1
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Gul G, Aydin MA, Algul S, Kiziltan R, Kemik O. Nucleosome assembly protein 1-like 1 (NAP1L1) in gastric cancer patients: a potential biomarker with diagnostic and prognostic utility. Biomarkers 2024; 29:30-35. [PMID: 38258494 DOI: 10.1080/1354750x.2024.2309540] [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: 08/01/2023] [Accepted: 01/14/2024] [Indexed: 01/24/2024]
Abstract
BACKGROUND The nucleosome assembly protein 1-like 1 (NAP1L1) is suggested to have an oncogenic role in several tumors based on its overexpression. However, its diagnostic and prognostic role in gastric cancer remains unclarified. This study aimed to evaluate the diagnostic and prognostic utility of NAP1L1 in gastric cancer patients. METHODS A total of 85 patients [mean (SD) age: 60.9 (1.6) years, 49.4% were males] with newly-diagnosed gastric cancer and 40 healthy individuals [mean (SD) age: 60.7 (1.7) years, 52.5% were males] were included. Data on patient demographics (age, gender), TNM stages and tumor size, and the serum NAP1L1 levels were recorded. RESULTS Serum NAP1L1 levels were significantly higher in gastric cancer patients than in control subjects [12 (9.5-13.8) vs. 1.8 (1.5-2.4) ng/mL, p < 0.001]. Also, certain tumor characteristics such as tumor size of >4 vs. <4 cm (p < 0.001), M1 vs. M0 stage (p < 0.001), N2 vs. N0 and N1 stage (p < 0.001), and T4 vs. lower T stage (p < 0.001) were associated with significantly higher serum NAP1L1 levels in gastric cancer patients. CONCLUSIONS Our findings revealed for the first time that serum levels for NAP1L1 were overexpressed in the gastric cancer, as also correlated with the disease progression. NAP1L1 seems to be a potential biomarker for gastric cancer, providing clinically important information on early diagnosis and risk stratification.
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Affiliation(s)
- Gungor Gul
- Clinic of General Surgery, Private Goztepe Hospital, Istanbul, Turkey
| | - Mehmet Akif Aydin
- Department of General Surgery, Altinbas University Faculty of Medicine Medical Park Bahcelievler Hospital, Istanbul, Turkey
| | - Sermin Algul
- Department of Physiology, Yuzuncu Yil University Faculty of Medicine, Van, Turkey
| | - Remzi Kiziltan
- Department of Surgery, Yuzuncu Yil University Faculty of Medicine, Van, Turkey
| | - Ozgur Kemik
- Department of Surgery, Yuzuncu Yil University Faculty of Medicine, Van, Turkey
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2
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Freitag M, Schwertz H. A New Role of NAP1L1 in Megakaryocytes and Human Platelets. Int J Mol Sci 2022; 23:ijms232314694. [PMID: 36499021 PMCID: PMC9737020 DOI: 10.3390/ijms232314694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 11/26/2022] Open
Abstract
Platelets (PLTs) are anucleate and considered incapable of nuclear functions. Contrastingly, nuclear proteins were detected in human PLTs. For most of these proteins, it is unclear if nuclear or alternatively assigned functions are performed, a question we wanted to address for nuclear assembly protein 1like 1 (NAP1L1). Using a wide array of molecular methods, including RNAseq, co-IP, overexpression and functional assays, we explored expression pattern and functionality of NAP1L1 in PLTs, and CD34+-derived megakaryocytes (MKs). NAP1L1 is expressed in PLTs and MKs. Co-IP experiments revealed that dihydrolipolylysine-residue acetyltransferase (DLAT encoded protein PDC-E2, ODP2) dynamically interacts with NAP1L1. PDC-E2 is part of the mitochondrial pyruvate-dehydrogenase (PDH) multi-enzyme complex, playing a crucial role in maintaining cellular respiration, and promoting ATP-synthesis via the respiratory chain. Since altered mitochondrial function is a hallmark of infectious syndromes, we analyzed PDH activity in PLTs from septic patients demonstrating increased activity, paralleling NAP1L1 expression levels. MKs PDH activity decreased following an LPS-challenge. Furthermore, overexpression of NAP1L1 significantly altered the ability of MKs to form proplatelet extensions, diminishing thrombopoiesis. These results indicate that NAP1L1 performs in other than nucleosome-assembly functions in PTLs and MKs, binding a key mitochondrial protein as a potential chaperone, and gatekeeper, influencing PDH activity and thrombopoiesis.
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Affiliation(s)
- Martin Freitag
- Department of Cardiac Surgery, Heart Center Leipzig-University Hospital, 04289 Leipzig, Germany
| | - Hansjörg Schwertz
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
- Division of Occupational Medicine, University of Utah, Salt Lake City, UT 84112, USA
- Occupational Medicine at Billings Clinic Bozeman, Bozeman, MT 59715, USA
- Correspondence: or
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3
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McKendry J, Stokes T, Mcleod JC, Phillips SM. Resistance Exercise, Aging, Disuse, and Muscle Protein Metabolism. Compr Physiol 2021; 11:2249-2278. [PMID: 34190341 DOI: 10.1002/cphy.c200029] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Skeletal muscle is the organ of locomotion, its optimal function is critical for athletic performance, and is also important for health due to its contribution to resting metabolic rate and as a site for glucose uptake and storage. Numerous endogenous and exogenous factors influence muscle mass. Much of what is currently known regarding muscle protein turnover is owed to the development and use of stable isotope tracers. Skeletal muscle mass is determined by the meal- and contraction-induced alterations of muscle protein synthesis and muscle protein breakdown. Increased loading as resistance training is the most potent nonpharmacological strategy by which skeletal muscle mass can be increased. Conversely, aging (sarcopenia) and muscle disuse lead to the development of anabolic resistance and contribute to the loss of skeletal muscle mass. Nascent omics-based technologies have significantly improved our understanding surrounding the regulation of skeletal muscle mass at the gene, transcript, and protein levels. Despite significant advances surrounding the mechanistic intricacies that underpin changes in skeletal muscle mass, these processes are complex, and more work is certainly needed. In this article, we provide an overview of the importance of skeletal muscle, describe the influence that resistance training, aging, and disuse exert on muscle protein turnover and the molecular regulatory processes that contribute to changes in muscle protein abundance. © 2021 American Physiological Society. Compr Physiol 11:2249-2278, 2021.
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Affiliation(s)
- James McKendry
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Tanner Stokes
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Jonathan C Mcleod
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Stuart M Phillips
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
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4
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Tanaka T, Nakano T, Hozumi Y, Martelli AM, Goto K. Regulation of p53 and NF-κB transactivation activities by DGKζ in catalytic activity-dependent and -independent manners. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:118953. [PMID: 33450306 DOI: 10.1016/j.bbamcr.2021.118953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 12/15/2020] [Accepted: 01/02/2021] [Indexed: 01/03/2023]
Abstract
Diacylglycerol kinase (DGK) constitutes a family of enzymes that phosphorylate diacylglycerol to phosphatidic acid (PA). These lipids serve as second messengers, thereby activating distinct downstream cascades and different cellular responses. Therefore, DG-to-PA conversion activity induces a phase transition of signaling pathways. One member of the family, DGKζ, is involved closely with stress responses. Morphological data showing that DGKζ localizes predominantly to the nucleus and that it shuttles between the nucleus and the cytoplasm implicate DGKζ in the regulation of transcription factors during stress responses. Tumor suppressor p53 and NF-κB are major stress-responsive transcription factors. They exert opposing effects on cellular pathophysiology. Herein, we summarize DGKζ catalytic activity-dependent and -independent regulatory mechanisms of p53 and NF-κB transactivation activities, including p53 degradation and NF-κB nuclear translocation. We also discuss how each component of DGKζ-interacting protein complex modulates the specificity and selectivity of target gene expression.
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Affiliation(s)
- Toshiaki Tanaka
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan.
| | - Tomoyuki Nakano
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Yasukazu Hozumi
- Department of Cell Biology and Morphology, Akita University Graduate School of Medicine, Akita 010-8543, Japan
| | - Alberto M Martelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, via Irnerio 48, 40126 Bologna, Italy
| | - Kaoru Goto
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan.
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5
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Xie D, Zhang S, Chen P, Deng W, Pan Y, Xie J, Wang J, Liao B, Sleasman JW, Zhong XP. Negative control of diacylglycerol kinase ζ-mediated inhibition of T cell receptor signaling by nuclear sequestration in mice. Eur J Immunol 2020; 50:1729-1745. [PMID: 32525220 DOI: 10.1002/eji.201948442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 04/17/2020] [Accepted: 06/09/2020] [Indexed: 12/16/2022]
Abstract
Diacylglycerol kinases (DGKs) play important roles in restraining diacylglycerol (DAG)-mediated signaling. Within the DGK family, the ζ isoform appears to be the most important isoform in T cells for controlling their development and function. DGKζ has been demonstrated to regulate T cell maturation, activation, anergy, effector/memory differentiation, defense against microbial infection, and antitumor immunity. Given its critical functions, DGKζ function should be tightly regulated to ensure proper signal transduction; however, mechanisms that control DGKζ function are still poorly understood. We report here that DGKζ dynamically translocates from the cytosol into the nuclei in T cells after TCR stimulation. In mice, DGKζ mutant defective in nuclear localization displayed enhanced ability to inhibit TCR-induced DAG-mediated signaling in primary T cells, maturation of conventional αβT and iNKT cells, and activation of peripheral T cells compared with WT DGKζ. Our study reveals for the first time nuclear sequestration of DGKζ as a negative control mechanism to spatially restrain it from terminating DAG mediated signaling in T cells. Our data suggest that manipulation of DGKζ nucleus-cytosol shuttling as a novel strategy to modulate DGKζ activity and immune responses for treatment of autoimmune diseases and cancer.
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Affiliation(s)
- Danli Xie
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Shimeng Zhang
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Pengcheng Chen
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Wenhai Deng
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Yun Pan
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Jinhai Xie
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Jinli Wang
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Bryce Liao
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - John W Sleasman
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Xiao-Ping Zhong
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina.,Department of Immunology, Duke University Medical Center, Durham, North Carolina.,Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina
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6
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Joanisse S, Lim C, McKendry J, Mcleod JC, Stokes T, Phillips SM. Recent advances in understanding resistance exercise training-induced skeletal muscle hypertrophy in humans. F1000Res 2020; 9. [PMID: 32148775 PMCID: PMC7043134 DOI: 10.12688/f1000research.21588.1] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/18/2020] [Indexed: 12/22/2022] Open
Abstract
Skeletal muscle plays a pivotal role in the maintenance of physical and metabolic health and, critically, mobility. Accordingly, strategies focused on increasing the quality and quantity of skeletal muscle are relevant, and resistance exercise is foundational to the process of functional hypertrophy. Much of our current understanding of skeletal muscle hypertrophy can be attributed to the development and utilization of stable isotopically labeled tracers. We know that resistance exercise and sufficient protein intake act synergistically and provide the most effective stimuli to enhance skeletal muscle mass; however, the molecular intricacies that underpin the tremendous response variability to resistance exercise-induced hypertrophy are complex. The purpose of this review is to discuss recent studies with the aim of shedding light on key regulatory mechanisms that dictate hypertrophic gains in skeletal muscle mass. We also aim to provide a brief up-to-date summary of the recent advances in our understanding of skeletal muscle hypertrophy in response to resistance training in humans.
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Affiliation(s)
- Sophie Joanisse
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Changhyun Lim
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - James McKendry
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Jonathan C Mcleod
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Tanner Stokes
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Stuart M Phillips
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, Canada
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7
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Tanaka K, Tanaka T, Nakano T, Hozumi Y, Yanagida M, Araki Y, Iwazaki K, Takagi M, Goto K. Knockdown of DEAD-box RNA helicase DDX5 selectively attenuates serine 311 phosphorylation of NF-κB p65 subunit and expression level of anti-apoptotic factor Bcl-2. Cell Signal 2020; 65:109428. [DOI: 10.1016/j.cellsig.2019.109428] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/26/2019] [Accepted: 09/26/2019] [Indexed: 10/25/2022]
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8
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Tanaka T, Hozumi Y, Martelli AM, Iino M, Goto K. Nucleosome assembly proteins NAP1L1 and NAP1L4 modulate p53 acetylation to regulate cell fate. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1866:118560. [DOI: 10.1016/j.bbamcr.2019.118560] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/27/2019] [Accepted: 09/12/2019] [Indexed: 02/08/2023]
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9
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Le Y, Kan A, Li QJ, He MK, Chen HL, Shi M. NAP1L1 is a prognostic biomarker and contribute to doxorubicin chemotherapy resistance in human hepatocellular carcinoma. Cancer Cell Int 2019; 19:228. [PMID: 31516385 PMCID: PMC6729091 DOI: 10.1186/s12935-019-0949-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/27/2019] [Indexed: 02/06/2023] Open
Abstract
Background Hepatocellular carcinoma (HCC) is one of the most fatal cancers, and its molecular basis needs to be delineated to identify biomarkers for its potential treatment. The purpose of this study was to identify a novel gene, nucleosome assembly proteins 1-like 1 protein (NAP1L1), associated with aggressive phenotypes of HCC. Methods Immunohistochemical staining was used to detect NAP1L1 protein expression in HCC tissues. The prognostic value of NAP1L1 expression was determined using Kaplan–Meier analysis and the Cox proportional hazards model. CCK-8 and apoptosis assays were used to detect the chemosensitivity in vitro. Xenograft tumor models were used to evaluate tumor cell proliferation and chemosensitivity in vivo. Results NAP1L1 expression was significantly upregulated in tumor tissues as compared to adjacent non-tumor tissues. High NAP1L1 expression in HCC tissues was associated with aggressive clinicopathologic features, such as serum AFP levels, tumor size and tumor number. Patients with high NAP1L1 expression had poor overall survival in our cohort and in the extra-validation cohort analyzed by TCGA microarray dataset and was further identified as an independent prognostic factor in HCC patients treated with radical resection. Both in vitro and in vivo assays showed that NAP1L1 promoted HCC cell proliferation and contribute to chemotherapy resistance. Further analyses found that some certain stemness associated genes were decreased concurrently with NAP1L1 down-regulation in HCC cell lines. Conclusions Our findings support that NAP1L1 is a prognostic biomarker and may contribute to chemotherapy resistance in human hepatocellular carcinoma.
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Affiliation(s)
- Yong Le
- 1Department of Hepatobiliary Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060 China.,2State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Anna Kan
- 2State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Qi-Jiong Li
- 1Department of Hepatobiliary Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060 China.,2State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Min-Ke He
- 1Department of Hepatobiliary Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060 China.,2State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Hai-Long Chen
- 2State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Ming Shi
- 1Department of Hepatobiliary Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060 China.,2State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
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10
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Iwata K, Sakai H, Takahashi D, Sakane F. Myristic acid specifically stabilizes diacylglycerol kinase δ protein in C2C12 skeletal muscle cells. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1031-1038. [PMID: 30980919 DOI: 10.1016/j.bbalip.2019.04.003] [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] [Received: 02/23/2018] [Revised: 12/20/2018] [Accepted: 01/06/2019] [Indexed: 02/01/2023]
Abstract
Decreased levels of the δ isozyme of diacylglycerol kinase (DGK) in skeletal muscle attenuate glucose uptake and, consequently, are critical for the pathogenesis of type 2 diabetes. We recently found that free myristic acid (14:0), but not free palmitic acid (16:0), increased the DGKδ protein levels and enhanced glucose uptake in C2C12 myotube cells. However, it has been unclear how myristic acid regulates the level of DGKδ2 protein. In the present study, we characterized the myristic acid-dependent increase of DGKδ protein. A cycloheximide chase assay demonstrated that myristic acid, but not palmitic acid, markedly stabilized DGKδ protein. Moreover, other DGK isozymes, DGKη and ζ, as well as glucose uptake-related proteins, such as protein kinase C (PKC) α, PKCζ, Akt and glycogen synthase kinase 3β, failed to be stabilized by myristic acid. Furthermore, DGKδ was not stabilized in cultured hepatocellular carcinoma cells, pancreas carcinoma cells or neuroblastoma cells, and only a moderate stabilizing effect was observed in embryonic kidney cells. A proteasome inhibitor and a lysosome inhibitor, MG132 and chloroquine, respectively, partly inhibited DGKδ degradation, suggesting that myristic acid prevents, at least in part, the degradation of DGKδ by the ubiquitin-proteasome system and the autophagy-lysosome pathway. Overall, these results strongly suggest that myristic acid attenuates DGKδ protein degradation in skeletal muscle cells and that this attenuation is fatty acid-, protein- and cell line-specific. These new findings provide novel insights into the molecular mechanisms of the pathogenesis of type 2 diabetes mellitus.
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Affiliation(s)
- Kai Iwata
- Department of Chemistry, Graduate School of Science, Chiba University, Chiba 263-8522, Japan
| | - Hiromichi Sakai
- Department of Biosignaling and Radioisotope Experiment, Interdisciplinary Center for Science Research, Organization for Research and Academic Information, Shimane University, Izumo 693-8501, Japan
| | - Daisuke Takahashi
- Department of Pharmaceutical Health Care and Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Fumio Sakane
- Department of Chemistry, Graduate School of Science, Chiba University, Chiba 263-8522, Japan.
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11
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NAP1L1 regulates NF-κB signaling pathway acting on anti-apoptotic Mcl-1 gene expression. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1864:1759-1768. [DOI: 10.1016/j.bbamcr.2017.06.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 06/28/2017] [Accepted: 06/30/2017] [Indexed: 01/20/2023]
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12
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Mizuno S, Kado S, Goto K, Takahashi D, Sakane F. Diacylglycerol kinase ζ generates dipalmitoyl-phosphatidic acid species during neuroblastoma cell differentiation. Biochem Biophys Rep 2016; 8:352-359. [PMID: 28955976 PMCID: PMC5614480 DOI: 10.1016/j.bbrep.2016.10.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 10/11/2016] [Accepted: 10/13/2016] [Indexed: 12/29/2022] Open
Abstract
Phosphatidic acid (PA) is one of the phospholipids composing the plasma membrane and acts as a second messenger to regulate a wide variety of important cellular events, including mitogenesis, migration and differentiation. PA consists of various molecular species with different acyl chains at the sn-1 and sn-2 positions. However, it has been poorly understood what PA molecular species are produced during such cellular events. Here we identified the PA molecular species generated during retinoic acid (RA)-induced neuroblastoma cell differentiation using a newly established liquid chromatography/mass spectrometry (LC/MS) method. Intriguingly, the amount of 32:0-PA species was dramatically and transiently increased in Neuro-2a neuroblastoma cells 24-48 h after RA-treatment. In addition, 30:0- and 34:0-PA species were also moderately increased. Moreover, similar results were obtained when Neuro-2a cells were differentiated for 24 h by serum starvation. MS/MS analysis revealed that 32:0-PA species contains two palmitic acids (16:0 s). RT-PCR analysis showed that diacylglycerol kinase (DGK) δ and DGKζ were highly expressed in Neuro-2a cells. The silencing of DGKζ expression significantly decreased the production of 32:0-PA species, whereas DGKδ-siRNA did not. Moreover, neurite outgrowth was also markedly attenuated by the deficiency of DGKζ. Taken together, these results indicate that DGKζ exclusively generates very restricted PA species, 16:0/16:0-PA, and up-regulates neurite outgrowth during the initial/early stage of neuroblastoma cell differentiation.
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Key Words
- DG, diacylglycerol
- DGK, diacylglycerol kinase
- Diacylglycerol kinase
- FBS, fetal bovine serum
- FIPI, 5-fluoro-2-indolyl deschlorohalopemide
- I.S., internal standard
- LC, liquid chromatography
- MS, mass spectrometry
- Mass spectrometry
- Neurite outgrowth
- PA, phosphatidic acid
- PC, phosphatidylcholine
- PLD, phospholipase D
- Phosphatidic acid
- RA, retinoic acid
- Retinoic acid
- Serum starvation
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Affiliation(s)
- Satoru Mizuno
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Sayaka Kado
- Center for Analytical Instrumentation, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Kaoru Goto
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Daisuke Takahashi
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Fumio Sakane
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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Iwazaki K, Tanaka T, Hozumi Y, Okada M, Tsuchiya R, Iseki K, Topham MK, Kawamae K, Takagi M, Goto K. DGKζ Downregulation Enhances Osteoclast Differentiation and Bone Resorption Activity Under Inflammatory Conditions. J Cell Physiol 2016; 232:617-624. [DOI: 10.1002/jcp.25461] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 06/15/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Kiyoshi Iwazaki
- Department of Anatomy and Cell Biology; Yamagata University School of Medicine; Yamagata Japan
- Department of Orthopaedic; Yamagata University School of Medicine; Yamagata Japan
| | - Toshiaki Tanaka
- Department of Anatomy and Cell Biology; Yamagata University School of Medicine; Yamagata Japan
| | - Yasukazu Hozumi
- Department of Anatomy and Cell Biology; Yamagata University School of Medicine; Yamagata Japan
| | - Masashi Okada
- Department of Anatomy and Cell Biology; Yamagata University School of Medicine; Yamagata Japan
| | - Rieko Tsuchiya
- Department of Anatomy and Cell Biology; Yamagata University School of Medicine; Yamagata Japan
| | - Ken Iseki
- Department of Emergency and Critical Care Medicine; Yamagata University School of Medicine; Yamagata Japan
| | - Matthew K. Topham
- Department of Oncological Sciences, Huntsman Cancer Institute; University of Utah; Salt Lake City Utah
| | - Kaneyuki Kawamae
- Department of Anesthesiology; Yamagata University School of Medicine; Yamagata Japan
| | - Michiaki Takagi
- Department of Orthopaedic; Yamagata University School of Medicine; Yamagata Japan
| | - Kaoru Goto
- Department of Anatomy and Cell Biology; Yamagata University School of Medicine; Yamagata Japan
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14
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Tanaka T, Tsuchiya R, Hozumi Y, Nakano T, Okada M, Goto K. Reciprocal regulation of p53 and NF-κB by diacylglycerol kinase ζ. Adv Biol Regul 2015; 60:15-21. [PMID: 26521214 DOI: 10.1016/j.jbior.2015.09.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 09/30/2015] [Accepted: 09/30/2015] [Indexed: 11/29/2022]
Abstract
Diacylglycerol kinase (DGK) participates in lipid mediated-signal transduction. It phosphorylates diacylglycerol (DG) to phosphatidic acid (PA), thereby regulating the balanced control of these second messenger actions. Previous reports have described that one DGK family, DGKζ, is closely involved in stress responses under various conditions. Cellular stress response, a physiological process enabling cells to cope with an altered environment, is finely tuned through various signaling cascades and their molecular crosstalk. The major components of stress response are p53 and NF-κB. p53 generally serves as a proapoptotic transcriptional factor, whereas NF-κB promotes resistance to programmed cell death under most circumstances. Recent studies have suggested that DGKζ facilitates p53 degradation in cytoplasm through ubiquitin proteasome system and that DGKζ deletion upregulates p53 protein levels under basal and DNA-damage conditions. Counter-intuitively, however, DGKζ deletion suppresses p53 transcriptional activity despite increased p53 levels. In contrast, DGKζ knockdown engenders enhancement of NF-κB pathway in response to cytokines such as TNF-α and IL-1β. In response to these cytokines, DGKζ downregulation accelerates phosphorylation of the p65 subunit and its nuclear translocation, thereby enhancing NF-κB transcriptional activity. Furthermore, DGKζ deficiency is shown to promote increased association of p65 subunit with the transcriptional cofactor CBP. It is particularly interesting that this association is observed even under basal conditions in the absence of stimulation. These findings suggest that DGKζ plays a role in sequestration of the limiting pool of CBP/p300 between the NF-κB p65 subunit and p53, and that DGKζ downregulation shifts CBP/p300 toward the NF-κB subunit to regulate reciprocally antagonistic phenotypes of these transcription factors.
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Affiliation(s)
- Toshiaki Tanaka
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan.
| | - Rieko Tsuchiya
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan
| | - Yasukazu Hozumi
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan
| | - Tomoyuki Nakano
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan
| | - Masashi Okada
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan
| | - Kaoru Goto
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Iida-Nishi 2-2-2, Yamagata 990-9585, Japan.
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15
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Hipkaeo W, Chomphoo S, Pakkarato S, Sakaew W, Sawatpanich T, Hozumi Y, Polsan Y, Hipkaeo D, Goto K, Kondo H. Selective localization of diacylglycerol kinase (DGK)ζ in the terminal tubule cells in the submandibular glands of early postnatal mice. Histochem Cell Biol 2015; 144:185-93. [PMID: 25952157 DOI: 10.1007/s00418-015-1328-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2015] [Indexed: 12/16/2022]
Abstract
The present immunohistochemical study was attempted to localize in the submandibular glands of mice at various postnatal stages a diacylglycerol kinase (DGK) isoform termed DGKζ which is characterized by a nuclear localization signal and a nuclear export signal. This attempt was based on following facts: the continuous postnatal differentiation of glandular cells in the rodent submandibular gland, the regulatory role of DGK in the activity of protein kinase C (PKC) through attenuation of diacylglycerol (DAG), and the possible involvement of PKC in various cellular activities including the saliva secretion as well as the cell differentiation. As a result, a selective localization of immunoreactivity for DGKζ was detected in terminal tubule (TT) cells which comprise a majority of the newborn acinar structure and differentiate into the intercalated duct cells and/or the acinar cells. The immunoreactivity was deposited in portions of the cytoplasm lateral and basal to the nucleus, but not in the nuclei themselves. Although the immunoreactive TT cells remained until later stages in female specimen than in male, they eventually disappeared in both sexes by young adult stages. The present finding suggests that the regulatory involvement of DGKζ in PKC functions via control of DAG is exerted in the differentiation of the TT cells. In addition, another possible involvement of DGKζ in the regulation of secretion of the TT cells as well as its functional significance of its nuclear localization in the submandibular ganglion cells was also discussed.
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Affiliation(s)
- Wiphawi Hipkaeo
- Nanomorphology-Based Apply Research Group and Electron Microscopy Unit, Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand,
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16
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Abstract
The human genome encodes seven isoforms of importin α which are grouped into three subfamilies known as α1, α2 and α3. All isoforms share a fundamentally conserved architecture that consists of an N-terminal, autoinhibitory, importin-β-binding (IBB) domain and a C-terminal Arm (Armadillo)-core that associates with nuclear localization signal (NLS) cargoes. Despite striking similarity in amino acid sequence and 3D structure, importin-α isoforms display remarkable substrate specificity in vivo. In the present review, we look at key differences among importin-α isoforms and provide a comprehensive inventory of known viral and cellular cargoes that have been shown to associate preferentially with specific isoforms. We illustrate how the diversification of the adaptor importin α into seven isoforms expands the dynamic range and regulatory control of nucleocytoplasmic transport, offering unexpected opportunities for pharmacological intervention. The emerging view of importin α is that of a key signalling molecule, with isoforms that confer preferential nuclear entry and spatiotemporal specificity on viral and cellular cargoes directly linked to human diseases.
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17
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Gong H, Yan Y, Fang B, Xue Y, Yin P, Li L, Zhang G, Sun X, Chen Z, Ma H, Yang C, Ding Y, Yong Y, Zhu Y, Yang H, Komuro I, Ge J, Zou Y. Knockdown of nucleosome assembly protein 1-like 1 induces mesoderm formation and cardiomyogenesis via notch signaling in murine-induced pluripotent stem cells. Stem Cells 2015; 32:1759-73. [PMID: 24648372 DOI: 10.1002/stem.1702] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 02/11/2014] [Accepted: 02/21/2014] [Indexed: 11/06/2022]
Abstract
Low efficiency of cardiomyocyte differentiation from induced pluripotent stem cells (iPSCs) hinders the clinical application of iPSC technology for cardiac repair strategy. Recently, we screened out nucleosome assembly protein 1-like 1 (Nap1l1), which was downregulated during the differentiation of P19CL6 cells into cardiomyocytes. Here, we attempted to study the role of Nap1l1 in cardiomyogenesis of iPSC. Nap1l1 was downregulated during the differentiation of iPSC. Knockdown of Nap1l1 dramatically enhanced the differentiation of iPSC into functional cardiomyocytes while overexpression of Nap1l1 sharply lowered the differentiation. Moreover, although Nap1l1-knockdown had little effect on endoderm differentiation, the Nap1l1 modulation significantly accelerated mesoderm development. Re-expressing Nap1l1 in Nap1l1-knockdown-iPSC rescued the effects of Nap1l1. Inducibly overexpressing Nap1l1 at early stage of differentiation greatly inhibited mesoderm induction and cardiogenesis of iPSC. However, mesoderm stem cells (Flk-1-positive cells) originated from Nap1l1-knockdown- or -overexpression-iPSC showed no difference in further cardiomyocyte differentiation compared with that of control-iPSC. Further study revealed that Nap1l1-overexpression increased γ-secretase activity and the expression of Notch intracellular domain (NICD) and downstream genes during the differentiation of iPSC. γ-Secretase inhibitor DAPT (N-[N-(3,5-difluorophenacetyl)-L-alanyl]-S-phenylglycinet-butyl ester) greatly suppressed the production of NICD and abolished the inhibitory effects of Nap1l1-overexpression on mesoderm induction and cardiogenesis. These findings demonstrate that downregulation of Nap1l1 significantly enhances mesodermal induction and subsequent cardiogenesis of murine iPSC via inhibition of γ-secretase-regulated Notch signaling, which would facilitate the application of iPSC in heart diseases.
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Affiliation(s)
- Hui Gong
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institutes of Biomedical Sciences, Fudan University, Shanghai, People's Republic of China
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18
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Tsuchiya R, Tanaka T, Hozumi Y, Nakano T, Okada M, Topham MK, Iino M, Goto K. Downregulation of diacylglycerol kinase ζ enhances activation of cytokine-induced NF-κB signaling pathway. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2014; 1853:361-9. [PMID: 25450975 DOI: 10.1016/j.bbamcr.2014.11.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 10/31/2014] [Accepted: 11/10/2014] [Indexed: 01/06/2023]
Abstract
The transcription factor NF-κB family serves as a key component of many pathophysiological events such as innate and adaptive immune response, inflammation, apoptosis, and oncogenesis. Various cell signals trigger activation of the regulatory mechanisms of NF-κB, resulting in its nuclear translocation and transcriptional initiation. The diacylglycerol kinase (DGK) family, a lipid second messenger-metabolizing enzyme in phosphoinositide signaling, is shown to regulate widely various cellular processes. Results of recent studies suggest that one family member, DGKζ, is closely involved in immune and inflammatory responses. Nevertheless, little is known about the regulatory mechanism of DGKζ on NF-κB pathway in cytokine-induced inflammatory signaling. This study shows that siRNA-mediated DGKζ knockdown in HeLa cells facilitates degradation of IκB, followed by nuclear translocation of NF-κB p65 subunit. In addition, DGKζ-deficient MEFs show upregulation of p65 subunit phosphorylation at Serine 468 and 536 and its interaction with CBP transcriptional coactivator upon TNF-α stimulation. These modifications of p65 subunit might engender enhanced NF-κB transcriptional reporter assay of DGKζ knockdown cells. These findings provide further insight into the regulatory mechanisms of cytokine-induced NF-κB activation.
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Affiliation(s)
- Rieko Tsuchiya
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan; Department of Dentistry, Oral and Maxillofacial Plastic and Reconstructive Surgery, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Toshiaki Tanaka
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Yasukazu Hozumi
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Tomoyuki Nakano
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Masashi Okada
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Matthew K Topham
- Huntsman Cancer Institute, Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Mitsuyoshi Iino
- Department of Dentistry, Oral and Maxillofacial Plastic and Reconstructive Surgery, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Kaoru Goto
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan.
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19
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Casanova M, de Monbrison F, van Dijk J, Janke C, Pagès M, Bastien P. Characterisation of polyglutamylases in trypanosomatids. Int J Parasitol 2014; 45:121-32. [PMID: 25444861 DOI: 10.1016/j.ijpara.2014.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 09/16/2014] [Accepted: 09/17/2014] [Indexed: 11/30/2022]
Abstract
Microtubules are subject to post-translational modifications, which are thought to have crucial roles in the function of complex microtubule-based organelles. Among these, polyglutamylation was relatively recently discovered, and was related to centrosome stability, axonemal maintenance and mobility, and neurite outgrowth. In trypanosomatids, parasitic protozoa where microtubules constitute the essential component of the cytoskeleton, the function of polyglutamylated microtubules is unknown. Here, in order to better understand the role of this conserved but highly divergent post-translational modification, we characterised glutamylation and putative polyglutamylases in these parasites. We showed that microtubules are intensely glutamylated in all stages of the cell cycle, including interphase. Moreover, a cell cycle-dependent gradient of glutamylation was observed along the cell anteroposterior axis, which might be related to active growth of the microtubule 'corset' during the cell cycle. We also identified two putative polyglutamylase proteins (among seven analysed here) which appeared to be clearly and directly involved in microtubule polyglutamylation in in vitro activity assays. Paradoxically, in view of the importance of tubulins and of their extensive glutamylation in these organisms, RNA interference-based knockdown of all these proteins had no effect on cell growth, suggesting either functional redundancy or, more likely, subtle roles such as function modulation or interaction with protein partners.
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Affiliation(s)
- Magali Casanova
- Centre National de la Recherche Scientifique (CNRS), 5290-IRD 224-University Montpellier 1, Research Unit "MIVEGEC", Montpellier, France
| | - Frédérique de Monbrison
- Centre National de la Recherche Scientifique (CNRS), 5290-IRD 224-University Montpellier 1, Research Unit "MIVEGEC", Montpellier, France
| | - Juliette van Dijk
- CNRS UMR 5237 - University Montpellier 2 and 1, Research Unit "Centre de Recherche de Biochimie Macromoléculaire", Montpellier, France
| | - Carsten Janke
- CNRS UMR 5237 - University Montpellier 2 and 1, Research Unit "Centre de Recherche de Biochimie Macromoléculaire", Montpellier, France
| | - Michel Pagès
- Centre National de la Recherche Scientifique (CNRS), 5290-IRD 224-University Montpellier 1, Research Unit "MIVEGEC", Montpellier, France
| | - Patrick Bastien
- Centre National de la Recherche Scientifique (CNRS), 5290-IRD 224-University Montpellier 1, Research Unit "MIVEGEC", Montpellier, France; CHU (Hospital University Centre) of Montpellier and University Montpellier 1 (Faculty of Medicine), Laboratoire de Parasitologie-Mycologie, Montpellier, France.
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20
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Matsui H, Hozumi Y, Tanaka T, Okada M, Nakano T, Suzuki Y, Iseki K, Kakehata S, Topham MK, Goto K. Role of the N-terminal hydrophobic residues of DGKε in targeting the endoplasmic reticulum. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1842:1440-50. [PMID: 25048194 DOI: 10.1016/j.bbalip.2014.07.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 06/24/2014] [Accepted: 07/09/2014] [Indexed: 10/25/2022]
Abstract
The endoplasmic reticulum (ER), comprised of an interconnected membrane network, is a site of phospholipid and protein synthesis. The diacylglycerol kinase (DGK) enzyme family catalyzes phosphorylation of diacylglycerol to phosphatidic acid. Both of these lipids are known not only to serve as second messengers but also to represent intermediate precursors of lipids of various kinds. The DGK family is targeted to distinct subcellular sites in cDNA-transfected and native cells. Of DGKs, DGKε localizes primarily to the ER, suggesting that this isozyme plays a role in this organelle. Using experiments with various deletion and substitution mutants, this study examined the molecular mechanism of how DGKε is targeted to the ER. Results demonstrate that the N-terminal hydrophobic sequence 20-40 plays a necessary role in targeting of DGKε to the ER. This hydrophobic amino acid segment is predicted to adopt an α-helix structure, in which Leu22, L25, and L29 are present in mutual proximity, forming a hydrophobic patch. When these hydrophobic Leu residues were replaced with hydrophilic amino acid Gln, the mutant fragment designated DGKε (20-40/L22Q,L25Q,L29Q) exhibits diffuse distribution in the cytoplasm. Moreover, full-length DGKε containing these substitutions, DGKε (L22Q,L25Q,L29Q), is shown to distribute diffusely in the cytoplasm. These results indicate that the N-terminal hydrophobic residues play a key role in DGKε targeting to the ER membrane. Functionally, knockdown or deletion of DGKε affects the unfolding protein response pathways, thereby rendering the cells susceptible to apoptosis, to some degree, under ER stress conditions.
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Affiliation(s)
- Hirooki Matsui
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan; Department of Otolaryngology, Head and Neck Surgery, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Yasukazu Hozumi
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Toshiaki Tanaka
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Masashi Okada
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Tomoyuki Nakano
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Yusuke Suzuki
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan; Department of Otolaryngology, Head and Neck Surgery, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Ken Iseki
- Department of Emergency and Critical Care Medicine, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Seiji Kakehata
- Department of Otolaryngology, Head and Neck Surgery, Yamagata University School of Medicine, Yamagata 990-9585, Japan
| | - Matthew K Topham
- Huntsman Cancer Institute, Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Kaoru Goto
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata 990-9585, Japan.
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21
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Cellular expression and localization of DGKζ-interacting NAP1-like proteins in the brain and functional implications under hypoxic stress. Histochem Cell Biol 2014; 142:461-71. [DOI: 10.1007/s00418-014-1226-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2014] [Indexed: 11/27/2022]
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22
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Goto K, Tanaka T, Nakano T, Okada M, Hozumi Y, Topham MK, Martelli AM. DGKζ under stress conditions: “to be nuclear or cytoplasmic, that is the question”. Adv Biol Regul 2014; 54:242-253. [PMID: 24119575 DOI: 10.1016/j.jbior.2013.08.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 08/31/2013] [Indexed: 06/02/2023]
Abstract
Eukaryotic cells have evolved to possess a distinct subcellular compartment, the nucleus, separated from the cytoplasm in a manner that allows the precise operation of the chromatin, thereby permitting controlled access to the regulatory elements in the DNA for transcription and replication. In the cytoplasm, genetic information contained in the DNA sequence is translated into proteins, including enzymes that catalyze various reactions, such as metabolic processes, energy control, and responses to changing environments. One mechanism that regulates these events involves phosphoinositide turnover signaling, which generates a lipid second messenger, diacylglycerol (DG). Since DG acts as a potent activator of several signaling molecules, it should be tightly regulated to keep cellular responsiveness within a physiological range. DG kinase (DGK) metabolizes DG by phosphorylating it to generate phosphatidic acid, thus serving as a critical regulator of DG signaling. Phosphoinositide turnover is employed differentially in the nucleus and the cytoplasm. A member of the DGK family, DGKζ, localizes to the nucleus in various cell types and is considered to regulate nuclear DG signaling. Recent studies have provided evidence that DGKζ shuttles between the nucleus and the cytoplasm in neurons under pathophysiological conditions. Transport of a signal regulator between the nucleus and the cytoplasm should be a critical function for maintaining basic processes in the nucleus, such as cell cycle regulation and gene expression, and to ensure communication between nuclear processes and cytoplasmic functions. In this review, a series of studies on nucleocytoplasmic translocation of DGKζ have been summarized, and the functional implications of this phenomenon in postmitotic neurons and cancer cells under stress conditions are discussed.
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23
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O'Seaghdha CM, Wu H, Yang Q, Kapur K, Guessous I, Zuber AM, Köttgen A, Stoudmann C, Teumer A, Kutalik Z, Mangino M, Dehghan A, Zhang W, Eiriksdottir G, Li G, Tanaka T, Portas L, Lopez LM, Hayward C, Lohman K, Matsuda K, Padmanabhan S, Firsov D, Sorice R, Ulivi S, Brockhaus AC, Kleber ME, Mahajan A, Ernst FD, Gudnason V, Launer LJ, Mace A, Boerwinckle E, Arking DE, Tanikawa C, Nakamura Y, Brown MJ, Gaspoz JM, Theler JM, Siscovick DS, Psaty BM, Bergmann S, Vollenweider P, Vitart V, Wright AF, Zemunik T, Boban M, Kolcic I, Navarro P, Brown EM, Estrada K, Ding J, Harris TB, Bandinelli S, Hernandez D, Singleton AB, Girotto G, Ruggiero D, d'Adamo AP, Robino A, Meitinger T, Meisinger C, Davies G, Starr JM, Chambers JC, Boehm BO, Winkelmann BR, Huang J, Murgia F, Wild SH, Campbell H, Morris AP, Franco OH, Hofman A, Uitterlinden AG, Rivadeneira F, Völker U, Hannemann A, Biffar R, Hoffmann W, Shin S, Lescuyer P, Henry H, Schurmann C, Munroe PB, Gasparini P, Pirastu N, Ciullo M, Gieger C, März W, Lind L, Spector TD, Smith AV, Rudan I, Wilson JF, Polasek O, Deary IJ, Pirastu M, Ferrucci L, Liu Y, Kestenbaum B, Kooner JS, Witteman JCM, Nauck M, Kao WHL, Wallaschofski H, Bonny O, Fox CS, Bochud M. Meta-analysis of genome-wide association studies identifies six new Loci for serum calcium concentrations. PLoS Genet 2013; 9:e1003796. [PMID: 24068962 PMCID: PMC3778004 DOI: 10.1371/journal.pgen.1003796] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 07/29/2013] [Indexed: 01/08/2023] Open
Abstract
Calcium is vital to the normal functioning of multiple organ systems and its serum concentration is tightly regulated. Apart from CASR, the genes associated with serum calcium are largely unknown. We conducted a genome-wide association meta-analysis of 39,400 individuals from 17 population-based cohorts and investigated the 14 most strongly associated loci in ≤ 21,679 additional individuals. Seven loci (six new regions) in association with serum calcium were identified and replicated. Rs1570669 near CYP24A1 (P = 9.1E-12), rs10491003 upstream of GATA3 (P = 4.8E-09) and rs7481584 in CARS (P = 1.2E-10) implicate regions involved in Mendelian calcemic disorders: Rs1550532 in DGKD (P = 8.2E-11), also associated with bone density, and rs7336933 near DGKH/KIAA0564 (P = 9.1E-10) are near genes that encode distinct isoforms of diacylglycerol kinase. Rs780094 is in GCKR. We characterized the expression of these genes in gut, kidney, and bone, and demonstrate modulation of gene expression in bone in response to dietary calcium in mice. Our results shed new light on the genetics of calcium homeostasis.
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Affiliation(s)
- Conall M. O'Seaghdha
- National Heart, Lung, and Blood Institute's Framingham Heart Study and Center for Population Studies, Framingham, Massachusetts, United States of America
- Renal Division, Massachusetts General Hospital, Boston, Massachusetts, United States of America
| | - Hongsheng Wu
- National Heart, Lung, and Blood Institute's Framingham Heart Study and Center for Population Studies, Framingham, Massachusetts, United States of America
- Department of Biostatistics, Boston University, Boston, Massachusetts, United States of America
- Department of Medical Biology, University of Split, School of Medicine, Split, Croatia
| | - Qiong Yang
- National Heart, Lung, and Blood Institute's Framingham Heart Study and Center for Population Studies, Framingham, Massachusetts, United States of America
- Department of Biostatistics, Boston University, Boston, Massachusetts, United States of America
| | - Karen Kapur
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
| | - Idris Guessous
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital, Lausanne, Switzerland
- Unit of Population Epidemiology, Division of Primary Care Medicine, Department of Community Medicine and Primary Care and Emergency Medicine, Geneva University Hospitals, Geneva, Switzerland
- Geriatric Unit, Azienda Sanitaria Firenze (ASF), Florence, Italy
| | - Annie Mercier Zuber
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland
| | - Anna Köttgen
- Renal Division, Freiburg University Hospital, Freiburg, Germany
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
| | - Candice Stoudmann
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland
| | - Alexander Teumer
- Interfaculty Institute for Genetics and Functional Genomics, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | - Zoltán Kutalik
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Massimo Mangino
- King's College London, St. Thomas' Hospital Campus, London, United Kingdom
| | - Abbas Dehghan
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Weihua Zhang
- Catheter Lab, Cardiology, Ealing Hospital, Southall, Middlesex, United Kingdom
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
| | | | - Guo Li
- Cardiovascular Health Research Unit, University of Washington, Seattle, Washington, United States of America
| | - Toshiko Tanaka
- Clinical Research Branch, National Institute on Aging, Baltimore, Maryland, United States of America
| | - Laura Portas
- Institute of Population Genetics, CNR-Traversa La Crucca, Reg. Baldinca Li Punti, Sassari, Italy
| | - Lorna M. Lopez
- Centre for Cognitive Ageing and Cognitive Epidemiology, The University of Edinburgh, Edinburgh, United Kingdom
| | - Caroline Hayward
- MRC Human Genetics Unit, MRC IGMM, University of Edinburgh, Edinburgh, United Kingdom
| | - Kurt Lohman
- Cardiology Group, ClinPhenomics GmbH&Co KG, Frankfurt-Sachsenhausen, Germany
| | - Koichi Matsuda
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Sandosh Padmanabhan
- BHF Glasgow Cardiovascular Research Centre, Division of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, Scotland
| | - Dmitri Firsov
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland
| | - Rossella Sorice
- Institute of Genetics and Biophysics ‘Adriano-Buzzati Traverso’, CNR, Napoli, Italy
| | - Sheila Ulivi
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - A. Catharina Brockhaus
- Institute of Genetic Epidemiology, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
- Department of Medicine I, University Hospital Grosshadern, Ludwig-Maximilians University Munich, Munich, Germany
| | - Marcus E. Kleber
- Department of Internal Medicine II – Cardiology, University of Ulm Medical Centre, Ulm, Germany
- Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Anubha Mahajan
- Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford, United Kingdom
| | - Florian D. Ernst
- Interfaculty Institute for Genetics and Functional Genomics, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | - Vilmundur Gudnason
- Icelandic Heart Association Research Institute, Kopavogur, Iceland
- University of Iceland, Reykjavik, Iceland
| | - Lenore J. Launer
- Laboratory of Epidemiology, Demography and Biometry, National Institute on Aging, Bethesda, Maryland, United States of America
| | - Aurelien Mace
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Eric Boerwinckle
- University of Texas Health Science Center at Houston, Houston, Texas, United States of America
| | - Dan E. Arking
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Chizu Tanikawa
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Yusuke Nakamura
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Morris J. Brown
- Cambridge Institute of Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - Jean-Michel Gaspoz
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Jean-Marc Theler
- Unit of Population Epidemiology, Division of Primary Care Medicine, Department of Community Medicine and Primary Care and Emergency Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - David S. Siscovick
- Cardiovascular Health Research Unit, University of Washington, Seattle, Washington, United States of America
- Departments of Medicine and Epidemiology, University of Washington, Seattle, Washington, United States of America
| | - Bruce M. Psaty
- Cardiovascular Health Research Unit, University of Washington, Seattle, Washington, United States of America
- Group Health Research Institute, Group Health Cooperative, Seattle, Washington, United States of America
- Departments of Medicine, Epidemiology and Health Services, University of Washington, Seattle, Washington, United States of America
| | - Sven Bergmann
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Peter Vollenweider
- Department of Medicine, Internal Medicine, Lausanne University Hospital, Lausanne, Switzerland
| | - Veronique Vitart
- MRC Human Genetics Unit, MRC IGMM, University of Edinburgh, Edinburgh, United Kingdom
| | - Alan F. Wright
- MRC Human Genetics Unit, MRC IGMM, University of Edinburgh, Edinburgh, United Kingdom
| | | | - Mladen Boban
- Department of Pharmacology, Faculty of Medicine, University of Split, Split, Croatia
| | - Ivana Kolcic
- Faculty of Medicine, University of Split, Split, Croatia
| | - Pau Navarro
- MRC Human Genetics Unit, MRC IGMM, University of Edinburgh, Edinburgh, United Kingdom
| | - Edward M. Brown
- Division of Laboratory Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - Karol Estrada
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Jingzhong Ding
- Division of Laboratory Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - Tamara B. Harris
- Laboratory of Epidemiology, Demography and Biometry, National Institute on Aging, Bethesda, Maryland, United States of America
| | - Stefania Bandinelli
- Department of Human Genetics, Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom
| | - Dena Hernandez
- Molecular Genetics Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Andrew B. Singleton
- Molecular Genetics Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Giorgia Girotto
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Daniela Ruggiero
- Institute of Genetics and Biophysics ‘Adriano-Buzzati Traverso’, CNR, Napoli, Italy
| | - Adamo Pio d'Adamo
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Antonietta Robino
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Thomas Meitinger
- Institute of Human Genetics, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
- Department of Computer Science and Networking, Wentworth Institute of Technology, Boston, Massachusetts, United States of America
| | - Christa Meisinger
- Institute of Epidemiology II, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Gail Davies
- Centre for Cognitive Ageing and Cognitive Epidemiology, The University of Edinburgh, Edinburgh, United Kingdom
| | - John M. Starr
- Centre for Cognitive Ageing and Cognitive Epidemiology, The University of Edinburgh, Edinburgh, United Kingdom
| | - John C. Chambers
- Catheter Lab, Cardiology, Ealing Hospital, Southall, Middlesex, United Kingdom
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
- Epidemiology and Biostatistics, Imperial College London, Norfolk Place, London, United Kingdom
| | - Bernhard O. Boehm
- Ulm University Medical Centre, Department of Internal Medicine I, Ulm University, Ulm, Germany
- LKC School of Medicine, Imperial College London and Nanyang Technological University, Singapore, Singapore
| | - Bernhard R. Winkelmann
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, United States of America
| | - Jie Huang
- Division of Primary Care Medicine, Department of Community Medicine and Primary Care and Emergency Medicine , Geneva University Hospitals, Geneva, Switzerland
| | - Federico Murgia
- Institute of Population Genetics, CNR-Traversa La Crucca, Reg. Baldinca Li Punti, Sassari, Italy
| | - Sarah H. Wild
- Centre for Population Health Sciences, The University of Edinburgh Medical School, Edinburgh, Scotland, United Kingdom
| | - Harry Campbell
- Centre for Population Health Sciences, The University of Edinburgh Medical School, Edinburgh, Scotland, United Kingdom
| | - Andrew P. Morris
- Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford, United Kingdom
| | - Oscar H. Franco
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Albert Hofman
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Andre G. Uitterlinden
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Fernando Rivadeneira
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Uwe Völker
- Interfaculty Institute for Genetics and Functional Genomics, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | - Anke Hannemann
- Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany
| | - Reiner Biffar
- Department of Prosthetic Dentistry, Gerostomatology and Dental Materials, University Medicine Greifswald, Greifswald, Germany
| | - Wolfgang Hoffmann
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - So–Youn Shin
- Human Genetics, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Pierre Lescuyer
- Department of Biostatistical Sciences, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Hughes Henry
- Clinical Chemistry Laboratory, Lausanne University Hospital, Lausanne, Switzerland
| | - Claudia Schurmann
- Interfaculty Institute for Genetics and Functional Genomics, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | | | | | - Patricia B. Munroe
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Paolo Gasparini
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Nicola Pirastu
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Marina Ciullo
- Institute of Genetics and Biophysics ‘Adriano-Buzzati Traverso’, CNR, Napoli, Italy
| | - Christian Gieger
- Institute of Genetic Epidemiology, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - Winfried März
- Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
- Synlab Centre of Laboratory Diagnostics, Heidelberg, Germany
| | - Lars Lind
- Institute of Medical Sciences, Uppsala University Hospital, Uppsala, Sweden
| | - Tim D. Spector
- King's College London, St. Thomas' Hospital Campus, London, United Kingdom
| | - Albert V. Smith
- Icelandic Heart Association Research Institute, Kopavogur, Iceland
- University of Iceland, Reykjavik, Iceland
| | - Igor Rudan
- Centre for Population Health Sciences, The University of Edinburgh Medical School, Edinburgh, Scotland, United Kingdom
| | - James F. Wilson
- Centre for Population Health Sciences, The University of Edinburgh Medical School, Edinburgh, Scotland, United Kingdom
| | - Ozren Polasek
- Faculty of Medicine, University of Split, Split, Croatia
| | - Ian J. Deary
- Centre for Cognitive Ageing and Cognitive Epidemiology, The University of Edinburgh, Edinburgh, United Kingdom
| | - Mario Pirastu
- Institute of Population Genetics, CNR-Traversa La Crucca, Reg. Baldinca Li Punti, Sassari, Italy
| | - Luigi Ferrucci
- Laboratory of Epidemiology, Demography and Biometry, National Institute on Aging, Bethesda, Maryland, United States of America
| | - Yongmei Liu
- Department of Epidemiology and Prevention, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Bryan Kestenbaum
- Department of Medicine, Division of Nephrology, University of Washington, Seattle, Washington, United States of America
| | - Jaspal S. Kooner
- Catheter Lab, Cardiology, Ealing Hospital, Southall, Middlesex, United Kingdom
- Faculty of Medicine, National Heart & Lung Institute, Cardiovascular Science, Hammersmith Hospital, Hammersmith Campus, Imperial College London, London, United Kingdom
- Imperial College Healthcare NHS Trust, London, United Kingdom
| | | | - Matthias Nauck
- Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany
| | - W. H. Linda Kao
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
- Welch Center for Prevention, Epidemiology and Clinical Research, John Hopkins University, Baltimore, Maryland, United States of America
| | - Henri Wallaschofski
- Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany
| | - Olivier Bonny
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland
- Service of Nephrology, Lausanne University Hospital, Lausanne, Switzerland
| | - Caroline S. Fox
- National Heart, Lung, and Blood Institute's Framingham Heart Study and Center for Population Studies, Framingham, Massachusetts, United States of America
- Division of Endocrinology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Murielle Bochud
- Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital, Lausanne, Switzerland
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Attia M, Rachez C, Avner P, Rogner UC. Nucleosome assembly proteins and their interacting proteins in neuronal differentiation. Arch Biochem Biophys 2013; 534:20-6. [DOI: 10.1016/j.abb.2012.09.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 09/21/2012] [Accepted: 09/22/2012] [Indexed: 12/21/2022]
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Li L, Gong H, Yu H, Liu X, Liu Q, Yan G, Zhang Y, Lu H, Zou Y, Yang P. Knockdown of nucleosome assembly protein 1-like 1 promotes dimethyl sulfoxide-induced differentiation of P19CL6 cells into cardiomyocytes. J Cell Biochem 2013; 113:3788-96. [PMID: 22807403 DOI: 10.1002/jcb.24254] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Transplantation of cardiomyocytes derived from stem cells is a promising option for cardiac repair. However, how to obtain efficient cardiomyocytes from stem cells is still a great challenge. Understanding of the mechanism that regulates the cardiac differentiation of stem cells is necessary for the effective induction of cardiomyocytes. A clonal derivative named P19CL6 cells can easily differentiate into cardiomyocytes with 1% dimethyl sulfoxide (DMSO) treatment, which offers a valuable model to study cardiomyocytes differentiation in vitro. In this study, the isobaric tags for relative and absolute quantitation (iTRAQ) proteomics were performed to identify proteins associated with cardiomyocytes differentiation of P19CL6 cells induced by DMSO. Out of 543 non-redundant proteins identified, 207 proteins showed significant changes during differentiation with ≥1.2-fold or ≤0.83-fold changes cut-offs. Nine proteins were confirmed by the quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot analysis respectively. Notably, broad consistency was well showed between mRNA and protein expression for down-regulation of nucleosome assembly protein 1-like 1 (Nap1l1). Further study revealed that knockdown of Nap1l1 by stable transfection of shRNA vector significantly accelerated DMSO-induced cardiomyocytes differentiation of P19CL6 cells characterized by increases in expression of cardiac specific transcription factors, genes, and proteins (GATA4, MEF-2C, ANP, BNP, cTNT, and β-MHC). Therefore, Nap1l1 is a novel protein that regulates cardiomyocytes differentiation of P19CL6 cells induced by DMSO.
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Affiliation(s)
- Lu Li
- Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
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26
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Hozumi Y, Matsui H, Sakane F, Watanabe M, Goto K. Distinct expression and localization of diacylglycerol kinase isozymes in rat retina. J Histochem Cytochem 2013; 61:462-76. [PMID: 23467923 DOI: 10.1369/0022155413483574] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Recent studies have revealed that phosphoinositide (PI) signaling molecules are expressed in mammalian retinas, suggesting their importance in its signal transduction. We previously showed that diacylglycerol kinase (DGK) isozymes are expressed in distinct patterns in rat retina at the mRNA level. However, little is known about the nature and morphological aspects of DGKs in the retina. For this study, we performed immunohistochemical analyses to investigate in the retina the expression and localization of DGK isozymes at the protein level. Here, we show that both DGKβ and DGKι localize in the outer plexiform layer, within which photoreceptor cells make contact with bipolar and horizontal cells. These isozymes exhibit distinct subcellular localization patterns: DGKι localizes to the synaptic area of bipolar cells in a punctate manner, whereas DGKβ distributes diffusely in the subsynaptic and dendritic regions of bipolar and horizontal cells. However, punctate labeling for DGKε is evident in the outer limiting membrane. DGKζ and DGKα localize predominantly to the nucleus of ganglion cells. These findings show distinct expression and localization of DGK isozymes in the retina, suggesting a different role of each isozyme.
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Affiliation(s)
- Yasukazu Hozumi
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata, Japan.
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Cognitive enhancement with rosiglitazone links the hippocampal PPARγ and ERK MAPK signaling pathways. J Neurosci 2013; 32:16725-35a. [PMID: 23175826 DOI: 10.1523/jneurosci.2153-12.2012] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
We previously reported that the peroxisome proliferator-activated receptor γ (PPARγ) agonist rosiglitazone (RSG) improved hippocampus-dependent cognition in the Alzheimer's disease (AD) mouse model, Tg2576. RSG had no effect on wild-type littermate cognitive performance. Since extracellular signal-regulated protein kinase mitogen-activated protein kinase (ERK MAPK) is required for many forms of learning and memory that are affected in AD, and since both PPARγ and ERK MAPK are key mediators of insulin signaling, the current study tested the hypothesis that RSG-mediated cognitive improvement induces a hippocampal PPARγ pattern of gene and protein expression that converges with the ERK MAPK signaling axis in Tg2576 AD mice. In the hippocampal PPARγ transcriptome, we found significant overlap between peroxisome proliferator response element-containing PPARγ target genes and ERK-regulated, cAMP response element-containing target genes. Within the Tg2576 dentate gyrus proteome, RSG induced proteins with structural, energy, biosynthesis and plasticity functions. Several of these proteins are known to be important for cognitive function and are also regulated by ERK MAPK. In addition, we found the RSG-mediated augmentation of PPARγ and ERK2 activity during Tg2576 cognitive enhancement was reversed when hippocampal PPARγ was pharmacologically antagonized, revealing a coordinate relationship between PPARγ transcriptional competency and phosphorylated ERK that is reciprocally affected in response to chronic activation, compared with acute inhibition, of PPARγ. We conclude that the hippocampal transcriptome and proteome induced by cognitive enhancement with RSG harnesses a dysregulated ERK MAPK signal transduction pathway to overcome AD-like cognitive deficits in Tg2576 mice. Thus, PPARγ represents a signaling system that is not crucial for normal cognition yet can intercede to restore neural networks compromised by AD.
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Tanaka T, Okada M, Hozumi Y, Tachibana K, Kitanaka C, Hamamoto Y, Martelli AM, Topham MK, Iino M, Goto K. Cytoplasmic localization of DGKζ exerts a protective effect against p53-mediated cytotoxicity. J Cell Sci 2013; 126:2785-97. [DOI: 10.1242/jcs.118711] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The transcription factor p53 plays a crucial role in coordinating the cellular response to various stresses. Therefore, p53 protein levels and activity need to be kept under tight control. We report here that diacylglycerol kinase ζ (DGKζ) binds to p53 and modulates its function both in the cytoplasm and nucleus. DGKζ, one of the DGK family that metabolizes a lipid second messenger diacylglycerol, localizes primarily to the nucleus in various cell types. Recently, reports have described that excitotoxic stress induces DGKζ nucleocytoplasmic translocation in hippocampal neurons. In this study, we found that cytoplasmic DGKζ attenuates p53-mediated cytotoxicity against doxorubicin-induced DNA damage by facilitating cytoplasmic anchoring and degradation of p53 through a ubiquitin–proteasome system. Concomitantly, decreased levels of nuclear DGKζ engender down-regulation of p53 transcriptional activity. Consistent with these in vitro cellular experiments, DGKζ-deficient brain exhibits high levels of p53 protein after kainate-induced seizures and even under normal conditions. These findings provide novel insights into the regulation of p53 function and suggest that DGKζ serves as a sentinel to control p53 function both during normal homeostasis and in stress responses.
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Okada M, Hozumi Y, Tanaka T, Suzuki Y, Yanagida M, Araki Y, Evangelisti C, Yagisawa H, Topham MK, Martelli AM, Goto K. DGKζ is degraded through the cytoplasmic ubiquitin–proteasome system under excitotoxic conditions, which causes neuronal apoptosis because of aberrant cell cycle reentry. Cell Signal 2012; 24:1573-82. [DOI: 10.1016/j.cellsig.2012.03.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Accepted: 03/28/2012] [Indexed: 12/29/2022]
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30
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Okada M, Hozumi Y, Iwazaki K, Misaki K, Yanagida M, Araki Y, Watanabe T, Yagisawa H, Topham MK, Kaibuchi K, Goto K. DGKζ is involved in LPS-activated phagocytosis through IQGAP1/Rac1 pathway. Biochem Biophys Res Commun 2012; 420:479-84. [DOI: 10.1016/j.bbrc.2012.03.057] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Accepted: 03/12/2012] [Indexed: 12/25/2022]
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