understanding of the mechanism underlying photofunctionalization limits its clinical applications. Here, we report an ultraviolet (UV) radiant energy-dependent functionalization on TiO2 nanodots (TN) surfaces. We found the cell adhesion, proliferation, and osteogenic differentiation gradually increased with the accumulation of UV radiant energy (URE). The optimal functionalizing treatment energy was found to be 2000 mJ/cm2, which could regulate cell-specific behaviors on TN surfaces. The enhanced cell behaviors were regulated by the adsorption and functional site exposure of the extracellular matrix (ECM) proteins, which were the result of the surface physicochemical changes induced by the URE. The correlation between the URE and the reconstruction of surface hydroxyl groups was considered as an alternative mechanism of this energy-dependent functionalization. We also demonstrated the synergistic effects of FAK-RHOA and ERK1/2 signaling pathways on mediating the URE-dependent cell behaviors. Overall, this study provides a novel insight into the mechanisms of photofunctionalization, guiding the design of implants and the clinical practice of photofunctionalization.
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Affiliation(s)
- Chao Liu
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
| | - Mouyuan Sun
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
| | - Yu Wang
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
| | - Tianer Zhu
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
| | - Guanchen Ye
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
| | - Dongqi You
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
| | - Lingqing Dong
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wenquan Zhao
- The First Affiliated Hospital of Medical College, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Kui Cheng
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wenjian Weng
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, United States
| | - Mengfei Yu
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
| | - Huiming Wang
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310003, China
- The First Affiliated Hospital of Medical College, Zhejiang University School of Medicine, Hangzhou 310003, China
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32
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Zhong L, Zhang H, Ding ZF, Li J, Lv JW, Pan ZJ, Xu DX, Yin ZS. Erythropoietin-Induced Autophagy Protects Against Spinal Cord Injury and Improves Neurological Function via the Extracellular-Regulated Protein Kinase Signaling Pathway. Mol Neurobiol 2020; 57:3993-4006. [PMID: 32647973 DOI: 10.1007/s12035-020-01997-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 06/22/2020] [Indexed: 12/12/2022]
Abstract
The objective of this study was to explore the neuroprotective molecular mechanisms of erythropoietin (EPO) in rats following spinal cord injury (SCI). First, a standard SCI model was established. After drug or saline treatment was administered, locomotor function was evaluated in rats using the Basso, Beattie, and Bresnahan (BBB) locomotor rating scale. H&E, Nissl, and TUNEL staining were performed to assess the ratio of cavities, number of motor neurons, and apoptotic cells in the damaged area. The relative protein and mRNA expressions were examined using western blot and qRT-PCR analyses, and the inflammatory markers, axon special protein, and neuromuscular junctions (NMJs) were detected by immunofluorescence. Both doses of EPO notably improved locomotor function, but high-dose EPO was more effective than low-dose EPO. Moreover, EPO reduced the cavity ratio, cell apoptosis, and motor neuron loss in the damaged area, but enhanced the autophagy level and extracellular-regulated protein kinase (ERK) activity. Treatment with an ERK inhibitor significantly prevented the effect of EPO on SCI, and an activator mimicked the benefits of EPO. Further investigation revealed that EPO promoted SCI-induced autophagy via the ERK signaling pathway. EPO activates autophagy to promote locomotor function recovery in rats with SCI via the ERK signaling pathway.
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Affiliation(s)
- Lin Zhong
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, China.,Department of Orthopedics, The Third Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Hui Zhang
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, China
| | - Zheng-Fei Ding
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, China
| | - Jian Li
- Department of Toxicology, School of Public Health, Anhui Medical University, #81 Mei Shan Road, Hefei, 230032, China.,Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China
| | - Jin-Wei Lv
- Department of Toxicology, School of Public Health, Anhui Medical University, #81 Mei Shan Road, Hefei, 230032, China.,Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China
| | - Zheng-Jun Pan
- Department of Orthopedics, The Third Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - De-Xiang Xu
- Department of Toxicology, School of Public Health, Anhui Medical University, #81 Mei Shan Road, Hefei, 230032, China. .,Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Hefei, China.
| | - Zong-Sheng Yin
- Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, #218 Jixi Road, Hefei, 230022, China.
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33
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Molecular Regulation in Dopaminergic Neuron Development. Cues to Unveil Molecular Pathogenesis and Pharmacological Targets of Neurodegeneration. Int J Mol Sci 2020; 21:ijms21113995. [PMID: 32503161 PMCID: PMC7312927 DOI: 10.3390/ijms21113995] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/30/2020] [Accepted: 06/01/2020] [Indexed: 12/13/2022] Open
Abstract
The relatively few dopaminergic neurons in the mammalian brain are mostly located in the midbrain and regulate many important neural functions, including motor integration, cognition, emotive behaviors and reward. Therefore, alteration of their function or degeneration leads to severe neurological and neuropsychiatric diseases. Unraveling the mechanisms of midbrain dopaminergic (mDA) phenotype induction and maturation and elucidating the role of the gene network involved in the development and maintenance of these neurons is of pivotal importance to rescue or substitute these cells in order to restore dopaminergic functions. Recently, in addition to morphogens and transcription factors, microRNAs have been identified as critical players to confer mDA identity. The elucidation of the gene network involved in mDA neuron development and function will be crucial to identify early changes of mDA neurons that occur in pre-symptomatic pathological conditions, such as Parkinson’s disease. In addition, it can help to identify targets for new therapies and for cell reprogramming into mDA neurons. In this essay, we review the cascade of transcriptional and posttranscriptional regulation that confers mDA identity and regulates their functions. Additionally, we highlight certain mechanisms that offer important clues to unveil molecular pathogenesis of mDA neuron dysfunction and potential pharmacological targets for the treatment of mDA neuron dysfunction.
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Lu Y, Liu B, Liu Y, Yu X, Cheng G. Dual effects of active ERK in cancer: A potential target for enhancing radiosensitivity. Oncol Lett 2020; 20:993-1000. [PMID: 32724338 PMCID: PMC7377092 DOI: 10.3892/ol.2020.11684] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 04/20/2020] [Indexed: 12/20/2022] Open
Abstract
Ionizing radiation (IR) is an important cancer treatment approach. However, radioresistance eventually occurs, resulting in poor outcomes in patients with cancer. Radioresistance is associated with multiple signaling pathways, particularly pro-survival signaling pathways. The extracellular signal-regulated kinase 1/2 (ERK1/2) cascade is an important signaling pathway that initiates several cellular processes and is regulated by various stimuli, including IR. Although numerous studies have demonstrated the pro-survival effects of active ERK, activation of ERK has also been associated with cell death, indicating that radiosensitization may occur by ERK stimulation. In this context, the present review describes the associations between ERK signaling, cancer and IR, and discusses the association between ERK and its pro-survival function in cancer cells, including stimuli, molecular mechanisms, clinical use of inhibitors and underlying limitations. Additionally, the present review introduces the view that active ERK may induce cell death, and describes the potential factors associated with this process. This review describes the various outcomes induced by active ERK to prompt future studies to aim to enhance radiosensitivity in the treatment of cancer.
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Affiliation(s)
- Yinliang Lu
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Baocai Liu
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Ying Liu
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Xinyue Yu
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Guanghui Cheng
- Department of Radiation Oncology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
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Keyes J, Ganesan A, Molinar-Inglis O, Hamidzadeh A, Zhang J, Ling M, Trejo J, Levchenko A, Zhang J. Signaling diversity enabled by Rap1-regulated plasma membrane ERK with distinct temporal dynamics. eLife 2020; 9:57410. [PMID: 32452765 PMCID: PMC7289600 DOI: 10.7554/elife.57410] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/22/2020] [Indexed: 12/23/2022] Open
Abstract
A variety of different signals induce specific responses through a common, extracellular-signal regulated kinase (ERK)-dependent cascade. It has been suggested that signaling specificity can be achieved through precise temporal regulation of ERK activity. Given the wide distrubtion of ERK susbtrates across different subcellular compartments, it is important to understand how ERK activity is temporally regulated at specific subcellular locations. To address this question, we have expanded the toolbox of Förster Resonance Energy Transfer (FRET)-based ERK biosensors by creating a series of improved biosensors targeted to various subcellular regions via sequence specific motifs to measure spatiotemporal changes in ERK activity. Using these sensors, we showed that EGF induces sustained ERK activity near the plasma membrane in sharp contrast to the transient activity observed in the cytoplasm and nucleus. Furthermore, EGF-induced plasma membrane ERK activity involves Rap1, a noncanonical activator, and controls cell morphology and EGF-induced membrane protrusion dynamics. Our work strongly supports that spatial and temporal regulation of ERK activity is integrated to control signaling specificity from a single extracellular signal to multiple cellular processes.
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Affiliation(s)
- Jeremiah Keyes
- Department of Pharmacology, University of California San Diego, La Jolla, United States
| | - Ambhighainath Ganesan
- Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, United States
| | - Olivia Molinar-Inglis
- Department of Pharmacology, University of California San Diego, La Jolla, United States
| | - Archer Hamidzadeh
- Department of Biomedical Engineering and Yale Systems Biology Institute, Yale University, New Haven, United States
| | - Jinfan Zhang
- Department of Pharmacology, University of California San Diego, La Jolla, United States
| | - Megan Ling
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, United States
| | - JoAnn Trejo
- Department of Pharmacology, University of California San Diego, La Jolla, United States
| | - Andre Levchenko
- Department of Biomedical Engineering and Yale Systems Biology Institute, Yale University, New Haven, United States
| | - Jin Zhang
- Department of Pharmacology, University of California San Diego, La Jolla, United States.,Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, United States.,Department of Bioengineering, University of California San Diego, La Jolla, United States
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Chen M, Cecon E, Karamitri A, Gao W, Gerbier R, Ahmad R, Jockers R. Melatonin MT 1 and MT 2 receptor ERK signaling is differentially dependent on G i/o and G q/11 proteins. J Pineal Res 2020; 68:e12641. [PMID: 32080899 DOI: 10.1111/jpi.12641] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/15/2020] [Accepted: 02/17/2020] [Indexed: 12/14/2022]
Abstract
G protein-coupled receptors (GPCRs) transmit extracellular signals into cells by activating G protein- and β-arrestin-dependent pathways. Extracellular signal-regulated kinases (ERKs) play a central role in integrating these different linear inputs coming from a variety of GPCRs to regulate cellular functions. Here, we investigated human melatonin MT1 and MT2 receptors signaling through the ERK1/2 cascade by employing different biochemical techniques together with pharmacological inhibitors and siRNA molecules. We show that ERK1/2 activation by both receptors is exclusively G protein-dependent, without any participation of β-arrestin1/2 in HEK293 cells. ERK1/2 activation by MT1 is only mediated though Gi/o proteins, while MT2 is dependent on the cooperative activation of Gi/o and Gq/11 proteins. In the absence of Gq/11 proteins, however, MT2 -induced ERK1/2 activation switches to a β-arrestin1/2-dependent mode. The signaling cascade downstream of G proteins is the same for both receptors and involves activation of the PI3K/PKCζ/c-Raf/MEK/ERK cascade. The differential G protein dependency of MT1 - and MT2 -mediated ERK activation was confirmed at the level of EGR1 and FOS gene expression, two ERK1/2 target genes. Gi/o /Gq/11 cooperativity was also observed in Neuroscreen-1 cells expressing endogenous MT2 , whereas in the mouse retina, where MT2 is engaged into MT1 /MT2 heterodimers, ERK1/2 signaling is exclusively Gi/o -dependent. Collectively, our data reveal differential signaling modes of MT1 and MT2 in terms of ERK1/2 activation, with an unexpected Gi/o /Gq/11 cooperativity exclusively for MT2 . The plasticity of ERK activation by MT2 is highlighted by the switch to a β-arrestin1/2-dependent mode in the absence of Gq/11 proteins and by the switch to a Gi/o mode when engaged into MT1 /MT2 heterodimers, revealing a new mechanism underlying tissue-specific responses to melatonin.
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Affiliation(s)
- Min Chen
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Erika Cecon
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | | | - Wenwen Gao
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Romain Gerbier
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Raise Ahmad
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Ralf Jockers
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
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Gallyas Jr. F, Sumegi B. Mitochondrial Protection by PARP Inhibition. Int J Mol Sci 2020; 21:ijms21082767. [PMID: 32316192 PMCID: PMC7215481 DOI: 10.3390/ijms21082767] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/11/2020] [Accepted: 04/14/2020] [Indexed: 02/07/2023] Open
Abstract
Inhibitors of the nuclear DNA damage sensor and signalling enzyme poly(ADP-ribose) polymerase (PARP) have recently been introduced in the therapy of cancers deficient in double-strand DNA break repair systems, and ongoing clinical trials aim to extend their use from other forms of cancer non-responsive to conventional treatments. Additionally, PARP inhibitors were suggested to be repurposed for oxidative stress-associated non-oncological diseases resulting in a devastating outcome, or requiring acute treatment. Their well-documented mitochondria- and cytoprotective effects form the basis of PARP inhibitors’ therapeutic use for non-oncological diseases, yet can limit their efficacy in the treatment of cancers. A better understanding of the processes involved in their protective effects may improve the PARP inhibitors’ therapeutic potential in the non-oncological indications. To this end, we endeavoured to summarise the basic features regarding mitochondrial structure and function, review the major PARP activation-induced cellular processes leading to mitochondrial damage, and discuss the role of PARP inhibition-mediated mitochondrial protection in several oxidative stress-associated diseases.
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Affiliation(s)
- Ferenc Gallyas Jr.
- Department of Biochemistry and Medical Chemistry, University of Pecs Medical School, 7624 Pecs, Hungary;
- Szentagothai Research Centre, University of Pecs, 7624 Pecs, Hungary
- HAS-UP Nuclear-Mitochondrial Interactions Research Group, 1245 Budapest, Hungary
- Correspondence: ; Tel.: +36-72-536-278
| | - Balazs Sumegi
- Department of Biochemistry and Medical Chemistry, University of Pecs Medical School, 7624 Pecs, Hungary;
- Szentagothai Research Centre, University of Pecs, 7624 Pecs, Hungary
- HAS-UP Nuclear-Mitochondrial Interactions Research Group, 1245 Budapest, Hungary
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Guo YJ, Pan WW, Liu SB, Shen ZF, Xu Y, Hu LL. ERK/MAPK signalling pathway and tumorigenesis. Exp Ther Med 2020; 19:1997-2007. [PMID: 32104259 PMCID: PMC7027163 DOI: 10.3892/etm.2020.8454] [Citation(s) in RCA: 607] [Impact Index Per Article: 151.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 12/04/2019] [Indexed: 12/12/2022] Open
Abstract
Mitogen-activated protein kinase (MAPK) cascades are key signalling pathways that regulate a wide variety of cellular processes, including proliferation, differentiation, apoptosis and stress responses. The MAPK pathway includes three main kinases, MAPK kinase kinase, MAPK kinase and MAPK, which activate and phosphorylate downstream proteins. The extracellular signal-regulated kinases ERK1 and ERK2 are evolutionarily conserved, ubiquitous serine-threonine kinases that regulate cellular signalling under both normal and pathological conditions. ERK expression is critical for development and their hyperactivation plays a major role in cancer development and progression. The Ras/Raf/MAPK (MEK)/ERK pathway is the most important signalling cascade among all MAPK signal transduction pathways, and plays a crucial role in the survival and development of tumour cells. The present review discusses recent studies on Ras and ERK pathway members. With respect to processes downstream of ERK activation, the role of ERK in tumour proliferation, invasion and metastasis is highlighted, and the role of the ERK/MAPK signalling pathway in tumour extracellular matrix degradation and tumour angiogenesis is emphasised.
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Affiliation(s)
- Yan-Jun Guo
- Department of Human Anatomy and Embryology, College of Medicine, Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Wei-Wei Pan
- Department of Human Anatomy and Embryology, College of Medicine, Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Sheng-Bing Liu
- Department of Human Anatomy and Embryology, College of Medicine, Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Zhong-Fei Shen
- Department of Human Anatomy and Embryology, College of Medicine, Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Ying Xu
- Department of Human Anatomy and Embryology, College of Medicine, Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
| | - Ling-Ling Hu
- Department of Human Anatomy and Embryology, College of Medicine, Jiaxing University, Jiaxing, Zhejiang 314000, P.R. China
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Clemente L, Boeldt DS, Grummer MA, Morita M, Morgan TK, Wiepz GJ, Bertics PJ, Bird IM. Adenoviral transduction of EGFR into pregnancy-adapted uterine artery endothelial cells remaps growth factor induction of endothelial dysfunction. Mol Cell Endocrinol 2020; 499:110590. [PMID: 31550517 PMCID: PMC6886699 DOI: 10.1016/j.mce.2019.110590] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 09/19/2019] [Accepted: 09/19/2019] [Indexed: 12/13/2022]
Abstract
During pregnancy, uterine vascular vasodilation is enhanced through adapted Ca2+ signaling, facilitated through increased endothelial connexin 43 (Cx43) gap junctional communication (GJC). In preeclampsia (PE), this adaptive response is missing. Of note, the angiogenic factor VEGF can also act via Src and ERK to close Cx43 gap junctions. While VEGFR2 is necessary for such closure, a role VEGFR1 is less clear. We reasoned if VEGFR2 is acting alone, then substituting another growth factor receptor with VEGFR2-like signaling should have the same effect. In uterine artery endothelial cells derived from pregnant sheep (P-UAEC), endogenous EGFR expression is very low. When we used adenovirus to raise EGFR, we also dose-dependently induced EGF-sensitive Cx43 phosphorylation mainly via ERK, and corresponding loss of Ca2+ bursts, but eliminated VEGF effects on phosphorylation of Cx43 or loss of Ca2+ bursting. This surprising observation suggests that while activated EGFR may indeed substitute for VEGFR2, it also sequesters a limited pool of effector molecules needed for VEGFR2 to phosphorylate Cx43. Thus, low endogenous EGFR expression in P-UAEC may be a necessary strategy to allow VEGFR-2 control of GJC, a first step in initiating angiogenesis in healthy pregnancy. Of further note, trophoblasts are rich in EGFR, and we have demonstrated shed PLAP+/EGFR + extracellular vesicles in maternal circulation in first trimester plasma samples using nanoscale high resolution flow cytometry. Collectively our data suggest that placenta derived exosomes positive for EGFR should be further considered as a possible cause of endothelial dysfunction in women with PE.
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Affiliation(s)
- Luca Clemente
- Perinatal Research Laboratories, Department of Obstetrics and Gynecology, University of Wisconsin - Madison, School of Medicine and Public Health, Madison, WI, 53715, USA
| | - Derek S Boeldt
- Perinatal Research Laboratories, Department of Obstetrics and Gynecology, University of Wisconsin - Madison, School of Medicine and Public Health, Madison, WI, 53715, USA
| | - Mary A Grummer
- Perinatal Research Laboratories, Department of Obstetrics and Gynecology, University of Wisconsin - Madison, School of Medicine and Public Health, Madison, WI, 53715, USA
| | - Mayu Morita
- Departments of Pathology, Obstetrics & Gynecology, and Biomedical Engineering, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Terry K Morgan
- Departments of Pathology, Obstetrics & Gynecology, and Biomedical Engineering, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Greg J Wiepz
- Department of Comparative Biosciences, University of Wisconsin - Madison, School of Veterinary Medicine, Madison, WI, 53715, USA
| | - Paul J Bertics
- Department of Biomolecular Chemistry, University of Wisconsin - Madison, School of Medicine and Public Health, Madison, WI, 53715, USA
| | - Ian M Bird
- Perinatal Research Laboratories, Department of Obstetrics and Gynecology, University of Wisconsin - Madison, School of Medicine and Public Health, Madison, WI, 53715, USA; Department of Pediatrics, University of Wisconsin - Madison, School Medicine and Public Health, Madison, WI, 53715, USA.
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Zhang Y, Ma Y, Liang N, Liang Y, Lu C, Xiao F. Blockage of ROS-ERK-DLP1 signaling and mitochondrial fission alleviates Cr(VI)-induced mitochondrial dysfunction in L02 hepatocytes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 186:109749. [PMID: 31622878 DOI: 10.1016/j.ecoenv.2019.109749] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/23/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
Hexavalent chromium [Cr(VI)] is a common heavy metal pollutant widely used in various industrial fields. It is well known that mitochondria are the most vulnerable targets of heavy metals, but the key molecule/event that directly mediated mitochondrial dysfunction after Cr(VI) exposure is still unclear. The present study was aimed to explore whether Cr(VI) exposure could affect the mitochondrial fission/fusion process, and whether the related abnormal mitochondrial dynamics have been implicated in Cr(VI)-induced mitochondrial dysfunction. We found that the mitochondrial dysfunction caused by Cr(VI) exposure was characterized by decreased mitochondrial respiratory chain complex (MRCC) I/II activities and levels, collapsed mitochondrial membrane potential (MMP), depleted ATP, and increased reactive oxygen species (ROS) level. Cr(VI) induced abnormal mitochondrial fission/fusion events, the antioxidant Nacetyl-L-cysteine (NAC) restored the abnormal mitochondrial function as well as the fission/fusion dynamics. ROS was the up-stream regulator of extracellular regulated protein kinases (ERK) signaling, and the application of a specific ERK1/2 inhibitor PD98059 confirmed that activation of ERK1/2 signaling was associated with the abnormal mitochondrial fission/fusion and mitochondrial dysfunction. We also demonstrated that treatment with dynamic-like protein 1 (DLP1)-siRNA rescued mitochondrial dysfunction in Cr(VI)-exposed L02 hepatocytes. We reached the conclusion that blockage of ROS-ERK-DLP1 signaling and mitochondrial fission alleviates Cr(VI)-induced mitochondrial dysfunction in L02 hepatocytes, which may provide the new avenue for developing effective strategies to protect against Cr(VI)-induced hepatotoxicity.
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Affiliation(s)
- Yujing Zhang
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Yu Ma
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Ningjuan Liang
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Yuehui Liang
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Chan Lu
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Fang Xiao
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China.
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Fu XH, Chen CZ, Li S, Han DX, Wang YJ, Yuan B, Gao Y, Zhang JB, Jiang H. Dual-specificity phosphatase 1 regulates cell cycle progression and apoptosis in cumulus cells by affecting mitochondrial function, oxidative stress, and autophagy. Am J Physiol Cell Physiol 2019; 317:C1183-C1193. [DOI: 10.1152/ajpcell.00012.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Dual-specificity phosphatase 1 ( DUSP1) is differentially expressed in cumulus cells of different physiological states, but its specific function and mechanism of action remain unclear. In this study, we explored the effects of DUSP1 expression inhibition on cell cycle progression, proliferation, apoptosis, and lactate and cholesterol levels in cumulus cells and examined reactive oxygen species levels, mitochondrial function, autophagy, and the expression of key cytokine genes. The results showed that inhibition of DUSP1 in cumulus cells caused abnormal cell cycle progression, increased cell proliferation, decreased apoptosis rates, increased cholesterol synthesis and lactic acid content, and increased cell expansion. The main reason for these effects was that inhibition of DUSP1 reduced ROS accumulation, increased glutathione level and mitochondrial membrane potential, and reduced autophagy levels in cells. These results indicate that DUSP1 limits the biological function of bovine cumulus cells under normal physiological conditions and will greatly contribute to further explorations of the physiological functions of cumulus cells and the interactions of the cumulus-oocyte complex.
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Affiliation(s)
- Xu-huang Fu
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Cheng-zhen Chen
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Sheng Li
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Dong-xu Han
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Yi-jie Wang
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Bao Yuan
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Yan Gao
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Jia-bao Zhang
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
| | - Hao Jiang
- College of Animal Sciences, Jilin University, Changchun, Jilin, China
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Electronegative LDL from Rabbits Fed with Atherogenic Diet Is Highly Proinflammatory. Mediators Inflamm 2019; 2019:6163130. [PMID: 31534437 PMCID: PMC6724430 DOI: 10.1155/2019/6163130] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 06/23/2019] [Accepted: 07/03/2019] [Indexed: 12/11/2022] Open
Abstract
Electronegative low-density lipoprotein (LDL(-)) has been found in the plasma of familial hypercholesterolemia and acute myocardial infarction and has been implicated in atherosclerosis and cardiovascular disease. However, less is known about the involvement of LDL(-) in atherosclerosis-related inflammation. This study aims at investigating the inducibility of LDL(-) by atherogenic diet in rabbits and at exploring the proinflammatory potential of the diet-induced LDL(-) in macrophages. Rabbits were fed with an atherogenic diet; LDL was isolated from plasma by NaBr density gradient ultracentrifugation and was then resolved into nLDL and LDL(-) by anion-exchange chromatography. Isolated nLDL and LDL(-) were directly used or incubated with 10 μM CuSO4 for 24 h to produce copper- (Cu-) ox-nLDL and Cu-ox-LDL(-). The effects of these LDLs on inflammation were evaluated in THP-1-derived macrophages. Macrophages were treated with nLDL, LDL(-), and extensively oxidized LDL (ox-LDL), then the levels of interleukin- (IL-) 1β, IL-6, and tumor necrosis factor- (TNF-) α in a culture medium were determined by ELISA, and the levels of total and phosphorylated IκB, p65, p38, JNK, and ERK in cell lysates were determined by Western blotting. The LDL(-) induced significantly higher levels of IL-1β, IL-6, and TNF-α in the medium. The levels of phosphorylated/total IκB, p65, p38, JNK, and ERK were also upregulated by LDL(-). In contrast, nLDL, Cu-ox-nLDL, and Cu-ox-LDL(-) exhibited much less effect. Knockdown of lectin-type oxidized LDL receptor- (LOX-) 1 resulted in significant reduction in LDL(-)-induced IL-1β, IL-6, and TNF-α. In addition, these LDL(-) effects were also markedly attenuated by inhibition of NF-κB and ERK1/2. The data suggested that LDL(-) induced inflammation through LOX-1-, NF-κB-, and ERK1/2-dependent pathways. Taken together, our results show that rabbits fed with atherogenic diet produce a highly proinflammatory LDL(-) that is more potent in inducing inflammation than nLDL and extensively oxidize LDL in macrophages. The results thus provide a novel link between diet-induced hypercholesterolemia and inflammation.
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DNA fragmentation index, pAKT and pERK1/2 in cumulus cells are related to oocyte competence in patients undergoing in vitro fertilization programme. ZYGOTE 2019; 27:350-354. [PMID: 31411131 DOI: 10.1017/s0967199419000248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Activated pERK1/2 and pAKT are key players in supporting cell survival and proliferation pathways. Translocation of pERK1/2 into the nucleus, where it interacts with transcription factors and DNA itself, is instrumental in exerting an anti-apoptotic effect. In this study, pAKT levels, pERK1/2 nuclear localization and DNA fragmentation index (DFI) in cumulus cells of single cumulus-oocyte complexes of patients undergoing in vitro fertilization programmes were evaluated and correlated with the clinical outcome of the related embryos. For a positive clinical outcome of blastocyst development, pERK1/2 nuclear localization and DFI value had a significant inverse relationship, whereas the former and the intracellular accumulation of pAKT had a significant direct relationship. This relationship was not observed for the negative clinical outcome of the arrested embryos. Moreover, intracellular accumulation of pAKT and DFI value had a significant inverse relationship in all samples examined. The obtained data suggest that the intranuclear relocation of pERK1/2, along with an enhanced intracellular accumulation of pAKT, may exert a survival effect and increase cell viability, therefore providing a novel marker tool to choose the best oocyte to be fertilized and submitted to an intracytoplasmic sperm injection cycle.
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Lu N, Malemud CJ. Extracellular Signal-Regulated Kinase: A Regulator of Cell Growth, Inflammation, Chondrocyte and Bone Cell Receptor-Mediated Gene Expression. Int J Mol Sci 2019; 20:ijms20153792. [PMID: 31382554 PMCID: PMC6696446 DOI: 10.3390/ijms20153792] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/15/2019] [Accepted: 07/23/2019] [Indexed: 12/17/2022] Open
Abstract
Extracellular signal-regulated kinase (ERK) is a member of the mitogen-activated protein kinase family of signaling molecules. ERK is predominantly found in two forms, ERK1 (p44) and ERK2 (p42), respectively. There are also several atypical forms of ERK, including ERK3, ERK4, ERK5 and ERK7. The ERK1/2 signaling pathway has been implicated in many and diverse cellular events, including proliferation, growth, differentiation, cell migration, cell survival, metabolism and transcription. ERK1/2 is activated (i.e., phosphorylated) in the cytosol and subsequently translocated to the nucleus, where it activates transcription factors including, but not limited to, ETS, c-Jun, and Fos. It is not surprising that the ERK1/2 signaling cascade has been implicated in many pathological conditions, namely, cancer, arthritis, chronic inflammation, and osteoporosis. This narrative review examines many of the cellular events in which the ERK1/2 signaling cascade plays a critical role. It is anticipated that agents designed to inhibit ERK1/2 activation or p-ERK1/2 activity will be developed for the treatment of those diseases characterized by dysregulated gene expression through ERK1/2 activation.
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Affiliation(s)
- Nathan Lu
- Department of Medicine, Division of Rheumatic Diseases, Case Western Reserve University School of Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
| | - Charles J Malemud
- Department of Medicine, Division of Rheumatic Diseases, Case Western Reserve University School of Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA.
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Zhang J, Hu W, Ding C, Yao G, Zhao H, Wu S. Deferoxamine inhibits iron-uptake stimulated osteoclast differentiation by suppressing electron transport chain and MAPKs signaling. Toxicol Lett 2019; 313:50-59. [PMID: 31238089 DOI: 10.1016/j.toxlet.2019.06.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 06/18/2019] [Accepted: 06/21/2019] [Indexed: 12/12/2022]
Abstract
Iron overload causes osteoporosis by enhancing osteoclastic bone resorption. During differentiation, osteoclasts demand high energy and contain abundant mitochondria. In mitochondria, iron is used for the synthesis of Fe-S clusters to support mitochondria biogenesis and electron transport chain. Moreover, mitochondrial reactive oxygen species (ROS) play an important role in osteoclastogenesis. Activation of MAPKs (ERK1/2, JNK, and p38) by ROS is essential and contribute to osteoclast differentiation. How iron chelation impairs electron transport chain and ROS dependent MAPKs activation during osteoclast differentiation is unknown. This study aimed to determine the direct effects of iron chelation on osteoclast differentiation, electron transport chain and MAPKs activation. In the present study, we found that when iron chelator, deferoxamine (DFO), was added, a dose-dependent inhibition of osteoclast differentiation and bone resorption was observed. Supplementation of transferrin-bound iron recovered osteoclastogenesis. Iron chelation resulted in a marked decrease in ferritin level, and increased expression of transferrin receptor 1 and ferroportin. As an iron chelator, DFO negatively affected mitochondrial function through decreasing activities of all the complexes. Expressions of mitochondrial subunits encoded both by mitochondrial and nuclear DNA were decreased. DFO augmented production of mitochondrial ROS, but inhibited the phosphorylation of ERK1/2, JNK, and p38, even in the presence of hydrogen peroxide. These results suggest that iron chelation directly inhibits iron-uptake stimulated osteoclast differentiation and suppresses electron transport chain. Iron chelation negatively regulates MAPKs activation, and this negative regulation is independent on ROS stimulation.
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Affiliation(s)
- Jian Zhang
- Institute of Laboratory Animal Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China.
| | - Wentao Hu
- School of Radiation Medicine and Protection, Soochow University, Suzhou, China
| | - Chong Ding
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Department of Biomedical Engineering, School of Electrical Engineering, Hebei University of Technology, Tianjin, China
| | - Gang Yao
- Institute of Laboratory Animal Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Hai Zhao
- Institute of Laboratory Animal Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Shuguang Wu
- Institute of Laboratory Animal Sciences, Guizhou University of Traditional Chinese Medicine, Guiyang, China
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Dittmer J, Stütz A, Vanas V, Salhi J, Reisecker JM, Kral RM, Sutterlüty-Fall H. Spatial signal repression as an additional role of Sprouty2 protein variants. Cell Signal 2019; 62:109332. [PMID: 31154002 DOI: 10.1016/j.cellsig.2019.05.017] [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: 03/18/2019] [Revised: 05/29/2019] [Accepted: 05/29/2019] [Indexed: 11/19/2022]
Abstract
Sprouty2 (Spry2) is a prominent member of a protein family with crucial functions in the modulation of signal transduction. One of its main actions is the repression of mitogen-activated protein kinase (MAPK) pathway in response to growth factor-induced signalling. A common single nucleotide polymorphism within the Spry2 gene creates two protein variants where a proline adjacent to the serine rich domain is converted to an additional serine. Both protein variants perform similar functions although their efficiency in fulfilling these tasks varies. In this report, we used biochemical fractionation methods as well as confocal microscopy to analyse quantitative and qualitative differences in the distribution of Spry2 variants. We found that Spry2 proteins localize not solely to the plasma membrane, but also to other membrane engulfed compartments like for example the Golgi apparatus. In these less dense organelles, predominantly slower migrating forms reside indicating that posttranslational modification contributes to the distribution profile of Spry2. However there is no significant difference in the distribution of the two variants. Additionally, we found that Spry2 could be found exclusively in membrane fractions irrespective of the mitogen availability and the phosphorylation status. Considering the interference of extracellular signal-regulated kinase (ERK) activation in the cytoplasm, both Spry2 variants inhibited the levels of phosphorylated ERK (pERK) significantly to a similar extent. In contrast, the induction profiles of pERK levels were completely different in the nuclei. Again, both Spry2 variants diminished the levels of pERK. While the proline variant lowered the activation throughout the observation period, the serine variant failed to interfere with immediate accumulation of nuclear pERK levels, but the signal duration was shortened. Since the extent of the pERK inhibition in the nuclei was drastically more pronounced than in the cytoplasm, we conclude that Spry2 - in addition to its known functions as a repressor of general ERK phosphorylation - functions as a spatial repressor of nucleic ERK activation. Accordingly, a dominant negative version of Spry2 was only able to enhance the pERK levels of serum-deprived cells in the cytosol, while in the nucleus the intensity of the pERK signal in response to serum addition was significantly increased.
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Affiliation(s)
- Jakob Dittmer
- Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Astrid Stütz
- Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Vanita Vanas
- Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Jihen Salhi
- Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria.
| | - Johannes Manfred Reisecker
- Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria.
| | - Rosana Maria Kral
- Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria.
| | - Hedwig Sutterlüty-Fall
- Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria.
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TRAF3IP3 at the trans-Golgi network regulates NKT2 maturation via the MEK/ERK signaling pathway. Cell Mol Immunol 2019; 17:395-406. [PMID: 31076725 DOI: 10.1038/s41423-019-0234-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 04/08/2019] [Indexed: 12/28/2022] Open
Abstract
Thymic natural killer T (NKT)2 cells are a subset of invariant NKT cells with PLZFhiGATA3hiIL-4+. The differentiation of NKT2 cells is not fully understood. In the present study, we report an important role of TRAF3-interacting protein 3 (TRAF3IP3) in the functional maturation and expansion of committed NKT2s in thymic medulla. Mice with T-cell-specific deletion of TRAF3IP3 had decreased thymic NKT2 cells, decreased IL-4-producing peripheral iNKTs, and defects in response to α-galactosylceramide. Positive selection and high PLZF expression in CD24+CD44- and CCR7+CD44- immature iNKTs were not affected. Only CD44hiNK1.1- iNKTs in Traf3ip3-/- mice showed reduced expression of Egr2, PLZF, and IL-17RB, decreased proliferation, and reduced IL-4 production upon stimulation. This Egr2 and IL-4 expression was augmented by MEK1/ERK activation in iNKTs, and TRAF3IP3 at the trans-Golgi network recruited MEK1 and facilitated ERK phosphorylation and nuclear translocation. LTβR-regulated bone marrow-derived nonlymphoid cells in the medullary thymic microenvironment were required for MEK/ERK activation and NKT2 maturation. These data demonstrate an important functional maturation process in NKT2 differentiation that is regulated by MEK/ERK signaling at the trans-Golgi network.
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Maik-Rachline G, Hacohen-Lev-Ran A, Seger R. Nuclear ERK: Mechanism of Translocation, Substrates, and Role in Cancer. Int J Mol Sci 2019; 20:ijms20051194. [PMID: 30857244 PMCID: PMC6429060 DOI: 10.3390/ijms20051194] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/03/2019] [Accepted: 03/04/2019] [Indexed: 12/15/2022] Open
Abstract
The extracellular signal-regulated kinases 1/2 (ERK) are central signaling components that regulate stimulated cellular processes such as proliferation and differentiation. When dysregulated, these kinases participate in the induction and maintenance of various pathologies, primarily cancer. While ERK is localized in the cytoplasm of resting cells, many of its substrates are nuclear, and indeed, extracellular stimulation induces a rapid and robust nuclear translocation of ERK. Similarly to other signaling components that shuttle to the nucleus upon stimulation, ERK does not use the canonical importinα/β mechanism of nuclear translocation. Rather, it has its own unique nuclear translocation signal (NTS) that interacts with importin7 to allow stimulated shuttling via the nuclear pores. Prevention of the nuclear translocation inhibits proliferation of B-Raf- and N/K-Ras-transformed cancers. This effect is distinct from the one achieved by catalytic Raf and MEK inhibitors used clinically, as cells treated with the translocation inhibitors develop resistance much more slowly. In this review, we describe the mechanism of ERK translocation, present all its nuclear substrates, discuss its role in cancer and compare its translocation to the translocation of other signaling components. We also present proof of principle data for the use of nuclear ERK translocation as an anti-cancer target. It is likely that the prevention of nuclear ERK translocation will eventually serve as a way to combat Ras and Raf transformed cancers with less side-effects than the currently used drugs.
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Affiliation(s)
- Galia Maik-Rachline
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel.
| | - Avital Hacohen-Lev-Ran
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel.
| | - Rony Seger
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel.
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Wei X, Zhao T, Ai K, Zhang Y, Li H, Yang J. c-Raf participates in adaptive immune response of Nile tilapia via regulating lymphocyte activation. FISH & SHELLFISH IMMUNOLOGY 2019; 86:507-515. [PMID: 30513386 DOI: 10.1016/j.fsi.2018.11.072] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/28/2018] [Accepted: 11/30/2018] [Indexed: 06/09/2023]
Abstract
RAF proto-oncogene serine/threonine-protein kinase (c-Raf) is a MAP kinase kinase kinase (MAPKKK) that participates in the Erk1/2 pathway and plays an important role in lymphocyte activation. However, the study on how c-Raf regulates adaptive immunity in non-mammal is still limited. In present study, based on analysis of sequence characteristics of c-Raf from Oreochromis niloticus (On-c-Raf), we investigated its regulation roles on teleost lymphocyte activation. The On-c-Raf was highly conserved during evolution, which was composed of a Raf-like Ras-binding domain (RBD), a protein kinase C conserved region 1 (C1) domain and a serine/threonine protein kinase catalytic (S_TKc) domain. Its mRNA showed a wide distribution in tissues of O. niloticus and with the highest expression in gill. After Aeromonas hydrophila infection, during the adaptive immune stage transcription level of On-c-Raf was significantly upregulated on day 8, but came back to original level on day 16 and 30, suggesting the potential involvement of On-c-Raf in primary response but not memory formation. Furthermore, On-c-Raf mRNA in leukocytes of Nile tilapias was obviously induced by in vitro stimulation of T cell mitogen PHA. More importantly, in vitro stimulation of lymphocytes agonist PMA augmented phosphorylation level of On-c-Raf in leukocytes detected by western-blot and immunofluorescent. Thus, c-Raf regulated lymphocyte activation of Nile tilapia on both mRNA and phosphorylation level. Together, our results revealed that the c-Raf from teleost Nile tilapia engaged in adaptive immune response by regulating lymphocytes activation. Since the regulatory mechanism of lymphocyte-mediated adaptive immunity is largely unknown in teleost, our study provided important evidences to understand teleost adaptive immunity, and also shed a novel perspective for the evolution of adaptive immune system.
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Affiliation(s)
- Xiumei Wei
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Tianyu Zhao
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Kete Ai
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Yu Zhang
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Huiying Li
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Jialong Yang
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
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Tham SY, Loh HS, Mai CW, Fu JY. Tocotrienols Modulate a Life or Death Decision in Cancers. Int J Mol Sci 2019; 20:E372. [PMID: 30654580 PMCID: PMC6359475 DOI: 10.3390/ijms20020372] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/05/2019] [Accepted: 01/10/2019] [Indexed: 02/06/2023] Open
Abstract
Malignancy often arises from sophisticated defects in the intricate molecular mechanisms of cells, rendering a complicated molecular ground to effectively target cancers. Resistance toward cell death and enhancement of cell survival are the common adaptations in cancer due to its infinite proliferative capacity. Existing cancer treatment strategies that target a single molecular pathway or cancer hallmark fail to fully resolve the problem. Hence, multitargeted anticancer agents that can concurrently target cell death and survival pathways are seen as a promising alternative to treat cancer. Tocotrienols, a minor constituent of the vitamin E family that have previously been reported to induce various cell death mechanisms and target several key survival pathways, could be an effective anticancer agent. This review puts forward the potential application of tocotrienols as an anticancer treatment from a perspective of influencing the life or death decision of cancer cells. The cell death mechanisms elicited by tocotrienols, particularly apoptosis and autophagy, are highlighted. The influences of several cell survival signaling pathways in shaping cancer cell death, particularly NF-κB, PI3K/Akt, MAPK, and Wnt, are also reviewed. This review may stimulate further mechanistic researches and foster clinical applications of tocotrienols via rational drug designs.
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Affiliation(s)
- Shiau-Ying Tham
- School of Biosciences, Faculty of Science and Engineering, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor, Malaysia.
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science and Engineering, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor, Malaysia.
- Biotechnology Research Centre, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor, Malaysia.
| | - Chun-Wai Mai
- School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia.
- Centre for Cancer and Stem Cell Research, Institute for Research, Development and Innovation, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia.
| | - Ju-Yen Fu
- Nutrition Unit, Product Development and Advisory Services Division, Malaysian Palm Oil Board, 6 Persiaran Institusi, Bandar Baru Bangi, Kajang 43000, Selangor, Malaysia.
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